Segment Disclosures (Tables)

6 Months Ended

Jun. 30, 2014

Segment Reporting [Abstract]

Reconciliation of segment revenues and segment profit (loss)

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			Williams NGL & Petchem Services			Access Midstream Partners			Other		Eliminations			Total
	(Millions)
Three months ended June 30, 2014
Segment revenues:
Service revenues
External	$	763		$	—		$	—		$	62	$	—		$	825
Internal	—			—			—			4		(4		)	—
Total service revenues	763			—			—			66		(4		)	825
Product sales
External	853			—			—			—		—			853
Internal	—			—			—			—		—			—
Total product sales	853			—			—			—		—			853
Total revenues	$	1,616		$	—		$	—		$	66	$	(4	)	$	1,678
Segment profit (loss)	$	393		$	(8	)	$	9		$	1				$	395
Less:
Equity earnings (losses)	32			(2		)	7			—					37
Income (loss) from investments	—			—			4			—					4
Segment operating income (loss)	$	361		$	(6	)	$	(2	)	$	1				354
General corporate expenses															(43		)
Operating income (loss)															$	311
Three months ended June 30, 2013
Segment revenues:
Service revenues
External	$	717		$	—		$	—		$	4	$	—		$	721
Internal	—			—			—			3		(3		)	—
Total service revenues	717			—			—			7		(3		)	721
Product sales
External	1,046			—			—			—		—			1,046
Internal	—			—			—			—		—			—
Total product sales	1,046			—			—			—		—			1,046
Total revenues	$	1,763		$	—		$	—		$	7	$	(3	)	$	1,767
Segment profit (loss)	$	427		$	(1	)	$	29		$	1				$	456
Less:
Equity earnings (losses)	35			—			3			—					38
Income (loss) from investments	(1		)	—			26			—					25
Segment operating income (loss)	$	393		$	(1	)	$	—		$	1				393
General corporate expenses															(43		)
Operating income (loss)															$	350

	Williams Partners			Williams NGL & Petchem Services			Access Midstream Partners			Other			Eliminations			Total
	(Millions)
Six months ended June 30, 2014
Segment revenues:
Service revenues
External	$	1,526		$	—		$	—		$	118		$	—		$	1,644
Internal	—			—			—			7			(7		)	—
Total service revenues	1,526			—			—			125			(7		)	1,644
Product sales
External	1,783			—			—			—			—			1,783
Internal	—			—			—			—			—			—
Total product sales	1,783			—			—			—			—			1,783
Total revenues	$	3,309		$	—		$	—		$	125		$	(7	)	$	3,427
Segment profit (loss)	$	896		$	(108	)	$	15		$	4					$	807
Less:
Equity earnings (losses)	55			(79		)	13			—						(11		)
Income (loss) from investments	—			—			4			—						4
Segment operating income (loss)	$	841		$	(29	)	$	(2	)	$	4					814
General corporate expenses																(83		)
Operating income (loss)																$	731
Six months ended June 30, 2013
Segment revenues:
Service revenues
External	$	1,419		$	—		$	—		$	8		$	—		$	1,427
Internal	—			—			—			6			(6		)	—
Total service revenues	1,419			—			—			14			(6		)	1,427
Product sales
External	2,150			—			—			—			—			2,150
Internal	—			—			—			—			—			—
Total product sales	2,150			—			—			—			—			2,150
Total revenues	$	3,569		$	—		$	—		$	14		$	(6	)	$	3,577
Segment profit (loss)	$	921		$	(3	)	$	29		$	(4	)				$	943
Less:
Equity earnings (losses)	53			—			3			—						56
Income (loss) from investments	(2		)	—			26			—						24
Segment operating income (loss)	$	870		$	(3	)	$	—		$	(4	)				863
General corporate expenses																(87		)
Operating income (loss)																$	776
June 30, 2014
Total assets	$	25,738		$	439		$	2,113		$	7,202		$	(543	)	$	34,949
December 31, 2013
Total assets	$	23,571		$	486		$	2,161		$	1,359		$	(435	)	$	27,142