Derivative Instruments and Hedging Activities - Offsetting Liabilities (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Derivative liabilities
Derivative liabilities, gross amount	$ 3,699	$ 4,550
Derivative liabilities, offsetting financial instruments	(388)	(759)
Derivative liabilities, offsetting cash collateral	(244)	(476)
Total derivative liabilities	3,067	3,315
Derivative liabilities, securities collateral not netted	(79)	(85)
Net exposure	2,988	3,230
Repurchase agreements
Gross amounts	522	883
Repurchase agreements, securities sold, offset	0	0
Repurchase agreements, cash collateral pledged, offset	0	0
Net amounts as recognized	522	883
Repurchase agreements, securities collateral not netted	(522)	(883)
Net exposure	0	0
Derivative, collateral, obligation to return cash	1,600	608
Derivative, collateral, obligation to return securities	72	82
Derivative, collateral, right to reclaim cash	2,000	2,300
Securities sold under repurchase agreements, fair value of collateral	$ 528	$ 900