Accumulated Other Comprehensive Income (Loss) ("AOCI") (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 03, 2020	Apr. 03, 2020	Jul. 03, 2020	Jun. 28, 2019
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	$ 22,027	$ 22,744	$ 22,744	$ 3,412
Other comprehensive loss, before income taxes			(140)	(661)
Income taxes			20	165
Other comprehensive loss			(120)	(496)
Amounts reclassified to earnings from AOCI, before income taxes			4
Income taxes			0
Amounts reclassified to earnings from AOCI	6	(2)	4
Ending balance	22,226	22,027	22,226	3,363
Foreign currency translation
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance		(81)	(81)	(107)
Other comprehensive loss, before income taxes			(60)	1
Income taxes			0	0
Other comprehensive loss			(60)	1
Amounts reclassified to earnings from AOCI, before income taxes			7
Income taxes			0
Amounts reclassified to earnings from AOCI			7
Ending balance	(134)		(134)	(106)
Net unrealized losses on hedging derivatives
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance		(55)	(55)	(19)
Other comprehensive loss, before income taxes			(80)	(26)
Income taxes			20	7
Other comprehensive loss			(60)	(19)
Amounts reclassified to earnings from AOCI, before income taxes			7
Income taxes			(2)
Amounts reclassified to earnings from AOCI			5
Ending balance	(110)		(110)	(38)
Unrecognized postretirement obligations
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance		(372)	(372)	(85)
Other comprehensive loss, before income taxes			0	(636)
Income taxes			0	158
Other comprehensive loss			0	(478)
Amounts reclassified to earnings from AOCI, before income taxes			(10)
Income taxes			2
Amounts reclassified to earnings from AOCI			(8)
Ending balance	(380)		(380)	(563)
Total AOCI
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(651)	(508)	(508)	(211)
Amounts reclassified to earnings from AOCI	6	(2)
Ending balance	$ (624)	$ (651)	$ (624)	$ (707)