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Reserves for Losses (Details 1) (USD $) In Millions, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
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Card Member Receivables And Related Reserves Evaluated Separately and Collectively For Impairment [Abstract] |  |  |
Card Member receivables evaluated separately for impairment | $ 48 us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment | $ 50 us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment | $ 117 us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
Reserves on Card Member receivables evaluated separately for impairment | 35 us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1 | 38 us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1 | 91 us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
Card Member receivables evaluated collectively for impairment | 44,803 us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment | 44,113 us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment | 42,649 us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
Reserves on Card Member receivables evaluated collectively for impairment | $ 430 us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment | $ 348 us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment | $ 337 us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment

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- Details
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- Definition The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953423-111524 + Details
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- Definition Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953423-111524 + Details
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- Definition The balance of financing receivables that were collectively evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953423-111524 + Details
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- Definition The balance of financing receivables that were individually evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953423-111524 + Details
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