XML 161 R71.htm IDEA: XBRL DOCUMENT v3.23.3
Other Long-Term Assets (Details) - USD ($)
$ in Millions
 12 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Assets, Noncurrent [Abstract]    
Financing Receivable, after Allowance for Credit Loss, Noncurrent $ 97 $ 99
Financing Receivable, after Allowance for Credit Loss, Current 7 6
Commodity contract derivative assets 12 102
Prepaid long-term service agreements, noncurrent 64 74
Prepaid capital assets 28 0
Other Assets, Miscellaneous, Noncurrent 82 70
Restricted Cash and Investments, Noncurrent 20 20
Total other long-term assets 330 394
Other Long-Term Assets    
Loans and Leases Receivable, Allowance 3 3
Transfers Accounted for as Secured Borrowings, Assets, Carrying Amount 55 62
Other Assets, Miscellaneous, Current 26 25
Accounts Receivable [Member]    
Other Long-Term Assets    
Transfers Accounted for as Secured Borrowings, Assets, Carrying Amount 12 13
Other Noncurrent Assets [Member]    
Other Long-Term Assets    
Transfers Accounted for as Secured Borrowings, Assets, Carrying Amount 47 49
EnergyRight loan reserve    
Other Long-Term Assets    
Loans and Leases Receivable, Allowance 1 1
Economic development loan collective reserve    
Other Long-Term Assets    
Loans and Leases Receivable, Allowance 1 1
Economic development loan specific loan reserve    
Other Long-Term Assets    
Loans and Leases Receivable, Allowance $ 1 $ 1
Energy Right    
Other Long-Term Assets    
Number of days in default 180 days  
Minimum | Energy Right    
Other Long-Term Assets    
EnergyRight loan terms 5 years  
Maximum | Energy Right    
Other Long-Term Assets    
EnergyRight loan terms 10 years