Discontinued Operations (Income Statement) (Parenthetical) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Lawn and Garden Business and WEK [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Tax expense (benefit) from provision for gain (Loss) on disposal	$ 0.2	$ (2.8)	$ 1.6