Segment Disclosures (Tables)

9 Months Ended

Sep. 30, 2011

Segment Disclosures [Abstract]

Reconciliation of segment revenues and segment profit (loss) and total assets by reporting segment

					Exploration		Midstream
			Williams		&		Canada &
			Partners		Production		Olefins		Other		Eliminations		Total
			(Millions)
Three months ended September 30, 2011
Segment revenues:
	External	$	1,560	$	817	$	325	$	1	$	-	$	2,703
	Internal		113		205		1		5		(324)		-
Total revenues		$	1,673	$	1,022	$	326	$	6	$	(324)	$	2,703
Segment profit (loss)		$	471	$	48	$	73	$	1	$	-	$	593
Less equity earnings (losses)			40		5		-		-		-		45
Segment operating income (loss)		$	431	$	43	$	73	$	1	$	-		548
General corporate expenses													(54)
Total operating income (loss)												$	494
Three months ended September 30, 2010
Segment revenues:
	External	$	1,236	$	833	$	228	$	3	$	-	$	2,300
	Internal		91		172		4		3		(270)		-
Total revenues		$	1,327	$	1,005	$	232	$	6	$	(270)	$	2,300
Segment profit (loss)		$	371	$	(1,630)	$	42	$	38	$	-	$	(1,179)
Less:
	Equity earnings (losses)		24		5		-		9		-		38
	Income (loss) from investments		-		-		-		30		-		30
Segment operating income (loss)		$	347	$	(1,635)	$	42	$	(1)	$	-		(1,247)
General corporate expenses													(43)
Total operating income (loss)												$	(1,290)
Nine months ended September 30, 2011
Segment revenues:
	External	$	4,595	$	2,358	$	986	$	8	$	-	$	7,947
	Internal		328		634		3		11		(976)		-
Total revenues		$	4,923	$	2,992	$	989	$	19	$	(976)	$	7,947
Segment profit (loss)		$	1,379	$	193	$	219	$	23	$	-	$	1,814
Less:
	Equity earnings (losses)		101		16		-		13		-		130
	Income (loss) from investments		-		-		-		11		-		11
Segment operating income (loss)		$	1,278	$	177	$	219	$	(1)	$	-		1,673
General corporate expenses													(152)
Total operating income (loss)												$	1,521
Nine months ended September 30, 2010
Segment revenues:
	External	$	3,940	$	2,484	$	749	$	7	$	-	$	7,180
	Internal		277		579		12		10		(878)		-
Total revenues		$	4,217	$	3,063	$	761	$	17	$	(878)	$	7,180
Segment profit (loss)		$	1,156	$	(1,404)	$	123	$	63	$	-	$	(62)
Less:
	Equity earnings (losses)		77		15		-		25		-		117
	Income (loss) from investments		-		-		-		43		-		43
Segment operating income (loss)		$	1,079	$	(1,419)	$	123	$	(5)	$	-		(222)
General corporate expenses													(173)
Total operating income (loss)												$	(395)
September 30, 2011
Total assets (a)		$	14,047	$	10,038	$	1,071	$	1,322	$	(332)	$	26,146
December 31, 2010
Total assets		$	13,404	$	9,827	$	922	$	3,481	$	(2,662)	$	24,972

___________

• The decrease inOtherand Eliminations as compared to the prior year-end is substantially due to the forgiveness of an intercompany long-term receivable in the second-quarter of 2011.