Derivative Instruments and Hedging Activities - Offsetting Assets (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Derivative assets
Derivative assets, gross amount	$ 4,519	$ 2,690
Derivative assets, offsetting financial instruments	(425)	(252)
Derivative assets, offsetting cash collateral	(336)	(290)
Total derivative assets	3,758	2,148
Derivative assets, securities not netted	0	0
Net Exposure	3,758	2,148
Derivative, collateral, obligation to return cash	391	377
Derivative, collateral, obligation to return securities	15	1
Derivative, collateral, right to reclaim cash	$ 3,800	$ 2,000