Discontinued Operations (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Discontinued Operation Income Loss From Discontinued OperationImpairment Charge During Phase Out Period Before Income Tax				$ 1,135
(Gain) loss on disposal	10	(26)	(30)	(62)
Pratt and Whitney Rocketdyne [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Disposal Date			Jun. 14, 2013
(Gain) loss on disposal			(7)
Disposal Group Including Discontinued Operation Pre tax Goodwill Impairment			360
Disposal Group Including Discontinued Operation After tax Goodwill Impairment			220
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax			(3)
UTC Power [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Disposal Date			Feb. 12, 2013
Discontinued Operation Cash Payment			$ 48