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Other Long-Term Liabilities (Tables)
3 Months Ended
Dec. 31, 2013
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, 2013
 
At September 30, 2013
Interest rate swap liabilities
$
1,060

 
$
1,199

Environmental agreements liability
165

 
190

EnergyRight® purchase obligation
149

 
149

Membership interests of VIE subject to mandatory redemption
38

 
38

Coal contract derivative liabilities
44

 
35

Commodity swap derivative liabilities
29

 
36

Currency swap liabilities
12

 
15

Other
223

 
199

Total other long-term liabilities
$
1,720

 
$
1,861