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Accumulated Other Comprehensive Income (Loss) (Parenthetical) (Detail) $ in Millions | 6 Months Ended
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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)

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