GOODWILL AND INTANGIBLE ASSETS - SUMMARY OF ACQUIRED AMORTIZABLE INTANGIBLE ASSETS (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired amount	$ 49.3
Weighted average amortization period (in years)	13.4
Customer relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired amount	41.6
Weighted average amortization period (in years)	13.9
Patents, licenses and technology [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired amount	0
Weighted average amortization period (in years)	0.0
Non-compete agreements [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired amount	1.7
Weighted average amortization period (in years)	5.0
Trade names [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired amount	$ 6.0
Weighted average amortization period (in years)	9.8