|
Reserves For Losses (Details 3) (USD $)
In Millions, unless otherwise specified |
Sep. 30, 2013
|
Dec. 31, 2012
|
|---|---|---|
| Card Member Loans And Related Reserves Evaluated Separately And Collectively For Impairment [Abstract] | ||
| Card Member loans evaluated individually for impairment | $ 401 | $ 633 |
| Reserves on Card Member loans evaluated individually for impairment | 86 | 153 |
| Card Member loans evaluated collectively for impairment | 62,569 | 64,596 |
| Reserves on Card Member loans evaluated collectively for impairment | $ 1,195 | $ 1,318 |