Consolidated Statements of Equity - USD ($) $ in Millions	Total	Common Stock	Add'l Paid in Capital	Retained Earnings (Accumulated Deficit)	Accumulated Other Comp Loss	Unearned ESOP	Treasury Stock	Non-controlling Interests
Beginning balance at Dec. 31, 2018	$ 95,900	$ 8	$ 81,976	$ 30,257	$ (12,394)	$ (134)	$ (5,421)	$ 1,608
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative Effect Of New Accounting Principle	(111)			(111)
Net (loss) income	412			322				90
Other comprehensive (loss) income	(621)				(633)			12
Dividends	(1,389)		(224)	(1,165)
Common stock issued/sold	76		76
Stock-based compensation and allocation of ESOP shares	201		173	(1)		29
Distributions to non-controlling interests	(18)							(18)
Purchases of treasury stock	(2,040)						(2,040)
Retirement of treasury stock				(7,461)			7,461
Spin-off of Dow and Corteva	(50,487)		(30,843)	(30,123)	11,498	$ 105		(1,124)
Other	(11)	(1)	(3)	(7)
Ending balance at Sep. 30, 2019	41,912	7	51,155	(8,289)	(1,529)			568
Beginning balance at Jun. 30, 2019	42,576	7	51,129	(8,299)	(831)			570
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	377			372				5
Other comprehensive (loss) income	(699)				(698)			(1)
Common stock issued/sold	9		9
Stock-based compensation and allocation of ESOP shares	19		20	(1)
Distributions to non-controlling interests	(6)							(6)
Purchases of treasury stock	(359)						(359)
Retirement of treasury stock				(359)			359
Other	(5)		(3)	(2)
Ending balance at Sep. 30, 2019	41,912	7	51,155	(8,289)	(1,529)			568
Beginning balance at Dec. 31, 2019	41,556	7	50,796	(8,400)	(1,416)			569
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative Effect Of New Accounting Principle	(3)			(3)
Net (loss) income	(3,153)			(3,173)				20
Other comprehensive (loss) income	556				557			(1)
Dividends	(662)		(662)
Common stock issued/sold	34		34
Stock-based compensation and allocation of ESOP shares	81		81
Distributions to non-controlling interests	(48)							(48)
Purchases of treasury stock	(232)						(232)
Retirement of treasury stock				(232)			$ 232
Other	(11)		(30)					19
Ending balance at Sep. 30, 2020	38,118	7	50,219	(11,808)	(859)			559
Beginning balance at Jun. 30, 2020	37,577	7	50,191	(11,728)	(1,465)			572
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(72)			(79)				7
Other comprehensive (loss) income	610				606			4
Stock-based compensation and allocation of ESOP shares	24		24
Distributions to non-controlling interests	(38)							(38)
Other	17		4	(1)				14
Ending balance at Sep. 30, 2020	$ 38,118	$ 7	$ 50,219	$ (11,808)	$ (859)			$ 559