Discontinued Operations (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Discontinued Operations and Disposal Groups [Abstract]
Disposal Group, Including Discontinued Operation, Description and Timing of Disposal	On November 6, 2015, we completed the sale of Sikorsky to Lockheed Martin Corp.
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Disposal Group, Including Discontinued Operation, Revenue	$ 0	$ 1,266
Disposal Group, Including Discontinued Operation, Costs of Goods Sold	0	1,062
Disposal Group, Including Discontinued Operation, Research and Development Expense	0	38
Disposal Group, Including Discontinued Operation, General and Administrative Expense	0	87
Disposal Group, Including Discontinued Operation, Other Income	0	12
Disposal Group, Including Discontinued Operation, Operating Income	0	91
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax [Abstract]
Discontinued Operation, Gain from Disposal of Discontinued Operation, before Income Tax	18	0
Discontinued Operation, Tax Effect of Discontinued Operation	7	28
Net Cash Provided by (Used in) Discontinued Operations [Abstract]
Net cash outflows from discontinued operations	(2,227)	(336)
Income from discontinued operations	$ 11	$ 63