Long-Term and Other Debt - Maturities of Debt (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Total long-term debt outstanding	$ 9,164.4
2019	45.0
2020	610.9
2021	382.3
2022	2,241.7
2023	41.7
After 2023	5,842.8
Unamortized deferred financing costs and discount/premium	(127.5)
Total long-term debt outstanding	9,036.9	$ 8,776.6
Senior Notes
Debt Instrument [Line Items]
Total long-term debt outstanding	4,108.0
2019	0.0
2020	0.0
2021	0.0
2022	2,200.0
2023	0.0
After 2023	1,908.0
Senior Subordinated Notes
Debt Instrument [Line Items]
Total long-term debt outstanding	584.1
2019	0.0
2020	243.5
2021	340.6
2022	0.0
2023	0.0
After 2023	0.0
Capital Lease Obligations
Debt Instrument [Line Items]
Total long-term debt outstanding	4.0
2019	3.3
2020	0.7
2021	0.0
2022	0.0
2023	0.0
After 2023	0.0
Revolver and Term Loans | Secured Debt
Debt Instrument [Line Items]
Total long-term debt outstanding	4,468.3
2019	41.7
2020	366.7
2021	41.7
2022	41.7
2023	41.7
After 2023	$ 3,934.8