| Cover Page - USD ($) | 12 Months Ended | | |
| Dec. 31, 2022 | Feb. 17, 2023 | Jun. 30, 2022 |
| Cover [Abstract] | | | |
| Document Type | 10-K/A | | |
| Document Annual Report | true | | |
| Document Period End Date | Dec. 31, 2022 | | |
| Current Fiscal Year End Date | --12-31 | | |
| 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, | | |
| Entity Address, Address Line Two | 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 | | |
| Title of 12(b) Security | Common Stock, par value $1.00 per share | | |
| Trading Symbol | TGNA | | |
| Security Exchange Name | NYSE | | |
| Entity Well-known Seasoned Issuer | Yes | | |
| Entity Voluntary Filers | No | | |
| 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 | | |
| ICFR Auditor Attestation Flag | true | | |
| Entity Shell Company | false | | |
| Entity Public Float | | | $ 4,639,159,645 |
| Entity Common Stock, Shares Outstanding | | 223,552,503 | |
| Amendment Flag | true | | |
| Document Fiscal Year Focus | 2022 | | |
| Document Fiscal Period Focus | FY | | |
| Entity Central Index Key | 0000039899 | | |
| Amendment Description | On February 27, 2023, TEGNA Inc. (“TEGNA,” the “Company,” “we,” “us,” or “our”) filed our Annual Report on Form 10-K for the fiscal year ended December 31, 2022 (the “Original Form 10-K”). The Original Form 10-K omitted Part III, Items 10 (Directors, Executive Officers and Corporate Governance), 11 (Executive Compensation), 12 (Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters), 13 (Certain Relationships and Related Transactions, and Director Independence) and 14 (Principal Accountant Fees and Services) in reliance on General Instruction G(3) to Form 10-K, which provides that such information may be either incorporated by reference from the registrant’s definitive proxy statement or included in an amendment to Form 10-K, in either case filed with the Securities and Exchange Commission (the “SEC”) not later than 120 days after the end of the fiscal year.This Amendment No. 1 to Form 10-K (this “Amendment”) is being filed solely to: •amend Part III, Items 10, 11, 12, 13 and 14 of the Original Form 10-K to include the information required by such Items; and •file new certifications of our principal executive officer and principal financial officer as exhibits to this Amendment under Item 15 of Part IV hereof, pursuant to Rule 12b-15 under the Securities Exchange Act of 1934, as amended (the “Exchange Act”). This Amendment does not otherwise change or update any of the disclosures set forth in the Original Form 10-K and does not otherwise reflect any events occurring after the filing of the Original Form 10-K. | | |
| Auditor Name | Auditor Name: PricewaterhouseCoopers LLP | | |
| Auditor Firm ID | 238 | | |
| Auditor Location | Auditor Location: Washington, District of Columbia | | |
