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FAIR VALUE MEASUREMENTS Additional Information (Details) (USD $)
In Millions, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Fair Value Disclosures [Abstract]    
Fair value of long-term debt and debt maturing withing one year, excluding revolving and term loan credit agreements $ 3,377.0 $ 3,072.9
Book value of long-term debt and debt maturing within one year, excluding revolving and term loan credit agreements 3,100.8 2,619.4
Book value of revolving credit agreements and term loan credit agreements $ 474.1 $ 527.8