Goodwill, Mortgage Servicing Rights, and Other Intangible Assets - Goodwill Changes During Period (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Goodwill [Roll Forward]
Balance at beginning of period	$ 52,565	$ 52,634	$ 51,662
Changes during the period from:
Business combinations	0	29	917
Other	166	(98)	55
Balance at end of period	$ 52,731	$ 52,565	$ 52,634
CIFM
Business Combination [Line Items]
Percentage interest acquired			51.00%