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Commitments and Contingencies - Additional Information (Details) $ in Millions								3 Months Ended		9 Months Ended
	Apr. 17, 2026	Mar. 23, 2026 NoticeOfAppeal	Mar. 21, 2026 NoticeOfAppeal	Mar. 18, 2026 State	Mar. 02, 2026 Complaint	Sep. 19, 2019 USD ($)	Jun. 28, 2016 USD ($)	Sep. 30, 2026 USD ($)	Sep. 30, 2025 USD ($)	Sep. 30, 2026 USD ($)	Sep. 30, 2025 USD ($)	Dec. 31, 2025 USD ($)	Aug. 21, 2009
Loss Contingency, Information about Litigation Matters [Abstract]
Income tax expense (benefit)								$ 93	$ 31	$ 150	$ 111
FCC [Member]
Loss Contingency, Information about Litigation Matters [Abstract]
Percentage limit of television households reach through attributable interests in television stations										39.00%
Percentage limit of UHF stations on market pecentage of national audience										50.00%
Chicago Cubs Transactions [Member] \| Northside Entertainment Holdings LLC [Member]
Loss Contingency, Information about Litigation Matters [Abstract]
Ownership interest percentage													95.00%
Chicago Cubs Transactions [Member] \| Chicago Entertainment Ventures, LLC [Member]
Loss Contingency, Information about Litigation Matters [Abstract]
Ownership interest percentage													5.00%
Tribune [Member] \| Internal Revenue Service ("IRS") [Member]
Loss Contingency, Information about Litigation Matters [Abstract]
Increase in federal and state taxes payable										$ 17
Increase in deferred income tax liability										69
Unrecognized tax benefits								11		11		$ 11
Tribune [Member] \| Chicago Cubs Transactions [Member]
Loss Contingency, Information about Litigation Matters [Abstract]
Income tax penalties expense							$ 73
Income tax interest expense										$ 305
Estimated federal and state income taxes						$ 225
Income tax examination, estimate of possible taxes							$ 182
Tax payments						$ 154
TEGNA Inc. [Member]
Loss Contingency, Information about Litigation Matters [Abstract]
Merger agreement date										Aug. 18, 2025
Income tax expense (benefit)										$ (47)
Number of coalition of states \| State				8
Number of state cable associates filed notice of appeal \| NoticeOfAppeal			6
Number of public interest parties filed notice of appeal \| NoticeOfAppeal		5
Percentage limit of UHF stations on market pecentage of national audience	50.00%
Multi District Litigation [Member]
Loss Contingency, Information about Litigation Matters [Abstract]
Loss contingency dismissal date										Sep. 05, 2019
Loss contingency lawsuit filing date										Apr. 03, 2019
Multi District Litigation [Member] \| Second Amended Complaint [Member]
Loss Contingency, Information about Litigation Matters [Abstract]
Loss contingency dismissal date										Oct. 08, 2019
Loss contingency lawsuit filing date										Sep. 09, 2019
Financial Guarantee of Mission Debt [Member]
Loss Contingency, Information about Litigation Matters [Abstract]
Maximum commitment under senior secured credit facility								360		$ 360
Commitment under senior secured credit facility at carrying value								$ 347		$ 347
Faul Litigation [Member]
Loss Contingency, Information about Litigation Matters [Abstract]
Number of complaints filed \| Complaint					3