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Net Completed Plant
12 Months Ended
Sep. 30, 2019
Property, Plant and Equipment, Net, by Type [Abstract]  
Net Completed Plant
5. Net Completed Plant

Net completed plant consisted of the following:
Net Completed Plant
At September 30
 
2019
 
2018
 
Cost
 
Accumulated Depreciation
 
 
Net
 
Cost
 
Accumulated Depreciation
 
Net
Coal-fired(1)
$
17,400

 
$
12,538

 
$
4,862

 
$
16,482

 
$
11,033

 
$
5,449

Gas and oil-fired
6,054

 
1,562

 
4,492

 
5,990

 
1,459

 
4,531

Nuclear
25,543

 
11,656

 
13,887

 
25,227

 
11,310

 
13,917

Transmission
7,932

 
3,083

 
4,849

 
7,515

 
3,038

 
4,477

Hydroelectric
3,163

 
1,051

 
2,112

 
3,087

 
1,012

 
2,075

Other electrical plant
1,920

 
1,110

 
810

 
1,881

 
1,107

 
774

Intangible software
3

 
1

 
2

 
3

 

 
3

Multipurpose dams
900

 
373

 
527

 
900

 
367

 
533

Other stewardship
29

 
10

 
19

 
29

 
9

 
20

Total
$
62,944


$
31,384


$
31,560

 
$
61,114


$
29,335


$
31,779


Note
(1) TVA recognized accelerated depreciation as a result of the decision to idle or retire certain units. See Note 6 — Plant Closures.