Income Taxes (Schedule Of Effective Income Tax Rates) (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Effective Tax Rate [Line Items]
Overall income tax rate	0.00%	2.00%	(1.00%)	3.00%
IPL [Member]
Effective Tax Rate [Line Items]
Overall income tax rate	(17.00%)	(16.00%)	(18.00%)	(15.00%)
WPL [Member]
Effective Tax Rate [Line Items]
Overall income tax rate	16.00%	18.00%	14.00%	18.00%