Intangible Assets and Goodwill - Recent Acquisitions (Details) shares in Millions, $ in Billions										12 Months Ended
	Oct. 16, 2019 USD ($)	Jul. 11, 2019 USD ($)	Mar. 11, 2019 USD ($)	Jan. 07, 2019 USD ($) shares	Mar. 28, 2018 USD ($)	Mar. 07, 2018 USD ($)	Aug. 28, 2017 USD ($)	Mar. 13, 2017 CLP ($)	Mar. 13, 2017 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Business Acquisition [Line Items]
Goodwill										$ 2,067,000,000	$ 1,514,000,000	$ 938,000,000
Purchase accounting adjustments										9,000,000	1,000,000
Data Solutions Business
Business Acquisition [Line Items]
Consideration transferred	$ 85,000,000
Goodwill	54,000,000
Intangible assets	28,000,000
Net assets	3,000,000
Data Solutions Business | Customer relationships
Business Acquisition [Line Items]
Intangible assets	$ 22,000,000
Useful life of intangibles	16 years
Data Solutions Business | Completed technology
Business Acquisition [Line Items]
Intangible assets	$ 6,000,000
Useful life of intangibles	5 years
WatchGuard
Business Acquisition [Line Items]
Consideration transferred		$ 271,000,000
Goodwill		156,000,000
Intangible assets		63,000,000
Net assets		31,000,000
Acquired debt		$ 16,000,000
Average service period		2 years
Cash paid for acquisition		$ 250,000,000
WatchGuard | Customer relationships
Business Acquisition [Line Items]
Intangible assets		$ 33,000,000
Useful life of intangibles		13 years
WatchGuard | Completed technology
Business Acquisition [Line Items]
Intangible assets		$ 30,000,000
Useful life of intangibles		7 years
Avtec
Business Acquisition [Line Items]
Consideration transferred			$ 136,000,000
Goodwill			68,000,000
Intangible assets			64,000,000
Assets acquired			$ 4,000,000
Useful life of intangibles			15 years
Cash paid for acquisition			$ 136,000,000
Avtec | Customer relationships
Business Acquisition [Line Items]
Intangible assets			21,000,000
Avtec | Completed technology
Business Acquisition [Line Items]
Intangible assets			$ 43,000,000
Vaas
Business Acquisition [Line Items]
Consideration transferred				$ 445,000,000
Goodwill				261,000,000
Intangible assets				141,000,000
Acquired debt				$ 38,000,000
Average service period				1 year
Cash paid for acquisition				$ 231,000,000
Acquisition shares (in shares) | shares				1.4
Acquisition shares				$ 160,000,000
Total consideration				391,000,000
Acquired liabilities				11,000,000
Vaas | Customer relationships
Business Acquisition [Line Items]
Intangible assets				$ 42,000,000
Useful life of intangibles				15 years
Vaas | Completed technology
Business Acquisition [Line Items]
Intangible assets				$ 99,000,000
Useful life of intangibles				10 years
Avigilon
Business Acquisition [Line Items]
Consideration transferred					$ 974,000,000
Goodwill					434,000,000
Intangible assets					498,000,000
Assets acquired					42,000,000
Acquired debt					75,000,000
Cash payments					980,000,000
Cash acquired from acquisition					107,000,000
Transaction costs					26,000,000
Goodwill expected to be tax deductible					$ 0
Avigilon | Minimum
Business Acquisition [Line Items]
Useful life of intangibles					2 years
Avigilon | Maximum
Business Acquisition [Line Items]
Useful life of intangibles					20 years
Avigilon | Customer relationships
Business Acquisition [Line Items]
Intangible assets					$ 110,000,000
Avigilon | Completed technology
Business Acquisition [Line Items]
Intangible assets					380,000,000
Avigilon | Trade names
Business Acquisition [Line Items]
Intangible assets					$ 8,000,000
Plant Holdings, Inc.
Business Acquisition [Line Items]
Goodwill										160,000,000	151,000,000
Intangible assets											80,000,000
Cash paid for acquisition						$ 237,000,000
Acquired liabilities											$ 6,000,000
Purchase accounting adjustments										$ 9,000,000
Goodwill expected to be tax deductible						$ 0
Plant Holdings, Inc. | Minimum
Business Acquisition [Line Items]
Useful life of intangibles						10 years
Plant Holdings, Inc. | Maximum
Business Acquisition [Line Items]
Useful life of intangibles						20 years
Plant Holdings, Inc. | Customer relationships
Business Acquisition [Line Items]
Intangible assets						$ 41,000,000
Plant Holdings, Inc. | Completed technology
Business Acquisition [Line Items]
Intangible assets						27,000,000
Plant Holdings, Inc. | Trade names
Business Acquisition [Line Items]
Intangible assets						$ 12,000,000
Kodiak Networks
Business Acquisition [Line Items]
Consideration transferred							$ 225,000,000
Goodwill							191,000,000
Intangible assets							44,000,000
Acquired liabilities							$ 10,000,000
Kodiak Networks | Minimum
Business Acquisition [Line Items]
Useful life of intangibles							13 years
Kodiak Networks | Maximum
Business Acquisition [Line Items]
Useful life of intangibles							16 years
Kodiak Networks | Customer relationships
Business Acquisition [Line Items]
Intangible assets							$ 25,000,000
Kodiak Networks | Completed technology
Business Acquisition [Line Items]
Intangible assets							$ 19,000,000
Interexport
Business Acquisition [Line Items]
Consideration transferred								$ 98	$ 147,000,000
Intangible assets									$ 61,000,000
Useful life of intangibles								7 years	7 years
Acquired debt									$ 92,000,000
Cash paid for acquisition									55,000,000
Property, plant and equipment, net									70,000,000
Other tangible assets									16,000,000
Interexport | Customer relationships
Business Acquisition [Line Items]
Intangible assets									56,000,000
Interexport | Other intangibles
Business Acquisition [Line Items]
Intangible assets									$ 5,000,000