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Note 6 - Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2025

Notes Tables

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

		*Fair value measurements using:*
		*Quoted prices*
		*in active*				*Significant*
		*markets for*				*other*				*Significant*				*Investments*
		*identical assets*				*observable*				*unobservable*				*valued at*
		*and liabilities*				*inputs*				*inputs*				*practical*
		*(Level 1)*				*(Level 2)*				*(Level 3)*				expedient⁽¹⁾				*Total*
Assets:
Cash equivalents		$	657.3			$	—			$	—			$	—			$	657.3
Current investments:
Consolidated VIEs			515.8				551.7				—				—				1,067.5
Other investments			322.4				24.5				28.6				20.4				395.9
Total current investments			838.2				576.2				28.6				20.4				1,463.4
Other			—				2.3				2.8				—				5.1
Total assets		$	1,495.5			$	578.5			$	31.4			$	20.4			$	2,125.8
Liabilities:
Seed hedge derivatives		$	—			$	10.3			$	—			$	—			$	10.3
Long-term debt⁽²⁾			—				404.8				—				—				404.8
Deferred bonuses			—				—				92.6				—				92.6
Contingent consideration			—				—				24.5				—				24.5
Warrants			—				26.0				—				—				26.0
Other			4.6				2.5				18.6				—				25.7
Total liabilities		$	4.6			$	443.6			$	135.7			$	—			$	583.9

		*Fair value measurements using:*
		*Quoted prices*
		*in active*				*Significant*
		*markets for*				*other*				*Significant*				*Investments*
		*identical assets*				*observable*				*unobservable*				*valued at*
		*and liabilities*				*inputs*				*inputs*				*practical*
		*(Level 1)*				*(Level 2)*				*(Level 3)*				expedient⁽¹⁾				*Total*
Assets:
Cash equivalents		$	821.7			$	—			$	—			$	—			$	821.7
Current investments:
Consolidated VIEs			260.6				241.5				—				—				502.1
Other investments			273.8				33.7				2.0				27.6				337.1
Total current investments			534.4				275.2				2.0				27.6				839.2
Other			—				10.2				2.5				—				12.7
Total assets		$	1,356.1			$	285.4			$	4.5			$	27.6			$	1,673.6
Liabilities:
Seed hedge derivatives		$	—			$	8.5			$	—			$	—			$	8.5
Long-term debt⁽²⁾			—				383.3				—				—				383.3
Deferred bonuses			—				—				115.7				—				115.7
Contingent consideration			—				—				30.4				—				30.4
Other			1.9				3.2				—				—				5.1
Total liabilities		$	1.9			$	395.0			$	146.1			$	—			$	543.0

Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

		*Three months ended*								*Nine months ended*
		*September 30,*								*September 30,*
		*2025*				*2024*				*2025*				*2024*
Beginning of period fair value		$	25.3			$	4.0			$	4.5			$	1.1
Fair value adjustments			2.5				(2.0	)			3.0				0.2
Transfers from Level 1			—				—				—				0.7
Transfers from practical expedient			—				—				9.4				—
Purchases (sales) of securities, net			3.6				11.8				14.5				11.8
End of period fair value		$	31.4			$	13.8			$	31.4			$	13.8

Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

		*Three months ended*								*Nine months ended*
		*September 30,*								*September 30,*
		*2025*				*2024*				*2025*				*2024*
Beginning of period fair value		$	110.3			$	76.3			$	146.1			$	117.6
Fair value adjustments			9.3				3.9				5.2				11.6
Settlements			(1.0	)			—				(1.6	)			—
Vesting of deferred bonuses			(1.0	)			0.1				(88.6	)			(84.2	)
Amortization of deferred bonuses			18.2				18.4				51.3				53.9
Foreign currency translation			(0.1	)			2.2				2.7				2.0
Additions			—				4.4				20.6				4.4
End of period fair value		$	135.7			$	105.3			$	135.7			$	105.3

Tabular disclosure of the fair value measurement of assets using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income (loss), and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset.

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