Consolidated Statement of Income (Unaudited) (USD $) In Millions, except Share data in Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Revenues:
Service revenues	$ 721	$ 667	$ 1,427	$ 1,344
Product sales	1,046	1,179	2,150	2,521
Total revenues	1,767	1,846	3,577	3,865
Costs and expenses:
Product costs	801	900	1,591	1,857
Operating and maintenance expenses	291	275	551	505
Depreciation and amortization expenses	198	181	399	349
Selling, general, and administrative expenses	123	149	255	278
Other (income) expense - net	4	9	5	17
Total costs and expenses	1,417	1,514	2,801	3,006
Operating income (loss)	350	332	776	859
Equity earnings (losses)	38	27	56	58
Interest incurred	(151)	(140)	(303)	(281)
Interest capitalized	24	12	48	22
Other investing income - net	39	3	52	72
Other income (expense) - net	2	3	0	(1)
Income (loss) from continuing operations before income taxes	302	237	629	729
Provision (benefit) for income taxes	102	71	198	204
Income (loss) from continuing operations	200	166	431	525
Income (loss) from discontinued operations	(8)	(1)	(9)	135
Net income (loss)	192	165	422	660
Less: Net income attributable to noncontrolling interests	50	33	119	105
Net income (loss) attributable to The Williams Companies, Inc.	142	132	303	555
Amounts attributable to The Williams Companies, Inc.:
Income (loss) from continuing operations	149	133	311	420
Income (loss) from discontinued operations	(7)	(1)	(8)	135
Net income (loss)	$ 142	$ 132	$ 303	$ 555
Basic earnings (loss) per common share:
Income (loss) from continuing operations	$ 0.22	$ 0.21	$ 0.45	$ 0.69
Income (loss) from discontinued operations	$ (0.01)	$ 0	$ (0.01)	$ 0.22
Net income (loss)	$ 0.21	$ 0.21	$ 0.44	$ 0.91
Weighted-average shares (thousands)	682,893	621,483	682,475	607,357
Diluted earnings (loss) per common share:
Income (loss) from continuing operations	$ 0.22	$ 0.21	$ 0.45	$ 0.68
Income (loss) from discontinued operations	$ (0.01)	$ 0	$ (0.01)	$ 0.22
Net income (loss)	$ 0.21	$ 0.21	$ 0.44	$ 0.90
Weighted-average shares (thousands)	686,924	626,620	686,855	613,570
Cash dividends declared per common share	$ 0.3525	$ 0.300	$ 0.69125	$ 0.55875