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Income Taxes - Additional Information (Detail) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Income Tax Disclosure [Abstract] |  |  |  |
Tax benefit adjustment to the provisional income tax expense |  | $ 5.3 |  |
Unrecognized net operating loss carryforwards, foreign | $ 1.8 | 7.1 | $ 11.5 |
Foreign jurisdictions income with tax holidays | 87.0 | 107.1 | 124.1 |
Income Taxes [Line Items] |  |  |  |
Tax credit, research and development | 28.6 |  |  |
Valuation allowance for deferred tax assets | 344.8 | 350.4 |  |
Net decrease in valuation allowance | $ 5.6 |  |  |
Income tax rate deduction dividend percent | 100.00% |  |  |
Tax loss carryforwards | $ 1,800.0 |  |  |
Tax loss carryforwards with no expiration date | 1,500.0 |  |  |
Tax loss carryforwards with expiration date | 265.0 |  |  |
Tax credit carryforwards | 294.0 |  |  |
Deferred tax asset | 477.2 | 445.5 |  |
Retained earnings | 4,715.8 | 4,113.6 |  |
Unrecognized tax benefits | 31.6 | 36.7 | 33.2 | $ 29.5
Unrecognized tax benefits, interest and penalties | 11.5 | 11.8 |  |
Decrease in unrecognized tax benefits, reasonably possible during the next twelve months | 5.8 |  |  |
U.S. |  |  |  |
Income Taxes [Line Items] |  |  |  |
Valuation allowance for deferred tax assets | 11.8 |  |  |
Foreign tax credits | 137.0 |  |  |
Tax credit carryforwards, research | 110.0 |  |  |
International jurisdictions |  |  |  |
Income Taxes [Line Items] |  |  |  |
Valuation allowance for deferred tax assets | 333.0 |  |  |
Tax credit carryforwards, other | 47.0 |  |  |
Accounting Standards Update 2016-16 |  |  |  |
Income Taxes [Line Items] |  |  |  |
Deferred tax asset |  |  | 2.3 |
Retained earnings |  | $ 2.3 |  |
Accounting Standards Update 2016-09 |  |  |  |
Income Taxes [Line Items] |  |  |  |
Deferred tax asset |  |  |  | $ 52.9
Retained earnings |  |  | $ 52.9 |
Other Current Liabilities |  |  |  |
Income Taxes [Line Items] |  |  |  |
Unrecognized tax benefits | 0.7 |  |  |
Other Long-term Liabilities |  |  |  |
Income Taxes [Line Items] |  |  |  |
Unrecognized tax benefits | $ 30.9 |  |  |

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