v3.19.2
Cover Page - shares
6 Months Ended
Jun. 30, 2019
Jul. 31, 2019
Cover page.    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 30, 2019  
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  
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  
Entity Shell Company false  
Title of 12(b) Security Common Stock  
Trading Symbol TGNA  
Security Exchange Name NYSE  
Entity Common Stock Shares Outstanding   216,654,162
Entity Central Index Key 0000039899  
Amendment Flag false  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q2  
Current Fiscal Year End Date --12-31