Consolidated Statement of Shareholders' Equity (Unaudited) - USD ($) $ in Millions	Total	Common Stock, Par	Common Stock, Surplus	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Loss
Beginning balance at Dec. 31, 2018	$ 11,732	$ 482	$ 2,946	$ 29,326	$ (17,244)	$ (3,778)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	745			745
Cash dividends declared	(290)			(290)
Equity-based awards	38		(9)		47
Shares purchased	(86)				(86)
Other comprehensive income	95					95
Ending balance at Mar. 31, 2019	12,234	482	2,937	29,781	(17,283)	(3,683)
Beginning balance at Dec. 31, 2019	13,577	482	3,039	31,633	(17,358)	(4,219)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	706			706
Cash dividends declared	(319)			(319)
Equity-based awards	26		(24)		50
Shares purchased	(501)				(501)
Other comprehensive income	(252)					(252)
Ending balance at Mar. 29, 2020	$ 13,200	$ 482	$ 3,015	$ 31,983	$ (17,809)	$ (4,471)