Long-Term Debt - Schedule of Long-Term Debt Instruments (Details) £ in Millions, $ in Millions	Mar. 31, 2025 USD ($)	Mar. 31, 2025 GBP (£)	Dec. 31, 2024 USD ($)
Long Term Debt
Total long-term debt	$ 1,771.5		$ 1,852.0
Less: current portion	(778.5)		(721.2)
Net long-term debt	993.0		1,130.8
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	$ 82.7	£ 64.0	$ 171.4
3.50% senior subordinated notes due 2025
Debt Instrument [Line Items]
Interest rate	3.50%	3.50%	3.50%
Long Term Debt
Total long-term debt	$ 549.5		$ 549.1
3.75% senior subordinated notes due 2029
Debt Instrument [Line Items]
Interest rate	3.75%	3.75%	3.75%
Long Term Debt
Total long-term debt	$ 496.8		$ 496.6
Mortgage facilities
Long Term Debt
Total long-term debt	428.4		474.8
Other debt
Long Term Debt
Total long-term debt	$ 214.1		$ 160.1