Annual report pursuant to Section 13 and 15(d)

Goodwill - Fair Value Measurement Inputs and Valuation Techniques For Goodwill (Detail)

v3.22.0.1
Goodwill - Fair Value Measurement Inputs and Valuation Techniques For Goodwill (Detail)
Dec. 31, 2021
Dec. 31, 2020
Measurement Input Risk Adjusted Discount Rate [Member] | Digital [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Intangible asset measurement input percentage 0.095 0.095
Measurement Input Risk Adjusted Discount Rate [Member] | Publishing [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Intangible asset measurement input percentage 0.095 0.095
Measurement Input Risk Adjusted Discount Rate [Member] | Radio Clusters [Member] | Broadcast Networks Enterprise Valuations [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Intangible asset measurement input percentage 0.085 0.085
Measurement Input, Long-term Revenue Growth Rate [Member] | Digital [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Intangible asset measurement input percentage 0.005 0.010
Measurement Input, Long-term Revenue Growth Rate [Member] | Publishing [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Intangible asset measurement input percentage 0.005  
Measurement Input, Long-term Revenue Growth Rate [Member] | Radio Clusters [Member] | Broadcast Networks Enterprise Valuations [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Intangible asset measurement input percentage 0.004  
Minimum [Member] | Measurement Input Operating Profit Margin [Member] | Digital [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Intangible asset measurement input percentage 0.253 0.034
Minimum [Member] | Measurement Input Operating Profit Margin [Member] | Publishing [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Intangible asset measurement input percentage 0.024 0.015
Minimum [Member] | Measurement Input Operating Profit Margin [Member] | Radio Clusters [Member] | Broadcast Networks Enterprise Valuations [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Intangible asset measurement input percentage 0.014 0.114
Minimum [Member] | Measurement Input, Long-term Revenue Growth Rate [Member] | Publishing [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Intangible asset measurement input percentage   0.005
Minimum [Member] | Measurement Input, Long-term Revenue Growth Rate [Member] | Radio Clusters [Member] | Broadcast Networks Enterprise Valuations [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Intangible asset measurement input percentage   0.005
Maximum [Member] | Measurement Input Operating Profit Margin [Member] | Digital [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Intangible asset measurement input percentage 0.285 0.068
Maximum [Member] | Measurement Input Operating Profit Margin [Member] | Publishing [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Intangible asset measurement input percentage 0.052 0.044
Maximum [Member] | Measurement Input Operating Profit Margin [Member] | Radio Clusters [Member] | Broadcast Networks Enterprise Valuations [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Intangible asset measurement input percentage 0.150 0.415
Maximum [Member] | Measurement Input, Long-term Revenue Growth Rate [Member] | Publishing [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Intangible asset measurement input percentage   0.010
Maximum [Member] | Measurement Input, Long-term Revenue Growth Rate [Member] | Radio Clusters [Member] | Broadcast Networks Enterprise Valuations [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Intangible asset measurement input percentage   0.008