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Derivative Instruments - Additional Information (Details)
3 Months Ended
Mar. 31, 2021
USD ($)
instrument
Mar. 31, 2020
USD ($)
Dec. 31, 2020
USD ($)
Offsetting Liabilities [Line Items]      
Maximum maturity of foreign currency exchange contracts 18 months    
Net derivative gains related to cash flow hedges to be reclassified into earnings within the next 12 months $ (132,000,000)    
Net investment hedge CTA gain 0 $ 71,000,000  
Net investment hedge CTA gains (losses), reclassifications 0 $ 0  
Derivative asset, offset 117,000,000   $ 34,000,000
Derivative liability, offset $ 117,000,000   $ 34,000,000
Net Investment Hedging      
Offsetting Liabilities [Line Items]      
Number of instruments held | instrument 0