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Sale of Business - Summary of Gain on the Sale Within Other Expense (Income) (Detail) $ in Millions | 12 Months Ended
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Dec. 31, 2019 USD ($)
Disposal Group, Including Discontinued Operation, Balance Sheet Disclosures [Abstract] |
Proceeds on disposal, net of transaction costs | $ 1,180
Net assets disposed | 656
Gain included in other expense, net | 524
Income taxes | 77
Gain on divestiture, net of tax | $ 447

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