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Other Long-Term Liabilities (Tables)
 3 Months Ended
Dec. 31, 2016
Other Liabilities, Noncurrent [Abstract]  
Other Long-Term Liabilities
The table below summarizes the types and amounts of Other long-term liabilities:
Other Long-Term Liabilities
 
At December 31, 2016
 
At September 30, 2016
Interest rate swap liabilities
$
1,497

 
$
1,938

Capital lease obligations
176

 
177

EnergyRight® financing obligation
129

 
130

Environmental agreements liability
15

 
18

Currency swap liabilities
170

 
162

Membership interests of VIE subject to mandatory redemption
33

 
33

Commodity contract derivative liabilities
32

 
49

Regulatory liabilities
6

 
3

Commodity swap derivative liabilities
—

 
2

Other
366

 
264

Total other long-term liabilities
$
2,424

 
$
2,776