CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME [Abstract]
Net income	$ 184.5	$ 117.5	$ 341.8	$ 385.7
Other comprehensive income (loss), net of tax expense (Note 12)	(131.0)	55.5	(181.2)	(80.6)
Comprehensive income	53.5	173.0	160.6	305.1
Less:
Net income attributable to noncontrolling interest (Note 10)	77.8	70.7	139.1	149.4
Net income attributable to Series 1 preferred unit distributions	22.5	22.5	67.5	67.5
Net income attributable to accretion of discount on Series 1 preferred units	2.1	3.8	10.1	11.1
Other comprehensive income (loss) allocated to noncontrolling interest	(1.3)	2.1	(3.9)	1.8
Comprehensive income (loss) attributable to general and limited partner ownership interests in Enbridge Energy Partners, L.P.	$ (47.6)	$ 73.9	$ (52.2)	$ 75.3