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Postretirement Benefit Plans - Changes in Projected Benefit Obligations of Pension and Other Employee-Related Defined Benefit Plans (Detail) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Change in benefit obligation      
Benefit obligation - December 31 $ 600.0 $ 521.9  
U.S. Pension Plans [Member]
      
Change in benefit obligation      
Benefit obligation - January 1 277.8 246.1  
Service cost 4.8 5.6 6.3
Interest cost 12.9 13.4 13.6
Actuarial loss 24.2 26.9  
Benefits and expenses paid (16.1) (15.1)  
Curtailment / Special termination benefit   0.9  
Benefit obligation - December 31 303.6 277.8 246.1
International Pension Plan [Member]
      
Change in benefit obligation      
Benefit obligation - January 1 52.3 52.5  
Service cost 1.0 0.9 0.9
Interest cost 2.5 2.5 2.4
Actuarial loss 14.8 (1.2)  
Benefits and expenses paid (3.1) (3.0)  
Assumed in acquisition 15.0 1.4  
Foreign currency translation 0.9 (0.8)  
Benefit obligation - December 31 83.4 52.3 52.5
Pension [Member]
      
Change in benefit obligation      
Benefit obligation - January 1 330.1 298.6  
Service cost 5.8 6.5 7.2
Interest cost 15.4 15.9 16.0
Actuarial loss 39.0 25.7  
Benefits and expenses paid (19.2) (18.1)  
Curtailment / Special termination benefit   0.9  
Assumed in acquisition 15.0 1.4  
Foreign currency translation 0.9 (0.8)  
Benefit obligation - December 31 387.0 330.1 298.6
Others Benefits [Member]
      
Change in benefit obligation      
Benefit obligation - January 1 191.8 175.5  
Service cost 2.5 1.8 1.5
Interest cost 9.5 9.5 9.3
Amendments (3.1)    
Actuarial loss 22.0 14.4  
Benefits paid (9.7) (9.4)  
Benefit obligation - December 31 $ 213.0 $ 191.8 $ 175.5