Long-Term Debt -Debt Balances and Interest Rates (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014		Dec. 31, 2013	Jul. 31, 2013	Apr. 29, 2013
Debt Instrument [Line Items]
Debt, total short-term and long-term	$ 3,172.4		$ 3,251.2
Current maturities of long-term debt	(15.4)		(45.4)
Debt	3,157.0		3,205.8
Revolving Loan [Member]
Debt Instrument [Line Items]
Debt, short-term and long-term	0		0
Long-term Debt, weighted average interest rate	0.00%	[1]
Term Loan [Member]
Debt Instrument [Line Items]
Debt, short-term and long-term	1,525.1		1,528.9
Discount, Unamortized	(4.2)		(4.4)	(1.4)	(3.4)
Long-term Debt, weighted average interest rate	3.25%	[1]
Senior Secured Notes, due 2018 [Member]
Debt Instrument [Line Items]
Debt, short-term and long-term	325.0		325.0
Long-term Debt, weighted average interest rate	8.00%	[1]
2019 Senior Notes, due 2019 [Member]
Debt Instrument [Line Items]
Debt, short-term and long-term	1,280.0		1,305.0
Premium, unamortized	4.0		4.2
Long-term Debt, weighted average interest rate	8.50%	[1]
Subordinated Debt [Member]
Debt Instrument [Line Items]
Debt, short-term and long-term	$ 42.5		$ 92.5
Long-term Debt, weighted average interest rate	12.535%	[1]

[1] Interest rate at March 31, 2014