ALLOWANCE FOR DOUBTFUL ACCOUNTS RECEIVABLES (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Allowance for Doubtful Accounts [Roll Forward]        
Balance at beginning of year     $ 3.2 $ 4.8
Provisions charged (credited) (0.4) 0.6 0.6 0.8
Write-offs, net     (0.1) (1.7)
Balance at end of period $ 3.7 $ 3.9 $ 3.7 $ 3.9