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CONSOLIDATED STATEMENTS OF CHANGES IN PROPRIETARY CAPITAL (UNAUDITED) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Sep. 30, 2015	Sep. 30, 2014
Appropriation-investment power program	$ 258		$ 258
Net income (loss)	(37)	$ 81
Total other comprehensive income (loss)	(3)	23
Return on power program appropriation investment	(2)	(1)
Retained Earnings Power Program	6,321		6,357
Appropriation investment nonpower programs, net	587		590
Accumulated Other Comprehensive Income (Loss) from Net Gains (Losses) on Cash Flow Hedges	(5)		(2)
Proprietary Capital	7,161	6,207	7,203	$ 6,104
Power Program Appropriation Investment
Appropriation-investment power program	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
Net income (loss)	(34)	84
Total other comprehensive income (loss)	0	0
Return on power program appropriation investment	(2)	(1)
Retained Earnings Power Program	6,321	5,323	6,357	5,240
Nonpower Programs Appropriation Investment, Net
Net income (loss)	(3)	(3)
Total other comprehensive income (loss)	0	0
Return on power program appropriation investment	0	0
Appropriation investment nonpower programs, net	587	598	590	601
Accumulated Other Comprehensive Income (Loss) from Net Gains (Losses) on Cash Flow Hedges
Net income (loss)	0	0
Total other comprehensive income (loss)	(3)	23
Return on power program appropriation investment	0	0
Accumulated Other Comprehensive Income (Loss) from Net Gains (Losses) on Cash Flow Hedges	$ (5)	$ 28	$ (2)	$ 5

X

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Appropriated funds advanced and property transferred to/from the reporting entity by the U.S. government for programs (exclusive of the power program) and program income received offset by expenses incurred in the administration of these programs.

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Balance of appropriated funds advanced and property transferred to/from the reporting entity by the U.S. government as an investment in its power program.

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Total proprietary capital.

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The cumulative amount of the reporting entity's undistributed earnings or deficit from power program activities less amounts returned to the U.S. government as a return on its appropriation investment in the power program.

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