Supplemental Financial Information - Depreciation, amortization and impairment (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 28, 2020	Jun. 30, 2019	Jun. 28, 2020	Jun. 30, 2019
Finite-Lived Intangible Assets [Line Items]
Depreciation of property, plant and equipment	$ 136	$ 128	$ 269	$ 252
Total - Depreciation, amortization and impairment	543	506	1,083	1,008
Internal Use Software
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	1	2	3	4
Other Intangible Assets
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 406	$ 376	$ 811	$ 752