Reserves for Losses (Details 2) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2016 |
Jun. 30, 2015 |
Jun. 30, 2016 |
Jun. 30, 2015 |
|
| Changes in the Card Member receivables reserve for losses | ||||
| Balance, January 1 | $ 462 | $ 465 | ||
| Card Member receivables - provisions | $ 153 | $ 165 | 322 | 339 |
| Card Member receivables - net write-offs | (359) | (370) | ||
| Card Member receivables - other | (2) | (14) | ||
| Balance, March 31 | $ 423 | $ 420 | $ 423 | $ 420 |