Share-Based Compensation - Schedule of Share-Based Payment Arrangement Activity Expensed (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation expense, before tax	$ 7.0	$ 12.4	$ 21.2	$ 24.8
Income tax benefit	(1.7)	(3.0)	(5.1)	(6.0)
Share-based compensation expense, after tax	5.3	9.4	16.1	18.8
Stock options
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation expense, before tax	0.0	0.2	0.0	0.3
Restricted stock units
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation expense, before tax	3.4	4.9	8.2	9.5
Restricted stock awards
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation expense, before tax	0.0	0.1	0.0	0.3
Performance based restricted share unit awards
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation expense, before tax	3.6	7.2	11.9	14.7
Cash-settled restricted stock
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation expense, before tax	$ 0.0	$ 0.0	$ 1.1	$ 0.0