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		799			799
Cash dividends declared		(276)			(276)
Equity-based awards		6		(52)		58
Shares purchased		(257)				(257)
Other comprehensive income		67					67
Ending balance at Apr. 01, 2018		11,774	482	2,820	27,605	(15,742)	(3,391)
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)

[1] Reflects the cumulative effect 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.