Acquisitions and Dispositions - Pro Forma Adjustments Affecting Net Earnings (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Business Combinations [Abstract]
Depreciation and amortization of purchased assets, pre-tax	$ 1.3	$ (2.7)	$ 2.9	$ (7.2)
Acquisition-related expenses, pre-tax	(0.1)	2.1	18.8	(14.4)
Restructuring, impairment and other charges, pre-tax	6.3	(6.2)	28.4	(27.4)
Inventory fair value adjustments, pre-tax	0	0	14.3	(14.3)
Other pro forma adjustments, pre-tax	2.2	(7.7)	(2.3)	(6.3)
Income taxes	$ (3.4)	$ 1.4	$ (17.1)	$ 19.3