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CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Millions
Sep. 30, 2018
Sep. 30, 2017
Current assets    
Cash and cash equivalents $ 299 $ 300
Restricted cash and cash equivalents 13 0
Accounts receivable, net 1,657 1,569
Inventories, net 961 1,065
Regulatory assets 414 447
Other current assets 86 65
Total current assets 3,430 3,446
Property, plant, and equipment    
Completed plant 61,114 58,947
Less accumulated depreciation (29,335) (28,404)
Net completed plant 31,779 30,543
Construction in progress 1,999 2,842
Nuclear fuel 1,487 1,401
Capital leases 149 161
Total property, plant, and equipment, net 35,414 34,947
Investment funds 2,862 2,603
Regulatory and other long-term assets    
Regulatory assets 6,612 8,698
Other long-term assets 349 323
Total regulatory and other long-term assets 6,961 9,021
Total assets 48,667 50,017
Current liabilities    
Accounts payable and accrued liabilities 1,982 1,940
Accrued interest 305 346
Current portion of leaseback obligations 38 37
Current portion of energy prepayment obligations 10 100
Regulatory liabilities 187 163
Short-term debt, net of discounts 1,216 1,998
Total Current maturities of power bonds issued at par 1,032 1,728
Current maturities of long-term debt of variable interest entities issued at par 38 36
Current maturities of notes payable 46 53
Total current liabilities 4,854 6,401
Other liabilities    
Post-retirement and post-employment benefit obligations 4,476 5,477
Asset retirement obligations 4,665 4,176
Other long-term liabilities 2,715 3,055
Leaseback obligations 263 302
Energy prepayment obligations 0 10
Non-current regulatory liabilities 104 25
Total other liabilities 12,223 13,045
Long-term debt, net    
Long-term power bonds, net 20,157 20,205
Long-term debt of variable interest entities, net 1,127 1,164
Long-term notes payable 23 69
Total long-term debt, net 21,307 21,438
Total liabilities 38,384 40,884
Commitments and contingencies (Note 21)
Proprietary capital    
Power program appropriation investment 258 258
Power program retained earnings 9,404 8,282
Total power program proprietary capital 9,662 8,540
Nonpower programs appropriation investment, net 564 572
Accumulated other comprehensive income (loss) 57 21
Total proprietary capital 10,283 9,133
Total liabilities and proprietary capital $ 48,667 $ 50,017