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Other Intangible Assets - Summary of Other Intangible Assets Useful Lives (Detail)
 12 Months Ended
Dec. 31, 2019
Customer relationships [Member]  
Disclosure of intangible assets with indefinite useful life [line items]  
Other intangible assets useful lives 11 years
Bottom of range [member] | Computer software [Member]  
Disclosure of intangible assets with indefinite useful life [line items]  
Other intangible assets useful lives 2 years
Bottom of range [member] | Patents and acquired specific technology [Member]  
Disclosure of intangible assets with indefinite useful life [line items]  
Other intangible assets useful lives 5 years
Bottom of range [member] | Others [Member]  
Disclosure of intangible assets with indefinite useful life [line items]  
Other intangible assets useful lives 5 years
Top of range [member] | Computer software [Member]  
Disclosure of intangible assets with indefinite useful life [line items]  
Other intangible assets useful lives 10 years
Top of range [member] | Patents and acquired specific technology [Member]  
Disclosure of intangible assets with indefinite useful life [line items]  
Other intangible assets useful lives 17 years
Top of range [member] | Others [Member]  
Disclosure of intangible assets with indefinite useful life [line items]  
Other intangible assets useful lives 32 years