Restructuring and Related Activities [Abstract] Restructuring, Impairment, and Other Activities Disclosure [Text Block] Restructuring, Impairment, and Other Activities Disclosure [Text Block] Revenue Recognition and Deferred Revenue [Abstract] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue, Remaining Performance Obligation Revenue, Remaining Performance Obligation Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Business Combinations [Abstract] Business Combination Disclosure [Text Block] Business Combination Disclosure [Text Block] Earnings Per Share [Abstract] Earnings Per Share [Text Block] Earnings Per Share [Text Block] Fair Value Disclosures [Abstract] Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Derivative Instrument [Axis] Derivative Instrument [Axis] Derivative Contract [Domain] Derivative Contract [Domain] Interest Rate Swap [Member] Interest Rate Swap [Member] Interest Rate Cap [Member] Interest Rate Cap [Member] Measurement Basis [Axis] Measurement Basis [Axis] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Portion at Other than Fair Value Measurement [Member] Portion at Fair Value Measurement [Member] Reported Value Measurement [Member] Reported Value Measurement [Member] Estimate of Fair Value Measurement [Member] Estimate of Fair Value Measurement [Member] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] USD Denominated Term Loan [Member] USD Denominated Term Loan [Member] USD Denominated Term Loan [Member] Line of Credit [Member] Line of Credit [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Assets Assets [Abstract] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Restricted Cash Restricted Cash Foreign exchange forwards Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Asset at Fair Value Derivative Asset, Noncurrent Derivative Asset, Noncurrent Liabilities Liabilities [Abstract] USD denominated term loan Loans Payable to Bank Long-term Debt, Fair Value Long-term Debt, Fair Value Multicurrency revolving line of credit Long-term Line of Credit Line of Credit Facility, Fair Value of Amount Outstanding Line of Credit Facility, Fair Value of Amount Outstanding Senior Notes Senior Notes Interest rate swaps Interest Rate Derivative Liabilities, at Fair Value Foreign exchange forwards Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Liability at Fair Value Accounts Receivable, Net, Current [Abstract] Trade receivables (net of allowance of $4,774 and $3,957) Accounts Receivable, Net, Current Unbilled receivables Unbilled Receivables, Current Total accounts receivable, net Receivables, Net, Current Contract with Customer, net Contract with Customer, net Contract with Customer, net Contract with Customer, Liability, Increase (Decrease) for Contract Acquired in Business Combination Contract with Customer, Liability, Increase (Decrease) for Contract Acquired in Business Combination Revenue recognized from beginning contract liability Contract with Customer, Performance Obligation Satisfied in Previous Period Revenue recognized from amounts added in the current period Contract with Customer, Liability, Revenue Recognized Increases due to amounts billed in the current period Contract with Customer, Asset, Reclassified to Receivable Other adjustments Contract with Customer, Other adjustments Contract with Customer, Other adjustments Contract with Customer, net Share-based Compensation [Abstract] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Award Type [Axis] Award Type [Axis] Equity Award [Domain] Restricted Stock Units (RSUs) [Member] Restricted Stock Units (RSUs) [Member] Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] Long Term Performance Restricted Stock Award [Member] Long Term Performance Restricted Stock Award [Member] Restricted stock awards related to the Long Term Performance Plan (LTPP), which may only become eligible for vesting based upon satisfaction of certain performance condition(s), market condition(s), and/or required service periods. Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Dividend yield(1) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Expected volatility Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Risk-free interest rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Expected term (years) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Weighted average fair value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Stockholders' Equity Note [Abstract] Total Comprehensive Income (Loss) [Table Text Block] Comprehensive Income (Loss) [Table Text Block] Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Total Intangible Assets [Abstract] Total Intangible Assets [Abstract] Beginning balance, intangible assets, gross Finite-Lived Intangible Assets, Gross Finite-lived Intangible Assets Acquired Impairment of Intangible Assets, Finite-lived Impairment of Intangible Assets, Finite-lived Effect of change in exchange rates Finite Lived Intangible Assets, Foreign Currency Translation Gain (Loss) Intangible Assets, Gross (Excluding Goodwill) Intangible Assets, Gross (Excluding Goodwill) Finite-lived intangible liabilities, Gross Finite-lived intangible liabilities, Gross Finite-lived intangible liabilities, Gross Finite-Lived Intangible Liabilities Acquired Finite-Lived Intangible Liabilities Acquired Finite-Lived Intangible Liabilities Acquired Finite-Lived Intangible Liabilities, Foreign Currency Translation Gain Loss Finite-Lived Intangible Liabilities, Foreign Currency Translation Gain Loss Finite-Lived Intangible Liabilities, Foreign Currency Translation Gain Loss Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table] Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table] Stock Incentive Plan [Member] Stock Incentive Plan [Member] 2010 Stock Incentive Plan, which consists of stock options, restricted stock units, and unrestricted stock awards. SSNI Plan [Member] SSNI Plan [Member] SSNI Plan [Member] Employee Stock Option [Member] Phantom Share Units (PSUs) [Member] Phantom Share Units (PSUs) [Member] Employee Stock Purchase Plan [Member] Employee Stock [Member] [Line Items] Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Reduction in stock options available for issue Authorized share reserve reduction in stock options or share appreciation rights available for issue, conversion ratio The Stock Incentive Plan shares are subject to a fungible share provision such that, with respect to grants made after December 31, 2009, the authorized share reserve is reduced by (i) one share for every one share subject to a stock option or share appreciation right granted under the Plan. Authorized share reserve reduction in awards other than stock options or share appreciation rights available for issue, conversion ratio Authorized share reserve reduction in awards other than stock options or share appreciation rights available for issue, conversion ratio The Stock Incentive Plan shares are subject to a fungible share provide such that, with respect to grants made after December 31, 2009, the authorized share reserve is reduced by (ii) 1.7 shares for every one share of common stock that was subject to an award other than an option or stock appreciation right. Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Unrecognized compensation expense, Expected weighted average period for recognition (years) Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Deferred Compensation Share-based Arrangements, Liability, Current Deferred Compensation Share-based Arrangements, Liability, Current Goodwill Excluding Non Goodwill Intangibles [Abstract] Goodwill, excluding non-goodwill intangible assets [Abstract] Schedule of Goodwill [Table Text Block] Schedule of Goodwill [Table Text Block] Computation of Basic and Diluted Earnings Per Share [Table Text Block] Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Intangible Assets, Net (Excluding Goodwill) [Abstract] Schedule of Intangible Assets by Major Class [Table Text Block] Schedule of Finite-Lived Intangible Assets [Table Text Block] Summary of Intangible Asset Account Activity [Table Text Block] SummaryOfIntangibleAssetAccountActivity [Table Text Block] Summary schedule of intangible asset activity for the period (Table Text Block). Schedule of Intangible Assets, Future Amortization Expense [Table Text Block] Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Derivative Financial Instruments [Abstract] Derivative Financial Instruments [Abstract] Effect of Foreign Exchange Option and Forward Derivatives in the Income Statement (Table) Derivative Instruments, Gain (Loss) [Table] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Other Income (Expense) [Member] Other Income (Expense) [Member] Interest Expense [Member] Interest Expense [Member] Derivative Instruments, Gain (Loss) [Line Items] Derivative Instruments, Gain (Loss) [Line Items] Derivative Instruments Not Designated as Hedging Instruments [Abstract] Foreign exchange forward contracts Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments Gain (Loss) on Interest Rate Derivative Instruments Not Designated as Hedging Instruments Gain (Loss) on Interest Rate Derivative Instruments Not Designated as Hedging Instruments Commitments and Contingencies Disclosure [Abstract] Line of Credit Facility [Table] Line of Credit Facility [Table] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Guarantor Obligations, Nature [Axis] Guarantor Obligations, Nature [Axis] Guarantor Obligations, Nature [Domain] Guarantor Obligations, Nature [Domain] Surety Bond [Member] Surety Bond [Member] Loss Contingencies by Nature of Contingency [Axis] Loss Contingency Nature [Axis] Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Credit Facility [Member] Credit Facility [Member] Credit Facility dated in August 2011, consisting of a $300 million U.S. dollar term loan and a multicurrency revolving line of credit with a principal amount of up to $660 million. Unsecured Multicurrency Revolving Lines of Credit [Member] Unsecured Multicurrency Revolving Lines of Credit [Member] Unsecured multicurrency revolving lines of credit with various financial institutions.[Member] Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Multicurrency revolving line of credit Line of Credit Facility, Maximum Borrowing Capacity Letters of Credit Outstanding, Amount Letters of Credit Outstanding, Amount Short-term borrowings Short-term Debt Line of Credit Facility, Remaining Borrowing Capacity Line of Credit Facility, Capacity remaining to support letters of credit Line of Credit Facility, Remaining capacity to support letters of credit Line of Credit Facility, Remaining capacity to support letters of credit Unsecured surety bonds in force Guarantor Obligations, Current Carrying Value Accounting Policies [Abstract] Significant Accounting Policies [Text Block] Significant Accounting Policies [Text Block] Balance Sheet Related Disclosures [Abstract] Certain Balance Sheet Components [Text Block] Supplemental Balance Sheet Disclosures [Text Block] Segment Reporting [Abstract] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Consolidation Items [Axis] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Corporate Unallocated [Member] Corporate, Non-Segment [Member] Segments [Axis] Segments [Domain] Electricity Operating Segment [Member] Electricity Operating Segment [Member] Electricity Operating Segment Gas Operating Segment [Member] Gas Operating Segment [Member] Gas Operating Segment [Member] Water Operating Segment [Member] Water Operating Segment [Member] Networks Operating Segment [Member] Networks Operating Segment [Member] Networks Operating Segment [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Sales Revenue, Goods, Net Sales Revenue, Goods, Net Sales Revenue, Services, Net Sales Revenue, Services, Net Revenues Revenue, Net Gross profit Gross Profit Operating Income (Loss) Operating Income (Loss) Total other income (expense) Nonoperating Income (Expense) Income Before Income Taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Number of Reportable Segments Number of Reportable Segments Segments [Axis] Segments [Domain] Water Operating Segment [Member] Unusual or Infrequent Item, or Both [Axis] Unusual or Infrequent Item, or Both [Axis] Unusual or Infrequent Item, or Both [Domain] Unusual or Infrequent Item, or Both [Domain] Insurance Recovery, net of tax [Member] Insurance Recovery, net of tax [Member] Insurance Recovery, net of tax [Member] Gross Profit [Member] Gross Profit [Member] Gross Profit [Member] Concentration Risk, Supplier Concentration Risk, Supplier Unusual or Infrequent Item, or Both, Insurance Proceeds Unusual or Infrequent Item, or Both, Insurance Proceeds Earnings (loss) per common share - Basic Earnings Per Share, Basic Earnings (loss) per common share - Diluted Earnings Per Share, Diluted Revenues [Abstract] Revenue from Contract with Customer [Text Block] Revenue from Contract with Customer [Text Block] Intangible Assets [Abstract] The line item is inclusive of finite-lived and indefinite-lived intangible assets. 2018 (amount remaining at March 31, 2018) Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year 2019 Finite-Lived Intangible Assets, Amortization Expense, Year Two 2020 Finite-Lived Intangible Assets, Amortization Expense, Year Three 2021 Finite-Lived Intangible Assets, Amortization Expense, Year Four 2022 Finite-Lived Intangible Assets, Amortization Expense, Year Five Beyond 2022 Finite-Lived Intangible Assets, Amortization Expense, after Year Five Total intangible assets subject to amortization (accretion) Finite-Lived Intangible Assets, Net 2018 (amount remaining at March 31, 2018) Finite-Lived Intangible Liabilities, Accretion, Remainder of Fiscal Year Finite-Lived Intangible Liabilities, Accretion, Remainder of Fiscal Year 2019 Finite-Lived Intangible Liabilities, Accretion, Year Two Finite-Lived Intangible Liabilities, Accretion, Year Two 2020 Finite-Lived Intangible Liabilities, Accretion, Year Three Finite-Lived Intangible Liabilities, Accretion, Year Three 2021 Finite-Lived Intangible Liabilities, Year Four Finite-Lived Intangible Liabilities, Year Four 2022 Finite-Lived Intangible Liabilities, Accretion, Year Five Finite-Lived Intangible Liabilities, Accretion, Year Five Beyond 2022 Finite-Lived Intangible Liabilities, Accretion, after Year Five Finite-Lived Intangible Liabilities, Accretion, after Year Five Finite-Lived Intangible Liabilities, Net Finite-Lived Intangible Liabilities, Net Finite-Lived Intangible Liabilities, Net 2018 (amount remaining at March 31, 2018) Finite-Lived Intangible Assets, Amortization Expense, Net, Remainder of Fiscal Year Finite-Lived Intangible Assets, Amortization Expense, Net, Remainder of Fiscal Year 2019 Finite-Lived Intangible Assets, Amortization Expense, Net, Year Two Finite-Lived Intangible Assets, Amortization Expense, Net, Year Two 2020 Finite-Lived Intangible Assets, Amortization Expense, Net, Year Three Finite-Lived Intangible Assets, Amortization Expense, Net, Year Three 2021 Finite-Lived Intangible Assets, Amortization Expense, Net, Year Four Finite-Lived Intangible Assets, Amortization Expense, Net, Year Four 2022 Finite-Lived Intangible Assets, Amortization Expense, Net, Year Five Finite-Lived Intangible Assets, Amortization Expense, Net, Year Five Beyond 2022 Finite-Lived Intangible Assets, Amortization Expense, Net, After Year Five Finite-Lived Intangible Assets, Amortization Expense, Net, After Year Five Total intangible assets subject to amortization (accretion) Finite-Lived Intangible Assets (Liabilities), Net Finite-Lived Intangible Assets (Liabilities), Net Schedule of Restructuring and Related Costs [Table] Schedule of Restructuring and Related Costs [Table] Corporate, Non-Segment [Member] Restructuring Cost and Reserve [Axis] Restructuring Type [Axis] Type of Restructuring [Domain] Type of Restructuring [Domain] Employee Severance [Member] Employee Severance [Member] Asset Impairment and Net (Gain) Loss on Sale or Disposal [Member] Asset Impairment and Net (Gain) Loss on Sale or Disposal [Member] Asset Impairment and Net (Gain) Loss on Sale or Disposal [Member] Other Restructuring [Member] Other Restructuring [Member] Restructuring Plan [Axis] Restructuring Plan [Axis] Restructuring Plan [Domain] Restructuring Plan [Domain] 2016 Projects [Member] 2016 Projects [Member] 2016 Projects [Member] Restructuring Cost and Reserve [Line Items] Restructuring Cost and Reserve [Line Items] Restructuring and Related Cost, Expected Cost Restructuring and Related Cost, Expected Cost Restructuring and Related Cost, Cost Incurred to Date Restructuring and Related Cost, Cost Incurred to Date Restructuring Restructuring Charges Remaining Costs to be Recognized at Period End Restructuring and Related Cost, Expected Cost Remaining US Employee Group Health Insurance Expense Other Labor-related Expenses Schedule of Line of Credit Facilities [Table Text Block] Schedule of Line of Credit Facilities [Table Text Block] Schedule of Warranty Accruals [Table Text Block] Schedule of Product Warranty Liability [Table Text Block] Warranty Expense [Table Text Block] Warranty Expense [Table Text Block] Warranty Expense [Table Text Block] Schedule of Changes to Unearned Revenue for Extended Warranty [Table Text Block] Schedule of Changes to Unearned Revenue for Extended Warranty [Table Text Block] Health Benefit Plan Costs and Incurred But Not Reported Accrual Balance [Table Text Block] Health Benefit Plan Costs and Incurred But Not Reported Accrual Balance [Table Text Block] Health Benefit Plan Costs and Incurred But Not Reported Accrual Balance [Table Text Block] Accounts Receivable, Net [Table Text Block] Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Allowance for Credit Losses on Financing Receivables [Table Text Block] Inventories [Table Text Block] Schedule of Inventory, Current [Table Text Block] Property, Plant, and Equipment, Net [Table Text Block] Property, Plant and Equipment [Table Text Block] Depreciation Expense [Table Text Block] Depreciation Expense [Table Text Block] Summary of Depreciation Expense [Table Text Block] Income Statement [Abstract] Cost of Goods Sold Cost of Goods Sold Cost of Services Cost of Services Cost of revenues Cost of Goods and Services Sold Gross profit Operating expenses Operating Expenses [Abstract] Sales and marketing Selling and Marketing Expense Product development Research and Development Expense General and administrative General and Administrative Expense Amortization of intangible assets Amortization of Intangible Assets Goodwill impairment Goodwill, Impairment Loss Total operating expenses Operating Expenses Operating income (loss) Other income (expense) Nonoperating Income (Expense) [Abstract] Interest income Interest Income, Other Interest expense Interest Expense Other income (expense), net Other Nonoperating Income (Expense) Total other income (expense) Income (loss) before income taxes Income tax benefit (provision) Income Tax Expense (Benefit) Net income (loss) Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net income attributable to noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest Net income (loss) attributable to Itron, Inc. Net Income (Loss) Attributable to Parent Weighted average common shares outstanding - Basic Weighted Average Number of Shares Outstanding, Basic Weighted average common shares outstanding - Diluted Weighted Average Number of Shares Outstanding, Diluted Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract] Fair Values of Financial Instruments [Text Block] Fair Value Disclosures [Text Block] Statement of Financial Position [Abstract] ASSETS Assets, Current [Abstract] Assets, Current [Abstract] Accounts receivable, net Inventories Inventory, Net Other current assets Other Assets, Current Total current assets Assets, Current Property, plant, and equipment, net Property, Plant and Equipment, Net Deferred tax assets, net Deferred Tax Assets, Net of Valuation Allowance, Noncurrent Restricted Cash, Noncurrent Restricted Cash, Noncurrent Other long-term assets Other Assets, Noncurrent Intangible assets, net Intangible Assets, Net (Excluding Goodwill) Goodwill Goodwill Total assets Assets LIABILITIES AND EQUITY Liabilities and Equity [Abstract] Liabilities, Current [Abstract] Liabilities, Current [Abstract] Accounts payable Accounts Payable, Current Other current liabilities Other Liabilities, Current Wages and benefits payable Employee-related Liabilities, Current Taxes payable Taxes Payable, Current Current portion of debt Long-term Debt, Current Maturities Current portion of warranty Standard Product Warranty Accrual, Current Unearned revenue Deferred Revenue, Current Total current liabilities Liabilities, Current Long-term debt Long-term Debt, Excluding Current Maturities Long-term warranty Standard Product Warranty Accrual, Noncurrent Pension benefit obligation Liability, Defined Benefit Pension Plan, Noncurrent Deferred tax liabilities, net Deferred Tax Liabilities, Net, Noncurrent Other long-term obligations Other Liabilities, Noncurrent Total liabilities Liabilities Commitments and contingencies (Note 11) Commitments and Contingencies Equity Stockholders' Equity Attributable to Parent [Abstract] Preferred stock, no par value, 10 million shares authorized, no shares issued or outstanding Preferred Stock, Value, Issued Common stock, no par value, 75 million shares authorized, 39,181 and 38,771 shares issued and outstanding Common Stock, Value, Issued Accumulated other comprehensive loss, net Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated deficit Retained Earnings (Accumulated Deficit) Total Itron, Inc. shareholders' equity Stockholders' Equity Attributable to Parent Noncontrolling interests Stockholders' Equity Attributable to Noncontrolling Interest Total equity Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Total liabilities and equity Liabilities and Equity Share-based Compensation, Allocation and Classification in Financial Statements [Abstract] Stock-Based Compensation [Text Block] Disclosure of Compensation Related Costs, Share-based Payments [Text Block] 2014 Project [Member] 2014 Project [Member] 2014 Project [Member] Restructuring Reserve, Current Restructuring Reserve, Current Restructuring Reserve, Noncurrent Restructuring Reserve, Noncurrent Contract with Customer, Asset, Gross Contract with Customer, Asset, Gross Contract with Customer, Liability Contract with Customer, Liability Revenue, Initial Application Period Cumulative Effect Transition [Table] Revenue, Initial Application Period Cumulative Effect Transition [Table] Initial Application Period Cumulative Effect Transition [Axis] Initial Application Period Cumulative Effect Transition [Axis] Initial Application Period Cumulative Effect Transition [Domain] Initial Application Period Cumulative Effect Transition [Domain] Difference between Revenue Guidance in Effect before and after Topic 606 [Member] Difference between Revenue Guidance in Effect before and after Topic 606 [Member] Revenue, Initial Application Period Cumulative Effect Transition [Line Items] Revenue, Initial Application Period Cumulative Effect Transition [Line Items] Deferred Revenue Deferred Revenue Deferred Revenue, Current Retained Earnings (Accumulated Deficit) Accounting Changes and Error Corrections [Abstract] New Accounting Pronouncements or Change in Accounting Principle [Table] New Accounting Pronouncements or Change in Accounting Principle [Table] Senior Notes [Member] Senior Notes [Member] Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Type of Adoption [Domain] Type of Adoption [Domain] Accounting Standards Update 2014-09 [Member] Accounting Standards Update 2014-09 [Member] Accounting Standards Update 2016-16 [Member] Accounting Standards Update 2016-16 [Member] New Accounting Pronouncements or Change in Accounting Principle [Line Items] New Accounting Pronouncements or Change in Accounting Principle [Line Items] Cumulative Effect of New Accounting Principle in Period of Adoption Cumulative Effect of New Accounting Principle in Period of Adoption Debt Instrument, Interest Rate, Stated Percentage Debt Instrument, Interest Rate, Stated Percentage Property, Plant and Equipment, Net [Abstract] Machinery and equipment Machinery and Equipment, Gross(1) Amount before accumulated depreciation of tangible personal property used to produce goods and services, including, but is not limited to, tools, dies and molds, and other machinery and equipment used in the production of goods and services. Computers and software Computers and Software, Gross Amount before depreciation of computers and software. Buildings, furniture, and improvements Buildings, furniture, and improvements Amount before depreciation of building, furniture, and improvements. Land Land Construction in progress, including purchased equipment Construction in Progress, Gross Total cost Property, Plant and Equipment, Gross Accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Property, plant, and equipment, net Beginning balance Allowance for Doubtful Accounts Receivable, Current Provision for Doubtful Accounts Provision for Doubtful Accounts Accounts written-off Allowance for Doubtful Accounts Receivable, Write-offs EffectsOfChangeInExchangeRates EffectsOfChangeInExchangeRates The increase (decrease) in the allowance for doubtful accounts receivable due to the effect of exchange rate changes on balances held in foreign currencies. Ending balance Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Comverge [Member] Comverge [Member] Comverge [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] Revenue, Net Business Acquisition, Pro Forma Revenue Business Acquisition, Pro Forma Revenue Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Business Acquisition, Pro Forma Net Income (Loss) Business Acquisition, Pro Forma Net Income (Loss) Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual Schedule of Fair Values Of Financial Instruments by Balance Sheet Grouping [Table Text Block] Fair Value, by Balance Sheet Grouping [Table Text Block] Income Tax Disclosure [Abstract] Income Taxes [Text Block] Income Tax Disclosure [Text Block] 2018 Projects [Member] 2018 Projects [Member] 2018 Projects [Member] Other Comprehensive Income Location [Axis] Other Comprehensive Income Location [Axis] Other Comprehensive Income Location [Domain] Other Comprehensive Income Location [Domain] Restructuring and Related Cost, Expected Cost Remaining Revenue Recognition, Policy [Policy Text Block] Revenue Recognition, Policy [Policy Text Block] Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] New Accounting Pronouncements [Text Block] New Accounting Pronouncements and Changes in Accounting Principles [Text Block] Vesting [Axis] Vesting [Axis] Vesting [Domain] Vesting [Domain] Expected to Vest [Member] Expected to Vest [Member] Shares not vested, but expected to vest. Employee Stock [Member] Employee Stock Option [Member] [Line Items] Outstanding, beginning balance, Number Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Outstanding, beginning balance, Weighted Average Exercise Price Per Share Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Outstanding, beginning balance, Aggregate Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Shares converted upon acquisition, number Share-based Compensation Arrangement by Share-based Payment Award, Options, Shares Converted Upon Acquisition Share-based Compensation Arrangement by Share-based Payment Award, Options, Shares Converted Upon Acquisition Shares converted upon acquisition, Weighted Average Exercise Price Share-based Compensation Arrangements by Share-based Payment Award, Options, Shares Converted Upon Acquisition, Weighted Average Exercise Price Share-based Compensation Arrangements by Share-based Payment Award, Options, Shares Converted Upon Acquisition, Weighted Average Exercise Price Shares converted upon acquisition, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Shares Converted Upon Acquisition, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Shares Converted Upon Acquisition, Weighted Average Grant Date Fair Value Options granted, number Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Granted, Weighted Average Exercise Price Per Share Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Granted, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Exercised, Number Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Exercised, Weighted Average Exercise Price Per Share Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Exercised, Aggregate Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested Options Forfeited, Number of Shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested Options Forfeited, Number of Shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested Options Forfeited, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested Options Forfeited, Weighted Average Grant Date Fair Value Expired, Number Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period Expired, Weighted Average Exercise Price Per Share Share-based Compensation Arrangements by Share-based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price Outstanding, ending balance, Number Outstanding, ending balance, Weighted Average Exercise Price Per Share Outstanding, ending balance, Aggregate Intrinsic Value Exercisable, Number Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Exercisable, Weighted Average Exercise Price Per Share Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Exercisable, Weighted Average Remaining Contractual Term Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Exercisable, Aggregate Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Statement of Cash Flows [Abstract] Operating activities Net Cash Provided by (Used in) Operating Activities [Abstract] Net income (loss) Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation and amortization Depreciation, Depletion and Amortization Stock-based compensation Share-based Compensation Amortization of prepaid debt fees Amortization of Debt Issuance Costs Deferred taxes, net Increase (Decrease) in Deferred Income Taxes Restructuring, non-cash Restructuring Costs Other adjustments, net Other Noncash Income (Expense) Changes in operating assets and liabilities, net of acquisitions: Increase (Decrease) in Operating Capital [Abstract] Accounts receivable Increase (Decrease) in Accounts Receivable Inventories Increase (Decrease) in Inventories Other current assets Increase (Decrease) in Other Current Assets Other long-term assets Increase (Decrease) in Other Noncurrent Assets Accounts payable, other current liabilities, and taxes payable Increase (Decrease) in Accounts Payable and Accrued Liabilities Wages and benefits payable Increase (Decrease) in Employee Related Liabilities Unearned revenue Increase (Decrease) in Deferred Revenue Warranty Warranty Total increases (decreases) in estimated warranty claims based on historical and projected product performance trends and costs. Other operating, net Increase (Decrease) in Other Operating Assets and Liabilities, Net Net cash provided by (used in) operating activities Net Cash Provided by (Used in) Operating Activities Investing activities Net Cash Provided by (Used in) Investing Activities [Abstract] Acquisitions of property, plant, and equipment Payments to Acquire Property, Plant, and Equipment Business acquisitions, net of cash equivalents acquired Payments to Acquire Businesses, Net of Cash Acquired Other investing, net Payments for (Proceeds from) Other Investing Activities Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities, Continuing Operations Financing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Proceeds from borrowings Proceeds from Long-term Lines of Credit Payments on debt Repayments of Long-term Debt Issuance of common stock Proceeds from Issuance of Common Stock Payments of Debt Issuance Costs Payments of Debt Issuance Costs Repurchase of common stock Payments for Repurchase of Common Stock Other financing, net Proceeds from (Payments for) Other Financing Activities Net cash provided by (used in) financing activities Net Cash Provided by (Used in) Financing Activities, Continuing Operations Effect of foreign exchange rate changes on cash, cash equivalents, and restricted cash Effect of Exchange Rate on Cash and Cash Equivalents Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect Cash, cash equivalents, and restricted cash at end of period Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Non-cash transactions: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Property, plant, and equipment purchased but not yet paid Noncash or Part Noncash Acquisition, Fixed Assets Acquired Supplemental disclosure of cash flow information: Supplemental Cash Flow Information [Abstract] Income taxes, net Income Taxes Paid, Net Interest Interest Paid, Net Schedule of Goodwill [Table] Schedule of Goodwill [Table] Networks Operating Segment [Member] Networks Operating Segment [Member] [Member] Networks Operating Segment [Member] [Member] Goodwill [Line Items] Goodwill [Line Items] Goodwill [Roll Forward] Goodwill [Roll Forward] Goodwill before impairment, at beginning of period Goodwill, Gross Accumulated impairment losses, at beginning of period Goodwill, Impaired, Accumulated Impairment Loss Goodwill, net, at beginning of period Goodwill acquired Goodwill, Acquired During Period Goodwill, Purchase Accounting Adjustments Goodwill, Purchase Accounting Adjustments Effect of change in exchange rates Goodwill, Foreign Currency Translation Gain (Loss) Goodwill before impairment, at end of period Accumulated impairment losses, at end of period Goodwill, net, at end of period Credit Facility Additional Information [Abstract] Credit Facility Additional Information [Abstract] Schedule of Long-term Debt Instruments [Table] Variable Rate [Axis] Variable Rate [Axis] Interest Rate, Type [Domain] Variable Rate [Domain] London Interbank Offered Rate (LIBOR) [Member] London Interbank Offered Rate (LIBOR) [Member] EURIBOR [Member] EURIBOR [Member] EURIBOR Euro Interbank Offered Rate [Member] Alternate base rate (1) [Member] Alternate base rate (1) [Member] The first of three alternate base rates under a credit facility agreement. Alternate base rate (2) [Member] Alternate base rate (2) [Member] The second of three alternate base rates under a credit facility agreement. Alternate base rate (3) [Member] Alternate base rate (3) [Member] The third of three alternate base rates under a credit facility agreement. Alternate base rate [Member] Alternate base rate [Member] Alternate base rate [Member] Range [Axis] Range [Domain] Minimum [Member] Minimum [Member] Maximum [Member] Swingline sub-facility [Member] Revolving Credit Facility [Member] Standby Letters of Credit [Member] Standby Letters of Credit [Member] Secured Debt [Member] Secured Debt [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Debt Instrument, Face Amount Debt Instrument, Face Amount Line of Credit Facility, Maximum Borrowing Capacity Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Debt Instrument, Collateral Debt Instrument, Collateral Debt Instrument, Description of Variable Rate Basis Debt Instrument, Description of Variable Rate Basis Debt Instrument, Basis Spread on Variable Rate Debt Instrument, Basis Spread on Variable Rate Applicable Interest Rate Debt Instrument, Interest Rate, Effective Percentage Line of credit facility, amount outstanding Letters of Credit Outstanding, Amount Senior Note Additional Information [Abstract] Senior Note Additional Information [Abstract] Schedule of Long-term Debt Instruments [Table] Range [Axis] Range [Domain] Maximum [Member] Debt Instrument, Redemption, Period [Axis] Debt Instrument, Redemption, Period [Axis] Debt Instrument, Redemption, Period [Domain] Debt Instrument, Redemption, Period [Domain] Debt Instrument, Redemption, Period One [Member] Debt Instrument, Redemption, Period One [Member] Debt Instrument, Redemption, Period Two [Member] Debt Instrument, Redemption, Period Two [Member] Debt Instrument, Redemption, Period Three [Member] Debt Instrument, Redemption, Period Three [Member] Debt Instrument, Redemption, Period Four [Member] Debt Instrument, Redemption, Period Four [Member] Debt Instrument, Redemption Price, Percentage Debt Instrument, Redemption Price, Percentage Debt Instrument, Redemption, Description Debt Instrument, Redemption, Description Restructuring Project [Table] Restructuring Project [Table] Restructuring Project [Table] Restructuring Project [Line Items] Restructuring Project [Line Items] [Line Items] for Restructuring Project [Table] Restructuring and Related Costs [Table Text Block] Restructuring and Related Costs [Table Text Block] Schedule of Restructuring Reserve by Type of Cost [Table Text Block] Schedule of Restructuring Reserve by Type of Cost [Table Text Block] Stock-Based Compensation Expense and Related Tax Benefit [Table Text Block] Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Table Text Block] Employee Stock Options Activity [Table Text Block] Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block] Stock Options, Valuation Assumptions [Table Text Block] Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Restricted Stock Units Award Activity [Table Text Block] Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block] Restricted Stock Units, Valuation Assumptions Schedule of Share-based Payment Award, Restricted Stock Units, Valuation Assumptions [Table Text Block] Tabular disclosure of the significant assumptions used during the year to estimate the fair value of restricted stock units, including, but not limited to: (a) expected term of stock units, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. Schedule of Other Share-based Compensation, Activity [Table Text Block] Schedule of Other Share-based Compensation, Activity [Table Text Block] Equity [Abstract] Preferred Stock, Shares Authorized Preferred Stock, Shares Authorized Preferred Stock, Shares Issued Preferred Stock, Shares Issued Preferred Stock, Shares Outstanding Preferred Stock, Shares Outstanding Preferred Stock, No Par Value Preferred Stock, No Par Value Cash and Cash Equivalents [Abstract] Restrictions on Cash and Cash Equivalents [Table] Restrictions on Cash and Cash Equivalents [Table] Restricted Cash and Cash Equivalents [Axis] Restricted Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Domain] Cash and Cash Equivalents [Domain] Restricted Cash and Cash Equivalents Items [Line Items] Restricted Cash and Cash Equivalents Items [Line Items] Restricted Cash, Current Restricted Cash, Current Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents SIlver Spring Networks, Inc. [Member] SIlver Spring Networks, Inc. [Member] SIlver Spring Networks, Inc. [Member] Additions Charged to Costs and Expenses [Member] Additions Charged to Costs and Expenses [Member] Additions Charged to Costs and Expenses [Member] Ownership [Axis] Ownership [Axis] Ownership [Domain] Ownership [Domain] Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] Business Combination, Consideration Transferred, Other Business Combination, Consideration Transferred, Other Cash Acquired from Acquisition Cash Acquired from Acquisition Payments to Acquire Businesses, Gross Payments to Acquire Businesses, Gross Business Acquisition, Equity Interest Issued or Issuable, Value Assigned Business Acquisition, Equity Interest Issued or Issuable, Value Assigned Estimated time in months to complete in process research and development Estimated time in months to complete in process research and development Estimated time in months to complete in process research and development Estimated cost to complete in process research and development projects Estimated cost to complete in process research and development projects Estimated cost to complete in process research and development (IPR&D) projects Business Acquisition, Transaction Costs Business Combination, Acquisition Related Costs Business Combination, Integration Related Costs Business Combination, Integration Related Costs Intangible Assets [Text Block] Intangible Assets Disclosure [Text Block] Debt Disclosure [Abstract] Debt [Text Block] Debt Disclosure [Text Block] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Table] Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Table] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items] Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] Derivative Instrument Detail [Abstract] Statement [Table] Statement [Table] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Accumulated Net Gain (Loss) from Derivative and Nonderivative Instruments Designated as Hedging Instruments [Member] Accumulated Net Gain (Loss) from Derivative and Nonderivative Instruments Designated as Hedging Instruments [Member] Changes to accumulated comprehensive income resulting from gains and losses from derivative and nonderivative instruments designated as hedging instruments. Statement [Line Items] Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning of Period Unrealized gain (loss) on derivative instruments Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax Realized losses reclassified into net income (loss) Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax Accumulated Other Comprehensive Income (Loss), Net of Tax, End of Period Stockholders' Equity Note Disclosure [Text Block] Stockholders' Equity Note Disclosure [Text Block] Beginning balance Standard and Extended Product Warranty Accrual Assumed liabilities from acquisition Assumed liabilities from acquisition Assumed liabilities from acquisition New product warranties Standard Product Warranty Accrual, Increase for Warranties Issued Other changes/adjustments to warranties Standard and Extended Product Warranty Accrual, Increase (Decrease) for Preexisting Warranties Claims activity Standard and Extended Product Warranty Accrual, Decrease for Payments Effect of change in exchange rates Standard and Extended Product Warranty Accrual, Foreign Currency Translation Gain (Loss) Ending balance Less: current portion of warranty Product Warranty Accrual, Current Long-term warranty Product Warranty Accrual, Noncurrent Statement of Comprehensive Income [Abstract] Other comprehensive income, net of tax: Other Comprehensive Income (Loss), Net of Tax [Abstract] Foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Net unrealized gain (loss) on derivative instruments, designated as cash flow hedges Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax Pension benefit obligation adjustment Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax Total other comprehensive income, net of tax Other Comprehensive Income (Loss), Net of Tax Total comprehensive income (loss), net of tax Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Comprehensive income attributable to noncontrolling interests, net of tax Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Comprehensive income (loss) attributable to Itron, Inc. Comprehensive Income (Loss), Net of Tax, Attributable to Parent Schedule of Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Core-developed technology [Member] Developed Technology Rights [Member] Customer contracts and relationships [Member] Customer Relationships [Member] Trademarks and trade names [Member] Trademarks and Trade Names [Member] Other Intangible Assets [Member] Other Intangible Assets [Member] In Process Research and Development [Member] In Process Research and Development [Member] Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Gross Assets Accumulated Amortization Finite-Lived Intangible Assets, Accumulated Amortization Net Assets Intangible Assets, Net (Excluding Goodwill) Finite-Lived Intangible Liabilities, Accumulated Accretion Finite-Lived Intangible Liabilities, Accumulated Accretion Finite-Lived Intangible Liabilities, Accumulated Accretion Finite-Lived Intangible Liabilities, Net Business Combinations, Preliminary Allocation of Purchase Price [Abstract] Business Combinations, Preliminary Allocation of Purchase Price [Abstract] Schedule of Business Acquisitions, by Acquisition [Table Text Block] Schedule of Business Acquisitions, by Acquisition [Table Text Block] Major Customers, by Reporting Segments [Table] Schedule of Revenue by Major Customers, by Reporting Segments [Table] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Revenue [Member] Sales [Member] Customer [Axis] Customer [Axis] Customer [Domain] Customer [Domain] Threshold for Reporting Customer Concentration [Member] Threshold for Reporting Customer Concentration [Member] The threshold for reporting customer concentration. For any customer that meets or exceeds this threshold, the percentage of concentration with the given customer or customers is provided. Customer A [Member] Customer A [Member] Customer A, for the given filing. This member is exclusive of previous filings (that is, this customer A is not necessarily the same customer A as in previous filings). Customer B [Member] Customer B [Member] Customer B [Member] Customer B, for the given filing. This member is exclusive of previous filings (that is, this customer B is not necessarily the same customer B as in previous filings). Customer C [Member] Customer C [Member] Customer C [Member] Customer C, for the given filing. This member is exclusive of previous filings (that is, this customer C is not necessarily the same customer C as in previous filings). Revenue, Major Customer [Line Items] Revenue, Major Customer [Line Items] Segment Reporting, Disclosure of Major Customers Segment Reporting, Disclosure of Major Customers Concentration Risk, Percentage Concentration Risk, Percentage Core Developed Technology [Member] Core Developed Technology [Member] Core Developed Technology [Member] Customer Contracts And Relationships [Member] Customer Contracts And Relationships [Member] Customer Contracts And Relationships [Member] Trademarks and Trade Names [Member] Business Combination, Current Assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets Business Combination, Property, Plant, and Equipment Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Business Combination, Other Noncurrent Assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets Business Combination, Intangibles Assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles Acquired Intangible Assets, Weighted Average Useful Life Acquired Finite-lived Intangible Assets, Weighted Average Useful Life Business Combination, Intangible Assets, Other than Goodwill Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill Business Acquisition, Transaction Costs Business Acquisition, Transaction Costs Business Combination, Current Liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities Acquired Finite-lived Intangible Liabilities, Weighted Average Useful Life Acquired Finite-lived Intangible Liabilities, Weighted Average Useful Life Acquired Finite-lived Intangible Liabilities, Weighted Average Useful Life Business Combination, Noncurrent Liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities Business Combination, Goodwill, and Liabilities Assumed, Net Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net Offsetting Derivative Assets [Abstract] Gross Amounts of Recognized Assets Presented in the Consolidated Balance Sheets Derivative Asset, Fair Value, Gross Asset Derivative Financial Instruments Not Offset in the Consolidated Balance Sheets Derivative Asset, Fair Value, Amount Not Offset Against Collateral Cash Collateral Received Not Offset in the Consolidated Balance Sheets Derivative, Collateral, Obligation to Return Cash Derivative Asset, Fair Value, Amount Offset Against Collateral Stock-based Compensation Expense by Plan Type [Table] Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Stock options Stock or Unit Option Plan Expense Restricted stock units Restricted Stock or Unit Expense Unrestricted stock awards Unrestricted Stock Awards Compensation Expense The noncash expense that represents the cost of unrestricted stock distributed to board of directors as a portion of their compensation. Phantom stock units Allocated Share-based Compensation Expense Total stock-based compensation Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost Related tax benefit Employee Service Share-based Compensation, Tax Benefit from Compensation Expense Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Outstanding, beginning balance, Number Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Shares converted upon acquisition, number Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Shares Converted Upon Acquisition Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Shares Converted Upon Acquisition Shares converted upon acquisition, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Shares Converted Upon Acquisition, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Shares Converted Upon Acquisition, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Outstanding, ending balance, Number Effect of Cash Flow Derivatives on the Balance Sheet and Income Statement, Before Tax [Table] Statement [Line Items] Derivative Instruments Designated as Hedging Instruments [Abstract] Interest Rate Derivatives [Abstract] Amount of Gain (Loss) Recognized in OCI on Derivative (Effective Portion) Unrealized Gain (Loss) on Interest Rate Cash Flow Hedges, Pretax, Accumulated Other Comprehensive Income (Loss) Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion) Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax Gain (Loss) Recognized in Income on Derivative (Ineffective Portion) Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net Income Tax Uncertainties [Abstract] Unrecognized Tax Benefits Related To Uncertain Tax Positions [Table Text Block] Summary of Income Tax Contingencies [Table Text Block] Stock Repurchase Program, Authorized Amount Stock Repurchase Program, Authorized Amount Stock Repurchased During Period, Shares Stock Repurchased During Period, Shares Contract with Customer, Asset and Liability [Table Text Block] Contract with Customer, Asset and Liability [Table Text Block] Consolidated Balance Sheet Parenthetical [Abstract] Consolidated Balance Sheet Parenthetical [Abstract] Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Common Stock, No Par Value Common Stock, No Par Value Common Stock, Shares Authorized Common Stock, Shares Authorized Common Stock, Shares, Issued Common Stock, Shares, Issued Common Stock, Shares, Outstanding Common Stock, Shares, Outstanding Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract] Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract] Stock-based awards excluded from diluted EPS calculation (antidilutive) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Business Acquisition, Pro Forma Information, Nonrecurring Adjustments [Table] Business Acquisition, Pro Forma Information, Nonrecurring Adjustments [Table] Nonrecurring Adjustment [Axis] Nonrecurring Adjustment [Axis] Nonrecurring Adjustment [Domain] Nonrecurring Adjustment [Domain] Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items] Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items] Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Accumulated OCI for Derivative and Nonderivative Instruments Designated as Hedging Instruments, Net of Tax [Table Text Block] Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) [Table Text Block] Offsetting Assets [Table Text Block] Offsetting Assets [Table Text Block] Offsetting Liabilities [Table Text Block] Offsetting Liabilities [Table Text Block] Effect of Cash Flow Derivatives on the Balance Sheet and Income Statement, Before Tax [Table Text Block] Derivative Instruments, Gain (Loss) [Table Text Block] Foreign Exchange Derivatives Not Designated As Hedging Instruments [Table Text Block] Schedule of Other Derivatives Not Designated as Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block] Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract] Plan assets in other long-term assets Assets for Plan Benefits, Defined Benefit Plan Current portion of pension benefit obligation in wages and benefits payable Liability, Defined Benefit Pension Plan, Current Long-term portion of pension benefit obligation Pension benefit obligation, net Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position Restructuring Cost and Reserve [Axis] Accrued Employee Severance [Member] Other Accrued Costs [Member] Beginning balance, January 1, 2018 Restructuring Reserve Costs charged to expense Cash payments Payments for Restructuring Net assets disposed and impaired Restructuring Costs and Asset Impairment Charges Effect of change in exchange rates Restructuring Reserve, Foreign Currency Translation Gain (Loss) Ending balance, March 31, 2018 Goodwill Disclosure [Text Block] Goodwill Disclosure [Text Block] Schedule of Debt [Table Text Block] Schedule of Debt [Table Text Block] Schedule of Maturities of Long-term Debt [Table Text Block] Schedule of Maturities of Long-term Debt [Table Text Block] Property, Plant and Equipment [Abstract] Depreciation expense [Table] Depreciation expense [Table] Depreciation Expense [Table] Depreciation expense [Axis] Depreciation expense [Axis] Depreciation expense [Axis] Depreciation expense [Domain] Depreciation expense [Domain] Depreciation expense [Domain] Depreciation Expense [Line Items] Depreciation Expense [Line Items] Depreciation Expense [Line Items] Depreciation Depreciation Revenues Gross Profit And Operating Income By Segment [Table Text Block] Schedule of Segment Reporting Information, by Segment [Table Text Block] Revenues By Region [Table Text Block] Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block] Depreciation And Amortization Expense Associated With Segments [Table Text Block] Depreciation And Amortization Expense Associated With Segments [Table Text Block] Depreciation And Amortization Expense Associated With Segments [Table Text Block] Commitments and Contingencies [Text Block] Commitments and Contingencies Disclosure [Text Block] Revenues by Region Schedule of Revenues from External Customers and Long-Lived Assets [Table] Statement, Geographical [Axis] Geographical [Axis] Geographical [Domain] United States and Canada [Member] United States and Canada [Member] United States and Canada [Member] Europe, Middle East, and Africa [Member] EMEA [Member] Other [Member] Other Countries [Member] The combined total of all countries outside of the USA, Canada, and Europe, for the purpose of reporting revenue by region. [Member] Revenues from External Customers [Line Items] Revenues from External Customers and Long-Lived Assets [Line Items] General Discussion of Derivative Instruments and Hedging Activities [Abstract] Derivative Financial Instruments [Text Block] Derivative Instruments and Hedging Activities Disclosure [Text Block] Defined Benefit Plan [Abstract] Service cost Defined Benefit Plan, Service Cost Interest cost Defined Benefit Plan, Interest Cost Expected return on plan assets Defined Benefit Plan, Expected Return (Loss) on Plan Assets Settlements and other Defined Benefit Plan, Settlement and Other Benefit Costs Defined benefit plan, settlement and other benefit costs (recoveries of costs) Amortization of actuarial net loss Defined Benefit Plan, Amortization of Gain (Loss) Amortization of unrecognized prior service costs Defined Benefit Plan, Amortization of Prior Service Cost (Credit) Net periodic benefit cost Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Vested and Released [Member] Vested and Released [Member] Vested and Released [Member] Vested but Not Released [Member] Vested but Not Released [Member] Vested but not released due to contractual agreement or statutory requirement. Released, Aggregate Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Vested Forfeited, Number Stock Issued During Period, Shares, Restricted Stock Award, Forfeited Expected to vest, Aggregate Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Nonvested Schedule Of Revenues and Earnings Attributable to an Acquired Business [Table Text Block] Schedule Of Revenues and Earnings Attributable to an Acquired Business [Table Text Block] Schedule Of Revenues and Earnings Attributable to an Acquired Business [Table Text Block] Business Acquisition, Pro Forma Information [Table Text Block] Business Acquisition, Pro Forma Information [Table Text Block] Income Tax Examination [Table] Income Tax Examination [Table] Income Tax Examination [Line Items] Income Tax Examination [Line Items] Effective Income Tax Rate Reconciliation, Percent Effective Income Tax Rate Reconciliation, Percent Unrecognized Tax Benefits Unrecognized Tax Benefits Open Tax Year Open Tax Year Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Before-tax amount [Abstract] Other Comprehensive Income (Loss), before Tax [Abstract] Foreign currency translation adjustment Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax Disposal Group, Including Discontinued Operation, Foreign Currency Translation Gains (Losses) Disposal Group, Including Discontinued Operation, Foreign Currency Translation Gains (Losses) Net unrealized gain (loss) on derivative instruments designated as cash flow hedges Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, before Tax Net hedging (gain) loss reclassified into net income Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment and Tax Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment and Tax Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax Total other comprehensive income (loss), before tax Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent Tax (provision) benefit [Abstract] Tax (provision) benefit [Abstract] Tax (provision) benefit [Abstract] Foreign currency translation adjustment Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax Disposal Group, including discontinued operations, Foreign Currency Translation Gains (Losses), tax (provision) benefit Disposal Group, including discontinued operations, Foreign Currency Translation Gains (Losses), tax (provision) benefit Disposal Group, including discontinued operations, Foreign Currency Translation Gains (Losses), tax (provision) benefit Net unrealized gain (loss) on derivative instruments designated as cash flow hedges Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax Net hedging (gain) loss reclassified into net income Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, Tax Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, Tax Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, Tax Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, Tax Total other comprehensive income (loss) tax benefit Other Comprehensive Income (Loss), Tax Net-of-tax amount [Abstract] Foreign currency translation adjustment Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent Net unrealized gain (loss) on derivative instruments designated as cash flow hedges Net hedging loss (gain) reclassified into net income Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, after Tax Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, after Tax Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, after Tax Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, after Tax Total other comprehensive income (loss), net of tax Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Hedging Designation [Axis] Hedging Designation [Axis] Hedging Designation [Domain] Hedging Designation [Domain] Designated as Hedging Instrument [Member] Designated as Hedging Instrument [Member] Not Designated as Hedging Instrument [Member] Not Designated as Hedging Instrument [Member] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Other Current Assets [Member] Other Current Assets [Member] Other Noncurrent Assets [Member] Other Noncurrent Assets [Member] Other Current Liabilities [Member] Other Noncurrent Liabilities [Member] Other Noncurrent Liabilities [Member] Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Asset Derivatives [Abstract] Derivative Asset [Abstract] Interest Rate Derivative Assets, at Fair Value Interest Rate Derivative Assets, at Fair Value Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Asset at Fair Value Liability Derivatives [Abstract] Derivative Liability [Abstract] Interest rate swap contracts Foreign exchange forward contracts Total liability derivatives Derivative Liability, Fair Value, Gross Liability Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Parent [Member] Parent [Member] Accumulated Translation Adjustment [Member] Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Accumulated Other Comprehensive Income, Net Unrealized Gain (Loss) on Derivative Instruments [Member] Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] Accumulated Other Comprehensive Income, Net Unrealized Gain (Loss) on Nonderivative Instruments [Member] Accumulated Other Comprehensive Income, Net Unrealized Gain (Loss) on Nonderivative Instruments [Member] Accumulated Other Comprehensive Income, Net Unrealized Gain (Loss) on Nonderivative Instruments used as a hedge [Member] Accumulated Defined Benefit Plans Adjustment [Member] Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] OCI before reclassifications Other Comprehensive Income (Loss), before Reclassifications, Net of Tax Amounts reclassified from AOCI Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax Segment Information [Text Block] Segment Reporting Disclosure [Text Block] Inventory, Net [Abstract] Materials Inventory, Raw Materials, Net of Reserves Work in process Inventory, Work in Process, Net of Reserves Finished goods Inventory, Finished Goods, Net of Reserves Total inventories Retirement Benefits, Description [Abstract] Defined Benefit Pension Plans [Text Block] Pension and Other Postretirement Benefits Disclosure [Text Block] Net interest and penalties expense Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense Accrued interest Unrecognized Tax Benefits, Interest on Income Taxes Accrued Accrued penalties Unrecognized Tax Benefits, Income Tax Penalties Accrued Unrecognized tax benefits related to uncertain tax positions The amount of unrecognized tax benefits that, if recognized, would affect our effective tax rate Unrecognized Tax Benefits that Would Impact Effective Tax Rate Goodwill and Intangible Assets Disclosure [Abstract] Finite-Lived Intangible Assets [Line Items] Amortization of Intangible Assets Business Acquisition, Percentage of Voting Interests Acquired Business Acquisition, Percentage of Voting Interests Acquired In process research and development completed In process research and development completed In process research and development completed Net income (loss) available to common shareholders Weighted average common shares outstanding - Basic Dilutive effect of stock-based awards Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Weighted average common shares outstanding - Diluted Depreciation and Amortization Expense, by Segment [Abstract] Depreciation and Amortization Expense, by Segment [Abstract] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] IBNR Accrual Liability for Claims and Claims Adjustment Expense Offsetting Derivative Liabilities [Abstract] Gross Amounts of Recognized Liabilities Presented in the Consolidated Balance Sheets Derivative Liability, Fair Value, Amount Not Offset Against Collateral Derivative Liability, Fair Value, Amount Not Offset Against Collateral Cash Collateral Pledged Not Offset in the Consolidated Balance Sheets Derivative, Collateral, Right to Reclaim Cash Derivative Liability, Fair Value, Amount Offset Against Collateral Total warranty expense Product Warranty Expense Derivative [Table] Derivative [Table] Interest Rate, Type [Axis] Interest Rate, Type [Axis] Interest Rate, Type [Axis] Interest Rate, Type [Domain] Interest Rate, Type [Domain] Interest Rate, Type [Domain] Forward Contracts [Member] Forward Contracts [Member] Foreign Exchange Contract [Member] Foreign Exchange Contract [Member] Derivative Activity Volume Type [Axis] Derivative Activity Volume Type [Axis] Derivative Activity Volume Type [Axis] Derivative Activity Volume Type [Domain] Derivative Activity Volume Type [Domain] [Domain] for Derivative Activity Volume Type [Axis] Number of Counterparties [Member] Number of Counterparties [Member] Number of Counterparties [Member] Total debt Long-term Debt Derivative Counterparties Derivative Counterparties Derivative number of counterparties Net unrealized loss on hedging instruments Description of Derivative Activity Volume Number of Interest Rate Derivatives Held Number of Interest Rate Derivatives Held Derivative, Notional Amount Derivative, Notional Amount Derivative, Cap Interest Rate Derivative, Cap Interest Rate Derivative Purchase Price Derivative Purchase Price Derivative Purchase Price Pay fixed interest rate in interest rate swap Derivative, Fixed Interest Rate Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net Allowance Document Information [Abstract] Document Information [Abstract] Entities [Table] Entities [Table] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] Entity Information [Line Items] Entity Information [Line Items] Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Document Type Document Type Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Amendment Flag Amendment Flag Trading Symbol Trading Symbol Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Voluntary Filers Entity Current Reporting Status Entity Current Reporting Status Schedule of Debt [Table] Debt Instrument, Interest Rate, Effective Percentage Deferred Finance Costs, Noncurrent, Net Debt Issuance Costs, Noncurrent, Net 2018 (amount remaining at March 31, 2018) Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year 2019 Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months 2020 Long-term Debt, Maturities, Repayments of Principal in Year Two 2021 Long-term Debt, Maturities, Repayments of Principal in Year Three 2022 Long-term Debt, Maturities, Repayments of Principal in Year Four 2023 Long-term Debt, Maturities, Repayments of Principal in Year Five Schedule of Amounts Recognized in the Consolidated Balance Sheets [Table Text Block] Schedule of Amounts Recognized in Balance Sheet [Table Text Block] Schedule of Net Periodic Pension Benefit Costs [Table Text Block] Schedule of Net Benefit Costs [Table Text Block]