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Derivative Instruments - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Mar. 31, 2021
Dec. 31, 2021
Dec. 31, 2020
Derivative [Line Items]      
Realized and unrealized gains (losses) on derivatives classified as cash flow hedges recorded in other comprehensive income (loss) $ (112)   $ (189)
Fair value of derivatives under collateral agreements in a net liability position 1,000    
Collateral posted by company netted against net liability position 783    
Estimated gain to be reclassified from other comprehensive income (loss) into earnings (31)    
Net Investment Hedging [Member]      
Derivative [Line Items]      
Non-derivative debt instruments designated as net investment hedges $ 1,400   $ 1,400
Scenario, Forecast [Member]      
Derivative [Line Items]      
Estimated gain to be reclassified from other comprehensive income (loss) into earnings   $ (39)