Document and Entity Information	6 Months Ended
	Jun. 30, 2017 shares
Document and Entity Information [Abstract]
Entity Registrant Name	TEGNA INC
Entity Central Index Key	0000039899
Document Type	10-Q
Document Period End Date	Jun. 30, 2017
Amendment Flag	false
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	Q2
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock Shares Outstanding	215,115,749
Trading Symbol	TGNA