Asset Quality - Schedule of Changes in Liability for Credit Losses on Lending Related Commitments (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Balance at beginning of period	$ 291	$ 173	$ 225	$ 160
Provision (credit) for losses on off balance sheet exposures	2	21	68	34
Other	(3)	0	(3)	0
Balance at end of period	$ 290	$ 194	$ 290	$ 194