Income Taxes (Schedule Of Effective Income Tax Rates) (Details)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Effective Tax Rate [Line Items]
Overall income tax rate	4.00%	(19.00%)
IPL [Member]
Effective Tax Rate [Line Items]
Overall income tax rate	(14.00%)	(17.00%)
WPL [Member]
Effective Tax Rate [Line Items]
Overall income tax rate	19.00%	(29.00%)