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Reserves For Losses (Details 1) - USD ($) $ in Millions	Jun. 30, 2016	Dec. 31, 2015
Card Member Loans And Related Reserves Evaluated Separately And Collectively For Impairment [Abstract]
Card Member loans evaluated individually for impairment	$ 342	$ 279
Reserves on Card Member loans evaluated individually for impairment	62	53
Card Member loans evaluated collectively for impairment	59,545	58,294
Reserves on Card Member loans evaluated collectively for impairment	$ 1,029	$ 975

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- Definition

Represents cardmember loans evaluated collectively for impairment.

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- Definition

Represents cardmember loans that are evaluated separately for impairment.

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- Definition

Represents reserves on cardmember loans evaluated collectively for impairment.

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- Definition

Represents reserves on cardmember loans that are evaluated separately for impairment.

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