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Details of Certain Consolidated Statements of Income Lines (Details 2) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2012 | Jun. 30, 2011 | Jun. 30, 2012 | Jun. 30, 2011
Component of Operating Other Cost and Expense [Line Items] |  |  |  |
Total marketing, promotion, rewards and cardmember services | $ 2,415 | $ 2,581 | $ 4,734 | $ 5,031
Marketing and promotion [Member] |  |  |  |
Component of Operating Other Cost and Expense [Line Items] |  |  |  |
Total marketing, promotion, rewards and cardmember services | 773 | 795 | 1,404 | 1,504
Cardmember rewards [Member] |  |  |  |
Component of Operating Other Cost and Expense [Line Items] |  |  |  |
Total marketing, promotion, rewards and cardmember services | 1,462 | 1,613 | 2,929 | 3,190
Cardmember services [Member] |  |  |  |
Component of Operating Other Cost and Expense [Line Items] |  |  |  |
Total marketing, promotion, rewards and cardmember services | $ 180 | $ 173 | $ 401 | $ 337

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- Definition Marketing and promotion expense includes advertising costs. Cardmember rewards expense includes the costs of rewards programs (including Membership Rewards). Cardmember services expense includes protection plans and complimentary services provided to cardmembers. + References No definition available. + Details
Name: | axp_MarketingPromotionRewardsAndCardmemberServices
Namespace Prefix: | axp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
Name: | us-gaap_ComponentOfOperatingOtherCostAndExpenseLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration