Goodwill and Other Intangible Assets - Schedule of Goodwill by Reportable Segment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 1,510	$ 1,510	$ 1,511
Additions	0	0	0
Divestitures			(1)
Goodwill, ending balance	1,510	1,510	1,510
Commercial, Consumer & Wealth
Goodwill [Roll Forward]
Goodwill, beginning balance	1,217	1,217	1,217
Additions	0	0	0
Divestitures			0
Goodwill, ending balance	1,217	1,217	1,217
Wholesale
Goodwill [Roll Forward]
Goodwill, beginning balance	293	293	294
Additions	0	0	0
Divestitures			(1)
Goodwill, ending balance	$ 293	$ 293	$ 293