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Fair Value Measurements - Schedule of Estimated Fair Values and Carrying Amounts of Long-term Debt Not Measured at Fair Value on a Recurring Basis (Details) - Fair Value, Nonrecurring [Member] - USD ($)
$ in Millions

Jun. 30, 2025

Dec. 31, 2024

Nexstar [Member] | Secured Debt [Member] | Revolving loans due June 2030 [Member] | Level 3 [Member] | Carrying Amount [Member]

Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]

Carrying Amount and Fair Value of Long-term Debt

$ 144

Nexstar [Member] | Secured Debt [Member] | Revolving loans due June 2030 [Member] | Level 3 [Member] | Fair Value [Member]

Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]

Carrying Amount and Fair Value of Long-term Debt

^[1]

143

Nexstar [Member] | Secured Debt [Member] | Term Loan A, due June 2030 [Member] | Level 2 [Member] | Carrying Amount [Member]

Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]

Carrying Amount and Fair Value of Long-term Debt

1,899

Nexstar [Member] | Secured Debt [Member] | Term Loan A, due June 2030 [Member] | Level 2 [Member] | Fair Value [Member]

Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]

Carrying Amount and Fair Value of Long-term Debt

^[2]

1,895

Nexstar [Member] | Secured Debt [Member] | Term Loan A, due June 2027 [Member] | Level 3 [Member] | Carrying Amount [Member]

Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]

Carrying Amount and Fair Value of Long-term Debt

$ 2,117

Nexstar [Member] | Secured Debt [Member] | Term Loan A, due June 2027 [Member] | Level 3 [Member] | Fair Value [Member]

Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]

Carrying Amount and Fair Value of Long-term Debt

^[3]

2,093

Nexstar [Member] | Secured Debt [Member] | Term Loan B, due June 2032 [Member] | Level 2 [Member] | Carrying Amount [Member]

Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]

Carrying Amount and Fair Value of Long-term Debt

1,279

Nexstar [Member] | Secured Debt [Member] | Term Loan B, due June 2032 [Member] | Level 2 [Member] | Fair Value [Member]

Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]

Carrying Amount and Fair Value of Long-term Debt

^[2]

1,297

Nexstar [Member] | Secured Debt [Member] | Term Loan B, due September 2026 [Member] | Level 3 [Member] | Carrying Amount [Member]

Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]

Carrying Amount and Fair Value of Long-term Debt

1,344

Nexstar [Member] | Secured Debt [Member] | Term Loan B, due September 2026 [Member] | Level 3 [Member] | Fair Value [Member]

Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]

Carrying Amount and Fair Value of Long-term Debt

^[3]

1,362

Nexstar [Member] | Senior Subordinated Notes [Member] | 5.625% Notes, due July 2027 [Member] | Level 2 [Member] | Carrying Amount [Member]

Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]

Carrying Amount and Fair Value of Long-term Debt

1,716

1,716

Nexstar [Member] | Senior Subordinated Notes [Member] | 5.625% Notes, due July 2027 [Member] | Level 2 [Member] | Fair Value [Member]

Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]

Carrying Amount and Fair Value of Long-term Debt

^[2]

1,707

1,667

Nexstar [Member] | Senior Subordinated Notes [Member] | 4.75% Notes, due November 2028 [Member] | Level 2 [Member] | Carrying Amount [Member]

Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]

Carrying Amount and Fair Value of Long-term Debt

996

995

Nexstar [Member] | Senior Subordinated Notes [Member] | 4.75% Notes, due November 2028 [Member] | Level 2 [Member] | Fair Value [Member]

Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]

Carrying Amount and Fair Value of Long-term Debt

^[2]

968

930

Mission [Member] | Secured Debt [Member] | Revolving loans due June 2030 [Member] | Level 3 [Member] | Carrying Amount [Member]

Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]

Carrying Amount and Fair Value of Long-term Debt

62

Mission [Member] | Secured Debt [Member] | Revolving loans due June 2030 [Member] | Level 3 [Member] | Fair Value [Member]

Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]

Carrying Amount and Fair Value of Long-term Debt

^[1]

61

Mission [Member] | Secured Debt [Member] | Revolving loans, due June 2027 [Member] | Level 3 [Member] | Carrying Amount [Member]

Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]

Carrying Amount and Fair Value of Long-term Debt

62

Mission [Member] | Secured Debt [Member] | Revolving loans, due June 2027 [Member] | Level 3 [Member] | Fair Value [Member]

Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]

Carrying Amount and Fair Value of Long-term Debt

^[3]

61

Mission [Member] | Secured Debt [Member] | Term Loan B, due June 2028 [Member] | Level 2 [Member] | Carrying Amount [Member]

Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]

Carrying Amount and Fair Value of Long-term Debt

287

Mission [Member] | Secured Debt [Member] | Term Loan B, due June 2028 [Member] | Level 2 [Member] | Fair Value [Member]

Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]

Carrying Amount and Fair Value of Long-term Debt

^[2]

$ 287

Mission [Member] | Secured Debt [Member] | Term Loan B, due June 2028 [Member] | Level 3 [Member] | Carrying Amount [Member]

Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]

Carrying Amount and Fair Value of Long-term Debt

289

Mission [Member] | Secured Debt [Member] | Term Loan B, due June 2028 [Member] | Level 3 [Member] | Fair Value [Member]

Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]

Carrying Amount and Fair Value of Long-term Debt

^[3]

$ 290

[1]	The fair value is based on the bid price provided by a third-party investment banking firm and is classified as Level 3 in the fair value hierarchy as the debt is not traded (unobservable in the market).
[2]	The fair value is based on the bid price provided by a third-party investment banking firm and is classified as Level 2 in the fair value hierarchy as the bid price is quoted in a major market news service and the investment banking firm stands ready to trade (observable in the market).
[3]	The fair value was estimated based on available borrowing rates for bank loans with similar terms and average maturities. The fair value measurement was considered Level 3, as significant inputs to the fair value calculation are unobservable in the market.

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