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CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($)
$ in Millions
Mar. 31, 2019
Sep. 30, 2018
Current assets    
Cash and cash equivalents $ 300 $ 299
Accounts receivable, net 1,394 1,657
Inventories, net 1,016 961
Regulatory assets 241 414
Other current assets 93 86
Total current assets 3,044 3,417
Property, plant, and equipment    
Completed plant 61,712 61,114
Less accumulated depreciation (29,803) (29,335)
Net completed plant 31,909 31,779
Construction in progress 1,921 1,999
Nuclear fuel 1,444 1,487
Capital leases 143 149
Total property, plant, and equipment, net 35,417 35,414
Investment funds   2,862
Debt Securities, Trading, and Equity Securities, FV-NI 2,835  
Regulatory and other long-term assets    
Regulatory assets 6,822 6,612
Other long-term assets 347 362
Total regulatory and other long-term assets 7,169 6,974
Total assets 48,465 48,667
Current liabilities    
Accounts payable and accrued liabilities 1,597 1,982
Accrued interest 307 305
Current portion of leaseback obligations 40 38
Current portion of energy prepayment obligations 0 10
Regulatory liabilities 195 187
Short-term debt, net 1,617 1,216
Current maturities of power bonds 1,032 1,032
Current maturities of long-term debt of variable interest entities 38 38
Current maturities of notes payable 26 46
Total current liabilities 4,852 4,854
Other liabilities    
Post-retirement and post-employment benefit obligations 4,318 4,476
Asset retirement obligations 4,875 4,665
Other long-term liabilities 2,914 2,715
Leaseback obligations 223 263
Regulatory liabilities 73 104
Total other liabilities 12,403 12,223
Long-term debt, net    
Long-term power bonds, net 19,161 20,157
Long-term debt of variable interest entities, net 1,108 1,127
Long-term notes payable 22 23
Total long-term debt, net 20,291 21,307
Total liabilities 37,546 38,384
Proprietary capital    
Power program appropriation investment 258 258
Power program retained earnings 10,069 9,404
Total power program proprietary capital 10,327 9,662
Nonpower programs appropriation investment, net 560 564
Accumulated other comprehensive income (loss) 32 57
Total proprietary capital 10,919 10,283
Total liabilities and proprietary capital $ 48,465 $ 48,667