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Goodwill and Other Intangible Assets - Goodwill Business Segments (Details) $ in Millions	9 Months Ended
	Sep. 30, 2024 USD ($)
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 15,065
Other adjustments	18
Goodwill, ending balance	15,083
Credit Card
Goodwill [Roll Forward]
Goodwill, beginning balance	5,366
Other adjustments	18
Goodwill, ending balance	5,384
Consumer Banking
Goodwill [Roll Forward]
Goodwill, beginning balance	4,645
Other adjustments	0
Goodwill, ending balance	4,645
Commercial Banking
Goodwill [Roll Forward]
Goodwill, beginning balance	5,054
Other adjustments	0
Goodwill, ending balance	$ 5,054

X

- Definition

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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X

- Definition

Amount of increase (decrease) of asset representing future economic benefit from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized, classified as other.

+ References

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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