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Significant Credit Concentrations (Details) (USD $) In Billions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012
Maximum Credit Exposure by Category |  |
On-balance sheet | $ 141 | $ 141
Individuals [Member] |  |
Maximum Credit Exposure by Category |  |
On-balance sheet | 98 | 95
Unused lines-of-credit | 265 | 253
Financial Institutions [Member] |  |
Maximum Credit Exposure by Category |  |
On-balance sheet | 22 | 25
United States Government And Agencies [Member] |  |
Maximum Credit Exposure by Category |  |
On-balance sheet | 4 | 5
Other Concentration [Member] |  |
Maximum Credit Exposure by Category |  |
On-balance sheet | $ 17 | $ 16

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

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- Definition Represents the approximate credit line available on Card Member loans (including both for on-balance sheet loans and loans previously securitized). + References No definition available. + Details
Name: | axp_UnusedLinesOfCredit
Namespace Prefix: | axp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Maximum amount of loss due to credit risk that, based on the gross fair value of the financial instrument, the entity would incur if parties to the financial instruments that make up the concentration failed completely to perform according to the terms of the contracts and the collateral or other security, if any, for the amount due proved to be of no value to the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13537-108611 + Details
Name: | us-gaap_ConcentrationRiskCreditRiskFinancialInstrumentMaximumExposure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration