Consolidated Statements of Equity - USD ($) $ in Millions	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Total Stockholders’ Equity (Deficit)	Noncontrolling Interests in Subsidiary
Beginning Balance at Dec. 31, 2015	$ 3,097	$ 303	$ 0	$ 14,238	$ (11,444)	$ 3,097	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	5,173			5,173		5,173
Other comprehensive income (loss), net of tax	(658)				(658)	(658)
Shares exchanged and retired in connection with divestiture of IS&GS business	(2,497)	(9)		(2,488)		(2,497)
Repurchases of common stock	(2,096)	(9)	(395)	(1,692)		(2,096)
Dividends declared	(2,036)			(2,036)		(2,036)
Stock-based awards, ESOP activity and other	399	4	395			399
Net decrease in noncontrolling interests in subsidiary	(95)						(95)
Ending Balance at Dec. 31, 2016	1,477	289	0	13,195	(12,102)	1,382	95
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	1,963			1,963		1,963
Other comprehensive income (loss), net of tax	(437)				(437)	(437)
Repurchases of common stock	(2,001)	(7)	(398)	(1,596)		(2,001)
Dividends declared	(2,157)			(2,157)		(2,157)
Stock-based awards, ESOP activity and other	400	2	398			400
Net decrease in noncontrolling interests in subsidiary	(21)						(21)
Ending 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 income (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	2,400			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