Enbridge Energy Management L L C (EEQ) 10-K 18 Feb 15 2014 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
	Dec. 31, 2014	Feb. 13, 2015	Jun. 30, 2014
Document and Entity Information [Abstract]
Entity Registrant Name	ENBRIDGE ENERGY MANAGEMENT L L C
Entity Central Index Key	1173911
Document Type	10-K
Document Period End Date	31-Dec-14
Amendment Flag	FALSE
Current Fiscal Year End Date	-19
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		69,343,557
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	FY
Trading Symbol	eeq
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$2,056,805,158

STATEMENTS_OF_INCOME

STATEMENTS OF INCOME (USD $)	12 Months Ended
In Millions, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
STATEMENTS OF INCOME [Abstract]
Equity income (loss) from investment in Enbridge Energy Partners, L.P.	$43.70	($26.30)	$50.50
Income (loss) before income tax expense (benefit)	43.7	-26.3	50.5
Income tax expense (benefit) (Note 5)	16.6	-8.2	18.7
Net income (loss)	$27.10	($18.10)	$31.80
Net income (loss) per share, basic and diluted (in dollars per share)	$0.41	($0.33)	$0.80
Weighted average shares outstanding (in shares)	66.1	54.2	39.9

STATEMENTS_OF_COMPREHENSIVE_IN

STATEMENTS OF COMPREHENSIVE INCOME (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
STATEMENTS OF COMPREHENSIVE INCOME [Abstract]
Net income (loss)	$27.10	($18.10)	$31.80
Equity in other comprehensive income (loss) of Enbridge Energy Partners, L.P., net of tax (benefit) expense of $(8.8), $15.1 and $(0.3), respectively	-14.7	25.6	-0.5
Comprehensive income	$12.40	$7.50	$31.30

STATEMENTS_OF_COMPREHENSIVE_IN1

STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
STATEMENTS OF COMPREHENSIVE INCOME [Abstract]
Other comprehensive income (loss), tax expense (benefit)	($8.80)	$15.10	($0.30)

STATEMENTS_OF_CASH_FLOWS

STATEMENTS OF CASH FLOWS (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash provided by (used in) operating activities:
Net income (loss)	$27.10	($18.10)	$31.80
Adjustments to reconcile net income (loss) to net cash flows provided by (used in) operating activities:
Equity (income) loss from investment in Enbridge Energy Partners, L.P.	-43.7	26.3	-50.5
Changes in operating assets and liabilities, net of cash acquired:
Due from affiliates	0.1		-0.2
Due to affiliates	-0.1		0.2
Deferred income taxes (Note 5)	16.6	-8.2	18.7
Accounts payable and accrued liabilities		0.7
Other		-0.1	-0.1
Net cash provided by (used in) operating activities		0.6	-0.1
Cash used in investing activities:
Investment in Enbridge Energy Partners, L.P.		-508.5
Net cash used in investing activities		-508.5
Cash provided by financing activities:
Net proceeds from share issuance (Note 3)		508.5
Net cash provided by financing activities		508.5
Net increase (decrease) in cash and cash equivalents		0.6	-0.1
Cash and cash equivalents at beginning of year	0.7	0.1	0.2
Cash and cash equivalents at end of period	$0.70	$0.70	$0.10

STATEMENTS_OF_FINANCIAL_POSITI

STATEMENTS OF FINANCIAL POSITION (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
ASSETS
Cash	$0.70	$0.70
Due from affiliates	0.2	0.3
Investment in Enbridge Energy Partners, L.P. (Note 3)	667.1	1,269.80
Deferred income tax asset (Notes 3 and 5)	73.7
Assets, total	741.7	1,270.80
LIABILITIES AND SHAREHOLDERS' EQUITY
Accounts payable and accrued liabilities		0.7
Due to affiliates	0.1	0.2
Deferred income tax liability (Note 5)		150.8
Liabilities, total	0.1	151.7
Commitments and contingencies
Shareholders' equity: (Note 3)
Voting shares-unlimited authorized; 5.15 and 4.81 issued and outstanding at December 31, 2014 and December 31, 2013, respectively
Listed shares-unlimited authorized; 68,305,182 and 63,743,094 issued and outstanding at December 31, 2014 and December 31, 2013, respectively	1,358	1,603.90
Accumulated deficit	-592.7	-475.8
Accumulated other comprehensive loss	-23.7	-9
Total shareholders' equity	741.6	1,119.10
Total liabilities and stockholders' equity	$741.70	$1,270.80

STATEMENTS_OF_FINANCIAL_POSITI1

STATEMENTS OF FINANCIAL POSITION (Parenthetical)	Dec. 31, 2014	Dec. 31, 2013
Voting Shares [Member]
Outstanding (in shares)	5.15	4.81
Issued (in shares)	5.15	4.81
Listed Shares [Member]
Outstanding (in shares)	68,305,182	63,743,094
Issued (in shares)	68,305,182	63,743,094

STATEMENTS_OF_SHAREHOLDERS_EQU

STATEMENTS OF SHAREHOLDERS' EQUITY (USD $)	Total	Voting Shares [Member]	Listed Shares [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
In Millions, except Share data
Beginning Balance at Dec. 31, 2011			$882.30	($290.70)	($34.10)
Beginning Balance (in shares) at Dec. 31, 2011		4.19	38,566,330
Net income (loss)	31.8			31.8
Net proceeds and issuance costs from share issuance (Note 3)
Capital account adjustments (Note 3)			14.4
Share distributions (Note 3)			85
Share distributions (Note 3)				-85
Share distributions (Note 3) (in shares)		0.29	2,632,090
Equity in other comprehensive income (loss) of Enbridge Energy Partners, L.P.	-0.5				-0.5
Ending Balance at Dec. 31, 2012	603.2		981.7	-343.9	-34.6
Ending Balance (in shares) at Dec. 31, 2012		4.48	41,198,420
Net income (loss)	-18.1			-18.1
Net proceeds and issuance costs from share issuance (Note 3)			508.5
Capital account adjustments (Note 3)			-0.1
Share distributions (Note 3)			113.8
Share distributions (Note 3)				-113.8
Share distributions (Note 3) (in shares)		0.33	22,544,674
Equity in other comprehensive income (loss) of Enbridge Energy Partners, L.P.	25.6				25.6
Ending Balance at Dec. 31, 2013	1,119.10		1,603.90	-475.8	-9
Ending Balance (in shares) at Dec. 31, 2013		4.81	63,743,094
Net income (loss)	27.1			27.1
Net proceeds and issuance costs from share issuance (Note 3)
Capital account adjustments (Note 3)			-389.9
Share distributions (Note 3)			144
Share distributions (Note 3)				-144
Share distributions (Note 3) (in shares)		0.34	4,562,088
Equity in other comprehensive income (loss) of Enbridge Energy Partners, L.P.	-14.7				-14.7
Ending Balance at Dec. 31, 2014	$741.60		$1,358	($592.70)	($23.70)
Ending Balance (in shares) at Dec. 31, 2014		5.15	68,305,182

GENERAL

GENERAL	12 Months Ended
	Dec. 31, 2014
GENERAL [Abstract]
GENERAL	1. GENERAL
	Enbridge Energy Management, L.L.C., referred to herein as “we,” “us,” “our,” the “Company,” or “Enbridge Management,” is a publicly traded Delaware limited liability company that was formed on May 14, 2002. Our listed shares, or Listed Shares, are traded on the New York Stock Exchange, or NYSE, under the symbol EEQ. We are a limited partner of Enbridge Energy Partners, L.P., which we also refer to as the Partnership, through our ownership of i-units, a special class of the Partnership's limited partner interests. The Partnership's Class A common units are traded on the NYSE under the symbol EEP, which together with the Class B common units, we refer to as common units. On July 1, 2014, the Partnership entered into an equity restructuring transaction, whereby they issued two new classes of limited partner interests designated as Class D units and Incentive Distribution Units, or IDUs. For more information see Footnote 3. Shareholders Equity - Partnership Equity Restructuring. Under a delegation of control agreement with the Partnership and its general partner, Enbridge Energy Company, Inc., or the General Partner, we manage the Partnership's business and affairs. The General Partner is an indirect, wholly-owned subsidiary of Enbridge Inc., a leading energy transportation and distribution company located in Calgary, Alberta, Canada, which we refer to as Enbridge. The General Partner owns 5.15 voting shares, which is 100% of our voting shares, as well as 7,982,581 Listed Shares, which is 11.7% of our Listed Shares, while the remaining 60,322,601 Listed Shares, which is 88.3% of our Listed Shares, were held by the public at December 31, 2014.

SUMMARY_OF_SIGNIFICANT_ACCOUNT

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	12 Months Ended
	Dec. 31, 2014
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES [Abstract]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
	We prepare our financial statements in accordance with accounting principles generally accepted in the United States of America. Our preparation of these financial statements requires us to make estimates and assumptions that affect the reported amount of assets, liabilities, revenues and expenses, and the disclosure of contingent assets and liabilities. We regularly evaluate these estimates utilizing historical experience, consultation with experts and other methods we consider reasonable under the circumstances. Nevertheless, actual results may differ significantly from these estimates. We record the effect of any revisions to these estimates in our financial statements in the period in which the facts that give rise to the revision become known.
	Accounting for Investment in the Partnership
	We use the equity method of accounting for our ownership in the Partnership because we exercise significant influence over the Partnership pursuant to a delegation of control agreement among the General Partner, the Partnership and us. Our share of earnings of the Partnership is recorded in the period in which it is earned after the Partnership's net income is adjusted for preferred distributions and then using the two-class method. As of December 31, 2014 and 2013, we owned approximately 15.2% and 16.9%, respectively, of the Partnership. Our ownership percentage changes as the Partnership issues additional limited partner units. Changes in the calculation of our ownership percentage affect our net income and comprehensive income.
	The distributable amount of the Class D Units and IDUs are divided among the Partnership's limited partners: (1) Class A common units, (2) Class B common units and (3) i-units based on our ownership interest in the Partnership. Thus, our “Equity income (loss) from investment in Enbridge Energy Partners, L.P.” on our statements of income also includes a pro-rata share of these costs every quarter.
	Furthermore, our “Equity income (loss) from investment in Enbridge Energy Partners, L.P.” on our statements of income is adjusted for any reallocation of the Partnership's capital accounts needed to bring a negative balance in any Partnership's class of capital accounts back to zero.
	Capital Account Adjustments
	The Partnership records an adjustment to the carrying value of its book capital accounts when it issues additional common units and the new issuance price per unit is greater than or less than the average cost per unit for each class of units. The Partnership also records an adjustment to the carrying value of its book capital accounts when it restructures its equity and any time that EEP drops down additional ownership in Midcoast Operating Limited Partners, or MOLP, to Midcoast Energy Partners, L.P., or MEP. We refer to these adjustments as capital account adjustments. We recognize any capital account adjustments recorded by the Partnership to the book capital account it maintains for our i-units by increasing or decreasing our investment in the Partnership and recording a corresponding capital account adjustment directly to “Shareholders' equity” on our statements of financial position.
	Net Income Per Share
	Both basic and diluted earnings per share are computed based on the weighted-average number of our shares outstanding during each period. We have no securities outstanding that may be converted into or exercised for our shares.
	Income Taxes
	We are a limited liability company that has elected to be treated as a corporation for U. S. federal income tax purposes. We recognize deferred income tax assets and liabilities for temporary differences between the basis of our assets and liabilities for financial reporting and tax purposes. Changes in tax legislation are included in the relevant computations in the period in which the legislation is enacted. Temporary differences and associated deferred tax expense and deferred tax liabilities result from recording our equity in the earnings of the Partnership, which will not become taxable until the Partnership is liquidated or the i-units are otherwise monetized, in addition to capital account adjustments.
	We are a party to a tax indemnification agreement with Enbridge. Pursuant to this tax indemnification agreement, Enbridge agrees to indemnify us from any tax liability attributable to our formation or our management of the business and affairs of the Partnership and from any taxes arising out of a transaction involving the i-units owned, to the extent the transaction does not generate cash sufficient to pay our taxes with respect to such transaction, in each case, other than any Texas franchise taxes and other capital-based foreign, state or local taxes that are required to be paid or reimbursed by the Partnership under the delegation of control agreement.
	The delegation of control agreement states that the General Partner bears the economic impact for our taxes only in the event we do not have cash sufficient to pay them. As a result, we accrue state income taxes in addition to federal income tax.
	Comprehensive Income
	Comprehensive income differs from net income due to the equity in other comprehensive income or loss of the Partnership. The Partnership enters into a variety of derivative financial instruments to mitigate its exposure to commodity price and interest rate risk, most of which are qualified cash flow hedges under the applicable authoritative accounting guidance for derivative activities. As such, changes in the fair market value of the Partnership's derivative financial instruments produce fluctuations in our comprehensive income, which is reflected as equity in other comprehensive income or loss of the Partnership.

SHAREHOLDERS_EQUITY

SHAREHOLDERS' EQUITY	12 Months Ended
	Dec. 31, 2014
SHAREHOLDERS' EQUITY [Abstract]
SHAREHOLDERS' EQUITY	3. SHAREHOLDERS' EQUITY
	Share Distributions
	Our authorized capital structure consists of two classes of interests: (1) Listed Shares, which represent limited liability company interests with limited voting rights, and (2) voting shares, which represent limited liability company interests with full voting rights, all voting shares of which are held by the General Partner.
	We make share distributions on a quarterly basis at the same time that the Partnership declares and makes cash distributions to the General Partner and limited partner interests other than the i-units. We do not receive cash distributions on the i-units we own and do not otherwise have any cash flow attributable to our ownership of the i-units. Instead, when the Partnership makes cash distributions to the General Partner and other limited partner interests, we receive additional i-units under the terms of the Partnership's partnership agreement. The amount of the additional i-units we receive is calculated by dividing the amount of the per unit cash distribution paid by the Partnership on each of its Class A and B common units by the average closing price of one of our Listed Shares on the NYSE as determined for a 10 trading day period ending on the trading day immediately prior to the ex-dividend date for our shares multiplied by the number of shares outstanding on the record date. We concurrently distribute additional shares to our shareholders that are equivalent in number to the additional i-units we receive from the Partnership. As a result, the number of our outstanding shares is equal to the number of i-units that we own in the Partnership.
	The following table sets forth the details regarding our share distributions, as approved by our board of directors for the years ended December 31, 2014, 2013 and 2012.
							Distribution			Average						Listed			Shares
							per Unit			Closing			Additional			Shares			distributed
	Distribution				Distribution		of the			Price of the			i-units			distributed			to General
	Declaration Date		Record Date		Payment Date		Partnership			Listed Shares			owned			to Public			Partner
	2014
		31-Oct	7-Nov		14-Nov		$	0.555		$	35.75			1,044,292			922,250			122,042
		31-Jul	7-Aug		14-Aug		$	0.555		$	34.53			1,064,113			939,754			124,359
		30-Apr	8-May		15-May		$	0.5435		$	29.14			1,212,031			1,070,385			141,646
		30-Jan	7-Feb		14-Feb		$	0.5435		$	27.9			1,241,652			1,096,544			145,108
														4,562,088			4,028,933			533,155
	2013
		October 31	7-Nov		14-Nov		$	0.5435		$	29.25			1,162,989			1,027,074			135,915
		July 29	7-Aug		14-Aug		$	0.5435		$	31.85			908,499			785,809			122,690
		April 30	8-May		15-May		$	0.5435		$	29.5			963,274			833,187			130,087
		30-Jan	7-Feb		14-Feb		$	0.5435		$	30.45			735,227			611,430			123,797
														3,769,989			3,257,500			512,489
	2012
		October 31	7-Nov		14-Nov		$	0.5435		$	31.65			695,596			578,472			117,124
		July 30	7-Aug		14-Aug		$	0.5435		$	31.43			688,548			572,611			115,937
		April 30	7-May		15-May		$	0.5325		$	32.28			646,118			537,325			108,793
		30-Jan	7-Feb		14-Feb		$	0.5325		$	34.12			601,828			500,493			101,335
														2,632,090			2,188,901			443,189
	We had non-cash operating activities in the form of i-units distributed to us by the Partnership and corresponding non-cash financing activities in the form of share distributions to our shareholders in the amounts of $144.0 million, $113.8 million and $85.0 million during the years ended December 31, 2014, 2013 and 2012, respectively.
	Issuance of Listed Shares
	In March and September 2013, we completed public offerings of 10,350,000 and 8,424,686 Listed Shares, respectfully, representing limited liability company interests with limited voting rights, at a price to the underwriters of $26.44 and $28.02 per Listed Share, respectively. We received net proceeds of $272.9 million and $235.6 million for the March and September 2013 issuances, respectively, which we subsequently invested in an equal number of the Partnership's i-units.
	The following table presents our issuances of additional Listed Shares in 2013. There were no share issuances in 2012 or 2014.
															Ownership			Ownership
			Number of			Average				Net Proceeds					Percentage in the			Percentage in the
			Listed Shares			Offering Price				to the					Partnership Prior			Partnership After
	Issuance Date		Issued			per share				Partnership (1)					to the Issuance			the Issuance
	(in millions, except shares and per share amount)
	2013
	September 24			424,686			$	28.02			$	11.9			18.8	%		18.9	%
	September 13			8,000,000			$	28.02			$	223.7			16.8	%		18.8	%
	March 1			10,350,000			$	26.44			$	272.9			13.5	%		16.3	%
		Total		18,774,686							$	508.5
	(1)
	Net of underwriters' fees and discounts, commissions and issuance expenses, if any.
	Partnership Equity Restructuring
	Prior to July 1, 2014, the General Partner received incremental incentive cash distributions related to its incentive distribution rights, or Previous IDRs, on the portion of cash distributions that exceeded certain target thresholds on a per unit basis under the Partnership's limited partnership agreement, or Partnership Agreement. The incentive distributions payable to the General Partner were 13%, 23% and 48% of all quarterly distributions of available cash that exceeded target levels of $0.295, $0.35 and $0.495 per limited partner unit, respectively. The net income attributed to the Previous IDRs was equivalent to the amount of the incentive cash distributions.
	Effective July 1, 2014, the General Partner entered into an equity restructuring transaction, or Equity Restructuring, with the Partnership in which the General Partner irrevocably waived its right to receive cash distributions and allocations of items of income, gain, deduction and loss in excess of 2% in respect of its general partner interest in the Previous IDRs, in exchange for the issuance to a wholly-owned subsidiary of the General Partner of a new class of limited partner interests designated as Class D units, and a new class of limited partner interests designated as IDUs.
	The IDUs entitle the holder thereof to receive 23% of the incremental cash distributions paid by the Partnership in excess of $0.5435 per unit per quarter on its Class A and Class B common units, collectively, the common units, the i-units we own and the Class D units. In the event of any decrease in the Class A common unit distribution below the current quarterly distribution level of $0.5435 per unit in any quarter during the five years commencing with the fourth quarter of 2014, the distribution paid by the Partnership on the Class D units will be reduced to the amount that would have been paid by the Partnership in respect of the Previous IDRs had the Equity Restructuring not occurred. In addition, the third quarter 2014 distribution on the Class D units was reduced to prevent the aggregate distributions paid by the Partnership in calendar year 2014 with respect to the Previous IDRs, the Class D units and the IDUs from exceeding the distribution that would have been paid by the Partnership in calendar year 2014 in respect of the Previous IDRs had the Equity Restructuring not occurred.
	As a result of the Equity Restructuring and the associated creation of the Class D units and IDUs, a reallocation in the carrying values of the Partnership's capital accounts was required. The Class D units and IUDs were recorded at fair value, and the remaining balance in the Partnership's capital accounts was allocated to the General Partner, the common units, and i-units on a pro-rata basis.  In addition, the reallocation among the Partnership's capital accounts resulted in a negative capital account balance for the Partnership's Class B common units. The Partnership Agreement does not allow for the capital accounts of any limited partner to be negative and, as a result, requires the General Partner and those limited partners with positive capital account balances that participate in earnings of the Partnership based on their ownership interest to allocate income to the capital account of the Class B common units on a pro rata basis to bring the balance to zero. For the year ended December 31, 2014, our pro-rata share of this allocation to the Class B common units was $1.5 million.
	The reallocation from these noncash transactions reduced the book basis of our investment in the Partnership, based on our proportionate ownership interest in the Partnership at the time of the transaction, by $375.4 million, net of a $222.7 million tax benefit. A corresponding reduction to our Shareholders' equity was recorded and is reflected under “Capital account adjustments” on our statements of shareholders' equity.
	MEP Drop Down Transaction
	On July 1, 2014, the Partnership sold a 12.6% limited partner interest in Midcoast Operating, L.P., or Midcoast Operating, to MEP for $350.0 million in cash, which reduced its total ownership interest in Midcoast Operating from 61% to 48.4%. The difference between the fair value and the carrying value of the interest in Midcoast Operating was recorded as an adjustment to the Partnership's capital accounts. This noncash adjustment resulted in a reduction of $15.5 million, net of a $9.3 million tax benefit, to the book basis of our investment in the Partnership, based on our proportionate ownership interest in the Partnership at the time of the transaction, with a corresponding reduction to “Capital account adjustments” on our statements of shareholders' equity.
	Partnership Preferred Unit Issuance
	On May 7, 2013, the Partnership sold to the General Partner 48,000,000 Preferred Units, representing limited partner interests in the Partnership for proceeds of approximately $1.2 billion. These Preferred Units are entitled to annual cash distributions, payable quarterly; however, during the first full eight quarters ending June 30, 2015, the cash distributions will accrue and accumulate and will be payable upon the earlier of the fifth anniversary of the issuance of Preferred Units or redemption of such Preferred Units by the Partnership. On or after June 1, 2016, at the sole option of the holder of the Preferred Units, the Preferred Units may be converted into the Partnership's Class A common units.
	At the time of issuance, the Preferred Units were issued at a discount to the market price of the Class A common units into which they are convertible. This discount represents a beneficial conversion feature, which is distributed ratably from the issuance date through the first available conversion date. The discount and cash distributions to the holder of the Preferred Units results in an increase in the Partnership's preferred capital and a decrease to our i-unit investment ownership in the Partnership through its impact to our “Equity income (loss) from investment in Enbridge Energy Partners, L.P.” on our statements of income. Quarterly cash distributions to the holder of the Preferred Units, whether accrued or paid, will reduce the amount of distributable available cash available to the Partnership's holders of general and limited partner units, including i-units.
	The following table presents the issuances of additional Class A common units by the Partnership for the year presented:
			Number of			Average									Ownership				Ownership			Increases in
			Class A			Offering Price			Net Proceeds						Percentage in the				Percentage in the			the Book
			Common units			per Class A			to the						Partnership Prior				Partnership After			Value of
	Issuance Date		Issued			common unit			Partnership (1)						to the Issuance				the Issuance			Investment (2)
	(in millions, except units and per unit amount)
	2012
	September			16,100,000		$	28.64				$	446.8				13.9	%			13.1	%		$	22.6
	(1)
	Net of underwriters' fees and discounts, commissions and issuance expenses and including contributions from the General Partner to maintain its 2% general partner interest in the Partnership.
(2)
Before the effect of income taxes.
During the year ended December 31, 2012, we recorded $22.7 million of “capital account adjustments” with respect to all the Partnership's Class A common unit issuances. The after-tax effect of this capital account adjustment to our Shareholders' equity at December 31, 2012 was $14.4 million.

RELATED_PARTY_TRANSACTIONS

RELATED PARTY TRANSACTIONS	12 Months Ended
	Dec. 31, 2014
RELATED PARTY TRANSACTIONS [Abstract]
RELATED PARTY TRANSACTIONS	4.  RELATED PARTY TRANSACTIONS
	We are a limited partner in the Partnership and, pursuant to a delegation of control agreement among us, the General Partner and the Partnership, assumed the management of the Partnership's business and affairs. Pursuant to this agreement, we have assumed substantially all of the General Partner's power and authority to manage the business and affairs of the Partnership and its subsidiaries. The delegation of control agreement provides that we will not amend or propose to amend the Partnership's partnership agreement, allow a merger or consolidation involving the Partnership, allow a sale or exchange of all or substantially all of the assets of the Partnership or dissolve or liquidate the Partnership without the approval of the General Partner.
	The General Partner remains responsible to the Partnership for actions taken or omitted by us while serving as the delegate of the General Partner as if the General Partner had itself taken or omitted to take such actions. The General Partner owns all of our voting shares. The General Partner has agreed not to voluntarily withdraw as general partner of the Partnership and has agreed not to transfer its interest as general partner of the Partnership unless the transferee agrees in writing to be bound by the terms and conditions of the delegation of control agreement that apply to the General Partner.
	The Partnership recognizes the delegation of rights and powers to us and indemnifies and protects us and our officers and directors to the same extent as it does with respect to the General Partner. In addition, the Partnership reimburses our expenses to the same extent as it does with respect to the General Partner as general partner. The Partnership also reimburses us for any Texas franchise taxes and any other similar capital-based foreign, state and local taxes not otherwise paid or reimbursed by Enbridge pursuant to the tax indemnification agreement.
	The General Partner, we and Enbridge, through its affiliates, provide the Partnership with managerial, administrative, operational and director services pursuant to service agreements among all of us. Pursuant to these service agreements, the Partnership reimburses us, the General Partner and affiliates of Enbridge for the costs of these managerial, administrative, operational and director services. Through an operational services agreement among Enbridge, affiliates of Enbridge and the Partnership, the Partnership is charged for the services of our executive management resident in Canada. Through a general and administrative services agreement among the Partnership, the General Partner, us and Enbridge Employee Services, Inc., a subsidiary of the General Partner, which we refer to as EES, the Partnership is charged for the services of our executive management resident in the United States. In addition, other employees of EES are assigned to work for the General Partner, the Partnership and us, and employer expenses for these employees are charged by EES to each of us, as appropriate. For the periods ended December 31, 2014, 2013 and 2012, all costs from EES incurred by us were charged to the Partnership pursuant to these agreements.

INCOME_TAXES

INCOME TAXES	12 Months Ended
	Dec. 31, 2014
INCOME TAXES [Abstract]
INCOME TAXES	5.  INCOME TAXES
	Our long-term deferred income tax asset of $73.7 million at December 31, 2014 and liability of $150.8 million at December 31, 2013, results from the deferred income tax expense associated with recording our equity in earnings of the Partnership, our share of the other comprehensive income of the Partnership and the impact of any equity restructuring of the Partnership. The terms of the i-units provide that the units owned by us will not be allocated income, gain, loss or deductions of the Partnership for tax purposes until such time that we dispose of our investment in the Partnership, thus resulting in the realization of the long-term deferred income tax asset or liability, respectively. Due to the Equity Restructuring and the Partnership's sale of Midcoast Operating to MEP, we recorded a $232.0 million deferred federal tax benefit which resulted in a net deferred tax asset of $73.7 million. We believe that the deferred tax asset will be realized through deferred tax expense on future equity earnings we receive from the Partnership. Additionally, as of December 31, 2014 and 2013, we had no liability reported for unrecognized tax benefits.
	The effective income tax rates we used in computing the income tax provisions for the years ended December 31, 2014, 2013 and 2012 are presented in the following table. There were no cash payments for income taxes during the years ended December 31, 2014, 2013 and 2012.
							2012
			2014		2013
		Federal statutory income tax rate	35	%	35	%	35	%
		State income tax rate	2.9	%	(4.0	)%	2	%
		Effective income tax rate	37.9	%	31	%	37	%
	For the year ended December 31, 2013, the effective state income tax rate is negative due to an increase in the effective state income tax rate.  The increase in the effective state income tax rate increased state income tax expense.  This increased tax rate when applied to our temporary differences (differences between financial reporting and tax basis or our assets/liabilities) caused us to record state tax expense for the current period rather than the tax recovery that would be expected because of the pre-tax book loss we recorded for the current period.  When tax expense is compared to our pre-tax book loss, this causes us to have a negative state income tax rate.
	Our tax years are generally open to examination by the Internal Revenue Service and state revenue authorities for the calendar years ended 2013, 2012 and 2011.

SUMMARIZED_FINANCIAL_INFORMATI

SUMMARIZED FINANCIAL INFORMATION FOR THE PARTNERSHIP	12 Months Ended
	Dec. 31, 2014
SUMMARIZED FINANCIAL INFORMATION FOR THE PARTNERSHIP [Abstract]
SUMMARIZED FINANCIAL INFORMATION FOR THE PARTNERSHIP	6.  SUMMARIZED FINANCIAL INFORMATION FOR THE PARTNERSHIP
	The Partnership is a publicly-traded Delaware limited partnership that owns and operates crude oil and liquid petroleum transportation and storage assets and natural gas gathering, treating, processing, transportation and marketing assets in the United States of America. The following table provides summarized financial information of the Partnership:
		For the years ended December 31,
		2014		2013			2012
		(in millions)
	Operating revenue	$	7,964.70	$	7,117.10		$	6,706.10
	Operating expenses		6,878.00		6,676.70			5,812.90
	Operating income	$	1,086.70	$	440.4		$	893.2
	Net income	$	740	$	160.4		$	550.1
	Less: Net income attributable to:
	Noncontrolling interest		263.3		88.3			57
	Series 1 preferred unit distributions(1)		90		58.2			-
	Accretion of discount on Series 1 preferred units(1)		14.9		9.2			-
	Net income attributable to Enbridge Energy Partners, L.P.	$	371.8	$	4.7		$	493.1
	Less: Net income attributable to the General Partner		153.4		127.4			123.9
	Net income (loss) attributable to limited partners(2)	$	218.4	$	(122.7	)	$	369.2
	Current assets	$	955.4	$	676.8		$	1,087.90
	Long-term assets	$	16,791.50	$	14,224.70		$	11,708.90
	Current liabilities	$	1,915.90	$	1,993.40		$	1,634.00
	Long-term liabilities	$	7,101.60	$	5,210.70		$	5,914.90
	Noncontrolling interest	$	3,609.00	$	1,975.60		$	793.5
	Partners' capital	$	8,729.40	$	7,697.40		$	5,247.90
	(1)
	On May 7, 2013, Enbridge Energy Partners, L.P. entered into the Series 1 Preferred Unit Purchase Agreement with its General Partner and filed a Form 8-K on May 13, 2013 detailing the terms and properties of the new category of stock units.
	(2)
	The Partnership allocates its net income among the Preferred Units, the General Partner and limited partners first using preferred unit distributions and then the two-class method in accordance with applicable authoritative accounting guidance. Under the two-class method, the Partnership allocates its net income, after noncontrolling interest and preferred unit distributions, including any incentive distribution rights embedded in the general partner interest, to the General Partner and its limited partners, including us, according to the distribution formula for available cash as set forth in its partnership agreement.

RECENT_ACCOUNTING_PRONOUNCEMEN

RECENT ACCOUNTING PRONOUNCEMENTS NOT YET ADOPTED	12 Months Ended
	Dec. 31, 2014
RECENT ACCOUNTING PRONOUNCEMENTS NOT YET ADOPTED [Abstract]
RECENT ACCOUNTING PRONOUNCEMENTS NOT YET ADOPTED	7. RECENT ACCOUNTING PRONOUNCEMENTS NOT YET ADOPTED
	Discontinued Operations
	In April 2014, the Financial Accounting Standards Board, or FASB, issued Accounting Standards Update No. 2014-08 that changes the criteria and requires expanded disclosures for reporting discontinued operations. This accounting update is effective for annual and interim periods beginning after December 15, 2014, and is to be applied prospectively. We do not expect that the adoption of this pronouncement will have a material impact on our consolidated financial statements.
	Revenues from Contracts with Customers
	In May 2014, the FASB issued Accounting Standards Update No. 2014-09 that outlines a single comprehensive model for entities to use in accounting for revenue arising from contracts with customers and supersedes most current revenue recognition guidance, including industry-specific guidance. This accounting update is effective for annual and interim periods beginning on or after December 15, 2016 and may be applied on either a full or modified retrospective basis. We are currently evaluating which transition approach the Partnership will apply and the impact that this pronouncement will have on the Partnership's consolidated financial statements and our financial statements.
	Going Concern Uncertainties
	In August 2014, the FASB issued Accounting Standards Update No. 2014-15 which provides guidance on determining when and how to disclose going-concern uncertainties in the financial statements. The new standard requires management to perform interim and annual assessments of an entity's ability to continue as a going concern within one year of the date the financial statements are issued. An entity must provide certain disclosures if conditions or events raise substantial doubt about the entity's ability to continue as a going concern. This accounting update is effective for annual and interim periods beginning on or after December 15, 2016, with early adoption permitted. We do not expect that the adoption of this pronouncement will have a material impact on our consolidated financial statements.

SUPPLEMENTAL_SELECTED_QUARTERL

SUPPLEMENTAL SELECTED QUARTERLY FINANCIAL INFORMATION (UNAUDITED)	12 Months Ended
	Dec. 31, 2014
SUPPLEMENTAL SELECTED QUARTERLY FINANCIAL INFORMATION (UNAUDITED) [Abstract]
SUPPLEMENTAL SELECTED QUARTERLY FINANCIAL INFORMATION (UNAUDITED)	8. SUPPLEMENTAL SELECTED QUARTERLY FINANCIAL INFORMATION (UNAUDITED)
		First			Second		Third			Fourth			Total
		(dollars in millions, except per share amounts)
	2014 Quarters
	Net Income (loss)	$	7.2		$	1.1	$	(4.2	)	$	23		$	27.1
	Net Income (loss) per share, (basic and diluted)	$	0.11		$	0.02	$	(0.06	)	$	0.34		$	0.41
	2013 Quarters
	Net Income	$	(13.8	)	$	5.9	$	(3.1	)	$	(7.1	)	$	(18.1	)
	Net Income (loss) per share, (basic and diluted)	$	(0.31	)	$	0.11	$	(0.06	)	$	(0.11	)	$	(0.33	)

SUBSEQUENT_EVENTS

SUBSEQUENT EVENTS	12 Months Ended
	Dec. 31, 2014
SUBSEQUENT EVENTS [Abstract]
SUBSEQUENT EVENTS	9. SUBSEQUENT EVENTS
	Alberta Clipper Drop Down to the Partnership
	On January 2, 2015, the Partnership closed a transaction, or the Drop Down, pursuant to which they acquired the remaining 66.7% interest in the U.S. segment of the Alberta Clipper Pipeline from its General Partner. The consideration consisted of approximately 18,114,975 units of a new class of limited partner interests designated as Class E units with an aggregate value of $694.0 million issued to its General Partner.
	The Class E units are entitled to the same distributions as the Partnership's Class A common units held by the public and are convertible into Class A common units on a one-for-one basis at its General Partner's option. The Class E units were not entitled to distributions with respect to the quarter ended December 31, 2014. The Class E units are redeemable at our option after 30 years, if not earlier converted by its General Partner. The Class E units have a liquidation preference equal to their notional value at December 23, 2014 of $38.31 per unit, which was determined based on the trailing five-day volume-weighted average price of the Partnership's Class A common units as of that date, which was the date on which the Partnership and its General Partner entered into a contribution agreement setting forth the terms of the Drop Down. The Class E units were issued in a private transaction exempt from registration under the Securities Act of 1933, as amended.
	Share Distribution
	On January 29, 2015, our board of directors declared a share distribution payable on February 13, 2015, to shareholders of record as of February 6, 2015, based on the $0.57 per limited partner unit distribution declared by the Partnership. The Partnership's distribution increased the number of i-units that we own.  The number of i-units we received from the Partnership on February 13, 2015 was 1,038,375.  The amount of this increase is calculated by dividing $0.57, the cash amount distributed by the Partnership per common unit by $37.50, the average closing price of one of our Listed Shares on the NYSE for the 10 trading day period immediately preceding the ex-dividend date for our shares, multiplied by 68,305,187, the number of shares outstanding on the record date. We distributed an additional 917,024 Listed Shares to our Listed shareholders and 121,351 shares to the General Partner in respect of these additional i-units.

SUMMARY_OF_SIGNIFICANT_ACCOUNT1

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	12 Months Ended
	Dec. 31, 2014
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES [Abstract]
Accounting for Investment in the Partnership	Accounting for Investment in the Partnership
	We use the equity method of accounting for our ownership in the Partnership because we exercise significant influence over the Partnership pursuant to a delegation of control agreement among the General Partner, the Partnership and us. Our share of earnings of the Partnership is recorded in the period in which it is earned after the Partnership's net income is adjusted for preferred distributions and then using the two-class method. As of December 31, 2014 and 2013, we owned approximately 15.2% and 16.9%, respectively, of the Partnership. Our ownership percentage changes as the Partnership issues additional limited partner units. Changes in the calculation of our ownership percentage affect our net income and comprehensive income.
	The distributable amount of the Class D Units and IDUs are divided among the Partnership's limited partners: (1) Class A common units, (2) Class B common units and (3) i-units based on our ownership interest in the Partnership. Thus, our “Equity income (loss) from investment in Enbridge Energy Partners, L.P.” on our statements of income also includes a pro-rata share of these costs every quarter.
	Furthermore, our “Equity income (loss) from investment in Enbridge Energy Partners, L.P.” on our statements of income is adjusted for any reallocation of the Partnership's capital accounts needed to bring a negative balance in any Partnership's class of capital accounts back to zero.
Capital Account Adjustments	Capital Account Adjustments
	The Partnership records an adjustment to the carrying value of its book capital accounts when it issues additional common units and the new issuance price per unit is greater than or less than the average cost per unit for each class of units. The Partnership also records an adjustment to the carrying value of its book capital accounts when it restructures its equity and any time that EEP drops down additional ownership in Midcoast Operating Limited Partners, or MOLP, to Midcoast Energy Partners, L.P., or MEP. We refer to these adjustments as capital account adjustments. We recognize any capital account adjustments recorded by the Partnership to the book capital account it maintains for our i-units by increasing or decreasing our investment in the Partnership and recording a corresponding capital account adjustment directly to “Shareholders' equity” on our statements of financial position.
Net Income Per Share	Net Income Per Share
	Both basic and diluted earnings per share are computed based on the weighted-average number of our shares outstanding during each period. We have no securities outstanding that may be converted into or exercised for our shares.
Income Taxes	Income Taxes
	We are a limited liability company that has elected to be treated as a corporation for U. S. federal income tax purposes. We recognize deferred income tax assets and liabilities for temporary differences between the basis of our assets and liabilities for financial reporting and tax purposes. Changes in tax legislation are included in the relevant computations in the period in which the legislation is enacted. Temporary differences and associated deferred tax expense and deferred tax liabilities result from recording our equity in the earnings of the Partnership, which will not become taxable until the Partnership is liquidated or the i-units are otherwise monetized, in addition to capital account adjustments.
	We are a party to a tax indemnification agreement with Enbridge. Pursuant to this tax indemnification agreement, Enbridge agrees to indemnify us from any tax liability attributable to our formation or our management of the business and affairs of the Partnership and from any taxes arising out of a transaction involving the i-units owned, to the extent the transaction does not generate cash sufficient to pay our taxes with respect to such transaction, in each case, other than any Texas franchise taxes and other capital-based foreign, state or local taxes that are required to be paid or reimbursed by the Partnership under the delegation of control agreement.
	The delegation of control agreement states that the General Partner bears the economic impact for our taxes only in the event we do not have cash sufficient to pay them. As a result, we accrue state income taxes in addition to federal income tax.
Comprehensive Income	Comprehensive Income
	Comprehensive income differs from net income due to the equity in other comprehensive income or loss of the Partnership. The Partnership enters into a variety of derivative financial instruments to mitigate its exposure to commodity price and interest rate risk, most of which are qualified cash flow hedges under the applicable authoritative accounting guidance for derivative activities. As such, changes in the fair market value of the Partnership's derivative financial instruments produce fluctuations in our comprehensive income, which is reflected as equity in other comprehensive income or loss of the Partnership.

SHAREHOLDERS_EQUITY_Tables

SHAREHOLDERS' EQUITY (Tables)	12 Months Ended
	Dec. 31, 2014
SHAREHOLDERS' EQUITY [Abstract]
Schedule of Share Distribution							Distribution			Average						Listed			Shares
							per Unit			Closing			Additional			Shares			distributed
	Distribution				Distribution		of the			Price of the			i-units			distributed			to General
	Declaration Date		Record Date		Payment Date		Partnership			Listed Shares			owned			to Public			Partner
	2014
		31-Oct	7-Nov		14-Nov		$	0.555		$	35.75			1,044,292			922,250			122,042
		31-Jul	7-Aug		14-Aug		$	0.555		$	34.53			1,064,113			939,754			124,359
		30-Apr	8-May		15-May		$	0.5435		$	29.14			1,212,031			1,070,385			141,646
		30-Jan	7-Feb		14-Feb		$	0.5435		$	27.9			1,241,652			1,096,544			145,108
														4,562,088			4,028,933			533,155
	2013
		October 31	7-Nov		14-Nov		$	0.5435		$	29.25			1,162,989			1,027,074			135,915
		July 29	7-Aug		14-Aug		$	0.5435		$	31.85			908,499			785,809			122,690
		April 30	8-May		15-May		$	0.5435		$	29.5			963,274			833,187			130,087
		30-Jan	7-Feb		14-Feb		$	0.5435		$	30.45			735,227			611,430			123,797
														3,769,989			3,257,500			512,489
	2012
		October 31	7-Nov		14-Nov		$	0.5435		$	31.65			695,596			578,472			117,124
		July 30	7-Aug		14-Aug		$	0.5435		$	31.43			688,548			572,611			115,937
		April 30	7-May		15-May		$	0.5325		$	32.28			646,118			537,325			108,793
		30-Jan	7-Feb		14-Feb		$	0.5325		$	34.12			601,828			500,493			101,335
														2,632,090			2,188,901			443,189
Schedule of Additional Listed Shares Issued															Ownership			Ownership
			Number of			Average				Net Proceeds					Percentage in the			Percentage in the
			Listed Shares			Offering Price				to the					Partnership Prior			Partnership After
	Issuance Date		Issued			per share				Partnership (1)					to the Issuance			the Issuance
	(in millions, except shares and per share amount)
	2013
	September 24			424,686			$	28.02			$	11.9			18.8	%		18.9	%
	September 13			8,000,000			$	28.02			$	223.7			16.8	%		18.8	%
	March 1			10,350,000			$	26.44			$	272.9			13.5	%		16.3	%
		Total		18,774,686							$	508.5
	(1)
	Net of underwriters' fees and discounts, commissions and issuance expenses, if any.
Schedule of Additional Class A Common Units Issued			Number of			Average									Ownership				Ownership			Increases in
			Class A			Offering Price			Net Proceeds						Percentage in the				Percentage in the			the Book
			Common units			per Class A			to the						Partnership Prior				Partnership After			Value of
	Issuance Date		Issued			common unit			Partnership (1)						to the Issuance				the Issuance			Investment (2)
	(in millions, except units and per unit amount)
	2012
	September			16,100,000		$	28.64				$	446.8				13.9	%			13.1	%		$	22.6
	(1)
	Net of underwriters' fees and discounts, commissions and issuance expenses and including contributions from the General Partner to maintain its 2% general partner interest in the Partnership.
	(2)
	Before the effect of income taxes.

INCOME_TAXES_Tables

INCOME TAXES (Tables)	12 Months Ended
	Dec. 31, 2014
INCOME TAXES [Abstract]
Schedule of Effective Income Tax Rate Reconciliation							2012
			2014		2013
		Federal statutory income tax rate	35	%	35	%	35	%
		State income tax rate	2.9	%	(4.0	)%	2	%
		Effective income tax rate	37.9	%	31	%	37	%

SUMMARIZED_FINANCIAL_INFORMATI1

SUMMARIZED FINANCIAL INFORMATION FOR THE PARTNERSHIP (Tables)	12 Months Ended
	Dec. 31, 2014
SUMMARIZED FINANCIAL INFORMATION FOR THE PARTNERSHIP [Abstract]
Schedule of Summarized Financial Information for the Partnership		For the years ended December 31,
		2014		2013			2012
		(in millions)
	Operating revenue	$	7,964.70	$	7,117.10		$	6,706.10
	Operating expenses		6,878.00		6,676.70			5,812.90
	Operating income	$	1,086.70	$	440.4		$	893.2
	Net income	$	740	$	160.4		$	550.1
	Less: Net income attributable to:
	Noncontrolling interest		263.3		88.3			57
	Series 1 preferred unit distributions(1)		90		58.2			-
	Accretion of discount on Series 1 preferred units(1)		14.9		9.2			-
	Net income attributable to Enbridge Energy Partners, L.P.	$	371.8	$	4.7		$	493.1
	Less: Net income attributable to the General Partner		153.4		127.4			123.9
	Net income (loss) attributable to limited partners(2)	$	218.4	$	(122.7	)	$	369.2
	Current assets	$	955.4	$	676.8		$	1,087.90
	Long-term assets	$	16,791.50	$	14,224.70		$	11,708.90
	Current liabilities	$	1,915.90	$	1,993.40		$	1,634.00
	Long-term liabilities	$	7,101.60	$	5,210.70		$	5,914.90
	Noncontrolling interest	$	3,609.00	$	1,975.60		$	793.5
	Partners' capital	$	8,729.40	$	7,697.40		$	5,247.90
	(1)
	On May 7, 2013, Enbridge Energy Partners, L.P. entered into the Series 1 Preferred Unit Purchase Agreement with its General Partner and filed a Form 8-K on May 13, 2013 detailing the terms and properties of the new category of stock units.
	(2)
	The Partnership allocates its net income among the Preferred Units, the General Partner and limited partners first using preferred unit distributions and then the two-class method in accordance with applicable authoritative accounting guidance. Under the two-class method, the Partnership allocates its net income, after noncontrolling interest and preferred unit distributions, including any incentive distribution rights embedded in the general partner interest, to the General Partner and its limited partners, including us, according to the distribution formula for available cash as set forth in its partnership agreement.

SUPPLEMENTAL_SELECTED_QUARTERL1

SUPPLEMENTAL SELECTED QUARTERLY FINANCIAL INFORMATION (UNAUDITED) (Tables)	12 Months Ended
	Dec. 31, 2014
SUPPLEMENTAL SELECTED QUARTERLY FINANCIAL INFORMATION (UNAUDITED) [Abstract]
Schedule of Quarterly Financial Information (Unaudited)	8. SUPPLEMENTAL SELECTED QUARTERLY FINANCIAL INFORMATION (UNAUDITED)
		First			Second		Third			Fourth			Total
		(dollars in millions, except per share amounts)
	2014 Quarters
	Net Income (loss)	$	7.2		$	1.1	$	(4.2	)	$	23		$	27.1
	Net Income (loss) per share, (basic and diluted)	$	0.11		$	0.02	$	(0.06	)	$	0.34		$	0.41
	2013 Quarters
	Net Income	$	(13.8	)	$	5.9	$	(3.1	)	$	(7.1	)	$	(18.1	)
	Net Income (loss) per share, (basic and diluted)	$	(0.31	)	$	0.11	$	(0.06	)	$	(0.11	)	$	(0.33	)

GENERAL_Details

GENERAL (Details)	12 Months Ended
	Dec. 31, 2014
	classes
Number of new classes of limited partner interests issued	2
General Partner [Member]
Voting shares, outstanding	5.15
Outstanding (in shares)	7,982,581
Ownership percentage of voting shares outstanding	100.00%
Ownership percentage of listed shares outstanding	11.70%
Publicly Owned [Member]
Outstanding (in shares)	60,322,601
Ownership percentage of listed shares outstanding	88.30%

SUMMARY_OF_SIGNIFICANT_ACCOUNT2

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) (Enbridge Energy Partners LP [Member])	Dec. 31, 2014	Dec. 31, 2013
Enbridge Energy Partners LP [Member]
Schedule of Equity Method Investments [Line Items]
Percentage of ownership in Partnership	15.20%	16.90%

SHAREHOLDERS_EQUITY_Narrative_

SHAREHOLDERS' EQUITY (Narrative) (Details) (USD $)	12 Months Ended		6 Months Ended
In Millions, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2012	Dec. 31, 2014	Jun. 30, 2014
Subsidiary or Equity Method Investee [Line Items]
Number of trading days	10 days
Capital account adjustments, net of tax		$14.40
Pro-rata share of allocation to Class B common units	1.5
Capital account adjustments, pretax		22.7
Capital account adjustments, tax benefit	-232
Percentage of interest waived to receive distributions	2.00%
First Target Distribution [Member]
Subsidiary or Equity Method Investee [Line Items]
Minimum portion of quarterly distribution per unit			$0.54	$0.30
Percentage of incremental distributions			23.00%	13.00%
Second Target Distribution [Member]
Subsidiary or Equity Method Investee [Line Items]
Minimum portion of quarterly distribution per unit				$0.35
Percentage of incremental distributions				23.00%
Over Second Target Distribution [Member]
Subsidiary or Equity Method Investee [Line Items]
Minimum portion of quarterly distribution per unit				$0.50
Percentage of incremental distributions				48.00%
Enbridge Energy Partners LP [Member]
Subsidiary or Equity Method Investee [Line Items]
Capital account adjustments, net of tax	375.4
Capital account adjustments, tax benefit	-222.7
Midcoast Operating LP [Member]
Subsidiary or Equity Method Investee [Line Items]
Capital account adjustments, net of tax	15.5
Additional interest sold (as a percent)	12.60%
Cash received from sale of interest	350
Ownership interest (as a percent)			48.40%	61.00%
Capital account adjustments, tax benefit	($9.30)

SHAREHOLDERS_EQUITY_Schedule_o

SHAREHOLDERS' EQUITY (Schedule of Share Distributions) (Details) (USD $)

12 Months Ended

0 Months Ended

1 Months Ended

0 Months Ended

In Millions, except Share data, unless otherwise specified

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2012

Feb. 14, 2014

Feb. 14, 2013

Feb. 14, 2012

15-May-14

15-May-13

15-May-12

Aug. 14, 2014

Aug. 14, 2013

Aug. 14, 2012

Nov. 14, 2014

Nov. 14, 2013

Nov. 14, 2012

Distribution Made to Limited Liability Company (LLC) Member [Line Items]

Additional i-units owned

4,562,088

3,769,989

2,632,090

Non-cash financing activities

$144

$113.80

$85

Public [Member]

Distribution Made to Limited Liability Company (LLC) Member [Line Items]

Additional i-units owned

4,028,933

3,257,500

2,188,901

General Partner of Enbridge Energy Partners LP [Member]

Distribution Made to Limited Liability Company (LLC) Member [Line Items]

Additional i-units owned

533,155

512,489

443,189

First Quarter Distribution [Member]

Distribution Made to Limited Liability Company (LLC) Member [Line Items]

Distribution Declaration Date

30-Jan-14

30-Jan-13

30-Jan-12

Record Date

7-Feb-14

7-Feb-13

7-Feb-12

Distribution Payment Date

14-Feb-14

14-Feb-13

14-Feb-12

Distribution per Unit of the Partnership

$0.54

$0.54

$0.53

Additional i-units owned

1,241,652

735,227

601,828

First Quarter Distribution [Member] | Public [Member]

Distribution Made to Limited Liability Company (LLC) Member [Line Items]

Additional i-units owned

1,096,544

611,430

500,493

First Quarter Distribution [Member] | General Partner of Enbridge Energy Partners LP [Member]

Distribution Made to Limited Liability Company (LLC) Member [Line Items]

Additional i-units owned

145,108

123,797

101,335

First Quarter Distribution [Member] | Weighted Average [Member]

Distribution Made to Limited Liability Company (LLC) Member [Line Items]

Closing Price of the Listed Shares

$27.90

$30.45

$34.12

Second Quarter Distribution [Member]

Distribution Made to Limited Liability Company (LLC) Member [Line Items]

Distribution Declaration Date

30-Apr-14

30-Apr-13

30-Apr-12

Record Date

8-May-14

8-May-13

7-May-12

Distribution Payment Date

15-May-14

15-May-13

15-May-12

Distribution per Unit of the Partnership

$0.54

$0.54

$0.53

Additional i-units owned

1,212,031

963,274

646,118

Second Quarter Distribution [Member] | Public [Member]

Distribution Made to Limited Liability Company (LLC) Member [Line Items]

Additional i-units owned

1,070,385

833,187

537,325

Second Quarter Distribution [Member] | General Partner of Enbridge Energy Partners LP [Member]

Distribution Made to Limited Liability Company (LLC) Member [Line Items]

Additional i-units owned

141,646

130,087

108,793

Second Quarter Distribution [Member] | Weighted Average [Member]

Distribution Made to Limited Liability Company (LLC) Member [Line Items]

Closing Price of the Listed Shares

$29.14

$29.50

$32.28

Third Quarter Distribution [Member]

Distribution Made to Limited Liability Company (LLC) Member [Line Items]

Distribution Declaration Date

31-Jul-14

29-Jul-13

30-Jul-12

Record Date

7-Aug-14

7-Aug-13

7-Aug-12

Distribution Payment Date

14-Aug-14

14-Aug-13

14-Aug-12

Distribution per Unit of the Partnership

$0.56

$0.54

$0.54

Additional i-units owned

1,064,113

908,499

688,548

Third Quarter Distribution [Member] | Public [Member]

Distribution Made to Limited Liability Company (LLC) Member [Line Items]

Additional i-units owned

939,754

785,809

572,611

Third Quarter Distribution [Member] | General Partner of Enbridge Energy Partners LP [Member]

Distribution Made to Limited Liability Company (LLC) Member [Line Items]

Additional i-units owned

124,359

122,690

115,937

Third Quarter Distribution [Member] | Weighted Average [Member]

Distribution Made to Limited Liability Company (LLC) Member [Line Items]

Closing Price of the Listed Shares

$34.53

$31.85

$31.43

Fourth Quarter Distribution [Member]

Distribution Made to Limited Liability Company (LLC) Member [Line Items]

Distribution Declaration Date

31-Oct-14

31-Oct-13

31-Oct-12

Record Date

7-Nov-14

7-Nov-13

7-Nov-12

Distribution Payment Date

14-Nov-14

14-Nov-13

14-Nov-12

Distribution per Unit of the Partnership

$0.56

$0.54

$0.54

Additional i-units owned

1,044,292

1,162,989

695,596

Fourth Quarter Distribution [Member] | Public [Member]

Distribution Made to Limited Liability Company (LLC) Member [Line Items]

Additional i-units owned

922,250

1,027,074

578,472

Fourth Quarter Distribution [Member] | General Partner of Enbridge Energy Partners LP [Member]

Distribution Made to Limited Liability Company (LLC) Member [Line Items]

Additional i-units owned

122,042

135,915

117,124

Fourth Quarter Distribution [Member] | Weighted Average [Member]

Distribution Made to Limited Liability Company (LLC) Member [Line Items]

Closing Price of the Listed Shares

$35.75

$29.25

$31.65

Recovered_Sheet1

SHAREHOLDERS' EQUITY (Schedule Of Listed Share Issuance) (Details) (USD $)	1 Months Ended	12 Months Ended	0 Months Ended						12 Months Ended
In Millions, except Share data, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012	Sep. 24, 2013		Sep. 13, 2013		Mar. 01, 2013		Dec. 31, 2014	Dec. 31, 2013
Number of Listed Shares Issued (shares)	8,424,686
Net Proceeds to the Partnership (in USD)	$235.60
Capital account adjustments, pretax		22.7
Listed Shares [Member]
Number of Listed Shares Issued (shares)			424,686		8,000,000		10,350,000			18,774,686
Average offering price (in dollars per share)			$28.02		$28.02		$26.44
Net Proceeds to the Partnership (in USD)			$11.90	[1]	$223.70	[1]	$272.90	[1]		$508.50
Ownership in the Partnership Prior to the Issuance (as a percent)			18.80%		16.80%		13.50%
Ownership in the Partnership After the Issuance (as a percent)			18.90%		18.80%		16.30%
[1]	Net of underwriters' fees and discounts, commissions and issuance expenses, if any.

SHAREHOLDERS_EQUITY_Preferred_

SHAREHOLDERS' EQUITY (Preferred Unit Issuance) (Details) (USD $)	12 Months Ended	0 Months Ended
In Billions, except Share data, unless otherwise specified	Dec. 31, 2014	7-May-13
Preferred Units [Line Items]
Preferred Unit Optional Conversion Date	1-Jun-16
Preferred Unit Distribution Deferral Date	30-Jun-15
Preferred Unit Purchase Agreement Date	7-May-13
Preferred Stock, Convertible [Member] | Enbridge Energy Partners LP [Member]
Preferred Units [Line Items]
Preferred Units, Issued (in shares)		48,000,000
Net Proceeds to the Partnership (in USD)		$1.20

SHAREHOLDERS_EQUITY_Capital_Ac

SHAREHOLDERS' EQUITY (Capital Account Adjustments On Issuances Of Common Units By Enbridge Energy Partners LP) (Details) (USD $)	1 Months Ended	12 Months Ended			1 Months Ended
In Millions, except Share data, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Sep. 30, 2012
Number of Units Issued (in shares)	8,424,686
Net Proceeds to the Partnership			$508.50
Capital account adjustment				22.7
After-tax effect of adjustments to Shareholders' equity				14.4
Enbridge Energy Partners LP [Member]
After-tax effect of adjustments to Shareholders' equity		375.4
General partner interest		2.00%
Enbridge Energy Partners LP [Member] | SEP 2012 Equity Issuance
Number of Units Issued (in shares)					16,100,000
Average offering price (in dollars per share)					$28.64
Net Proceeds to the Partnership					446.8	[1]
Ownership in the Partnership Prior to the Issuance (as a percent)					13.90%
Ownership in the Partnership After the Issuance (as a percent)					13.10%
Capital account adjustment					$22.60	[2]
[1]	Net of underwriters' fees and discounts, commissions and issuance expenses and including contributions from the General Partner to maintain its 2% general partner interest in the Partnership.
[2]	Before the effect of income taxes.

INCOME_TAXES_Details

INCOME TAXES (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
INCOME TAXES [Abstract]
Deferred income tax liability, long-term		$150.80
Capital account adjustments, tax benefit	232
Net deferred tax asset	$73.70
Effective income tax rates we used in computing the income tax provisions:
Federal statutory income tax rate (as a percent)	35.00%	35.00%	35.00%
State income tax rate (as a percent)	2.90%	-4.00%	2.00%
Effective income tax rate (as a percent)	37.90%	31.00%	37.00%
Tax Year 2013 [Member]
Statement [Line Items]
Tax years, open to examination by the IRS	2013
Tax Year 2012 [Member]
Statement [Line Items]
Tax years, open to examination by the IRS	2012
Tax Year 2011 [Member]
Statement [Line Items]
Tax years, open to examination by the IRS	2011

SUMMARIZED_FINANCIAL_INFORMATI2

SUMMARIZED FINANCIAL INFORMATION FOR THE PARTNERSHIP (Details) (Enbridge Energy Partners LP [Member], USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Enbridge Energy Partners LP [Member]
Operating revenue	$7,964.70		$7,117.10		$6,706.10
Operating expenses	6,878		6,676.70		5,812.90
Operating income	1,086.70		440.4		893.2
Net income	740		160.4		550.1
Less: Net income attributable to noncontrolling interest	263.3		88.3		57
Less: Net income attributable to Series 1 preferred unit distributions	90	[1]	58.2	[1]		[1]
Less: Net income attributable to accretion of discount on Series 1 preferred units	14.9	[1]	9.2	[1]		[1]
Net income attributable to Enbridge Energy Partners, L.P.	371.8		4.7		493.1
Less: Net income attributable to the General Partner	153.4		127.4		123.9
Net income (loss) attributable to limited partners	218.4	[2]	-122.7	[2]	369.2	[2]
Current assets	955.4		676.8		1,087.90
Long-term assets	16,791.50		14,224.70		11,708.90
Current liabilities	1,915.90		1,993.40		1,634
Long-term liabilities	7,101.60		5,210.70		5,914.90
Noncontrolling interest	3,609		1,975.60		793.5
Partners' capital	$8,729.40		$7,697.40		$5,247.90
[1]	On May 7, 2013, Enbridge Energy Partners, L.P. entered into the Series 1 Preferred Unit Purchase Agreement with its General Partner and filed a Form 8-K on May 13, 2013 detailing the terms and properties of the new category of stock units.
[2]	The Partnership allocates its net income among the Preferred Units, the General Partner and limited partners first using preferred unit distributions and then the two-class method in accordance with applicable authoritative accounting guidance. Under the two-class method, the Partnership allocates its net income, after noncontrolling interest and preferred unit distributions, including any incentive distribution rights embedded in the general partner interest, to the General Partner and its limited partners, including us, according to the distribution formula for available cash as set forth in its partnership agreement.

SUPPLEMENTAL_SELECTED_QUARTERL2

SUPPLEMENTAL SELECTED QUARTERLY FINANCIAL INFORMATION (UNAUDITED) (Details) (USD $)	3 Months Ended								12 Months Ended
In Millions, except Per Share data, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
SUPPLEMENTAL SELECTED QUARTERLY FINANCIAL INFORMATION (UNAUDITED) [Abstract]
Net income (loss)	$23	($4.20)	$1.10	$7.20	($7.10)	($3.10)	$5.90	($13.80)	$27.10	($18.10)	$31.80
Net income (loss) per share, basic and diluted (in dollars per share)	$0.34	($0.06)	$0.02	$0.11	($0.11)	($0.06)	$0.11	($0.31)	$0.41	($0.33)	$0.80

SUBSEQUENT_EVENTS_Details

SUBSEQUENT EVENTS (Details) (USD $)	12 Months Ended			0 Months Ended
In Millions, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jan. 29, 2015	Jan. 02, 2015	Dec. 31, 2011
Subsequent Event [Line Items]
Additional i-units owned	4,562,088	3,769,989	2,632,090
Number of trading days	10 days
Listed Shares [Member]
Subsequent Event [Line Items]
Outstanding (in shares)	68,305,182	63,743,094	41,198,420			38,566,330
Voting Shares [Member]
Subsequent Event [Line Items]
Outstanding (in shares)	5.15	4.81
Subsequent Event [Member]
Subsequent Event [Line Items]
Distribution Declaration Date	29-Jan-15
Record Date	6-Feb-15
Distribution Payment Date	13-Feb-15
Additional i-units owned				1,038,375
Distribution per Unit of the Partnership (in dollars per share)				$0.57
Average closing price of shares (in dollars per share)				$37.50
Number of trading days				10 days
Subsequent Event [Member] | Listed Shares [Member]
Subsequent Event [Line Items]
Additional i-units owned				917,024
Outstanding (in shares)				68,305,187
Subsequent Event [Member] | Voting Shares [Member]
Subsequent Event [Line Items]
Additional i-units owned				121,351
Subsequent Event [Member] | Class E Units [Member] | Enbridge Energy Partners LP [Member]
Subsequent Event [Line Items]
Conversion ratio					100.00%
Redemption term					30 years
Notional value (in dollars per share)					$38.31
Subsequent Event [Member] | Alberta Clipper Pipeline [Member] | Enbridge Energy Partners LP [Member]
Subsequent Event [Line Items]
Interest acquired (as a percentage)					66.70%
Subsequent Event [Member] | Alberta Clipper Pipeline [Member] | Class E Units [Member] | Enbridge Energy Partners LP [Member]
Subsequent Event [Line Items]
Number of units transferred (in shares)					18,114,975
Value of equity transferred					$694