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Commitments and Contingencies - Additional Information (Detail)
$ in Millions
12 Months Ended
Dec. 31, 2018
USD ($)
employee
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Commitments and Contingencies Disclosure [Abstract]      
Reserves for pending legal disputes, including commercial disputes and other matters $ 11.0 $ 25.8  
Environmental reserves $ 9.0 9.0  
Loss Contingencies [Line Items]      
Percentage of employees that are members of trade union and employed under labor agreements 48.00%    
Rent expense $ 163.8 $ 144.7 $ 126.4
Unionized workforce subject to labor agreement expiring in 2019      
Loss Contingencies [Line Items]      
Percentage of employees that are members of trade union and employed under labor agreements 72.00%    
Number of employees | employee 81,400    
Unionized workforce subject to labor agreement expiring in 2019 | United States and Canada      
Loss Contingencies [Line Items]      
Percentage of employees that are members of trade union and employed under labor agreements 1.00%