Long-Term Debt (Details) $ in Millions		12 Months Ended
	Feb. 15, 2022	Dec. 31, 2021 USD ($) facility	Dec. 31, 2021 GBP (£)	Dec. 31, 2021 AUD ($)	Jun. 30, 2021 USD ($)	Jun. 24, 2021 USD ($)	Dec. 31, 2020 USD ($)
Long Term Debt
Total long-term debt		$ 1,474,000,000					$ 1,689,600,000
Less: current portion		(82,000,000.0)					(87,500,000)
Net long-term debt		1,392,000,000					1,602,100,000
Scheduled maturities of long-term debt for each of the next five years and thereafter
2022		82,000,000.0
2023		21,100,000
2024		31,700,000
2025		604,800,000
2026		18,700,000
2027 and thereafter		715,700,000
Total long-term debt		1,474,000,000					1,689,600,000
U.S. credit agreement — revolving credit line
Long Term Debt
Total long-term debt		0					108,000,000.0
Maximum credit available		800,000,000
Maximum amount available for letters of credit		50,000,000
Future borrowings available for foreign acquisitions		$ 150,000,000
Incremental interest rate for uncollateralized borrowings in excess of borrowing base (as a percent)		1.25%
Scheduled maturities of long-term debt for each of the next five years and thereafter
Total long-term debt		$ 0					108,000,000.0
U.S. credit agreement — revolving credit line | LIBOR
Long Term Debt
Line of credit basis spread on variable rate (as a percent)		1.75%
U.S. credit agreement — revolving credit line | LIBOR | Subsequent Event
Long Term Debt
Line of credit basis spread on variable rate (as a percent)	1.50%
U.K. credit agreement — revolving credit line
Long Term Debt
Total long-term debt		$ 0					0
Maximum credit available | £			£ 150,000,000
Additional facility capacity under accordion feature | £			100,000,000
Scheduled maturities of long-term debt for each of the next five years and thereafter
Total long-term debt		$ 0					0
U.K. credit agreement — revolving credit line | Minimum | LIBOR
Long Term Debt
Line of credit basis spread on variable rate (as a percent)		1.10%
U.K. credit agreement — revolving credit line | Maximum | LIBOR
Long Term Debt
Line of credit basis spread on variable rate (as a percent)		2.10%
U.K. credit agreement — overdraft line of credit
Long Term Debt
Total long-term debt		$ 0					0
Maximum credit available | £			52,000,000
Amount of demand overdraft lines of credit available during specified time periods each year | £			£ 40,000,000
Scheduled maturities of long-term debt for each of the next five years and thereafter
Total long-term debt		0					0
3.50% senior subordinated notes due 2025
Debt Instrument
Principal amount		$ 550,000,000
Interest rate (as a percent)		3.50%	3.50%	3.50%
Long Term Debt
Total long-term debt		$ 544,700,000					543,200,000
Scheduled maturities of long-term debt for each of the next five years and thereafter
Total long-term debt		$ 544,700,000					543,200,000
3.50% senior subordinated notes due 2025 | Debt Instrument Redemption Period Prior To September 2022
Long Term Debt
Percentage of principal amount at which the entity may redeem the notes		100.00%
Specified equity offerings, percentage of debt which may be redeemed		103.50%
3.50% senior subordinated notes due 2025 | Minimum | Debt Instrument Redemption Period Prior To September 2022
Long Term Debt
Percentage of principal amount at which the entity may redeem the notes		40.00%
5.50% senior subordinated notes due 2026 redeemed June 24, 2021
Debt Instrument
Principal amount		$ 500,000,000
Interest rate (as a percent)		5.50%	5.50%	5.50%
Long Term Debt
Total long-term debt		$ 0					496,400,000
Scheduled maturities of long-term debt for each of the next five years and thereafter
Total long-term debt		$ 0					$ 496,400,000
3.75% senior subordinated notes due 2029
Debt Instrument
Interest rate (as a percent)		3.75%	3.75%	3.75%			3.75%
Long Term Debt
Total long-term debt		$ 494,300,000					$ 0
Scheduled maturities of long-term debt for each of the next five years and thereafter
Total long-term debt		$ 494,300,000					0
3.75% senior subordinated notes due 2029 | Debt Redemption, Prior To June 12, 2024
Long Term Debt
Percentage of principal amount at which the entity may redeem the notes		100.00%
3.75% senior subordinated notes due 2029 | Debt Redemption Prior to May 15, 2021
Long Term Debt
Specified equity offerings, percentage of debt which may be redeemed		103.75%
3.75% senior subordinated notes due 2029 | Minimum | Debt Instrument Redemption Period Prior To September 2022
Long Term Debt
Percentage of principal amount at which the entity may redeem the notes		40.00%
Australia capital loan agreement
Long Term Debt
Total long-term debt		$ 26,600,000					32,100,000
Maximum credit available				$ 50.0
Number of facilities | facility		2
Debt term		5 years
Call period		90 days
Maximum amount of debt guaranteed by the Company's U.S. parent company				50.0
Balance outstanding under credit agreement				36.6
Scheduled maturities of long-term debt for each of the next five years and thereafter
Total long-term debt		$ 26,600,000					32,100,000
Australia capital loan agreement | Australian BBSW 30-Day Bill Rate
Long Term Debt
Line of credit basis spread on variable rate (as a percent)		3.00%
Base rate of interest on loans		30-day Bill Rate
Australia working capital loan agreement
Long Term Debt
Total long-term debt		$ 0					0
Maximum credit available				50.0
Debt term		1 year
Call period		90 days
Maximum amount of debt guaranteed by the Company's U.S. parent company				$ 50.0
Scheduled maturities of long-term debt for each of the next five years and thereafter
Total long-term debt		$ 0					0
Australia working capital loan agreement | Australian BBSW 30-Day Bill Rate
Long Term Debt
Line of credit basis spread on variable rate (as a percent)		3.00%
Base rate of interest on loans		30-day Bill Rate
Mortgage facilities
Long Term Debt
Total long-term debt		$ 353,800,000					458,100,000
Scheduled maturities of long-term debt for each of the next five years and thereafter
Total long-term debt		353,800,000					458,100,000
Other
Long Term Debt
Total long-term debt		54,600,000					51,800,000
Scheduled maturities of long-term debt for each of the next five years and thereafter
Total long-term debt		$ 54,600,000					$ 51,800,000
Senior Subordinated Notes
Long Term Debt
Domestic Subsidiaries ownership guaranteeing obligations (as a percent)		100.00%	100.00%	100.00%
Change of control, redemption price as a percentage of principal		101.00%
Sale of assets, redemption price as percentage of principal		100.00%
Senior Subordinated Notes | 3.75% senior subordinated notes due 2029
Debt Instrument
Principal amount					$ 500,000,000
Interest rate (as a percent)					3.75%
Senior Subordinated Notes | 5.50% Senior Subordinated Notes Due 2026
Debt Instrument
Interest rate (as a percent)						5.50%
Repayment of debt						$ 500,000,000