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Income Taxes - Narrative (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Sep. 30, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Jan. 01, 2018 | Dec. 31, 2015
Income Taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other selling and administrative expenses | $ 398,253 | $ 325,874 | $ 360,000 | $ 424,617 | $ 452,644 | $ 381,214 | $ 353,296 | $ 330,829 | $ 1,065,339 | $ 1,508,744 | $ 1,517,983 | $ 1,391,769 |  |
Loss carryforwards | 662,010 |  |  |  |  |  |  |  |  | 662,010 |  |  |  |
Tax credit carryforwards | 64,857 |  |  |  |  |  |  |  |  | 64,857 |  |  |  |
Unrecognized tax benefits, end of period | 119,818 |  |  |  | 116,070 |  |  |  |  | 119,818 | 116,070 | 109,347 |  | $ 118,099
Amount of unrecognized tax benefits that would impact the effective tax rate if recognized | 81,700 |  |  |  |  |  |  |  |  | 81,700 |  |  |  |
Amount of unrecognized tax benefits that would impact the effective tax rate if recognized and increase the valuation allowance | 38,100 |  |  |  |  |  |  |  |  | 38,100 |  |  |  |
Increase (decrease) in recognized interest and penalties related to unrecognized tax benefits |  |  |  |  |  |  |  |  |  | (8,000) | (2,000) | 2,000 |  |
Accrued interest and penalties related to unrecognized tax benefits | 26,400 |  |  |  | 18,600 |  |  |  |  | 26,400 | 18,600 |  |  |
Unrecognized tax benefits that would impact effective tax rate, interest and penalties |  |  |  |  | 17,700 |  |  |  |  |  | 17,700 |  |  |
Reasonably possible changes to unrecognized tax benefits related to settlement of tax audits and/or expiration of statutes of limitations within the next twelve months | (4,300) |  |  |  |  |  |  |  |  | (4,300) |  |  |  |
Provision for income taxes |  |  |  |  |  | 777,308 |  |  | 728,835 | 116,196 | 553,334 | 89,134 |  |
Tax expense related to change in indefinite reinvestment assertion |  |  |  |  |  |  |  |  |  | 14,566 | 0 | 0 |  |
Tax reconciliation related to accumulated foreign earnings, net of related valuation allowance change |  |  |  |  |  |  |  |  |  | 3,709 | (107,049) | 0 |  |
Net tax expense |  |  |  |  |  |  |  |  |  |  |  | (16,800) |  |
Retained earnings (accumulated deficit) | 1,616,595 |  |  |  | 2,169,002 | 2,343,878 |  |  | $ 2,343,878 | 1,616,595 | 2,169,002 | 3,535,746 |  | $ 3,741,316
Undistributed foreign earnings | $ 4,700,000 |  |  |  |  |  |  |  |  | 4,700,000 |  |  |  |
Valuation Allowance for Other Deferred Tax Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Valuation allowance on deferred tax assets |  |  |  |  |  |  |  |  |  | $ 75,000 |  |  |  |
Accounting Standards Update 2017-07 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other selling and administrative expenses |  |  |  |  | $ (1,800) | $ (500) | $ 300 | $ (1,400) |  |  | $ (3,400) | $ (8,400) |  |
Accounting Standards Update 2016-16 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Retained earnings (accumulated deficit) |  |  |  |  |  |  |  |  |  |  |  |  | $ 9,400 |

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