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Significant Credit Concentrations (Details Textuals) | 12 Months Ended
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Dec. 31, 2011
Significant Credit Concentrations (Textuals) [Abstract] |
Percentage of worldwide billed business | 5.00%
Percentage of worldwide cardmember lending receivables | 15.00%

X
- Definition Represents the percentage of the Company's worldwide billed business that is generated from the Company's Delta SkyMiles Credit Card co-brand portfolio accounts. + References No definition available. + Details
Name: | axp_CoBrandPortfolioAccountPercentageOfWorldwideBilledBusiness
Namespace Prefix: | axp_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the percentage of the Company's worldwide cardmember lending receivables that are attributable to the Company's Delta SkyMiles Credit Card co-brand portfolio accounts. + References No definition available. + Details
Name: | axp_CoBrandPortfolioAccountPercentageOfWorldwideCardmemberLendingReceivables
Namespace Prefix: | axp_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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