Acquisition, Dispositions, Goodwill and Other Intangible Assets (Goodwill) (Details)
$ in Millions |
9 Months Ended |
|
Sep. 30, 2016
USD ($)
|
|---|
| Goodwill [Line Items] |
|
| Goodwill - Beginning Balance |
$ 27,301
|
| Goodwill Resulting from Business Combinations |
494
|
| Goodwill - Foreign Currency Translation and Other |
(373)
|
| Goodwill - Ending Balance |
27,422
|
| Otis [Member] |
|
| Goodwill [Line Items] |
|
| Goodwill - Beginning Balance |
1,566
|
| Goodwill Resulting from Business Combinations |
19
|
| Goodwill - Foreign Currency Translation and Other |
49
|
| Goodwill - Ending Balance |
1,634
|
| UTC Climate, Controls & Security [Member] |
|
| Goodwill [Line Items] |
|
| Goodwill - Beginning Balance |
9,458
|
| Goodwill Resulting from Business Combinations |
450
|
| Goodwill - Foreign Currency Translation and Other |
(208)
|
| Goodwill - Ending Balance |
9,700
|
| Pratt & Whitney [Member] |
|
| Goodwill [Line Items] |
|
| Goodwill - Beginning Balance |
1,515
|
| Goodwill Resulting from Business Combinations |
0
|
| Goodwill - Foreign Currency Translation and Other |
(4)
|
| Goodwill - Ending Balance |
1,511
|
| UTC Aerospace Systems [Member] |
|
| Goodwill [Line Items] |
|
| Goodwill - Beginning Balance |
14,759
|
| Goodwill Resulting from Business Combinations |
25
|
| Goodwill - Foreign Currency Translation and Other |
(210)
|
| Goodwill - Ending Balance |
14,574
|
| Total Segments [Member] |
|
| Goodwill [Line Items] |
|
| Goodwill - Beginning Balance |
27,298
|
| Goodwill Resulting from Business Combinations |
494
|
| Goodwill - Foreign Currency Translation and Other |
(373)
|
| Goodwill - Ending Balance |
27,419
|
| Eliminations and other [Member] |
|
| Goodwill [Line Items] |
|
| Goodwill - Beginning Balance |
3
|
| Goodwill Resulting from Business Combinations |
0
|
| Goodwill - Foreign Currency Translation and Other |
0
|
| Goodwill - Ending Balance |
$ 3
|