Receivables (Receivables Sold Under The Agreement) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Accounts Receivable [Line Items]
Fair value of deferred proceeds	$ 185	$ 214
IPL [Member]
Accounts Receivable [Line Items]
Fair value of deferred proceeds	185	214
Financing Receivable [Member] | IPL [Member]
Accounts Receivable [Line Items]
Customer accounts receivable	145	125
Unbilled utility revenues	132	104
Receivables sold to third party	277	229
Less: cash proceeds	80	1
Deferred proceeds	197	228
Less: allowance for expected credit losses	12	14
Fair value of deferred proceeds	185	214
Outstanding receivables past due	$ 26	$ 22