Goodwill, Mortgage Servicing Rights, and Other Intangible Assets - Mortgage Fees and Related Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Risk management:
Mortgage fees and related income	$ 1,381	$ 1,401	$ 1,176
All other	55	23	1
CCB
CCB mortgage fees and related income
Production revenue	622	627	421
Operating revenue:
Loan servicing revenue	1,651	1,659	1,634
Changes in MSR asset fair value due to collection/realization of expected cash flows	(1,065)	(1,067)	(1,011)
Total operating revenue	586	592	623
Risk management:
Changes in MSR asset fair value due to market interest rates and other	48	670	424
Other changes in MSR asset fair value due to other inputs and assumptions in model	0	92	43
Change in derivative fair value and other	70	(603)	(336)
Total risk management	118	159	131
Total net mortgage servicing revenue	704	751	754
Mortgage fees and related income	$ 1,326	$ 1,378	$ 1,175