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CONSOLIDATED BALANCE SHEETS (UNAUDITED) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2013
Sep. 30, 2012
Current assets    
Cash and cash equivalents $ 919 $ 868
Restricted cash and investments 0 11
Accounts receivable, net 1,361 1,666
Inventories, net 1,178 1,097
Regulatory assets 584 774
Other current assets 77 90
Total current assets 4,119 4,506
Property, plant, and equipment    
Completed plant 46,475 45,917
Less accumulated depreciation (22,632) (22,169)
Net completed plant 23,843 23,748
Construction in progress 4,893 4,768
Nuclear fuel 1,280 1,176
Capital leases 31 35
Total property, plant, and equipment, net 30,047 29,727
Investment funds 1,569 1,465
Regulatory and other long-term assets    
Regulatory assets 10,352 11,127
Other long-term assets 405 509
Total regulatory and other long-term assets 10,757 11,636
Total assets 46,492 47,334
Current liabilities    
Accounts payable and accrued liabilities 1,678 1,922
Environmental cleanup costs - Kingston ash spill 126 126
Accrued interest 398 376
Current portion of leaseback obligations 438 443
Current portion of energy prepayment obligations 100 102
Regulatory liabilities 188 191
Short-term debt, net 2,045 1,507
Current maturities of power bonds 1,242 2,308
Current maturities of long-term debt of variable interest entities 13 13
Total current liabilities 6,228 6,988
Other liabilities    
Post-retirement and post-employment benefit obligations 6,349 6,279
Asset retirement obligations 3,324 3,289
Other long-term liabilities 2,227 2,680
Leaseback obligations 712 760
Energy prepayment obligations 460 510
Environmental cleanup costs - Kingston ash spill 91 143
Regulatory liabilities 3 109
Total other liabilities 13,166 13,770
Long-term debt, net    
Long-term power bonds, net 20,959 20,269
Long-term debt of variable interest entities 975 981
Total long-term debt, net 21,934 21,250
Total liabilities 41,328 42,008
Proprietary capital    
Power program appropriation investment 278 288
Power program retained earnings 4,302 4,492
Total power program proprietary capital 4,580 4,780
Nonpower programs appropriation investment, net 616 620
Accumulated other comprehensive income (loss) (32) (74)
Total proprietary capital 5,164 5,326
Total liabilities and proprietary capital $ 46,492 $ 47,334