Financing Agreement - Debt Instruments (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023	Nov. 16, 2023	Dec. 31, 2022	Jul. 31, 2018
Debt Instrument [Line Items]
Weighted-average interest rate as of December 31	5.77%	5.67%		5.33%
Long-term debt	$ 2,032.0	$ 1,858.2		$ 1,990.9
Present value of lease payments	8.1
Unamortized debt issuance costs and discounts	(14.8)	(14.3)
Total financing obligations	2,072.4	1,908.4
Less: Current financing obligations	434.3	54.0
Total long-term financing obligations	$ 1,638.1	1,854.4
Incremental term loan facility
Debt Instrument [Line Items]
Average interest rate	5.76%
Long-term line of credit	$ 282.0	228.2
Senior Notes | Senior Unsecured Notes 4.23 Percent, Due July 2028
Debt Instrument [Line Items]
Interest rate, stated percentage	4.48%
Long-term debt	$ 350.0	350.0			$ 350.0
Senior Notes | Public Senior Note Six Point Nine Five Percent Due March Twenty Twenty-Nine
Debt Instrument [Line Items]
Interest rate, stated percentage	6.95%		6.95%
Long-term debt	$ 500.0	500.0
Finance lease obligations
Debt Instrument [Line Items]
Weighted-average interest rate as of December 31	5.23%
Present value of lease payments	$ 8.1	10.3
Notes payable and other
Debt Instrument [Line Items]
Interest rate, stated percentage	4.28%
Notes payable and other | Notes Payable 3.50 Percent Due June 2027
Debt Instrument [Line Items]
Long-term debt	$ 47.1	54.2
Long-term Debt
Debt Instrument [Line Items]
Interest rate at period end	6.04%
Long-term line of credit	$ 500.0	780.0
Unsecured Debt | Incremental Term Loan Facility | Line of Credit
Debt Instrument [Line Items]
Interest rate at period end	6.17%
Line of Credit, Current	$ 400.0	$ 0.0