Discontinued Operations and Assets and Liabilities Held for Sale (Financial Components of Discontinued Operations) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended			15 Months Ended
	Dec. 31, 2015	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2016
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Loss from discontinued operations, net of tax		$ 0.0	$ 0.0	$ (14.0)
Discontinued Operations | North America Segment
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Total revenue				135.2
Cost of sales				53.2
Selling, general and administrative expenses				91.5
Operating (loss) income				(9.5)
Other income (expense) items				0.6
Loss from discontinued operations, before tax				(8.9)
Loss on sale of discontinued operations, before tax	$ (340.0)			(15.6)	$ (355.6)
Income taxes				10.5
Loss from discontinued operations, net of tax				$ (14.0)