XML 70 R28.htm IDEA: XBRL DOCUMENT v2.3.0.15
Benefit Plans (Tables)
9 Months Ended
Sep. 30, 2011
Defined Benefit Pension And Other Postretirement Benefits Plans

Alliant Energy

    Defined Benefit Pension Plans     Other Postretirement Benefits Plans (a)  
     Three Months     Nine Months     Three Months     Nine Months  
     2011     2010     2011     2010     2011     2010     2011     2010  

Service cost

    $ 2.9      $ 3.0      $ 8.6      $ 9.0      $ 1.6      $ 2.2      $ 5.4      $ 7.0   

Interest cost

      13.0        13.1        39.0        39.3        2.8        3.5        9.5        11.4   

Expected return on plan assets

      (15.9 )      (15.6 )      (47.8 )      (46.6 )      (2.0 )      (1.9 )      (5.9 )      (5.8 ) 

Amortization of:

                 

Transition obligation

      —          —          —          —          —          —          —          0.1   

Prior service cost (credit)

      0.2        0.2        0.6        0.6        (3.4 )      (1.2 )      (6.6 )      (1.3 ) 

Actuarial loss

      5.2        5.9        15.7        17.9        1.2        2.2        4.0        5.3   

Additional benefit costs (b)

      1.3        —          10.2        —          —          —          —          —     

Settlement losses (c)

      1.1        1.4        1.1        1.4        —          —          —          —     
  

 

 

    

 

 

    

 

 

    

 

 

    

 

 

    

 

 

    

 

 

    

 

 

  
   $ 7.8      $ 8.0      $ 27.4      $ 21.6      $ 0.2      $ 4.8      $ 6.4      $ 16.7   
  

 

 

    

 

 

    

 

 

    

 

 

    

 

 

    

 

 

    

 

 

    

 

 

  

 

      Qualified Defined Benefit Pension Plans     Other Postretirement Benefits Plans (a)  
     Three Months     Nine Months     Three Months     Nine Months  

IPL

    2011     2010     2011     2010     2011     2010     2011     2010  

Service cost

    $ 1.5      $ 1.5      $ 4.6      $ 4.6      $ 0.6      $ 0.8      $ 2.0      $ 2.6   

Interest cost

      4.2        4.2        12.5        12.4        1.3        1.6        4.3        5.2   

Expected return on plan assets

      (5.0 )      (4.9 )      (15.0 )      (14.6 )      (1.4 )      (1.3 )      (4.0 )      (4.0 ) 

Amortization of:

                 

Transition obligation

      —          —          —          —          —          —          —          0.1   

Prior service cost (credit)

      0.2        0.2        0.4        0.5        (1.8 )      (0.5 )      (3.3 )      (0.6 ) 

Actuarial loss

      1.4        1.8        4.3        5.4        0.7        1.2        2.2        2.8   
  

 

 

    

 

 

    

 

 

    

 

 

    

 

 

    

 

 

    

 

 

    

 

 

  
   $ 2.3      $ 2.8      $ 6.8      $ 8.3      ($ 0.6 )    $ 1.8      $ 1.2      $ 6.1   
  

 

 

    

 

 

    

 

 

    

 

 

    

 

 

    

 

 

    

 

 

    

 

 

  

 

      Qualified Defined Benefit Pension Plan     Other Postretirement Benefits Plans (a)  
     Three Months     Nine Months     Three Months     Nine Months  

WPL

    2011     2010     2011     2010     2011     2010     2011     2010  

Service cost

    $ 1.1      $ 1.2      $ 3.4      $ 3.6      $ 0.7      $ 0.9      $ 2.2      $ 2.7   

Interest cost

      4.1        3.9        12.1        11.8        1.1        1.3        3.7        4.2   

Expected return on plan assets

      (5.0 )      (4.8 )      (15.0 )      (14.3 )      (0.3 )      (0.4 )      (1.0 )      (1.0 ) 

Amortization of:

                 

Prior service cost (credit)

      0.1        0.2        0.4        0.4        (1.1 )      (0.2 )      (2.2 )      (0.2 ) 

Actuarial loss

      1.8        2.2        5.3        6.4        0.5        0.7        1.6        1.7   
  

 

 

    

 

 

    

 

 

    

 

 

    

 

 

    

 

 

    

 

 

    

 

 

  
   $ 2.1      $ 2.7      $ 6.2      $ 7.9      $ 0.9      $ 2.3      $ 4.3      $ 7.4   
  

 

 

    

 

 

    

 

 

    

 

 

    

 

 

    

 

 

    

 

 

    

 

 

  

 

(a) In May 2011, Alliant Energy, IPL and WPL amended their defined benefit postretirement health care plans resulting in a revision to the method and level of coverage provided for participants more than 65 years of age. This amendment was determined to be a significant event, which required Alliant Energy, IPL and WPL to remeasure their defined benefit postretirement health care plans in May 2011. The remeasurement resulted in a decrease in Alliant Energy's postretirement benefit obligations of $64 million ($38 million for IPL, $16 million for WPL and $10 million for Corporate Services) with the impact of the remeasurement on net periodic benefit costs being recognized prospectively from the remeasurement date. The impact of the remeasurement decreased Alliant Energy's, IPL's and WPL's net periodic benefit costs by $4.3 million, $2.7 million and $1.4 million during the three months ended Sep. 30, 2011, respectively, and $7.1 million, $4.5 million, and $2.4 million during the nine months ended Sep. 30, 2011, respectively. The discount rate used for the remeasurement was 5.20%. All other assumptions used for the remeasurement were consistent with the measurement assumptions used at Dec. 31, 2010.
(b) Alliant Energy reached an agreement with the IRS, which resulted in a favorable determination letter for the Alliant Energy Cash Balance Pension Plan (Plan) during the first quarter of 2011. The agreement with the IRS required Alliant Energy to amend the Plan, which was completed in the second quarter of 2011 resulting in aggregate additional benefits of $10.2 million to be paid to certain former participants in the Plan in the second half of 2011. Alliant Energy recognized $1.3 million and $10.2 million of additional benefits costs during the three and nine months ended Sep. 30, 2011, respectively, related to these benefits. Refer to Note 11(c) for additional information regarding the Plan.
(c) For both the three and nine months ended Sep. 30, 2011 and 2010, settlement losses of $1.1 million and $1.4 million, respectively, related to payments made to retired executives.
Employees Participate In Defined Contribution Retirement Plans
     Alliant Energy      IPL (a)      WPL (a)  
     Three Months      Nine Months      Three Months      Nine Months      Three Months      Nine Months  
     2011      2010      2011      2010      2011      2010      2011      2010      2011      2010      2011      2010  

401(k) costs

    $ 4.5       $ 4.4       $ 14.5       $ 13.9       $ 2.2       $ 2.1       $ 7.1       $ 6.6       $ 2.0       $ 2.2       $ 6.6       $ 6.8   

 

(a) IPL's and WPL's amounts include allocated costs associated with Corporate Services employees.
Recognized Compensation Expense And Income Tax Benefits
     Alliant Energy      IPL      WPL  
     Three Months      Nine Months      Three Months      Nine Months      Three Months      Nine Months  
     2011      2010      2011      2010      2011      2010      2011      2010      2011      2010      2011      2010  

Compensation expense

      $0.1       $ 2.6         $4.9       $ 6.2         $0.1       $ 1.4         $2.7       $ 3.3         $0.1       $ 1.1         $2.0       $ 2.5   

Income tax benefits

      0.1         1.1         2.0         2.5         0.1         0.5         1.1         1.3         —           0.4         0.8         1.0   
Schedule Of Equity Incentive Plans Activity
     Performance Shares     Performance Units  
     2011
Grant		     2010
Grant		     2009
Grant		     2011
Grant		     2010
Grant		  

Nonvested awards

      62,170        62,829        111,980        22,279        20,717   

Alliant Energy common stock closing price on Sep. 30, 2011

    $ 38.68      $ 38.68      $ 38.68       

Alliant Energy common stock average price on grant date

          $ 38.75      $ 32.56   

Estimated payout percentage based on performance criteria

      97 %      133 %      131 %      97 %      133 % 

Fair values of each nonvested award

    $ 37.52      $ 51.44      $ 50.67      $ 37.59      $ 43.30   
Disclosure Of Other Stock Option Activity
     Three Months      Nine Months  
     2011      2010      2011      2010  

Cash received from stock options exercised

    $ 0.1       $ 2.0       $ 1.7       $ 4.3   

Aggregate intrinsic value of stock options exercised

      —           0.4         0.8         0.9   

Income tax benefit from the exercise of stock options

      —           0.1         0.3         0.3   
Schedule Of Qualified Pension Benefit Costs And Other Post Retirement Benefit Costs
     Qualified Pension Benefits Costs (a)      Other Postretirement Benefits Costs (Credits)  
     Three Months      Nine Months      Three Months      Nine Months  
     2011      2010      2011      2010      2011     2010      2011      2010  

IPL

    $ 0.7       $ —         $ 6.0       $ —         $ —        $ 0.4       $ 0.4       $ 1.7   

WPL

      0.5         0.1         3.8         0.5         (0.1 )      0.3         0.2         1.1   

 

(a) For the three and nine months ended Sep. 30, 2011, additional qualified pension benefits costs resulting from the second quarter 2011 amendment to the Cash Balance Pension Plan allocated to IPL were $0.8 million and $6.3 million, respectively, and to WPL were $0.4 million and $3.4 million, respectively.
Schedule Of Allocation Of Pension Costs
     IPL      WPL  
     Three Months      Nine Months      Three Months      Nine Months  
     2011      2010      2011      2010      2011      2010      2011      2010  

Pension costs

    $ 1.3       $ 1.5       $ 2.5       $ 3.0       $ 0.8       $ 1.0       $ 1.5       $ 1.8   
Schedule Of Estimated Future And Actual Contributions
     Estimated for Calendar Year 2011     Actual Through Sep. 30, 2011  
     Alliant Energy      IPL     WPL     Alliant Energy      IPL     WPL  

Qualified defined benefit pension plans

    $ 10       $ —        $ —        $ 9       $ —        $ —     

Non-qualified defined benefit pension plans

      7         (a )      (a )      6         (a )      (a ) 

Other postretirement benefits plans

      9         3        5        7         2        4   

 

(a) Alliant Energy sponsors several non-qualified defined benefit pension plans that cover certain current and former key employees of IPL and WPL. Alliant Energy allocates pension costs to IPL and WPL for these plans.
Performance Shares [Member]
 
Schedule Of Equity Incentive Plans Activity
     2011     2010  
     Shares (a)     Shares (a)  

Nonvested shares, Jan. 1

      234,518        256,579   

Granted

      64,217        72,487   

Vested (b)

      (57,838 )      —     

Forfeited (c)

      (3,918 )      (83,786 ) 
  

 

 

    

 

 

  

Nonvested shares, Sep. 30

      236,979        245,280   
  

 

 

    

 

 

  

 

(a) Share amounts represent the target number of performance shares. Each performance share's value is based on the price of one share of Alliant Energy's common stock at the end of the performance period. The actual number of shares that will be paid out upon vesting is dependent upon actual performance and may range from zero to 200% of the target number of shares.
(b) In the first quarter of 2011, 57,838 performance shares granted in 2008 vested at 75% of the target, resulting in a payout valued at $1.6 million, which consisted of a combination of cash and common stock (1,387 shares).
(c) In the first quarter of 2010, 57,100 performance shares granted in 2007 were forfeited without payout because the specified performance criteria for such shares were not met. The remaining forfeitures during the nine months ended Sep. 30, 2011 and 2010 were primarily caused by retirements and voluntary terminations of participants.
Performance Units [Member]
 
Schedule Of Equity Incentive Plans Activity
     2011     2010  
     Units (a)     Units (a)  

Nonvested units, Jan. 1

      23,128        —     

Granted

      23,975        23,795   

Forfeited

      (4,107 )      (667 ) 
  

 

 

    

 

 

  

Nonvested units, Sep. 30

      42,996        23,128   
  

 

 

    

 

 

  

 

(a) Unit amounts represent the target number of performance units. Each performance unit's value is based on the average price of one share of Alliant Energy's common stock on the grant date of the award. The actual payout for performance units is dependent upon actual performance and may range from zero to 200% of the target number of units.
Performance Contingent Cash Awards Activity [Member]
 
Schedule Of Equity Incentive Plans Activity
     2011     2010  
     Awards     Awards  

Nonvested awards, Jan. 1

      23,428        —     

Granted

      23,975        23,795   

Forfeited

      (727 )      (367 ) 
  

 

 

    

 

 

  

Nonvested awards, Sep. 30

      46,676        23,428   
  

 

 

    

 

 

  
Time-Based Restricted Stock [Member]
 
Schedule Of Equity Incentive Plans Activity
     2011      2010  
     Shares     Weighted
Average
Fair
Value		      Shares     Weighted
Average
Fair
Value		  

Nonvested shares, Jan. 1

      70,033      $ 32.27         125,349      $ 32.47   

Granted during first quarter

      5,000        39.86         —          —     

Vested

      (38,633 )      34.60         (51,736 )      32.87   

Forfeited

      (600 )      29.41         (1,300 )      32.78   
  

 

 

       

 

 

    

Nonvested shares, Sep. 30

      35,800        30.87         72,313        32.18   
  

 

 

       

 

 

    
Performance-Contingent Restricted Stock [Member]
 
Schedule Of Equity Incentive Plans Activity
     2011      2010  
     Shares     Weighted
Average
Fair
Value		      Shares     Weighted
Average
Fair
Value		  

Nonvested shares, Jan. 1

      296,190      $ 32.32         226,007      $ 32.25   

Granted during first quarter

      64,217        38.75         72,487        32.56   

Vested

      (53,274 )      37.93         —          —     

Forfeited

      (5,395 )      38.00         (2,304 )      32.56   
  

 

 

       

 

 

    

Nonvested shares, Sep. 30

      301,738        32.60         296,190        32.32   
  

 

 

       

 

 

    
Non-Qualified Stock Options [Member]
 
Schedule Of Equity Incentive Plans Activity
     2011      2010  
     Shares     Weighted
Average
Exercise
Price		      Shares     Weighted
Average
Exercise
Price		  

Outstanding, Jan. 1

      163,680      $ 24.51         384,331      $ 27.02   

Exercised

      (62,481 )      27.10         (151,693 )      28.34   

Expired

      —          —           (29,218 )      28.59   
  

 

 

       

 

 

    

Outstanding and exercisable, Sep. 30

      101,199        22.92         203,420        25.81