Income Taxes (Narrative) (Details)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax [Line Items]
Overall income tax rate	(12.00%)	(10.00%)	11.00%
IPL [Member]
Income Tax [Line Items]
Overall income tax rate	(11.00%)	(16.00%)	8.00%
WPL [Member]
Income Tax [Line Items]
Overall income tax rate	(24.00%)	(8.00%)	17.00%
State [Member]
Income Tax [Line Items]
Overall income tax rate	9.80%	12.00%
State [Member] | IPL [Member]
Income Tax [Line Items]
Overall income tax rate	9.80%	12.00%
State [Member] | WPL [Member]
Income Tax [Line Items]
Overall income tax rate	9.80%	12.00%