Acquisitions and Dispositions - Pro Forma Adjustments Affecting Net Earnings (Detail) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2015
Business Combinations [Abstract]
Depreciation and amortization of purchased assets, pre-tax	$ (2.0)	$ 0.4
Acquisition-related expenses, pre-tax	(4.7)	18.6
Restructuring, impairment and other charges, pre-tax	21.1	24.1
Inventory fair value adjustment, pre-tax	3.2	3.2
Other pro forma adjustments, pre-tax	0.4	1.2
Income taxes	$ (9.5)	$ (10.4)