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Employee Benefit and Retirement Plans - Schedule of Reconciliation of Benefit Obligations (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
United States Pension Plan of US Entity [Member]      
Change in plan assets:      
Fair value of plan assets at beginning of year $ 1,230.6    
Fair value of plan assets at end of year 1,271.1 $ 1,230.6  
International [Member]      
Change in plan assets:      
Fair value of plan assets at beginning of year 565.3    
Fair value of plan assets at end of year 621.2 565.3  
Pension Benefits [Member] | United States Pension Plan of US Entity [Member]      
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Benefit obligation at beginning of year 1,592.2 937.7  
Service cost 2.8 2.7 $ 3.2
Interest cost 50.5 45.1 41.3
Actuarial (gain) loss 84.9 (16.3)  
Benefits paid (103.0) (98.2)  
Acquisitions and dispositions, net   721.2  
Curtailments, settlements and other (41.2)    
Benefit obligation at end of year 1,586.2 1,592.2 937.7
Change in plan assets:      
Fair value of plan assets at beginning of year 1,230.6 722.9  
Actual return on plan assets 171.5 70.7  
Contributions 13.2 12.0  
Defined Benefit Plan, Benefits Paid (103.0) (98.2)  
Acquisitions and dispositions, net   523.2  
Settlements and other (41.2)    
Fair value of plan assets at end of year 1,271.1 1,230.6 722.9
Funded status at end of year (315.1) (361.6)  
Amounts recognized in the Consolidated Balance Sheets:      
Accrued current benefit cost-other accrued liabilities (12.9) (12.5)  
Accrued noncurrent benefit cost- other noncurrent liabilities (302.2) (349.1)  
Net amount recognized (315.1) (361.6)  
Pension Benefits [Member] | International [Member]      
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Benefit obligation at beginning of year 647.4 613.6  
Service cost 7.5 6.6 5.8
Interest cost 13.6 17.5 19.6
Actuarial (gain) loss 1.8 104.2  
Amendments 0.4    
Currency translation 72.2 (107.9)  
Benefits paid (24.0) (25.3)  
Acquisitions and dispositions, net (13.9) 64.8  
Curtailments, settlements and other (16.1) (26.1)  
Benefit obligation at end of year 688.9 647.4 613.6
Change in plan assets:      
Fair value of plan assets at beginning of year 565.3 560.3  
Actual return on plan assets 24.3 112.4  
Contributions 16.1 16.4  
Defined Benefit Plan, Foreign Currency Exchange Rate Changes, Plan Assets 60.8 (105.9)  
Defined Benefit Plan, Benefits Paid (24.0) (25.3)  
Acquisitions and dispositions, net (5.5) 34.0  
Settlements and other (15.8) (26.6)  
Fair value of plan assets at end of year 621.2 565.3 560.3
Funded status at end of year (67.7) (82.1)  
Amounts recognized in the Consolidated Balance Sheets:      
Prepaid benefit cost, included in other assets 65.4 48.7  
Accrued current benefit cost-other accrued liabilities (5.1) (4.4)  
Accrued noncurrent benefit cost- other noncurrent liabilities (128.0) (126.4)  
Net amount recognized (67.7) (82.1)  
Postretirement Benefits [Member]      
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Benefit obligation at beginning of year 74.6 67.9  
Service cost 0.1 0.1 0.3
Interest cost 2.2 2.2 3.4
Actuarial (gain) loss (0.4) 3.0  
Amendments (5.0)    
Benefits paid (6.4) (6.1)  
Acquisitions and dispositions, net   7.2  
Curtailments, settlements and other   0.3  
Benefit obligation at end of year 65.1 74.6 $ 67.9
Change in plan assets:      
Funded status at end of year (65.1) (74.6)  
Amounts recognized in the Consolidated Balance Sheets:      
Accrued current benefit cost-other accrued liabilities (5.8) (6.4)  
Accrued noncurrent benefit cost- other noncurrent liabilities (59.3) (68.2)  
Net amount recognized $ (65.1) $ (74.6)