Fair Value of Financial Instruments (Details) (USD $) In Millions	Jun. 30, 2011	Dec. 31, 2010
Financial assets and liabilities accounted for at fair value on a recurring basis
Current derivative assets at fair value	$ 5.4	$ 3.4
Marketable securities	2.7	2.7
Total current assets	1,436.4	1,160.6
Derivative liabilities, current	3.1	0.9
Total current liabilities	1,154.7	1,025.5
Total non-current liabilities	2,509.1	2,505.3
Fair value measurement on recurring basis | Level 1
Financial assets and liabilities accounted for at fair value on a recurring basis
Marketable securities	2.7	2.7
Total current assets	7.4	5.0
Total current liabilities	2.7	0.6
Fair value measurement on recurring basis | Level 1 | Foreign exchange contracts
Financial assets and liabilities accounted for at fair value on a recurring basis
Current derivative assets at fair value	4.7	2.3
Derivative liabilities, current	2.7	0.6
Fair value measurement on recurring basis | Level 2
Financial assets and liabilities accounted for at fair value on a recurring basis
Total current assets	0.7	1.1
Total current liabilities	0.4	0.3
Total non-current liabilities	24.4	38.4
Fair value measurement on recurring basis | Level 2 | Commodity contracts
Financial assets and liabilities accounted for at fair value on a recurring basis
Current derivative assets at fair value	0.7	1.1
Derivative liabilities, current	0.4	0.3
Fair value measurement on recurring basis | Level 2 | Interest rate swap contracts
Financial assets and liabilities accounted for at fair value on a recurring basis
Non-current derivative liabilities at fair value	24.4	38.4
Fair value measurement on recurring basis | Total
Financial assets and liabilities accounted for at fair value on a recurring basis
Marketable securities	2.7	2.7
Total current assets	8.1	6.1
Total current liabilities	3.1	0.9
Total non-current liabilities	24.4	38.4
Fair value measurement on recurring basis | Total | Foreign exchange contracts
Financial assets and liabilities accounted for at fair value on a recurring basis
Current derivative assets at fair value	4.7	2.3
Derivative liabilities, current	2.7	0.6
Fair value measurement on recurring basis | Total | Commodity contracts
Financial assets and liabilities accounted for at fair value on a recurring basis
Current derivative assets at fair value	0.7	1.1
Derivative liabilities, current	0.4	0.3
Fair value measurement on recurring basis | Total | Interest rate swap contracts
Financial assets and liabilities accounted for at fair value on a recurring basis
Non-current derivative liabilities at fair value	24.4	38.4
Senior Notes 7.125% due 2013
Financial assets and liabilities accounted for at fair value on a recurring basis
Debt instruments at fair value	151.7	152.4
Senior Notes 9.5 % due 2018
Financial assets and liabilities accounted for at fair value on a recurring basis
Debt instruments at fair value	438.8	438.8
Senior Notes 8.5 % due 2020
Financial assets and liabilities accounted for at fair value on a recurring basis
Debt instruments at fair value	642.0	645.0
Term loan A
Financial assets and liabilities accounted for at fair value on a recurring basis
Debt instruments at fair value	349.4	461.2
Term loan B
Financial assets and liabilities accounted for at fair value on a recurring basis
Debt instruments at fair value	$ 401.1	$ 342.0