Long-term Debt - Long-term Debt Outstanding (Details) - USD ($) $ in Millions	Jun. 30, 2020	May 31, 2020	Dec. 31, 2019
Schedule of Outstanding Long-term Debt
Finance lease obligations	$ 377.3		$ 384.1
Total debt and finance lease obligations	3,583.6		3,062.6
Less: Current portion	(36.9)		(39.3)
Long-term debt, net of current portion	$ 3,546.7		3,023.3
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Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	us-gaap:LongTermDebtAndCapitalLeaseObligations
Term loan facilities \| Term loan facilities
Schedule of Outstanding Long-term Debt
Total debt	$ 258.0		$ 265.2
Senior Notes \| 5.125% Senior Notes due 2023
Schedule of Outstanding Long-term Debt
Debt instrument interest rate (percent)	5.125%		5.125%
Total debt	$ 297.7		$ 297.3
Senior Notes \| 5.75% Senior Notes due 2024
Schedule of Outstanding Long-term Debt
Debt instrument interest rate (percent)	5.75%		5.75%
Total debt	$ 697.6		$ 697.3
Senior Notes \| 5.75% Senior Notes due 2025
Schedule of Outstanding Long-term Debt
Debt instrument interest rate (percent)	5.75%		5.75%
Total debt	$ 346.0		$ 345.6
Senior Notes \| 4.50% Senior Notes due 2028
Schedule of Outstanding Long-term Debt
Debt instrument interest rate (percent)	4.50%	4.50%	4.50%
Total debt	$ 784.1		$ 491.7
Senior Notes \| 4.75% Senior Notes due 2030
Schedule of Outstanding Long-term Debt
Debt instrument interest rate (percent)	4.75%	4.75%	4.75%
Total debt	$ 782.5		$ 491.7
Other notes payable
Schedule of Outstanding Long-term Debt
Total debt	40.4		44.7
Revolving Credit Facility
Schedule of Outstanding Long-term Debt
Total debt	$ 0.0		$ 45.0

Amount of short-term and long-term debt and lease obligation.

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