Average Assets for Segments (Detail) (USD $) In Millions, unless otherwise specified	Jun. 30, 2013		Dec. 31, 2012
Segment Reporting Information [Line Items]
Assets	$ 3,278.7		$ 3,254.9
Residential Furnishings
Segment Reporting Information [Line Items]
Assets	587.8		602.9
Commercial Fixturing & Components
Segment Reporting Information [Line Items]
Assets	149.9		159.1
Industrial Materials
Segment Reporting Information [Line Items]
Assets	242.8		237.1
Specialized Products
Segment Reporting Information [Line Items]
Assets	223.0		225.4
Average current liabilities included in segment numbers above
Segment Reporting Information [Line Items]
Assets	447.9		439.1
Unallocated assets
Segment Reporting Information [Line Items]
Assets	1,578.2	[1]	1,685.5	[1]
Difference between average assets and period-end balance sheet
Segment Reporting Information [Line Items]
Assets	$ 49.1		$ (94.2)

[1] Primarily goodwill, other intangibles, cash, LIFO reserves, deferred tax assets and businesses sold or classified as held for sale during the second quarter of 2013.