Share-Based Compensation - Schedule of Share-Based Payment Arrangement Activity Expensed (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total share-based compensation expense, before tax	$ 12.4	$ 13.2	$ 24.8	$ 27.0
Income tax benefit	(3.0)	(3.2)	(6.0)	(6.5)
Total share-based compensation expense, after tax	9.4	10.0	18.8	20.5
Stock options
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total share-based compensation expense, before tax	0.2	0.4	0.3	0.8
Restricted stock units
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total share-based compensation expense, before tax	4.9	4.6	9.5	8.6
Restricted stock awards
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total share-based compensation expense, before tax	0.1	0.3	0.3	0.7
Performance based restricted share unit awards
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total share-based compensation expense, before tax	$ 7.2	$ 7.9	$ 14.7	$ 16.9