Segment Disclosures (Tables)

9 Months Ended

Sep. 30, 2014

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment [Table Text Block]

The following table reflects the reconciliation of Segment revenues and Segment profit (loss) to Total revenues and Operating income (loss) as reported in the Consolidated Statement of Income and Total assets by reportable segment.

	Williams Partners			Access Midstream Partners		Williams NGL & Petchem Services			Other			Eliminations			Total
	(Millions)
Three months ended September 30, 2014
Segment revenues:
Service revenues
External	$	765		$	300	$	—		$	62		$	—		$	1,127
Internal	1			—		—			7			(8		)	—
Total service revenues	766			300		—			69			(8		)	1,127
Product sales
External	942			—		—			—			—			942
Internal	—			—		—			—			—			—
Total product sales	942			—		—			—			—			942
Total revenues	$	1,708		$	300	$	—		$	69		$	(8	)	$	2,069
Segment profit (loss)	$	373		$	2,563	$	(3	)	$	1					$	2,934
Less:
Equity earnings (losses)	36			29		1			—						66
Income (loss) from investments	—			2,519		—			—						2,519
Segment operating income (loss)	$	337		$	15	$	(4	)	$	1					349
General corporate expenses															(42		)
Operating income (loss)															$	307
Three months ended September 30, 2013
Segment revenues:
Service revenues
External	$	731		$	—	$	—		$	5		$	—		$	736
Internal	—			—		—			2			(2		)	—
Total service revenues	731			—		—			7			(2		)	736
Product sales
External	887			—		—			—			—			887
Internal	—			—		—			—			—			—
Total product sales	887			—		—			—			—			887
Total revenues	$	1,618		$	—	$	—		$	7		$	(2	)	$	1,623
Segment profit (loss)	$	411		$	6	$	(4	)	$	(1	)				$	412
Less:
Equity earnings (losses)	31			6		—			—						37
Income (loss) from investments	(1		)	—		—			—						(1		)
Segment operating income (loss)	$	381		$	—	$	(4	)	$	(1	)				376
General corporate expenses															(40		)
Operating income (loss)															$	336

	Williams Partners			Access Midstream Partners		Williams NGL & Petchem Services			Other			Eliminations			Total
	(Millions)
Nine months ended September 30, 2014
Segment revenues:
Service revenues
External	$	2,291		$	300	$	—		$	180		$	—		$	2,771
Internal	1			—		—			14			(15		)	—
Total service revenues	2,292			300		—			194			(15		)	2,771
Product sales
External	2,725			—		—			—			—			2,725
Internal	—			—		—			—			—			—
Total product sales	2,725			—		—			—			—			2,725
Total revenues	$	5,017		$	300	$	—		$	194		$	(15	)	$	5,496
Segment profit (loss)	$	1,269		$	2,578	$	(111	)	$	5					$	3,741
Less:
Equity earnings (losses)	91			42		(78		)	—						55
Income (loss) from investments	—			2,523		—			—						2,523
Segment operating income (loss)	$	1,178		$	13	$	(33	)	$	5					1,163
General corporate expenses															(125		)
Operating income (loss)															$	1,038
Nine months ended September 30, 2013
Segment revenues:
Service revenues
External	$	2,150		$	—	$	—		$	13		$	—		$	2,163
Internal	—			—		—			8			(8		)	—
Total service revenues	2,150			—		—			21			(8		)	2,163
Product sales
External	3,037			—		—			—			—			3,037
Internal	—			—		—			—			—			—
Total product sales	3,037			—		—			—			—			3,037
Total revenues	$	5,187		$	—	$	—		$	21		$	(8	)	$	5,200
Segment profit (loss)	$	1,332		$	35	$	(7	)	$	(5	)				$	1,355
Less:
Equity earnings (losses)	84			9		—			—						93
Income (loss) from investments	(3		)	26		—			—						23
Segment operating income (loss)	$	1,251		$	—	$	(7	)	$	(5	)				1,239
General corporate expenses															(127		)
Operating income (loss)															$	1,112
September 30, 2014
Total assets	$	25,814		$	22,765	$	516		$	1,251		$	(539	)	$	49,807
December 31, 2013
Total assets	$	23,571		$	2,161	$	486		$	1,359		$	(435	)	$	27,142