XML 165 R109.htm IDEA: XBRL DOCUMENT v3.25.3
Benefit Plans Amounts Recognized on TVA's Consolidated Balance Sheets (Details) - USD ($)
$ in Millions
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2023
Defined Benefit Plan Disclosure      
Regulatory assets $ (8,047) $ (9,408)  
Non-current regulatory liabilities (141) (83)  
Accounts payable and accrued liabilities (3,299) (2,910)  
Pension and post-retirement benefit obligations (2,183) (2,887)  
Postemployment benefits liability, noncurrent 233 258  
Pension Benefits      
Defined Benefit Plan Disclosure      
Regulatory assets (1,531) (1,979)  
Accounts payable and accrued liabilities (9) (6)  
Pension and post-retirement benefit obligations [1] (1,698) (2,323)  
Other Post-retirement Benefits      
Defined Benefit Plan Disclosure      
Regulatory assets (131) (81)  
Non-current regulatory liabilities (131)    
Accounts payable and accrued liabilities (17) (20)  
Pension and post-retirement benefit obligations [1] (274) (333)  
Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent      
Defined Benefit Plan Disclosure      
Postemployment benefits liability, noncurrent 208 230 $ 266
Restoration Plan      
Defined Benefit Plan Disclosure      
Postemployment benefits liability, noncurrent $ 3 $ 1  
[1] The table above excludes $208 million of post-employment benefit costs and $3 million of RP costs at September 30, 2025, and $230 million of post-employment benefit costs and $1 million of RP costs at September 30, 2024 that are recorded in Post-retirement and post-employment benefit obligations on the Consolidated Balance Sheets.