SCHEDULE II VALUATION AND QUALIFYING ACCOUNTS (Details) - Allowance for doubtful accounts — Trade receivables (Continuing operations) - 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	$ 45.8	$ 74.2	$ 56.1
Impact of the adoption of ASU 2014-09	0.0	11.9	0.0
Additions to costs and expenses	44.6	61.6	51.6
Acquisitions	0.0	0.0	1.5
Deductions or write-offs	(48.3)	(98.4)	(41.7)
Foreign currency translation adjustments	0.7	(3.5)	6.7
Balance at end of period	$ 42.8	$ 45.8	$ 74.2