Deferred Tax Assets and Deferred Tax Liabilities (Detail) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Deferred Income Tax Assets And Liabilities [Line Items]
Employee benefits	$ 184.2	$ 180.1
Inventory	12.4	12.2
Receivables and rebates	31.7	29.6
Accrued expenses	259.8	165.2
Loss carryforwards and credits	77.7	81.4
Other	2.5	0.0
Gross deferred tax assets	568.3	468.5
Valuation allowance	(53.3)	(51.1)
Deferred Tax Assets, Net of Valuation Allowance, Total	515.0	417.4
Intangibles	346.2	338.8
Accelerated depreciation	16.9	16.3
Receivables and other	106.4	59.0
Deferred Tax Liabilities, Gross, Total	469.5	414.1
Deferred Tax Assets, Net, Total	$ 45.5	$ 3.3