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Asset Securitizations (Details Textuals) $ in Billions	Dec. 31, 2016 USD ($)
American Express Travel Related Services Company Inc [Member]
Securitized Trusts [Line Items]
Subordinated securities owned	$ 0.0
American Express Charge Trust [Member]
Securitized Trusts [Line Items]
Direct and Indirect Ownership of Variable Interests	4.5
American Express Lending Trust [Member]
Securitized Trusts [Line Items]
Direct and Indirect Ownership of Variable Interests	$ 15.1

X

- Definition

Direct and Indirect ownership of variable interests with the exception of the debt securities issued to third party investors.

+ References

No definition available.

+ Details

Name:	axp_DirectAndIndirectOwnershipOfVariableInterests
Namespace Prefix:	axp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

SecuritizedTrustsLineItems

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No definition available.

+ Details

Name:	axp_SecuritizedTrustsLineItems
Namespace Prefix:	axp_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- 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

X

- Details

Name:	dei_LegalEntityAxis=axp_AmericanExpressTravelRelatedServicesCompanyIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=axp_AmericanExpressChargeTrustMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=axp_AmericanExpressLendingTrustMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: