Segment Results (Narrative) (Details) (USD $) In Millions, unless otherwise specified					1 Months Ended					3 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2014 Resilient Flooring [Member]	Dec. 31, 2013 Resilient Flooring [Member]	Jun. 30, 2014 Wood Flooring [Member]	Sep. 30, 2014 Wood Flooring [Member]	Dec. 31, 2013 Wood Flooring [Member]	Sep. 30, 2014 Unallocated Corporate Segment [Member]	Dec. 31, 2013 Unallocated Corporate Segment [Member]	Sep. 30, 2014 Australia [Member] Resilient Flooring [Member]	Jun. 30, 2014 Australia [Member] Resilient Flooring [Member]	Sep. 30, 2014 China [Member] Wood Flooring [Member]	Jun. 30, 2014 China [Member] Wood Flooring [Member]	Sep. 30, 2014 Europe [Member] Resilient Flooring [Member]
Segment Reporting Information [Line Items]
Accelerated depreciation for machinery and equipment										$ 1.7	$ 0.5	$ 3.0	$ 1.0
Asset impairment charge in COGS					4.4								0.8	11.9
Segment assets	3,006.1	2,916.6	649.7	635.2		359.9	335.2	876.4	874.3					152.0
Property, plant and equipment, net	1,128.4	1,107.2												73.4
Inventory	415.9	381.7												57.1
Liabilities														171.3
Unfunded pension liability														$ 126.5