Schedule II - Valuation And Qualifying Accounts (Details) - Allowance for doubtful accounts - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	$ 103.7	$ 100.3	$ 85.6
Charged to costs & expenses	30.0	31.2	27.1
Impact of currency	(0.7)	(3.8)	3.8
Charged to other accounts	0.0	1.3	3.5
Write-offs, write-downs & deductions	(27.6)	(25.3)	(19.7)
Balance at end of period	$ 105.4	$ 103.7	$ 100.3