EID Segment FN Segment reconciliation (Details) - USD ($) $ in Millions		3 Months Ended			9 Months Ended
		Sep. 30, 2021		Sep. 30, 2020	Sep. 30, 2021		Sep. 30, 2020
Segment Reporting Information [Line Items]
(Benefit from) provision for income taxes on continuing operations		$ (28)		$ (117)	$ 434		$ 88
Income from continuing operations before income taxes		8		(507)	2,101		745
Interest income		19		11	58		38
Interest Expense		8		11	22		35
Exchange (gains) losses - net	[1]	2		(67)	(47)		(127)
Significant Items		(21)		49	214		351
Corporate Expenses		40		27	106		81
Segment operating EBITDA		(11)		(152)	2,420		1,932
Mark-to-market gain (loss) on certain foreign currency contracts not designated as hedges				27
EID [Member]
Segment Reporting Information [Line Items]
Income from Continuing Operations After Taxes		27		(404)	1,637		595
(Benefit from) provision for income taxes on continuing operations		(30)		(122)	425		68
Income from continuing operations before income taxes		(3)		(526)	2,062		663
Depreciation and Amortization		309		285	926		868
Interest Expense		19		30	61		117
Non-operating benefits - net		(315)		(73)	(941)		(237)
Significant Items		(21)		49	214		351
Corporate Expenses		40		27	106		81
Segment operating EBITDA		(11)		(152)	2,420		1,932
Mark-to-market gain (loss) on certain foreign currency contracts not designated as hedges		19	[2]	(8)	(3)	[2]	19
Segment Reconciling Items [Member]
Segment Reporting Information [Line Items]
Depreciation and Amortization		309		285	926		868
Interest income		(19)		(11)	(58)		(38)
Exchange (gains) losses - net		(2)		67	47		127
Significant Items		21		(49)	(214)		(351)
Mark-to-market gain (loss) on certain foreign currency contracts not designated as hedges	[3]	19			(3)
Segment Reconciling Items [Member] | EID [Member]
Segment Reporting Information [Line Items]
Interest income		(19)		(11)	(58)		(38)
Exchange (gains) losses - net		(2)		67	47		127
Hedging Program [Member]
Segment Reporting Information [Line Items]
Exchange (gains) losses - net		34		(6)	0		173
Hedging Program [Member] | Argentine Peso Devaluation [Member]
Segment Reporting Information [Line Items]
Exchange (gains) losses - net		(16)		(26)	(53)		(56)
Corporate | Segment Reconciling Items [Member]
Segment Reporting Information [Line Items]
Significant Items		(9)		0	(65)		(46)
Crop Protection [Member]
Segment Reporting Information [Line Items]
Segment operating EBITDA		206		130	897		677
Crop Protection [Member] | Segment Reconciling Items [Member]
Segment Reporting Information [Line Items]
Significant Items		$ (8)		$ (40)	$ (51)		$ (151)

[1] Includes net pre-tax exchange losses of $(16) million and $(53) million associated with the devaluation of the Argentine peso for the three and nine months ended September 30, 2021, respectively, and $(26) million and $(56) million for the three and nine months ended September 30, 2020, respectively.

[2] Effective January 1, 2021, on a prospective basis, the company excludes net unrealized gain or loss from mark-to-market activity for certain foreign currency derivative instruments that do not qualify for hedge accounting. For the three and six months ended September 30, 2020, the unrealized mark-to-market (loss) gain was $(8) million and $19 million, respectively.

[3] Effective January 1, 2021, on a prospective basis, the company excludes net unrealized gain or loss from mark-to-market activity for certain foreign currency derivative instruments that do not qualify for hedge accounting. For the three and nine months ended September 30, 2020, the unrealized mark-to-market (loss) gain was $(8) million and $19 million, respectively. Refer to page 57 for further discussion of the company’s Non-GAAP financial measures.