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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) $ in Thousands	9 Months Ended
	Sep. 30, 2025 USD ($)
Statement of Cash Flows [Abstract]
Payments for clean energy tax credits	$ 71,474

X

- Definition

Payments for clean energy tax credits.

+ References

No definition available.

+ Details

Name:	tgna_PaymentsForCleanEnergyTaxCredits
Namespace Prefix:	tgna_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_StatementOfCashFlowsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration