Receivables (Additional Attributes Of Receivables Sold Under The Agreement) (Details) - IPL [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accounts Receivable [Line Items]
Collections	$ 2,134	$ 2,025	$ 2,193
Write-offs, net of recoveries	$ 9	$ 7	$ 19