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CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($)
$ in Millions
Dec. 31, 2023
Sep. 30, 2023
Current assets    
Cash and cash equivalents $ 498 $ 501
Accounts receivable, net 1,593 1,745
Inventories, net 1,182 1,108
Regulatory assets 251 178
Prepaid Expense and Other Assets, Current 152 134
Total current assets 3,676 3,666
Property, plant, and equipment    
Completed plant 67,073 68,199
Less accumulated depreciation (34,445) (35,871)
Property, Plant, and Equipment, Owned, Net 32,628 32,328
Construction in progress 3,425 3,238
Nuclear fuel 1,364 1,344
Finance lease, asset 562 572
Total property, plant, and equipment, net 37,979 37,482
Investment funds 4,472 4,123
Regulatory and other long-term assets    
Regulatory assets 5,551 5,566
Operating Lease, Right-of-Use Asset 258 177
Other long-term assets 312 330
Investments and Other Noncurrent Assets 6,121 6,073
Total assets 52,248 51,344
Current liabilities    
Accounts payable and accrued liabilities 2,451 2,618
Accrued interest 268 272
Asset Retirement Obligation, Current 275 272
Regulatory liabilities 259 222
Short-term debt, net 1,042 432
Current maturities of power bonds 1,022 1,022
Current maturities of long-term debt of variable interest entities 35 35
Total current liabilities 5,352 4,873
Other liabilities    
Post-retirement and post-employment benefit obligations 2,457 2,527
Asset retirement obligations 7,295 7,217
Finance Lease, Liability 571 576
Other long-term liabilities 1,488 1,211
Regulatory liabilities 103 107
Liabilities, Other than Long-Term Debt, Noncurrent 11,914 11,638
Long-term debt, net    
Long-term power bonds, net 17,867 17,844
Long-term debt of variable interest entities, net 933 933
Total long-term debt, net 18,800 18,777
Total liabilities 36,066 35,288
Proprietary capital    
Power program appropriation investment 258 258
Power program retained earnings 15,429 15,302
Total power program proprietary capital 15,687 15,560
Nonpower programs appropriation investment, net 523 525
Accumulated other comprehensive income (loss) (28) (29)
Total proprietary capital 16,182 16,056
Liabilities and Equity $ 52,248 $ 51,344