CONSOLIDATED FINANCIAL INFORMATION (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Recognized discrete tax benefits	$ 9.7	$ (3.9)	$ 32.5	$ 0.9
Accounting Standards Update 2016-09
Recognized discrete tax benefits	10.8		26.8
Cumulative effect of new accounting principle in period of adoption	$ 1.9		$ 1.9

Amount after tax of increase (decrease) to equity or (increase) decrease to net assets, resulting from the cumulative effect adjustment of a new accounting principle applied in the period of adoption.

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant