Acquisitions 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	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2018	[1]	Dec. 31, 2017	[1]	Dec. 31, 2016
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Gain (Loss) on expected disposal of discontinued businesses before income tax		$ (19.3)		$ (74.1)		$ 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) on expected disposal of discontinued businesses before income tax	$ (74.0)	$ (19.3)		$ (74.0)

[1] Loss on disposal of EMEA and Pacific Rim businesses for the years ended December 31, 2018 and 2017 represents the estimated write-down of EMEA and Pacific Rim assets based on our expected sales proceeds to be received upon closure of the transaction.