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Reserves For Losses (Details 3) (USD $) In Millions, unless otherwise specified | Sep. 30, 2014 | Dec. 31, 2013
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Card Member Loans And Related Reserves Evaluated Separately And Collectively For Impairment [Abstract] |  |
Card Member loans evaluated individually for impairment | $ 309 | $ 378
Reserves on Card Member loans evaluated individually for impairment | 70 | 84
Card Member loans evaluated collectively for impairment | 65,748 | 66,860
Reserves on Card Member loans evaluated collectively for impairment | $ 1,076 | $ 1,177

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- Details
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Namespace Prefix: | axp_
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Balance Type: | na
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- Definition Represents cardmember loans evaluated collectively for impairment. + References No definition available. + Details
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Namespace Prefix: | axp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Represents cardmember loans that are evaluated separately for impairment. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Represents reserves on cardmember loans evaluated collectively for impairment. + References No definition available. + Details
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Namespace Prefix: | axp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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- Definition Represents reserves on cardmember loans that are evaluated separately for impairment. + References No definition available. + Details
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Namespace Prefix: | axp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant