Restructuring Restructuring Liability (Details) - USD ($) $ in Millions |
3 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
Dec. 31, 2015 |
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
|
| Restructuring Reserve [Roll Forward] | ||||
| Beginning Balance | $ 97 | $ 134 | ||
| Restructuring | $ 108 | 177 | 140 | $ 137 |
| Payments made during the period | (133) | (162) | ||
| Foreign currency and other | (10) | (15) | ||
| Ending Balance | 131 | 131 | 97 | 134 |
| Employee Termination Benefits Liability | ||||
| Restructuring Reserve [Roll Forward] | ||||
| Beginning Balance | 95 | 130 | ||
| Restructuring | 175 | 139 | ||
| Payments made during the period | (131) | (159) | ||
| Foreign currency and other | (10) | (15) | ||
| Ending Balance | 129 | 129 | 95 | 130 |
| Other Exit Costs Liability | ||||
| Restructuring Reserve [Roll Forward] | ||||
| Beginning Balance | 2 | 4 | ||
| Restructuring | 2 | 1 | ||
| Payments made during the period | (2) | (3) | ||
| Foreign currency and other | 0 | 0 | ||
| Ending Balance | $ 2 | $ 2 | $ 2 | $ 4 |