Non-Interest Revenue and Expense Detail (Details 1) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2016 |
Jun. 30, 2015 |
Jun. 30, 2016 |
Jun. 30, 2015 |
|
| Details Of Certain Statements Of Income Lines Details [Abstract] | ||||
| Global Network Services partner revenues | $ 197 | $ 155 | $ 342 | $ 318 |
| Gross realized gains on investment securities | 0 | 0 | 4 | 0 |
| Other | 348 | 366 | 685 | 671 |
| Total other revenues | $ 545 | $ 521 | $ 1,031 | $ 989 |