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ACCUMULATED OTHER COMPREHENSIVE INCOME (Tables)
3 Months Ended
Mar. 31, 2014
Notes To Consolidated Financial Statements [Abstract]  
Schedule Of Accumulated Other Comprehensive Income Loss Table Text Block
  For the Three Months Ended March 31, 2014 For the Three Months Ended March 31, 2013
     Unrealized Pension,       Unrealized Pension,   
  Qualified  Gains/(Losses)  SERP and    Qualified  Gains/(Losses)  SERP and   
  Cash Flow on Available- PBOP   Cash Flow on Available- PBOP  
  Hedging  for-Sale Benefit   Hedging  for-Sale Benefit  
(Millions of Dollars)Instruments Securities Plans Total Instruments Securities Plans Total
AOCI as of Beginning of Period (14.4)  0.4  (32.0)  (46.0)  (16.4)  1.3  (57.8)  (72.9)
                         
OCI Before Reclassifications  -   0.2   -   0.2   -   (0.1)   -   (0.1)
Amounts Reclassified from AOCI  0.5   -   1.0   1.5   0.5   -   1.6   2.1
Net OCI  0.5   0.2   1.0   1.7   0.5   (0.1)   1.6   2.0
AOCI as of End of Period$ (13.9) $ 0.6 $ (31.0) $ (44.3) $ (15.9) $ 1.2 $ (56.2) $ (70.9)

 For the Three Months Ended March 31,
 Amounts Reclassified from AOCI Statements of Income Line Item Impacted
      
(Millions of Dollars)2014 2013  
Qualified Cash Flow Hedging Instruments$(0.8) $(0.8) Interest Expense
Tax Benefit 0.3  0.3 Income Tax Expense
Qualified Cash Flow Hedging Instruments, Net of Tax$(0.5) $(0.5)  
        
Pension, SERP and PBOP Benefit Plan Costs:       
Amortization of Actuarial Losses$(1.7) $(2.6) Operations and Maintenance (1)
Tax Benefit 0.7  1.0 Income Tax Expense
Pension, SERP and PBOP Benefit Plan Costs, Net of Tax$(1.0) $(1.6)  
        
Total Amount Reclassified from AOCI, Net of Tax$(1.5) $(2.1)