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POSTRETIREMENT BENEFITS (Tables)
6 Months Ended
Jun. 30, 2011
POSTRETIREMENT BENEFITS [Abstract]  
Schedule of defined benefit plan disclosures

   
Pension benefits
  
Health care and
other benefits
 
   
2011
  
2010
  
2011
  
2010
 
Three months ended June 30
            
Service cost
 $2.5  $2.5  $.6  $.5 
Interest cost
  4.1   4.0   3.0   2.9 
Expected return on plan assets
  (7.8)  (7.3)  -   - 
Recognized net actuarial loss
  2.4   2.9   1.5   1.1 
Amortization of prior service cost
  .1   .1   .1   .1 
Net benefit cost
 $1.3  $2.2  $5.2  $4.6 
                  

Six months ended June 30
            
Service cost
 $5.0  $4.9  $1.2  $1.1 
Interest cost
  8.2   8.0   6.1   5.9 
Expected return on plan assets
  (15.6)  (14.5)  -   - 
Recognized net actuarial loss
  4.8   5.9   3.0   2.1 
Amortization of prior service cost
  .2   .2   .1   .1 
Net benefit cost
 $2.6  $4.5  $10.4  $9.2