Fair Value of Financial Instruments (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Financial assets and liabilities accounted for at fair value on a recurring basis
Total current assets	$ 1,186.1us-gaap_AssetsCurrent	$ 1,262.9us-gaap_AssetsCurrent
Total current liabilities	1,011.3us-gaap_LiabilitiesCurrent	1,125.4us-gaap_LiabilitiesCurrent
Total non-current liabilities	1,981.2us-gaap_LiabilitiesNoncurrent	2,068.9us-gaap_LiabilitiesNoncurrent
Senior Notes 9.50% due 2018
Financial assets and liabilities accounted for at fair value on a recurring basis
Debt instruments at fair value		423.1
Senior Notes 8.50% due 2020
Financial assets and liabilities accounted for at fair value on a recurring basis
Debt instruments at fair value	651.6	677.6
Senior notes 5.875% due 2022
Financial assets and liabilities accounted for at fair value on a recurring basis
Debt instruments at fair value	309.1	303.9
Term loan A
Financial assets and liabilities accounted for at fair value on a recurring basis
Debt instruments at fair value	327.8	161.9
Term loan B
Financial assets and liabilities accounted for at fair value on a recurring basis
Debt instruments at fair value	165.0	0
Fair value measurement on recurring basis \| Level 1
Financial assets and liabilities accounted for at fair value on a recurring basis
Assets, Noncurrent	0
Total current assets	0	0
Total current liabilities	0	0
Total non-current liabilities	0	0
Fair value measurement on recurring basis \| Level 1 \| Foreign currency exchange contracts
Financial assets and liabilities accounted for at fair value on a recurring basis
Derivative Asset, Current	0	0
Derivative liabilities, current	0	0
Fair value measurement on recurring basis \| Level 1 \| Commodity contracts
Financial assets and liabilities accounted for at fair value on a recurring basis
Derivative Asset, Current		0
Derivative liabilities, current	0	0
Non-current derivative liabilities at fair value	0
Fair value measurement on recurring basis \| Level 1 \| Interest Rate Swap [Member]
Financial assets and liabilities accounted for at fair value on a recurring basis
Derivative Asset, Current	0
Derivative liabilities, current	0
Non-current derivative liabilities at fair value	0	0
Fair value measurement on recurring basis \| Level 2
Financial assets and liabilities accounted for at fair value on a recurring basis
Assets, Noncurrent	0.8
Total current assets	2.1	3.1
Total current liabilities	11.2	1.5
Total non-current liabilities	4.7	14.9
Fair value measurement on recurring basis \| Level 2 \| Foreign currency exchange contracts
Financial assets and liabilities accounted for at fair value on a recurring basis
Derivative Asset, Current	2.1	2.9
Derivative liabilities, current	7.9	1.1
Fair value measurement on recurring basis \| Level 2 \| Commodity contracts
Financial assets and liabilities accounted for at fair value on a recurring basis
Derivative Asset, Current		0.2
Derivative liabilities, current	1.0	0.4
Non-current derivative liabilities at fair value	0.4
Fair value measurement on recurring basis \| Level 2 \| Interest Rate Swap [Member]
Financial assets and liabilities accounted for at fair value on a recurring basis
Derivative Asset, Current	0.8
Derivative liabilities, current	2.3
Non-current derivative liabilities at fair value	4.3	14.9
Fair value measurement on recurring basis \| Level 3
Financial assets and liabilities accounted for at fair value on a recurring basis
Assets, Noncurrent	0
Total current assets	0	0
Total current liabilities	0	0
Total non-current liabilities	0	0
Fair value measurement on recurring basis \| Level 3 \| Foreign currency exchange contracts
Financial assets and liabilities accounted for at fair value on a recurring basis
Derivative Asset, Current	0	0
Derivative liabilities, current	0	0
Fair value measurement on recurring basis \| Level 3 \| Commodity contracts
Financial assets and liabilities accounted for at fair value on a recurring basis
Derivative Asset, Current		0
Derivative liabilities, current	0	0
Non-current derivative liabilities at fair value	0
Fair value measurement on recurring basis \| Level 3 \| Interest Rate Swap [Member]
Financial assets and liabilities accounted for at fair value on a recurring basis
Derivative Asset, Current	0
Derivative liabilities, current	0
Non-current derivative liabilities at fair value	0	0
Fair value measurement on recurring basis \| Total
Financial assets and liabilities accounted for at fair value on a recurring basis
Assets, Noncurrent	0.8
Total current assets	2.1	3.1
Total current liabilities	11.2	1.5
Total non-current liabilities	4.7	14.9
Fair value measurement on recurring basis \| Total \| Foreign currency exchange contracts
Financial assets and liabilities accounted for at fair value on a recurring basis
Derivative Asset, Current	2.1	2.9
Derivative liabilities, current	7.9	1.1
Fair value measurement on recurring basis \| Total \| Commodity contracts
Financial assets and liabilities accounted for at fair value on a recurring basis
Derivative Asset, Current		0.2
Derivative liabilities, current	1.0	0.4
Non-current derivative liabilities at fair value	0.4
Fair value measurement on recurring basis \| Total \| Interest Rate Swap [Member]
Financial assets and liabilities accounted for at fair value on a recurring basis
Derivative Asset, Current	0.8
Derivative liabilities, current	2.3
Non-current derivative liabilities at fair value	$ 4.3	$ 14.9

Sum of the carrying amounts as of the balance sheet date of all assets that are expected to be realized in cash, sold, or consumed within one year (or the normal operating cycle, if longer). Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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