Net Completed Plant Net Completed Plant (Tables)

12 Months Ended

Sep. 30, 2025

Property, Plant and Equipment, Net, by Type [Abstract]

Net Completed Plant

Net completed plant consisted of the following:

Net Completed Plant At September 30 (in millions)
	2025						2024
	Cost		Accumulated Depreciation		Net		Cost		Accumulated Depreciation		Net
Nuclear	$	27,091	$	14,682	$	12,409	$	26,800	$	14,149	$	12,651
Coal-fired(1)	19,029		15,760		3,269		20,177		16,635		3,542
Gas, oil-fired, and other production	7,746		2,274		5,472		7,051		2,112		4,939
Transmission	10,323		3,542		6,781		9,964		3,450		6,514
Hydroelectric	4,391		1,352		3,039		4,307		1,288		3,019
Other electrical plant	2,068		678		1,390		1,763		737		1,026
Multipurpose dams	900		419		481		900		413		487
Other stewardship	26		9		17		27		9		18
Total	$	71,574	$	38,716	$	32,858	$	70,989	$	38,793	$	32,196

Note

(1) TVA recognized accelerated depreciation as a result of the decision to idle or retire certain units and the potential retirement of the remainder of the coal-fired fleet by 2035. See Note 8 — Plant Closures.