Investing Activities (Tables)

12 Months Ended

Dec. 31, 2018

Impairment of equity-method investments

The following table presents other-than-temporary impairment charges related to certain equity-method investments (see Note 17 – Fair Value Measurements, Guarantees, and Concentration of Credit Risk):



	Years Ended December 31,
	2018		2017		2016
	(Millions)
Northeast G&P
UEOM	$	32	$	—	$	—
Appalachia Midstream Investments	—		—		294
Laurel Mountain	—		—		50
West
DBJV	—		—		59
Ranch Westex	—		—		24
Other	—		—		3
	$	32	$	—	$	430

Investments [Table Text Block]

Investments



	Ownership Interest at December 31, 2018	December 31,
	Ownership Interest at December 31, 2018	2018		2017
		(Millions)
Equity-method investments:
Appalachia Midstream Investments	(1)	$	3,218	$	3,104
UEOM	62%	1,293		1,383
RMM	50%	776		—
Discovery	60%	507		534
OPPL	50%	415		422
Caiman II	58%	412		429
Jackalope	50%	343		—
Laurel Mountain	69%	314		309
Gulfstream	50%	225		244
Brazos Permian II	15%	191		—
Other	Various	127		127
		$	7,821	$	6,552

___________


(1)	Includes equity-method investments in multiple gathering systems in the Marcellus Shale with an approximate average 66 percent interest.

Contributions [Table Text Block]

Purchases of and contributions to equity-method investments

We generally fund our portion of significant expansion or development projects of these investees through additional capital contributions. These transactions increased the carrying value of our investments and included:



	Years Ended December 31,
	2018		2017		2016
	(Millions)
RMM	$	795	$	—	$	—
Appalachia Midstream Investments	246		70		28
Jackalope	42		—		—
Brazos Permian II	27		—		—
Laurel Mountain	16		—		—
Discovery	5		1		—
DBJV	—		32		105
Caiman II	—		24		22
Other	1		5		22
	$	1,132	$	132	$	177

Dividends and distributions [Table Text Block]

Dividends and distributions

The organizational documents of entities in which we have an equity-method investment generally require distribution of available cash to members on at least a quarterly basis. These transactions reduced the carrying value of our investments and included:



	Years Ended December 31,
	2018		2017		2016
	(Millions)
Appalachia Midstream Investments	$	297	$	270	$	211
Gulfstream	93		92		100
OPPL	73		68		69
UEOM	70		80		92
Caiman II	46		49		40
Discovery	45		127		141
DBJV	—		39		39
Laurel Mountain	23		32		28
Other	46		27		22
	$	693	$	784	$	742

Summarized Financial Position and Results of Operations of Equity Method Investments [Table Text Block]

Summarized Financial Position and Results of Operations of All Equity-Method Investments



	December 31,
	2018			2017
	(Millions)
Assets (liabilities):
Current assets	$	834		$	447
Noncurrent assets	13,199			9,181
Current liabilities	(605		)	(295		)
Noncurrent liabilities	(2,491		)	(1,538		)



	Years Ended December 31,
	2018		2017		2016
	(Millions)
Gross revenue	$	2,411	$	1,961	$	1,883
Operating income	804		871		799
Net income	795		806		726