Business Combination, Affiliation Agreement Period

No definition available.

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Period Type:	duration

- Definition

Business Combination, Number of Employees Served

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	instant

- Definition

Business Combination, Number of Markets Acquired

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Business Combination, Number of Stations Acquired

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	instant

- Definition

Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain, Net of Tax

+ References

No definition available.

+ Details

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Balance Type:	credit
Period Type:	duration

- Definition

Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain on Pre-existing Agreement

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

Escrow Deposit Disbursement Related to Acquisition

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

Noncontrolling interest, ownership change

+ References

No definition available.

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Period Type:	duration

- Definition

Number of Television Stations

+ References

No definition available.

+ Details

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Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of Stations Conveyed

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Percentage of voting equity interests acquired at the acquisition date in the business combination.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=65885119&loc=d3e1392-128463

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- References

No definition available.

+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(2)-(3)
-URI http://asc.fasb.org/extlink&oid=65885119&loc=d3e1392-128463

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(2)-(3)
-URI http://asc.fasb.org/extlink&oid=65885119&loc=d3e1392-128463

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Balance Type:	credit
Period Type:	duration

- Definition

This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 25
-Paragraph 23
-URI http://asc.fasb.org/extlink&oid=73531572&loc=d3e1043-128460

+ Details

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Balance Type:	debit
Period Type:	duration

- Definition

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 30
-Paragraph 7
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+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

This element represents the amount of earnings or loss of the acquiree since the acquisition date included in the consolidated income statement for the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)
-URI http://asc.fasb.org/extlink&oid=65885119&loc=d3e1392-128463

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Balance Type:	credit
Period Type:	duration

- Definition

This element represents the amount of revenue of the acquiree since the acquisition date included in the consolidated income statement for the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)
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Period Type:	duration

- Definition

In a business combination achieved in stages, this element represents the amount of gain recognized by the entity as a result of remeasuring to fair value the equity interest in the acquiree it held before the business combination.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (g)(2)
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Balance Type:	credit
Period Type:	duration

- Definition

In a business combination achieved in stages, this element represents the amount of net gain (loss) recognized by the entity as a result of remeasuring to fair value the equity interest in the acquiree it held before the business combination.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (g)(2)
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Period Type:	duration

- Definition

Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation.

+ References

No definition available.

+ Details

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Balance Type:	debit
Period Type:	instant

- Definition

This item represents disclosure of the amount of dividends or other distributions received from unconsolidated subsidiaries, certain corporate joint ventures, and certain noncontrolled corporation; these investments are accounted for under the equity method of accounting. This element excludes distributions that constitute a return of investment, which are classified as investing activities.

+ References

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-Name Accounting Standards Codification
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-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04(10))
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-Paragraph 2
-Subparagraph (SX 210.5-03(12))
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66011266&loc=d3e33918-111571

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- Definition

The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Investing Activities
-URI http://asc.fasb.org/extlink&oid=6516133

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-Paragraph 13
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3213-108585

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- Definition

The cash inflow associated with the amount received from the sale of a business segment or subsidiary or sale of an entity that is related to it but not strictly controlled during the period (for example, an unconsolidated subsidiary, affiliate, joint venture or equity method investment).

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Acquisitions, Investments and dispositions - Narrative (Detail) $ in Thousands			1 Months Ended			3 Months Ended	12 Months Ended
	Oct. 01, 2014 USD ($)	Apr. 01, 2014 USD ($)	Mar. 31, 2015	Jul. 31, 2014 USD ($) station	Jun. 30, 2014 USD ($) market station	Dec. 28, 2014 USD ($)	Dec. 31, 2015 USD ($)	Dec. 28, 2014 USD ($)	Dec. 31, 2016 station	Sep. 02, 2016 employee	Aug. 01, 2016	Mar. 01, 2016	Dec. 03, 2015 station	Feb. 28, 2015	Mar. 31, 2014
Business Acquisition [Line Items]
Number of stations \| station													3
Business Acquisition, Pro Forma Information
Number of television stations \| station									46
Number of stations conveyed \| station					2
Number of markets acquired \| market					2
Investment Classified Ventures
Business Acquisition [Line Items]
Ownership percentage in subsidiary															27.00%
Business Acquisition, Pro Forma Information
Proceeds from equity method investment, dividends or distributions		$ 154,600
Economic Modeling
Business Acquisition [Line Items]
Percentage of ownership interests in subsidiary			85.00%											74.00%
Change in ownership interest (as a percent)			11.00%
Cars.com
Business Acquisition [Line Items]
Percentage of ownership interests in subsidiary	73.00%
Payments to acquire businesses	$ 1,830,000
Affiliation agreement period	5 years
Remeasurement gain on acquisition	$ 476,700
Remeasurement gain on acquisition, net of tax	285,900
Remeasurement gain on acquisition on pre-existing ownership interest	$ 396,700
Ownership percentage in subsidiary	27.00%
Remeasurement gain on acquisition related to affiliate agreement	$ 80,000
Revenue since acquisition						$ 129,000
Operating income since acquisition						$ 33,600
Business Acquisition, Pro Forma Information
Total revenues								$ 2,987,058
Net income attributable to TEGNA Inc.								$ 754,851
Acquisition related costs							$ 9,300
London Broadcasting Company
Business Acquisition, Pro Forma Information
Number of television stations \| station				6
Purchase of television stations from London Broadcasting Company				$ 215,000
Escrow deposit disbursement related to London Broadcasting Company television stations acquisition				$ 134,900
Apartments.com \| Investment Classified Ventures
Business Acquisition, Pro Forma Information
Proceeds from divestiture of businesses and interests in affiliates		$ 585,000
Phoenix and St. Louis Stations
Business Acquisition, Pro Forma Information
Total sale price of Phoenix and St. Louis stations					$ 407,500
CareerBuilder \| Aurico Inc.
Business Acquisition [Line Items]
Percentage of ownership interests in subsidiary												100.00%
CareerBuilder \| DealerRater
Business Acquisition [Line Items]
Percentage of ownership interests in subsidiary											100.00%
CareerBuilder \| Workterra LLC
Business Acquisition [Line Items]
Percentage of ownership interests in subsidiary										75.00%
Number of employees served by cloud based solution, more than \| employee										600,000