Discontinued Operations (Summary of Results of Operations Related to AFI) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Income tax expense	$ (14.7)	$ (0.7)	$ (16.6)	$ (44.1)
Earnings (loss) from discontinued operations	$ 14.7	1.5	16.7	44.0
AFI [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Net sales		322.6	284.4	908.6
Cost of goods sold		255.8	237.2	735.0
Gross profit		66.8	47.2	173.6
Selling, general and administrative expenses		46.4	50.5	129.6
Operating income (loss)		20.4	(3.3)	44.0
Other non-operating expense		2.4	1.1	2.4
Earnings (loss) from discontinued operations before income taxes		18.0	(4.4)	41.6
Income tax expense		7.4	0.1	18.1
Earnings (loss) from discontinued operations		$ 10.6	$ (4.5)	$ 23.5