Accumulated Other Comprehensive Income (Loss) (Parenthetical) (Detail) $ in Millions	6 Months Ended
Jun. 30, 2021 USD ($)
Accounting Standards Update 2016-01 [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Foreign currency translation attributable to non-controlling interests	$ 12
Foreign Currency Translation Adjustments Attributable to Non-controlling Interests [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Foreign currency translation attributable to non-controlling interests	$ (68)

Amount after tax of other comprehensive income (loss) attributable to noncontrolling interests.

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