Debt (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Other Long-term Debt, Current	$ 9.4	$ 10.7
Other Long-term Debt, Noncurrent	51.1	51.4
Long-term Debt and Lease Obligation, Current	424.5	64.8
Long-term Debt and Lease Obligation	3,969.7	4,018.7
Finance Lease, Liability, Noncurrent	62.1	95.0
Finance Lease, Liability, Current	40.6	48.3
Long-Term Debt, Maturity, Year One	376.7
Long-Term Debt, Maturity, Year Two	305.9
Long-Term Debt, Maturity, Year Three	568.8
Long-Term Debt, Maturity, Year Four	930.0
Long-Term Debt, Maturity, Year Five	900.0
Debt, Long-term and Short-term, Combined Amount	4,394.2
Gains (Losses) on Extinguishment of Debt	0.0	11.8	$ 2.6
Cash flows from operating activities
Debt Instrument [Line Items]
Gains (Losses) on Extinguishment of Debt	4.6
Senior Unsecured Notes Due 2021 [Member] [Domain]
Debt Instrument [Line Items]
Long-term Debt, Gross	0.0
Debt, Long-term and Short-term, Combined Amount	0.0
Secured Debt Term B [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	580.6
Secured Long-term Debt, Noncurrent	564.3	565.2
Long-term Debt	5.8	5.8
Debt, Long-term and Short-term, Combined Amount	$ 570.1
Senior Unsecured Notes Due 2023 [Member] [Domain]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.95%
Long-term Debt, Gross	$ 0.0
Debt, Long-term and Short-term, Combined Amount	0.0
Senior Unsecured Notes Due 2028 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 700.0
Debt Instrument, Interest Rate, Stated Percentage	4.60%
Long-term Debt	$ 0.0	0.0
Unsecured Long-term Debt, Noncurrent	697.3	696.6
Debt, Long-term and Short-term, Combined Amount	697.3
Senior Secured Notes Due 2026 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	300.0
Secured Long-term Debt, Noncurrent	$ 299.5	299.1
Debt Instrument, Interest Rate, Stated Percentage	3.85%
Long-term Debt	$ 0.0	0.0
Debt, Long-term and Short-term, Combined Amount	299.5
Senior Secured Notes Due 2025
Debt Instrument [Line Items]
Secured Long-term Debt, Noncurrent	$ 0.0	20.8
Debt Instrument, Interest Rate, Stated Percentage	5.50%
Long-term Debt	$ 20.8	0.0
Debt, Long-term and Short-term, Combined Amount	20.8
Senior secured first lien notes due 2029
Debt Instrument [Line Items]
Debt Instrument, Face Amount	900.0
Secured Long-term Debt, Noncurrent	$ 889.9	888.4
Debt Instrument, Interest Rate, Stated Percentage	9.375%
Long-term Debt	$ 0.0	0.0
Debt, Long-term and Short-term, Combined Amount	889.9
Exchangeable Notes Due 2028
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 230.0
Debt Instrument, Interest Rate, Stated Percentage	3.25%
Long-term Debt	$ 0.0	0.0
Unsecured Long-term Debt, Noncurrent	223.6	222.2
Debt, Long-term and Short-term, Combined Amount	223.6
Senior Secured Second Lien Notes due 2030
Debt Instrument [Line Items]
Debt Instrument, Face Amount	1,200.0
Secured Long-term Debt, Noncurrent	$ 1,181.9	1,180.0
Debt Instrument, Interest Rate, Stated Percentage	9.75%
Long-term Debt	$ 0.0	$ 0.0
Debt, Long-term and Short-term, Combined Amount	1,181.9
Delayed-Draw Bridge Credit Agreement
Debt Instrument [Line Items]
Debt Instrument, Face Amount	350.0
Long-term Debt	347.9
Debt, Long-term and Short-term, Combined Amount	$ 347.9