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Other Long-Term Liabilities (Tables)
6 Months Ended
Mar. 31, 2022
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 March 31, 2022
At September 30, 2021(1)
Interest rate swap liabilities$1,273 $1,524 
Operating lease liabilities120 122 
Currency swap liabilities85 76 
EnergyRight® financing obligation
61 66 
Long-term deferred compensation33 42 
Advances for construction42 24 
Long-term deferred revenue 38 37 
Accrued long-term service agreements17 29 
Other132 121 
Total other long-term liabilities$1,801 $2,041