Restructuring - Costs Included in Selling, General & Administrative expenses on Consolidated Statements of Income (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Restructuring Cost and Reserve [Line Items]
Restructuring costs	$ 117.8	$ 88.3	$ 103.2
Severance and related costs
Restructuring Cost and Reserve [Line Items]
Restructuring costs	96.7	58.9	81.5
Other
Restructuring Cost and Reserve [Line Items]
Restructuring costs	$ 21.1	$ 29.4	$ 21.7