Restructuring Activities - Associated Costs and Related Restructuring Charges (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Restructuring Cost And Reserve [Line Items]
Restructuring charges	$ 49.5	$ 36.8	$ 61.2	$ 110.1
2013 Earnings Quality Improvement Program
Restructuring Cost And Reserve [Line Items]
Associated costs	4.8		6.7
Restructuring charges	48.0		64.7
Total	52.8		71.4
2011-2014 Integration and Optimization Program
Restructuring Cost And Reserve [Line Items]
Associated costs	3.6	2.9	12.1	10.3
Restructuring charges	0.2	37.5	(4.8)	110.6
Total	$ 3.8	$ 40.4	$ 7.3	$ 120.9