Segment Information - Schedule of Corporate Assets (Detail) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Cash and cash equivalents	$ 389.6	$ 527.9	$ 1,028.4	$ 430.7
Deferred income tax assets, net of valuation allowances	597.3	670.5
Property, plant and equipment, net	1,448.1	1,515.5
LIFO reserve	(86.5)	(93.6)
Corporate
Segment Reporting Information [Line Items]
Cash and cash equivalents	(45.8)	94.6	494.9
Deferred income tax assets, net of valuation allowances	169.9	152.0	39.2
Software, net	98.8	82.1	71.1
Deferred compensation plan assets and Company owned life insurance assets	92.1	86.0	79.5
Property, plant and equipment, net	61.6	61.2	61.7
LIFO reserve	$ (86.5)	$ (93.6)	$ (92.0)