Intangible Assets and Goodwill - Carrying Amount of Goodwill (Details) $ in Millions	9 Months Ended
Sep. 28, 2019 USD ($)
Goodwill Activity
Balance as of January 1, 2019	$ 1,514
Goodwill acquired	487
Purchase accounting adjustments	9
Foreign currency	(4)
Balance as of September 28, 2019	2,006
Products and Systems Integration
Goodwill Activity
Balance as of January 1, 2019	722
Goodwill acquired	251
Purchase accounting adjustments	0
Foreign currency	0
Balance as of September 28, 2019	973
Services and Software
Goodwill Activity
Balance as of January 1, 2019	792
Goodwill acquired	236
Purchase accounting adjustments	9
Foreign currency	(4)
Balance as of September 28, 2019	$ 1,033

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of increase (decrease) from adjustments after acquisition date under purchase accounting of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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