Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 29, 2019	Sep. 30, 2018	Sep. 29, 2019	Sep. 30, 2018
Statement of Comprehensive Income [Abstract]
Net earnings	$ 1,608	$ 1,473	$ 4,732	$ 3,793
Other comprehensive income, net of tax
Recognition of previously deferred postretirement benefit plan amounts	227	300	681	900
Other, net	(41)	18	(13)	(30)
Other comprehensive income, net of tax	186	318	668	870
Comprehensive income	$ 1,794	$ 1,791	$ 5,400	$ 4,663