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Other Income (Expense), Net
3 Months Ended
Dec. 31, 2019
Other Income and Expenses [Abstract]  
Other Income (Expense), Net
uring the three months ended December 31, 2019, Other income (expense), net decreased $12 million as compared to the same period of the prior year primarily driven by $21 million of other income in 2018 related to a deposit liability received by TVA as a down payment on the sale of Bellefonte Nuclear Plant ("Bellefonte"). The purchaser, Nuclear Development, LLC, failed to fulfill the requirements of the sales contract with respect to obtaining Nuclear Regulatory Commission ("NRC") approval of the transfer of required nuclear licenses and payment of the remainder of the selling price before the November 30, 2018, closing date. Partially offsetting the income related to the Bellefonte sale was $7 million of unrealized losses in 2018 on the SERP and DCP investments. See Note 19Contingencies and Legal Proceedings Legal Proceedings for a discussion of the lawsuit filed by Nuclear Development, LLC.