Quarterly Financial Data (Details Textuals) - USD ($) |
3 Months Ended | 12 Months Ended | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2015 |
Sep. 30, 2015 |
Jun. 30, 2015 |
Mar. 31, 2015 |
Dec. 31, 2014 |
Sep. 30, 2014 |
Jun. 30, 2014 |
Mar. 31, 2014 |
Dec. 31, 2012 |
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
|
| Quarterly Financial Data (Textuals) [Abstract] | ||||||||||||
| Earnings allocated to participating share awards | $ 6,000,000 | $ 10,000,000 | $ 11,000,000 | $ 11,000,000 | $ 11,000,000 | $ 11,000,000 | $ 12,000,000 | $ 12,000,000 | $ 38,000,000 | $ 46,000,000 | $ 47,000,000 | |
| Dividends Preferred Stock | $ 20,000,000 | $ 22,000,000 | $ 20,000,000 | $ 0 | $ 62,000,000 | $ 0 | $ 0 | |||||
| Periods in the prior year [Member] | ||||||||||||
| Card Member reimbursements | $ 0 | |||||||||||
| Periods prior to the prior year [Member] | ||||||||||||
| Card Member reimbursements | $ 0 | |||||||||||