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Derivative Instruments - Additional Information (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Derivative [Line Items]      
Realized and unrealized gains (losses) on derivatives classified as cash flow hedges recorded in other comprehensive income (loss)   $ (189) $ (51)
Fair value of derivatives under collateral agreements in a net liability position   1,500  
Collateral posted by company netted against net liability position   1,300  
Net Investment Hedging [Member]      
Derivative [Line Items]      
Non-derivative debt instruments designated as net investment hedges   $ 1,400 $ 1,300
Scenario, Forecast [Member]      
Derivative [Line Items]      
Estimated gain to be reclassified from other comprehensive income (loss) into earnings $ (41)