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v2.4.1.9

Non-Interest Revenue and Expense Detail (Details 2) (USD $) In Millions, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2015 | Mar. 31, 2014
Details Of Certain Statements Of Income Lines Details [Abstract] |  |
Professional services | $ 624 axp_ProfessionalServices | $ 692 axp_ProfessionalServices
Occupancy and equipment | 434 us-gaap_OccupancyNet | 462 us-gaap_OccupancyNet
Card and merchant-related fraud losses | 100 axp_CardRelatedFraudLosses | 84 axp_CardRelatedFraudLosses
Communications | 88 us-gaap_CommunicationsAndInformationTechnology | 93 us-gaap_CommunicationsAndInformationTechnology
Other | 153 axp_OtherNetExpenses | 218 axp_OtherNetExpenses
Total other, net | $ 1,399 us-gaap_OtherNoninterestExpense | $ 1,549 us-gaap_OtherNoninterestExpense

X
- Definition This represents expenses incurred with respect to card-related fraud losses + References No definition available. + Details
Name: | axp_CardRelatedFraudLosses
Namespace Prefix: | axp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

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- Definition Represents other, net expenses from miscellaneous items within other revenues not previously classified. + References No definition available. + Details
Name: | axp_OtherNetExpenses
Namespace Prefix: | axp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition The aggregate amount of professional services fees and other processing expenses. + References No definition available. + Details
Name: | axp_ProfessionalServices
Namespace Prefix: | axp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition The amount of expense in the period for communications and data processing expense. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.4) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
Name: | us-gaap_CommunicationsAndInformationTechnology
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of net occupancy expense that may include items, such as depreciation of facilities and equipment, lease expenses, property taxes and property and casualty insurance expense. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.6) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6455398&loc=d3e45280-112737 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.14(b)) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
Name: | us-gaap_OccupancyNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Other noninterest expenses that are not separately presented in any other noninterest expense category. + 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 210.9-04.14) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration