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Other Liabilities - Deferred Card and Other Fees (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
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Other Liabilities Disclosure [Abstract] |  |
Deferred card and other fees | $ 3,818 | $ 3,380
Deferred direct acquisition costs | (158) | (173)
Reserves for membership cancellations | (218) | (180)
Deferred card and other fees, net | $ 3,442 | $ 3,027

X
- Definition Represents amounts related to deferred charges and other fees including deferred fees for Membership Reward program participants + References No definition available. + Details
Name: | axp_DeferredCardAndOtherFees
Namespace Prefix: | axp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the carrying amount of deferred charge card and other fees, net of direct acquisition costs and reserves for membership cancellations. + References No definition available. + Details
Name: | axp_DeferredCardAndOtherFeesNet
Namespace Prefix: | axp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents estimated fees refundable to Card Members if they cancel their card + References No definition available. + Details
Name: | axp_ReservesForMembershipCancellations
Namespace Prefix: | axp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount, after accumulated amortization and related credit card fees, of credit card origination costs not related to private label credit cards. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 310 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481569/310-20-50-4 + Details
Name: | us-gaap_DeferredCostsCreditCardOriginationCostsAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_OtherLiabilitiesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration