Consolidated Statements of Equity - USD ($) $ in Millions	Total	Common   Stock	Additional  Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive  Loss	Total Stockholders’ Equity	Noncontrolling Interests in Subsidiary
Beginning Balance at Dec. 31, 2017	$ (776)	$ 284	$ 0	$ 11,405	$ (12,539)	$ (850)	$ 74
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	5,046			5,046		5,046
Other comprehensive loss, net of tax	626				626	626
Repurchases of common stock	(1,492)	(5)	(404)	(1,083)		(1,492)
Dividends declared	(2,342)			(2,342)		(2,342)
Stock-based awards, ESOP activity and other	406	2	404			406
Reclassification of income tax effects from tax reform	0			2,408	(2,408)
Net decrease in noncontrolling interests in subsidiary	(19)						(19)
Ending Balance at Dec. 31, 2018	1,449	281	0	15,434	(14,321)	1,394	55
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	6,230			6,230		6,230
Other comprehensive loss, net of tax	(1,233)				(1,233)	(1,233)
Repurchases of common stock	(1,200)	(4)	(483)	(713)		(1,200)
Dividends declared	(2,550)			(2,550)		(2,550)
Stock-based awards, ESOP activity and other	486	3	483			486
Net decrease in noncontrolling interests in subsidiary	(11)						(11)
Ending Balance at Dec. 31, 2019	3,171	280	0	18,401	(15,554)	3,127	44
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	6,833			6,833		6,833
Other comprehensive loss, net of tax	(567)				(567)	(567)
Repurchases of common stock	(1,100)	(3)	(256)	(841)		(1,100)
Dividends declared	(2,757)			(2,757)		(2,757)
Stock-based awards, ESOP activity and other	479	2	477			479
Net decrease in noncontrolling interests in subsidiary	(21)						(21)
Ending Balance at Dec. 31, 2020	$ 6,038	$ 279	$ 221	$ 21,636	$ (16,121)	$ 6,015	$ 23