Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2024

Fair Value Disclosures [Abstract]

Schedule of Financial Assets Measured at Fair Value on Recurring Basis

The following table presents a summary of financial assets, which were measured at fair value on a recurring basis.

	June 30, 2024						December 31, 2023
	Fair Value		Leveling				Fair Value		Leveling
(in millions)			Level 1		Level 2				Level 1		Level 2
Cash and money market funds	$	139.7	$	139.7	$	—	$	251.1	$	251.1	$	—
Restricted cash	8.0		8.0		—		8.0		8.0		—
Commercial paper	57.2		—		57.2		53.5		—		53.5
Corporate debt securities	1,004.9		—		1,004.9		867.2		—		867.2
Securities of government-sponsored entities	474.9		—		474.9		547.3		—		547.3
Equity security investments	143.6		143.6		—		161.9		161.9		—
	$	1,828.3	$	291.3	$	1,537.0	$	1,889.0	$	421.0	$	1,468.0