Cover Page - shares	6 Months Ended
	Jun. 30, 2020	Jul. 31, 2020
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2020
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		218,955,098
Entity Central Index Key	0000039899
Amendment Flag	false
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q2
Current Fiscal Year End Date	--12-31