Share-Based Compensation - Allocation of Compensation Expense (Benefit) by Plan (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2025	Mar. 31, 2024
Share-Based Compensation
Total share-based compensation expense before tax	$ 31.8	$ 25.6
Stock options
Share-Based Compensation
Total share-based compensation expense before tax	8.5	5.7
RSUs
Share-Based Compensation
Total share-based compensation expense before tax	23.4	15.5
STAP awards
Share-Based Compensation
Total share-based compensation expense before tax	(0.8)	3.9
ESPP
Share-Based Compensation
Total share-based compensation expense before tax	$ 0.7	$ 0.5

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details