Regulatory Matters and Capital Adequacy (Details Textuals) $ in Billions |
12 Months Ended |
|---|---|
|
Dec. 31, 2016
USD ($)
| |
| Regulatory Matters And Capital Adequacy [Abstract] | |
| Restricted net assets of subsidiaries | $ 7.8 |
| Retained Earnings Available For Payment Of Dividends | 6.0 |
| American Express Centurion Bank [Member] | |
| Regulatory Matters And Capital Adequacy [Abstract] | |
| Dividends paid from retained earnings to its parent company | 1.6 |
| American Express Bank, FSB [Member] | |
| Regulatory Matters And Capital Adequacy [Abstract] | |
| Dividends paid from retained earnings to its parent company | $ 3.2 |