The percentage of additional interest acquired by the entity.

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The percentage of ownership interest in affiliate of Partnership.

+ References

No definition available.

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- Definition

Number of shares of equity interests issued or issuable to acquire entity.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
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- Definition

Percentage of voting equity interests acquired at the acquisition date in the business combination.

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Amount of equity interests of the acquirer, including instruments or interests issued or issuable in consideration for the business combination.

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- Definition

Amount of equity impact of cash distribution declared to unit-holder of limited partnership (LP).

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This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

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Amount of the cost of borrowed funds accounted for as interest expense.

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The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

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No definition available.

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Amount of cash inflow from a noncontrolling interest. Includes, but is not limited to, purchase of additional shares or other increase in noncontrolling interest ownership.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

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Reflects the sum of all other revenue and income realized from sales and other transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party during the period.

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No definition available.

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The cash outflow for the payment of a long-term borrowing made from a related party where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth. Alternate caption: Payments for Advances from Affiliates.

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RELATED PARTY TRANSACTIONS (Joint Funding Arrangement Discussions) (Details) - USD ($) $ in Millions		1 Months Ended	12 Months Ended
	Jan. 02, 2015	Oct. 27, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Jan. 27, 2017
Other revenues from transactions with related party			$ 0.7	$ 0.8	$ 0.8
Repayment of debt			0.0	306.0	12.0
Interest expense			445.5	322.0	403.2
Proceeds from noncontrolling interests			117.3	863.3	1,391.6
Equity Method Investments			$ 360.7	372.3	380.6
Alberta Clipper Pipeline [Member]
Percentage of interest acquired (in percentage)	66.70%
Repayment of debt	$ 306.0
Interest expense					24.3
Alberta Clipper Pipeline [Member] \| Class E Units [Member]
Number of units issued (in shares)	18,114,975
Value of equity transferred	$ 767.7
Eastern Access Pipeline [Member]
Noncontrolling Interest, Ownership Percentage by Parent			75.00%
Ownership interest in affiliate of Partnership (in percentage)			25.00%
Proceeds from noncontrolling interests			$ 13.8	119.3	622.5
Distribution made to limited partner, cash distributions declared				81.6
Additional Acquisition Percentages		15.00%
Equity Method Investments						$ 360.0
Pipeline Transportation and Demand Fees from Texas Express NGL System [Member]
Related party expenses			19.9	18.4	21.9
Operation Services Transactions [Member]
Related party expenses			322.7	213.0	150.9
General And Administrative Services Transactions [Member]
Related party expenses			160.1	294.0	179.0
Administration And Cleanup Efforts For Crude Oil Releases [Member]
Related party expenses			$ 0.1	0.1	0.4
US Mainline Expansion Interests [Member]
Noncontrolling Interest, Ownership Percentage by Parent			75.00%
Ownership interest in affiliate of Partnership (in percentage)			25.00%
Proceeds from noncontrolling interests			$ 90.0	673.3	$ 577.5
Distribution made to limited partner, cash distributions declared				$ 71.5