Long-Term Debt - Schedule of Long-Term Debt Instruments (Details) £ in Millions, $ in Millions, $ in Millions, $ in Millions	Jun. 30, 2024 USD ($)	Jun. 30, 2024 GBP (£)	Jun. 30, 2024 CAD ($)	Jun. 30, 2024 AUD ($)	Dec. 31, 2023 USD ($)
Long Term Debt
Total long-term debt	$ 1,766.3				$ 1,629.2
Less: current portion	(171.7)				(209.7)
Net long-term debt	1,594.6				1,419.5
U.S. credit agreement — revolving credit line
Long Term Debt
Total long-term debt	0.0				0.0
U.K. credit agreement — revolving credit line
Long Term Debt
Total long-term debt	118.9	£ 94.0			0.0
3.50% senior subordinated notes due 2025
Long Term Debt
Total long-term debt	$ 548.4				547.7
Interest rate	3.50%	3.50%	3.50%	3.50%
3.75% senior subordinated notes due 2029
Long Term Debt
Total long-term debt	$ 496.2				495.8
Interest rate	3.75%	3.75%	3.75%	3.75%
Canada credit agreement
Long Term Debt
Total long-term debt	$ 83.0		$ 113.5		81.5
Australia credit agreement
Long Term Debt
Total long-term debt	21.0			$ 100.0	62.7
Mortgage facilities
Long Term Debt
Total long-term debt	453.7				402.1
Other
Long Term Debt
Total long-term debt	$ 45.1				$ 39.4