|
Reserves For Losses (Details 3) (USD $)
In Millions, unless otherwise specified |
Dec. 31, 2014
|
Dec. 31, 2013
|
Dec. 31, 2012
|
|---|---|---|---|
| Card Member Loans And Related Reserves Evaluated Separately And Collectively For Impairment [Abstract] | |||
| Card Member loans evaluated separately for impairment | $ 286 | $ 356 | $ 633 |
| Reserves on Card Member loans evaluated separately for impairment | 67 | 78 | 153 |
| Card Member loans evaluated collectively for impairment | 70,100 | 66,882 | 64,596 |
| Reserves on Card Member loans evaluated collectively for impairment | $ 1,134 | $ 1,183 | $ 1,318 |