Mortgage Banking Activity - Schedule of Residential Mortgage Loans (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Loans Receivable Held-for-sale, Net, Reconciliation to Cash Flow [Roll Forward]
Balance at beginning of period	$ 551
Balance at end of period	406	$ 551
Mortgage loans
Loans Receivable Held-for-sale, Net, Reconciliation to Cash Flow [Roll Forward]
Balance at beginning of period	81	62	$ 44
Originations and purchases	1,253	951	692
Sales, net of gains	(1,187)	(932)	(674)
Balance at end of period	$ 147	$ 81	$ 62