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v3.20.1

Other Long-Term Assets (Details) - USD ($) $ in Millions | 6 Months Ended |
--- | --- | ---
Mar. 31, 2020 | Sep. 30, 2019
Other Long-Term Assets |  |
EnergyRight® receivables | $ 94 | $ 100
Prepaid Expense, Noncurrent | 33 | 22
Restricted Cash and Cash Equivalents | 23 | 23
Total other long-term assets | 332 | 325
Prepaid Expense, Current | 1 | 5
Accounts Receivable [Member] |  |
Other Long-Term Assets |  |
EnergyRight® receivables | 19 | 20
Other long-term assets |  |
Other Long-Term Assets |  |
Loans and other long-term receivables, net | 126 | 125
EnergyRight® receivables | 76 | 81
Prepaid capacity payments | 15 | 19
Other | $ 59 | 55
Restricted Cash and Cash Equivalents, Noncurrent |  | $ 23
Energy Right |  |
Other Long-Term Assets |  |
Number of days in default | 180 days |
Energy Right | Minimum |  |
Other Long-Term Assets |  |
Debt Instrument, Term | 5 years |
Energy Right | Maximum |  |
Other Long-Term Assets |  |
Debt Instrument, Term | 10 years |

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