Income Taxes (Schedule Of Effective Income Tax Rates) (Details)	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Effective Tax Rate [Line Items]
Overall income tax rate	(1.00%)	4.00%
IPL [Member]
Effective Tax Rate [Line Items]
Overall income tax rate	(18.00%)	(14.00%)
WPL [Member]
Effective Tax Rate [Line Items]
Overall income tax rate	12.00%	19.00%