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Accounting Policies - Schedule of Range of Estimated Service Lives (Detail)
12 Months Ended
Dec. 31, 2016
Minimum [Member] | Buildings [Member]  
Property, Plant and Equipment [Line Items]  
Range of estimated service lives 15 years
Minimum [Member] | Machinery and Equipment [Member]  
Property, Plant and Equipment [Line Items]  
Range of estimated service lives 5 years
Minimum [Member] | Other [Member]  
Property, Plant and Equipment [Line Items]  
Range of estimated service lives 3 years
Maximum [Member] | Buildings [Member]  
Property, Plant and Equipment [Line Items]  
Range of estimated service lives 45 years
Maximum [Member] | Machinery and Equipment [Member]  
Property, Plant and Equipment [Line Items]  
Range of estimated service lives 40 years
Maximum [Member] | Other [Member]  
Property, Plant and Equipment [Line Items]  
Range of estimated service lives 25 years