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Property, Plant and Equipment - Estimated Service Lives of Property, Plant and Equipment - Assets Subject to Operating Leases (Detail) - Assets Subject to Operating Leases [Member]
 12 Months Ended
Dec. 31, 2020
Land improvements [Member] | Bottom of Range [Member]  
Disclosure Of Property Plant And Equipment [Line Items]  
Estimated useful lives 10 years
Land improvements [Member] | Top of Range [Member]  
Disclosure Of Property Plant And Equipment [Line Items]  
Estimated useful lives 30 years
Main buildings [Member] | Bottom of Range [Member]  
Disclosure Of Property Plant And Equipment [Line Items]  
Estimated useful lives 35 years
Main buildings [Member] | Top of Range [Member]  
Disclosure Of Property Plant And Equipment [Line Items]  
Estimated useful lives 60 years
Other building facilities [Member] | Bottom of Range [Member]  
Disclosure Of Property Plant And Equipment [Line Items]  
Estimated useful lives 3 years
Other building facilities [Member] | Top of Range [Member]  
Disclosure Of Property Plant And Equipment [Line Items]  
Estimated useful lives 15 years