Receivables (Narrative) (Details) - Receivables Sold [Member] - IPL [Member] - USD ($) $ in Millions	Dec. 31, 2023	Oct. 31, 2023	Sep. 30, 2023
Receivables [Line Items]
Available capacity			$ 109
Subsequent Event [Member]
Receivables [Line Items]
Available capacity	$ 110	$ 5
Financial Asset, Past Due [Member]
Receivables [Line Items]
Outstanding receivables past due			$ 18