Accumulated Other Comprehensive Income (Loss) ("AOCI") (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 02, 2021	Jul. 03, 2020	Jul. 02, 2021	Jul. 03, 2020
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	$ 20,482	$ 22,027	$ 20,841	$ 22,744
Other comprehensive (loss) income, before income taxes			3	(140)
Income taxes			(1)	20
Other comprehensive income (loss) recognized during the period	15	21	2	(120)
Losses (gains) reclassified to earnings			2	4
Income taxes			0	0
Losses (gains) reclassified to earnings, net of income taxes	4	6	2	4
Other comprehensive income (loss), net of income taxes	19	27	4	(116)
Ending balance	19,976	22,226	19,976	22,226
Foreign currency translation
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance			(58)	(81)
Other comprehensive (loss) income, before income taxes			(3)	(60)
Income taxes			0	0
Other comprehensive income (loss) recognized during the period			(3)	(60)
Losses (gains) reclassified to earnings			2	7
Income taxes			0	0
Losses (gains) reclassified to earnings, net of income taxes			2	7
Other comprehensive income (loss), net of income taxes			(1)	(53)
Ending balance	(59)	(134)	(59)	(134)
Net unrealized losses on hedging derivatives
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance			(80)	(55)
Other comprehensive (loss) income, before income taxes			9	(80)
Income taxes			(2)	20
Other comprehensive income (loss) recognized during the period			7	(60)
Losses (gains) reclassified to earnings			(8)	7
Income taxes			2	(2)
Losses (gains) reclassified to earnings, net of income taxes			(6)	5
Other comprehensive income (loss), net of income taxes			1	(55)
Ending balance	(79)	(110)	(79)	(110)
Unrecognized postretirement obligations
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance			(701)	(372)
Other comprehensive (loss) income, before income taxes			(3)	0
Income taxes			1	0
Other comprehensive income (loss) recognized during the period			(2)	0
Losses (gains) reclassified to earnings			8	(10)
Income taxes			(2)	2
Losses (gains) reclassified to earnings, net of income taxes			6	(8)
Other comprehensive income (loss), net of income taxes			4	(8)
Ending balance	(697)	(380)	(697)	(380)
Total AOCI
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(854)	(651)	(839)	(508)
Other comprehensive income (loss), net of income taxes	19	27	4	(116)
Ending balance	$ (835)	$ (624)	$ (835)	$ (624)