Income Taxes Income Taxes - Reconciliation to US Statutory Rate (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount		$ 354
Statutory U.S. federal income tax rate		21.00%
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount	[1]	$ 5
State and Local Income Taxes - net	[1]	0.30%
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount	[2]	$ 74
Impact of Brazil valuation allowance	[2]	4.40%
Effective Income Tax Rate Reconciliation, GILTI, Amount		$ 24
Effective Income Tax Rate Reconciliation, GILTI, Percent		1.40%
Effective Income Tax Rate Reconciliation, Cross-Border, Other, Amount		$ 12
Effective Income Tax Rate Reconciliation, Cross-Border, Other, Percent		0.70%
Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount		$ (47)
U.S. research and development credit		(2.80%)
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Amount		$ 31
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent		1.80%
Unrecognized Tax Benefits		$ (19)
Unrecognized Tax Benefits, Period Increase (Decrease), Percent		(1.10%)
Effective Income Tax Rate Reconciliation, Capital Loss, Amount	[2]	$ (77)
Effective Income Tax Rate Reconciliation, Capital Loss, Percent	[2]	(4.60%)
Effective Income Tax Rate Reconciliation, Legal Entity Tax Characterization, Amount	[3]	$ (49)
Effective Income Tax Rate Reconciliation, Legal Entity Tax Characterization, Percent	[3]	(2.90%)
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount		$ (22)
Other, net		(1.30%)
Provision for (benefit from) income taxes on continuing operations		$ 484	$ 412	$ 152
Effective Income Tax Rate Reconciliation, Percent		28.70%
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent			32.30%	13.90%
Continuing Operations [Member]
Statutory U.S. federal income tax rate			21.00%	21.00%
State and Local Income Taxes - net			1.30%	0.90%
Effective tax rates on international operations - net	[4]		4.80%	(1.80%)
Exchange gains/losses	[5]		1.70%	2.00%
Impact of Brazil valuation allowance	[6]		9.40%	0.00%
U.S. research and development credit			(4.70%)	(5.90%)
Other, net			0.10%	(0.10%)
Provision for (benefit from) income taxes on continuing operations		$ 484	$ 412	$ 152
Acquisitions, divestitures, and ownership restructuring activities	[7]		(1.10%)	3.60%
Impact of Swiss Tax Changes	[8]		0.00%	(7.90%)
Excess tax benefits (tax deficiency) from stock-compensation			(0.20%)	(0.50%)
Tax settlements and expiration of statue of limitations			(1.70%)	(0.30%)
Repatriation of Foreign Earnings	[9]		1.70%	2.90%
Deferred Other Tax Expense (Benefit)			$ (62)
Continuing Operations [Member] | Tax Currency Change
Other Tax (Benefit) Expense			(24)
Continuing Operations [Member] | Intellectual Property Realigment
Other Tax (Benefit) Expense			46
Continuing Operations [Member] | Brazil Valuation Allowance [Member] | Seed [Member]
Other Tax (Benefit) Expense			$ 120
Continuing Operations [Member] | Brazil Valuation Allowance [Member] | Crop Protection [Member]
Other Tax (Benefit) Expense		132
ARGENTINA
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount		$ (17)
Effective tax rates on international operations - net		(1.00%)
Effective Income Tax Rate Reconciliaiton, Witholding Tax, Amount		$ 18
Effective Income Tax Rate Reconciliation, Withholding Tax, Percent		1.10%
Effective Income Tax Rate Reconciliation, Foreign Currency Exchange Gains (Losses), Amount		$ (31)
Exchange gains/losses		(1.80%)
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount		$ 73
Impact of Brazil valuation allowance		4.30%
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount		$ (3)
Other, net		(0.20%)
BRAZIL
Effective Income Tax Rate Reconciliaiton, Witholding Tax, Amount		$ 37
Effective Income Tax Rate Reconciliation, Withholding Tax, Percent		2.20%
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount	[10]	$ 153
Impact of Brazil valuation allowance	[10]	9.10%
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount		$ (4)
Other, net		(0.20%)
INDIA
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount		$ 17
Effective tax rates on international operations - net		1.00%
Effective Income Tax Rate Reconciliaiton, Witholding Tax, Amount		$ 31
Effective Income Tax Rate Reconciliation, Withholding Tax, Percent		1.80%
Effective Income Tax Rate Reconciliaiton, Agriculture Exemption, Amount		$ (41)
Effective Income Tax Rate Reconciliation, Agriculture Exemption, Percent		(2.40%)
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount		$ 1
Other, net		0.10%
SWITZERLAND
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount		$ (91)
Effective tax rates on international operations - net		(5.40%)
Effective Income Tax Rate Reconciliation, Cantonal Income Tax, Amount		$ 59
Effective Income Tax Rate Reconciliation, Cantonal Income Tax, Percent		3.50%
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount		$ (1)
Other, net		(0.10%)
Foreign Tax Jurisdiction, Other
Effective Income Tax Rate Reconciliation, Tax Credit, Amount		$ (52)
Effective Income Tax Rate Reconciliation, Tax Credit, Percent		(3.10%)
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount		$ 49
Other, net		2.90%
UNITED STATES
Effective Income Tax Rate Reconciliation, Capital Loss, Amount		$ 27
Effective Income Tax Rate Reconciliation, Legal Entity Tax Characterization, Amount		$ 49

[1] State taxes in Minnesota made up the majority (greater than 50%) of the tax effect in this category.

[2] For the year ended December 31, 2025, a U.S. federal tax benefit of $(27) million, net of valuation allowance, was recorded to recognize a capital loss in a wholly owned foreign investment.

[3] For the year ended December 31, 2025, a U.S. federal deferred tax benefit was recorded associated with a change in a legal entity's U.S. tax characterization in the amount of $(49) million.

[4] Includes the effects of local and U.S. taxes related to earnings of non-U.S. subsidiaries, changes in the amount of unrecognized tax benefits associated with these earnings, losses at non-U.S. subsidiaries without local tax benefits due to valuation allowances, and other permanent differences between tax and U.S. GAAP results.

[5] Principally reflects the impact of foreign exchange gains and losses on net monetary assets for which no corresponding tax impact is realized. Further information about the company's foreign currency hedging program is included in Note 6 - Supplementary Information, and Note 19 - Financial Instruments, to the Consolidated Financial Statements, under the heading "Foreign Currency Risk."

[6] For the year ended December 31, 2024, a charge of $120 million was recorded to establish a valuation allowance against the net deferred tax asset position ofa legal entity in Brazil (Seed business).

[7]     Includes net tax charge of $46 million for the year ended December 31, 2023, associated with intellectual property realignment.

[8] Includes net tax benefits of $(62) million and $(24) million for the year ended December 31, 2023, related to changes in deferred taxes and a tax currency change, respectively.

[9] Includes the effect of withholding tax on distribution of foreign earnings to the U.S., net of U.S. foreign tax credits.

[10] For the year ended December 31, 2025, the company established a valuation allowance recorded against the net deferred tax asset position of a legal entity in Brazil (Crop Protection business) in the amount of $132 million.