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Pension and Other Postretirement Benefit Plans - Reconciliation of Change in Benefit Obligation and Change in Plan Assets (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
U.S. Pension      
Change in benefit obligation:      
Benefit obligation at beginning of period $ 717.8 $ 586.7  
Service cost 4.7 3.7 $ 2.9
Interest cost 28.7 28.5 26.2
Actuarial (gain) loss (42.5) 119.8  
Benefits paid (22.1) (20.9)  
Curtailment 0.0 0.0  
Special termination benefits 0.0 0.0  
Translation adjustment 0.0 0.0  
Benefit obligation at end of period 686.6 717.8 586.7
Change in plan assets:      
Fair value of plan assets at beginning of period 519.2 503.5  
Actual return on plan assets (3.7) 34.2  
Employer contributions 28.7 2.4  
Benefits paid (22.1) (20.9)  
Translation adjustment 0.0 0.0  
Fair value of plan assets at end of period 522.1 519.2 503.5
Funded status (164.5) (198.6)  
Amounts recognized in the consolidated balance sheet:      
Other long-term assets 0.0 0.0  
Accrued liabilities (2.5) (2.5)  
Other long-term liabilities (162.0) (196.1)  
Foreign Pension      
Change in benefit obligation:      
Benefit obligation at beginning of period 493.0 459.5  
Service cost 8.4 8.8 10.2
Interest cost 16.2 20.4 20.7
Actuarial (gain) loss (12.4) 66.5  
Benefits paid (19.9) (22.4)  
Curtailment 6.5 0.0  
Special termination benefits 0.0 0.0  
Translation adjustment (64.4) (39.8)  
Benefit obligation at end of period 427.4 493.0 459.5
Change in plan assets:      
Fair value of plan assets at beginning of period 415.1 417.0  
Actual return on plan assets 19.5 40.7  
Employer contributions 13.9 15.2  
Benefits paid (19.9) (22.4)  
Translation adjustment (60.4) (35.4)  
Fair value of plan assets at end of period 368.2 415.1 417.0
Funded status (59.2) (77.9)  
Amounts recognized in the consolidated balance sheet:      
Other long-term assets 43.7 45.5  
Accrued liabilities (3.4) (3.0)  
Other long-term liabilities (99.5) (120.4)  
U.S. Other Postretirement      
Change in benefit obligation:      
Benefit obligation at beginning of period 83.3 91.6  
Service cost 0.2 0.2 0.1
Interest cost 3.1 4.0 3.6
Actuarial (gain) loss (3.1) (8.0)  
Benefits paid (4.6) (4.5)  
Curtailment 0.0 0.0  
Special termination benefits 0.0 0.0  
Translation adjustment 0.0 0.0  
Benefit obligation at end of period 78.9 83.3 91.6
Change in plan assets:      
Fair value of plan assets at beginning of period 0.0 0.0  
Actual return on plan assets 0.0 0.0  
Employer contributions 4.6 4.5  
Benefits paid (4.6) (4.5)  
Translation adjustment 0.0 0.0  
Fair value of plan assets at end of period 0.0 0.0 0.0
Funded status (78.9) (83.3)  
Amounts recognized in the consolidated balance sheet:      
Other long-term assets 0.0 0.0  
Accrued liabilities (5.1) (5.1)  
Other long-term liabilities (73.8) (78.2)  
Foreign Other Postretirement      
Change in benefit obligation:      
Benefit obligation at beginning of period 46.8 42.4  
Service cost 0.7 0.9 1.1
Interest cost 1.7 2.0 2.0
Actuarial (gain) loss (1.2) 6.9  
Benefits paid (2.2) (2.6)  
Curtailment (2.8) 0.0  
Special termination benefits 0.8 0.8  
Translation adjustment (7.3) (3.6)  
Benefit obligation at end of period 36.5 46.8 42.4
Change in plan assets:      
Fair value of plan assets at beginning of period 0.0 0.0  
Actual return on plan assets 0.0 0.0  
Employer contributions 2.2 2.6  
Benefits paid (2.2) (2.6)  
Translation adjustment 0.0 0.0  
Fair value of plan assets at end of period 0.0 0.0 $ 0.0
Funded status (36.5) (46.8)  
Amounts recognized in the consolidated balance sheet:      
Other long-term assets 0.0 0.0  
Accrued liabilities (1.6) (2.0)  
Other long-term liabilities $ (34.9) $ (44.8)