FAIR VALUE MEASUREMENTS (Details 1) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swaps	$ 7.7	$ 8.3	$ 11.7
Commodity forward contracts	1.0	7.6
Interest rate swaps	9.5	10.2	12.0
Commodity forward contracts	1.3		4.2
Earn out	21.0	42.0	33.1
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swaps	0	0	0
Commodity forward contracts	0	0.1
Interest rate swaps	0	0	0
Commodity forward contracts	0.2		0.2
Earn out	0	0	0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swaps	7.7	8.3	11.7
Commodity forward contracts	1.0	7.5
Interest rate swaps	9.5	10.2	12.0
Commodity forward contracts	1.1		4.0
Earn out	0	0	0
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swaps	0	0	0
Commodity forward contracts	0	0
Interest rate swaps	0	0	0
Commodity forward contracts	0		0
Earn out	$ 21.0	$ 42.0	$ 33.1