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Other Long-Term Liabilities Other Long-Term Liabilities (Tables)
12 Months Ended
Sep. 30, 2020
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(1)
At September 30
 20202019
Interest rate swap liabilities$1,927 $1,676 
Operating lease liabilities171 — 
Currency swap liabilities123 193 
EnergyRight® financing obligation78 90 
Paradise pipeline financing obligation— 80 
Accrued long-term service agreements56 66 
Other193 203 
Total other long-term liabilities$2,548 $2,308