CASH AND CASH EQUIVALENTS CONTINUING OPERATIONS (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Noncurrent restricted cash
Restricted cash held in the rabbi trust for change in control payments	$ 30.2
Significant noncash transactions
Construction costs funded through accounts payable	139.5	$ 123.3
ITF fueling station sale financed with note receivable	2.8	0.0
Purchase of natural gas distribution business financed with note payable	2.6	0.0
Equity issued for employee stock ownership plan	$ 0.0	$ 1.7