Long-Term Debt -Debt Balances and Interest Rates (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2014 Revolving Loan [Member]		Dec. 31, 2013 Revolving Loan [Member]	Sep. 30, 2014 Term Loan [Member]		Dec. 31, 2013 Term Loan [Member]	Jul. 31, 2013 Term Loan [Member]	Apr. 29, 2013 Term Loan [Member]	Sep. 30, 2014 Senior Secured Notes, due 2018 [Member]		Dec. 31, 2013 Senior Secured Notes, due 2018 [Member]	Sep. 30, 2014 Senior notes due 2019 [Member]		Dec. 31, 2013 Senior notes due 2019 [Member]	Sep. 30, 2014 Senior Notes due 2022 [Member]		Dec. 31, 2013 Senior Notes due 2022 [Member]	Aug. 05, 2014 Senior Notes [Member]	Sep. 30, 2014 Subordinated Debt [Member]		Dec. 31, 2013 Subordinated Debt [Member]	Sep. 30, 2014 LIBOR [Member] Term Loan [Member]
Debt Instrument [Line Items]
Debt, short-term and long-term			$ 0		$ 0	$ 1,517.4		$ 1,528.9			$ 0		$ 325.0	$ 1,045.3		$ 1,305.0	$ 600.0		$ 0	$ 600.0	$ 0		$ 92.5
Discount, Unamortized						(3.9)		(4.4)	(1.4)	(3.4)
Premium, unamortized														2.9		4.2
Debt, total short-term and long-term	3,161.7	3,251.2
Current maturities of long-term debt	(15.4)	(45.4)
Debt	$ 3,146.3	$ 3,205.8
Long-term Debt, Weighted Average Interest Rate			0.00%	[1]		3.25%	[1]				0.00%	[1]		8.50%	[1]		6.00%	[1]			0.00%	[1]		3.25%	[1]

[1] Interest rate at September 30, 2014