Segment Results (Schedule Of Net Sales To External Customers) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Segment Reporting Information [Line Items]
Total net sales to external customers	$ 709.9	$ 748.6	$ 1,377.9	$ 1,433.8
Building Products [Member]
Segment Reporting Information [Line Items]
Total net sales to external customers	297.0	305.0	600.1	611.9
Resilient Flooring [Member]
Segment Reporting Information [Line Items]
Total net sales to external customers	253.5	274.7	480.8	509.4
Wood Flooring [Member]
Segment Reporting Information [Line Items]
Total net sales to external customers	124.8	133.6	230.4	244.6
Cabinets [Member]
Segment Reporting Information [Line Items]
Total net sales to external customers	$ 34.6	$ 35.3	$ 66.6	$ 67.9