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Interest in Entities - Summary of Financial Position of the Group Entities that have Non-Controlling Interest (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Jan. 01, 2017
Jan. 01, 2016
Dec. 31, 2015
Disclosure of subsidiaries [line items]            
Cash and cash equivalents $ 1,280.9 $ 1,270.8 $ 1,241.5 $ 1,241.5   $ 2,165.5
Current assets 7,071.0 7,079.6 6,823.6 6,823.6 $ 6,447.6  
Non current assets 4,222.3 4,895.0 4,896.2 4,896.2 5,260.1  
Current liabilities 3,028.6 2,803.2 3,227.9 3,227.8 3,147.4  
Non current liabilities 4,324.6 4,993.9 4,555.5 4,555.6 $ 4,741.2  
Noncontrolling interest 94.4 113.4   $ 92.4    
REVENUE 5,071.1 5,859.4 6,203.9      
Net income for the year (171.2) 280.0 180.3      
OGMA - Industria Aeronautica de Portugal S.A. [member]            
Disclosure of subsidiaries [line items]            
Cash and cash equivalents 12.9 11.1 23.7      
Current assets 168.9 207.9 155.1      
Non current assets 61.0 66.0 55.4      
Current liabilities 74.5 117.4 76.5      
Non current liabilities 0.1 0.9 7.3      
Noncontrolling interest 54.3 54.4 44.2      
REVENUE 240.5 222.1 216.3      
Net income for the year $ 9.6 $ 12.3 $ 11.2