Share-Based Compensation -Stock Option And Nominal Strike Price Options Narrative (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended	12 Months Ended
	Jun. 30, 2021	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate intrinsic value of share options exercised		$ 0.2	$ 6.3	$ 34.8
2007 Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average period (in years)		1 year 1 month 6 days
Unrecognized compensation cost related to grants under the PRSUs		$ 7.6
Share Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted (in shares)		0	0	0
Unrecognized compensation cost related to unvested stock options		$ 0.1
Weighted-average period (in years)		1 month 6 days
Nominal Strike Price Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate intrinsic value of share options exercised		$ 0.9	$ 3.9	$ 8.4
Grant date fair value	$ 170.82