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Benefit Plans (Tables)
 12 Months Ended
Dec. 31, 2019
Entity Information [Line Items]  
Schedule Of Defined Benefit Plans Disclosures
The following table presents information relating to the Pension Plans: 
 Pension benefits
as of December 31,
 20212020
 (In Thousands)
Change in benefit obligation:  
Projected benefit obligation at January 1$842,525 $782,795 
Service cost9,339 8,272 
Interest cost15,660 22,151 
Actuarial (gain)/loss(37,858)66,827 
Amendments (primarily increases in pension bands)5,575 967 
Benefits paid(63,201)(38,487)
Projected benefit obligation at December 31772,040 842,525 
Change in plan assets:  
Fair value of plan assets at January 1850,020 769,704 
Actual return on plan assets33,841 118,716 
Employer contributions24 87 
Benefits paid(63,201)(38,487)
Fair value of plan assets at December 31820,684 850,020 
Funded status$48,644 $7,495 
Amounts recognized in the statement of financial position:  
Non-current assets $49,182 $8,669 
Non-current liabilities(538)(1,174)
Net amount recognized at end of year$48,644 $7,495 
Sources of change in regulatory assets(1):
  
Prior service cost arising during period$5,575 $967 
Net gain arising during period(29,884)(14,110)
Amortization of prior service cost(2,944)(3,677)
Amortization of loss(5,529)(8,115)
Total recognized in regulatory assets$(32,782)$(24,935)
Amounts included in regulatory assets:  
Net loss$110,113 $145,526 
Prior service cost14,244 11,613 
Total amounts included in regulatory assets$124,357 $157,139 
Schedule Of Net Periodic Benefit Costs
 Pension benefits for
years ended December 31,
 202120202019
 (In Thousands)
Components of net periodic benefit (credit) / cost:   
Service cost$9,339 $8,272 $7,412 
Interest cost15,660 22,151 27,343 
Expected return on plan assets(41,815)(37,779)(29,907)
Amortization of prior service cost2,944 3,677 3,823 
Amortization of actuarial loss5,529 8,115 11,084 
Net periodic benefit (credit) / cost(8,343)4,436 19,755 
Less: amounts capitalized771 372 1,237 
Amount charged to expense$(7,572)$4,064 $18,518 
Rates relevant to each year’s expense calculations:   
Discount rate – defined benefit pension plan2.46 %3.33 %4.36 %
Discount rate – supplemental retirement plan2.31 %3.05 %4.24 %
Expected return on defined benefit pension plan assets5.05 %5.05 %4.50 %
Expected return on supplemental retirement plan assets3.60 %4.45 %4.50 %
Schedule Of Asset Allocation Guidelines
The following table summarizes the Company’s target pension plan allocation for 2021:
Asset Category:Target Allocations
Equity Securities22.5%
Debt Securities77.5%
Schedule Of Fair Value Of Pension Plan Assets
 Fair Value Measurements at
December 31, 2021
(in thousands)
  Quoted Prices in Active Markets for Identical AssetsSignificant Observable Inputs 
Asset CategoryTotal(Level 1)(Level 2)%
Cash and cash equivalents$2,353 $2,490 $— — %
Government debt securities154,051 324 153,727 19 %
Mutual fund - equities183,203 2,778 180,425 22 %
Mutual fund - debt481,077 1,637 479,440 59 %
Total$820,684 $7,229 $813,592 100 %
 Fair Value Measurements at
December 31, 2020
(in thousands)
  Quoted Prices in Active Markets for Identical AssetsSignificant Observable Inputs 
Asset CategoryTotal(Level 1)(Level 2)%
Cash and cash equivalents$2,221 $2,221 $— — %
Government debt securities118,255 131 118,124 14 %
Mutual fund - equities323,253 2,839 320,414 38 %
Mutual fund - debt406,291 1,578 404,713 48 %
Total(1)
$850,020 $6,769 $843,251 100 %
Schedule Of Expected Benefit Payments Expected benefit payments are expected to be paid out of the Pension Plans as follows:
YearPension Benefits
 (In Thousands)
2022$39,994 
202340,782 
202441,509 
202542,344 
202642,893 
2027 through 2031216,332 
Indianapolis Power And Light Company  
Entity Information [Line Items]  
Schedule Of Defined Benefit Plans Disclosures
 Pension benefits
as of December 31,
 20212020
 (In Thousands)
Change in benefit obligation:  
Projected benefit obligation at January 1$842,525 $782,795 
Service cost9,339 8,272 
Interest cost15,660 22,151 
Actuarial (gain)/loss(37,858)66,827 
Amendments (primarily increases in pension bands)5,575 967 
Benefits paid(63,201)(38,487)
Projected benefit obligation at December 31772,040 842,525 
Change in plan assets:  
Fair value of plan assets at January 1850,020 769,704 
Actual return on plan assets33,841 118,716 
Employer contributions24 87 
Benefits paid(63,201)(38,487)
Fair value of plan assets at December 31820,684 850,020 
Funded status$48,644 $7,495 
Amounts recognized in the statement of financial position:  
Non-current assets$49,182 $8,669 
Non-current liabilities(538)(1,174)
Net amount recognized at end of year$48,644 $7,495 
Sources of change in regulatory assets(1):
  
Prior service cost arising during period$5,575 $967 
Net gain arising during period(29,884)(14,110)
Amortization of prior service cost(2,944)(3,677)
Amortization of loss(5,529)(8,115)
Total recognized in regulatory assets$(32,782)$(24,935)
Amounts included in regulatory assets:  
Net loss$110,113 $145,526 
Prior service cost14,244 11,613 
Total amounts included in regulatory assets$124,357 $157,139 
Schedule Of Net Periodic Benefit Costs
 Pension benefits for
years ended December 31,
 202120202019
 (In Thousands)
Components of net periodic benefit (credit) / cost:   
Service cost$9,339 $8,272 $7,412 
Interest cost15,660 22,151 27,343 
Expected return on plan assets(41,815)(37,779)(29,907)
Amortization of prior service cost2,944 3,677 3,823 
Amortization of actuarial loss5,529 8,115 11,084 
Net periodic benefit (credit) / cost(8,343)4,436 19,755 
Less: amounts capitalized771 372 1,237 
Amount charged to expense$(7,572)$4,064 $18,518 
Rates relevant to each year’s expense calculations:   
Discount rate – defined benefit pension plan2.46 %3.33 %4.36 %
Discount rate – supplemental retirement plan2.31 %3.05 %4.24 %
Expected return on defined benefit pension plan assets5.05 %5.05 %4.50 %
Expected return on supplemental retirement plan assets3.60 %4.45 %4.50 %
Schedule Of Asset Allocation Guidelines
Asset Category:Target Allocations
Equity Securities22.5%
Debt Securities77.5%
Schedule Of Fair Value Of Pension Plan Assets
 Fair Value Measurements at
December 31, 2021
(in thousands)
  Quoted Prices in Active Markets for Identical AssetsSignificant Observable Inputs 
Asset CategoryTotal(Level 1)(Level 2)%
Cash and cash equivalents$2,353 $2,490 $— — %
Government debt securities154,051 324 153,727 19 %
Mutual fund - equities183,203 2,778 180,425 22 %
Mutual fund - debt481,077 1,637 479,440 59 %
Total$820,684 $7,229 $813,592 100 %

 Fair Value Measurements at
December 31, 2020
(in thousands)
  Quoted Prices in Active Markets for Identical AssetsSignificant Observable Inputs 
Asset CategoryTotal(Level 1)(Level 2)%
Cash and cash equivalents$2,221 $2,221 $— — %
Government debt securities118,255 131 118,124 14 %
Mutual fund - equities323,253 2,839 320,414 38 %
Mutual fund - debt406,291 1,578 404,713 48 %
Total(1)
$850,020 $6,769 $843,251 100 %
Schedule Of Expected Benefit Payments
YearPension Benefits
 (In Thousands)
2022$39,994 
202340,782 
202441,509 
202542,344 
202642,893 
2027 through 2031216,332