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Estimated Useful Lives of Property and Equipment (Detail)
12 Months Ended
Dec. 31, 2020
Equipment | Minimum  
Property, Plant and Equipment [Line Items]  
Property, Plant and Equipment, Useful Life 1 year 3 months
Equipment | Maximum  
Property, Plant and Equipment [Line Items]  
Property, Plant and Equipment, Useful Life 15 years
Buildings | Minimum  
Property, Plant and Equipment [Line Items]  
Property, Plant and Equipment, Useful Life 15 years
Buildings | Maximum  
Property, Plant and Equipment [Line Items]  
Property, Plant and Equipment, Useful Life 20 years
Other | Minimum  
Property, Plant and Equipment [Line Items]  
Property, Plant and Equipment, Useful Life 3 years
Other | Maximum  
Property, Plant and Equipment [Line Items]  
Property, Plant and Equipment, Useful Life 12 years