v3.25.3

Basis of presentation, merger agreement and accounting policies - Narrative (Details)		9 Months Ended
	Aug. 18, 2025 USD ($) $ / shares	Sep. 30, 2025 USD ($) Segment Market RadioStation Station $ / shares	Apr. 30, 2025 USD ($)	Dec. 31, 2024 USD ($) $ / shares
Disaggregation of Revenue [Line Items]
Number of operating segments \| Segment		1
Number of reportable segments \| Segment		1
Number of television stations \| Station		64
Number of radio stations \| RadioStation		2
Number of markets in which entity operates \| Market		51
Segment Reporting, CODM, Profit (Loss) Measure, How Used, Description		Our reportable segment structure has been determined based on our management and internal reporting structure, the nature of products and services we offer, and the financial information that is evaluated regularly by our chief operating decision maker (CODM), who is our Chief Executive Officer.
Segment Reporting, CODM, Individual Title and Position or Group Name [Extensible Enumeration]		srt:ChiefExecutiveOfficerMember
Common stock, par value (in dollars per share) \| $ / shares		$ 1		$ 1
Allowance for doubtful accounts receivable		$ 4,545,000		$ 2,831,000
Gray
Disaggregation of Revenue [Line Items]
Redemption of noncontrolling interest			$ 20,800,000
Nexstar Media Group, Inc \| Merger Agreement
Disaggregation of Revenue [Line Items]
Termination fee to be paid	$ 120,000
Termination fee to be received	$ 125,000
Common stock, par value (in dollars per share) \| $ / shares	$ 1
Share converted amount, per share \| $ / shares	$ 22

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TEGNA INC 10-Q