Investments - Summary of Financial Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Schedule Of Equity Method Investments [Line Items]
Net revenue	$ 1,269	$ 1,240	$ 2,553	$ 2,497
Costs and expenses	1,029	1,061	2,037	2,114
Income from operations	240	179	516	383
Net income	106	75	273	163
Net income attributable to Nexstar Media Group, Inc.	118	96	293	207
Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member]
Schedule Of Equity Method Investments [Line Items]
Net revenue	253	296	502	581
Costs and expenses	141	138	274	290
Income from operations	112	158	228	291
Net income	109	160	228	298
Net income attributable to Nexstar Media Group, Inc.	$ 34	$ 50	$ 71	$ 93