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Financial Statement Information - Additional Information (Details) $ in Thousands |  | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Dec. 01, 2016 USD ($) | Mar. 31, 2019 USD ($) shares | Dec. 31, 2018 USD ($) shares | Jun. 30, 2018 SEK (kr) | Jun. 30, 2018 USD ($) | Mar. 31, 2018 USD ($) | Mar. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) shares | Dec. 31, 2017 | Mar. 31, 2019 SEK (kr) shares | Mar. 31, 2019 USD ($) shares | Jan. 01, 2019 USD ($)
Summary of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Contract with Customer, Refund Liability |  |  | $ 105,000 |  |  |  |  | $ 105,000 |  |  | $ 105,000 |
Net Inventory Held-for-Sale |  |  |  |  |  |  |  |  |  |  | 62,000 |
Goodwill |  |  | 4,381,458 |  |  |  |  | 4,381,458 |  |  | 4,354,306 |
Other intangibles, net |  |  | 928,752 |  |  |  |  | 928,752 |  |  | 889,609 |
Restricted cash included in Other assets |  |  |  |  |  | $ 0 |  |  |  |  | 5,381 |
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Reserve for uncollectible accounts |  |  | 57,000 |  |  |  |  | 57,000 |  |  | 55,000 |
Inventory Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory |  |  | 394,259 |  |  |  |  | 394,259 |  |  |  |
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Equity method investments |  |  | 179,169 |  |  |  |  | 179,169 |  |  | 134,234 |
Derivative Asset, Noncurrent |  |  | 22,636 |  |  |  |  | $ 22,636 |  |  | $ 19,019 |
Equity in (losses) earnings of unconsolidated subsidiaries |  | $ 39,549 |  |  |  | (1,412) |  |  |  |  |  |
Share Price of the Equity Method Investment | kr |  |  |  |  |  |  |  |  |  | kr 65 |  |
Effective Income Tax Rate Reconciliation, Amount [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
U.S. federal statutory rate |  |  |  |  |  |  |  | 21.00% | 35.00% |  |  |
Adoption of ASU 2018-02 (see Note 8) |  |  |  |  |  | 5,345 |  |  |  |  |  |
Stock Repurchase Program, Authorized Amount |  |  | $ 500,000 |  |  |  |  | $ 500,000 |  |  |  |
Stock Repurchased During Period, Shares | shares |  | 2,600,000 |  |  |  |  |  | 2,300,000 |  |  |  |
Treasury Stock, Common, Shares | shares |  |  | 2,271,707 |  |  |  |  | 2,271,707 |  | 4,915,031 | 4,915,031 |
Payments for Repurchase of Common Stock |  | $ (70,462) |  |  |  | 0 |  | $ (60,000) |  |  |  |
Stock Repurchase Program Remaining Authorized Repurchases, Amount |  |  |  |  |  |  |  |  |  |  | $ 370,000 |
Impairment of net assets held for sale |  | 15,023 |  |  |  | 0 |  |  |  |  |  |
Disposal Group, Including Discontinued Operation, Assets |  |  |  |  |  |  |  |  |  |  | 88,000 |
Net Liabilities Held-for-Sale |  |  |  |  |  |  |  |  |  |  | 8,000 |
Contract with Customer, Right to Recover Product |  |  | $ 56,000 |  |  |  |  | $ 56,000 |  |  | $ 56,000 |
Disposal Group, Including Discontinued Operation, Revenue |  |  |  |  |  |  | $ 170,000 |  |  |  |  |
Mekonomen [Member] |  |  |  |  |  |  |  |  |  |  |  |
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  | 26.60% |  |  |  |  | 26.60% |  |  |  |
Revolving Credit Facility [Member] |  |  |  |  |  |  |  |  |  |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Weighted average interest rates |  |  | 1.90% |  |  |  |  | 1.90% |  | 1.80% | 1.80% |
Effective Income Tax Rate Reconciliation, Amount [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Outstanding letters of credit |  |  |  |  |  |  |  |  |  |  | $ 65,000 |
Line of Credit Facility, Remaining Borrowing Capacity |  |  |  |  |  |  |  |  |  |  | 1,700,000 |
ManufacturedProducts [Member] |  |  |  |  |  |  |  |  |  |  |  |
Inventory Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Inventory, Raw Materials and Supplies, Gross |  |  | $ 17,000 |  |  |  |  | $ 17,000 |  |  | 17,000 |
Inventory, Work in Process, Gross |  |  | 2,000 |  |  |  |  | 2,000 |  |  | 2,000 |
Inventory, Finished Goods, Gross |  |  | 4,000 |  |  |  |  | 4,000 |  |  | 6,000 |
Stahlgruber [Member] |  |  |  |  |  |  |  |  |  |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  | 908,253 |  |  |  |  | 908,253 |  |  |  |
Inventory Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory |  |  | 380,238 |  |  |  |  | 380,238 |  |  |  |
Warn Industries [Member] |  |  |  |  |  |  |  |  |  |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Intangibles |  |  |  |  |  |  |  | 5,000 |  |  |  |
Mekonomen [Member] |  |  |  |  |  |  |  |  |  |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Equity Method Investments, Fair Value Disclosure |  |  |  |  |  |  |  |  |  |  | 110,000 |
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Equity Method Investment, Additional Information | December 1, 2016 |  |  |  |  |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage | 26.50% |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated subsidiaries | $ 181,000 |  | 48,000 |  |  |  |  |  |  |  |  |
Equity Method Investment, Difference Between Carrying Amount and Underlying Equity |  |  |  |  |  |  |  |  |  |  | 5,000 |
Equity in (losses) earnings of unconsolidated subsidiaries |  | $ 40,000 |  |  |  | (2,000) |  |  |  |  |  |
Proceeds from Equity Method Investment, Distribution |  |  |  | kr 67,000,000 | $ 8,000 |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) |  |  |  |  |  |  |  |  |  |  |  |
Effective Income Tax Rate Reconciliation, Amount [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Adoption of ASU 2018-02 (see Note 8) |  |  |  |  |  | $ 5,345 |  |  |  |  |  |
Increase to total leased assets [Member] |  |  |  |  |  |  |  |  |  |  |  |
Effective Income Tax Rate Reconciliation, Amount [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Adoption of ASU 2016-02 |  |  |  |  |  |  |  |  |  |  |  | $ 1,300,000
Increase to total liabilities [Member] |  |  |  |  |  |  |  |  |  |  |  |
Effective Income Tax Rate Reconciliation, Amount [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Adoption of ASU 2016-02 |  |  |  |  |  |  |  |  |  |  |  | $ 1,300,000
Europe |  |  |  |  |  |  |  |  |  |  |  |
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Equity method investments |  |  | $ 162,765 |  |  |  |  | $ 162,765 |  |  | 116,683 |
Effective Income Tax Rate Reconciliation, Amount [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Disposal Group, Including Discontinued Operation, Goodwill |  |  |  |  |  |  |  |  |  |  | $ (5,000) |

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