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CONSOLIDATED BALANCE SHEETS (UNAUDITED) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2012
Sep. 30, 2012
Current assets    
Cash and cash equivalents $ 912 $ 868
Restricted cash and investments 11 11
Accounts receivable, net 1,426 1,666
Inventories, net 1,094 1,097
Regulatory assets 684 774
Other current assets 66 90
Total current assets 4,193 4,506
Property, plant, and equipment    
Completed plant 46,087 45,917
Less accumulated depreciation (22,472) (22,169)
Net completed plant 23,615 23,748
Construction in progress 5,034 4,768
Nuclear fuel 1,197 1,176
Capital leases 33 35
Total property, plant, and equipment, net 29,879 29,727
Investment funds 1,489 1,465
Regulatory and other long-term assets    
Regulatory assets 10,850 11,127
Other long-term assets 522 509
Total regulatory and other long-term assets 11,372 11,636
Total assets 46,933 47,334
Current liabilities    
Accounts payable and accrued liabilities 1,491 1,922
Environmental cleanup costs - Kingston ash spill 127 126
Accrued interest 368 376
Current portion of leaseback obligations 439 443
Current portion of energy prepayment obligations 101 102
Regulatory liabilities 194 191
Short-term debt, net 1,000 1,507
Current maturities of power bonds 2,324 2,308
Current maturities of long-term debt of variable interest entities 13 13
Total current liabilities 6,057 6,988
Other liabilities    
Post-retirement and post-employment benefit obligations 6,286 6,279
Asset retirement obligations 3,291 3,289
Other long-term liabilities 2,532 2,680
Leaseback obligations 760 760
Energy prepayment obligations 485 510
Environmental cleanup costs - Kingston ash spill 117 143
Regulatory liabilities 99 109
Total other liabilities 13,570 13,770
Long-term debt, net    
Long-term power bonds, net 21,222 20,269
Long-term debt of variable interest entities 981 981
Total long-term debt, net 22,203 21,250
Total liabilities 41,830 42,008
Proprietary capital    
Power program appropriation investment 283 288
Power program retained earnings 4,249 4,492
Total power program proprietary capital 4,532 4,780
Nonpower programs appropriation investment, net 617 620
Accumulated other comprehensive income (loss) (46) (74)
Total proprietary capital 5,103 5,326
Total liabilities and proprietary capital $ 46,933 $ 47,334