GOODWILL AND INTANGIBLE FRANCHISE RIGHTS (Goodwill) (Details) - USD ($) $ in Millions	12 Months Ended		180 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2016
Goodwill [Roll Forward]
Net, beginning balance	$ 130.2	$ 104.0
Acquisitions		28.3
Divestitures	(2.1)	(2.1)
Net, ending balance	$ 128.1	$ 130.2	$ 128.1
Goodwill, impairment			$ 537.7