Derivative Instruments and Hedging Activities - Offsetting Liabilities (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Derivative liabilities
Derivative liabilities, gross amount	$ 4,853	$ 1,868
Derivative liabilities, offsetting financial instruments	(425)	(252)
Derivative liabilities, offsetting cash collateral	(857)	(292)
Total derivative liabilities	3,571	1,324
Derivative liabilities, securities collateral not netted	0	0
Net exposure	3,571	1,324
Repurchase agreements
Gross amounts	594	820
Repurchase agreements, securities sold, offset	0	0
Repurchase agreements, cash collateral pledged, offset	0	0
Net amounts as recognized	594	820
Repurchase agreements, securities collateral not netted	(594)	(820)
Net exposure	0	0
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
Securities sold under repurchase agreements, fair value of collateral	$ 606	$ 836