Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Millions	Total	Common stock and capital in excess of par value	Accumulated other comprehensive income	Retained earnings	Treasury Stock	Noncontrolling interests
Beginning Balance at Dec. 31, 2017	$ 351,954	$ 35,702	$ 58,571	$ 255,786	$ (1,763)	$ 3,658
Adoption of new accounting pronouncements	(71)		(61,375)	61,304
Net earnings (loss)	(1,071)			(1,138)		67
Other comprehensive income, net	335		327			8
Issuance (acquisition) of common stock	24	24
Transactions with noncontrolling interests	(119)	(37)				(82)
Ending Balance at Mar. 31, 2018	351,052	35,689	(2,477)	315,952	(1,763)	3,651
Beginning Balance at Dec. 31, 2017	351,954	35,702	58,571	255,786	(1,763)	3,658
Net earnings (loss)	29,713
Other comprehensive income, net	(1,152)
Ending Balance at Sep. 30, 2018	379,419	35,721	(3,927)	346,503	(2,691)	3,813
Beginning Balance at Mar. 31, 2018	351,052	35,689	(2,477)	315,952	(1,763)	3,651
Net earnings (loss)	12,077			12,011		66
Other comprehensive income, net	(1,363)		(1,331)			(32)
Issuance (acquisition) of common stock	8	8
Transactions with noncontrolling interests	(16)	5				(21)
Ending Balance at Jun. 30, 2018	361,758	35,702	(3,808)	327,963	(1,763)	3,664
Net earnings (loss)	18,707			18,540		167
Other comprehensive income, net	(124)		(119)			(5)
Issuance (acquisition) of common stock	(906)	22			(928)
Transactions with noncontrolling interests	(16)	(3)				(13)
Ending Balance at Sep. 30, 2018	379,419	35,721	(3,927)	346,503	(2,691)	3,813
Beginning Balance at Dec. 31, 2018	352,500	35,715	(5,015)	321,112	(3,109)	3,797
Net earnings (loss)	21,732			21,661		71
Other comprehensive income, net	310		288			22
Issuance (acquisition) of common stock	(1,677)	13			(1,690)
Transactions with noncontrolling interests	(274)	(98)				(176)
Ending Balance at Mar. 31, 2019	372,591	35,630	(4,727)	342,773	(4,799)	3,714
Beginning Balance at Dec. 31, 2018	352,500	35,715	(5,015)	321,112	(3,109)	3,797
Net earnings (loss)	52,562
Other comprehensive income, net	(396)
Ending Balance at Sep. 30, 2019	401,558	35,620	(5,408)	373,334	(5,937)	3,949
Beginning Balance at Mar. 31, 2019	372,591	35,630	(4,727)	342,773	(4,799)	3,714
Net earnings (loss)	14,173			14,073		100
Other comprehensive income, net	45		49			(4)
Issuance (acquisition) of common stock	(435)	8			(443)
Transactions with noncontrolling interests	17	(20)				37
Ending Balance at Jun. 30, 2019	386,391	35,618	(4,678)	356,846	(5,242)	3,847
Net earnings (loss)	16,657			16,524		133
Other comprehensive income, net	(751)		(730)			(21)
Issuance (acquisition) of common stock	(695)				(695)
Transactions with noncontrolling interests and other	(44)	2		(36)		(10)
Ending Balance at Sep. 30, 2019	$ 401,558	$ 35,620	$ (5,408)	$ 373,334	$ (5,937)	$ 3,949