Fair Value of Financial Instruments (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2012 Senior Notes 7.125% due 2013	Dec. 31, 2011 Senior Notes 7.125% due 2013	Sep. 30, 2012 Senior Notes 9.50 % due 2018	Dec. 31, 2011 Senior Notes 9.50 % due 2018	Feb. 08, 2010 Senior Notes 9.50 % due 2018	Sep. 30, 2012 Senior Notes 8.50 % due 2020	Dec. 31, 2011 Senior Notes 8.50 % due 2020	Oct. 18, 2010 Senior Notes 8.50 % due 2020	Sep. 30, 2012 Term loan A	Dec. 31, 2011 Term loan A	Sep. 30, 2012 Term loan B	Dec. 31, 2011 Term loan B	Sep. 30, 2012 Fair value measurement on recurring basis Level 1	Dec. 31, 2011 Fair value measurement on recurring basis Level 1	Sep. 30, 2012 Fair value measurement on recurring basis Level 2	Dec. 31, 2011 Fair value measurement on recurring basis Level 2	Sep. 30, 2012 Fair value measurement on recurring basis Level 2 Foreign currency exchange contracts	Dec. 31, 2011 Fair value measurement on recurring basis Level 2 Foreign currency exchange contracts	Sep. 30, 2012 Fair value measurement on recurring basis Level 2 Commodity contracts	Dec. 31, 2011 Fair value measurement on recurring basis Level 2 Commodity contracts	Sep. 30, 2012 Fair value measurement on recurring basis Level 2 Interest rate swap contracts	Dec. 31, 2011 Fair value measurement on recurring basis Level 2 Interest rate swap contracts	Sep. 30, 2012 Fair value measurement on recurring basis Level 2 Interest rate cap contracts	Dec. 31, 2011 Fair value measurement on recurring basis Level 2 Interest rate cap contracts	Sep. 30, 2012 Fair value measurement on recurring basis Total	Dec. 31, 2011 Fair value measurement on recurring basis Total	Sep. 30, 2012 Fair value measurement on recurring basis Total Foreign currency exchange contracts	Dec. 31, 2011 Fair value measurement on recurring basis Total Foreign currency exchange contracts	Sep. 30, 2012 Fair value measurement on recurring basis Total Commodity contracts	Dec. 31, 2011 Fair value measurement on recurring basis Total Commodity contracts	Sep. 30, 2012 Fair value measurement on recurring basis Total Interest rate swap contracts	Dec. 31, 2011 Fair value measurement on recurring basis Total Interest rate swap contracts	Sep. 30, 2012 Fair value measurement on recurring basis Total Interest rate cap contracts	Dec. 31, 2011 Fair value measurement on recurring basis Total Interest rate cap contracts
Financial assets and liabilities accounted for at fair value on a recurring basis
Current derivative assets at fair value																			$ 1.7	$ 0.8	$ 0.1								$ 1.7	$ 0.8	$ 0.1
Marketable securities	2.7	2.7													2.6	2.7											2.6	2.7
Total current assets	1,500.5	1,236.9													2.6	2.7	1.8	0.8									4.4	3.5
Non-current derivative assets at fair value																								0.5	0.7	0.3								0.5	0.7	0.3
Total non-current assets at fair value																	0.7	0.8									0.7	0.8
Derivative liabilities, current	5.8	18.8																	1.8	6.7	1.4	2.4	2.5						1.8	6.7	1.4	2.4	2.5
Total current liabilities	1,153.4	1,103.5															5.7	9.1									5.7	9.1
Non-current derivative liabilities at fair value																								9.5										9.5
Total non-current liabilities	2,532.1	2,438.0																9.5										9.5
Interest rate, stated percentage			7.125%		9.50%		9.50%	8.50%		8.50%
Debt instruments at fair value			$ 150.8	$ 146.6	$ 449.0	$ 434.0		$ 672.8	$ 634.9		$ 304.3	$ 318.6	$ 333.9	$ 324.1