FAIR VALUE MEASUREMENTS (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				2 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Dec. 31, 2011	Feb. 28, 2011	Feb. 28, 2011 Fair Value, Measurements, Nonrecurring [Member]	Mar. 31, 2012 Fair Value Measurements Level 1 [Member]	Dec. 31, 2011 Fair Value Measurements Level 1 [Member]	Mar. 31, 2011 Fair Value Measurements Level 1 [Member]	Mar. 31, 2012 Fair Value Measurements Level 2 [Member]	Dec. 31, 2011 Fair Value Measurements Level 2 [Member]	Mar. 31, 2011 Fair Value Measurements Level 2 [Member]	Mar. 31, 2012 Fair Value Measurements Level 3 [Member]	Dec. 31, 2011 Fair Value Measurements Level 3 [Member]	Mar. 31, 2011 Fair Value Measurements Level 3 [Member]
Assets
Interest rate swaps	$ 11.7	$ 6.8	$ 13.8			$ 0	$ 0	$ 0	$ 11.7	$ 13.8	$ 6.8	$ 0	$ 0	$ 0
Commodity forward contracts		13.8						5.9			7.9			0
Liabilities
Interest rate swaps	12.0	7.0	13.7			0	0	0	12.0	13.7	7.0	0	0	0
Earn out	33.1	42.5	49.0			0	0	0	0	0	0	33.1	49.0	42.5
Commodity forward contracts	4.2		10.2			0.2	2.5		4.0	7.7		0	0
Estimated fair value of debt	564.6	605.8	552.3						403.6	391.4	481.1	161.0	160.9	124.7
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance at beginning of year	(49.0)	0
Unrealized losses included in other (expense) income	(2.6)	(0.2)
Purchases, sales and settlements	18.5	(42.3)
Balance at end of period	(33.1)	(42.5)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes payable	535.6	581.2	536.4
Earn out payment - SunBelt	15.3	0
Total earn out payment - SunBelt	18.5
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Assets measured at fair value on a nonrecurring basis					180.6
Gain on remeasurement of investment in SunBelt	0	(181.4)			(181.4)
PolyOne Corporation's interest in SunBelt (in hundredths)				50.00%
Equity interest in SunBelt prior to remeasuring					$ (0.8)