Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 24, 2018	Jun. 30, 2019	Jun. 24, 2018
Statement of Comprehensive Income [Abstract]
Net earnings	$ 1,420	$ 1,163	$ 3,124	$ 2,320
Other comprehensive income, net of tax
Recognition of previously deferred postretirement benefit plan amounts	227	300	454	600
Other, net	28	(106)	28	(48)
Other comprehensive income, net of tax	255	194	482	552
Comprehensive income	$ 1,675	$ 1,357	$ 3,606	$ 2,872