SUBSEQUENT EVENTS (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	3 Months Ended		6 Months Ended
	Jul. 28, 2017	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Subsequent Event [Line Items]
Amount of distribution		$ 146.9	$ 202.9	$ 293.3	$ 404.6
Percentage of Distribution Retained				2.00%
Subsequent Event [Member]
Subsequent Event [Line Items]
Cash distributions paid per limited partner unit outstanding (in dollars per share)	$ 0.35
Cash Available for Distribution	$ 160.2
Distribution payment date	Aug. 14, 2017
Distribution record date	Aug. 07, 2017
Distribution declaration date	Jul. 28, 2017
Total amount of distribution paid	$ 129.6
Subsequent Event [Member] | I Units [Member]
Subsequent Event [Line Items]
Amount of distribution	30.0
Amount paid to parent	0.6
Series EA Interests [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Amount paid to parent	49.8
Amount paid to the noncontrolling interest	$ 33.2
Distribution declaration date	Jul. 28, 2017
Series ME Interests [Member]
Subsequent Event [Line Items]
Amount paid to parent				$ 26.9
Amount paid to the noncontrolling interest				80.7
Total amount of distribution paid				$ 107.6
Series ME Interests [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Amount paid to parent	$ 41.3
Amount paid to the noncontrolling interest	$ 13.8
Distribution declaration date	Jul. 28, 2017