Guarantees (Details) - USD ($) $ in Millions |
9 Months Ended | |
|---|---|---|
Sep. 30, 2016 |
Sep. 30, 2015 |
|
| Product Warranty Liability [Line Items] | ||
| Balance as of January 1 | $ 1,212 | $ 1,264 |
| Warranties and performance guarantees issued | 218 | 208 |
| Settlements made | 192 | 217 |
| Other | 0 | (56) |
| Balance as of September 30 | $ 1,238 | 1,199 |
| Discontinued Operations, Disposed of by Sale [Member] | ||
| Product Warranty Liability [Line Items] | ||
| Balance as of September 30 | $ 42 | |