Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 26, 2023
Statement of Comprehensive Income [Abstract]
Net earnings	$ 1,545	$ 1,689
Postretirement benefit plans
Amortization of actuarial losses and prior service credits, net of tax of $5 million in 2024 and $10 million in 2023	19	(37)
Other, net, net of tax of $0 million in 2024 and $4 million in 2023	(27)	(26)
Other comprehensive (loss), net of tax	(8)	(63)
Comprehensive income	$ 1,537	$ 1,626