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Other Long-Term Liabilities (Tables)
9 Months Ended
Jun. 30, 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 June 30, 2013
 
At September 30, 2012
Interest rate swap liabilities
$
1,258

 
$
1,723

Environmental agreements liability
219

 
237

EnergyRight® purchase obligation
147

 
148

Currency swap liabilities
56

 
54

Commodity swap derivative liabilities
41

 
59

Coal contract derivative liabilities
27

 
205

Other
219

 
254

Total other long-term liabilities
$
1,967

 
$
2,680