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Asset Securitizations (Details Textuals) (American Express Travel Related Services Company Inc [Member], USD $) In Billions, unless otherwise specified | Dec. 31, 2014
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American Express Travel Related Services Company Inc [Member] |
Securitized Trusts [Line Items] |
Subordinated securities owned | $ 1.2 axp_SubordinatedSecuritiesOwned / dei_LegalEntityAxis = axp_AmericanExpressTravelRelatedServicesCompanyIncMember

X
- Details
Name: | axp_SecuritizedTrustsLineItems
Namespace Prefix: | axp_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Represents subordinated interests in the securitized Card Member loans, including rated and unrated investments in tranches of the securitization (subordinated securities). + References No definition available. + Details
Name: | axp_SubordinatedSecuritiesOwned
Namespace Prefix: | axp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant