Long-Term and Other Debt - Maturities of Debt (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Total long-term debt outstanding	$ 8,869.4
2018	40.5
2019	35.8
2020	626.3
2021	373.4
2022	4,332.8
After 2022	3,460.6
Unamortized deferred financing costs and discount/premium	(92.8)
Total long-term debt outstanding	8,776.6	$ 8,074.2
Senior Notes
Debt Instrument [Line Items]
Total long-term debt outstanding	4,650.0
2018	0.0
2019	0.0
2020	0.0
2021	0.0
2022	4,300.0
After 2022	350.0
Senior Subordinated Notes
Debt Instrument [Line Items]
Total long-term debt outstanding	584.1
2018	0.0
2019	0.0
2020	243.5
2021	340.6
2022	0.0
After 2022	0.0
Capital Lease Obligations
Debt Instrument [Line Items]
Total long-term debt outstanding	10.7
2018	7.7
2019	3.0
2020	0.0
2021	0.0
2022	0.0
After 2022	0.0
Revolver and Term Loans | Secured Debt
Debt Instrument [Line Items]
Total long-term debt outstanding	3,624.6
2018	32.8
2019	32.8
2020	382.8
2021	32.8
2022	32.8
After 2022	$ 3,110.6