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Restructuring Activities - Associated Costs and Related Restructuring Charges (Detail) (USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Restructuring Cost and Reserve [Line Items]        
Restructuring charges $ 11.9 $ 26.3 $ 11.7 $ 73.3
2013 Earnings Quality Improvement Program [Member]
       
Restructuring Cost and Reserve [Line Items]        
Associated costs 1.8   1.8  
Restructuring charges 16.7   16.7  
Total 18.5   18.5  
2011-2014 Integration and Optimization Program [Member]
       
Restructuring Cost and Reserve [Line Items]        
Associated costs 3.2 1.6 8.5 7.4
Restructuring charges (4.8) 27.1 (5.0) 74.4
Total $ (1.6) $ 28.7 $ 3.5 $ 81.8