Deferred Tax Assets and Deferred Tax Liabilities (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Deferred Income Tax Assets And Liabilities [Line Items]
Employee benefits	$ 169.9	$ 168.8
Inventory		16.6
Receivables and rebates	24.1	25.8
Accrued expenses	34.7	30.5
Loss carryforwards and credits	112.5	112.4
Gross deferred tax assets	341.2	354.1
Valuation allowance	(32.5)	(32.2)
Deferred Tax Assets, Net of Valuation Allowance, Total	308.7	321.9
Intangibles	252.4	234.2
Accelerated depreciation	25.8	22.8
Other	3.9	3.2
Deferred Tax Liabilities, Net, Total	282.1	260.2
Deferred Tax Assets, Net, Total	$ 26.6	$ 61.7