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Income before Provision for Income Taxes, Classified by Source of Income (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Income Tax Disclosure [Abstract] |  |  |
Document Fiscal Year Focus | 2019 |  |
U.S. | $ 2,159.1 | $ 2,218.0 | $ 2,242.0
Outside the U.S. | 5,859.0 | 5,598.1 | 6,331.5
Income before provision for income taxes | $ 8,018.1 | $ 7,816.1 | $ 8,573.5

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