Partners' Capital (Tables)

3 Months Ended

Mar. 31, 2018

Distribution of Preferred Unit [Table Text Block]



	Series A Preferred Unit Holder
Payment Date	Total Cash Distribution
	(in millions)
January 25, 2018 (1)	$	10

Schedule of Common Units

Activity of our common units for the three months ended March 31, 2018 is as follows:



	Number of Units
Number of common units at December 31, 2017	99,667,999
Common units repurchase	(17,286,859	)
Phantom unit vesting	110,868
Number of common units at March 31, 2018	82,492,008

Schedule of Net Income Allocation By Partners

The calculation of net income allocated to the partners is as follows (in millions, except per unit amounts):



	For the Three Months Ended March 31,
	2018			2017
Attributable to Common Units
Distributions (a)	$	68		$	82
Distributions in excess of net income	(404		)	(104		)
Limited partners' interest in net income (loss)	$	(336	)	$	(22	)

(a) Distributions declared per unit to unitholders as of record date	$	0.8255		$	0.8255

Schedule of Incentive Distribution Rights to Limited Partners

The following table illustrates the percentage allocations of available cash from operating surplus between our common unitholders and the holder of our incentive distribution rights (“IDRs”) based on the specified target distribution levels, after the payment of distributions to Class C unitholders. The amounts set forth under “marginal percentage interest in distributions” are the percentage interests of our IDR holder and the common unitholders in any available cash from operating surplus we distribute up to and including the corresponding amount in the column “total quarterly distribution per unit target amount.” The percentage interests shown for our common unitholders and our IDR holder for the minimum quarterly distribution are also applicable to quarterly distribution amounts that are less than the minimum quarterly distribution.



		Marginal percentage interest in distributions
	Total quarterly distribution per Common Unit target amount	Common Unitholders		Holder of IDRs
Minimum Quarterly Distribution	$0.4375	100	%	—
First Target Distribution	Above $0.4375 up to $0.503125	100	%	—
Second Target Distribution	Above $0.503125 up to $0.546875	85	%	15	%
Third Target Distribution	Above $0.546875 up to $0.656250	75	%	25	%
Thereafter	Above $0.656250	50	%	50	%

Distributions Made to Limited Partner, by Distribution

ash distributions paid or payable during 2018 were as follows:



	Limited Partners
Payment Date	Per Unit Distribution		Total Cash Distribution		Distribution to IDR Holders
	(in millions, except per unit amounts)
May 15, 2018	$	0.8255	$	68	$	18
February 14, 2018	$	0.8255	$	82	$	21