Consolidated Statement of Shareholders' Equity (Unaudited) - USD ($) $ in Millions		Total	Common Stock, Par	Common Stock, Surplus	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Loss
Cumulative-effect adjustments	[1]	$ 0			$ 638		$ (638)
Beginning balance at Dec. 31, 2017		11,435	$ 482	$ 2,872	26,444	$ (15,543)	(2,820)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings		2,436			2,436
Cash dividends declared		(827)			(827)
Equity-based awards		137		42		95
Shares purchased		(523)				(523)
Other comprehensive income		97					97
Ending balance at Sep. 30, 2018		12,755	482	2,914	28,691	(15,971)	(3,361)
Beginning balance at Jul. 01, 2018		11,994	482	2,865	28,115	(15,910)	(3,558)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings		851			851
Cash dividends declared		(275)			(275)
Equity-based awards		75		49		26
Shares purchased		(87)				(87)
Other comprehensive income		197					197
Ending balance at Sep. 30, 2018		12,755	482	2,914	28,691	(15,971)	(3,361)
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		2,464			2,464
Cash dividends declared		(881)			(881)
Equity-based awards		135		53		82
Shares purchased		(184)				(184)
Other comprehensive income		247					247
Ending balance at Sep. 29, 2019		13,513	482	2,999	30,909	(17,346)	(3,531)
Beginning balance at Jun. 30, 2019		12,877	482	2,959	30,291	(17,379)	(3,476)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings		913			913
Cash dividends declared		(295)			(295)
Equity-based awards		73		40		33
Shares purchased		0				0
Other comprehensive income		(55)					(55)
Ending balance at Sep. 29, 2019		$ 13,513	$ 482	$ 2,999	$ 30,909	$ (17,346)	$ (3,531)

[1] Reflects the cumulative effects of Accounting Standards Update (ASU) 2016-01, Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities, and ASU 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income, which we adopted on January 1, 2018