Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 26, 2021	Sep. 27, 2020	Sep. 26, 2021	Sep. 27, 2020
Statement of Comprehensive Income [Abstract]
Net earnings	$ 614	$ 1,698	$ 4,266	$ 5,041
Postretirement benefit plans
Net actuarial gain recognized due to plan remeasurements, net of $613 million tax	2,258	0	2,258	0
Pension settlement charge	1,310	0	1,310	0
Amortization of previously deferred postretirement benefit plan costs	107	110	387	330
Other, net	(55)	34	(51)	(35)
Other comprehensive income, net of tax	3,620	144	3,904	295
Comprehensive income	$ 4,234	$ 1,842	$ 8,170	$ 5,336