Debt (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Other Long-term Debt, Current	$ 10.7	$ 5.8
Other Long-term Debt, Noncurrent	51.4	53.0
Long-term Debt and Lease Obligation, Current	64.8	53.7
Long-term Debt and Lease Obligation	4,018.7	3,814.9
Finance Lease, Liability, Noncurrent	95.0	102.3
Finance Lease, Liability, Current	48.3	42.2
Long-Term Debt, Maturity, Year One	5.9
Long-Term Debt, Maturity, Year Two	26.8
Long-Term Debt, Maturity, Year Three	305.9
Long-Term Debt, Maturity, Year Four	568.8
Long-Term Debt, Maturity, Year Five	930.0
Debt, Long-term and Short-term, Combined Amount	4,083.5
Gains (Losses) on Extinguishment of Debt	11.8	2.6	$ 0.0
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	586.6
Secured Long-term Debt, Noncurrent	565.2	566.0
Long-term Debt	5.8	5.7
Debt, Long-term and Short-term, Combined Amount	$ 571.0
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	696.6	695.9
Debt, Long-term and Short-term, Combined Amount	696.6
Senior Secured Notes Due 2026 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	300.0
Secured Long-term Debt, Noncurrent	$ 299.1	298.8
Debt Instrument, Interest Rate, Stated Percentage	3.85%
Long-term Debt	$ 0.0	0.0
Debt, Long-term and Short-term, Combined Amount	299.1
Senior Secured Notes Due 2025
Debt Instrument [Line Items]
Secured Long-term Debt, Noncurrent	$ 20.8	20.7
Debt Instrument, Interest Rate, Stated Percentage	5.50%
Long-term Debt	$ 0.0	0.0
Debt, Long-term and Short-term, Combined Amount	20.8
Senior Secured Second Lien Notes Due 2025
Debt Instrument [Line Items]
Secured Long-term Debt, Noncurrent	$ 0.0	1,191.0
Debt Instrument, Interest Rate, Stated Percentage	750.00%
Long-term Debt	$ 0.0	0.0
Debt, Long-term and Short-term, Combined Amount	0.0
Senior secured first lien notes due 2029
Debt Instrument [Line Items]
Debt Instrument, Face Amount	900.0
Secured Long-term Debt, Noncurrent	$ 888.4	887.2
Debt Instrument, Interest Rate, Stated Percentage	9.375%
Long-term Debt	$ 0.0	0.0
Debt, Long-term and Short-term, Combined Amount	888.4
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	222.2	0.0
Debt, Long-term and Short-term, Combined Amount	222.2
Senior Secured Second Lien Notes due 2030
Debt Instrument [Line Items]
Debt Instrument, Face Amount	1,200.0
Secured Long-term Debt, Noncurrent	$ 1,180.0	0.0
Debt Instrument, Interest Rate, Stated Percentage	9.75%
Long-term Debt	$ 0.0	$ 0.0
Debt, Long-term and Short-term, Combined Amount	$ 1,180.0