Significant Credit Concentrations (Details 1) - USD ($) $ in Billions |
Dec. 31, 2015 |
Dec. 31, 2014 |
|---|---|---|
| Card Member loans and receivables exposure | ||
| On-balance sheet | $ 118 | $ 115 |
| Individuals [Member] | ||
| Card Member loans and receivables exposure | ||
| Unused lines-of-credit | 297 | 278 |
| U.S. [Member] | ||
| Card Member loans and receivables exposure | ||
| On-balance sheet | 99 | 94 |
| U.S. [Member] | Individuals [Member] | ||
| Card Member loans and receivables exposure | ||
| Unused lines-of-credit | 259 | 234 |
| Non-U.S. [Member] | ||
| Card Member loans and receivables exposure | ||
| On-balance sheet | 19 | 21 |
| Non-U.S. [Member] | Individuals [Member] | ||
| Card Member loans and receivables exposure | ||
| Unused lines-of-credit | $ 38 | $ 44 |