Armstrong Flooring, Inc. Annual report pursuant to Section 13 and 15(d)

Discontinued Operations - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
DLW Subsidiary \| Discontinued operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Pension benefit liability			$ 115.0
Deferred tax asset and tax benefit		$ 43.4
Loss on disposal before income tax	$ 0.1	1.5	13.5
Cabinets \| Disposed of by sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss on disposal before income tax		$ (0.5)	$ 3.5