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Long-Term Debt -Fair Value of Long-Term Debt (Details) (USD $)
In Millions, unless otherwise specified |
Sep. 30, 2014
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Dec. 31, 2013
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Jul. 31, 2013
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Apr. 29, 2013
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Term Loan [Member]
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| Fair Value [Line Items] | |||||||
| Long-term Debt, Weighted Average Interest Rate | 3.25% | [1] | |||||
| Debt, short-term and long-term | $ 1,517.4 | $ 1,528.9 | |||||
| Discount, Unamortized | 3.9 | 4.4 | 1.4 | 3.4 | |||
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Senior notes due 2019 [Member]
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| Fair Value [Line Items] | |||||||
| Long-term Debt, Weighted Average Interest Rate | 8.50% | [1] | |||||
| Debt, short-term and long-term | 1,045.3 | 1,305.0 | |||||
| Premium, unamortized | 2.9 | 4.2 | |||||
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Carrying (Reported) Amount, Fair Value Disclosure [Member]
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| Fair Value [Line Items] | |||||||
| Debt, short-term and long-term | 3,162.7 | ||||||
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Fair Value, Inputs, Level 2 [Member]
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| Fair Value [Line Items] | |||||||
| Long-term Debt, fair value disclosures | $ 3,213.3 | ||||||
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