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Net Completed Plant Net Completed Plant (Details) - USD ($) $ in Millions	Sep. 30, 2015	Sep. 30, 2014
Completed Plant
Completed plant cost	$ 50,069	$ 47,564
Accumulated depreciation	26,318	24,589
Net completed plant	23,751	22,975
Coal-fired
Completed Plant
Completed plant cost	15,202	14,078
Accumulated depreciation	9,942	9,065
Net completed plant	5,260	5,013
Gas and oil-fired
Completed Plant
Completed plant cost	3,794	3,411
Accumulated depreciation	1,194	1,094
Net completed plant	2,600	2,317
Nuclear
Completed Plant
Completed plant cost	18,920	18,489
Accumulated depreciation	10,063	9,593
Net completed plant	8,857	8,896
Transmission
Completed Plant
Completed plant cost	6,803	6,519
Accumulated depreciation	2,823	2,683
Net completed plant	3,980	3,836
Hydroelectric
Completed Plant
Completed plant cost	2,702	2,547
Accumulated depreciation	911	889
Net completed plant	1,791	1,658
Other electrical plant
Completed Plant
Completed plant cost	1,678	1,550
Accumulated depreciation	997	885
Net completed plant	681	665
Electric Subtotal
Completed Plant
Completed plant cost	49,099	46,594
Accumulated depreciation	25,930	24,209
Net completed plant	23,169	22,385
Multipurpose dams
Completed Plant
Completed plant cost	928	928
Accumulated depreciation	371	364
Net completed plant	557	564
Other stewardship
Completed Plant
Completed plant cost	42	42
Accumulated depreciation	17	16
Net completed plant	25	26
Other Subtotal
Completed Plant
Completed plant cost	970	970
Accumulated depreciation	388	380
Net completed plant	$ 582	$ 590

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Period end amount of property, plant and equipment (PPE) related to utility distribution less the cumulative amount of depreciation, depletion and amortization related to PPE that has been recognized in the Income Statement.

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Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 360



-SubTopic 10



-Section 50



-Paragraph 1



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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef



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