Long-term Debt - Table 2 (Details) - USD ($) $ in Millions	Jun. 30, 2016	Dec. 31, 2015
Long-term Debt by Maturity
Total debt and capital lease obligations	$ 3,086.5	$ 3,171.5
Face Amount [Member]
Long-term Debt by Maturity
July1 through December 31, 2016	18.2
2017	36.8
2018	37.2
2019	40.1
2020	834.2
2021	10.7
Thereafter	2,179.4
Total debt and capital lease obligations	3,156.6
Net Amount [Member]
Long-term Debt by Maturity
July1 through December 31, 2016	18.2
2017	36.8
2018	37.2
2019	40.0
2020	783.5
2021	10.7
Thereafter	2,160.1
Total debt and capital lease obligations	$ 3,086.5