Acquisitions and Divestitures Assets and Liabilities Held for Sale by Major Class (Details) - USD ($) $ in Millions	Sep. 26, 2020	Dec. 28, 2019
Business Combinations [Abstract]
Cash and cash equivalents	$ 33	$ 27
Inventories	425	21
Property, plant and equipment, net	277	25
Goodwill (net of impairment of $300 at September 26, 2020 and $0 at December 28, 2019)	280	0
Intangible assets, net	874	23
Other	(33)	(26)
Total assets held for sale	1,922	122
Trade payables	2	3
Other	16	6
Total liabilities held for sale	18	9
Disposal Group, impairment of goodwill in Disposal Group	$ (300)	$ 0

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