Other Income/(Loss) (Details) - Operating Segments [Member] - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Sep. 30, 2015 |
|
| Non-Financial Services [Member] | ||||
| Investment-related interest income | $ 50 | $ 60 | $ 163 | $ 161 |
| Interest income/(expense) on income taxes | 9 | 0 | 8 | 1 |
| Realized and unrealized gains/(losses) on cash equivalents and marketable securities | (13) | 189 | 52 | 146 |
| Gains/(Losses) on changes in investments in affiliates | (1) | 0 | 180 | 18 |
| Royalty income | 174 | 149 | 494 | 448 |
| Other | 109 | 48 | 224 | 134 |
| Total | 328 | 446 | 1,121 | 908 |
| Financial Services [Member] | ||||
| Investment-related interest income | 18 | 19 | 57 | 58 |
| Interest income/(expense) on income taxes | (2) | (3) | 11 | (9) |
| Insurance premiums earned | 38 | 32 | 118 | 97 |
| Other | 78 | 49 | 119 | 95 |
| Total | $ 132 | $ 97 | $ 305 | $ 241 |