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Income Taxes - Additional Information (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Income Tax [Line Items] |  |  |
Federal corporate tax | 21.00% | 21.00% | 35.00%
Tax benefit due to effect of reducing the statutory tax rate |  | $ 1,500.0 |
Unremitted earnings | $ 5,400.0 |  |
Operating loss carryforwards | 1,200.0 |  |
Operating loss carryforwards, not subject to expiration | 871.0 |  |
Operating loss carryforwards, subject to expiration | 355.0 |  |
Deferred Tax Assets, Valuation Allowance | 270.5 | 195.0 |
Valuation allowance, deferred tax asset, change in amount | (52.7) |  |
Unrecognized tax benefits that would impact effective tax rate | 437.0 | 444.0 | $ 365.0
Unrecognized tax benefits, income tax penalties and interest expense | 10.6 | 8.0 | $ 8.3
Undistributed Earnings of Foreign Subsidiaries | 6,000.0 |  |
Deferred Tax Liabilities, Undistributed Foreign Earnings | 10.8 |  |
Decrease in Unrecognized Tax Benefits is Reasonably Possible | 66.0 |  |
Minimum |  |  |
Income Tax [Line Items] |  |  |
Potential income tax expense due to change in tax regulation | 180.0 |  |
Maximum |  |  |
Income Tax [Line Items] |  |  |
Potential income tax expense due to change in tax regulation | 220.0 |  |
Operations Deferred Tax Asset Deemed Realizable |  |  |
Income Tax [Line Items] |  |  |
Deferred Tax Assets, Valuation Allowance | 271.0 | 195.0 |
Valuation allowance, deferred tax asset, change in amount | (75.5) | 98.0 |
Operations Deferred Tax Asset Deemed Realizable | FRANCE |  |  |
Income Tax [Line Items] |  |  |
Valuation allowance, deferred tax asset, change in amount |  | $ 64.2 |
Domestic Tax Authority |  |  |
Income Tax [Line Items] |  |  |
Operating loss carryforwards | 257.0 |  |
Operating loss carryforwards, subject to expiration | 614.0 |  |
Operating loss carryforwards, subject to expiration, varying limitations | 135.0 |  |
Operating loss carryforwards excluded from statement of financial condition | 130.0 |  |
Operating loss carryforwards utilized in the current year | 32.0 |  |
Foreign Tax Authority |  |  |
Income Tax [Line Items] |  |  |
Operating loss carryforwards | 969.0 |  |
State Jurisdiction |  |  |
Income Tax [Line Items] |  |  |
Operating loss carryforwards | 387.0 |  |
Operating loss carryforwards, subject to expiration | 1,800.0 |  |
Operating loss carryforwards, subject to expiration, varying limitations | 227.0 |  |
Operating loss carryforwards excluded from statement of financial condition | 227.0 |  |
Operating loss carryforwards utilized in the current year | 11.5 |  |
State Jurisdiction | Carryback 3 years, carryforward 5 years |  |  |
Income Tax [Line Items] |  |  |
Operating loss carryforwards, subject to expiration | 185.0 |  |
State Jurisdiction | Five-year carryforward |  |  |
Income Tax [Line Items] |  |  |
Operating loss carryforwards, subject to expiration | $ 202.0 |  |

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