Note 14: Segment Financial Data (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Segment Reporting Information [Line Items]
Total net sales	$ 14,399	$ 12,416
Operating profit	2,006	1,713
Operating Profit Margin	13.90%	13.80%
Business Acquisition Effective Date Of Acquisition	Jul. 01, 2012
Business Acquisition Revenue Reported By Acquired Entity For Current Year	600
Otis [Member]
Segment Reporting Information [Line Items]
Total net sales	2,814	2,770
Operating profit	575	566
Operating Profit Margin	20.40%	20.40%
UTC Climate Controls and Security [Member]
Segment Reporting Information [Line Items]
Total net sales	3,837	4,112
Operating profit	520	544
Operating Profit Margin	13.60%	13.20%
Pratt and Whitney [Member]
Segment Reporting Information [Line Items]
Total net sales	3,402	3,052
Operating profit	406	389
Operating Profit Margin	11.90%	12.70%
UTC Aerospace Systems [Member]
Segment Reporting Information [Line Items]
Total net sales	3,263	1,236
Operating profit	501	198
Operating Profit Margin	15.40%	16.00%
Sikorsky [Member]
Segment Reporting Information [Line Items]
Total net sales	1,249	1,346
Operating profit	90	136
Operating Profit Margin	7.20%	10.10%
Total Segments [Member]
Segment Reporting Information [Line Items]
Total net sales	14,565	12,516
Operating profit	2,092	1,833
Operating Profit Margin	14.40%	14.60%
Eliminations and other [Member]
Segment Reporting Information [Line Items]
Total net sales	(166)	(100)
Operating profit	21	(24)
General corporate expenses [Member]
Segment Reporting Information [Line Items]
Total net sales	0	0
Operating profit	$ (107)	$ (96)