The increase in noncontrolling interest due to contributions.

No definition available.

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Amount of decrease in partners capital from sale of a portion of the parent's controlling interest.

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No definition available.

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Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

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Decrease in noncontrolling interest (for example, but not limited to, redeeming or purchasing the interests of noncontrolling shareholders, issuance of shares (interests) by the non-wholly owned subsidiary to the parent entity for other than cash, and a buyback of shares (interest) by the non-wholly owned subsidiary from the noncontrolling interests).

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Amount of Net Income (Loss) attributable to noncontrolling interest.

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The amount of the reduction or elimination during the period of a noncontrolling interest resulting from the parent's loss of control and deconsolidation of the entity in which one or more outside parties had a noncontrolling interest.

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Amount of increase in noncontrolling interest from sale of a portion of the parent's controlling interest.

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Amount after tax of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

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- Definition

Total contributions made by each class of partners (i.e., general, limited and preferred partners).

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Total distributions to each class of partners (i.e., general, limited and preferred partners).

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Total change in each class of partners' capital accounts during the year due to exchanges and conversions. Partners include general, limited and preferred partners.

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Total change in each class of partners' capital accounts during the year due to redemptions and adjustments to redemption value. All partners include general, limited and preferred partners.

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- Definition

Amount of partners' capital (deficit), including portions attributable to both the parent and noncontrolling interests. Excludes temporary equity and is sometimes called permanent equity.

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Amount of increase (decrease) in partners' capital classified as other.

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No definition available.

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The amount of accretion of the preferred stock redemption discount during the period.

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No definition available.

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Equity impact of the value of new stock issued during the period. Includes shares issued in an initial public offering or a secondary public offering.

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CONSOLIDATED STATEMENTS OF CHANGES IN PARTNERS' CAPITAL - USD ($) $ in Millions	Total	Noncontrolling Interests [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	General Partner [Member]	Class F Units [Member]	Series 1 Preferred units [Member]	Class D Unit [Member]	Class E Unit [Member]	Class A Common Units [Member]	Class B Common Unit [Member]	I Units [Member]	Incentive Distribution Unit [Member]
Beginning balance at Dec. 31, 2015		$ 3,944.5	$ (370.0)	$ 147.4		$ 1,186.8	$ 2,517.6	$ 778.2			$ 212.6	$ 495.0
Redemption of preferred units (Note 11)						0.0
Net income	$ 163.7			(47.2)	$ 0.0	45.0	77.1	21.1	$ 305.7	$ 9.1	(212.6)	10.5
Accretion of discount on preferred units	2.3					2.3
Waiver of Class D units (Note 11)				0.0			0.0					0.0
Capital contributions		63.4
Sale of noncontrolling interest in subsidiary		0.0		0.0					0.0	0.0	0.0
Other									0.0
Acquisition of noncontrolling interest in subsidiary		0.0
Issuance of Class units (Note 11)				0.0	0.0				0.0
Contributions				0.0
Sale of Midcoast assets				0.0
Net income	139.1	139.1
Distributions		(15.2)		(8.6)	0.0	(45.0)	(77.1)	(21.1)	(305.7)	(9.1)		(10.4)
Changes in fair value of derivative financial instruments reclassified to earnings			19.8
Changes in fair value of derivative financial instruments recognized in other comprehensive loss	(139.1)		(139.1)
Sale of Midcoast assets		0.0
Ending balance at Jun. 30, 2016	8,714.1	4,131.8	(489.3)	91.6	0.0	1,189.1	2,517.6	778.2	0.0	0.0	0.0	495.1
Beginning balance at Dec. 31, 2016	7,822.5	3,846.1	(339.3)	(666.8)		1,191.5	2,517.6	778.2			0.0	495.2
Redemption of preferred units (Note 11)						(1,200.0)
Net income	158.1			(9.2)	7.4	29.0	0.0	12.7	149.7	6.4	(8.9)	0.0
Accretion of discount on preferred units	8.5					8.5
Waiver of Class D units (Note 11)				2,969.0			(2,479.1)					(489.9)
Capital contributions		1,305.0
Sale of noncontrolling interest in subsidiary		411.0		0.8					28.5	0.9	8.9
Other									0.7
Acquisition of noncontrolling interest in subsidiary		(360.3)
Issuance of Class units (Note 11)				(263.0)	263.0				1,200.0
Contributions				24.5
Sale of Midcoast assets				(2,126.5)
Net income	158.9	158.9
Distributions		(219.0)		(6.9)	(3.7)	(29.0)	(38.5)	(16.9)	(267.1)	(7.3)		(5.3)
Changes in fair value of derivative financial instruments reclassified to earnings			20.7
Changes in fair value of derivative financial instruments recognized in other comprehensive loss	(20.3)		(20.3)
Sale of Midcoast assets		(296.6)
Ending balance at Jun. 30, 2017	$ 6,580.6	$ 4,845.1	$ (338.9)	$ (78.1)	$ 266.7	$ 0.0	$ 0.0	$ 774.0	$ 1,111.8	$ 0.0	$ 0.0	$ 0.0