Acquisition and Discontinued Operations (Summary of Carrying Amount of Major Classes of Assets and Liabilities Related to EMEA and Pacific Rim Businesses) (Parenthetical) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2018	Sep. 30, 2017
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Gain (loss) due to change in carrying value of discontinued operations net asset	$ 2.4		$ (21.0)	$ (0.1)
EMEA and Pacific Rim Business [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Gain (loss) due to change in carrying value of discontinued operations net asset	$ 2.4	$ (74.0)	$ (21.0)