Goodwill and Other Intangible Assets - Goodwill Business Segments (Details) $ in Millions	3 Months Ended
Mar. 31, 2026 USD ($)
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 28,509
Other adjustments	(7)
Goodwill, ending balance	28,502
Credit Card \| Operating segments
Goodwill [Roll Forward]
Goodwill, beginning balance	11,915
Other adjustments	(7)
Goodwill, ending balance	11,908
Consumer Banking \| Operating segments
Goodwill [Roll Forward]
Goodwill, beginning balance	11,540
Other adjustments	0
Goodwill, ending balance	11,540
Commercial Banking \| Operating segments
Goodwill [Roll Forward]
Goodwill, beginning balance	5,054
Other adjustments	0
Goodwill, ending balance	$ 5,054

Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

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+ Details