Long-Term Debt - Summary (Details) £ in Millions, $ in Millions, $ in Millions	Mar. 31, 2023 USD ($)	Mar. 31, 2023 GBP (£)	Mar. 31, 2023 AUD ($)	Dec. 31, 2022 USD ($)
Long Term Debt
Total long-term debt	$ 1,701.3			$ 1,622.1
Less: current portion	(81.5)			(75.2)
Net long-term debt	1,619.8			1,546.9
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	0.0	£ 0.0		24.2
3.50% senior subordinated notes due 2025
Long Term Debt
Total long-term debt	$ 546.5			546.2
Interest rate	3.50%	3.50%	3.50%
3.75% senior subordinated notes due 2029
Long Term Debt
Total long-term debt	$ 495.2			495.1
Interest rate	3.75%	3.75%	3.75%
Australia credit agreement
Long Term Debt
Total long-term debt	$ 26.2		$ 75.0	21.6
Mortgage facilities
Long Term Debt
Total long-term debt	590.9			494.3
Other
Long Term Debt
Total long-term debt	$ 42.5			$ 40.7