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Summary of Significant Accounting Policies - Estimated Useful Lives of Intangible Assets (Detail)
 12 Months Ended
Dec. 31, 2025
Intellectual property rights [member] | Bottom of range [member]  
Disclosure of detailed information about intangible assets [line items]  
Estimated useful lives of intangible assets 4 years
Intellectual property rights [member] | Top of range [member]  
Disclosure of detailed information about intangible assets [line items]  
Estimated useful lives of intangible assets 25 years
Development expense [member] | Bottom of range [member]  
Disclosure of detailed information about intangible assets [line items]  
Estimated useful lives of intangible assets 3 years
Development expense [member] | Top of range [member]  
Disclosure of detailed information about intangible assets [line items]  
Estimated useful lives of intangible assets 5 years
Port facilities usage rights [member] | Bottom of range [member]  
Disclosure of detailed information about intangible assets [line items]  
Estimated useful lives of intangible assets 4 years
Port facilities usage rights [member] | Top of range [member]  
Disclosure of detailed information about intangible assets [line items]  
Estimated useful lives of intangible assets 75 years
Other intangible assets [member] | Bottom of range [member]  
Disclosure of detailed information about intangible assets [line items]  
Estimated useful lives of intangible assets 2 years
Other intangible assets [member] | Top of range [member]  
Disclosure of detailed information about intangible assets [line items]  
Estimated useful lives of intangible assets 15 years