Segment Financial Data (Table) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Segment Reporting Information [Line Items]
Total net sales	$ 14,745	$ 14,399
Operating profit	2,098	2,006
Operating profit margin	14.20%	13.90%
Otis [Member]
Segment Reporting Information [Line Items]
Total net sales	2,955	2,814
Operating profit	570	575
Operating profit margin	19.30%	20.40%
UTC Climate Controls and Security [Member]
Segment Reporting Information [Line Items]
Total net sales	3,851	3,837
Operating profit	537	520
Operating profit margin	13.90%	13.60%
Pratt and Whitney [Member]
Segment Reporting Information [Line Items]
Total net sales	3,329	3,402
Operating profit	388	406
Operating profit margin	11.70%	11.90%
UTC Aerospace Systems [Member]
Segment Reporting Information [Line Items]
Total net sales	3,450	3,263
Operating profit	590	501
Operating profit margin	17.10%	15.40%
Sikorsky [Member]
Segment Reporting Information [Line Items]
Total net sales	1,361	1,249
Operating profit	86	90
Operating profit margin	6.30%	7.20%
Total Segments [Member]
Segment Reporting Information [Line Items]
Total net sales	14,946	14,565
Operating profit	2,171	2,092
Operating profit margin	14.50%	14.40%
Eliminations and other [Member]
Segment Reporting Information [Line Items]
Total net sales	(201)	(166)
Operating profit	39	21
General corporate expenses [Member]
Segment Reporting Information [Line Items]
Total net sales	0	0
Operating profit	$ (112)	$ (107)