Deferred Taxes (Detail) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Provisions	$ 113.4	$ 110.8	$ 90.6
Costs capitalized for tax	35.9	19.1	21.3
Property, plant and equipment	25.0	14.8	15.5
Retirement Plans	50.8	66.8	60.8
Tax receivables, principally NOL’s	187.2	222.1	192.8
Deferred tax assets before allowances	412.3	433.6	381.0
Valuation allowances	(147.6)	(210.0)	(177.7)	$ (150.1)
Total	264.7	223.6	203.3
Acquired intangibles	(6.5)	(12.2)	(18.4)
Statutory tax allowances	0.3	0.0	(0.6)
Insurance deposit	0.0	0.0	(3.3)
Distribution taxes	(29.1)	(29.4)	(29.8)
Other	(4.2)	(4.9)	(2.9)
Total	(39.5)	(46.5)	(55.0)
Net deferred tax asset	$ 225.2	$ 177.1	$ 148.3