| Income Taxes - Components of Income Tax Expense (Detail) - USD ($) $ in Millions | 12 Months Ended | ||
|---|---|---|---|
| Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | |
| Current: | |||
| Foreign | $ 121.8 | $ 122.0 | $ 100.6 | 
| Federal | 20.1 | 13.7 | 22.1 | 
| State | 5.0 | 6.1 | 2.3 | 
| Current Income Tax Expense (Benefit), Total | 146.9 | 141.8 | 125.0 | 
| Deferred: | |||
| Foreign | (17.0) | (2.7) | 12.8 | 
| Federal | (16.0) | 3.9 | 1.3 | 
| State | 0.3 | 0.8 | 1.3 | 
| Deferred Income Tax Expense (Benefit), Total | (33.3) | 2.0 | 15.4 | 
| Total | $ 113.6 | $ 143.8 | $ 140.4 | 
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- Definition Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef 
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- Definition Amount of current foreign income tax expense (benefit) pertaining to income (loss) from continuing operations. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef 
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- Definition Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- References No definition available. 
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- Definition Amount of current state and local tax expense (benefit) pertaining to income (loss) from continuing operations. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Amount of deferred federal income tax expense (benefit) pertaining to income (loss) from continuing operations. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef 
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- Definition Amount of deferred foreign income tax expense (benefit) pertaining to income (loss) from continuing operations. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- References No definition available. 
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- Definition Amount of deferred state and local tax expense (benefit) pertaining to income (loss) from continuing operations. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef 
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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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