CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Operating revenues
Regulated Operating Revenue	$ 13,486	$ 12,128	$ 11,899
Revenue from sales of electricity	13,672	12,314	12,054
Operating expenses
Fuel	2,376	2,169	2,549
Purchased power	2,106	1,581	1,633
Operating and maintenance	3,717	3,641	3,372
Depreciation and amortization	2,271	2,138	2,213
Tax equivalents	633	557	593
Total operating expenses	11,103	10,086	10,360
Operating income	2,569	2,228	1,694
Other income (expense), net	92	71	61
Defined Benefit Plan, Other Cost (Credit)	105	98	199
Interest expense
Interest expense	1,196	1,066	1,056
Net income (loss)	1,360	1,135	500
Other Operating Segment
Operating revenues
Unregulated Operating Revenue	$ 186	$ 186	$ 155