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Reserves For Losses (Details 3) (USD $) In Millions, unless otherwise specified | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
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Cardmember Loans And Related Reserves Evaluated Separately And Collectively For Impairment [Abstract] |  |  |
Cardmember loans evaluated separately for impairment | $ 633 | $ 744 | $ 1,087
Reserves on cardmember loans evaluated separately for impairment | 153 | 176 | 279
Cardmember loans evaluated collectively for impairment | 64,596 | 61,877 | 59,763
Reserves on cardmember loans evaluated collectively for impairment | $ 1,318 | $ 1,698 | $ 3,367

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- Definition Represents cardmember loans evaluated collectively for impairment. + References No definition available. + Details
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- Definition Represents cardmember loans that are evaluated separately for impairment. + References No definition available. + Details
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- Definition Represents reserves on cardmember loans evaluated collectively for impairment. + References No definition available. + Details
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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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