Quarterly Financial Data Asset impairment and MTM gains and losses (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Jan. 02, 2021	Sep. 26, 2020	Jun. 27, 2020	Mar. 28, 2020	Dec. 28, 2019	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
Operating profit									$ 1,761	$ 1,401	$ 1,706
Other income (expense)									121	188	$ (90)
Restructuring and cost reduction charges
Operating profit	$ (22)	$ 0	$ (14)	$ (1)	$ (27)	$ (18)	$ (65)	$ (8)	(37)	(118)
Other income (expense)	8	0	0	0	5	0	0	0	8	5
Gains (Losses) on mark-to-market adjustments
Operating profit	(1)	10	(43)	26	0	(11)	46	(42)	(8)	(7)
Other income (expense)	$ (90)	$ (7)	$ (43)	$ (14)	$ (120)	$ 32	$ (11)	$ 1	$ (154)	$ (98)