Goodwill and Mortgage Servicing Rights - Mortgage Fees and Related Income (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Risk management:
Mortgage fees and related income	$ 221	$ 460
All other	(2)	4
Consumer & Community Banking
CCB mortgage fees and related income
Production revenue	75	211
Operating revenue:
Loan servicing revenue	400	368
Changes in MSR asset fair value due to collection/realization of expected cash flows	(240)	(232)
Total operating revenue	160	136
Risk management:
Changes in MSR asset fair value due to market interest rates and other	(22)	894
Other changes in MSR asset fair value due to other inputs and assumptions in model	11	65
Changes in derivative fair value and other	(1)	(850)
Total risk management	(12)	109
Total net mortgage servicing revenue	148	245
Mortgage fees and related income	$ 223	$ 456