CASH AND CASH EQUIVALENTS (Details) - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Cash collected on behalf of Enbridge subsidiary for accounts receivable sales and not yet remitted to the Enbridge subsidiary (see Note 10)	$ 23.0	$ 19.0
Cash held in escrow for acquisitions (see Note 3)	0.0	6.0
Cash collateral for derivative activities (see Note 11)	0.0	12.6
Restricted Cash and Cash Equivalents	23.0	37.6
Obligations paid but not yet presented to financial institution	$ 8.5	$ 21.5