Receivables (Receivables Sold Under The Agreement) (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Receivables [Line Items]
Fair value of deferred proceeds	$ 236	$ 185
IPL [Member]
Receivables [Line Items]
Fair value of deferred proceeds	236	185
Receivables Sold [Member] | IPL [Member]
Receivables [Line Items]
Customer accounts receivable	161	145
Unbilled utility revenues	88	132
Other receivables	1	0
Receivables sold to third party	250	277
Less: cash proceeds	1	80
Deferred proceeds	249	197
Less: allowance for expected credit losses	13	12
Fair value of deferred proceeds	$ 236	$ 185