Share-based Payments (Compensation Costs) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total compensation costs related to share based payments	$ 57.5	$ 44.5	$ 33.9
Selling, general and administrative:
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock option compensation expense	7.7	12.2	8.4
Equity-classified share units	32.0	22.0	12.6
Liability-classified share units	2.5	0.0	(0.6)
Employee share purchase plan	4.7	2.8	2.7
Total compensation costs related to share based payments	46.9	37.0	23.1
Acquisition-related and integration costs:
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Acceleration of share-based payments expense	6.8	0.0	0.0
Share-based continuing employment costs	3.8	7.5	10.8
Total compensation costs related to share based payments	$ 10.6	$ 7.5	$ 10.8