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Retirement and Postretirement Plans (Tables) | 9 Months Ended
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Sep. 30, 2025
Retirement Benefits [Abstract] |
Summary of Components of Net Periodic Benefit Cost (Credit) for Plans | The following tables provide the components of net periodic benefit cost (credit) for Nexstar’s pension benefit plans (in millions):
|  | Pension Benefit Plans |
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
Service cost |  | $ | - |  |  | $ | - |  |  | $ | - |  |  | $ | 1 |
Interest cost |  |  | 20 |  |  |  | 20 |  |  |  | 59 |  |  |  | 58 |
Expected return on plan assets |  |  | (26 | ) |  |  | (25 | ) |  |  | (77 | ) |  |  | (75 | )
Amortization of net gain |  |  | (1 | ) |  |  | (1 | ) |  |  | (4 | ) |  |  | (4 | )
Net periodic benefit credit |  | $ | (7 | ) |  | $ | (6 | ) |  | $ | (22 | ) |  | $ | (20 | )

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- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (q) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-5 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 715 -SubTopic 20 -Subparagraph (h) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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