|
Commitments, Contingencies and Guarantees (Schedule of Maximum Potential Counterparty Exposures Related to Settlement Guarantees) (Details) (USD $)
In Millions, unless otherwise specified |
Mar. 31, 2015
|
|---|---|
| Merchant Guarantee [Member] | Diners Club [Member] | |
| Guarantor Obligations [Line Items] | |
| Maximum potential counterparty exposures to settlement guarantees | $ 107 |
| ATM Guarantee [Member] | PULSE [Member] | |
| Guarantor Obligations [Line Items] | |
| Maximum potential counterparty exposures to settlement guarantees | $ 1 |