Schedule II - Valuation and Qualifying Accounts (Details) - Allowance for Doubtful Accounts - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	$ 149.3	$ 147.4	$ 148.1
Charged to costs & expenses	57.1	42.8	27.9
Impact of currency	(7.2)	(5.8)	(1.6)
Charged to other accounts	21.1	13.3	4.2
Write-offs, write-downs & deductions	(52.8)	(48.4)	(31.2)
Balance at end of period	$ 167.5	$ 149.3	$ 147.4