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Other Long-Term Liabilities (Tables)
3 Months Ended
Dec. 31, 2024
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, 2024At September 30, 2024
Interest rate swap liabilities$589 $792 
Environmental compliance and remediation costs210 212 
Long-term project cost accruals160 140 
Currency swap liabilities127 109 
Operating lease liabilities93 88 
EnergyRight® financing obligation
52 52 
Long-term deferred revenue 49 48 
Long-term deferred compensation37 50 
Commodity contract derivative liabilities32 64 
Advances for construction32 55 
Other98 102 
Total other long-term liabilities$1,479 $1,712