Schedule of Acquisitions (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012 Industrial Materials acquisition	Sep. 30, 2011 Residential Furnishings acquisition
Acquired Finite-Lived Intangible Assets [Line Items]
Number of Acquisitions	2	2
In Year of Acquisition	$ 54.3	$ 1.9
Expected to Provide Income Tax Benefit	$ 54.3	$ 1.9