Share-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2024

Share-Based Payment Arrangement [Abstract]

Costs Associated with Share-Based Compensation Plans

The following table summarizes the costs associated with the Company’s share-based compensation plans:

	Three Months Ended March 31,
(in millions)	2024		2023
Expense:
RSUs	$	18.9	$	19.0
PRSUs		2.4		1.8
Employee stock purchase plan		2.1		2.2
	$	23.4	$	23.0

Summary of RSU and PSRU Activity

The following table summarizes RSU and PRSU activity for the three months ended March 31, 2024:

(in millions, except weighted-average grant-date fair value)	Shares			Weighted-average grant-date fair value
Unvested at December 31, 2023		1.0		$	64.19
Granted during 2024		0.6		$	58.92
Vested during 2024		(0.6	)	$	60.84
Unvested at March 31, 2024		1.0		$	62.77