Consolidated Statement of Shareholders' Equity - USD ($) $ in Millions	Total	Common Stock	Common Stock Surplus	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Loss
Beginning Balance at Dec. 31, 2016	$ 10,301	$ 482	$ 2,819	$ 24,543	$ (14,156)	$ (3,387)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	2,912			2,912
Cash dividends declared	(1,008)			(1,008)
Equity-based awards	199		53		146
Shares purchased	(1,533)				(1,533)
Other comprehensive income (loss)	567					567
Ending 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	3,345			3,345
Cash dividends declared	(1,101)			(1,101)
Equity-based awards	179		74		105
Shares purchased	(1,806)				(1,806)
Other comprehensive income (loss)	(320)					(320)
Ending 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	3,484			3,484
Cash dividends declared	(1,177)			(1,177)
Equity-based awards	163		93		70
Shares purchased	(184)				(184)
Other comprehensive income (loss)	(441)					(441)
Ending Balance at Dec. 31, 2019	$ 13,577	$ 482	$ 3,039	$ 31,633	$ (17,358)	$ (4,219)