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Financial Guarantees and Residual Value Guarantees - Schedule of Financial Guarantees and Residual Guarantees (Detail) - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Disclosure of financial guarantees and residual guarantees [line items]        
Financial guarantees and residual value guarantees $ 152.1 $ 156.8 $ 210.8 $ 293.1
Current portion 51.0 22.2    
Non-current portion 101.1 134.6    
Financial guarantee of residual value [member]        
Disclosure of financial guarantees and residual guarantees [line items]        
Financial guarantees and residual value guarantees 125.4 108.9 122.2 94.7
Accounts payable [member]        
Disclosure of financial guarantees and residual guarantees [line items]        
Financial guarantees and residual value guarantees 15.1 30.8 65.9 57.4
Financial guarantee [member]        
Disclosure of financial guarantees and residual guarantees [line items]        
Financial guarantees and residual value guarantees $ 11.6 $ 17.1 $ 22.7 $ 40.1