CONSOLIDATED BALANCE SHEETS $ in Millions	12 Months Ended
	Sep. 30, 2025 USD ($) Units	Sep. 30, 2024 USD ($)
Current assets
Cash and Cash Equivalent	$ 1,576	$ 502
Accounts receivable, net	2,119	1,801
Inventories, net	1,193	1,155
Regulatory assets	127	191
Other current assets	162	120
Total current assets	5,177	3,769
Property, Plant and Equipment, Gross	71,574	70,989
Property, plant, and equipment
Less accumulated depreciation	(38,716)	(38,793)
Net completed plant	32,858	32,196
Construction in progress	6,760	4,879
Nuclear fuel	1,185	1,261
Finance Lease, Right-of-Use-Asset, after Accumulated Amortization	663	729
Total property, plant, and equipment, net	41,466	39,065
Long-term Investments	5,573	4,968
Regulatory and other long-term assets
Regulatory assets	8,047	9,408
Operating Lease, Right-of-Use Asset	113	149
Other long-term assets	506	344
Investments and Other Noncurrent Assets	8,666	9,901
Total assets	60,882	57,703
Current liabilities
Accounts payable and accrued liabilities	3,299	2,910
Accrued interest	348	280
Asset Retirement Obligation, Current	313	283
Regulatory liabilities	228	174
Short-term debt, net of discounts	0	1,167
Total Current maturities of power bonds issued at par	1,370	1,022
Current maturities of long-term debt of variable interest entities issued at par	49	37
Total current liabilities	5,607	5,873
Other liabilities
Post-retirement and post-employment benefit obligations	2,183	2,887
Asset retirement obligations	10,101	10,523
Finance Lease, Liability, Noncurrent	640	700
Other long-term liabilities	1,606	1,712
Non-current regulatory liabilities	141	83
Noncurrent Liabilities Other than Long-Term Debt	14,671	15,905
Long-term debt, net
Long-term power bonds, net	20,461	17,867
Long-term debt of variable interest entities, net	1,632	897
Total long-term debt, net	22,093	18,764
Total liabilities	42,371	40,542
Proprietary capital
Power program appropriation investment	258	258
Power program retained earnings	17,797	16,437
Total power program proprietary capital	18,055	16,695
Nonpower programs appropriation investment, net	510	518
Accumulated other comprehensive income (loss)	(54)	(52)
Total proprietary capital	18,511	17,161
Liabilities and Equity	$ 60,882	$ 57,703
Holly Springs
Proprietary capital
Number of customers with allowance for uncollectible accounts | Units	1