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Non-Interest Revenue and Expense Detail (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Details Of Certain Statements Of Income Lines Details [Abstract]
Foreign currency conversion fee revenue	$ 225	$ 223	$ 665	$ 655
Delinquency fees	184	172	539	503
Loyalty Partner-related fees	100	74	286	221
Service fees	94	97	274	273
Other commissions and fees	39	44	120	136
Total other commissions and fees	$ 642	$ 610	$ 1,884	$ 1,788

X

- Definition

Represents amounts to cardmembers for failure to pay the outstanding (or minimum balance) on their cards by the due date.

+ References

No definition available.

+ Details

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- Details

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X

- Definition

Primary financial statement caption in which reported facts about foreign currency gain (loss) have been included.

+ References

No definition available.

+ Details

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Balance Type:	credit
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X

- Definition

Represents fees generated by the Loyalty Partner business.

+ References

No definition available.

+ Details

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Namespace Prefix:	axp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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X

- Definition

Represents revenues from miscellaneous items within other commissions and fees not previously classified.

+ References

No definition available.

+ Details

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- Definition

Fee for services rendered usually based on a percentage of an amount received or collected or agreed to be paid for professional services.

+ References

No definition available.

+ Details

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Namespace Prefix:	axp_
Data Type:	xbrli:monetaryItemType
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X

- Definition

Fee and commission revenue earned from sources not otherwise specified in the existing taxonomy.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 225

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-04.13)

-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph 13

-Article 9

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