Annual report pursuant to Section 13 and 15(d)

Broadcast Licenses - Fair Value Measurement Inputs and Valuation Techniques for Broadcast Licenses (Detail)

v3.22.0.1
Broadcast Licenses - Fair Value Measurement Inputs and Valuation Techniques for Broadcast Licenses (Detail) - Broadcast Licenses [Member] - Accounting
Dec. 31, 2021
Dec. 31, 2020
Measurement Input, Risk-adjusted Discount Rate [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Intangible asset measurement input percentage 8.5 8.5
Minimum [Member] | Measurement Input, Operating Profit Margin [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Intangible asset measurement input percentage 3.9 4.2
Minimum [Member] | Measurement Input, Long-term Revenue Growth Rate [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Intangible asset measurement input percentage 0.4 0.4
Maximum [Member] | Measurement Input, Operating Profit Margin [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Intangible asset measurement input percentage 30.9 31.0
Maximum [Member] | Measurement Input, Long-term Revenue Growth Rate [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Intangible asset measurement input percentage 0.7 0.9