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Receivables (Receivables Sold Under The Agreement) (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Receivables [Line Items] |  |
Fair value of deferred proceeds | $ 216 | $ 185
IPL [Member] |  |
Receivables [Line Items] |  |
Fair value of deferred proceeds | 216 | 185
Receivables Sold [Member] | IPL [Member] |  |
Receivables [Line Items] |  |
Customer accounts receivable | 130 | 145
Unbilled utility revenues | 98 | 132
Other receivables | 1 | 0
Receivables sold to third party | 229 | 277
Less: cash proceeds | 1 | 80
Deferred proceeds | 228 | 197
Less: allowance for expected credit losses | 12 | 12
Fair value of deferred proceeds | 216 | 185
Outstanding receivables past due | $ 22 | $ 26

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