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Other Long-Term Liabilities (Tables)
3 Months Ended
Dec. 31, 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
(in millions)
 At December 31, 2020At September 30, 2020
Interest rate swap liabilities$1,754 $1,927 
Operating lease liabilities159 171 
Currency swap liabilities41 123 
EnergyRight® financing obligations
75 78 
Accrued long-term service agreements49 56 
Other192 193 
Total other long-term liabilities$2,270 $2,548