CAPITAL CONSTRUCTION FUND (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended		12 Months Ended
	Sep. 30, 2014	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
CAPITAL CONSTRUCTION FUND
Deposits into Capital Construction Fund	$ 65.5	$ 31.9	$ 4.4
Cash Deposits Into Capital Construction Fund	27.5			0
Eligible accounts receivable assigned to the Capital Construction Fund	38.0
Eligible accounts receivable assigned to the CCF	$ 150.5	$ 150.5		$ 112.0