Derivative Instruments and Hedging Activities - Offsetting Assets (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Derivative assets
Derivative assets, gross amount	$ 2,745	$ 3,098
Derivative assets, offsetting financial instruments	(479)	(759)
Derivative assets, offsetting cash collateral	(771)	(375)
Total derivative assets	1,495	1,964
Derivative assets, securities not netted	(71)	(96)
Net Exposure	1,424	1,868
Derivative, collateral, obligation to return cash	1,200	608
Derivative, collateral, obligation to return securities	66	82
Derivative, collateral, right to reclaim cash	$ 1,900	$ 2,300