Acquisitions, Divestitures and Discontinued Operations, Assets Held for Sale (Details) - USD ($) $ in Millions		3 Months Ended								12 Months Ended
	Jun. 29, 2018	Dec. 31, 2018	Sep. 28, 2018	Jun. 29, 2018	Mar. 30, 2018	Dec. 31, 2017	Sep. 29, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales		$ 2,771	$ 2,519	$ 2,583	$ 2,371	$ 2,574	$ 2,293	$ 2,385	$ 2,321	$ 10,244	$ 9,573	$ 9,210
Assets [Abstract]
Total assets classified as held for sale						135					135
Liabilities [Abstract]
Gain on sale of the Crestview Aerospace and TCS businesses										42	0	0
Income from continuing operations before income taxes										924	871	804
Crestview Aerospace and TCS [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales										64	119	166
Liabilities [Abstract]
Gain on sale of the Crestview Aerospace and TCS businesses	$ 42	$ 2	$ 4	$ 48						42	0	0
Income from continuing operations before income taxes										$ 45	(2)	$ 12
Crestview Aerospace and TCS [Member] | Discontinued Operations, Held-for-sale [Member]
Assets [Abstract]
Billed receivables						14					14
Contracts in process						33					33
Total current assets						47					47
Property, plant and equipment, net						34					34
Goodwill						52					52
Identifiable intangible assets						2					2
Total assets classified as held for sale						135					135
Liabilities [Abstract]
Accounts payable, trade						3					3
Accrued employment costs						2					2
Accrued expenses						3					3
Other current liabilities						5					5
Total current liabilities						13					13
Deferred income taxes						4					4
Liabilities held for sale						$ 17					$ 17