Service Fees and Other Revenue and Other Expenses - Service Fees and Other Revenue (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Non Interest Revenues [Line Items]
Total non-interest revenues	$ 50,406	$ 47,381	$ 42,967
Service fees and other revenue
Non Interest Revenues [Line Items]
Service fees	1,609	1,518	1,444
Foreign currency-related revenue	1,527	1,428	1,202
Delinquency fees	941	963	809
Travel commissions and fees	596	637	507
Other fees and revenues	456	459	559
Total non-interest revenues	$ 5,129	$ 5,005	$ 4,521

Commissions and fees earned by charging clients transaction or management fees for selling and arranging travel and travel management services. Client transaction fee revenue is recognized at the time the client books the travel arrangements. Travel management services revenue is recognized over the contractual term of the agreement. The Company's travel suppliers (for example, airlines, hotels, car rental companies) pay commissions and fees on tickets issued, sales and other services based on contractual agreements. Commissions and fees from travel suppliers are generally recognized at the time a ticket is purchased or over the term of the contract. Commissions and fees that are based on actual usage that is unknown at time of purchase (for example, hotel and car rentals), are recognized when cash is received.

No definition available.

Name:	axp_TravelCommissionsAndFees
Namespace Prefix:	axp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration