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Stock and Stock-Based Compensation Plans (Tables)

9 Months Ended

Sep. 30, 2024

Share-Based Payment Arrangement [Abstract]

Summary of stock-based compensation expense by type of award

The following table summarizes our stock-based compensation expense by type of award (in millions):

			Three Months Ended September 30,												Nine Months Ended September 30,
			2024						2023						2024						2023
PRSUs			$	1.5					$	1.5					$	6.7					$	3.4
RSUs			1.7						1.9						6.8						7.1
Service options			0.2						0.2						0.5						0.5
Market options			0.4						0.6						(0.1)						2.1
Total stock-based compensation expense			$	3.8					$	4.2					$	13.9					$	13.1

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- Definition

Tabular disclosure of the amount of total share-based compensation cost, including the amounts attributable to each share-based compensation award.

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