Goodwill and Mortgage Servicing Rights - Mortgage Fees and Related Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Risk management:
All other	$ 14	$ 11	$ 12
Mortgage fees and related income	1,250	2,170	3,091
Consumer & Community Banking
CCB mortgage fees and related income
Production revenue	497	2,215	2,629
Operating revenue:
Loan servicing revenue	1,582	1,257	1,367
Changes in MSR asset fair value due to collection/realization of expected cash flows	(936)	(788)	(899)
Total operating revenue	646	469	468
Risk management:
Changes in MSR asset fair value due to market interest rates and other	2,022	404	(1,568)
Other changes in MSR asset fair value due to other inputs and assumptions in model	17	(306)	28
Change in derivative fair value and other	(1,946)	(623)	1,522
Total risk management	93	(525)	(18)
Total net mortgage servicing revenue	739	(56)	450
Mortgage fees and related income	$ 1,236	$ 2,159	$ 3,079