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CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($)
$ in Millions
Dec. 31, 2017
Sep. 30, 2017
Current assets    
Cash and cash equivalents $ 300 $ 300
Restricted cash 13 0
Accounts receivable, net 1,500 1,569
Inventories, net 1,047 1,065
Regulatory assets 455 447
Other current assets 95 65
Total current assets 3,410 3,446
Property, plant, and equipment    
Completed plant 59,631 58,947
Less accumulated depreciation (28,587) (28,404)
Net completed plant 31,044 30,543
Construction in progress 2,459 2,842
Nuclear fuel 1,370 1,401
Capital leases 158 161
Total property, plant, and equipment, net 35,031 34,947
Investment funds 2,714 2,603
Regulatory and other long-term assets    
Regulatory assets 8,492 8,698
Other long-term assets 330 323
Total regulatory and other long-term assets 8,822 9,021
Total assets 49,977 50,017
Current liabilities    
Accounts payable and accrued liabilities 1,772 1,940
Accrued interest 317 346
Current portion of leaseback obligations 37 37
Current portion of energy prepayment obligations 85 100
Regulatory liabilities 159 163
Short-term debt, net 2,721 1,998
Current maturities of power bonds 2,031 1,728
Current maturities of long-term debt of variable interest entities 36 36
Current maturities of notes payable 52 53
Total current liabilities 7,210 6,401
Other liabilities    
Post-retirement and post-employment benefit obligations 5,372 5,477
Asset retirement obligations 4,206 4,176
Other long-term liabilities 2,961 3,055
Leaseback obligations 301 302
Energy prepayment obligations 0 10
Regulatory liabilities 25 25
Total other liabilities 12,865 13,045
Long-term debt, net    
Long-term power bonds, net 19,214 20,205
Long-term debt of variable interest entities, net 1,164 1,164
Long-term notes payable 68 69
Total long-term debt, net 20,446 21,438
Total liabilities 40,521 40,884
Proprietary capital    
Power program appropriation investment 258 258
Power program retained earnings 8,571 8,282
Total power program proprietary capital 8,829 8,540
Nonpower programs appropriation investment, net 570 572
Accumulated other comprehensive income (loss) 57 21
Total proprietary capital 9,456 9,133
Total liabilities and proprietary capital $ 49,977 $ 50,017