Asset Quality - Post-Modification Outstanding Recorded Investment by Concession Type for Our Commercial Accruing and Nonaccruing TDRs (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	$ 49	$ 15	$ 68	$ 36
Total commercial loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Extension of Maturity Date	40	0	40	5
Payment or Covenant Modification/Deferment	0	0	1	7
Bankruptcy Plan Modification	0	0	0	0
Increase in new commitment or new money	0	0	0	0
Total	40	0	41	12
Total consumer loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Interest rate reduction	5	3	10	6
Other	4	12	17	18
Total	$ 9	$ 15	$ 27	$ 24