Share-based Payments (Compensation Costs) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total compensation costs related to share based payments	$ 15.1	$ 12.7
Selling, general and administrative:
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock option compensation expense	1.5	2.6
Equity-classified share units	8.3	3.5
Liability-classified share units	1.3	0.0
Employee share purchase plan	2.9	0.6
Total compensation costs related to share based payments	14.0	6.7
Acquisition-related and integration costs:
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Acceleration of share-based payments expense	0.9	5.0
Share-based continuing employment costs	0.2	1.0
Total compensation costs related to share based payments	$ 1.1	$ 6.0