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CONSOLIDATED STATEMENTS OF CHANGES IN PROPRIETARY CAPITAL (UNAUDITED) - USD ($)
$ in Millions
3 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Sep. 30, 2019
Sep. 30, 2018
Power Program Appropriation Investment $ 258   $ 258  
Power Program Retained Earnings 11,015   10,823  
Nonpower Programs Appropriation Investment, Net 554   556  
Accumulated Other Comprehensive Income (Loss) from Net Gains (Losses) on Cash Flow Hedges 5   (12)  
Total Proprietary Capital 11,832 $ 10,670 11,625 $ 10,283
Net income (loss) 192 423    
Total other comprehensive income (loss) 17 (34)    
Return on power program appropriation investment (2) (2)    
Power Program Appropriation Investment        
Power Program Appropriation Investment 258 258 258 258
Net income (loss) 0 0    
Total other comprehensive income (loss) 0 0    
Return on power program appropriation investment 0 0    
Power Program Retained Earnings        
Power Program Retained Earnings 11,015 9,827 10,823 9,404
Net income (loss) 194 425    
Total other comprehensive income (loss) 0 0    
Return on power program appropriation investment (2) (2)    
Nonpower Programs Appropriation Investment, Net        
Nonpower Programs Appropriation Investment, Net 554 562 556 564
Net income (loss) (2) (2)    
Total other comprehensive income (loss) 0 0    
Return on power program appropriation investment 0 0    
Accumulated Other Comprehensive Income (Loss) from Net Gains (Losses) on Cash Flow Hedges        
Accumulated Other Comprehensive Income (Loss) from Net Gains (Losses) on Cash Flow Hedges 5 23 $ (12) $ 57
Net income (loss) 0 0    
Total other comprehensive income (loss) 17 (34)    
Return on power program appropriation investment $ 0 $ 0