Receivables (Additional Attributes Of Receivables Sold Under The Agreement) (Details) - IPL [Member] - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Receivables [Line Items]
Collections	$ 453	$ 453	$ 982	$ 994
Write-offs, net of recoveries	$ 1	$ 1	$ 3	$ 3