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Goodwill and Identifiable Intangible Assets - Significant Assumptions Used to Estimate the Fair Values of Tradenames Impaired (Detail)
Dec. 31, 2020
Long-term Revenue Growth Rate [Member]  
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]  
Alternative Investment, Type [Extensible List] Tradename [Member]
Minimum [Member] | Discount Rate [Member]  
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]  
Assumptions used to estimate the fair values 0.148
Alternative Investment, Type [Extensible List] Tradename [Member]
Minimum [Member] | Royalty Rate [Member]  
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]  
Assumptions used to estimate the fair values 0.040 [1]
Alternative Investment, Type [Extensible List] Tradename [Member] [1]
Minimum [Member] | Long-term Revenue Growth Rate [Member]  
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]  
Assumptions used to estimate the fair values 0.010 [2]
Alternative Investment, Type [Extensible List] Tradename [Member] [2]
Maximum [Member] | Discount Rate [Member]  
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]  
Assumptions used to estimate the fair values 0.158
Alternative Investment, Type [Extensible List] Tradename [Member]
Maximum [Member] | Royalty Rate [Member]  
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]  
Assumptions used to estimate the fair values 0.050 [1]
Alternative Investment, Type [Extensible List] Tradename [Member] [1]
Maximum [Member] | Long-term Revenue Growth Rate [Member]  
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]  
Assumptions used to estimate the fair values 0.030 [2]
Alternative Investment, Type [Extensible List] Tradename [Member] [2]
Weighted Average [Member] | Discount Rate [Member]  
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]  
Assumptions used to estimate the fair values 0.151 [3]
Alternative Investment, Type [Extensible List] Tradename [Member] [3]
Weighted Average [Member] | Royalty Rate [Member]  
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]  
Assumptions used to estimate the fair values 0.043 [1],[3]
Alternative Investment, Type [Extensible List] Tradename [Member] [1],[3]
Weighted Average [Member] | Long-term Revenue Growth Rate [Member]  
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]  
Assumptions used to estimate the fair values 0.016 [2],[3]
Alternative Investment, Type [Extensible List] Tradename [Member] [2],[3]
[1] Represents estimated percentage of sales a market-participant would pay to license the impaired tradenames.
[2] Selected long-term revenue growth rate within 10-year projection period of the impaired tradenames.
[3] Weighted by relative fair value of the impaired tradenames.