Note 6 - Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 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		$	727.8			$	—			$	—			$	—			$	727.8
Current investments:
Consolidated VIEs			238.7				474.7				—				—				713.4
Other investments			292.4				31.2				9.0				30.1				362.7
Total current investments			531.1				505.9				9.0				30.1				1,076.1
Other			—				9.3				1.8				—				11.1
Total assets		$	1,258.9			$	515.2			$	10.8			$	30.1			$	1,815.0
Liabilities:
Long-term debt⁽²⁾		$	—			$	386.5			$	—			$	—			$	386.5
Deferred bonuses			—				—				46.2				—				46.2
Contingent consideration			—				—				33.9				—				33.9
Other			2.0				5.7				—				—				7.7
Total liabilities		$	2.0			$	392.2			$	80.1			$	—			$	474.3

		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:
Long-term debt⁽²⁾		$	—			$	383.3			$	—			$	—			$	383.3
Deferred bonuses			—				—				115.7				—				115.7
Contingent consideration			—				—				30.4				—				30.4
Other			1.9				11.7				—				—				13.6
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*
		*March 31,*
		*2025*				*2024*
Beginning of period fair value		$	4.5			$	1.1
Fair value adjustments			(0.7	)			0.6
Purchases (sales) of securities, net			7.0				—
End of period fair value		$	10.8			$	1.7

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

		*Three months ended*
		*March 31,*
		*2025*				*2024*
Beginning of period fair value		$	146.1			$	117.6
Fair value adjustments			2.8				5.5
Settlement of contingent consideration			(0.3	)			—
Vesting of deferred bonuses			(87.1	)			(81.5	)
Amortization of deferred bonuses			15.3				17.6
Foreign currency translation			1.7				(0.2	)
Additions			1.6				—
End of period fair value		$	80.1			$	59.0

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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