Long-Term Debt - Schedule of Long-Term Debt Instruments (Details) £ in Millions, $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2025 USD ($)	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2025 GBP (£)	Dec. 31, 2024 USD ($)
Long Term Debt
Total long-term debt	$ 1,571.0	$ 1,571.0			$ 1,852.0
Less: current portion	(305.4)	(305.4)			(721.2)
Net long-term debt	1,265.6	1,265.6			1,130.8
Repayment of debt		550.0	$ 0.0
U.S. credit agreement — revolving credit line
Long Term Debt
Total long-term debt	0.0	0.0			0.0
U.K. credit agreement — revolving credit line
Long Term Debt
Total long-term debt	$ 40.3	$ 40.3		£ 30.0	$ 171.4
3.50% senior subordinated notes due 2025
Debt Instrument [Line Items]
Interest rate	3.50%	3.50%		3.50%	3.50%
Long Term Debt
Total long-term debt	$ 0.0	$ 0.0			$ 549.1
Repayment of debt	$ 550.0
3.75% senior subordinated notes due 2029
Debt Instrument [Line Items]
Interest rate	3.75%	3.75%		3.75%	3.75%
Long Term Debt
Total long-term debt	$ 497.1	$ 497.1			$ 496.6
Mortgage facilities
Long Term Debt
Total long-term debt	735.1	735.1			474.8
Other debt
Long Term Debt
Total long-term debt	$ 298.5	$ 298.5			$ 160.1