Segment Disclosures (Tables)

9 Months Ended

Sep. 30, 2018

Segment Reporting [Abstract]

Reconciliation of Revenue from Segments to Consolidated [Table Text Block]

The following table reflects the reconciliation of Segment revenues to Total revenues as reported in the Consolidated Statement of Income and Total assets by reportable segment.

	Northeast G&P		Atlantic-Gulf		West		Other (1)		Eliminations (2)			Total
	(Millions)
Three Months Ended September 30, 2018
Segment revenues:
Service revenues
External	$	236	$	595	$	533	$	7	$	—		$	1,371
Internal	11		12		—		3		(26		)	—
Total service revenues	247		607		533		10		(26		)	1,371
Total service revenues – commodity consideration (external only)	6		18		97		—		—			121
Product sales
External	59		46		706		—		—			811
Internal	10		85		26		—		(121		)	—
Total product sales	69		131		732		—		(121		)	811
Total revenues	$	322	$	756	$	1,362	$	10	$	(147	)	$	2,303
Three Months Ended September 30, 2017
Segment revenues:
Service revenues
External	$	207	$	553	$	544	$	6	$	—		$	1,310
Internal	7		11		—		3		(21		)	—
Total service revenues	214		564		544		9		(21		)	1,310
Product sales
External	56		57		459		9		—			581
Internal	5		49		26		—		(80		)	—
Total product sales	61		106		485		9		(80		)	581
Total revenues	$	275	$	670	$	1,029	$	18	$	(101	)	$	1,891
Nine Months Ended September 30, 2018
Segment revenues:
Service revenues
External	$	677	$	1,769	$	1,599	$	17	$	—		$	4,062
Internal	30		37		—		9		(76		)	—
Total service revenues	707		1,806		1,599		26		(76		)	4,062
Total service revenues – commodity consideration (external only)	14		45		257		—		—			316
Product sales
External	214		131		1,759		—		—			2,104
Internal	28		198		63		—		(289		)	—
Total product sales	242		329		1,822		—		(289		)	2,104
Total revenues	$	963	$	2,180	$	3,678	$	26	$	(365	)	$	6,482

	Northeast G&P		Atlantic-Gulf		West		Other (1)		Eliminations (2)			Total
	(Millions)
Nine Months Ended September 30, 2017
Segment revenues:
Service revenues
External	$	621	$	1,620	$	1,589	$	23	$	—		$	3,853
Internal	27		27		—		9		(63		)	—
Total service revenues	648		1,647		1,589		32		(63		)	3,853
Product sales
External	159		201		1,233		357		—			1,950
Internal	22		164		143		8		(337		)	—
Total product sales	181		365		1,376		365		(337		)	1,950
Total revenues	$	829	$	2,012	$	2,965	$	397	$	(400	)	$	5,803
September 30, 2018
Total assets	$	14,482	$	16,361	$	16,169	$	748	$	(607	)	$	47,153
December 31, 2017
Total assets	$	14,397	$	14,989	$	16,143	$	1,449	$	(626	)	$	46,352

___________

(1) Decrease in Other Total assets due primarily to decreased cash balance.

(2) Total assets Eliminations primarily relate to the intercompany notes and accounts receivable generated by our cash management program.

Reconciliation of Modified EBITDA to Net Income (Loss) [Table Text Block]

The following table reflects the reconciliation of Modified EBITDA to Net income (loss) as reported in the Consolidated Statement of Income.

	Three Months Ended   September 30,						Nine Months Ended   September 30,
	2018			2017			2018			2017
	(Millions)
Modified EBITDA by segment:
Northeast	$	281		$	115		$	786		$	588
Atlantic-Gulf	492			430			1,418			1,334
West	412			(615		)	1,214			126
Other	6			1,009			(49		)	1,100
	1,191			939			3,369			3,148
Accretion expense associated with asset retirement obligations for nonregulated operations	(8		)	(7		)	(26		)	(23		)
Depreciation and amortization expenses	(425		)	(433		)	(1,290		)	(1,308		)
Equity earnings (losses)	105			115			279			347
Other investing income (loss) – net	2			4			74			278
Proportional Modified EBITDA of equity-method investments	(205		)	(202		)	(552		)	(611		)
Interest expense	(270		)	(267		)	(818		)	(818		)
(Provision) benefit for income taxes	(190		)	(24		)	(297		)	(126		)
Net income (loss)	$	200		$	125		$	739		$	887