CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Operating revenues:
Transportation and other services	$ 616.4	$ 634.6	$ 1,817.6	$ 1,885.6
Total operating revenues	616.4	634.6	1,817.6	1,885.6
Operating expenses:
Environmental costs, net of recoveries	1.2	(8.7)	15.0	8.3
Operating and administrative	162.6	152.0	474.0	428.0
Power	80.1	74.3	221.0	206.8
Depreciation and amortization	111.8	109.4	328.9	315.7
Gain on sale of assets	(5.5)	0.0	(67.6)	0.0
Asset impairment	0.0	756.7	0.0	757.1
Operating Expenses	350.2	1,083.7	971.3	1,715.9
Operating income (loss)	266.2	(449.1)	846.3	169.7
Interest expense, net	(104.1)	(103.4)	(305.8)	(301.2)
Allowance for equity used during construction	12.2	10.0	33.2	35.7
Other income	21.8	0.6	33.2	0.9
Income before income taxes	196.1	(541.9)	606.9	(94.9)
Income tax benefit (expense)	(0.1)	(1.6)	0.4	(5.2)
Income from continuing operations	196.0	(543.5)	607.3	(100.1)
Loss from discontinued operations, net of tax	0.0	(31.1)	(56.8)	(124.4)
Net income (loss)	196.0	(574.6)	550.5	(224.5)
Less: Net income (loss) attributable to:
Noncontrolling interests	102.9	(191.9)	261.8	(52.8)
Series 1 preferred unit distributions	0.0	22.5	29.0	67.5
Accretion of discount on Series 1 preferred units	0.0	1.2	8.5	3.5
Net income (loss) attributable to general and limited partner ownership interests in Enbridge Energy Partners, L.P.	93.1	(406.4)	251.2	(242.7)
Net income (loss) allocable to common units and i-units:
Income (loss) from continuing operations	82.0	(432.7)	254.1	(313.9)
Income (loss) from discontinued operations	0.0	(19.9)	(38.0)	(86.9)
Net income allocable to common units and i-units	$ 82.0	$ (452.6)	$ 216.1	$ (400.8)
Net income (loss) per common unit and i-unit (basic and diluted):
Income from continuing operations (in dollars per share)	$ 0.19	$ (1.25)	$ 0.65	$ (0.91)
Loss from discontinued operations (in dollars per share)	0.00	(0.06)	(0.10)	(0.25)
Net income per common unit and i-unit (in dollars per share)	$ 0.19	$ (1.31)	$ 0.55	$ (1.16)
Weighted average common units and i-units outstanding (basic and diluted) (in shares)	421.0	349.1	391.6	347.0
Distributions paid per limited partner unit (in dollars per share)	$ 0.35	$ 0.583	$ 1.283	$ 1.749
Third Party [Member]
Operating revenues:
Transportation and other services	$ 595.5	$ 605.9	$ 1,745.2	$ 1,804.4
Operating expenses:
Operating and administrative	77.0	77.0	238.7	201.0
Affiliated Entity [Member]
Operating revenues:
Transportation and other services	20.9	28.7	72.4	81.2
Operating expenses:
Operating and administrative	$ 85.6	$ 75.0	$ 235.3	$ 227.0