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Retirement and Other Postretirement Benefits (Tables)
9 Months Ended
Sep. 30, 2011
Qualified Pension [Member]
 
Defined Benefit Plan Disclosure [Line Items] 
Components of Qualified Net Pension Cost, including amounts capitalized
     Entergy’s qualified pension cost, including amounts capitalized, for the third quarters of 2011 and 2010, included the following components:
                 
    2011     2010  
    (In Thousands)  
Service cost — benefits earned during the period
  $ 30,490     $ 26,239  
Interest cost on projected benefit obligation
    59,248       57,802  
Expected return on assets
    (75,319 )     (64,902 )
Amortization of prior service cost
    838       1,164  
Amortization of loss
    23,244       16,475  
 
           
Net pension costs
  $ 38,501     $ 36,778  
 
           
     Entergy’s qualified pension cost, including amounts capitalized, for the nine months ended September 30, 2011 and 2010, included the following components:
                 
    2011     2010  
    (In Thousands)  
Service cost — benefits earned during the period
  $ 91,470     $ 78,717  
Interest cost on projected benefit obligation
    177,744       173,406  
Expected return on assets
    (225,957 )     (194,706 )
Amortization of prior service cost
    2,514       3,492  
Amortization of loss
    69,732       49,425  
 
           
Net pension costs
  $ 115,503     $ 110,334  
 
           
Other Postretirement [Member]
 
Defined Benefit Plan Disclosure [Line Items] 
Components of Qualified Net Pension Cost, including amounts capitalized
     Entergy’s other postretirement benefit cost, including amounts capitalized, for the third quarters of 2011 and 2010, included the following components:
                 
    2011     2010  
    (In Thousands)  
Service cost — benefits earned during the period
  $ 14,835     $ 13,078  
Interest cost on accumulated postretirement benefit obligation (APBO)
    18,631       19,020  
Expected return on assets
    (7,369 )     (6,553 )
Amortization of transition obligation
    796       932  
Amortization of prior service cost
    (3,518 )     (3,015 )
Amortization of loss
    5,298       4,317  
 
           
Net other postretirement benefit cost
  $ 28,673     $ 27,779  
 
           
     Entergy’s other postretirement benefit cost, including amounts capitalized, for the nine months ended September 30, 2011 and 2010, included the following components:
                 
    2011     2010  
    (In Thousands)  
Service cost — benefits earned during the period
  $ 44,505     $ 39,234  
Interest cost on APBO
    55,893       57,060  
Expected return on assets
    (22,107 )     (19,659 )
Amortization of transition obligation
    2,388       2,796  
Amortization of prior service cost
    (10,554 )     (9,045 )
Amortization of loss
    15,894       12,951  
 
           
Net other postretirement benefit cost
  $ 86,019     $ 83,337