Discontinued Operations (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	$ 8	$ (136)	$ 4	$ (993)
Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, Net of Tax	19	(106)	31	(948)
Discontinued Operation Income Loss From Discontinued OperationImpairment Charge During Phase Out Period Before Income Tax		179		1,135
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax	(25)	(31)	(40)	(36)
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
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax			(17)
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			(10)
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