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Other Long-Term Liabilities (Tables)
9 Months Ended
Jun. 30, 2023
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 June 30, 2023
At September 30, 2022(1)
Interest rate swap liabilities$805 $851 
Operating lease liabilities92 93 
Currency swap liabilities153 228 
Commodity contract derivative liabilities78 
EnergyRight® financing obligation
55 58 
Long-term deferred compensation42 39 
Advances for construction51 53 
Long-term deferred revenue 41 39 
Other108 123 
Total other long-term liabilities$1,425 $1,485