v3.26.1
Retirement and Postretirement Plans - Additional Information (Details) - USD ($)
1 Months Ended 3 Months Ended 6 Months Ended
Mar. 31, 2026
Jun. 30, 2026
Jun. 30, 2026
Jun. 30, 2025
Defined Benefit Plan Disclosure [Line Items]        
Contributions by employer   $ 0 $ 0  
Expected contributions by employer   39,000,000 39,000,000  
Benefit obligations of retirement plans   $ 343,000,000 343,000,000  
Proceeds from life insurance policies     $ 55,000,000 $ 1,000,000
Projected benefit obligation of the retirement plan, discount rate   5.25% 5.25%  
Fair value of plan assets   $ 324,000,000 $ 324,000,000  
Net noncurrent liability   19,000,000 19,000,000  
Net periodic benefit cost     0  
TEGNA Inc. [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Benefit obligations of retirement plans   60,000,000 $ 60,000,000  
Proceeds from life insurance policies $ 55,000,000      
TEGNA Inc. [Member] | Other Pension, Postretirement and Supplemental Plans [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Benefit obligation settled   $ 60,000,000