XML 188 R132.htm IDEA: XBRL DOCUMENT

Revenue Local Power Company Contracts (Details) $ in Millions	12 Months Ended
	Sep. 30, 2025 USD ($) Units	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)
Electric revenue	$ 13,483	$ 12,123	$ 11,888
Total number of LPCs \| Units	153
Percentage of total operating revenues	90.20%
Percent of wholesale Credit offered	3.10%
Pandemic Relief Credit	$ 225
Local Power Company [Member]
Electric revenue	$ 12,334
5-year contract arrangement [Member]
Number of LPCs signed LTA \| Units	5
Percentage of total operating revenues	12.40%