Share Based Compensation - Outstanding Options and Rights (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 5.4	$ 5.1	$ 10.8	$ 8.6
Tax benefit from share-based compensation expense	1.4	1.3	2.6	2.2
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Tax benefit from share-based compensation expense	$ 1.4	$ 1.3	$ 2.6	$ 2.2