Loans and Accounts Receivable (Details 6) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
|
Jun. 30, 2016
USD ($)
M
|
Jun. 30, 2015
USD ($)
M
|
Jun. 30, 2016
USD ($)
M
|
Jun. 30, 2015
USD ($)
M
|
|
| Troubled Debt Restructurings | ||||
| Financing Receivable, Modifications [Line Items] | ||||
| Number of Accounts | 9,000 | 13,000 | 20,000 | 27,000 |
| Aggregated Outstanding Balance | $ 77 | $ 104 | $ 172 | $ 224 |
| Card Member Loans [Member] | ||||
| Financing Receivable, Modifications [Line Items] | ||||
| Number of Accounts | 7,000 | 10,000 | 15,000 | 21,000 |
| Aggregated Outstanding Balance | $ 50 | $ 70 | $ 107 | $ 150 |
| Average basis point reduction in interest rate by class of Card Member loans | 10.00% | 10.00% | 11.00% | 11.00% |
| Card Member Receivables [Member] | ||||
| Financing Receivable, Modifications [Line Items] | ||||
| Number of Accounts | 2,000 | 3,000 | 5,000 | 6,000 |
| Aggregated Outstanding Balance | $ 27 | $ 34 | $ 65 | $ 74 |
| Average payment term extension | M | 17 | 12 | 17 | 12 |