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Debt (Schedule Of Maturities On Long-Term Indebtedness) (Details)
$ in Thousands
Dec. 31, 2019
USD ($)
Entity Information [Line Items]  
2016 $ 560,000
2017 95,000
2018 0
2019 0
2020 445,000
Thereafter 1,578,800
Total 2,678,800
Indianapolis Power And Light Company  
Entity Information [Line Items]  
2016 90,000
2017 95,000
2018 0
2019 0
2020 40,000
Thereafter 1,578,800
Total $ 1,803,800