Income Taxes (Schedule Of Effective Income Tax Rates) (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Effective Tax Rate [Line Items]
Overall income tax rate	6.00%	(9.00%)	4.00%	(13.00%)
IPL [Member]
Effective Tax Rate [Line Items]
Overall income tax rate	(12.00%)	(8.00%)	(14.00%)	(11.00%)
WPL [Member]
Effective Tax Rate [Line Items]
Overall income tax rate	15.00%	(19.00%)	17.00%	(24.00%)