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Related Parties - Summary of Balances and Transactions With Related Parties (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Jan. 01, 2017
Jan. 01, 2016
Disclosure of transactions between related parties [line items]          
Current assets $ 7,071.0 $ 7,079.6 $ 6,823.6 $ 6,823.6 $ 6,447.6
Current liabilities 3,028.6 2,803.2 3,227.9 3,227.8 3,147.4
Non-current assets 4,222.3 4,895.0 4,896.2 4,896.2 5,260.1
Non-current liabilities 4,324.6 4,993.9 4,555.5 $ 4,555.6 $ 4,741.2
Financial results (171.2) 280.0 180.3    
Operating results 35.3 341.9 213.7    
Related parties [member]          
Disclosure of transactions between related parties [line items]          
Current assets 369.4 557.7      
Current liabilities 493.9 298.6      
Non-current assets 9.4 330.8      
Non-current liabilities 163.2 603.1      
Financial results (14.6) (18.1) 4.2    
Operating results (203.2) (54.0) 2.6    
Related parties [member] | Banco do Brasil S.A. [member]          
Disclosure of transactions between related parties [line items]          
Current assets 326.2 227.2      
Current liabilities 314.3 92.9      
Non-current assets 9.4 330.8      
Non-current liabilities   319.5      
Financial results (4.2) (0.5) (2.8)    
Related parties [member] | Banco Nacional De Desenvolvimento Econmico e Social BNDES [member]          
Disclosure of transactions between related parties [line items]          
Current liabilities 71.8 88.4      
Non-current liabilities 119.7 219.0      
Financial results (8.3) (14.7) (18.6)    
Related parties [member] | Brazilian Air force [member]          
Disclosure of transactions between related parties [line items]          
Current assets 42.3 314.1      
Current liabilities 90.3 90.3      
Operating results (176.2) (23.7) 25.6    
Related parties [member] | Caixa Economica Federal [member]          
Disclosure of transactions between related parties [line items]          
Current assets   9.8      
Financial results 0.2   28.5    
Related parties [member] | Embraer Prev Sociedade De Previdncia Complementar [member]          
Disclosure of transactions between related parties [line items]          
Current liabilities 0.2 0.2      
Operating results (14.4) (22.9) (23.2)    
Related parties [member] | Brazilian Army [member]          
Disclosure of transactions between related parties [line items]          
Current liabilities 4.3 11.1      
Operating results   (1.2) 5.0    
Related parties [member] | Financiadora De EstudoE Projetos FINEP [member]          
Disclosure of transactions between related parties [line items]          
Current liabilities 13.0 15.7      
Non-current liabilities 43.5 64.6      
Financial results (2.3) (2.9) (2.9)    
Related parties [member] | Telecomunicacoes Brasileiras SA Telebras [member]          
Disclosure of transactions between related parties [line items]          
Operating results     (2.1)    
Related parties [member] | Marinha Do Brasil [member]          
Disclosure of transactions between related parties [line items]          
Current assets 0.9 6.6      
Operating results $ (12.6) $ (6.2) $ (2.7)