Schedule II, Valuation and Qualifying Accounts (Details) - Allowance for Doubtful Accounts [Member] - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning balance	[1]	$ 81.9	$ 76.8	$ 71.4
Charged to Costs & Expenses		37.7	31.0	31.6
Impact of Currency		1.0	(0.7)	(0.9)
Charged to Other Accounts	[2]	2.1	0.1	0.0
Write Offs, Write Downs & Deductions		(55.3)	(25.3)	(25.3)
Ending balance	[1]	$ 67.4	$ 81.9	$ 76.8

[1] Amounts include allowance for doubtful accounts classified as current and noncurrent.

[2] Amounts related to businesses acquired, net of amounts related to businesses disposed.