Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 26, 2023	Mar. 27, 2022
Statement of Comprehensive Income [Abstract]
Net earnings	$ 1,689	$ 1,733
Postretirement benefit plans
Amortization of actuarial losses and prior service credits, net of tax of $10 million in 2023 and $13 million in 2022	(37)	48
Other, net, net of tax of $4 million in 2023 and $1 million in 2022	(26)	(21)
Other comprehensive (loss) income, net of tax	(63)	27
Comprehensive income	$ 1,626	$ 1,760