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Components of Income Tax Expense (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Income Tax Expense Benefit [Line Items] |  |  |
Taxes on income | $ 136.7 | $ 157.6 | $ 168.0
Domestic Tax Authority |  |  |
Income Tax Expense Benefit [Line Items] |  |  |
Current | 111.9 | 120.9 | 94.3
Deferred | 2.0 | 11.1 | 18.3
Domestic | 113.9 | 132.0 | 112.6
U.S. |  |  |
Income Tax Expense Benefit [Line Items] |  |  |
Foreign taxes, Current | 15.3 | 19.9 | 7.6
Foreign taxes, Deferred | 7.5 | 5.7 | 47.8
Foreign | $ 22.8 | $ 25.6 | $ 55.4

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