XML 91 R1.htm IDEA: XBRL DOCUMENT v3.23.3
DEI Document
shares in Millions, $ in Millions
 12 Months Ended
Sep. 30, 2023
USD ($)
shares
Document Information [Line Items]  
Entity Registrant Name TENNESSEE VALLEY AUTHORITY
Entity Central Index Key 0001376986
Entity Filer Category Non-accelerated Filer
Document Type 10-K
Document Fiscal Year Focus 2023
Document Fiscal Period Focus FY
Amendment Flag false
Entity Common Stock, Shares Outstanding | shares 0
Entity Emerging Growth Company false
Entity Shell Company false
Entity Well-known Seasoned Issuer No
Entity Public Float | $ $ 0
Document Transition Report false
Entity File Number 000-52313
Entity Tax Identification Number 62-0474417
Entity Address, State or Province TN
Entity Address, City or Town Knoxville
Entity Address, Address Line One 400 W. Summit Hill Drive
Local Phone Number 632-2101
City Area Code (865)
Entity Address, Postal Zip Code 37902 (Zip Code)
Entity Interactive Data Current Yes
ICFR Auditor Attestation Flag true
Entity Incorporation, State or Country Code X1
Entity Current Reporting Status Yes
Document Annual Report true
Document Period End Date Sep. 30, 2023
Entity Small Business false
Entity Voluntary Filers No
Current Fiscal Year End Date --09-30
Document Financial Statement Error Correction [Flag] false
Auditor Name Ernst & Young LLP