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Cover Page - USD ($)
 12 Months Ended
Dec. 31, 2023
Feb. 26, 2024
Jun. 30, 2023
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2023    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 1-6961    
Entity Registrant Name TEGNA INC.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 16-0442930    
Entity Address, Address Line One 8350 Broad Street, Suite 2000    
Entity Address, City or Town Tysons    
Entity Address, State or Province VA    
Entity Address, Postal Zip Code 22102-5151    
City Area Code (703)    
Local Phone Number 873-6600    
Title of 12(b) Security Common Stock, par value $1.00 per share    
Trading Symbol TGNA    
Security Exchange Name NYSE    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Document Financial Statement Error Correction [Flag] false    
Entity Shell Company false    
Entity Public Float     $ 3,228,576,194
Entity Common Stock, Shares Outstanding   176,106,473  
Documents Incorporated by Reference
Information pertaining to Part III of this Form 10-K is incorporated by reference to our 2024 definitive proxy statement. The 2024 definitive proxy statement will be filed with the U.S. Securities and Exchange Commission within 120 days of our fiscal year ended December 31, 2023.
    
Amendment Flag false    
Document Fiscal Year Focus 2023    
Document Fiscal Period Focus FY    
Entity Central Index Key 0000039899