XML 167 R153.htm IDEA: XBRL DOCUMENT v3.19.1
Commitments and Contingencies - Additional Information (Detail)
$ in Millions
 12 Months Ended
Dec. 31, 2018
USD ($)
t
Dec. 31, 2017
USD ($)
t
Disclosure of finance lease and operating lease by lessee [Line Items]    
Leased motor vehicle to secure finance lease liabilities, average discount interest rate 5.18% 5.11%
Capital commitment relating to the construction of factory building improvement and acquisition of machinery $ 0.6 $ 0.8
Corporate guarantee 36.9 35.2
Commitments in respect of repair and maintenance consulting services with related parties $ 0.2 0.1
Bottom of range [Member]    
Disclosure of finance lease and operating lease by lessee [Line Items]    
Non-cancellable operating lease arrangements terms 1 year  
Commitments to purchase raw materials $ 136.0 $ 175.0
Commitments to purchase raw materials, metric tons | t 22,450 24,005
Top of range [Member]    
Disclosure of finance lease and operating lease by lessee [Line Items]    
Non-cancellable operating lease arrangements terms 30 years  
Commitments to purchase raw materials $ 176.0 $ 277.0
Commitments to purchase raw materials, metric tons | t 28,940 37,930
Contingent liability for guarantees | Top of range [Member]    
Disclosure of finance lease and operating lease by lessee [Line Items]    
Corporate guarantee $ 24.3 $ 31.2
Charoong Thai Wire and Cable Public Company Limited [Member] | Contingent liability for guarantees    
Disclosure of finance lease and operating lease by lessee [Line Items]    
Corporate guarantee $ 2.0 $ 2.0