Receivables (Additional Attributes Of Receivables Sold Under The Agreement) (Details) - IPL [Member] - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Receivables [Line Items]
Collections	$ 607	$ 561	$ 1,589	$ 1,555
Write-offs, net of recoveries	$ 4	$ 1	$ 7	$ 4