Regulatory Matters and Capital Adequacy (Details Textuals) - USD ($) $ in Billions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Regulatory Matters And Capital Adequacy [Abstract] | ||
| Restricted net assets of subsidiaries | $ 11.3 | |
| Retained Earnings Available For Payment Of Dividends | 3.2 | $ 3.6 |
| American Express Centurion Bank [Member] | ||
| Regulatory Matters And Capital Adequacy [Abstract] | ||
| Dividends paid from retained earnings to its parent company | 2.0 | 1.9 |
| American Express Bank, FSB [Member] | ||
| Regulatory Matters And Capital Adequacy [Abstract] | ||
| Dividends paid from retained earnings to its parent company | $ 2.2 | $ 2.1 |