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

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- References

No definition available.

+ Details

Name:	axp_PriorPeriodReclassificationAdjustmentAbstract
Namespace Prefix:	axp_
Data Type:	xbrli:stringItemType
Balance Type:	na
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- 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