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Net Completed Plant Net Completed Plant (Details) - USD ($) $ in Millions	Sep. 30, 2022	Sep. 30, 2021
Completed Plant
Completed plant cost	$ 66,442	$ 66,411
Accumulated depreciation	34,239	34,663
Net completed plant	32,203	31,748
Coal-fired
Completed Plant
Completed plant cost	18,145	19,319
Accumulated depreciation	13,649	14,357
Net completed plant	4,496	4,962
Gas and oil-fired
Completed Plant
Completed plant cost	6,112	6,076
Accumulated depreciation	1,957	1,824
Net completed plant	4,155	4,252
Nuclear
Completed Plant
Completed plant cost	26,629	26,024
Accumulated depreciation	12,928	12,632
Net completed plant	13,701	13,392
Transmission
Completed Plant
Completed plant cost	8,919	8,597
Accumulated depreciation	3,301	3,215
Net completed plant	5,618	5,382
Hydroelectric
Completed Plant
Completed plant cost	3,987	3,525
Accumulated depreciation	1,192	1,135
Net completed plant	2,795	2,390
Other electrical plant
Completed Plant
Completed plant cost	1,724	1,943
Accumulated depreciation	807	1,103
Net completed plant	917	840
Multipurpose dams
Completed Plant
Completed plant cost	900	900
Accumulated depreciation	396	388
Net completed plant	504	512
Other stewardship
Completed Plant
Completed plant cost	26	27
Accumulated depreciation	9	9
Net completed plant	$ 17	$ 18

X

- Definition

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.

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- Definition

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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