Long-Term Debt - Schedule of Long-Term Debt Instruments (Details) £ in Millions, $ in Millions, $ in Millions	Mar. 31, 2024 USD ($)	Mar. 31, 2024 GBP (£)	Mar. 31, 2024 CAD ($)	Mar. 31, 2024 AUD ($)	Dec. 31, 2023 USD ($)
Long Term Debt
Total long-term debt	$ 1,677,200,000				$ 1,629,200,000
Less: current portion	(215,300,000)				(209,700,000)
Net long-term debt	1,461,900,000				1,419,500,000
U.S. credit agreement — revolving credit line
Long Term Debt
Total long-term debt	0				0
U.K. credit agreement — revolving credit line
Long Term Debt
Total long-term debt	80,800,000	£ 64.0			0
3.50% senior subordinated notes due 2025
Long Term Debt
Total long-term debt	$ 548,000,000.0				547,700,000
Interest rate	3.50%	3.50%	3.50%	3.50%
3.75% senior subordinated notes due 2029
Long Term Debt
Total long-term debt	$ 496,000,000.0				495,800,000
Interest rate	3.75%	3.75%	3.75%	3.75%
Canada credit agreement
Long Term Debt
Total long-term debt	$ 82,700,000		$ 112.0		81,500,000
Australia credit agreement
Long Term Debt
Total long-term debt	65,100,000			$ 100.0	62,700,000
Mortgage facilities
Long Term Debt
Total long-term debt	359,000,000.0				402,100,000
Other
Long Term Debt
Total long-term debt	$ 45,600,000				$ 39,400,000