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Employee Benefits - Summary of Assumptions Used in Determining the Net Period Cost (Detail)
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Puerto Rico [member]      
Disclosure of sensitivity analysis for actuarial assumptions [line items]      
Discount rate and long-term rate return 3.23% 4.45% 3.61%
Rate of future salary increases 2.75% 2.75% 2.75%
Percentage of increase in health care costs for the coming year 3.18% 3.87% 3.57%
Brazil [member]      
Disclosure of sensitivity analysis for actuarial assumptions [line items]      
Discount rate and long-term rate return 7.03% 9.10% 10.18%
Rate of future salary increases 3.80% 4.00% 4.50%
Percentage of increase in health care costs for the coming year 10.30% 10.50% 11.00%
Year to which this level will be maintained 2029 2029 2028
Mexico [member]      
Disclosure of sensitivity analysis for actuarial assumptions [line items]      
Discount rate and long-term rate return 10.50% 11.81% 10.70%
Rate of future salary increases 3.20% 3.55% 4.50%
Europe [member]      
Disclosure of sensitivity analysis for actuarial assumptions [line items]      
Rate of increase of pensions 1.60% 1.60% 1.60%
Europe [member] | Bottom of range [member]      
Disclosure of sensitivity analysis for actuarial assumptions [line items]      
Employee turnover rate 0.00% 0.00% 0.00%
Europe [member] | Top of range [member]      
Disclosure of sensitivity analysis for actuarial assumptions [line items]      
Employee turnover rate 1.38% 1.51% 1.72%
Europe [member] | Actuarial assumption rate one [member]      
Disclosure of sensitivity analysis for actuarial assumptions [line items]      
Discount rate and long-term rate return 0.75% 1.25% 1.00%
Rate of future salary increases 3.00% 3.00% 3.00%
Europe [member] | Actuarial assumption rate two [member]      
Disclosure of sensitivity analysis for actuarial assumptions [line items]      
Discount rate and long-term rate return 1.00% 1.75% 1.50%
Rate of future salary increases 3.50% 3.50% 3.50%
Europe [member] | Actuarial assumption rate three [member]      
Disclosure of sensitivity analysis for actuarial assumptions [line items]      
Discount rate and long-term rate return 1.25% 2.00% 2.00%
Rate of future salary increases 4.40% 4.40% 4.40%