SEGMENT REPORTING (Details 5) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting, Asset Reconciling Item [Line Items]
Revenues	$ 659.2	$ 679.8	$ 700.6	$ 690.0	$ 637.8	$ 653.8	$ 662.7	$ 644.7	$ 2,729.6	$ 2,599.0	$ 2,203.3
% of Revenues									100.00%	100.00%	100.00%
United States
Segment Reporting, Asset Reconciling Item [Line Items]
Revenues									$ 966.3	$ 859.1	$ 788.3
% of Revenues									35.40%	33.10%	35.80%
Europe
Segment Reporting, Asset Reconciling Item [Line Items]
Revenues									$ 663.5	$ 684.6	$ 549.3
% of Revenues									24.30%	26.30%	24.90%
Asia, Pacific Rim, Middle East and other
Segment Reporting, Asset Reconciling Item [Line Items]
Revenues									$ 1,099.8	$ 1,055.3	$ 865.7
% of Revenues									40.30%	40.60%	39.30%