Discontinued Operations (Summary of Results of Operations Related to AFI) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Income tax expense	$ (15.2)	$ (41.8)	$ (2.5)
(Loss) earnings from discontinued operations	15.3	41.6	(14.5)
AFI [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Net sales	284.4	1,188.7	1,221.0
Cost of goods sold	237.2	962.3	1,020.8
Gross profit	47.2	226.4	200.2
Selling, general and administrative expenses	50.5	179.5	148.4
Intangible asset impairments			10.8
Operating (loss) income	(3.3)	46.9	41.0
Other non-operating expense, net	1.1	3.1	4.2
(Loss) earnings from discontinued operations before income tax	(4.4)	43.8	36.8
Income tax expense	0.1	17.8	13.9
(Loss) earnings from discontinued operations	$ (4.5)	$ 26.0	$ 22.9