Debt - Long Term Debt (Parenthetical) (Details)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Sep. 25, 2020	Nov. 22, 2019	Jul. 03, 2019
Nexstar [Member] | Secured Debt [Member] | Term Loan A, due October 2023 [Member]
Long term Debt [Abstract]
Due date		Oct. 31, 2023
Nexstar [Member] | Secured Debt [Member] | Term Loan A, due September 2024 [Member]
Long term Debt [Abstract]
Due date		Sep. 30, 2024
Nexstar [Member] | Secured Debt [Member] | Term Loan A, due June 2027 [Member]
Long term Debt [Abstract]
Due date	Jun. 30, 2027	Jun. 30, 2027
Nexstar [Member] | Secured Debt [Member] | Term Loan B, due January 2024 [Member]
Long term Debt [Abstract]
Due date		Jan. 31, 2024
Nexstar [Member] | Secured Debt [Member] | Term Loan B, due September 2026 [Member]
Long term Debt [Abstract]
Interest rate	6.89%	2.60%
Due date	Sep. 30, 2026	Sep. 30, 2026
Nexstar [Member] | Senior Subordinated Notes [Member] | 5.625% Notes, due July 2027 [Member]
Long term Debt [Abstract]
Interest rate	5.625%	5.625%		5.625%	5.625%
Due date	Jul. 31, 2027	Jul. 31, 2027
Nexstar [Member] | Senior Subordinated Notes [Member] | 4.75% Notes, due November 2028 [Member]
Long term Debt [Abstract]
Interest rate	4.75%	4.75%	4.75%
Due date	Nov. 30, 2028	Nov. 30, 2028
Mission [Member] | Secured Debt [Member] | Term Loan B, due June 2028 [Member]
Long term Debt [Abstract]
Interest rate	6.89%	2.60%
Due date	Jun. 30, 2028	Jun. 30, 2028
Mission [Member] | Secured Debt [Member] | Revolving loans, due June 2027 [Member]
Long term Debt [Abstract]
Interest rate	5.86%
Due date	Jun. 30, 2027	Jun. 30, 2027
Mission [Member] | Secured Debt [Member] | Revolving loans, due October 2023 [Member]
Long term Debt [Abstract]
Due date		Oct. 31, 2023