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CONSOLIDATED STATEMENTS OF CHANGES IN PROPRIETARY CAPITAL (UNAUDITED) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Mar. 31, 2019
Sep. 30, 2018
Mar. 31, 2018
Sep. 30, 2017
Power Program Appropriation Investment $ 258   $ 258     $ 258    
Power Program Retained Earnings 10,234   10,234     9,404    
Nonpower Programs Appropriation Investment, Net 558   558     564    
Accumulated Other Comprehensive Income (Loss) from Net Gains (Losses) on Cash Flow Hedges (2)   (2)     57    
Total Proprietary Capital 11,048 $ 10,379 11,048 $ 10,379 $ 10,919 10,283 $ 9,932 $ 9,133
Net income (loss) 165 470 829 1,220        
Total other comprehensive income (loss) (34) (22) (59) 30        
Return on power program appropriation investment (2) (1) (5) (4)        
Power Program Appropriation Investment                
Power Program Appropriation Investment 258 258 258 258 258 258 258 258
Net income (loss) 0 0 0 0        
Total other comprehensive income (loss) 0 0 0 0        
Return on power program appropriation investment 0 0 0 0        
Power Program Retained Earnings                
Power Program Retained Earnings 10,234 9,504 10,234 9,504 10,069 9,404 9,033 8,282
Net income (loss) 167 472 835 1,226        
Total other comprehensive income (loss) 0 0 0 0        
Return on power program appropriation investment (2) (1) (5) (4)        
Nonpower Programs Appropriation Investment, Net                
Nonpower Programs Appropriation Investment, Net 558 566 558 566 560 564 568 572
Net income (loss) (2) (2) (6) (6)        
Total other comprehensive income (loss) 0 0 0 0        
Return on power program appropriation investment 0 0 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 (2) 51 (2) 51 $ 32 $ 57 $ 73 $ 21
Net income (loss) 0 0 0 0        
Total other comprehensive income (loss)   (22)   30        
Return on power program appropriation investment $ 0 $ 0 $ 0 $ 0