Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2024

Fair Value Measurements

Fair values of financial and non-financial assets and liabilities

	Fair Value Measurements
			Quoted Prices in		Significant		Significant
			Active Markets		Observable		Unobservable
			for Identical		Inputs		Inputs
2024	Total		Assets (Level 1)		(Level 2)		(Level 3)
Short-term investments	$	18.4	$	—	$	18.4	$	—
Long-term investments		0.3		—		0.3		—
Forward contracts		(1.1)		—		(1.1)		—
Redeemable noncontrolling interests		(8.7)		—		—		(8.7)
Total	$	8.9	$	—	$	17.6	$	(8.7)
2023
Short-term investments	$	185.2	$	—	$	185.2	$	—
Long-term investments		0.4		—		0.4		—
Forward contracts		(0.5)		—		(0.5)		—
Redeemable noncontrolling interests		(30.7)		—		—		(30.7)
Total	$	154.4	$	—	$	185.1	$	(30.7)