Goodwill and Other Intangible Assets - Schedule of Other Intangible Assets (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Line Items]
Accumulated amortization	$ (1,160)	$ (1,094)
Intangible assets, gross, Total	2,221	2,160
Intangible assets, net, Total	1,061	1,066
Customer relationships — commercial
Goodwill and Intangible Assets Disclosure [Line Items]
Intangible assets, gross	839	832
Accumulated amortization	(653)	(619)
Intangible assets, net	186	213
Proprietary technology
Goodwill and Intangible Assets Disclosure [Line Items]
Intangible assets, gross	479	476
Accumulated amortization	(463)	(434)
Intangible assets, net	16	42
Customer relationships — defense
Goodwill and Intangible Assets Disclosure [Line Items]
Intangible assets, gross	62	62
Accumulated amortization	(44)	(41)
Intangible assets, net	18	21
Trade name
Goodwill and Intangible Assets Disclosure [Line Items]
Intangible assets	791	790
In process research and development
Goodwill and Intangible Assets Disclosure [Line Items]
Intangible assets	$ 50	$ 0