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Basis of Presentation (Details Textuals) $ in Millions | 9 Months Ended
--- | ---
Sep. 30, 2015 USD ($)
PriorPeriodReclassificationAdjustment[Abstract] |
PriorPeriodReclassification | $ 250

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

X
- Definition The amount of a reclassification adjustment made to prior period financial statement amounts. + References No definition available. + Details
Name: | us-gaap_PriorPeriodReclassificationAdjustment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration