Income Taxes (Schedule Of Effective Income Tax Rates) (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Effective Tax Rate [Line Items]
Overall income tax rate	2.00%	(13.00%)	3.00%	(16.00%)
IPL [Member]
Effective Tax Rate [Line Items]
Overall income tax rate	(16.00%)	(13.00%)	(15.00%)	(15.00%)
WPL [Member]
Effective Tax Rate [Line Items]
Overall income tax rate	18.00%	(23.00%)	18.00%	(27.00%)