Segment Financial Data (Table) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Segment Reporting Information [Line Items]
Total net sales	$ 17,191	$ 16,006	$ 31,936	$ 30,405
Operating profit	2,355	2,507	4,453	4,513
Operating profit margin	13.70%	15.70%	13.90%	14.80%
Otis [Member]
Segment Reporting Information [Line Items]
Total net sales	3,365	3,138	6,320	5,952
Operating profit	693	650	1,263	1,225
Operating profit margin	20.60%	20.70%	20.00%	20.60%
UTC Climate Controls and Security [Member]
Segment Reporting Information [Line Items]
Total net sales	4,429	4,543	8,280	8,380
Operating profit	815	752	1,352	1,272
Operating profit margin	18.40%	16.60%	16.30%	15.20%
Pratt and Whitney [Member]
Segment Reporting Information [Line Items]
Total net sales	3,592	3,624	6,921	7,026
Operating profit	432	567	820	973
Operating profit margin	12.00%	15.60%	11.80%	13.80%
UTC Aerospace Systems [Member]
Segment Reporting Information [Line Items]
Total net sales	3,636	3,321	7,086	6,584
Operating profit	602	499	1,192	1,000
Operating profit margin	16.60%	15.00%	16.80%	15.20%
Sikorsky [Member]
Segment Reporting Information [Line Items]
Total net sales	2,384	1,566	3,745	2,815
Operating profit	(317)	156	(231)	246
Operating profit margin	(13.30%)	10.00%	(6.20%)	8.70%
Other Nonrecurring Income	830
Other Nonrecurring Expense	1,268
Total Segments [Member]
Segment Reporting Information [Line Items]
Total net sales	17,406	16,192	32,352	30,757
Operating profit	2,225	2,624	4,396	4,716
Operating profit margin	12.80%	16.20%	13.60%	15.30%
Eliminations and other [Member]
Segment Reporting Information [Line Items]
Total net sales	(215)	(186)	(416)	(352)
Operating profit	249	4	288	25
General corporate expenses [Member]
Segment Reporting Information [Line Items]
Total net sales	0	0	0	0
Operating profit	$ (119)	$ (121)	$ (231)	$ (228)