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Other Long-Term Assets (Tables)
 6 Months Ended
Mar. 31, 2018
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]  
Other Long-Term Assets
The table below summarizes the types and amounts of TVA's other long-term assets:
Other Long-Term Assets 
 
At March 31, 2018
 
At September 30, 2017
Loans and other long-term receivables, net
$
142

 
$
115

EnergyRight® receivables
95

 
100

Prepaid capacity payments
31

 
34

Commodity contract derivative assets
3

 
2

Currency swap asset, net
29

 
—

Other
70

 
72

Other long-term assets
$
370

 
$
323