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Reserves For Losses (Details 3) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Cardmember Loans And Related Reserves Evaluated Separately And Collectively For Impairment [Abstract]
Cardmember loans evaluated separately for impairment	$ 578	$ 633
Reserves on cardmember loans evaluated separately for impairment	144	153
Cardmember loans evaluated collectively for impairment	61,708	64,596
Reserves on cardmember loans evaluated collectively for impairment	$ 1,223	$ 1,318

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- Definition

Represents cardmember loans evaluated collectively for impairment.

+ References

No definition available.

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- Definition

Represents cardmember loans that are evaluated separately for impairment.

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No definition available.

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- Definition

Represents reserves on cardmember loans evaluated collectively for impairment.

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No definition available.

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- Definition

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

+ References

No definition available.

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