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Stock and Stock-Based Compensation Plans (Tables)

6 Months Ended

Jun. 30, 2025

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 June 30,												Six Months Ended June 30,
			2025						2024						2025						2024
PRSUs			$	1.6					$	1.4					$	2.1					$	5.2
RSUs			2.3						2.2						6.0						5.1
Service options			0.1						0.2						—						0.3
Market options			0.1						(0.3)						(2.3)						(0.5)
Total stock-based compensation expense			$	4.1					$	3.5					$	5.8					$	10.1

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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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