Goodwill and Other Intangible Assets, net (Goodwill and Other Intangible Assets, net, by Segment) (Details) - USD ($) $ in Millions |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|---|---|---|---|
| Goodwill And Other Intangible Assets [Line Items] | |||
| Goodwill | $ 7,324 | $ 7,415 | $ 8,388 |
| Other Intangible Assets, net | 2,470 | 2,623 | |
| European Union [Member] | |||
| Goodwill And Other Intangible Assets [Line Items] | |||
| Goodwill | 1,238 | 1,310 | 1,439 |
| Other Intangible Assets, net | 479 | 516 | |
| Eastern Europe, Middle East & Africa [Member] | |||
| Goodwill And Other Intangible Assets [Line Items] | |||
| Goodwill | 372 | 374 | 476 |
| Other Intangible Assets, net | 200 | 201 | |
| Asia [Member] | |||
| Goodwill And Other Intangible Assets [Line Items] | |||
| Goodwill | 3,596 | 3,581 | 3,904 |
| Other Intangible Assets, net | 1,074 | 1,087 | |
| Latin America & Canada [Member] | |||
| Goodwill And Other Intangible Assets [Line Items] | |||
| Goodwill | 2,118 | 2,150 | $ 2,569 |
| Other Intangible Assets, net | $ 717 | $ 819 |