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Benefit Plans (Schedule Of Expected Benefit Payments) (Details)
$ in Thousands
Dec. 31, 2019
USD ($)
Entity Information [Line Items]  
2016 $ 42,215
2017 43,552
2018 44,606
2019 45,095
2020 45,362
2021 through 2025 (in total) 231,475
Indianapolis Power And Light Company  
Entity Information [Line Items]  
2016 42,215
2017 43,552
2018 44,606
2019 45,095
2020 45,362
2021 through 2025 (in total) $ 231,475