|
Guarantees (Details) (USD $)
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Sep. 30, 2013
|
Dec. 31, 2012
|
|---|---|---|
| Type of Guarantee | ||
| Maximum potential amount of undiscounted future payments | $ 45,000,000,000 | $ 45,000,000,000 |
| Amount of related liability | 161,000,000 | 186,000,000 |
|
Card and Travel Operations [Member]
|
||
| Type of Guarantee | ||
| Maximum potential amount of undiscounted future payments | 44,000,000,000 | 44,000,000,000 |
| Amount of related liability | 87,000,000 | 93,000,000 |
|
Other Guarantees [Member]
|
||
| Type of Guarantee | ||
| Maximum potential amount of undiscounted future payments | 1,000,000,000 | 1,000,000,000 |
| Amount of related liability | $ 74,000,000 | $ 93,000,000 |