The Williams Companies, Inc. (WMB) 10-K 26 Feb 14 2013 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
	Dec. 31, 2013	Feb. 21, 2014	Jun. 30, 2013
Document and Entity Information [Abstract]	'	'	'
Entity Registrant Name	'Williams Companies Inc	'	'
Entity Central Index Key	'0000107263	'	'
Document Type	'10-K	'	'
Document Period End Date	31-Dec-13	'	'
Amendment Flag	'false	'	'
Document Fiscal Year Focus	'2013	'	'
Document Fiscal Period Focus	'FY	'	'
Current Fiscal Year End Date	'--12-31	'	'
Entity Well-known Seasoned Issuer	'Yes	'	'
Entity Voluntary Filers	'No	'	'
Entity Current Reporting Status	'Yes	'	'
Entity Filer Category	'Large Accelerated Filer	'	'
Entity Public Float	'	'	$22,144,393,171
Entity Common Stock, Shares Outstanding	'	684,417,475	'

Consolidated_Statement_of_Inco

Consolidated Statement of Income (USD $)	12 Months Ended
In Millions, except Share data in Thousands, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Revenues:	'		'		'
Service revenues	$2,939		$2,729		$2,532
Product sales	3,921		4,757		5,398
Total revenues	6,860		7,486		7,930
Costs and expenses:	'		'		'
Product costs	3,027		3,496		3,934
Operating and maintenance expenses	1,097		1,027		990
Depreciation and amortization expenses	815		756		661
Selling, general, and administrative expenses	512		571		477
Other (income) expense - net	34		24		1
Total costs and expenses	5,485		5,874		6,063
Operating income (loss)	1,375		1,612		1,867
Equity earnings (losses)	134	[1]	111	[1]	155	[1]
Interest incurred	-611		-568		-598
Interest capitalized	101		59		25
Other investing income - net	81		77		13
Early debt retirement costs	0		0		-271
Other income (expense) - net	0		-2		11
Income (loss) from continuing operations before income taxes	1,080		1,289		1,202
Provision (benefit) for income taxes	401		360		124
Income (loss) from continuing operations	679		929		1,078
Income (loss) from discontinued operations	-11		136		-417
Net income (loss)	668		1,065		661
Less: Net income attributable to noncontrolling interests	238		206		285
Net income (loss) attributable to The Williams Companies, Inc.	430		859		376
Amounts attributable to The Williams Companies, Inc.:	'		'		'
Income (loss) from continuing operations	441		723		803
Income (loss) from discontinued operations	-11		136		-427
Net income (loss)	$430		$859		$376
Basic earnings (loss) per common share:	'		'		'
Income (loss) from continuing operations	$0.65		$1.17		$1.36
Income (loss) from discontinued operations	($0.02)		$0.22		($0.72)
Net income (loss)	$0.63		$1.39		$0.64
Weighted-average shares (thousands)	682,948		619,792		588,553
Diluted earnings (loss) per common share:	'		'		'
Income (loss) from continuing operations	$0.64		$1.15		$1.34
Income (loss) from discontinued operations	($0.02)		$0.22		($0.71)
Net income (loss)	$0.62		$1.37		$0.63
Weighted-average shares (thousands)	687,185		625,486		598,175
[1]	Items also included in Segment profit (loss). (See Note 18 – Segment Disclosures.)

Consolidated_Statement_of_Comp

Consolidated Statement of Comprehensive Income (Loss) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Comprehensive income (loss):	'	'	'
Net income (loss)	$668	$1,065	$661
Cash flow hedging activities:	'	'	'
Net unrealized gain (loss) from derivative instruments, net of taxes	1	22	243
Reclassifications into earnings of net derivative instruments (gain) loss, net of taxes	-1	-23	-190
Foreign currency translation adjustments	-41	22	-18
Pension and other postretirement benefits:	'	'	'
Prior service credit (cost) arising during the year, net of taxes	14	1	1
Amortization of prior service cost (credit) included in net periodic benefit cost, net of taxes	-2	-1	-2
Net actuarial gain (loss) arising during the year, net of taxes	189	-30	-152
Amortization of actuarial (gain) loss included in net periodic benefit cost, net of taxes	38	39	27
Equity securities:	'	'	'
Unrealized gain (loss) on equity securities, net of taxes	0	0	3
Reclassifications into earnings of (gain) loss on sale of equity securities, net of taxes	0	-3	0
Other comprehensive income (loss)	198	27	-88
Comprehensive income (loss)	866	1,092	573
Less: Comprehensive income (loss) attributable to noncontrolling interest	238	206	285
Comprehensive Income (loss) attributable to The Williams Companies, Inc.	$628	$886	$288

Consolidated_Statement_of_Comp1

Consolidated Statement of Comprehensive Income (Loss) (Parenthetical) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Other Comprehensive Income Derivatives Qualifying As Hedges Tax Effect Period Increase Decrease [Abstract]	'	'	'
Other Comprehensive Income, Unrealized Gain (Loss) on Derivatives Arising During Period, Tax	$0	($7)	($152)
Other Comprehensive Income Loss Reclassification Adjustment On Derivatives Included In Net Income Tax	0	7	124
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax	24	0	0
Other Comprehensive Income Defined Benefit Plans Tax [Abstract]	'	'	'
Other Comprehensive Income Loss Pension And Other Postretirement Benfit Plans, Benefit Plan Improvement, Tax Effect	-9	-1	-1
Other Comprehensive Income Amortization Of Defined Benefit Plan Net Prior Service Cost Recognized In Net Periodic Pension Cost Tax	1	1	1
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Tax	-111	19	89
Other Comprehensive Income Loss Reclassification Pension And Other Postretirement Benefit Plans Net Gain Loss Recognized In Net Periodic Benefit Cost Tax	-23	-22	-16
Other Comprehensive Income Available For Sale Securities Tax [Abstract]	'	'	'
Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax	0	0	-2
Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Tax	$0	$2	$0

Consolidated_Balance_Sheet

Consolidated Balance Sheet (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Current assets:	'	'
Cash and cash equivalents	$681	$839
Accounts and notes receivable, net:	'	'
Trade and other	600	620
Income tax receivable	74	68
Deferred income tax asset	27	117
Inventories	194	175
Other current assets and deferred charges	107	105
Total current assets	1,683	1,924
Investments	4,360	3,987
Property, plant, and equipment - net	18,210	15,467
Goodwill	646	649
Other intangible assets	1,644	1,704
Regulatory assets, deferred charges, and other	599	596
Total assets	27,142	24,327
Current liabilities:	'	'
Accounts payable	960	920
Accrued liabilities	797	628
Commercial paper	225	0
Long-term debt due within one year	1	1
Total current liabilities	1,983	1,549
Long-term debt	11,353	10,735
Deferred income taxes	3,529	2,841
Other noncurrent liabilities	1,356	1,775
Contingent liabilities and commitments (Note 17)	'	'
Stockholders' equity:	'	'
Common stock (960 million shares authorized at $1 par value; 718 million shares issued at December 31, 2013, and 716 million shares issued at December 31, 2012)	718	716
Capital in excess of par value	11,599	11,134
Retained deficit	-6,248	-5,695
Accumulated other comprehensive income (loss)	-164	-362
Treasury stock, at cost (35 million shares of common stock)	-1,041	-1,041
Total stockholders' equity	4,864	4,752
Noncontrolling interests in consolidated subsidiaries	4,057	2,675
Total equity	8,921	7,427
Total liabilities and equity	$27,142	$24,327

Consolidated_Balance_Sheet_Par

Consolidated Balance Sheet (Parenthetical) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Millions, except Per Share data, unless otherwise specified
Stockholders' equity:	'	'
Common Stock, Shares Authorized	960	960
Common Stock, Par or Stated Value Per Share	$1	$1
Common Stock, Shares Issued	718	716
Treasury Stock, Shares	35	35

Consolidated_Statement_of_Chan

Consolidated Statement of Changes in Equity (USD $)	Total	Common Stock	Capital in Excess of Par Value	Retained Earnings (Deficit)	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Total Stockholders' Equity	Noncontrolling Interests
In Millions
Beginning balance at Dec. 31, 2010	$8,134	$620	$7,784	($478)	($82)	($1,041)	$6,803	$1,331
Net income (loss)	661	0	0	376	0	0	376	285
Other comprehensive income (loss)	-88	0	0	0	-88	0	-88	0
Cash dividends - common stock (Note 14)	-457	0	0	-457	0	0	-457	0
Dividends and distributions to noncontrolling interests	-214	0	0	0	0	0	0	-214
Issuance of common stock from debentures conversion	14	1	13	0	0	0	14	0
Stock-based compensation and related common stock issuances, net of tax	108	4	104	0	0	0	108	0
Changes in Williams Partners L.P. ownership interest, net	-12	0	18	0	0	0	18	-30
Distribution of WPX Energy, Inc to shareholders (Note 4)	-5,561	0	0	-5,261	-219	0	-5,480	-81
Other	1	1	1	0	0	0	2	-1
Ending balance at Dec. 31, 2011	2,586	626	7,920	-5,820	-389	-1,041	1,296	1,290
Net income (loss)	1,065	0	0	859	0	0	859	206
Other comprehensive income (loss)	27	0	0	0	27	0	27	0
Cash dividends - common stock (Note 14)	-742	0	0	-742	0	0	-742	0
Dividends and distributions to noncontrolling interests	-387	0	0	0	0	0	0	-387
Issuance of common stock from debentures conversion	6	1	5	0	0	0	6	0
Stock-based compensation and related common stock issuances, net of tax	104	6	98	0	0	0	104	0
Sales of limited partner units of Williams Partners L.P.	1,559	0	0	0	0	0	0	1,559
Issuances of limited partner units of Williams Partners L.P. related to acquisitions	1,044	0	0	0	0	0	0	1,044
Changes in Williams Partners L.P. ownership interest, net	-416	0	699	0	0	0	699	-1,115
Sales of common stock (Note 14)	2,495	83	2,412	0	0	0	2,495	0
Reconsolidation of noncontrolling interest in Wilpro entities (Note 4)	65	0	0	0	0	0	0	65
Contributions from noncontrolling interests	14	0	0	0	0	0	0	14
Other	7	0	0	8	0	0	8	-1
Ending balance at Dec. 31, 2012	7,427	716	11,134	-5,695	-362	-1,041	4,752	2,675
Net income (loss)	668	0	0	430	0	0	430	238
Other comprehensive income (loss)	198	0	0	0	198	0	198	0
Cash dividends - common stock (Note 14)	-982	0	0	-982	0	0	-982	0
Dividends and distributions to noncontrolling interests	-489	0	0	0	0	0	0	-489
Issuance of common stock from debentures conversion	1	0	1	0	0	0	1	0
Stock-based compensation and related common stock issuances, net of tax	56	2	54	0	0	0	56	0
Sales of limited partner units of Williams Partners L.P.	1,819	0	0	0	0	0	0	1,819
Changes in ownership of consolidated subsidiaries, net	-243	0	409	0	0	0	409	-652
Contributions from noncontrolling interests	467	0	0	0	0	0	0	467
Other	-1	0	1	-1	0	0	0	-1
Ending balance at Dec. 31, 2013	$8,921	$718	$11,599	($6,248)	($164)	($1,041)	$4,864	$4,057

Consolidated_Statement_of_Cash

Consolidated Statement of Cash Flows (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
OPERATING ACTIVITIES:	'	'	'
Net income (loss)	$668	$1,065	$661
Adjustments to reconcile to net cash provided (used) by operating activities:	'	'	'
Depreciation, depletion, and amortization	815	756	1,614
Provision (benefit) for deferred income taxes	424	206	-179
Provision for loss on investments, property, and other assets	0	0	882
Net (gain) loss on dispositions of assets	28	-52	-1
Gain on reconsolidation of Wilpro entities (Note 4)	0	-144	0
Amortization of stock-based awards	37	36	52
Early debt retirement costs	0	0	271
Cash provided (used) by changes in current assets and liabilities:	'	'	'
Accounts and notes receivable	35	27	-197
Inventories	-17	5	60
Other current assets and deferred charges	25	29	-15
Accounts payable	-35	-110	250
Accrued liabilities	175	0	51
Other, including changes in noncurrent assets and liabilities	62	17	-10
Net cash provided (used) by operating activities	2,217	1,835	3,439
FINANCING ACTIVITIES:	'	'	'
Proceeds from (payments of) commercial paper - net	224	0	0
Proceeds from long-term debt	2,699	3,486	3,172
Payments of long-term debt	-2,081	-1,468	-2,055
Proceeds from issuance of common stock	18	2,550	49
Proceeds from sale of limited partner units of consolidated partnership	1,819	1,559	0
Dividends paid	-982	-742	-457
Dividends and distributions paid to noncontrolling interests	-489	-349	-214
Distributions paid to noncontrolling interests on sale of Wilpro assets (Note 4)	0	-38	0
Contributions from noncontrolling interests	467	13	0
Cash of WPX Energy, Inc. at spin-off	0	0	-526
Premiums paid on early debt retirements	0	0	-254
Other - net	2	25	-57
Net cash provided (used) by financing activities	1,677	5,036	-342
INVESTING ACTIVITIES:	'	'	'
Capital expenditures	-3,572	-2,529	-2,796
Purchases of and contributions to equity method investments	-455	-2,651	-211
Purchases of businesses	-6	-2,049	-41
Proceeds from dispositions of investments	0	79	16
Cash of Wilpro entities upon reconsolidation (Note 4)	0	121	0
Other - net	-19	108	29
Net cash provided (used) by investing activities	-4,052	-6,921	-3,003
Increase (decrease) in cash and cash equivalents	-158	-50	94
Cash and cash equivalents at beginning of year	839	889	795
Cash and cash equivalents at end of year	681	839	889
Increases to property, plant and equipment	-3,653	-2,755	-2,953
Changes in related accounts payable and accrued liabilities	81	226	157
Capital expenditures	($3,572)	($2,529)	($2,796)

General_Description_of_Busines

General, Description of Business, and Basis of Presentation	12 Months Ended
	Dec. 31, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Description of Business, Basis of Presentation and Summary Of Significant Accounting Policies [Text Block]	'
	Note 1 – Description of Business, Basis of Presentation, and Summary of Significant Accounting Policies
	Description of Business
	We are a Delaware corporation whose common stock is listed and traded on the New York Stock Exchange. Our operations are located principally in the United States and are organized into the Williams Partners, Williams NGL & Petchem Services, and Access Midstream Partners reportable segments. All remaining business activities are included in Other.
	Williams Partners consists of our consolidated master limited partnership, Williams Partners L.P. (WPZ), and includes gas pipeline and domestic midstream businesses. The gas pipeline businesses primarily consist of two interstate natural gas pipelines, which are Transcontinental Gas Pipe Line Company, LLC (Transco) and Northwest Pipeline LLC (Northwest Pipeline), a 50 percent equity investment in Gulfstream Natural Gas System, L.L.C. (Gulfstream), and a 41 percent interest in Constitution Pipeline Company, LLC (Constitution) (a consolidated entity). WPZ’s midstream operations are composed of significant, large-scale operations in the Rocky Mountain and Gulf Coast regions, operations in the Marcellus Shale region, and various equity investments in domestic natural gas gathering and processing assets and natural gas liquid (NGL) fractionation and transportation assets. WPZ’s midstream assets also include an NGL fractionator and storage facilities near Conway, Kansas, as well as an NGL light-feed olefins cracker in Geismar, Louisiana, along with associated ethane and propane pipelines, and a refinery grade splitter in Louisiana.
	Williams NGL & Petchem Services consists primarily of a Canadian oil sands offgas processing plant located near Fort McMurray, Alberta, an NGL/olefin fractionation facility and butylene/butane splitter facility at Redwater, Alberta, and a 50 percent interest in Bluegrass Pipeline Company LLC (Bluegrass Pipeline) (a consolidated entity).
	Access Midstream Partners consists of our equity investment in Access Midstream Partners, L.P. (ACMP). As of December 31, 2013, this investment includes an indirect 50 percent interest in Access Midstream Partners, GP, L.L.C. (Access GP), including incentive distribution rights, and a 23 percent limited partner interest in ACMP. ACMP is a publicly traded master limited partnership that provides gathering, treating, and compression services to producers under long-term, fee-based contracts. Access GP is the general partner of ACMP.
	Other includes other business activities that are not operating segments, as well as corporate operations.
	Basis of Presentation
	Consolidated master limited partnership
	During the first quarter of 2013, WPZ completed equity issuances of 15,937,500 common units representing limited partner interests, including 3,000,000 common units sold to us in a private placement transaction. In the third quarter of 2013, WPZ completed equity issuances of 24,725,000 common units representing limited partner interests. Following these transactions, we own approximately 64 percent of the interests in WPZ, including the interests of the general partner, which are wholly owned by us, and incentive distribution rights as of December 31, 2013.
	The previously described equity issuances by WPZ had the combined net impact of increasing our Noncontrolling interests in consolidated subsidiaries by $1.169 billion, Capital in excess of par value by $408 million and Deferred income taxes by $242 million in the Consolidated Balance Sheet.
	WPZ is self-funding and maintains separate lines of bank credit and cash management accounts. WPZ also initiated its commercial paper program in the first quarter of 2013. (See Note 13 – Debt, Banking Arrangements, and Leases.) Cash distributions from WPZ to us, including any associated with our incentive distribution rights, occur through the normal partnership distributions from WPZ to all partners.
	Discontinued operations
	On December 31, 2011, we completed the tax-free spin-off of our 100 percent interest in WPX Energy, Inc. (WPX), to our stockholders. The spin-off was completed by means of a special stock dividend, which consisted of a distribution of one share of WPX common stock for every three shares of our common stock. For periods prior to the spin-off, the accompanying Consolidated Statement of Income reflects the results of operations of our former exploration and production business as discontinued operations. The Consolidated Statement of Comprehensive Income and the Consolidated Statement of Cash Flows for 2011 includes the results of our former exploration and production business. (See Note 4 – Discontinued Operations.)
	The discontinued operations presented in the accompanying consolidated financial statements and notes reflect gains in 2012 associated with certain of our former Venezuela operations. (See Note 4 – Discontinued Operations.)
	Unless indicated otherwise, the information in the Notes to Consolidated Financial Statements relates to our continuing operations.
	Related party transaction
	A member of our Board of Directors, who was elected in 2013, is also the current chairman, president, and chief executive officer of an energy services company that is a customer of ours. We recorded $131 million in Service revenues in the Consolidated Statement of Income from this company for transportation and storage of natural gas for the year ended December 31, 2013. This board member does not have any material interest in any transactions between the energy services company and us and he had no role in any such transactions.
	Summary of Significant Accounting Policies
	Principles of consolidation
	The consolidated financial statements include the accounts of all entities that we control and our proportionate interest in the accounts of ventures in which we own an undivided interest. Management judgment is required to evaluate whether we control an entity. Key areas of that evaluation include:
	•	Determining whether an entity is a variable interest entity (VIE);
	•	Determining whether we are the primary beneficiary of a VIE, including evaluating which activities of the VIE most significantly impact its economic performance and the degree of power that we and our related parties have over those activities through our variable interests;
	•	Identifying events that require reconsideration of whether an entity is a VIE and continuously evaluating whether we are a VIE’s primary beneficiary;
	•	Evaluating whether other owners in entities that are not VIEs are able to effectively participate in significant decisions that would be expected to be made in the ordinary course of business such that we do not have the power to control such entities.
	We apply the equity method of accounting to investments in entities over which we exercise significant influence but do not control.
	Equity-method investment basis differences
	Differences between the cost of our equity investments and our underlying equity in the net assets of investees are accounted for as if the investees were consolidated subsidiaries. Equity earnings (losses) in the Consolidated Statement of Income includes our allocable share of net income (loss) of investees adjusted for any depreciation and amortization, as applicable, associated with basis differences.
	Use of estimates
	The preparation of financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results could differ from those estimates.
	Significant estimates and assumptions include:
	•	Impairment assessments of investments, property, plant, and equipment, goodwill, and other identifiable intangible assets;
	•	Litigation-related contingencies;
	•	Environmental remediation obligations;
	•	Realization of deferred income tax assets;
	•	Depreciation and/or amortization of equity-method investment basis differences;
	•	Asset retirement obligations;
	•	Pension and postretirement valuation variables;
	•	Acquisition related purchase price allocations.
	These estimates are discussed further throughout these notes.
	Regulatory accounting
	Transco and Northwest Pipeline are regulated by the Federal Energy Regulatory Commission (FERC). Their rates, which are established by the FERC, are designed to recover the costs of providing the regulated services, and their competitive environment makes it probable that such rates can be charged and collected. Therefore, our management has determined that it is appropriate to account for and report regulatory assets and liabilities related to these operations consistent with the economic effect of the way in which their rates are established. Accounting for these operations that are regulated can differ from the accounting requirements for nonregulated operations. The components of our regulatory assets and liabilities relate to the effects of deferred taxes on equity funds used during construction, asset retirement obligations, fuel cost differentials, levelized incremental depreciation, negative salvage, and postretirement benefits. Our current and noncurrent regulatory asset and liability balances for the years ended December 31, 2013 and 2012 are as follows:
		December 31,
		2013		2012
		(Millions)
	Current assets reported within Other current assets and deferred charges	$	39	$	39
	Noncurrent assets reported within Regulatory assets, deferred charges, and other	353		366
	Total regulated assets	$	392	$	405
	Current liabilities reported within Accrued liabilities	$	19	$	15
	Noncurrent liabilities reported within Other noncurrent liabilities	329		250
	Total regulated liabilities	$	348	$	265
	Cash and cash equivalents
	Cash and cash equivalents in the Consolidated Balance Sheet includes amounts primarily invested in funds with high-quality, short-term securities and instruments that are issued or guaranteed by the U.S. government. These have maturity dates of three months or less when acquired.
	Accounts receivable
	Accounts receivable are carried on a gross basis, with no discounting, less the allowance for doubtful accounts. We estimate the allowance for doubtful accounts based on existing economic conditions, the financial condition of our customers, and the amount and age of past due accounts. We consider receivables past due if full payment is not received by the contractual due date. Interest income related to past due accounts receivable is generally recognized at the time full payment is received or collectability is assured. Past due accounts are generally written off against the allowance for doubtful accounts only after all collection attempts have been exhausted.
	Inventory valuation
	All Inventories in the Consolidated Balance Sheet are stated at the lower of cost or market. The cost of inventories is primarily determined using the average-cost method.
	Property, plant, and equipment
	Property, plant, and equipment is recorded at cost. We base the carrying value of these assets on estimates, assumptions, and judgments relative to capitalized costs, useful lives, and salvage values.
	As regulated entities, Northwest Pipeline and Transco provide for depreciation using the straight-line method at FERC-prescribed rates. Depreciation for nonregulated entities is provided primarily on the straight-line method over estimated useful lives, except for certain offshore facilities that apply a declining balance method. (See Note 11 – Property, Plant, and Equipment.)
	Gains or losses from the ordinary sale or retirement of property, plant, and equipment for regulated pipelines are credited or charged to accumulated depreciation. Other gains or losses are recorded in Other (income) expense – net included in Operating income (loss) in the Consolidated Statement of Income.
	Ordinary maintenance and repair costs are generally expensed as incurred. Costs of major renewals and replacements are capitalized as property, plant, and equipment.
	We record a liability and increase the basis in the underlying asset for the present value of each expected future asset retirement obligation (ARO) at the time the liability is initially incurred, typically when the asset is acquired or constructed. As regulated entities, Northwest Pipeline and Transco offset the depreciation of the underlying asset that is attributable to capitalized ARO cost to a regulatory asset. We measure changes in the liability due to passage of time by applying an interest method of allocation. This amount is recognized as an increase in the carrying amount of the liability and as a corresponding accretion expense included in Operating and maintenance expenses in the Consolidated Statement of Income, except for regulated entities, for which the liability is offset by a regulatory asset as management expects to recover amounts in future rates. The regulatory asset is amortized commensurate with our collection of those costs in rates.
Measurements of AROs include, as a component of future expected costs, an estimate of the price that a third party would demand, and could expect to receive, for bearing the uncertainties inherent in the obligations, sometimes referred to as a market-risk premium.
Goodwill
Goodwill in the Consolidated Balance Sheet represents the excess cost over fair value of the net assets of businesses acquired. It is not subject to amortization but is evaluated annually as of October 1 for impairment or more frequently if impairment indicators are present that would indicate it is more likely than not that the fair value of the reporting unit is less than its carrying amount. As part of the evaluation, we compare our estimate of the fair value of the reporting unit with its carrying value, including goodwill. If the carrying value of the reporting unit exceeds its fair value, a computation of the implied fair value of the goodwill is compared with its related carrying value. If the carrying value of the reporting unit goodwill exceeds the implied fair value of that goodwill, an impairment loss is recognized in the amount of the excess.
Other intangible assets
Our identifiable intangible assets are primarily related to gas gathering, processing and fractionation contracts, and relationships with customers. Our intangible assets are amortized on a straight-line basis over the period in which these assets contribute to our cash flows. We evaluate these assets for changes in the expected remaining useful lives and would reflect any changes prospectively through amortization over the revised remaining useful life.
Impairment of property, plant, and equipment, other identifiable intangible assets, and investments
We evaluate our property, plant, and equipment and other identifiable intangible assets for impairment when events or changes in circumstances indicate, in our management’s judgment, that the carrying value of such assets may not be recoverable. When an indicator of impairment has occurred, we compare our management’s estimate of undiscounted future cash flows attributable to the assets to the carrying value of the assets to determine whether an impairment has occurred and we may apply a probability-weighted approach to consider the likelihood of different cash flow assumptions and possible outcomes including selling in the near term or holding for the remaining estimated useful life. If an impairment of the carrying value has occurred, we determine the amount of the impairment recognized in the financial statements by estimating the fair value of the assets and recording a loss for the amount that the carrying value exceeds the estimated fair value. This evaluation is performed at the lowest level for which separately identifiable cash flows exist.
For assets identified to be disposed of in the future and considered held for sale, we compare the carrying value to the estimated fair value less the cost to sell to determine if recognition of an impairment is required. Until the assets are disposed of, the estimated fair value, which includes estimated cash flows from operations until the assumed date of sale, is recalculated when related events or circumstances change.
We evaluate our investments for impairment when events or changes in circumstances indicate, in our management’s judgment, that the carrying value of such investments may have experienced an other-than-temporary decline in value. When evidence of loss in value has occurred, we compare our estimate of fair value of the investment to the carrying value of the investment to determine whether an impairment has occurred. If the estimated fair value is less than the carrying value and we consider the decline in value to be other-than-temporary, the excess of the carrying value over the fair value is recognized in the consolidated financial statements as an impairment charge.
Judgments and assumptions are inherent in our management’s estimate of undiscounted future cash flows and an asset’s or investment’s fair value. Additionally, judgment is used to determine the probability of sale with respect to assets considered for disposal.
Contingent liabilities
We record liabilities for estimated loss contingencies, including environmental matters, when we assess that a loss is probable and the amount of the loss can be reasonably estimated. These liabilities are calculated based upon our assumptions and estimates with respect to the likelihood or amount of loss and upon advice of legal counsel, engineers, or other third parties regarding the probable outcomes of the matters. These calculations are made without consideration of any potential recovery from third parties. We recognize insurance recoveries or reimbursements from others when realizable. Revisions to these liabilities are generally reflected in income when new or different facts or information become known or circumstances change that affect the previous assumptions or estimates.
Cash flows from revolving credit facilities and commercial paper program
Proceeds and payments related to borrowings under our credit facilities are reflected in the financing activities in the Consolidated Statement of Cash Flows on a gross basis. Proceeds and payments related to borrowings under our commercial paper program are reflected in the financing activities in the Consolidated Statement of Cash Flows on a net basis, as the outstanding notes generally have maturity dates less than three months from the date of issuance. (See Note 13 – Debt, Banking Arrangements, and Leases.)
Treasury stock
Treasury stock purchases are accounted for under the cost method whereby the entire cost of the acquired stock is recorded as Treasury stock in the Consolidated Balance Sheet. Gains and losses on the subsequent reissuance of shares are credited or charged to Capital in excess of par value in the Consolidated Balance Sheet using the average-cost method.
Derivative instruments and hedging activities
We may utilize derivatives to manage a portion of our commodity price risk. These instruments consist primarily of swaps, futures, and forward contracts involving short- and long-term purchases and sales of physical energy commodities. We report the fair value of derivatives, except for those for which the normal purchases and normal sales exception has been elected, in Other current assets and deferred charges; Regulatory assets, deferred charges, and other; Accrued liabilities, or Other noncurrent liabilities in the Consolidated Balance Sheet. We determine the current and noncurrent classification based on the timing of expected future cash flows of individual trades. We report these amounts on a gross basis. Additionally, we report cash collateral receivables and payables with our counterparties on a gross basis. See Note 16 – Fair Value Measurements, Guarantees, and Concentration of Credit Risk.
The accounting for the changes in fair value of a commodity derivative can be summarized as follows:
Derivative Treatment		Accounting Method
Normal purchases and normal sales exception		Accrual accounting
Designated in a qualifying hedging relationship		Hedge accounting
All other derivatives		Mark-to-market accounting
We may elect the normal purchases and normal sales exception for certain short- and long-term purchases and sales of physical energy commodities. Under accrual accounting, any change in the fair value of these derivatives is not reflected on the balance sheet after the initial election of the exception.
We may also designate a hedging relationship for certain commodity derivatives. For a derivative to qualify for designation in a hedging relationship, it must meet specific criteria and we must maintain appropriate documentation. We establish hedging relationships pursuant to our risk management policies. We evaluate the hedging relationships at the inception of the hedge and on an ongoing basis to determine whether the hedging relationship is, and is expected to remain, highly effective in achieving offsetting changes in fair value or cash flows attributable to the underlying risk being hedged. We also regularly assess whether the hedged forecasted transaction is probable of occurring. If a derivative ceases to be or is no longer expected to be highly effective, or if we believe the likelihood of occurrence of the hedged forecasted transaction is no longer probable, hedge accounting is discontinued prospectively, and future changes in the fair value of the derivative are recognized currently in Product sales or Product costs in the Consolidated Statement of Income.
For commodity derivatives designated as a cash flow hedge, the effective portion of the change in fair value of the derivative is reported in Accumulated other comprehensive income (loss) (AOCI) in the Consolidated Balance Sheet and reclassified into earnings in the period in which the hedged item affects earnings. Any ineffective portion of the derivative’s change in fair value is recognized currently in Product sales or Product costs in the Consolidated Statement of Income. Gains or losses deferred in AOCI associated with terminated derivatives, derivatives that cease to be highly effective hedges, derivatives for which the forecasted transaction is reasonably possible but no longer probable of occurring, and cash flow hedges that have been otherwise discontinued remain in AOCI until the hedged item affects earnings. If it becomes probable that the forecasted transaction designated as the hedged item in a cash flow hedge will not occur, any gain or loss deferred in AOCI is recognized in Product sales or Product costs in the Consolidated Statement of Income at that time. The change in likelihood of a forecasted transaction is a judgmental decision that includes qualitative assessments made by management.
For commodity derivatives that are not designated in a hedging relationship, and for which we have not elected the normal purchases and normal sales exception, we report changes in fair value currently in Product sales or Product costs in the Consolidated Statement of Income.
Certain gains and losses on derivative instruments included in the Consolidated Statement of Income are netted together to a single net gain or loss, while other gains and losses are reported on a gross basis. Gains and losses recorded on a net basis include unrealized gains and losses on all derivatives that are not designated as hedges and for which we have not elected the normal purchases and normal sales exception.
Realized gains and losses on derivatives that require physical delivery, as well as natural gas derivatives for NGL processing activities and which are not held for trading purposes nor were entered into as a pre-contemplated buy/sell arrangement, are recorded on a gross basis. In reaching our conclusions on this presentation, we considered whether we act as principal in the transaction; whether we have the risks and rewards of ownership, including credit risk; and whether we have latitude in establishing prices.
Revenues
As a result of the ratemaking process, certain revenues collected by us may be subject to refunds upon the issuance of final orders by the FERC in pending rate proceedings. We record estimates of rate refund liabilities considering our and other third-party regulatory proceedings, advice of counsel, and other risks.
Service revenues
Revenues from our gas pipeline businesses include services pursuant to long-term firm transportation and storage agreements. These agreements provide for a reservation charge based on the volume of contracted capacity and a commodity charge based on the volume of gas delivered, both at rates specified in our FERC tariffs. We recognize revenues for reservation charges ratably over the contract period regardless of the volume of natural gas that is transported or stored. Revenues for commodity charges, from both firm and interruptible transportation services, and storage injection and withdrawal services, are recognized when natural gas is delivered at the agreed upon delivery point or when natural gas is injected or withdrawn from the storage facility.
Certain revenues from our midstream operations include those derived from natural gas gathering and processing services and are performed under volumetric-based fee contracts. These revenues are recorded when services have been performed.
Crude oil gathering and transportation revenues and offshore production handling fees are recognized when the services have been performed. Certain offshore production handling contracts contain fixed payment terms that result in the deferral of revenues until such services have been performed.
Storage revenues from our midstream operations associated with prepaid contracted storage capacity contracts are recognized on a straight-line basis over the life of the contract as services are provided.
Product sales
In the course of providing transportation services to customers of our interstate natural gas pipeline businesses, we may receive different quantities of gas from shippers than the quantities delivered on behalf of those shippers. The resulting imbalances are primarily settled through the purchase and sale of gas with our customers under terms provided for in our FERC tariffs. Revenue is recognized from the sale of gas upon settlement of the transportation and exchange imbalances.
We market NGLs, crude oil, natural gas, and olefins that we purchase from our producer customers as part of the overall service provided to producers. Revenues from marketing NGLs are recognized when the products have been sold and delivered.
Under our keep-whole and percent-of-liquids processing contracts, we retain the rights to all or a portion of the NGLs extracted from the producers’ natural gas stream and recognize revenues when the extracted NGLs are sold and delivered.
Our domestic olefins business produces olefins from purchased or produced feedstock and we recognize revenues when the olefins are sold and delivered.
Our Canadian business has processing and fractionation operations where we retain certain NGLs and olefins from an upgrader’s offgas stream and we recognize revenues when the fractionated products are sold and delivered.
Interest capitalized
We capitalize interest during construction on major projects with construction periods of at least 3 months and a total project cost in excess of $1 million. Interest is capitalized on borrowed funds and where regulation by the FERC exists, on internally generated funds. The latter is included in Other income (expense) – net below Operating income (loss) in the Consolidated Statement of Income. The rates used by regulated companies are calculated in accordance with FERC rules. Rates used by nonregulated companies are based on our average interest rate on debt.
Employee stock-based awards
We recognize compensation expense on employee stock-based awards, net of estimated forfeitures, on a straight-line basis. (See Note 15 – Stock-Based Compensation.)
Pension and other postretirement benefits
The funded status of each of the pension and other postretirement benefit plans is recognized separately in the Consolidated Balance Sheet as either an asset or liability. The funded status is the difference between the fair value of plan assets and the plan’s benefit obligation. The plans’ benefit obligations and net periodic benefit costs are actuarially determined and impacted by various assumptions and estimates. (See Note 9 – Employee Benefit Plans.)
The discount rates are determined separately for each of our pension and other postretirement benefit plans based on an approach specific to our plans. The year-end discount rates are determined considering a yield curve comprised of high-quality corporate bonds and the timing of the expected benefit cash flows of each plan.
The expected long-term rates of return on plan assets are determined by combining a review of the historical returns within the portfolio, the investment strategy included in the plans’ investment policy statement, and capital market projections for the asset classes in which the portfolio is invested, as well as the weighting of each asset class.
Unrecognized actuarial gains and losses and unrecognized prior service costs and credits are deferred and recorded in accumulated other comprehensive income or, for Transco and Northwest Pipeline, as a regulatory asset or liability, until amortized as a component of net periodic benefit cost. Unrecognized actuarial gains and losses in excess of 10 percent of the greater of the benefit obligation or the market-related value of plan assets are amortized over the participants’ average remaining future years of service, which is approximately 12 years for our pension plans and approximately 8 years for our other postretirement benefit plans. Unrecognized prior service costs and credits for the other postretirement benefit plans are amortized on a straight line basis over the average remaining years of service to eligibility for eligible plan participants, which is approximately 5 years.
The expected return on plan assets component of net periodic benefit cost is calculated using the market-related value of plan assets. For our pension plans, the market-related value of plan assets is equal to the fair value of plan assets adjusted to reflect the amortization of gains or losses associated with the difference between the expected and actual return on plan assets over a 5-year period. Additionally, the market-related value of assets may be no more than 110 percent or less than 90 percent of the fair value of plan assets at the beginning of the year. The market-related value of plan assets for our other postretirement benefit plans is equal to the unadjusted fair value of plan assets at the beginning of the year.
Income taxes
We include the operations of our domestic corporate subsidiaries and income from our domestic subsidiary partnerships in our consolidated federal income tax return and also file tax returns in various foreign and state jurisdictions as required. Deferred income taxes are computed using the liability method and are provided on all temporary differences between the financial basis and the tax basis of our assets and liabilities. Our management’s judgment and income tax assumptions are used to determine the levels, if any, of valuation allowances associated with deferred tax assets.
Earnings (loss) per common share
Basic earnings (loss) per common share in the Consolidated Statement of Income is based on the sum of the weighted-average number of common shares outstanding and vested restricted stock units. Diluted earnings (loss) per common share in the Consolidated Statement of Income includes any dilutive effect of stock options, nonvested restricted stock units, and convertible debt, unless otherwise noted. Beginning in 2012, we have unvested service-based restricted stock units that contain a nonforfeitable right to dividends during the vesting period and are considered participating securities. Basic and diluted earnings (loss) per common share are calculated using the two-class method and the treasury-stock method. Whichever method results in the most dilutive earnings (loss) per common share is reported.
Foreign currency translation
Certain of our foreign subsidiaries use the Canadian dollar as their functional currency. Assets and liabilities of such foreign subsidiaries are translated at the spot rate in effect at the applicable reporting date, and the combined statements of income are translated into the U.S. dollar at the average exchange rates in effect during the applicable period. The resulting cumulative translation adjustment is recorded as a separate component of AOCI.
Transactions denominated in currencies other than the functional currency are recorded based on exchange rates at the time such transactions arise. Subsequent changes in exchange rates when the transactions are settled result in transaction gains and losses which are reflected in the Consolidated Statement of Income.

Acquisitions_Goodwill_and_Othe

Acquisitions Goodwill and Other Intangible Assets	12 Months Ended
	Dec. 31, 2013
Business Combinations [Abstract]	'
Acquisitions Goodwill and Other Intangible Assets [Text Block]	'
	Note 2 – Acquisitions, Goodwill, and Other Intangible Assets
	Business Combinations
	On February 17, 2012, WPZ completed the acquisition of 100 percent of the ownership interests in certain entities from Delphi Midstream Partners, LLC, in exchange for $325 million in cash, net of cash acquired in the transaction, and 7,531,381 WPZ common units valued at $441 million (Laser Acquisition). The fair value of the common units issued as part of the consideration paid was determined on the basis of the closing market price of WPZ’s common units on the acquisition date, adjusted to reflect certain time-based restrictions on resale. The acquired entities primarily own the Laser Gathering System, which is comprised of a natural gas pipeline and associated gathering facilities in the Marcellus Shale in Susquehanna County, Pennsylvania, as well as gathering lines in southern New York.
	On April 27, 2012, WPZ completed the acquisition of 100 percent of the ownership interests in Caiman Eastern Midstream, LLC, from Caiman Energy, LLC in exchange for $1.72 billion in cash and 11,779,296 WPZ common units valued at $603 million (Caiman Acquisition). The fair value of the common units issued as part of the consideration paid was determined on the basis of the closing market price of WPZ’s common units on the acquisition date, adjusted to reflect certain time-based restrictions on resale. The acquired entity operates a gathering and processing business in northern West Virginia, southwestern Pennsylvania, and eastern Ohio. Acquisition transaction costs of $16 million were incurred during 2012 related to the Caiman Acquisition and are reported in Selling, general, and administrative expenses at Williams Partners in the Consolidated Statement of Income.
	The following table presents the allocation of the acquisition-date fair value of the major classes of the net assets, which are included in the Williams Partners segment:
		Laser			Caiman
		(Millions)
	Assets held-for-sale	$	18		$	—
	Other current assets	3			16
	Property, plant, and equipment	158			656
	Intangible assets:
	Customer contracts	316			1,141
	Customer relationships	—			250
	Other	2			2
	Current liabilities	(21		)	(94		)
	Noncurrent liabilities	—			(3		)
	Identifiable net assets acquired	476			1,968
	Goodwill	290			356
		$	766		$	2,324
	Revenues and earnings related to the Laser and Caiman Acquisitions included within the Consolidated Statement of Income in 2012 are not material. Supplemental pro forma revenue and earnings for the pre-acquisition periods reflecting these acquisitions as if they had occurred as of January 1, 2011, are not materially different from the information presented in our accompanying Consolidated Statement of Income (since the historical operations of these acquisitions were insignificant relative to our historical operations) and are, therefore, not presented.
	Goodwill and Other Intangible Assets
	Goodwill
	The Laser and Caiman Acquisitions were accounted for as business combinations which, among other things, require assets acquired and liabilities assumed to be measured at their acquisition-date fair values. The excess of cost over those fair values was recorded as goodwill and allocated to WPZ’s Northeast gathering and processing business (the reporting unit) within the Williams Partners segment. Goodwill recognized in the acquisitions relates primarily to enhancing our strategic platform for expansion in the Marcellus and Utica shale plays in the Appalachian basin area. Substantially all of the goodwill is expected to be deductible for tax purposes. Our annual goodwill impairment review did not result in a goodwill impairment in 2013.
	Other Intangible Assets
	Other intangible assets primarily relate to gas gathering, processing and fractionation contracts and relationships with customers recognized in the Laser and Caiman Acquisitions. The basis for determining the value of these intangible assets was estimated future net cash flows to be derived from acquired customer contracts and relationships, which were offset with appropriate charges for the use of contributory assets and discounted using a risk-adjusted discount rate. The intangible assets are being amortized on a straight-line basis over an initial period of 30 years which represents a portion of the term over which the customer contracts and relationships are expected to contribute to our cash flows.
	The gross carrying amount and accumulated amortization of Other intangible assets at December 31 are as follows:
		2013						2012
		Gross Carrying Amount			Accumulated Amortization			Gross Carrying Amount		Accumulated Amortization
		(Millions)
	Customer contracts	$	1,493		$	(88	)	$	1,493	$	(38	)
	Customer relationships	250			(14		)	250		(6		)
	Other	6			(3		)	6		(1		)
	Total	$	1,749		$	(105	)	$	1,749	$	(45	)
	We expense costs incurred to renew or extend the terms of our gas gathering, processing and fractionation contracts with customers. Based on the estimated future revenues during the contract periods (as estimated at the time of the respective acquisition), the weighted-average periods prior to the next renewal or extension of the customer contracts associated with the Laser and Caiman Acquisitions were approximately 9 years and 18 years, respectively. Although a significant portion of the expected future cash flows associated with these contracts are dependent on our ability to renew or extend the arrangements beyond the initial contract periods, these expected future cash flows are significantly influenced by the scope and pace of our producer customers’ drilling programs. Once producer customers’ wells are connected to our gathering infrastructure, their likelihood of switching to another provider before the wells are abandoned is reduced due to the significant capital investments required.
	The aggregate amortization expense related to Other intangible assets was $60 million, $43 million, and $2 million in 2013, 2012 and 2011, respectively. The estimated amortization expense for each of the next five succeeding fiscal years is approximately $60 million.
	Purchase of Investment
	On December 20, 2012, we purchased an indirect interest in Access GP and limited partner interests in ACMP (collectively referred to as Access Midstream Partners) for approximately $2.19 billion in cash, including transaction costs. We own a 50 percent interest in Access Midstream Ventures, L.L.C., which owns Access GP and its 2 percent general partner interest in ACMP and incentive distribution rights. Also as part of this transaction, we purchased approximately 24 percent of ACMP’s outstanding limited partnership units. ACMP is a publicly traded master limited partnership listed on the New York Stock Exchange that owns, operates, develops, and acquires natural gas gathering systems and other midstream energy assets, which bolsters our position in the Marcellus and Utica shale plays and adds diversity via the Eagle Ford, Haynesville, Barnett, Mid-Continent, and Niobrara areas.
	We account for these acquired interests as equity-method investments. The initial difference between the cost of our investment and our proportional share of the underlying equity in the net assets of Access Midstream Partners of $1.27 billion is primarily related to property, plant, and equipment, as well as customer-based intangible assets and goodwill. The portions of the difference related to the property, plant, and equipment and customer-based intangible assets are being depreciated or amortized as appropriate on a straight-line basis as an adjustment to our equity earnings from the investment in Access Midstream Partners over an initial weighted-average period of approximately 18 years.
	Our investment in Access Midstream Partners is disclosed as a separate reportable segment. See Note 18 – Segment Disclosures.

Variable_Interest_Entities

Variable Interest Entities	12 Months Ended
	Dec. 31, 2013
Variable Interest Entity Disclosures [Abstract]	'
Variable Interest Entity Disclosures [Textblock]	'
	Note 3 – Variable Interest Entities
	Consolidated VIEs
	As of December 31, 2013, we consolidate the following VIEs:
	Gulfstar One
	During the second quarter of 2013, a third party contributed $187 million to Gulfstar One LLC (Gulfstar One) in exchange for a 49 percent ownership interest in Gulfstar One. This contribution was based on 49 percent of WPZ’s estimated cumulative net investment at that time. The $187 million was then distributed to WPZ. Following this transaction, WPZ owns a 51 percent interest in Gulfstar One, a subsidiary that, due to certain risk-sharing provisions in its customer contracts, is a VIE. WPZ is the primary beneficiary because it has the power to direct the activities that most significantly impact Gulfstar One’s economic performance. WPZ, as construction agent for Gulfstar One, is designing, constructing, and installing a proprietary floating-production system, Gulfstar FPS™, and associated pipelines which will initially provide production handling and gathering services for the Tubular Bells oil and gas discovery in the eastern deepwater Gulf of Mexico. The project is expected to be in service in the third quarter of 2014. WPZ has received certain advance payments from the producer customers and is committed to the producer customers to construct this system. The current estimate of the total remaining construction costs is less than $325 million, which will be funded with capital contributions from WPZ and the other equity partner, proportional to ownership interest. The producer customers will be responsible for the firm price of building the facilities if they do not develop the offshore oil and gas fields to be connected to Gulfstar One. In December 2013, WPZ committed an additional $134 million to Gulfstar One to fund an expansion of the system that will provide production handling, gathering, and processing services for the Gunflint oil and gas discovery in the eastern deepwater Gulf of Mexico. The expansion project is expected to be in service in 2016. The other equity partner has an option to participate in the funding of the expansion project on a proportional basis.
	Constitution
	WPZ owns a 41 percent interest in Constitution, a subsidiary that, due to shipper fixed-payment commitments under its firm transportation contracts, is a VIE. WPZ is the primary beneficiary because it has the power to direct the activities that most significantly impact Constitution’s economic performance. WPZ, as construction agent for Constitution, is building a pipeline connecting our gathering system in Susquehanna County, Pennsylvania, to the Iroquois Gas Transmission and the Tennessee Gas Pipeline systems. WPZ plans to place the project in service in late 2015 to 2016 and estimates the total remaining construction costs of the project to be less than $600 million, which will be funded with capital contributions from WPZ and the other equity partners, proportional to ownership interest.
	Bluegrass Pipeline
	We own a 50 percent interest in Bluegrass Pipeline, a subsidiary that, due to insufficient equity to finance activities during its development stage, is a VIE. As of December 31, 2013, we are the primary beneficiary because we have the power to direct the activities of the project that most significantly impact its economic performance until the first developmental stage milestone is met as we have the power to direct whether the project moves forward. We and our partner plan to construct an NGL pipeline connecting processing facilities in the Marcellus and Utica shale-gas areas in the northeastern United States to growing petrochemical and export markets in the gulf coast area of the United States. Pre-construction activities are under way and the project is now planned to be in service in mid-to-late 2016. This development stage entity was operating under a preliminary activities budget that governed the spending levels through February 28, 2014. Prior to that time, certain elections by either partner could change the relative ownership of the entity, impact the continued development of the project, and/or revise the determination of the primary beneficiary. In February 2014, we agreed with our partner to, among other things, extend the preliminary activities period to March 31, 2014, and change certain rights between the partners that could impact the continued development of the project. We will evaluate the impact of those changes on our determination of the primary beneficiary in the first quarter of 2014. The remaining amount for spending under the preliminary activities budget through March 31, 2014, is less than $85 million, and will be funded by us and our partner, proportional to ownership interest. Continued investment in this project beyond the preliminary activities stage will require additional significant capital contributions.
	As of December 31, 2013, our Consolidated Balance Sheet includes approximately $113 million of capitalized project development costs associated with the Bluegrass Pipeline, included within Construction in progress in the table below. Completion of this project is subject to execution of customer contracts sufficient to support the project. We are in discussions with potential customers regarding commitments to the pipeline and these discussions have not yet yielded sufficient commitments to satisfy this condition. As a result, we evaluated the capitalized project costs for impairment as of December 31, 2013, and determined that no impairment was necessary. Our evaluation considered probability-weighted scenarios of undiscounted future net cash flows, including reasonably possible scenarios assuming the construction and operation of the pipeline under differing levels of commitments from customers and the possibility that the project does not proceed. It is reasonably possible that the probability-weighted estimate of undiscounted future net cash flows may change in the near term, resulting in the write-down of this asset to fair value, which could result in all of the capitalized project development costs being expensed. Such changes in estimates could result from lack of sufficient commitments from potential customers, lack of approval of the project by our partner, lack of executed regulatory approvals and unexpected changes in forecasted costs, and other factors impacting project economics.
	The following table presents amounts included in our Consolidated Balance Sheet that are for the use or obligation of these VIEs, which are joint projects in the development and construction phase:
		December 31,
		2013			2012			Classification
		(Millions)
	Assets (liabilities):
	Cash and cash equivalents	$	122		$	8		Cash and cash equivalents
	Construction in progress	1,111			556			Property, plant and equipment, at cost
	Accounts payable	(145		)	(128		)	Accounts payable
	Construction retainage	(3		)	—			Accrued liabilities
	Current deferred revenue	(10		)	—			Accrued liabilities
	Noncurrent deferred revenue associated with customer advance payments	(115		)	(109		)	Other noncurrent liabilities
	Nonconsolidated VIEs
	We have also identified certain interests in VIEs for which we are not the primary beneficiary. These include:
	Laurel Mountain
	WPZ’s 51 percent-owned equity-method investment in Laurel Mountain Midstream, LLC (Laurel Mountain) is considered to be a VIE generally due to contractual provisions that transfer certain risks to customers. As decisions about the activities that most significantly impact the economic performance of this entity require a unanimous vote of all members, WPZ is not the primary beneficiary. Our maximum exposure to loss is limited to the carrying value of this investment, which was $481 million at December 31, 2013.
	Caiman II
	WPZ’s 47.5 percent-owned equity-method investment in Caiman Energy II, LLC (Caiman II) has been determined to be a VIE because it has insufficient equity to finance activities during the construction stage of the Blue Racer Midstream joint project, which is an expansion to gathering and processing and the associated liquids infrastructure serving oil and gas producers in the Utica shale primarily in Ohio and northwest Pennsylvania. WPZ is not the primary beneficiary because it does not have the power to direct the activities of Caiman II that most significantly impact its economic performance. At December 31, 2013, the carrying value of our investment in Caiman II was $256 million, which substantially reflects our contributions to that date. In January 2014, WPZ increased its total commitment for contributions to fund the project from $380 million to $500 million inclusive of contributions made to date, which represents WPZ’s current maximum exposure to loss related to this investment.
	Moss Lake
	Our equity-method investments in Moss Lake Fractionation LLC and Moss Lake LPG Terminal LLC (collectively referred to as Moss Lake) are VIEs because they have insufficient equity to finance activities during their development stage. We currently own 50 percent of these joint projects which plan to construct a new large-scale fractionation plant, expand natural gas liquids storage facilities in Louisiana and construct a pipeline connecting these facilities to the Bluegrass Pipeline. Additionally, Moss Lake plans to construct a new liquefied petroleum gas (LPG) terminal. We are not the primary beneficiary because we do not have the power to direct the majority of the activities of Moss Lake that most significantly impact its economic performance at this stage. The carrying value of our investments in Moss Lake at December 31, 2013, was $12 million, which represents our contributions to date. These development stage entities were operating under a preliminary activities budget that governed the spending levels through February 28, 2014. Prior to that time, certain elections by either partner could change the relative ownership of the entities, impact the continued development of the project, and/or revise the determination of the primary beneficiary. In February 2014, we agreed with our partner to, among other things, extend the preliminary activities period to March 31, 2014, and change certain rights between the partners that could impact the continued development of these projects. We will evaluate the impact of those changes on our determination of the primary beneficiary in the first quarter of 2014. The amount we may spend in order to fund our proportional share of the preliminary activities budget through March 31, 2014, is less than $25 million. Continued investment in this project beyond the preliminary activities stage will require additional significant capital contributions.

Discontinued_Operations

Discontinued Operations	12 Months Ended
	Dec. 31, 2013
Discontinued Operations and Disposal Groups [Abstract]	'
Discontinued Operations	'
	Note 4 – Discontinued Operations
	On December 31, 2011, we completed the tax-free spin-off of our 100 percent interest in WPX to our stockholders. (See Note 1 – Description of Business, Basis of Presentation, and Summary of Significant Accounting Policies.)
	The following table reflects summarized results of discontinued operations. The summarized results of discontinued operations for 2013 reflect an unfavorable ruling associated with our former Alaska refinery related to the Trans-Alaska Pipeline System Quality Bank. The summarized results of discontinued operations for 2012 primarily include a gain on reconsolidation following the sale of certain of our former Venezuela operations, whose facilities were expropriated by the Venezuelan government in May 2009. The summarized results of discontinued operations for 2011 reflect the results of operations of our former exploration and production business as discontinued operations.
	Summarized Results of Discontinued Operations
		Years Ended December 31,
		2013			2012			2011
		(Millions)
	Revenues	$	—		$	—		$	3,997
	Income (loss) from discontinued operations before gain on reconsolidation, impairments, and income taxes	$	(15	)	$	(16	)	$	223
	Gain on reconsolidation	—			144			—
	Impairments	—			—			(755		)
	(Provision) benefit for income taxes	4			8			115
	Income (loss) from discontinued operations	$	(11	)	$	136		$	(417	)
	Income (loss) from discontinued operations:
	Attributable to noncontrolling interests	$	—		$	—		$	10
	Attributable to The Williams Companies, Inc.	$	(11	)	$	136		$	(427	)
	Revenues and Income (loss) from discontinued operations before gain on reconsolidation, impairments, and income taxes for 2011 primarily reflect the results of operations of our discontinued exploration and production business. Results for 2011 additionally include $42 million of transaction costs related to the spin-off.
	Gain on reconsolidation for 2012 is related to our majority ownership in entities (the Wilpro entities) that owned and operated the El Furrial and PIGAP II gas compression facilities prior to their expropriation by the Venezuelan government in May 2009. We deconsolidated the Wilpro entities in 2009. In 2012, the El Furrial and PIGAP II assets were sold as part of a settlement related to the 2009 expropriation of these assets. Upon closing, the lenders that had provided financing for these operations were repaid in full, and the Wilpro entities received $98 million in cash and the right to receive quarterly cash installments of $15 million (receivable) plus interest through the first quarter of 2016.  Following the settlement and repayment in full of the lenders, we reestablished control and, therefore, reconsolidated the Wilpro entities and recognized the gain on reconsolidation. This gain reflected our share of the cash, including cash received in the settlement, and the estimated fair value of the receivable held by the Wilpro entities at the time of reconsolidation. (See Note 16 – Fair Value Measurements, Guarantees, and Concentration of Credit Risk.)
	To determine the fair value of the receivable at the time of reconsolidation, we considered both quantitative (income) and qualitative (market) approaches. Under our quantitative approach, we calculated the net present value of a probability-weighted set of cash flows utilizing assumptions based on contractual terms, historical payment patterns by the counterparty under similar circumstances, our likelihood of using arbitration if the counterparty does not perform, and discount rates. Our qualitative analysis utilized information as to how similar notes might be valued. This analysis also reduced the value due to its limited marketability as the payment terms are embedded within the overall settlement agreement. Both analyses resulted in similar fair values. Ultimately we determined the fair value of the receivable to be $88 million at the time of reconsolidation, utilizing a probability-weighted cash flow analysis with a discount rate of approximately 12 percent and a probability of default ranging from 15 percent to 100 percent. Utilizing different assumptions regarding the collectability of the receivable and discount rates could have resulted in a materially different fair value.
	Impairments in 2011 reflect $367 million and $180 million of impairments of capitalized costs of certain natural gas producing properties of our discontinued exploration and production business in the Powder River basin and the Barnett Shale, respectively, $29 million of write-downs to estimates of fair value less costs to sell the assets of our discontinued exploration and production business in the Arkoma basin, and an impairment of $179 million in connection with the spin-off of WPX to reflect the difference between the carrying value of our investment in WPX and the estimated fair value of WPX at the time of spin-off. (See further discussion below regarding the determination of the fair value of WPX.) These nonrecurring fair value measurements fell within Level 3 of the fair value hierarchy.
	For our assessment of the carrying value of our natural gas producing properties, we utilized estimates of future cash flows, in certain cases including purchase offers received. Significant judgments and assumptions in these assessments include estimates of natural gas reserve quantities, estimates of future natural gas prices using a forward NYMEX curve adjusted for locational basis differentials, drilling plans, expected capital costs, and an applicable discount rate commensurate with risk of the underlying cash flow estimates.
	(Provision) benefit for income taxes for 2011 includes a $26 million net tax benefit associated with the write-down of certain indebtedness related to our former power operations.
	Impairment of our investment in WPX
	In conjunction with accounting for the spin-off of WPX, we evaluated whether there was an indicator of impairment of the carrying value of the investment at the date of the spin-off. Because the market capitalization of WPX as determined by its closing stock price on December 30, 2011, pursuant to the “when issued” trading market was less than our investment in WPX, we determined that an indicator of impairment was present and conducted an evaluation of the fair value of our investment in WPX at the date of the spin-off.
	To determine the fair value at the time of spin-off, we considered several valuation approaches to derive a range of fair value estimates. These included consideration of the “when issued” stock price at December 30, 2011, an income approach, and a market approach. While the “when issued” stock price approach utilized the most observable inputs of the three approaches, we noted that the short trading duration, low trading volumes, and lack of liquidity in the “when issued” market, among other factors, served to limit this input in being solely determinative of the fair value of WPX. As such, we also considered the other valuation approaches in estimating the overall fair value of WPX, though giving preferential weighting to the “when issued” stock price approach.
	Key variables and assumptions included the application of a control premium of up to 30 percent to the December 30, 2011 “when issued” trading value based on transactions involving energy companies. For the income approach, we estimated the fair value of WPX using a discounted cash flow analysis of its oil and natural gas reserves, primarily adjusted for long-term debt. Implicit in this approach was the use of forward market prices and discount rates that considered the risk of the respective reserves. After-tax discount rates assumed to be used by market participants were an average of 11.25 percent for proved reserves, 13.25 percent to 15.25 percent for probable reserves, and 15.25 percent to 18.25 percent for possible reserves. For the market approach, we considered multiples of cash flows derived from the value of comparable companies utilizing their respective traded stock prices, adjusted for a control premium consistent with levels noted above. Using these methodologies, we computed a range of estimated fair values from $4.5 billion to $6.7 billion. After giving preferential weighting to the “when issued” valuation, we computed an estimated fair value of approximately $5.5 billion.
	As a result of this evaluation, we recorded an impairment charge which is nondeductible for tax purposes. This amount served to reduce the investment basis of the net assets accounted for as a dividend upon the spin-off at December 31, 2011.
	Energy Commodity Derivatives Gains and Losses
	The following table presents pre-tax gains and losses for our former exploration and production business’ energy commodity derivatives.
		Year Ended			Classification
		December 31, 2011
		(Millions)
	Designated as cash flow hedges:
	Net gain (loss) recognized in other comprehensive income (loss) (effective portion)	$	413		AOCI
	Net gain (loss) reclassified from accumulated other comprehensive income (loss) into income (effective portion)	$	332		Income (loss) from
					discontinued
					operations
	Not designated as cash flow hedges:
	Gain (loss) recognized in income	$	30		Income (loss) from
					discontinued
					operations

Investing_Activities

Investing Activities	12 Months Ended
	Dec. 31, 2013
Investing Activities [Abstract]	'
Investing Activities [Text Block]	'
	Note 5 – Investing Activities
	Investing Income
		Years Ended December 31,
		2013			2012			2011
		(Millions)
	Equity earnings (losses) (1)	$	134		$	111		$	155
	Income (loss) from investments (1)	28			49			7
	Interest income and other	53			28			6
	Total investing income	$	215		$	188		$	168
	__________
	-1	Items also included in Segment profit (loss). (See Note 18 – Segment Disclosures.)
	Equity earnings (losses)
	In December 2012, we acquired certain interests in Access Midstream Partners for approximately $2.19 billion in cash. (See Note 2 – Acquisitions, Goodwill, and Other Intangible Assets.) Equity earnings (losses) in 2013 includes $93 million of equity earnings recognized from Access Midstream Partners, offset by $63 million noncash amortization of the difference between the cost of our investment and our underlying share of the net assets of Access Midstream Partners.
	Income (loss) from investments
	Included in Income (loss) from investments for 2013 is a $31 million gain resulting from Access Midstream Partners’ equity issuances during 2013. These equity issuances resulted in the dilution of our limited partner interest from approximately 24 percent to 23 percent, which is accounted for as though we sold a portion of our investment.
	In 2010, we sold our 50 percent interest in Accroven SRL (Accroven) to the state-owned oil company, Petróleos de Venezuela S.A. (PDVSA). Income (loss) from investments in 2012 and 2011 includes gains of $53 million and $11 million, respectively, from the sale. Payments were recognized upon receipt, as future collections were not reasonably assured.
	Interest income and other
	Interest income and other includes $50 million and $7 million of interest income for 2013 and 2012, respectively, associated with a receivable related to the sale of certain former Venezuela assets. (See Note 4 – Discontinued Operations). The 2013 amount reflects a current year increase in yield associated with a revision in our estimate of the cash flows expected to be received as a result of continued timely payment by the counterparty.
	Additionally, Interest income and other for 2012 includes $10 million of interest related to the 2010 sale of Accroven discussed above.
	Investments
		December 31,
		2013			2012
		(Millions)
	Equity method:
	Access Midstream Partners — 24%	$	2,161		$	2,187
	Overland Pass Pipeline Company LLC (OPPL) — 50%	452			454
	Gulfstream — 50%	333			348
	Discovery Producer Services LLC (Discovery) — 60% (1)	527			350
	Laurel Mountain — 51% (1)	481			444
	Caiman II — 47.5%	256			67
	Other	150			137
		$	4,360		$	3,987
	_________
	-1	We account for these investments under the equity method due to the significant participatory rights of our partners such that we do not control or are otherwise not the primary beneficiary of the investments.
	Related party transactions
	We have purchases from our equity-method investees included in Product costs in the Consolidated Statement of Income of $161 million, $186 million, and $234 million for the years ended 2013, 2012, and 2011, respectively. We have $13 million and $15 million included in Accounts payable in the Consolidated Balance Sheet with our equity-method investees at December 31, 2013 and 2012, respectively.
	WPZ has operating agreements with certain equity-method investees. These operating agreements typically provide for reimbursement or payment to WPZ for certain direct operational payroll and employee benefit costs, materials, supplies, and other charges and also for management services. We supplied a portion of these services, primarily those related to employees since WPZ does not have any employees, to certain equity-method investees. The total gross charges to equity-method investees for these fees included in the Consolidated Statement of Income are $67 million, $75 million and $57 million for the years ended 2013, 2012, and 2011, respectively.
	Equity-method investments
	We have differences between the carrying value of our equity-method investments and the underlying equity in the net assets of the investees of $1.13 billion at December 31, 2013. This difference primarily relates to our investment in Access Midstream Partners resulting from property, plant, and equipment, as well as customer-based intangible assets and goodwill. (See Note 2 – Acquisitions, Goodwill, and Other Intangible Assets.)
	We generally fund our portion of significant expansion or development projects of these investees, except for Access Midstream Partners which is expected to be self-funding, through additional capital contributions. As of December 31, 2013, our proportionate share of amounts remaining to be spent for specific capital projects already in progress for Discovery, Laurel Mountain, and Caiman II totaled $244 million, $72 million, and $119 million, respectively.
	We contributed $193 million and $169 million to Discovery in 2013 and 2012, respectively; $42 million, $174 million, and $137 million to Laurel Mountain in 2013, 2012 and 2011, respectively; and $192 million and $69 million, to Caiman II in 2013 and 2012, respectively.
	Our equity-method investees’ organizational documents generally require distribution of available cash to equity holders on a quarterly basis. Dividends and distributions, including those presented below, received from companies accounted for by the equity method were $247 million, $173 million, and $193 million in 2013, 2012, and 2011, respectively. These transactions reduced the carrying value of our investments. These dividends and distributions primarily included:
		2013			2012			2011
		(Millions)
	Access Midstream Partners	$	93		$	—		$	—
	Gulfstream	81			79			84
	Discovery	12			21			40
	Aux Sable Liquid Products L.P.	20			28			35
	OPPL	27			28			19
	Summarized Financial Position and Results of Operations of All Equity-Method Investments
		December 31,
		2013			2012
		(Millions)
	Assets (liabilities):
	Current assets	$	689		$	582
	Noncurrent assets	13,621			11,571
	Current liabilities	(573		)	(507		)
	Noncurrent liabilities	(4,563		)	(3,807		)
	Noncontrolling interest	(254		)	(112		)
		Years Ended December 31,
		2013			2012			2011
		(Millions)
	Gross revenue	$	2,406		$	1,821		$	1,808
Operating income	699			557			747
Net income	627			488			654

Other_Income_and_Expense

Other Income and Expense	12 Months Ended
	Dec. 31, 2013
Other Income and Expenses [Abstract]	'
Other Income and Expense	'
	Note 6 – Other Income and Expenses
	The following table presents significant gains or losses reflected in Other (income) expense – net within Costs and expenses:
		Years Ended December 31,
		2013			2012			2011
		(Millions)
	Williams Partners
	Net insurance recoveries associated with the Geismar Incident	$	(40	)	$	—		$	—
	Amortization of regulatory assets associated with asset retirement obligations	30			7			6
	Write-off of the Eminence abandonment regulatory asset not recoverable through rates	12			—			—
	Insurance recoveries associated with the Eminence abandonment	(16		)	—			—
	Settlement in principle of a producer claim	25			—			—
	Project feasibility costs	4			21			10
	Capitalization of project feasibility costs previously expensed	(1		)	(19		)	(11		)
	Williams NGL & Petchem Services
	Gulf Liquids litigation contingency accrual reduction (see Note 17)	—			—			(19		)
	Write-off of an abandoned project	20			—			—
	The reversals of project feasibility costs from expense to capital at Williams Partners are associated with natural gas pipeline expansion projects. These reversals were made upon determining that the related projects were probable of development. These costs are now included in the capital costs of the projects, which we believe are probable of recovery through the project rates.
	On June 13, 2013, an explosion and fire occurred at WPZ’s Geismar olefins plant. The fire was extinguished on the day of the incident. The incident (Geismar Incident) rendered the facility temporarily inoperable and resulted in significant human, financial and operational effects.
	We have substantial insurance coverage for repair and replacement costs, lost production, and additional expenses related to the incident as follows:
	•	Property damage and business interruption coverage with a combined per-occurrence limit of $500 million and retentions (deductibles) of $10 million per occurrence for property damage and a waiting period of 60 days per occurrence for business interruption;
	•	General liability coverage with per-occurrence and aggregate annual limits of $610 million and retentions (deductibles) of $2 million per occurrence;
	•	Workers’ compensation coverage with statutory limits and retentions (deductibles) of $1 million total per occurrence.
	We have expensed $13 million at Williams Partners during 2013 of costs under our insurance deductibles in Operating and maintenance expenses in the Consolidated Statement of Income. Recoveries under our business interruption policy will be recognized upon resolution of any contingencies with the insurer associated with the claim. Through December 31, 2013, we have recognized $50 million of insurance recoveries related to this incident as a gain to Other (income) expense – net within Costs and expenses in our Consolidated Statement of Income. During the fourth quarter of 2013, we incurred $10 million of covered insurable expenses in excess of our retentions (deductibles) which partially offset the $50 million gain included in Other (income) expense – net within Costs and expenses in our Consolidated Statement of Income.
	Additional Items
	We detected a leak in an underground cavern at our Eminence Storage Field in Mississippi on December 28, 2010. We recorded $3 million, $2 million, and $15 million of charges to Operating and maintenance expenses at Williams Partners during 2013, 2012, and 2011, respectively, primarily related to assessment and monitoring costs incurred to ensure the safety of the surrounding area.
	We engaged a consulting firm in 2012 to assist in better aligning resources to support our business strategy following the spin-off of WPX. In 2012, we recorded $26 million of reorganization-related costs, including consulting costs, to Selling, general, and administrative expenses.
	In conjunction with the Gulf Liquids litigation contingency accrual reduction noted in the table above, Williams NGL & Petchem Services also reduced an accrual for the associated interest of $14 million in 2011, which is reflected in Interest incurred. (See Note 17 – Contingent Liabilities and Commitments.)
	In conjunction with the completion of a tender offer for a portion of our debt in the fourth quarter of 2011, we incurred $271 million of Early debt retirement costs, consisting primarily of cash premiums.

Provision_Benefit_for_Income_T

Provision (Benefit) for Income Taxes	12 Months Ended
	Dec. 31, 2013
Income Tax Disclosure [Abstract]	'
Provision (Benefit) for Income Taxes	'
	Note 7 – Provision (Benefit) for Income Taxes
	The Provision (benefit) for income taxes from continuing operations includes:
		Years Ended December 31,
		2013			2012			2011
		(Millions)
	Current:
	Federal	$	(17	)	$	91		$	181
	State	7			17			13
	Foreign	(13		)	40			(6		)
		(23		)	148			188
	Deferred:
	Federal	348			220			(61		)
	State	40			(13		)	(14		)
	Foreign	36			5			11
		424			212			(64		)
	Total provision (benefit)	$	401		$	360		$	124
	Reconciliations from the Provision (benefit) for income taxes from continuing operations at the federal statutory rate to the recorded Provision (benefit) for income taxes are as follows:
		Years Ended December 31,
		2013			2012			2011
		(Millions)
	Provision (benefit) at statutory rate	$	378		$	451		$	421
	Increases (decreases) in taxes resulting from:
	Impact of nontaxable noncontrolling interests	(78		)	(72		)	(96		)
	State income taxes (net of federal benefit)	26			2			11
	Foreign operations — net	(32		)	(36		)	(14		)
	Federal settlements	—			—			(109		)
	International revised assessments	—			—			(38		)
	Taxes on undistributed earnings of foreign subsidiaries - net	99			—			(66		)
	Other — net	8			15			15
	Provision (benefit) for income taxes	$	401		$	360		$	124
	The 2013 state deferred provision includes $10 million, net of federal benefit, related to the impact of a second-quarter Texas franchise tax law change.
	Income (loss) from continuing operations before income taxes includes $119 million, $196 million, and $173 million of foreign income in 2013, 2012, and 2011, respectively.
	On October 30, 2013, WPZ announced its intent to pursue an agreement to acquire certain of our Canadian operations.  As a result, we no longer consider the undistributed earnings from these foreign operations to be permanently reinvested and thus recognized $99 million of deferred income tax expense in continuing operations and $24 million of deferred tax benefit in AOCI during the fourth quarter of 2013. As a result of this transaction, we estimate approximately $111 million will be characterized as a current income tax liability in the first quarter of 2014.
	During the third quarter of 2011, associated with a ruling received from the Internal Revenue Service (IRS) related to our plan to separate our exploration and production business through an initial public offering and subsequent tax-free spin-off, and following a certain internal reorganization, we recognized a deferred tax benefit of $66 million as we considered the undistributed earnings of certain foreign operations to be permanently reinvested.
	During the course of audits of our business by domestic and foreign tax authorities, we frequently face challenges regarding the amount of taxes due. These challenges include questions regarding the timing and amount of deductions and the allocation of income among various tax jurisdictions. In evaluating the liability associated with our various filing positions, we apply the two step process of recognition and measurement. In association with this liability, we record an estimate of related interest and tax exposure as a component of our tax provision. The impact of this accrual is included within other — net in our reconciliation of the tax provision to the federal statutory rate.
	Significant components of deferred tax liabilities and deferred tax assets are as follows:
		December 31,
		2013			2012
		(Millions)
	Deferred tax liabilities:
	Property, plant, and equipment	$	102		$	72
	Undistributed earnings of foreign subsidiaries	75			—
	Investments	3,663			3,146
	Other	—			34
	Total deferred tax liabilities	3,840			3,252
	Deferred tax assets:
	Accrued liabilities	126			313
	Federal tax credits	108			74
	State losses and credits	194			195
	Other	91			90
	Total deferred tax assets	519			672
	Less valuation allowance	181			144
	Net deferred tax assets	338			528
	Overall net deferred tax liabilities	$	3,502		$	2,724
	The valuation allowance at December 31, 2013 and 2012 serves to reduce the available deferred tax assets to an amount that will, more likely than not, be realized. The amounts presented in the table above are, with respect to state items, before any federal benefit. The change from prior year for the state losses and credits is primarily due to increases in losses and credits generated in the current and prior years less losses and credits utilized in the current year. We have loss and credit carryovers in multiple state taxing jurisdictions. These attributes generally expire between 2014 and 2033 with some carryovers having indefinite carryforward periods. In the case of the valuation allowance, the change is due to the ongoing evaluation process of the losses and credits anticipated to be realized in future years. The federal tax credits currently have no expiration dates.
	During 2013, we received cash refunds (net of payments) for income taxes of $50 million. Cash payments for income taxes (net of refunds and including discontinued operations) were $198 million and $296 million in 2012 and 2011, respectively.
	As of December 31, 2013, we had approximately $66 million of unrecognized tax benefits. If recognized, income tax expense would be reduced by $70 million, including the effect of these changes on other tax attributes, with state income tax amounts included net of federal tax effect. A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows:
		2013			2012
		(Millions)
	Balance at beginning of period	$	58		$	38
	Additions based on tax positions related to the current year	4			4
	Additions for tax positions of prior years	18			22
	Reductions for tax positions of prior years	(2		)	(6		)
Settlement with taxing authorities	(12		)	—
Balance at end of period	$	66		$	58
We recognize related interest and penalties as a component of income tax provision. Total interest and penalties recognized as part of income tax provision were expense of $9 million for 2013, and benefits of $7 million and $56 million for 2012 and 2011, respectively. Approximately $16 million and $7 million of interest and penalties primarily relating to uncertain tax positions have been accrued as of December 31, 2013 and 2012, respectively.
During the next 12 months, we do not expect ultimate resolution of any unrecognized tax benefit associated with domestic or international matters to have a material impact on our unrecognized tax benefit position.
During the first quarter of 2011, we finalized settlements for 1997 through 2008 on certain contested matters with the IRS that resulted in a 2011 tax benefit of approximately $109 million. In July and August 2011, we made cash payments to the IRS of $82 million and $77 million, respectively, related to these settlements. During the first and fourth quarters of 2011, we received revised assessments on an international matter that resulted in a 2011 tax benefit of approximately $38 million. In the first quarter of 2012, we received a cash refund for the revised assessments of $21 million.
During the first quarter of 2013, we finalized a settlement with the IRS on tax matters related to the IRS’s examination of our 2009 and 2010 consolidated corporate income tax returns. We recorded a tax provision of approximately $2 million related to these matters during the third quarter of 2012. With respect to the examined years, we made cash payments of $12 million to the IRS in February 2013.
Tax years after 2010 are subject to examination by the IRS. The statute of limitations for most states expires one year after expiration of the IRS statute. Generally, tax returns for our Venezuelan and Canadian entities are open to audit for tax years after 2007, although Venezuela is subject to certain contractual limitations. A reassessment of a Canadian audit for the years 2007 through 2010 is still outstanding as of December 31, 2013. The impact of this reassessment is not expected to be material.
On September 13, 2013, the IRS issued final regulations providing guidance on the treatment of amounts paid to acquire, produce or improve tangible property and proposed regulations providing guidance on the dispositions of such property. The implementation date for these regulations is January 1, 2014. Changes for tax treatment elected by us or required by the regulations will generally be effective prospectively; however, implementation of many of the regulations’ provisions will require a calculation of the cumulative effect of the changes on prior years, and it is expected that such amount will have to be included in the determination of our taxable income in 2014, or possibly over a four-year period beginning in 2014. The IRS is expected to issue additional procedural guidance regarding 2014 tax return filing requirements and how the requirements may be implemented for the gas transmission and distribution industry. Since the changes will affect the timing for deducting expenditures for tax purposes, the impact of implementation will be reflected in the amount of income taxes payable or receivable, cash flows from operations and deferred taxes beginning in 2014, with no net tax provision effect. Pending the issuance of additional procedural guidance from the IRS, we cannot at this time estimate the impact of implementing the regulations.
With the spin-off of WPX on December 31, 2011, WPX entered into a tax sharing agreement with us under which we are generally liable for all U.S. federal, state, local and foreign income taxes attributable to WPX with respect to taxable periods ending on or before the distribution date. We are also principally responsible for managing any income tax audits by the various tax jurisdictions for pre-spin-off periods. In 2012, we prepared pro forma tax returns for each tax period in which WPX or any of its subsidiaries were combined or consolidated with us. In the first quarter of 2013, we reimbursed WPX a net $2 million for the additional losses shown on the pro forma tax returns, offset by a reduction in the tax resulting from the 2009 to 2010 IRS settlement.

Earnings_Loss_Per_Common_Share

Earnings (Loss) Per Common Share from Continuing Operations	12 Months Ended
	Dec. 31, 2013
Earnings Per Share [Abstract]	'
Earnings Per Common Share from Continuing Operations	'
	Note 8 – Earnings (Loss) Per Common Share from Continuing Operations
		Years Ended December 31,
		2013		2012		2011
		(Dollars in millions, except per-share
		amounts; shares in thousands)
	Income (loss) from continuing operations attributable to The Williams Companies, Inc. available to common stockholders for basic and diluted earnings (loss) per common share	$	441	$	723	$	803
	Basic weighted-average shares	682,948		619,792		588,553
	Effect of dilutive securities:
	Nonvested restricted stock units	1,995		2,694		4,332
	Stock options	2,149		2,608		3,374
	Convertible debentures	93		392		1,916
	Diluted weighted-average shares	687,185		625,486		598,175
	Earnings (loss) per common share from continuing operations:
	Basic	$	0.65	$	1.17	$	1.36
	Diluted	$	0.64	$	1.15	$	1.34
	Beginning in 2012, we have nonvested service-based restricted stock units that contain a nonforfeitable right to dividends during the vesting period and are considered participating securities. Dividends associated with these participating securities were $2 million and $1 million for 2013 and 2012, respectively, and have been subtracted from Income (loss) from continuing operations attributable to The Williams Companies, Inc. available to common stockholders for basic and diluted earnings (loss) per common share in the calculation of earnings (loss) per common share.

Employee_Benefit_Plans

Employee Benefit Plans	12 Months Ended
	Dec. 31, 2013
Compensation and Retirement Disclosure [Abstract]	'
Employee Benefit Plans	'
	Note 9 – Employee Benefit Plans
	We have noncontributory defined benefit pension plans in which all eligible employees participate. Currently, eligible employees earn benefits primarily based on a cash balance formula. Various other formulas, as defined in the plan documents, are utilized to calculate the retirement benefits for plan participants not covered by the cash balance formula. At the time of retirement, participants may elect, to the extent they are eligible for the various options, to receive annuity payments, a lump sum payment, or a combination of a lump sum and annuity payments. In addition to our pension plans, we currently provide subsidized retiree medical and life insurance benefits (other postretirement benefits) to certain eligible participants. Generally, employees hired after December 31, 1991, are not eligible for the subsidized retiree medical benefits, except for participants that were employees or retirees of Transco Energy Company on December 31, 1995, and other miscellaneous defined participant groups. For the periods presented, certain of these other postretirement benefit plans, particularly the subsidized retiree medical benefit plans, provide for retiree contributions and contain other cost-sharing features such as deductibles, co-payments, and co-insurance. The accounting for these plans anticipates future cost-sharing that is consistent with our expressed intent to increase the retiree contribution level generally in line with health care cost increases. Effective January 1, 2014, subsidized retiree medical benefits for eligible participants age 65 and older will be paid through contributions to health reimbursement accounts. The impact of this plan change is reflected in the December 31, 2013, other postretirement benefit obligation.
	Funded Status
	The following table presents the changes in benefit obligations and plan assets for pension benefits and other postretirement benefits for the years indicated.
		Pension Benefits								Other
										Postretirement
										Benefits
		2013				2012				2013				2012
		(Millions)
	Change in benefit obligation:
	Benefit obligation at beginning of year	$	1,549			$	1,441			$	331			$	339
	Service cost	44				39				2				3
	Interest cost	51				55				11				13
	Plan participants’ contributions	—				—				6				5
	Benefits paid	(87		)		(75		)		(19		)		(20		)
	Medicare Part D subsidy	—				—				4				3
	Plan amendment	—				—				(59		)		(6		)
	Actuarial loss (gain)	(173		)		98				(63		)		(6		)
	Settlements	—				(9		)		—				—
	Benefit obligation at end of year	1,384				1,549				213				331
	Change in plan assets:
	Fair value of plan assets at beginning of year	1,071				965				175				159
	Actual return on plan assets	165				111				31				18
	Employer contributions	92				79				8				13
	Plan participants’ contributions	—				—				6				5
	Benefits paid	(87		)		(75		)		(19		)		(20		)
	Settlements	—				(9		)		—				—
	Fair value of plan assets at end of year	1,241				1,071				201				175
	Funded status — underfunded	$	(143	)		$	(478	)		$	(12	)		$	(156	)
	Accumulated benefit obligation	$	1,359			$	1,519
	The underfunded status of our pension plans and other postretirement benefit plans presented in the previous table are recognized in the Consolidated Balance Sheet within the following accounts:
		December 31,
		2013				2012
		(Millions)
	Underfunded pension plans:
	Current liabilities	$	1			$	3
	Noncurrent liabilities	142				475
	Underfunded other postretirement benefit plans:
	Current liabilities	8				8
	Noncurrent liabilities	4				148
	The plan assets within our other postretirement benefit plans are intended to be used for the payment of benefits for certain groups of participants. The Current liabilities for the other postretirement benefit plans represent the current portion of benefits expected to be payable in the subsequent year for the groups of participants whose benefits are not expected to be paid from plan assets.
	The pension plans’ benefit obligation Actuarial loss (gain) of $(173) million in 2013 and $98 million in 2012 are primarily due to the impact of changes in the discount rates utilized to calculate the benefit obligations. In 2013, these rates increased, while in 2012 these rates decreased, as compared to those of the preceding year.
	The 2013 benefit obligation Actuarial loss (gain) of $(63) million for our other postretirement benefit plans is primarily due to the impact of an increase in the discount rates utilized to calculate the benefit obligation as well as favorable claims experience. The Plan amendment for the other postretirement benefit plans of $(59) million in 2013 reflects a change in the plans to provide subsidized retiree medical benefits through defined annual contributions to health reimbursement accounts for eligible participants age 65 and older effective January 1, 2014. The 2012 benefit obligation Actuarial loss (gain) of $(6) million for our other postretirement benefit plans is primarily due to changes to claims experience and health care cost trend rates, offset by the impact of a decrease in the discount rates utilized to calculate the benefit obligation.
	At December 31, 2013 and 2012, all of our pension plans had a projected benefit obligation and accumulated benefit obligation in excess of plan assets.
	Pre-tax amounts not yet recognized in Net periodic benefit cost at December 31 are as follows:
		Pension Benefits								Other
										Postretirement
										Benefits
		2013				2012				2013				2012
		(Millions)
	Amounts included in Accumulated other comprehensive income (loss):
	Prior service (cost) credit	$	—			$	(1	)		$	26			$	7
	Net actuarial loss	(491		)		(828		)		(11		)		(35		)
	Amounts included in regulatory assets/liabilities associated with Transco and Northwest Pipeline:
	Prior service credit	N/A				N/A				$	42			$	14
	Net actuarial loss	N/A				N/A				(2		)		(67		)
	In addition to the regulatory assets/liabilities included in the previous table, differences in the amount of actuarially determined Net periodic benefit cost for our other postretirement benefit plans and the other postretirement benefit costs recovered in rates for Transco and Northwest Pipeline are deferred as a regulatory asset or liability. We have regulatory liabilities of $44 million at December 31, 2013 and $38 million at December 31, 2012 related to these deferrals. These amounts will be reflected in future rates based on the rate structures of these gas pipelines.
	Net Periodic Benefit Cost
	Net periodic benefit cost for the years ended December 31 consist of the following:
		Pension Benefits												Other
														Postretirement  Benefits
		2013				2012				2011				2013				2012			2011
		(Millions)
Components of net periodic benefit cost:
Service cost	$	44			$	39			$	41			$	2			$	3		$	2
Interest cost	51				55				64				11				13			15
Expected return on plan assets	(61		)		(64		)		(77		)		(9		)		(9		)	(10		)
Amortization of prior service cost (credit)	1				1				1				(12		)		(7		)	(11		)
Amortization of net actuarial loss	60				53				38				4				8			3
Net actuarial loss from settlements	—				5				4				—				—			—
Reclassification to regulatory liability	—				—				—				2				—			1
Net periodic benefit cost	$	95			$	89			$	71			$	(2	)		$	8		$	—
Included in Net periodic benefit cost in 2011 in the previous table is cost associated with active and former employees that supported WPX’s operations (See Note 4 – Discontinued Operations). This cost was directly charged to WPX and is included in Income (loss) from discontinued operations. These amounts totaled $8 million in 2011 for our pension plans and totaled less than $1 million in 2011 for our other postretirement benefit plans.
Items Recognized in Other Comprehensive Income (Loss) and Regulatory Assets/Liabilities
Other changes in plan assets and benefit obligations recognized in Other comprehensive income (loss) before taxes for the years ended December 31 consist of the following:
	Pension Benefits												Other
													Postretirement  Benefits
	2013				2012				2011				2013				2012			2011
	(Millions)
Other changes in plan assets and benefit obligations recognized in Other comprehensive income (loss):
Net actuarial gain (loss)	$	277			$	(51	)		$	(220	)		$	23			$	2		$	(21	)
Prior service credit	—				—				—				23				2			2
Amortization of prior service cost (credit)	1				1				1				(4		)		(3		)	(4		)
Amortization of net actuarial loss and loss from settlements	60				58				42				1				3			1
Other changes in plan assets and benefit obligations recognized in Other comprehensive income (loss)	$	338			$	8			$	(177	)		$	43			$	4		$	(22	)
Other changes in plan assets and benefit obligations for our other postretirement benefit plans associated with Transco and Northwest Pipeline are recognized in regulatory assets/liabilities. Amounts recognized in regulatory assets/ liabilities for the years ended December 31 consist of the following:
		2013				2012				2011
		(Millions)
Net actuarial gain (loss)		$	62			$	13			$	(39	)
Prior service credit		36				4				1
Amortization of prior service credit		(8		)		(4		)		(7		)
Amortization of net actuarial loss		3				5				2
Pre-tax amounts expected to be amortized in Net periodic benefit cost in 2014 are as follows:
	Pension				Other
	Benefits				Postretirement
					Benefits
	(Millions)
Amounts included in Accumulated other comprehensive income (loss):
Prior service cost (credit)	$	—			$	(8	)
Net actuarial loss	38				—
Amounts included in regulatory assets/liabilities associated with Transco and Northwest Pipeline:
Prior service credit	N/A				$	(12	)
Net actuarial loss	N/A				—
Key Assumptions
The weighted-average assumptions utilized to determine benefit obligations as of December 31 are as follows:
	Pension Benefits						Other
							Postretirement
							Benefits
	2013			2012			2013			2012
Discount rate	4.68	%		3.43	%		4.8	%		3.77	%
Rate of compensation increase	4.56			4.57			N/A			N/A
The weighted-average assumptions utilized to determine Net periodic benefit cost for the years ended December 31 are as follows:
	Pension Benefits									Other
										Postretirement  Benefits
	2013			2012			2011			2013			2012			2011
Discount rate	3.43	%		3.98	%		5.19	%		3.97	%		4.22	%		5.35	%
Expected long-term rate of return on plan assets	5.9			6.3			7.5			5.26			5.71			6.54
Rate of compensation increase	4.57			4.52			5			N/A			N/A			N/A
The increase in discount rates from December 31, 2012 to December 31, 2013 is primarily due to the general market increase in yields on long-term, high-quality corporate debt securities. The expected long-term rates of return on plan assets assumptions decreased in 2013 as a result of a decrease in the forward-looking capital market projections.
The mortality assumptions used to determine the obligations for our pension and other postretirement benefit plans are the estimate of expected mortality rates for the participants in these plans. The selected mortality tables are among the most recent tables available and include projected mortality improvements.
The assumed health care cost trend rate for 2014 is 7.2 percent. This rate decreases to 5.0 percent by 2023. A one-percentage-point change in assumed health care cost trend rates would have the following effects:
	Point increase				Point decrease
	(Millions)
Effect on total of service and interest cost components	$	1			$	(1	)
Effect on other postretirement benefit obligation	7				(6		)
Plan Assets
The investment policy for our pension and other postretirement benefit plans provides for an investment strategy in accordance with the Employee Retirement Income Security Act (ERISA), which governs the investment of the assets in a diversified portfolio. The plans follow a policy of diversifying the investments across various asset classes and investment managers. Additionally, the investment returns on approximately 40 percent of the other postretirement benefit plan assets are subject to income tax; therefore, certain investments are managed in a tax efficient manner.
The pension plans’ target asset allocation range at December 31, 2013 was 54 percent to 66 percent equity securities, which includes the commingled investment funds invested in equity securities, and 36 percent to 44 percent fixed income securities, including the fixed income commingled investment fund, and cash management funds. Within equity securities, the target range for U.S. equity securities is 37 percent to 45 percent and international equity securities is 17 percent to 21 percent. The asset allocation continues to be weighted toward equity securities since the obligations of the pension and other postretirement benefit plans are long-term in nature and historically equity securities have outperformed other asset classes over long periods of time.
Equity security investments are restricted to high-quality, readily marketable securities that are actively traded on the major U.S. and foreign national exchanges. Investment in Williams’ securities or an entity in which Williams has a majority ownership is prohibited in the pension plans except where these securities may be owned in a commingled investment fund in which the plans’ trusts invest. No more than 5 percent of the total stock portfolio valued at market may be invested in the common stock of any one corporation.
The following securities and transactions are not authorized: unregistered securities, commodities or commodity contracts, short sales or margin transactions, or other leveraging strategies. Investment strategies using the direct holding of options or futures require approval and, historically, have not been used; however, these instruments may be used in commingled investment funds. Additionally, real estate equity and natural resource property investments are generally restricted.
Fixed income securities are generally restricted to high-quality, marketable securities that may include, but are not necessarily limited to, U.S. Treasury securities, U.S. government guaranteed and nonguaranteed mortgage-backed securities, government and municipal bonds, and investment grade corporate securities. The overall rating of the fixed income security assets is generally required to be at least “A,” according to the Moody’s or Standard & Poor’s rating systems. No more than 5 percent of the total fixed income portfolio may be invested in the fixed income securities of any one issuer with the exception of bond index funds and U.S. government guaranteed and agency securities.
During 2013, ten active investment managers and one passive investment manager managed substantially all of the pension plans’ funds and four active investment managers and one passive investment manager managed the other postretirement benefit plans’ funds. Each of the managers had responsibility for managing a specific portion of these assets and each investment manager was responsible for 1 percent to 15 percent of the assets.
The pension and other postretirement benefit plans’ assets are held primarily in equity securities, including commingled investment funds invested in equity securities, and fixed income securities, including a commingled fund invested in fixed income securities. Within the plans’ investment securities, there are no significant concentrations of risk because of the diversity of the types of investments, diversity of the various industries, and the diversity of the fund managers and investment strategies. Generally, the investments held in the plans are publicly traded, therefore, minimizing liquidity risk in the portfolio.
The fair values of our pension plan assets at December 31, 2013 and 2012 by asset class are as follows:
	2013
	Quoted Prices				Significant				Significant				Total
	in Active				Other				Unobservable
	Markets for				Observable				Inputs
	Identical				Inputs				(Level 3)
	Assets				(Level 2)
	(Level 1)
	(Millions)
Pension assets:
Cash management fund	$	23			$	—			$	—			$	23
Equity securities:
U.S. large cap	211				—				—				211
U.S. small cap	146				—				—				146
International developed markets large cap growth	—				59				—				59
Preferred stock	2				—				—				2
Commingled investment funds:
Equities — U.S. large cap (1)	—				179				—				179
Equities — International small cap (2)	—				24				—				24
Equities — Emerging markets value (3)	—				34				—				34
Equities — Emerging markets growth (4)	—				19				—				19
Equities — International developed markets large cap value (5)	—				100				—				100
Fixed income — Corporate bonds (6)	—				140				—				140
Fixed income securities (7):
U.S. Treasury securities	30				—				—				30
Mortgage-backed securities	—				67				—				67
Corporate bonds	—				200				—				200
Insurance company investment contracts and other	—				7				—				7
Total assets at fair value at December 31, 2013	$	412			$	829			$	—			$	1,241
	2012
	Quoted Prices				Significant				Significant				Total
	in Active				Other				Unobservable
	Markets for				Observable				Inputs
	Identical				Inputs				(Level 3)
	Assets				(Level 2)
	(Level 1)
	(Millions)
Pension assets:
Cash management fund	$	21			$	—			$	—			$	21
Equity securities:
U.S. large cap	169				—				—				169
U.S. small cap	115				—				—				115
International developed markets large cap growth	1				61				—				62
Emerging markets growth	3				18				—				21
Preferred stock	6				—				—				6
Commingled investment funds:
Equities — U.S. large cap (1)	—				146				—				146
Equities — Emerging markets value (3)	—				33				—				33
Equities — International developed markets large cap value (5)	—				83				—				83
Fixed income — Corporate bonds (6)	—				150				—				150
Fixed income securities (7):
U.S. Treasury securities	22				—				—				22
Mortgage-backed securities	—				68				—				68
Corporate bonds	—				171				—				171
Insurance company investment contracts and other	—				4				—				4
Total assets at fair value at December 31, 2012	$	337			$	734			$	—			$	1,071
The fair values of our other postretirement benefits plan assets at December 31, 2013 and 2012 by asset class are as follows:
	2013
	Quoted Prices				Significant				Significant				Total
	in Active				Other				Unobservable
	Markets for				Observable				Inputs
	Identical				Inputs				(Level 3)
	Assets				(Level 2)
	(Level 1)
	(Millions)
Other postretirement benefit assets:
Cash management funds	$	13			$	—			$	—			$	13
Equity securities:
U.S. large cap	52				—				—				52
U.S. small cap	29				—				—				29
International developed markets large cap growth	—				15				—				15
Emerging markets growth	1				1				—				2
Commingled investment funds:
Equities — U.S. large cap (1)	—				18				—				18
Equities — International small cap (2)	—				2				—				2
Equities — Emerging markets value (3)	—				4				—				4
Equities — Emerging markets growth (4)	—				2				—				2
Equities — International developed markets large cap value (5)	—				10				—				10
Fixed income — Corporate bonds (6)	—				14				—				14
Fixed income securities (8):
U.S. Treasury securities	3				—				—				3
Government and municipal bonds	—				10				—				10
Mortgage-backed securities	—				7				—				7
Corporate bonds	—				20				—				20
Total assets at fair value at December 31, 2013	$	98			$	103			$	—			$	201
	2012
	Quoted Prices				Significant				Significant				Total
	in Active				Other				Unobservable
	Markets for				Observable				Inputs
	Identical				Inputs				(Level 3)
	Assets				(Level 2)
	(Level 1)
	(Millions)
Other postretirement benefit assets:
Cash management funds	$	14			$	—			$	—			$	14
Equity securities:
U.S. large cap	42				—				—				42
U.S. small cap	21				—				—				21
International developed markets large cap growth	—				13				—				13
Emerging markets growth	1				4				—				5
Preferred stock	1				—				—				1
Commingled investment funds:
Equities — U.S. large cap (1)	—				15				—				15
Equities — Emerging markets value (3)	—				3				—				3
Equities — International developed markets large cap value (5)	—				9				—				9
Fixed income — Corporate bonds (6)	—				15				—				15
Fixed income securities (8):
U.S. Treasury securities	2				—				—				2
Government and municipal bonds	—				10				—				10
Mortgage-backed securities	—				7				—				7
Corporate bonds	—				18				—				18
Total assets at fair value at December 31, 2012	$	81			$	94			$	—			$	175
____________
-1	The stated intent of this fund is to invest primarily in equity securities comprising the Standard & Poor’s 500 Index. The investment objective of the fund is to approximate the performance of the Standard & Poor’s 500 Index over the long term. The fund manager retains the right to restrict withdrawals from the fund so as not to disadvantage other investors in the fund.
-2	The stated intent of this fund is to invest in equity securities of international small capitalization companies for the purpose of capital appreciation. The fund invests primarily in equity securities of non-U.S. issuers and other Depository Receipts listed on globally recognized exchanges. The fund may also invest up to 15 percent of its net asset value in emerging markets. The plans’ trustee is required to notify the fund manager 10 days prior to a withdrawal from the fund. For any redemption made within 180 days of contribution, the fund reserves the right to charge a 1.5 percent redemption fee. The fund also reserves the right to make all or a portion of redemptions in-kind rather than in cash or in a combination of cash and in-kind.
-3	The stated intent of this fund is to invest in equity securities of international emerging markets for the purpose of capital appreciation. The fund invests primarily in common stocks in the financial, consumer goods, information technology, energy, telecommunications, materials, and industrial sectors. The plans’ trustee is required to notify the fund manager 10 days prior to a withdrawal from the fund. The fund manager retains the right to restrict withdrawals from the fund so as not to disadvantage other investors in the fund.
-4	The stated intent of this fund is to invest mainly in equity securities of emerging market companies, or those companies that derive a significant portion of their revenues or profits from emerging economies for the purpose of long-term capital growth. The plans’ trustee is required to notify the fund manager 15 days prior to a withdrawal from the fund as of the last day of any month. The fund reserves the right to suspend and compel withdrawals. The fund also reserves the right to make all or a portion of redemptions in-kind rather than in cash or in a combination of cash and in-kind.
-5	The stated intent of this fund is to invest in a diversified portfolio of international equity securities for the purpose of capital appreciation. The fund invests primarily in common stocks in the consumer goods, financial, health care, industrial, materials, energy, and information technology sectors. The plans’ trustee is required to notify the fund manager 10 days prior to a withdrawal from the fund. The fund manager retains the right to restrict withdrawals from the fund so as not to disadvantage other investors in the fund.
-6	The stated intent of this fund is to invest in U.S. Corporate bonds and U.S. Treasury securities. The fund is managed to closely match the characteristics of a long-term corporate bond index fund and seeks to maintain an average credit quality target of A- or above and a maximum 10 percent allocation to BBB rated securities. The fund’s target duration is approximately 20 years. The trustee of the fund reserves the right to delay the processing of deposits or withdrawals in order to ensure that securities transactions will be carried out in an orderly manner.
-7	The weighted-average credit quality rating of the pension assets fixed income security portfolio is investment grade with a weighted-average duration of approximately 6 years for 2013 and 2012.
-8	The weighted-average credit quality rating of the other postretirement benefit assets fixed income security portfolio is investment grade with a weighted-average duration of approximately 5 years for 2013 and 2012.
The fair value measurement level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement of an asset.
Shares of the cash management funds are valued at fair value based on published market prices as of the close of business on the last business day of the year, which represents the net asset values of the shares held.
The fair values of equity securities traded on U.S. exchanges are derived from quoted market prices as of the close of business on the last business day of the year. The fair values of equity securities traded on foreign exchanges are also derived from quoted market prices as of the close of business on an active foreign exchange on the last business day of the year. However, the valuation requires translation of the foreign currency to U.S. dollars and this translation is considered an observable input to the valuation.
The fair value of all commingled investment funds are determined based on the net asset values per unit of each of the funds. The net asset values per unit represent the aggregate value of the funds assets at fair value less liabilities, divided by the number of units outstanding.
The fair value of fixed income securities, except U.S. Treasury notes and bonds, are determined using pricing models. These pricing models incorporate observable inputs such as benchmark yields, reported trades, broker/dealer quotes, and issuer spreads for similar securities to determine fair value. The U.S. Treasury notes and bonds are valued at fair value based on closing prices on the last business day of the year reported in the active market in which the security is traded.
The investment contracts with insurance companies are valued at fair value by discounting the cash flow of a bond using a yield to maturity based on an investment grade index or comparable index with a similar maturity value, maturity period, and nominal coupon rate.
There have been no significant changes in the preceding valuation methodologies used at December 31, 2013 and 2012. Additionally, there were no transfers or reclassifications of investments between Level 1 and Level 2 from December 2012 to December 2013. If transfers between levels had occurred, the transfers would have been recognized as of the end of the period.
Plan Benefit Payments and Employer Contributions
Following are the expected benefits to be paid by the plans. These estimates are based on the same assumptions previously discussed and reflect future service as appropriate. The actuarial assumptions are based on long-term expectations and include, but are not limited to, assumptions as to average expected retirement age and form of benefit payment. Actual benefit payments could differ significantly from expected benefit payments if near-term participant behaviors differ significantly from the actuarial assumptions.
	Pension				Other
	Benefits				Postretirement
					Benefits
	(Millions)
2014	$	88			$	15
2015	96				15
2016	102				16
2017	103				16
2018	109				17
2019-2023	591				74
In 2014, we expect to contribute approximately $60 million to our tax-qualified pension plans and approximately $3 million to our nonqualified pension plans, for a total of approximately $63 million, and approximately $8 million to our other postretirement benefit plans.
Defined Contribution Plans
We also maintain defined contribution plans for the benefit of substantially all of our employees. Generally, plan participants may contribute a portion of their compensation on a pre-tax and after-tax basis in accordance with the plans’ guidelines. We match employees’ contributions up to certain limits. Our matching contributions charged to expense were $27 million in 2013, $25 million in 2012, and $28 million in 2011. Included in 2011 is $5 million in matching contributions for employees that supported WPX’s operations that were directly charged to WPX and included in Income (loss) from discontinued operations.

Inventories

Inventories	12 Months Ended
	Dec. 31, 2013
Inventory, Net [Abstract]	'
Inventories	'
	Note 10 – Inventories
		December 31,
		2013		2012
		(Millions)
	Natural gas liquids, olefins, and natural gas in underground storage	$	111	$	97
	Materials, supplies, and other	83		78
		$	194	$	175

Property_Plant_and_Equipment

Property, Plant and Equipment	12 Months Ended
	Dec. 31, 2013
Property, Plant and Equipment [Abstract]	'
Property, Plant and Equipment [Textblock]	'
	Note 11 – Property, Plant, and Equipment
		Estimated		Depreciation
		Useful Life  (1)		Rates (1)	December 31,
		(Years)		(%)	2013			2012
					(Millions)
	Nonregulated:
	Natural gas gathering and processing facilities	May-40			$	9,185		$	7,727
	Construction in progress	Not applicable			3,123			1,997
	Other	3 - 45			1,316			1,103
	Regulated:
	Natural gas transmission facilities			1.20 - 6.97	10,633			9,963
	Construction in progress			Not applicable	273			337
	Other			1.35 - 33.33	1,293			1,419
	Total property, plant, and equipment, at cost				25,823			22,546
	Accumulated depreciation and amortization				(7,613		)	(7,079		)
	Property, plant, and equipment — net				$	18,210		$	15,467
	__________
	-1	Estimated useful life and depreciation rates are presented as of December 31, 2013. Depreciation rates for regulated assets are prescribed by the FERC.
	Depreciation and amortization expense for Property, plant, and equipment – net was $752 million in 2013, $712 million in 2012, and $658 million in 2011.
	Regulated Property, plant, and equipment – net includes approximately $785 million and $825 million at December 31, 2013 and 2012, respectively, related to amounts in excess of the original cost of the regulated facilities within our gas pipeline businesses as a result of our prior acquisitions. This amount is being amortized over 40 years using the straight-line amortization method. Current FERC policy does not permit recovery through rates for amounts in excess of original cost of construction.
	Asset Retirement Obligations
	Our accrued obligations relate to underground storage caverns, offshore platforms, fractionation and compression facilities, gas gathering well connections and pipelines, and gas transmission facilities. At the end of the useful life of each respective asset, we are legally obligated to plug storage caverns and remove any related surface equipment, to restore land and remove surface equipment at gas processing, fractionation and compression facilities, to dismantle offshore platforms, to cap certain gathering pipelines at the wellhead connection and remove any related surface equipment, and to remove certain components of gas transmission facilities from the ground.
	The following table presents the significant changes to our asset retirement obligations (ARO), of which $497 million and $511 million are included in Other noncurrent liabilities with the remaining current portion in Accrued liabilities at December 31, 2013 and 2012, respectively.
		December 31,
		2013			2012
		(Millions)
	Beginning balance	$	579		$	573
	Liabilities incurred	8			8
	Liabilities settled (1)	(31		)	(44		)
	Accretion expense	53			43
	Revisions (2)	(48		)	(1		)
	Ending balance	$	561		$	579
	______________
	-1	For 2013 and 2012, liabilities settled include $25 million and $31 million, respectively, related to the abandonment of certain of Transco’s natural gas storage caverns that are associated with a leak in 2010.
	-2	Several factors are considered in the annual review process, including inflation rates, current estimates for removal cost, discount rates, and the estimated remaining life of the assets. The 2013 revision primarily reflects increases in the estimated remaining useful life of the assets. The 2012 revision primarily reflects a decrease in removal cost estimates. The 2013 and 2012 revisions also include increases of $9 million and $13 million, respectively, related to changes in the timing and method of abandonment on certain of Transco’s natural gas storage caverns that were associated with a leak in 2010.
	Transco is entitled to collect in rates the amounts necessary to fund its ARO. All funds received for such retirements are deposited into an external trust account dedicated to funding its ARO (ARO Trust). (See Note 16 – Fair Value Measurements, Guarantees, and Concentration of Credit Risk.) Under its current rate settlement, Transco’s annual funding obligation is approximately $36 million, with installments to be deposited monthly.

Accrued_Liabilities

Accrued Liabilities	12 Months Ended
	Dec. 31, 2013
Accrued Liabilities, Current [Abstract]	'
Accrued Liabilities [Text Block]	'
	Note 12 – Accrued Liabilities
		December 31,
		2013		2012
		(Millions)
	Interest on debt	$	167	$	148
	Employee costs	127		137
	Estimated rate refund liability	98		—
	Asset retirement obligations	64		68
	Other, including other loss contingencies	341		275
		$	797	$	628

Debt_Banking_Arrangements_and_

Debt, Banking Arrangements, and Leases	12 Months Ended
	Dec. 31, 2013
Debt Disclosure [Abstract]	'
Debt Disclosure [Text Block]	'
	Note 13 – Debt, Banking Arrangements, and Leases
	Long-Term Debt
		December 31,
		2013			2012
		(Millions)
	Unsecured:
	Transco:
	6.4% Notes due 2016	$	200		$	200
	6.05% Notes due 2018	250			250
	7.08% Debentures due 2026	8			8
	7.25% Debentures due 2026	200			200
	5.4% Notes due 2041	375			375
	4.45% Notes due 2042	400			400
	Northwest Pipeline:
	7% Notes due 2016	175			175
	5.95% Notes due 2017	185			185
	6.05% Notes due 2018	250			250
	7.125% Debentures due 2025	85			85
	WPZ:
	3.8% Notes due 2015	750			750
	7.25% Notes due 2017	600			600
	5.25% Notes due 2020	1,500			1,500
	4.125% Notes due 2020	600			600
	4% Notes due 2021	500			500
	3.35% Notes due 2022	750			750
	4.5% Notes due 2023	600			—
	6.3% Notes due 2040	1,250			1,250
	5.8% Notes due 2043	400			—
	Credit facility loans	—			375
	The Williams Companies, Inc.:
	7.875% Notes due 2021	371			371
	3.7% Notes due 2023	850			850
	7.5% Debentures due 2031	339			339
	7.75% Notes due 2031	252			252
	8.75% Notes due 2032	445			445
	Various — 5.5% to 10.25% Notes and Debentures due 2019 to 2033	55			57
	Other, including secured capital lease obligations	1			2
	Net unamortized debt discount	(37		)	(33		)
	Total long-term debt, including current portion	11,354			10,736
	Long-term debt due within one year	(1		)	(1		)
	Long-term debt	$	11,353		$	10,735
	Certain of our debt agreements contain covenants that restrict or limit, among other things, our ability to create liens supporting indebtedness, sell assets, and incur additional debt. Default of these agreements could also restrict our ability to make certain distributions or repurchase equity.
	The following table presents aggregate minimum maturities of long-term debt (excluding net unamortized discount) for each of the next five years:
		December 31, 2013
		(Millions)
	2014	$	—
	2015	750
	2016	375
	2017	785
	2018	500
	Issuances and retirements
	In November 2013, WPZ completed a public offering of $600 million of 4.5 percent senior unsecured notes due 2023 and $400 million of 5.8 percent senior unsecured notes due 2043. WPZ used the net proceeds to repay amounts outstanding under its commercial paper program, to fund capital expenditures, and for general partnership purposes.
	In December 2012, we completed a public offering of $850 million of 3.7 percent senior unsecured notes due 2023. We used the net proceeds to finance a portion of our investment in Access Midstream Partners.
	In August 2012, WPZ completed a public offering of $750 million of 3.35 percent senior unsecured notes due 2022. WPZ used the net proceeds to repay outstanding borrowings on its senior unsecured revolving credit facility and for general partnership purposes.
	In July 2012, Transco issued $400 million of 4.45 percent senior unsecured notes due 2042 to investors in a private debt placement. An offer to exchange these unregistered notes for substantially identical new notes that are registered under the Securities Act of 1933, as amended, was commenced in November 2012 and completed in December 2012. A portion of the proceeds from the issuance of these notes was used to repay Transco’s $325 million of 8.875 percent senior unsecured notes that matured on July 15, 2012.
	Credit Facilities
	On July 31, 2013, we amended our $900 million and WPZ’s $2.4 billion credit facilities to increase the aggregate commitments to $1.5 billion and $2.5 billion, respectively and extend the maturity dates for both credit facilities to July 31, 2018. Additionally, Transco and Northwest Pipeline are each able to borrow up to $500 million under the amended WPZ credit facility to the extent not otherwise utilized by the other co-borrowers. Both credit facilities may also, under certain conditions, be increased up to an additional $500 million. As a result of the modifications, the previously deferred fees and costs related to these facilities are being amortized over the term of the new arrangements.
	At December 31, 2013, letter of credit capacity under our $1.5 billion and WPZ’s $2.5 billion credit facilities is $700 million and $1.3 billion, respectively. At December 31, 2013, no letters of credit have been issued and no loans are outstanding on these credit facilities. We have issued letters of credit totaling $16 million as of December 31, 2013, under certain bilateral bank agreements.
	Our significant financial covenants require our ratio of debt to EBITDA (each as defined in the credit facility) to be no greater than 4.5 to 1. For the fiscal quarter and the two following fiscal quarters in which one or more acquisitions for a total aggregate purchase price equal to or greater than $50 million has been executed, we are required to maintain a ratio of debt to EBITDA of no greater than 5 to 1. At December 31, 2013, we are in compliance with these financial covenants.
	WPZ's significant financial covenants require its ratio of debt to EBITDA (each as defined in the credit facility) to be no greater than 5 to 1. For the fiscal quarter and the two following fiscal quarters in which one or more acquisitions for a total aggregate purchase price equal to or greater than $50 million has been executed, WPZ is required to maintain a ratio of debt to EBITDA of no greater than 5.5 to 1. In addition, the ratio of debt to capitalization (defined as net worth plus debt) must be no greater than 65 percent for each of Transco and Northwest Pipeline. At December 31, 2013, WPZ is in compliance with these financial covenants.
	The credit agreements governing our and WPZ’s respective credit facilities both contain the following terms and conditions:
	•	Each time funds are borrowed, the applicable borrower may choose from two methods of calculating interest: a fluctuating base rate equal to Citibank N.A.’s alternate base rate plus an applicable margin or a periodic fixed rate equal to LIBOR plus an applicable margin. The applicable borrower is required to pay a commitment fee (currently 0.225 percent for our agreement and 0.175 percent for the WPZ agreement) based on the unused portion of its respective credit facility. The applicable margin and the commitment fee are determined for each borrower by reference to a pricing schedule based on such borrower’s senior unsecured long-term debt ratings.
	•	Various covenants may limit, among other things, a borrower’s and its material subsidiaries’ ability to grant certain liens supporting indebtedness, a borrower’s ability to merge or consolidate, sell all or substantially all of its assets, enter into certain affiliate transactions, make certain distributions during an event of default, make investments, and allow any material change in the nature of its business.
•	If an event of default with respect to a borrower occurs under its respective credit facility, the lenders will be able to terminate the commitments for the respective borrowers and accelerate the maturity of any loans of the defaulting borrower under the respective credit facility agreement and exercise other rights and remedies.
Commercial Paper Program
In March 2013, WPZ initiated a commercial paper program. The program allows a maximum outstanding amount at any time of $2 billion of unsecured commercial paper notes. The maturities of the commercial paper notes vary but may not exceed 397 days from the date of issuance. The commercial paper notes are sold under customary terms in the commercial paper market and are issued at a discount from par, or, alternatively, are sold at par and bear varying interest rates on a fixed or floating basis. Proceeds from these notes are used for general partnership purposes, including funding capital expenditures, working capital, and partnership distributions. We classify WPZ’s commercial paper outstanding in Current liabilities in the Consolidated Balance Sheet, as the outstanding notes at December 31, 2013, have maturity dates less than three months from the date of issuance. At December 31, 2013, WPZ has $225 million in Commercial paper outstanding at a weighted average interest rate of 0.42 percent.
Cash Payments for Interest (Net of Amounts Capitalized)
Cash payments for interest (net of amounts capitalized) were $472 million in 2013, $479 million in 2012, and $573 million in 2011.
Restricted Net Assets of Subsidiaries
We have considered the guidance in the Securities and Exchange Commission’s Regulation S-X related to restricted net assets of subsidiaries. In accordance with Rule 4-08(e) of Regulation S-X, we have determined that certain net assets of our subsidiaries are considered restricted under this guidance and exceed 25 percent of our consolidated net assets. Substantially all of these restricted net assets relate to the net assets of WPZ, which are technically considered restricted under this accounting rule due to terms within WPZ’s partnership agreement that govern the partnership’s assets. Our interest in WPZ’s net assets at December 31, 2013 was $6.5 billion.
Leases-Lessee
The future minimum annual rentals under noncancelable operating leases, are payable as follows:
	December 31, 2013
	(Millions)
2014	$	53
2015	47
2016	43
2017	36
2018	30
Thereafter	123
Total	$	332
Under our right-of-way agreement with the Jicarilla Apache Nation, we make annual payments of approximately $8 million and an additional annual payment which varies depending on the prior year’s per-unit NGL margins and the volume of gas gathered by our gathering facilities subject to the agreement. Depending primarily on the per-unit NGL margins for any given year, the additional annual payments could exceed the fixed amount. This agreement expires March 31, 2029.
Total rent expense was $58 million in 2013, $56 million in 2012, and $49 million in 2011.

Stockholders_Equity

Stockholders' Equity	12 Months Ended
	Dec. 31, 2013
Stockholders' Equity Note [Abstract]	'
Stockholders' Equity	'
	Note 14 – Stockholders' Equity
	Cash dividends declared per common share were $1.4375, $1.19625 and $.775 for 2013, 2012, and 2011, respectively.
	In April 2012, we issued approximately 30 million shares of common stock in a public offering at a price of $30.59 per share. We used the net proceeds of $887 million to fund a portion of the purchase of additional WPZ common units in connection with WPZ's Caiman Acquisition. (See Note 2 – Acquisitions, Goodwill, and Other Intangible Assets.)
	In December 2012, we issued approximately 53 million shares of common stock in a public offering at a price of $31 per share. We used the net proceeds of $1.6 billion to fund a portion of the purchase of an equity interest in ACMP. (See Note 2 – Acquisitions, Goodwill, and Other Intangible Assets.)
	We maintain a Stockholder Rights Plan, as amended and restated on September 21, 2004, and further amended May 18, 2007 and October 12, 2007, under which each outstanding share of our common stock has a right (as defined in the plan) attached. Under certain conditions, each right may be exercised to purchase, at an exercise price of $50 (subject to adjustment), one two-hundredth of a share of Series A Junior Participating Preferred Stock. The rights may be exercised only if an Acquiring Person acquires (or obtains the right to acquire) 15 percent or more of our common stock or commences an offer for 15 percent or more of our common stock. The plan contains a mechanism to divest of shares of common stock if such stock in excess of 14.9 percent was acquired inadvertently or without knowledge of the terms of the rights. The rights, which until exercised do not have voting rights, expire in September 2014 and may be redeemed at a price of $.01 per right prior to their expiration, or within a specified period of time after the occurrence of certain events. In the event a person becomes the owner of more than 15 percent of our common stock, each holder of a right (except an Acquiring Person) shall have the right to receive, upon exercise, our common stock having a value equal to two times the exercise price of the right. In the event we are engaged in a merger, business combination, or 50 percent or more of our assets, cash flow or earnings power is sold or transferred, each holder of a right (except an Acquiring Person) shall have the right to receive, upon exercise, common stock of the acquiring company having a value equal to two times the exercise price of the right.
	AOCI
	The following table presents the changes in AOCI by component, net of income taxes:
		Cash				Foreign			Pension and			Total
		Flow				Currency			Other Post
		Hedges				Translation			Retirement
									Benefits
		(Millions)
	Balance at December 31, 2012	$	(1	)		$	169		$	(530	)	$	(362	)
	Other comprehensive income (loss) before reclassifications	1				(41		)	203			163
	Amounts reclassified from accumulated other comprehensive income (loss)	(1		)		—			36			35
	Other comprehensive income (loss)	—				(41		)	239			198
	Balance at December 31, 2013	$	(1	)		$	128		$	(291	)	$	(164	)
	Reclassifications out of AOCI are presented in the following table by component for the year ended December 31, 2013:
	Component		Reclassifications				Classification
			(Millions)
	Cash flow hedges:
	Energy commodity contracts		$	(1	)		Product sales
	Total cash flow hedges		(1		)
	Pension and other postretirement benefits:
	Amortization of prior service cost (credit) included in net periodic benefit cost		(3		)		Note 9 – Employee Benefit Plans
	Amortization of actuarial (gain) loss included in net periodic benefit cost		61				Note 9 – Employee Benefit Plans
	Total pension and other postretirement benefits		58
	Reclassifications before income tax		57
	Income tax benefit		(22		)		Provision (benefit) for income taxes
	Reclassifications during the period		$	35

StockBased_Compensation

Stock-Based Compensation	12 Months Ended
	Dec. 31, 2013
Share-based Compensation [Abstract]	'
Stock-Based Compensation	'
	Note 15 – Stock-Based Compensation
	Plan Information
	On May 17, 2007, our stockholders approved a plan that provides common-stock-based awards to both employees and nonmanagement directors and reserved 19 million new shares for issuance. On May 20, 2010, our stockholders approved an amendment and restatement of the 2007 plan to increase by 11 million the number of new shares authorized for making awards under the plan, among other changes. The plan permits the granting of various types of awards including, but not limited to, restricted stock units and stock options. At December 31, 2013, 24 million shares of our common stock were reserved for issuance pursuant to existing and future stock awards, of which 14 million shares were available for future grants.
	Additionally, on May 17, 2007, our stockholders approved an Employee Stock Purchase Plan (ESPP) which authorizes up to 2 million new shares of our common stock to be available for sale under the plan. The ESPP enables eligible participants to purchase our common stock through payroll deductions not exceeding an annual amount of $15,000 per participant. The ESPP provides for offering periods during which shares may be purchased and continues until the earliest of (1) the Board of Directors terminates the ESPP, (2) the sale of all shares available under the ESPP, or (3) the tenth anniversary of the date the Plan was approved by the stockholders. Offering periods are from January through June and from July through December. Generally, all employees are eligible to participate in the ESPP, with the exception of executives and international employees. The number of shares eligible for an employee to purchase during each offering period is limited to 750 shares. The purchase price of the stock is 85 percent of the lower closing price of either the first or the last day of the offering period. The ESPP requires a one-year holding period before the stock can be sold. Employees purchased 203 thousand shares at an average price of $27.62 per share during 2013. Approximately 413 thousand shares were available for purchase under the ESPP at December 31, 2013.
	Total stock-based compensation expense for the years ended December 31, 2013, 2012, and 2011 was $37 million, $36 million, and $52 million, respectively, of which $18 million is included in Income (loss) from discontinued operations for 2011. Total income tax benefit recognized related to the total stock-based compensation expense for the years ended December 31, 2013, 2012, and 2011 was $14 million, $13 million, and $19 million, respectively. Measured but unrecognized stock-based compensation expense at December 31, 2013, was $44 million, which does not include the effect of estimated forfeitures of $1 million. This amount is comprised of $4 million related to stock options and $40 million related to restricted stock units. These amounts are expected to be recognized over a weighted-average period of 1.8 years.
	Stock Options
	Stock options are valued at the date of award, which does not precede the approval date. The purchase price per share for stock options may not be less than the market price of the underlying stock on the date of grant. Stock options generally become exercisable over a three-year period from the date of grant. Stock options generally expire ten years after the grant.
	The following summary reflects stock option activity and related information for the year ended December 31, 2013:
	Stock Options	Options			Weighted-				Aggregate
					Average				Intrinsic
					Exercise				Value
					Price
		(Millions)							(Millions)
	Outstanding at December 31, 2012	6.9			$	19.1
	Granted	0.9			$	33.57
	Exercised	(1.1	)		$	13.34
	Outstanding at December 31, 2013	6.7			$	21.82			$	112
	Exercisable at December 31, 2013	5			$	18.7			$	98
	The total intrinsic value of options exercised during the years ended December 31, 2013, 2012, and 2011 was $23 million, $69 million, and $55 million, respectively; and the tax benefit realized was $9 million, $25 million, and $21 million, respectively. Cash received from stock option exercises was $13 million, $50 million, and $45 million during 2013, 2012, and 2011, respectively. The weighted-average remaining contractual life for stock options outstanding and exercisable at December 31, 2013, was 5.1 years and 3.9 years, respectively.
	The estimated fair value at date of grant of options for our common stock granted in each respective year, using the Black-Scholes option pricing model, is as follows:
		2013				2012				2011
	Weighted-average grant date fair value of options for our common stock granted during the year, per share	$	5.94			$	5.65			$	6.28
	Weighted-average assumptions:
	Dividend yield	4.3		%		3.7		%		3.6		%
	Volatility	29.7		%		30		%		34.6		%
	Risk-free interest rate	1.4		%		1.3		%		2.8		%
	Expected life (years)	6.5				6.5				6.5
	The expected dividend yield is based on the 2013 dividend forecast and the grant-date market price of our stock. As a result of the 2011 spin-off of WPX, the historical volatility of our stock is not expected to be as representative of expected future volatility. Expected volatility is now based on the average of our peer group 10-year historical volatility adjusted by a ratio of our implied volatility to the average of our peer group’s implied volatility. The adjustment is made because the difference in implied volatility between our peer group and us may indicate that we are expected to be more volatile than our peer group average. The risk-free interest rate is based on the U.S. Treasury Constant Maturity rates as of the grant date. The expected life of the option is based on historical exercise behavior and expected future experience.
	Nonvested Restricted Stock Units
	The following summary reflects nonvested restricted stock unit activity and related information for the year ended December 31, 2013.
	Restricted Stock Units Outstanding	Shares			Weighted-
					Average
					Fair Value*
		(Millions)
	Nonvested at December 31, 2012	3.9			$	22.49
	Granted	1.2			$	30.43
	Forfeited	(0.1	)		$	27.27
	Vested	(1.5	)		$	17.82
	Nonvested at December 31, 2013	3.5			$	27.16
	______________
	*	Performance-based shares are valued utilizing a Monte Carlo valuation method using measures of total shareholder return. All other shares are valued at the grant-date market price or the grant-date market price less dividends projected to be paid over the vesting period. Restricted stock units generally vest after three years.
	Value of Restricted Stock Units	2013				2012				2011
	Weighted-average grant date fair value of restricted stock units granted during the year, per share	$	30.43			$	20.61			$	23.31
	Total fair value of restricted stock units vested during the year ($’s in millions)	$	27			$	22			$	35
	Performance-based shares granted under the Plan represent 32 percent of nonvested restricted stock units outstanding at December 31, 2013. These grants may be earned at the end of a three-year period based on actual performance against a performance target. Based on the extent to which certain financial targets are achieved, vested shares may range from zero percent to 200 percent of the original grant amount.

Fair_Value_Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2013
Fair Value Disclosures [Abstract]	'
Fair Value Measurements	'
	Note 16 – Fair Value Measurements, Guarantees, and Concentration of Credit Risk
	The following table presents, by level within the fair value hierarchy, certain of our financial assets and liabilities. The carrying values of cash and cash equivalents, accounts receivable, commercial paper, and accounts payable approximate fair value because of the short-term nature of these instruments. Therefore, these assets and liabilities are not presented in the following table.
								Fair Value Measurements Using
		Carrying			Fair			Quoted		Significant			Significant
		Amount			Value			Prices In		Other			Unobservable
								Active		Observable			Inputs
								Markets for		Inputs			(Level 3)
								Identical		(Level 2)
								Assets
								(Level 1)
		(Millions)
	Assets (liabilities) at December 31, 2013:
	Measured on a recurring basis:
	ARO Trust investments	$	33		$	33		$	33	$	—		$	—
	Energy derivatives assets not designated as hedging instruments	3			3			—		—			3
	Energy derivatives liabilities not designated as hedging instruments	(3		)	(3		)	—		(1		)	(2		)
	Additional disclosures:
	Notes receivable and other	77			140			1		6			133
	Long-term debt (1)	(11,353		)	(11,971		)	—		(11,971		)	—
	Guarantee	(32		)	(29		)	—		(29		)	—
	Assets (liabilities) at December 31, 2012:
	Measured on a recurring basis:
	ARO Trust investments	$	18		$	18		$	18	$	—		$	—
	Energy derivatives assets not designated as hedging instruments	5			5			—		—			5
	Energy derivatives liabilities not designated as hedging instruments	(1		)	(1		)	—		—			(1		)
	Additional disclosures:
	Notes receivable and other	95			138			2		8			128
	Long-term debt (1)	(10,734		)	(12,388		)	—		(12,388		)	—
	Guarantee	(33		)	(31		)	—		(31		)	—
	________________
	(1) Excludes capital leases
	Fair Value Methods
	We use the following methods and assumptions in estimating the fair value of our financial instruments:
	Assets and liabilities measured at fair value on a recurring basis
	ARO Trust investments:  Transco deposits a portion of its collected rates, pursuant to its rate case settlement, into an external trust that is specifically designated to fund future asset retirement obligations. The ARO Trust invests in a portfolio of actively traded mutual funds that are measured at fair value on a recurring basis based on quoted prices in an active market, is classified as available-for-sale, and is reported in Regulatory assets, deferred charges, and other in the Consolidated Balance Sheet. Both realized and unrealized gains and losses are ultimately recorded as regulatory assets or liabilities.
	Energy derivatives:  Energy derivatives include commodity based exchange-traded contracts and over-the-counter (OTC) contracts, which consist of physical forwards, futures, and swaps that are measured at fair value on a recurring basis. The fair value amounts are presented on a gross basis and do not reflect the netting of asset and liability positions permitted under the terms of our master netting arrangements. Further, the amounts do not include cash held on deposit in margin accounts that we have received or remitted to collateralize certain derivative positions. Energy derivatives assets are reported in Other current assets and deferred charges and Regulatory assets, deferred charges, and other in the Consolidated Balance Sheet. Energy derivatives liabilities are reported in Accrued liabilities and Other noncurrent liabilities in the Consolidated Balance Sheet.
	Reclassifications of fair value between Level 1, Level 2, and Level 3 of the fair value hierarchy, if applicable, are made at the end of each quarter. No transfers between Level 1 and Level 2 occurred during the years ended December 31, 2013 or 2012.
	Additional fair value disclosures
	Notes receivable and other:  Notes receivable and other includes a receivable related to the sale of certain former Venezuela assets (see Note 4 – Discontinued Operations). The disclosed fair value of this receivable is determined by an income approach. We calculated the net present value of a probability-weighted set of cash flows utilizing assumptions based on contractual terms, historical payment patterns by the counterparty, future probabilities of default, our likelihood of using arbitration if the counterparty does not perform, and discount rates. We determined the fair value of the receivable to be $97 million at December 31, 2013. The carrying value of this receivable is $35 million at December 31, 2013. The current and noncurrent portions are reported in Accounts and notes receivable, net and Regulatory assets, deferred charges, and other, respectively, in the Consolidated Balance Sheet.
	Notes receivable and other also includes a receivable from our former affiliate, WPX (see Note 17 – Contingent Liabilities and Commitments) and other notes receivable. The disclosed fair value of these receivables is primarily determined by an income approach which considers the underlying contract amounts and our assessment of our ability to recover these amounts. The current portion is reported in Accounts and notes receivable, net and the noncurrent portion is reported in Regulatory assets, deferred charges, and other in the Consolidated Balance Sheet.
	Long-term debt:  The disclosed fair value of our long-term debt is determined by a market approach using broker quoted indicative period-end bond prices. The quoted prices are based on observable transactions in less active markets for our debt or similar instruments.
	Guarantee:  The guarantee represented in the table consists of a guarantee we have provided in the event of nonpayment by our previously owned communications subsidiary, Williams Communications Group (WilTel), on a lease performance obligation that extends through 2042.
	To estimate the disclosed fair value of the guarantee, an estimated default rate is applied to the sum of the future contractual lease payments using an income approach. The estimated default rate is determined by obtaining the average cumulative issuer-weighted corporate default rate based on the credit rating of WilTel’s current owner and the term of the underlying obligation. The default rate is published by Moody’s Investors Service. This guarantee is reported in Accrued liabilities in the Consolidated Balance Sheet.
	Guarantees
	We are required by our revolving credit agreements to indemnify lenders for certain taxes required to be withheld from payments due to the lenders and for certain tax payments made by the lenders. The maximum potential amount of future payments under these indemnifications is based on the related borrowings and such future payments cannot currently be determined. These indemnifications generally continue indefinitely unless limited by the underlying tax regulations and have no carrying value. We have never been called upon to perform under these indemnifications and have no current expectation of a future claim.
	Regarding our previously described guarantee of WilTel’s lease performance, the maximum potential exposure is approximately $35 million, and $36 million at December 31, 2013 and 2012, respectively. Our exposure declines systematically throughout the remaining term of WilTel’s obligation.
	We have provided guarantees in the event of nonpayment by our previously owned subsidiary, WPX, on certain contracts, primarily a natural gas purchase contract extending through 2023. We estimate the maximum undiscounted potential future payment obligation under these remaining guarantees is approximately $69 million at December 31, 2013. Our recorded liability for these guarantees, which considers our estimate of the fair value of the guarantees, is insignificant.
	Concentration of Credit Risk
	Cash equivalents
	Our cash equivalents are primarily invested in funds with high-quality, short-term securities and instruments that are issued or guaranteed by the U.S. government.
	Accounts and notes receivable
	The following table summarizes concentration of receivables, net of allowances.
		December 31,
		2013			2012
		(Millions)
	NGLs, natural gas, and related products and services	$	341		$	411
	Transportation of natural gas and related products	193			170
	Income tax receivable	74			68
	Other	66			39
	Total	$	674		$	688
	Customers include producers, distribution companies, industrial users, gas marketers and pipelines primarily located in the continental United States and Canada. As a general policy, collateral is not required for receivables, but customers’ financial condition and credit worthiness are evaluated regularly.
	Revenues
	In 2013, 2012, and 2011, we had one customer in our Williams Partners segment that accounted for 9 percent, 14 percent and 17 percent of our consolidated revenues, respectively.

Contingent_Liabilities_and_Com

Contingent Liabilities and Commitments	12 Months Ended
	Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]	'
Contingent Liabilities	'
	Note 17 – Contingent Liabilities and Commitments
	Indemnification of WPX Matters
	We have agreed to indemnify our former affiliate, WPX and its subsidiaries, related to the following matters. In connection with this indemnification, we have accrued asset and liability balances associated with these matters, and as a result, have an indirect exposure to future developments in these matters.
	Issues resulting from California energy crisis
	WPX’s former power business was engaged in power marketing in various geographic areas, including California. Prices charged for power by WPX and other traders and generators in California and other western states in 2000 and 2001 were challenged in various proceedings, including those before the FERC. WPX has entered into settlements with the State of California (State Settlement), major California utilities (Utilities Settlement), and others that substantially resolved each of these issues with these parties.
	Although the State Settlement and Utilities Settlement resolved a significant portion of the refund issues among the settling parties, WPX continues to have potential refund exposure to nonsettling parties, including various California end users that did not participate in the Utilities Settlement. WPX and certain California utilities have agreed in principle to resolve WPX’s collection of accrued interest from counterparties as well as WPX’s payment of accrued interest on refund amounts. On December 23, 2013, the parties submitted their settlement to the FERC for regulatory approval. The settlement will resolve most of WPX’s legal issues arising from the 2000-2001 California Energy Crisis. We currently have a net receivable from WPX related to these matters.
	Reporting of natural gas-related information to trade publications
	Direct and indirect purchasers of natural gas in various states filed class actions against WPX and others alleging the manipulation of published gas price indices and seeking unspecified amounts of damages. Such actions were transferred to the Nevada federal district court for consolidation of discovery and pre-trial issues.
	In 2011, the Nevada district court granted WPX’s joint motions for summary judgment to preclude the plaintiffs’ state law claims because the federal Natural Gas Act gives the FERC exclusive jurisdiction to resolve those issues. The court also denied the plaintiffs’ class certification motion as moot. The plaintiffs appealed the court’s ruling and on April 10, 2013, the Ninth Circuit Court of Appeals reversed the district court and remanded the cases to the district court to permit the plaintiffs to pursue their state antitrust claims for natural gas sales that were not subject to FERC jurisdiction under the Natural Gas Act. On August 26, 2013, WPX and the other defendants filed their petition for a writ of certiorari with the U.S. Supreme Court. Because of the uncertainty around the remaining pending unresolved issues, including an insufficient description of the purported classes and other related matters, we cannot reasonably estimate a range of potential exposures at this time. However, it is reasonably possible that the ultimate resolution of these items and our related indemnification obligation could result in future charges that may be material to our results of operations.
	Other Legal Matters
	Geismar Incident
	As a result of the previously discussed Geismar Incident, there were two fatalities and numerous individuals (including employees and contractors) reported injuries, which varied from minor to serious. WPZ is cooperating with the Chemical Safety Board, and the U.S. Environmental Protection Agency (EPA) regarding their investigations of the Geismar Incident. On October 21, 2013, the EPA issued an Inspection Report pursuant to the Clean Air Act’s Risk Management Program following its inspection of the facility on June 24 through 28, 2013. The report notes the EPA’s preliminary determinations about the facility’s documentation regarding process safety, process hazard analysis, as well as operating procedures, employee training, and other matters. We and the EPA continue to discuss such preliminary determinations, and the EPA could issue penalties pertaining to final determinations. On December 11, 2013, the Occupational Safety and Health Administration (OSHA) issued Citations for the June 13, 2013 incident, which included a Notice of Penalty for $99,000. Although we and OSHA continue settlement negotiations, we are contesting the citation. On June 28, 2013, the Louisiana Department of Environmental Quality (LDEQ) issued a Consolidated Compliance Order & Notice of Potential Penalty to Williams Olefins, L.L.C. that consolidates claims of unpermitted emissions and other deviations under the Clean Air Act that the parties had been negotiating since 2010 and alleged unpermitted emissions arising from the Geismar Incident. Negotiations with the LDEQ are ongoing. Any potential fines and penalties from these agencies would not be covered by our insurance policy. Additionally, multiple lawsuits, including class actions for alleged offsite impacts, property damage, and personal injury, have been filed against various of our subsidiaries.
	Due to the ongoing investigation into the cause of the incident, and the limited information available associated with the filed lawsuits, which do not specify any amounts for claimed damages, we cannot reasonably estimate a range of potential loss related to these contingencies at this time.
	Gulf Liquids litigation
	Gulf Liquids, one of our subsidiaries, contracted with Gulsby Engineering Inc. (Gulsby) and Gulsby-Bay (a joint venture between Gulsby and Bay Ltd.) for the construction of certain gas processing plants in Louisiana. National American Insurance Company (NAICO) and American Home Assurance Company provided payment and performance bonds for the projects. In 2001, the contractors and sureties filed multiple cases in Louisiana and Texas against Gulf Liquids and us.
	In 2006, at the conclusion of the consolidated trial of the asserted contract and tort claims, the jury returned its actual and punitive damages verdict against us and Gulf Liquids. Based on our interpretation of the jury verdicts, we recorded a charge based on our estimated exposure for actual damages of approximately $68 million plus potential interest of approximately $20 million. In addition, we concluded that it was reasonably possible that any ultimate judgment might have included additional amounts of approximately $199 million in excess of our accrual, which primarily represented our estimate of potential punitive damage exposure under Texas law.
	From May through October 2007, the court entered seven post-trial orders in the case (interlocutory orders) which, among other things, overruled the verdict award of tort and punitive damages as well as any damages against us. The court also denied the plaintiffs’ claims for attorneys’ fees. On January 28, 2008, the court issued its judgment awarding damages against Gulf Liquids of approximately $11 million in favor of Gulsby and approximately $4 million in favor of Gulsby-Bay. Gulf Liquids, Gulsby, Gulsby-Bay, Bay Ltd., and NAICO appealed the judgment. In February 2009, we settled with certain of these parties and reduced our accrued liability as of December 31, 2008, by $43 million, including $11 million of interest. On February 17, 2011, the Texas Court of Appeals upheld the dismissals of the tort and punitive damages claims. As a result, we reduced our accrued liability as of December 31, 2011 by $33 million, including $14 million of interest. The Texas Court of Appeals also reversed and remanded the remaining claims for further proceedings. None of the parties filed a petition for review in the Texas Supreme Court. On May 8, 2012, the Texas Court of Appeals issued its mandate remanding the original breach of contract claims involving Gulsby and attorney fee claims (the remaining claims) to trial court. Trial is set for October 14, 2014.
	Alaska refinery contamination litigation
	In January 2010, James West filed a class action lawsuit in state court in Fairbanks, Alaska on behalf of individual property owners whose water contained sulfolane contamination allegedly emanating from the Flint Hills Oil Refinery in North Pole, Alaska. The suit named our subsidiary, Williams Alaska Petroleum Inc. (WAPI), and Flint Hills Resources Alaska, LLC (FHRA), a subsidiary of Koch Industries, Inc., as defendants. We owned and operated the refinery until 2004 when we sold it to FHRA. We and FHRA have made claims under the pollution liability insurance policy issued in connection with the sale of the North Pole refinery to FHRA. We and FHRA also filed claims against each other seeking, among other things, contractual indemnification alleging that the other party caused the sulfolane contamination.
	In 2011, we and FHRA settled the James West claim. We and FHRA subsequently filed motions for summary judgment on the other’s claims. On November 5, 2013, the court ruled that the applicable statute of limitations bars all FHRA’s claims against us and dismissed those claims with prejudice. FHRA has asked the court to reconsider and clarify its ruling, and we anticipate that FHRA will appeal the court’s decision.
	We currently estimate that our reasonably possible loss exposure in this matter could range from an insignificant amount up to $32 million, although uncertainties inherent in the litigation process, expert evaluations, and jury dynamics might cause our exposure to exceed that amount.
	Independent of the litigation matter described in the preceding paragraphs, the Alaska Department of Environmental Conservation (ADEC) indicated that it views FHRA and us as responsible parties. During the first quarter of 2013 and again on December 23, 2013, ADEC informed FHRA and us that it intends to enter a compliance order to address the environmental remediation of sulfolane and other possible contaminants including cleanup work outside the refinery’s boundaries to be performed in 2014. In addition, ADEC will seek from each of FHRA and us an adequate financial performance guarantee for the benefit of ADEC. As such, we will likely be required to contribute some amount, whether to reimburse the State, to reimburse FHRA, or to comply with an ADEC order. Due to the ongoing assessment of the level and extent of sulfolane contamination and the ultimate cost of remediation and division of costs between the named responsible parties, we are unable to estimate a range of liability at this time.
	Other
	On August 31, 2012, Transco submitted to the FERC a general rate filing principally designed to recover increased costs and to comply with the terms of the settlement in its prior rate proceedings. The new rates became effective March 1, 2013, subject to refund and the outcome of the hearing. On August 27, 2013, Transco filed a stipulation and agreement with the FERC proposing to resolve all issues in this proceeding without the need for a hearing (Agreement). On December 6, 2013, the FERC issued an order approving the Agreement without modifications. Pursuant to its terms, the Agreement will become effective March 1, 2014. We have provided a reserve for rate refunds of $98 million, in Accrued liabilities, which we believe is adequate for required refunds as of December 31, 2013, under the Agreement. Refunds will be made on or before April 30, 2014.
	Environmental Matters
	We are a participant in certain environmental activities in various stages including assessment studies, cleanup operations and remedial processes at certain sites, some of which we currently do not own. We are monitoring these sites in a coordinated effort with other potentially responsible parties, the EPA, and other governmental authorities. We are jointly and severally liable along with unrelated third parties in some of these activities and solely responsible in others. Certain of our subsidiaries have been identified as potentially responsible parties at various Superfund and state waste disposal sites. In addition, these subsidiaries have incurred, or are alleged to have incurred, various other hazardous materials removal or remediation obligations under environmental laws. As of December 31, 2013, we have accrued liabilities totaling $47 million for these matters, as discussed below. Our accrual reflects the most likely costs of cleanup, which are generally based on completed assessment studies, preliminary results of studies or our experience with other similar cleanup operations. Certain assessment studies are still in process for which the ultimate outcome may yield significantly different estimates of most likely costs. Any incremental amount in excess of amounts currently accrued cannot be reasonably estimated at this time due to uncertainty about the actual number of contaminated sites ultimately identified, the actual amount and extent of contamination discovered and the final cleanup standards mandated by the EPA and other governmental authorities.
	The EPA and various state regulatory agencies routinely promulgate and propose new rules, and issue updated guidance to existing rules. More recent rules and rulemakings include, but are not limited to, rules for reciprocating internal combustion engine maximum achievable control technology, new air quality standards for ground level ozone, one hour nitrogen dioxide emission limits, and new air quality standards impacting storage vessels, pressure valves, and compressors. We are unable to estimate the costs of asset additions or modifications necessary to comply with these new regulations due to uncertainty created by the various legal challenges to these regulations and the need for further specific regulatory guidance.
	Continuing operations
	Our interstate gas pipelines are involved in remediation activities related to certain facilities and locations for polychlorinated biphenyls, mercury, and other hazardous substances. These activities have involved the EPA and various state environmental authorities, resulting in our identification as a potentially responsible party at various Superfund waste sites. At December 31, 2013, we have accrued liabilities of $13 million for these costs. We expect that these costs will be recoverable through rates.
	We also accrue environmental remediation costs for natural gas underground storage facilities, primarily related to soil and groundwater contamination. At December 31, 2013, we have accrued liabilities totaling $7 million for these costs.
	Former operations, including operations classified as discontinued
	We have potential obligations in connection with assets and businesses we no longer operate. These potential obligations include the indemnification of the purchasers of certain of these assets and businesses for environmental and other liabilities existing at the time the sale was consummated. Our responsibilities relate to the operations of the assets and businesses described below.
	•	Former agricultural fertilizer and chemical operations and former retail petroleum and refining operations;
	•	Former petroleum products and natural gas pipelines;
	•	Former petroleum refining facilities;
	•	Former exploration and production and mining operations;
	•	Former electricity and natural gas marketing and trading operations.
	At December 31, 2013, we have accrued environmental liabilities of $27 million related to these matters.
	Other Divestiture Indemnifications
	Pursuant to various purchase and sale agreements relating to divested businesses and assets, we have indemnified certain purchasers against liabilities that they may incur with respect to the businesses and assets acquired from us. The indemnities provided to the purchasers are customary in sale transactions and are contingent upon the purchasers incurring liabilities that are not otherwise recoverable from third parties. The indemnities generally relate to breach of warranties, tax, historic litigation, personal injury, property damage, environmental matters, right of way and other representations that we have provided.
	At December 31, 2013, other than as previously disclosed, we are not aware of any material claims involving the indemnities; thus, we do not expect any of the indemnities provided pursuant to the sales agreements to have a material impact on our future financial position. Any claim for indemnity brought against us in the future may have a material adverse effect on our results of operations in the period in which the claim is made.
	In addition to the foregoing, various other proceedings are pending against us which are incidental to our operations.
	Summary
	We have disclosed our estimated range of reasonably possible losses for certain matters above, as well as all significant matters for which we are unable to reasonably estimate a range of possible loss. We estimate that for all other matters for which we are able to reasonably estimate a range of loss, our aggregate reasonably possible losses beyond amounts accrued are immaterial to our expected future annual results of operations, liquidity and financial position. These calculations have been made without consideration of any potential recovery from third parties.
	Commitments
	Commitments for construction and acquisition of property, plant, and equipment are approximately $1.5 billion at December 31, 2013.

Segment_Disclosures

Segment Disclosures	12 Months Ended
	Dec. 31, 2013
Segment Reporting [Abstract]	'
Segment Disclosures	'
	Note 18 – Segment Disclosures
	Our reportable segments are Williams Partners, Williams NGL & Petchem Services, and Access Midstream Partners. All remaining business activities are included in Other. (See Note 1 – Description of Business, Basis of Presentation, and Summary of Significant Accounting Policies.)
	Our segment presentation of Williams Partners is reflective of the parent-level focus by our chief operating decision-maker, considering the resource allocation and governance provisions associated with this master limited partnership structure. WPZ maintains a capital and cash management structure that is separate from ours. WPZ is self-funding and maintains its own lines of bank credit and cash management accounts. These factors, coupled with a different cost of capital from our other businesses, serve to differentiate the management of this entity as a whole.
	Our segment presentation of Access Midstream Partners reflects the significant size of this investment and the economic opportunities it represents in major unconventional producing areas that add diversity to our current asset base.
	Performance Measurement
	We currently evaluate segment operating performance based upon Segment profit (loss) from operations, which includes Segment revenues from external and internal customers, segment costs and expenses, Equity earnings (losses) and Income (loss) from investments. General corporate expenses represent Selling, general, and administrative expenses that are not allocated to our segments. The accounting policies of the segments are the same as those described in Note 1 – Description of Business, Basis of Presentation, and Summary of Significant Accounting Policies. Intersegment revenues are generally accounted for at current market prices as if the sales were to unaffiliated third parties.
	The following geographic area data includes Revenues from external customers based on product shipment origin and Long-lived assets based upon physical location.
				United States			Canada			Total
				(Millions)
	Revenues from external customers:
		2013	$	6,703		$	157		$	6,860
		2012		7,335			151			7,486
		2011		7,728			202			7,930
	Long-lived assets:
		2013	$	19,260		$	1,240		$	20,500
		2012		16,940			880			17,820
		2011		12,041			583			12,624
	Long-lived assets are comprised of property, plant, and equipment, goodwill, and other intangible assets.
	As discussed in Note 1 – Description of Business, Basis of Presentation, and Summary of Significant Accounting Policies and Note 4 – Discontinued Operations, our former exploration and production business was spun-off on December 31, 2011 and has been reported as discontinued operations in all prior periods presented. Revenues derived from intercompany sales to our former exploration and production business, previously reported as internal, are now shown as external. These sales were $310 million for the year ended 2011. In addition, costs attributable to activities with our former exploration and production business, previously reported as internal, are now shown as external. Such costs were $845 million for the year ended 2011. We continue to recognize revenue as we provide certain gathering, processing, and treating services to WPX under long term agreements.
	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 Other financial information related to Long-lived assets.
		Williams				Williams				Access			Other			Eliminations			Total
		Partners				NGL & Petchem				Midstream
						Services				Partners
		(Millions)
	2013
	Segment revenues:
	Service revenues
	External	$	2,910			$	4			$	—		$	25		$	—		$	2,939
	Internal	—				—				—			11			(11		)	—
	Total service revenues	2,910				4				—			36			(11		)	2,939
	Product sales
	External	3,775				146				—			—			—			3,921
	Internal	—				123				—			—			(123		)	—
	Total product sales	3,775				269				—			—			(123		)	3,921
	Total revenues	$	6,685			$	273			$	—		$	36		$	(134	)	$	6,860
	Segment profit (loss)	$	1,606			$	38			$	61		$	(4	)				$	1,701
	Less:
	Equity earnings (losses)	104				—				30			—						134
	Income (loss) from investments	—				(3		)		31			—						28
	Segment operating income (loss)	$	1,502			$	41			$	—		$	(4	)				1,539
	General corporate expenses																		(164		)
	Operating income (loss)																		$	1,375
	Other financial information:
	Additions to long-lived assets	$	3,055			$	649			$	—		$	27		$	—		$	3,731
	Depreciation and amortization	758				33				—			24			—			815
	2012
	Segment revenues:
	Service revenues
	External	$	2,709			$	5			$	—		$	15		$	—		$	2,729
	Internal	—				—				—			12			(12		)	—
	Total service revenues	2,709				5				—			27			(12		)	2,729
	Product sales
	External	4,611				146				—			—			—			4,757
	Internal	—				128				—			—			(128		)	—
	Total product sales	4,611				274				—			—			(128		)	4,757
	Total revenues	$	7,320			$	279			$	—		$	27		$	(140	)	$	7,486
	Segment profit (loss)	$	1,812			$	99			$	—		$	49					$	1,960
	Less:
	Equity earnings (losses)	111				—				—			—						111
	Income (loss) from investments	—				(4		)		—			53						49
	Segment operating income (loss)	$	1,701			$	103			$	—		$	(4	)				1,800
	General corporate expenses																		(188		)
	Operating income (loss)																		$	1,612
Other financial information:
Additions to long-lived assets	$	5,562			$	425			$	—		$	31		$	—		$	6,018
Depreciation and amortization	714				20				—			22			—			756
	Williams				Williams				Access			Other			Eliminations			Total
	Partners				NGL & Petchem				Midstream
					Services				Partners
	(Millions)
2011
Segment revenues:
Service revenues
External	$	2,517			$	1			$	—		$	14		$	—		$	2,532
Internal	—				—				—			11			(11		)	—
Total service revenues	2,517				1				—			25			(11		)	2,532
Product sales
External	5,197				201				—			—			—			5,398
Internal	—				139				—			—			(139		)	—
Total product sales	5,197				340				—			—			(139		)	5,398
Total revenues	$	7,714			$	341			$	—		$	25		$	(150	)	$	7,930
Segment profit (loss)	$	2,035			$	157			$	—		$	24					$	2,216
Less:
Equity earnings (losses)	142				—				—			13						155
Income (loss) from investments	—				(4		)		—			11						7
Segment operating income (loss)	$	1,893			$	161			$	—		$	—					2,054
General corporate expenses																		(187		)
Operating income (loss)																		$	1,867
Other financial information:
Additions to long-lived assets	$	1,273			$	211			$	—		$	46		$	—		$	1,530
Depreciation and amortization	621				16				—			24			—			661
The following table reflects Total assets and Equity method investments by reportable segments:
		Total Assets								Equity Method Investments
		31-Dec-13				31-Dec-12				31-Dec-13			31-Dec-12
		(Millions)
Williams Partners		$	22,358			$	19,709			$	2,187		$	1,800
Williams NGL & Petchem Services		1,711				1,134				12			—
Access Midstream Partners		2,161				2,187				2,161			2,187
Other		1,625				1,782				—			—
Eliminations		(713		)		(485		)		—			—
Total		$	27,142			$	24,327			$	4,360		$	3,987

Subsequent_Events_Notes

Subsequent Events (Notes)	12 Months Ended
	Dec. 31, 2013
Subsequent Events [Abstract]	'
Subsequent Events [Text Block]	'
	Note 19 – Subsequent Events
	Commercial Paper Outstanding Balance
	As of February 25, 2014, $900 million is outstanding under WPZ’s commercial paper program.
	Canada Dropdown
	In February 2014, we agreed to contribute certain Canadian operations to WPZ for total consideration valued at approximately $1.2 billion. The transaction is expected to close in February 2014. Upon closing we expect to receive $25 million of cash, 25,577,521 Class D limited-partner units, and an increase in our general partner capital account that will allow us to maintain our 2 percent general partner interest. In lieu of cash distributions, the Class D units will receive quarterly distributions of additional paid-in-kind Class D units, all of which will be convertible to common units at a future date. The agreement also provides that WPZ can issue additional Class D units to us on a quarterly basis through 2015 for up to a total of $200 million in cash for the purpose of funding certain facility expansions.

Schedule_I_Condensed_Financial

Schedule I Condensed Financial Information Of Parent Company Only	12 Months Ended
	Dec. 31, 2013
Condensed Financial Information of Parent Company Only Disclosure [Abstract]	'
Condensed Financial Information of Parent Company Only Disclosure [Text Block]	'
	The Williams Companies, Inc.
	Schedule I — Condensed Financial Information of Registrant
	Statement of Comprehensive Income (Parent)
		Years Ended December 31,
		2013			2012			2011
		(Millions, except per-share amounts)
	Equity in earnings of consolidated subsidiaries	$	1,564		$	1,895		$	1,962
	Equity earnings from investment in Access Midstream Partners	30			—			—
	Interest incurred — external	(156		)	(128		)	(186		)
	Interest incurred — affiliate	(722		)	(816		)	(622		)
	Interest income — affiliate	71			84			84
	Early debt retirement costs	—			—			(271		)
	Other income (expense) — net	32			3			(45		)
	Income from continuing operations before income taxes	819			1,038			922
	Provision for income taxes	378			315			119
	Income (loss) from continuing operations	441			723			803
	Income (loss) from discontinued operations	(11		)	136			(427		)
	Net income (loss)	$	430		$	859		$	376
	Basic earnings (loss) per common share:
	Income (loss) from continuing operations	$	0.65		$	1.17		$	1.36
	Income (loss) from discontinued operations	(.02		)	0.22			(.72		)
	Net income (loss)	$	0.63		$	1.39		$	0.64
	Weighted-average shares (thousands)	682,948			619,792			588,553
	Diluted earnings (loss) per common share:
	Income (loss) from continuing operations	$	0.64		$	1.15		$	1.34
	Income (loss) from discontinued operations	(.02		)	0.22			(.71		)
	Net income (loss)	$	0.62		$	1.37		$	0.63
	Weighted-average shares (thousands)	687,185			625,486			598,175
	Other comprehensive income (loss):
	Equity in other comprehensive income (loss) of consolidated subsidiaries	$	(41	)	$	21		$	35
	Other comprehensive income (loss) attributable to The Williams Companies, Inc.	239			6			(123		)
	Other comprehensive income (loss)	198			27			(88		)
	Comprehensive income (loss) attributable to The Williams Companies, Inc.	$	628		$	886		$	288
	See accompanying notes.
	The Williams Companies, Inc.
	Schedule I — Condensed Financial Information of Registrant – (Continued)
	Balance Sheet (Parent)
		December 31,
		2013			2012
		(Millions)
	ASSETS
	Current assets:
	Cash and cash equivalents	$	282		$	340
	Other current assets and deferred charges	167			229
	Total current assets	449			569
	Investments in and advances to consolidated subsidiaries	19,162			16,686
	Investment in Access Midstream Partners	2,161			2,187
	Property, plant, and, equipment — net	68			62
	Other noncurrent assets	34			117
	Total assets	$	21,874		$	19,621
	LIABILITIES AND STOCKHOLDERS’ EQUITY
	Current liabilities:
	Accounts payable	$	26		$	29
	Long-term debt due within one year	1			1
	Other current liabilities	147			122
	Total current liabilities	174			152
	Long-term debt	2,296			2,298
	Notes payable — affiliates	10,830			8,938
	Pension, other postretirement, and other noncurrent liabilities	282			712
	Deferred income taxes	3,428			2,769
	Contingent liabilities and commitments
	Equity:
	Common stock	718			716
Other stockholders’ equity	4,146			4,036
Total stockholders’ equity	4,864			4,752
Total liabilities and stockholders’ equity	$	21,874		$	19,621
See accompanying notes.
The Williams Companies, Inc.
Schedule I — Condensed Financial Information of Registrant – (Continued)
Statement of Cash Flows (Parent)
	Years Ended December 31,
	2013			2012			2011
	(Millions)
NET CASH FLOWS PROVIDED (USED) BY OPERATING ACTIVITIES	$	19		$	(11	)	$	(286	)
FINANCING ACTIVITIES:
Proceeds from long-term debt	—			848			75
Payments of long-term debt	(1		)	(28		)	(871		)
Changes in notes payable to affiliates	1,892			520			(590		)
Tax benefit of stock-based awards	19			44			22
Premiums paid on early debt retirement	—			—			(254		)
Proceeds from issuance of common stock	18			2,550			49
Dividends paid	(982		)	(742		)	(457		)
Other — net	(3		)	(7		)	(5		)
Net cash provided (used) by financing activities	943			3,185			(2,031		)
INVESTING ACTIVITIES:
Capital expenditures	(23		)	(18		)	(28		)
Purchase of investment in Access Midstream Partners	(4		)	(2,179		)	—
Changes in investments in and advances to consolidated subsidiaries	(985		)	(953		)	2,553
Other — net	(8		)	24			(18		)
Net cash provided (used) by investing activities	(1,020		)	(3,126		)	2,507
Increase (decrease) in cash and cash equivalents	(58		)	48			190
Cash and cash equivalents at beginning of year	340			292			102
Cash and cash equivalents at end of year	$	282		$	340		$	292
See accompanying notes.
Note 1. Guarantees
In addition to the guarantees disclosed in the accompanying consolidated financial statements in Item 8, we have financially guaranteed the performance of certain consolidated subsidiaries. The duration of these guarantees varies and we estimate the maximum undiscounted potential future payment obligation related to these guarantees as of December 31, 2013, is approximately $3.8 billion.
Note 2. Cash Dividends Received
We receive dividends and distributions either directly from our subsidiaries or indirectly through dividends received by subsidiaries and subsequent transfers of cash to us through our corporate cash management system. The total of such receipts ultimately related to dividends and distributions for the years ended December 31, 2013, 2012 and 2011 was approximately $1.5 billion, $1.1 billion, and $1.2 billion, respectively.

Schedule_II_Valuation_and_Qual

Schedule II Valuation and Qualifying Accounts	12 Months Ended
	Dec. 31, 2013
Valuation and Qualifying Accounts [Abstract]	'
Valuation and Qualifying Accounts	'
				Additions
		Beginning		Charged			Other		Deductions			Ending
		Balance		(Credited)								Balance
				To Costs and
				Expenses
		(Millions)
	2013
	Allowance for doubtful accounts — accounts and notes receivable (1)	$	—	$	—		$	—	$	—		$	—
	Deferred tax asset valuation allowance (1)	144		37			—		—			181
	2012
	Allowance for doubtful accounts — accounts and notes receivable (1)	1		—			—		1		(3)	—
	Deferred tax asset valuation allowance (1)	145		(1		)	—		—			144
	2011
	Allowance for doubtful accounts — accounts and notes receivable (2)	15		1			—		15		(4)	1
	Deferred tax asset valuation allowance (5)	249		(33		)	—		71		(4)	145
	_______________________
	(1)    Deducted from related assets.
	(2)    Deducted from related assets, primarily included in assets of discontinued operations.
	(3)    Represents balances written off, reclassifications, and recoveries.
	(4)    Includes balance deductions due to the spin-off of our exploration and production business on December 31,
	2011
	(5)    Deducted primarily from related assets, with a portion included in assets of discontinued operations.

Description_of_Business_Basis_

Description of Business, Basis of Presentation and Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2013
Accounting Policies [Abstract]	'
Principles of consolidation	'
	Principles of consolidation
	The consolidated financial statements include the accounts of all entities that we control and our proportionate interest in the accounts of ventures in which we own an undivided interest. Management judgment is required to evaluate whether we control an entity. Key areas of that evaluation include:
	•	Determining whether an entity is a variable interest entity (VIE);
	•	Determining whether we are the primary beneficiary of a VIE, including evaluating which activities of the VIE most significantly impact its economic performance and the degree of power that we and our related parties have over those activities through our variable interests;
	•	Identifying events that require reconsideration of whether an entity is a VIE and continuously evaluating whether we are a VIE’s primary beneficiary;
	•	Evaluating whether other owners in entities that are not VIEs are able to effectively participate in significant decisions that would be expected to be made in the ordinary course of business such that we do not have the power to control such entities.
	We apply the equity method of accounting to investments in entities over which we exercise significant influence but do not control.
Equity method investment basis differences	'
	Equity-method investment basis differences
	Differences between the cost of our equity investments and our underlying equity in the net assets of investees are accounted for as if the investees were consolidated subsidiaries. Equity earnings (losses) in the Consolidated Statement of Income includes our allocable share of net income (loss) of investees adjusted for any depreciation and amortization, as applicable, associated with basis differences.
Use of estimates	'
	Use of estimates
	The preparation of financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results could differ from those estimates.
	Significant estimates and assumptions include:
	•	Impairment assessments of investments, property, plant, and equipment, goodwill, and other identifiable intangible assets;
	•	Litigation-related contingencies;
	•	Environmental remediation obligations;
	•	Realization of deferred income tax assets;
	•	Depreciation and/or amortization of equity-method investment basis differences;
	•	Asset retirement obligations;
	•	Pension and postretirement valuation variables;
	•	Acquisition related purchase price allocations.
	These estimates are discussed further throughout these notes.
Regulatory Accounting	'
	Regulatory accounting
	Transco and Northwest Pipeline are regulated by the Federal Energy Regulatory Commission (FERC). Their rates, which are established by the FERC, are designed to recover the costs of providing the regulated services, and their competitive environment makes it probable that such rates can be charged and collected. Therefore, our management has determined that it is appropriate to account for and report regulatory assets and liabilities related to these operations consistent with the economic effect of the way in which their rates are established. Accounting for these operations that are regulated can differ from the accounting requirements for nonregulated operations. The components of our regulatory assets and liabilities relate to the effects of deferred taxes on equity funds used during construction, asset retirement obligations, fuel cost differentials, levelized incremental depreciation, negative salvage, and postretirement benefits. Our current and noncurrent regulatory asset and liability balances for the years ended December 31, 2013 and 2012 are as follows:
		December 31,
		2013		2012
		(Millions)
	Current assets reported within Other current assets and deferred charges	$	39	$	39
	Noncurrent assets reported within Regulatory assets, deferred charges, and other	353		366
	Total regulated assets	$	392	$	405
	Current liabilities reported within Accrued liabilities	$	19	$	15
	Noncurrent liabilities reported within Other noncurrent liabilities	329		250
	Total regulated liabilities	$	348	$	265
Cash and cash equivalents	'
	Cash and cash equivalents
	Cash and cash equivalents in the Consolidated Balance Sheet includes amounts primarily invested in funds with high-quality, short-term securities and instruments that are issued or guaranteed by the U.S. government. These have maturity dates of three months or less when acquired.
Accounts receivable	'
	Accounts receivable
	Accounts receivable are carried on a gross basis, with no discounting, less the allowance for doubtful accounts. We estimate the allowance for doubtful accounts based on existing economic conditions, the financial condition of our customers, and the amount and age of past due accounts. We consider receivables past due if full payment is not received by the contractual due date. Interest income related to past due accounts receivable is generally recognized at the time full payment is received or collectability is assured. Past due accounts are generally written off against the allowance for doubtful accounts only after all collection attempts have been exhausted.
Inventory valuation	'
	Inventory valuation
	All Inventories in the Consolidated Balance Sheet are stated at the lower of cost or market. The cost of inventories is primarily determined using the average-cost method.
Property, plant, and equipment	'
	Property, plant, and equipment
	Property, plant, and equipment is recorded at cost. We base the carrying value of these assets on estimates, assumptions, and judgments relative to capitalized costs, useful lives, and salvage values.
	As regulated entities, Northwest Pipeline and Transco provide for depreciation using the straight-line method at FERC-prescribed rates. Depreciation for nonregulated entities is provided primarily on the straight-line method over estimated useful lives, except for certain offshore facilities that apply a declining balance method. (See Note 11 – Property, Plant, and Equipment.)
	Gains or losses from the ordinary sale or retirement of property, plant, and equipment for regulated pipelines are credited or charged to accumulated depreciation. Other gains or losses are recorded in Other (income) expense – net included in Operating income (loss) in the Consolidated Statement of Income.
	Ordinary maintenance and repair costs are generally expensed as incurred. Costs of major renewals and replacements are capitalized as property, plant, and equipment.
	We record a liability and increase the basis in the underlying asset for the present value of each expected future asset retirement obligation (ARO) at the time the liability is initially incurred, typically when the asset is acquired or constructed. As regulated entities, Northwest Pipeline and Transco offset the depreciation of the underlying asset that is attributable to capitalized ARO cost to a regulatory asset. We measure changes in the liability due to passage of time by applying an interest method of allocation. This amount is recognized as an increase in the carrying amount of the liability and as a corresponding accretion expense included in Operating and maintenance expenses in the Consolidated Statement of Income, except for regulated entities, for which the liability is offset by a regulatory asset as management expects to recover amounts in future rates. The regulatory asset is amortized commensurate with our collection of those costs in rates.
	Measurements of AROs include, as a component of future expected costs, an estimate of the price that a third party would demand, and could expect to receive, for bearing the uncertainties inherent in the obligations, sometimes referred to as a market-risk premium.
Goodwill	'
	Goodwill
	Goodwill in the Consolidated Balance Sheet represents the excess cost over fair value of the net assets of businesses acquired. It is not subject to amortization but is evaluated annually as of October 1 for impairment or more frequently if impairment indicators are present that would indicate it is more likely than not that the fair value of the reporting unit is less than its carrying amount. As part of the evaluation, we compare our estimate of the fair value of the reporting unit with its carrying value, including goodwill. If the carrying value of the reporting unit exceeds its fair value, a computation of the implied fair value of the goodwill is compared with its related carrying value. If the carrying value of the reporting unit goodwill exceeds the implied fair value of that goodwill, an impairment loss is recognized in the amount of the excess.
Other intangibles assets	'
	Other intangible assets
	Our identifiable intangible assets are primarily related to gas gathering, processing and fractionation contracts, and relationships with customers. Our intangible assets are amortized on a straight-line basis over the period in which these assets contribute to our cash flows. We evaluate these assets for changes in the expected remaining useful lives and would reflect any changes prospectively through amortization over the revised remaining useful life.
Impairment of property, plant, and equipment, other identifiable intangible assets and investments	'
	Impairment of property, plant, and equipment, other identifiable intangible assets, and investments
	We evaluate our property, plant, and equipment and other identifiable intangible assets for impairment when events or changes in circumstances indicate, in our management’s judgment, that the carrying value of such assets may not be recoverable. When an indicator of impairment has occurred, we compare our management’s estimate of undiscounted future cash flows attributable to the assets to the carrying value of the assets to determine whether an impairment has occurred and we may apply a probability-weighted approach to consider the likelihood of different cash flow assumptions and possible outcomes including selling in the near term or holding for the remaining estimated useful life. If an impairment of the carrying value has occurred, we determine the amount of the impairment recognized in the financial statements by estimating the fair value of the assets and recording a loss for the amount that the carrying value exceeds the estimated fair value. This evaluation is performed at the lowest level for which separately identifiable cash flows exist.
	For assets identified to be disposed of in the future and considered held for sale, we compare the carrying value to the estimated fair value less the cost to sell to determine if recognition of an impairment is required. Until the assets are disposed of, the estimated fair value, which includes estimated cash flows from operations until the assumed date of sale, is recalculated when related events or circumstances change.
	We evaluate our investments for impairment when events or changes in circumstances indicate, in our management’s judgment, that the carrying value of such investments may have experienced an other-than-temporary decline in value. When evidence of loss in value has occurred, we compare our estimate of fair value of the investment to the carrying value of the investment to determine whether an impairment has occurred. If the estimated fair value is less than the carrying value and we consider the decline in value to be other-than-temporary, the excess of the carrying value over the fair value is recognized in the consolidated financial statements as an impairment charge.
	Judgments and assumptions are inherent in our management’s estimate of undiscounted future cash flows and an asset’s or investment’s fair value. Additionally, judgment is used to determine the probability of sale with respect to assets considered for disposal.
Contingent liabilities	'
	Contingent liabilities
	We record liabilities for estimated loss contingencies, including environmental matters, when we assess that a loss is probable and the amount of the loss can be reasonably estimated. These liabilities are calculated based upon our assumptions and estimates with respect to the likelihood or amount of loss and upon advice of legal counsel, engineers, or other third parties regarding the probable outcomes of the matters. These calculations are made without consideration of any potential recovery from third parties. We recognize insurance recoveries or reimbursements from others when realizable. Revisions to these liabilities are generally reflected in income when new or different facts or information become known or circumstances change that affect the previous assumptions or estimates.
Cash flows from revolving credit facilities and commercial paper program	'
	Cash flows from revolving credit facilities and commercial paper program
	Proceeds and payments related to borrowings under our credit facilities are reflected in the financing activities in the Consolidated Statement of Cash Flows on a gross basis. Proceeds and payments related to borrowings under our commercial paper program are reflected in the financing activities in the Consolidated Statement of Cash Flows on a net basis, as the outstanding notes generally have maturity dates less than three months from the date of issuance. (See Note 13 – Debt, Banking Arrangements, and Leases.)
Treasury stock	'
	Treasury stock
	Treasury stock purchases are accounted for under the cost method whereby the entire cost of the acquired stock is recorded as Treasury stock in the Consolidated Balance Sheet. Gains and losses on the subsequent reissuance of shares are credited or charged to Capital in excess of par value in the Consolidated Balance Sheet using the average-cost method.
Derivative instruments and hedging activities	'
	Derivative instruments and hedging activities
	We may utilize derivatives to manage a portion of our commodity price risk. These instruments consist primarily of swaps, futures, and forward contracts involving short- and long-term purchases and sales of physical energy commodities. We report the fair value of derivatives, except for those for which the normal purchases and normal sales exception has been elected, in Other current assets and deferred charges; Regulatory assets, deferred charges, and other; Accrued liabilities, or Other noncurrent liabilities in the Consolidated Balance Sheet. We determine the current and noncurrent classification based on the timing of expected future cash flows of individual trades. We report these amounts on a gross basis. Additionally, we report cash collateral receivables and payables with our counterparties on a gross basis. See Note 16 – Fair Value Measurements, Guarantees, and Concentration of Credit Risk.
	The accounting for the changes in fair value of a commodity derivative can be summarized as follows:
	Derivative Treatment		Accounting Method
	Normal purchases and normal sales exception		Accrual accounting
	Designated in a qualifying hedging relationship		Hedge accounting
	All other derivatives		Mark-to-market accounting
	We may elect the normal purchases and normal sales exception for certain short- and long-term purchases and sales of physical energy commodities. Under accrual accounting, any change in the fair value of these derivatives is not reflected on the balance sheet after the initial election of the exception.
	We may also designate a hedging relationship for certain commodity derivatives. For a derivative to qualify for designation in a hedging relationship, it must meet specific criteria and we must maintain appropriate documentation. We establish hedging relationships pursuant to our risk management policies. We evaluate the hedging relationships at the inception of the hedge and on an ongoing basis to determine whether the hedging relationship is, and is expected to remain, highly effective in achieving offsetting changes in fair value or cash flows attributable to the underlying risk being hedged. We also regularly assess whether the hedged forecasted transaction is probable of occurring. If a derivative ceases to be or is no longer expected to be highly effective, or if we believe the likelihood of occurrence of the hedged forecasted transaction is no longer probable, hedge accounting is discontinued prospectively, and future changes in the fair value of the derivative are recognized currently in Product sales or Product costs in the Consolidated Statement of Income.
	For commodity derivatives designated as a cash flow hedge, the effective portion of the change in fair value of the derivative is reported in Accumulated other comprehensive income (loss) (AOCI) in the Consolidated Balance Sheet and reclassified into earnings in the period in which the hedged item affects earnings. Any ineffective portion of the derivative’s change in fair value is recognized currently in Product sales or Product costs in the Consolidated Statement of Income. Gains or losses deferred in AOCI associated with terminated derivatives, derivatives that cease to be highly effective hedges, derivatives for which the forecasted transaction is reasonably possible but no longer probable of occurring, and cash flow hedges that have been otherwise discontinued remain in AOCI until the hedged item affects earnings. If it becomes probable that the forecasted transaction designated as the hedged item in a cash flow hedge will not occur, any gain or loss deferred in AOCI is recognized in Product sales or Product costs in the Consolidated Statement of Income at that time. The change in likelihood of a forecasted transaction is a judgmental decision that includes qualitative assessments made by management.
	For commodity derivatives that are not designated in a hedging relationship, and for which we have not elected the normal purchases and normal sales exception, we report changes in fair value currently in Product sales or Product costs in the Consolidated Statement of Income.
	Certain gains and losses on derivative instruments included in the Consolidated Statement of Income are netted together to a single net gain or loss, while other gains and losses are reported on a gross basis. Gains and losses recorded on a net basis include unrealized gains and losses on all derivatives that are not designated as hedges and for which we have not elected the normal purchases and normal sales exception.
	Realized gains and losses on derivatives that require physical delivery, as well as natural gas derivatives for NGL processing activities and which are not held for trading purposes nor were entered into as a pre-contemplated buy/sell arrangement, are recorded on a gross basis. In reaching our conclusions on this presentation, we considered whether we act as principal in the transaction; whether we have the risks and rewards of ownership, including credit risk; and whether we have latitude in establishing prices.
Revenues	'
	Revenues
	As a result of the ratemaking process, certain revenues collected by us may be subject to refunds upon the issuance of final orders by the FERC in pending rate proceedings. We record estimates of rate refund liabilities considering our and other third-party regulatory proceedings, advice of counsel, and other risks.
	Service revenues
	Revenues from our gas pipeline businesses include services pursuant to long-term firm transportation and storage agreements. These agreements provide for a reservation charge based on the volume of contracted capacity and a commodity charge based on the volume of gas delivered, both at rates specified in our FERC tariffs. We recognize revenues for reservation charges ratably over the contract period regardless of the volume of natural gas that is transported or stored. Revenues for commodity charges, from both firm and interruptible transportation services, and storage injection and withdrawal services, are recognized when natural gas is delivered at the agreed upon delivery point or when natural gas is injected or withdrawn from the storage facility.
	Certain revenues from our midstream operations include those derived from natural gas gathering and processing services and are performed under volumetric-based fee contracts. These revenues are recorded when services have been performed.
	Crude oil gathering and transportation revenues and offshore production handling fees are recognized when the services have been performed. Certain offshore production handling contracts contain fixed payment terms that result in the deferral of revenues until such services have been performed.
	Storage revenues from our midstream operations associated with prepaid contracted storage capacity contracts are recognized on a straight-line basis over the life of the contract as services are provided.
	Product sales
	In the course of providing transportation services to customers of our interstate natural gas pipeline businesses, we may receive different quantities of gas from shippers than the quantities delivered on behalf of those shippers. The resulting imbalances are primarily settled through the purchase and sale of gas with our customers under terms provided for in our FERC tariffs. Revenue is recognized from the sale of gas upon settlement of the transportation and exchange imbalances.
	We market NGLs, crude oil, natural gas, and olefins that we purchase from our producer customers as part of the overall service provided to producers. Revenues from marketing NGLs are recognized when the products have been sold and delivered.
	Under our keep-whole and percent-of-liquids processing contracts, we retain the rights to all or a portion of the NGLs extracted from the producers’ natural gas stream and recognize revenues when the extracted NGLs are sold and delivered.
	Our domestic olefins business produces olefins from purchased or produced feedstock and we recognize revenues when the olefins are sold and delivered.
	Our Canadian business has processing and fractionation operations where we retain certain NGLs and olefins from an upgrader’s offgas stream and we recognize revenues when the fractionated products are sold and delivered.
Interest capitalized	'
	Interest capitalized
	We capitalize interest during construction on major projects with construction periods of at least 3 months and a total project cost in excess of $1 million. Interest is capitalized on borrowed funds and where regulation by the FERC exists, on internally generated funds. The latter is included in Other income (expense) – net below Operating income (loss) in the Consolidated Statement of Income. The rates used by regulated companies are calculated in accordance with FERC rules. Rates used by nonregulated companies are based on our average interest rate on debt.
Employee stock-based awards	'
	Employee stock-based awards
	We recognize compensation expense on employee stock-based awards, net of estimated forfeitures, on a straight-line basis. (See Note 15 – Stock-Based Compensation.)
Pension and other postretirement benefits	'
	Pension and other postretirement benefits
	The funded status of each of the pension and other postretirement benefit plans is recognized separately in the Consolidated Balance Sheet as either an asset or liability. The funded status is the difference between the fair value of plan assets and the plan’s benefit obligation. The plans’ benefit obligations and net periodic benefit costs are actuarially determined and impacted by various assumptions and estimates. (See Note 9 – Employee Benefit Plans.)
	The discount rates are determined separately for each of our pension and other postretirement benefit plans based on an approach specific to our plans. The year-end discount rates are determined considering a yield curve comprised of high-quality corporate bonds and the timing of the expected benefit cash flows of each plan.
	The expected long-term rates of return on plan assets are determined by combining a review of the historical returns within the portfolio, the investment strategy included in the plans’ investment policy statement, and capital market projections for the asset classes in which the portfolio is invested, as well as the weighting of each asset class.
	Unrecognized actuarial gains and losses and unrecognized prior service costs and credits are deferred and recorded in accumulated other comprehensive income or, for Transco and Northwest Pipeline, as a regulatory asset or liability, until amortized as a component of net periodic benefit cost. Unrecognized actuarial gains and losses in excess of 10 percent of the greater of the benefit obligation or the market-related value of plan assets are amortized over the participants’ average remaining future years of service, which is approximately 12 years for our pension plans and approximately 8 years for our other postretirement benefit plans. Unrecognized prior service costs and credits for the other postretirement benefit plans are amortized on a straight line basis over the average remaining years of service to eligibility for eligible plan participants, which is approximately 5 years.
	The expected return on plan assets component of net periodic benefit cost is calculated using the market-related value of plan assets. For our pension plans, the market-related value of plan assets is equal to the fair value of plan assets adjusted to reflect the amortization of gains or losses associated with the difference between the expected and actual return on plan assets over a 5-year period. Additionally, the market-related value of assets may be no more than 110 percent or less than 90 percent of the fair value of plan assets at the beginning of the year. The market-related value of plan assets for our other postretirement benefit plans is equal to the unadjusted fair value of plan assets at the beginning of the year.
Income taxes	'
	Income taxes
	We include the operations of our domestic corporate subsidiaries and income from our domestic subsidiary partnerships in our consolidated federal income tax return and also file tax returns in various foreign and state jurisdictions as required. Deferred income taxes are computed using the liability method and are provided on all temporary differences between the financial basis and the tax basis of our assets and liabilities. Our management’s judgment and income tax assumptions are used to determine the levels, if any, of valuation allowances associated with deferred tax assets.
Earnings (loss) per common share	'
	Earnings (loss) per common share
	Basic earnings (loss) per common share in the Consolidated Statement of Income is based on the sum of the weighted-average number of common shares outstanding and vested restricted stock units. Diluted earnings (loss) per common share in the Consolidated Statement of Income includes any dilutive effect of stock options, nonvested restricted stock units, and convertible debt, unless otherwise noted. Beginning in 2012, we have unvested service-based restricted stock units that contain a nonforfeitable right to dividends during the vesting period and are considered participating securities. Basic and diluted earnings (loss) per common share are calculated using the two-class method and the treasury-stock method. Whichever method results in the most dilutive earnings (loss) per common share is reported.
Foreign currency translation	'
	Foreign currency translation
	Certain of our foreign subsidiaries use the Canadian dollar as their functional currency. Assets and liabilities of such foreign subsidiaries are translated at the spot rate in effect at the applicable reporting date, and the combined statements of income are translated into the U.S. dollar at the average exchange rates in effect during the applicable period. The resulting cumulative translation adjustment is recorded as a separate component of AOCI.
	Transactions denominated in currencies other than the functional currency are recorded based on exchange rates at the time such transactions arise. Subsequent changes in exchange rates when the transactions are settled result in transaction gains and losses which are reflected in the Consolidated Statement of Income.

General_Description_of_Busines1

General, Description of Business, and Basis of Presentation General, Description of Business, and Basis of Presentation (Tables)	12 Months Ended
	Dec. 31, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Regulatory Assets and Liabilities [Table Text Block]	'
	Our current and noncurrent regulatory asset and liability balances for the years ended December 31, 2013 and 2012 are as follows:
		December 31,
		2013		2012
		(Millions)
	Current assets reported within Other current assets and deferred charges	$	39	$	39
	Noncurrent assets reported within Regulatory assets, deferred charges, and other	353		366
	Total regulated assets	$	392	$	405
	Current liabilities reported within Accrued liabilities	$	19	$	15
	Noncurrent liabilities reported within Other noncurrent liabilities	329		250
	Total regulated liabilities	$	348	$	265

Acquisitions_Goodwill_and_Othe1

Acquisitions Goodwill and Other Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2013
Business Combinations [Abstract]	'
Schedule of Business Acquisitions, by Acquisition [Table Text Block]	'
	The following table presents the allocation of the acquisition-date fair value of the major classes of the net assets, which are included in the Williams Partners segment:
		Laser			Caiman
		(Millions)
	Assets held-for-sale	$	18		$	—
	Other current assets	3			16
	Property, plant, and equipment	158			656
	Intangible assets:
	Customer contracts	316			1,141
	Customer relationships	—			250
	Other	2			2
	Current liabilities	(21		)	(94		)
	Noncurrent liabilities	—			(3		)
	Identifiable net assets acquired	476			1,968
	Goodwill	290			356
		$	766		$	2,324
Schedule of Finite-Lived Intangible Assets [Table Text Block]	'
	The gross carrying amount and accumulated amortization of Other intangible assets at December 31 are as follows:
		2013						2012
		Gross Carrying Amount			Accumulated Amortization			Gross Carrying Amount		Accumulated Amortization
		(Millions)
	Customer contracts	$	1,493		$	(88	)	$	1,493	$	(38	)
	Customer relationships	250			(14		)	250		(6		)
	Other	6			(3		)	6		(1		)
	Total	$	1,749		$	(105	)	$	1,749	$	(45	)

Variable_Interest_Entities_Tab

Variable Interest Entities (Tables)	12 Months Ended
	Dec. 31, 2013
Variable Interest Entity Disclosures [Abstract]	'
Schedule of Variable Interest Entities [Table Text Block]	'
	The following table presents amounts included in our Consolidated Balance Sheet that are for the use or obligation of these VIEs, which are joint projects in the development and construction phase:
		December 31,
		2013			2012			Classification
		(Millions)
	Assets (liabilities):
	Cash and cash equivalents	$	122		$	8		Cash and cash equivalents
	Construction in progress	1,111			556			Property, plant and equipment, at cost
	Accounts payable	(145		)	(128		)	Accounts payable
	Construction retainage	(3		)	—			Accrued liabilities
	Current deferred revenue	(10		)	—			Accrued liabilities
	Noncurrent deferred revenue associated with customer advance payments	(115		)	(109		)	Other noncurrent liabilities

Discontinued_Operations_Tables

Discontinued Operations (Tables)	12 Months Ended
	Dec. 31, 2013
Discontinued Operations and Disposal Groups [Abstract]	'
Summarized Results of Discontinued Operations	'
	Summarized Results of Discontinued Operations
		Years Ended December 31,
		2013			2012			2011
		(Millions)
	Revenues	$	—		$	—		$	3,997
	Income (loss) from discontinued operations before gain on reconsolidation, impairments, and income taxes	$	(15	)	$	(16	)	$	223
	Gain on reconsolidation	—			144			—
	Impairments	—			—			(755		)
	(Provision) benefit for income taxes	4			8			115
	Income (loss) from discontinued operations	$	(11	)	$	136		$	(417	)
	Income (loss) from discontinued operations:
	Attributable to noncontrolling interests	$	—		$	—		$	10
	Attributable to The Williams Companies, Inc.	$	(11	)	$	136		$	(427	)
Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance [Text Block]	'
	Energy Commodity Derivatives Gains and Losses
	The following table presents pre-tax gains and losses for our former exploration and production business’ energy commodity derivatives.
		Year Ended			Classification
		December 31, 2011
		(Millions)
	Designated as cash flow hedges:
	Net gain (loss) recognized in other comprehensive income (loss) (effective portion)	$	413		AOCI
	Net gain (loss) reclassified from accumulated other comprehensive income (loss) into income (effective portion)	$	332		Income (loss) from
					discontinued
					operations
	Not designated as cash flow hedges:
	Gain (loss) recognized in income	$	30		Income (loss) from
					discontinued
					operations

Investing_Activities_Tables

Investing Activities (Tables)	12 Months Ended
	Dec. 31, 2013
Investing Activities (Tables) [Abstract]	'
Investing income [Table Text Block]	'
	Investing Income
		Years Ended December 31,
		2013			2012			2011
		(Millions)
	Equity earnings (losses) (1)	$	134		$	111		$	155
	Income (loss) from investments (1)	28			49			7
	Interest income and other	53			28			6
	Total investing income	$	215		$	188		$	168
	__________
	-1	Items also included in Segment profit (loss). (See Note 18 – Segment Disclosures.)
Investments [Table Text Block]	'
	Investments
		December 31,
		2013			2012
		(Millions)
	Equity method:
	Access Midstream Partners — 24%	$	2,161		$	2,187
	Overland Pass Pipeline Company LLC (OPPL) — 50%	452			454
	Gulfstream — 50%	333			348
	Discovery Producer Services LLC (Discovery) — 60% (1)	527			350
	Laurel Mountain — 51% (1)	481			444
	Caiman II — 47.5%	256			67
	Other	150			137
		$	4,360		$	3,987
	_________
	-1	We account for these investments under the equity method due to the significant participatory rights of our partners such that we do not control or are otherwise not the primary beneficiary of the investments.
Dividends and distributions [Table Text Block]	'
		2013			2012			2011
		(Millions)
	Access Midstream Partners	$	93		$	—		$	—
	Gulfstream	81			79			84
	Discovery	12			21			40
	Aux Sable Liquid Products L.P.	20			28			35
	OPPL	27			28			19
Summarized Financial Position and Results of Operations of Equity Method Investments [Table Text Block]	'
	Summarized Financial Position and Results of Operations of All Equity-Method Investments
		December 31,
		2013			2012
		(Millions)
	Assets (liabilities):
	Current assets	$	689		$	582
	Noncurrent assets	13,621			11,571
	Current liabilities	(573		)	(507		)
	Noncurrent liabilities	(4,563		)	(3,807		)
	Noncontrolling interest	(254		)	(112		)
		Years Ended December 31,
		2013			2012			2011
		(Millions)
	Gross revenue	$	2,406		$	1,821		$	1,808
	Operating income	699			557			747
	Net income	627			488			654

Other_Income_and_Expense_Table

Other Income and Expense (Tables)	12 Months Ended
	Dec. 31, 2013
Other Income and Expenses [Abstract]	'
Other Income and Expense	'
	The following table presents significant gains or losses reflected in Other (income) expense – net within Costs and expenses:
		Years Ended December 31,
		2013			2012			2011
		(Millions)
	Williams Partners
	Net insurance recoveries associated with the Geismar Incident	$	(40	)	$	—		$	—
	Amortization of regulatory assets associated with asset retirement obligations	30			7			6
	Write-off of the Eminence abandonment regulatory asset not recoverable through rates	12			—			—
	Insurance recoveries associated with the Eminence abandonment	(16		)	—			—
	Settlement in principle of a producer claim	25			—			—
	Project feasibility costs	4			21			10
	Capitalization of project feasibility costs previously expensed	(1		)	(19		)	(11		)
	Williams NGL & Petchem Services
	Gulf Liquids litigation contingency accrual reduction (see Note 17)	—			—			(19		)
	Write-off of an abandoned project	20			—			—

Provision_Benefit_for_Income_T1

Provision (Benefit) for Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2013
Income Tax Expense (Benefit), Continuing Operations [Abstract]	'
Provision (benefit) for income taxes from continuing operations	'
	The Provision (benefit) for income taxes from continuing operations includes:
		Years Ended December 31,
		2013			2012			2011
		(Millions)
	Current:
	Federal	$	(17	)	$	91		$	181
	State	7			17			13
	Foreign	(13		)	40			(6		)
		(23		)	148			188
	Deferred:
	Federal	348			220			(61		)
	State	40			(13		)	(14		)
	Foreign	36			5			11
		424			212			(64		)
	Total provision (benefit)	$	401		$	360		$	124
Provision for income taxes from continuing operations at federal statutory rate	'
	Reconciliations from the Provision (benefit) for income taxes from continuing operations at the federal statutory rate to the recorded Provision (benefit) for income taxes are as follows:
		Years Ended December 31,
		2013			2012			2011
		(Millions)
	Provision (benefit) at statutory rate	$	378		$	451		$	421
	Increases (decreases) in taxes resulting from:
	Impact of nontaxable noncontrolling interests	(78		)	(72		)	(96		)
	State income taxes (net of federal benefit)	26			2			11
	Foreign operations — net	(32		)	(36		)	(14		)
	Federal settlements	—			—			(109		)
	International revised assessments	—			—			(38		)
	Taxes on undistributed earnings of foreign subsidiaries - net	99			—			(66		)
	Other — net	8			15			15
	Provision (benefit) for income taxes	$	401		$	360		$	124
Deferred tax liabilities and Deferred tax assets	'
	Significant components of deferred tax liabilities and deferred tax assets are as follows:
		December 31,
		2013			2012
		(Millions)
	Deferred tax liabilities:
	Property, plant, and equipment	$	102		$	72
	Undistributed earnings of foreign subsidiaries	75			—
	Investments	3,663			3,146
	Other	—			34
	Total deferred tax liabilities	3,840			3,252
	Deferred tax assets:
	Accrued liabilities	126			313
	Federal tax credits	108			74
	State losses and credits	194			195
	Other	91			90
	Total deferred tax assets	519			672
	Less valuation allowance	181			144
	Net deferred tax assets	338			528
	Overall net deferred tax liabilities	$	3,502		$	2,724
Reconciliation of beginning and ending amount of unrecognized tax benefits	'
	A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows:
		2013			2012
		(Millions)
	Balance at beginning of period	$	58		$	38
	Additions based on tax positions related to the current year	4			4
	Additions for tax positions of prior years	18			22
	Reductions for tax positions of prior years	(2		)	(6		)
	Settlement with taxing authorities	(12		)	—
	Balance at end of period	$	66		$	58

Earnings_Loss_Per_Common_Share1

Earnings (Loss) Per Common Share from Continuing Operations (Tables)	12 Months Ended
	Dec. 31, 2013
Earnings Per Share [Abstract]	'
Earnings (loss) per common share from continuing operations	'
		Years Ended December 31,
		2013		2012		2011
		(Dollars in millions, except per-share
		amounts; shares in thousands)
	Income (loss) from continuing operations attributable to The Williams Companies, Inc. available to common stockholders for basic and diluted earnings (loss) per common share	$	441	$	723	$	803
	Basic weighted-average shares	682,948		619,792		588,553
	Effect of dilutive securities:
	Nonvested restricted stock units	1,995		2,694		4,332
	Stock options	2,149		2,608		3,374
	Convertible debentures	93		392		1,916
	Diluted weighted-average shares	687,185		625,486		598,175
	Earnings (loss) per common share from continuing operations:
	Basic	$	0.65	$	1.17	$	1.36
	Diluted	$	0.64	$	1.15	$	1.34

Employee_Benefit_Plans_Tables

Employee Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2013
Compensation and Retirement Disclosure [Abstract]	'
Changes in benefit obligations and plan assets [Table Text Block]	'
	The following table presents the changes in benefit obligations and plan assets for pension benefits and other postretirement benefits for the years indicated.
		Pension Benefits								Other
										Postretirement
										Benefits
		2013				2012				2013				2012
		(Millions)
	Change in benefit obligation:
	Benefit obligation at beginning of year	$	1,549			$	1,441			$	331			$	339
	Service cost	44				39				2				3
	Interest cost	51				55				11				13
	Plan participants’ contributions	—				—				6				5
	Benefits paid	(87		)		(75		)		(19		)		(20		)
	Medicare Part D subsidy	—				—				4				3
	Plan amendment	—				—				(59		)		(6		)
	Actuarial loss (gain)	(173		)		98				(63		)		(6		)
	Settlements	—				(9		)		—				—
	Benefit obligation at end of year	1,384				1,549				213				331
	Change in plan assets:
	Fair value of plan assets at beginning of year	1,071				965				175				159
	Actual return on plan assets	165				111				31				18
	Employer contributions	92				79				8				13
	Plan participants’ contributions	—				—				6				5
	Benefits paid	(87		)		(75		)		(19		)		(20		)
	Settlements	—				(9		)		—				—
	Fair value of plan assets at end of year	1,241				1,071				201				175
	Funded status — underfunded	$	(143	)		$	(478	)		$	(12	)		$	(156	)
	Accumulated benefit obligation	$	1,359			$	1,519
Underfunded status of our pension plans and other postretirement benefit plans [Table Text Block]	'
	The underfunded status of our pension plans and other postretirement benefit plans presented in the previous table are recognized in the Consolidated Balance Sheet within the following accounts:
		December 31,
		2013				2012
		(Millions)
	Underfunded pension plans:
	Current liabilities	$	1			$	3
	Noncurrent liabilities	142				475
	Underfunded other postretirement benefit plans:
	Current liabilities	8				8
	Noncurrent liabilities	4				148
Pre-tax amounts not yet recognized in net periodic benefit cost [Table Text Block]	'
	Pre-tax amounts not yet recognized in Net periodic benefit cost at December 31 are as follows:
		Pension Benefits								Other
										Postretirement
										Benefits
		2013				2012				2013				2012
		(Millions)
	Amounts included in Accumulated other comprehensive income (loss):
	Prior service (cost) credit	$	—			$	(1	)		$	26			$	7
	Net actuarial loss	(491		)		(828		)		(11		)		(35		)
	Amounts included in regulatory assets/liabilities associated with Transco and Northwest Pipeline:
	Prior service credit	N/A				N/A				$	42			$	14
	Net actuarial loss	N/A				N/A				(2		)		(67		)
Schedule of Net Benefit Costs [Table Text Block]	'
	Net periodic benefit cost for the years ended December 31 consist of the following:
		Pension Benefits												Other
														Postretirement  Benefits
		2013				2012				2011				2013				2012			2011
		(Millions)
	Components of net periodic benefit cost:
	Service cost	$	44			$	39			$	41			$	2			$	3		$	2
	Interest cost	51				55				64				11				13			15
	Expected return on plan assets	(61		)		(64		)		(77		)		(9		)		(9		)	(10		)
	Amortization of prior service cost (credit)	1				1				1				(12		)		(7		)	(11		)
	Amortization of net actuarial loss	60				53				38				4				8			3
	Net actuarial loss from settlements	—				5				4				—				—			—
	Reclassification to regulatory liability	—				—				—				2				—			1
	Net periodic benefit cost	$	95			$	89			$	71			$	(2	)		$	8		$	—
Other changes in plan assets and benefit obligations recognized in other comprehensive income (loss) [Table Text Block]	'
	Other changes in plan assets and benefit obligations recognized in Other comprehensive income (loss) before taxes for the years ended December 31 consist of the following:
		Pension Benefits												Other
														Postretirement  Benefits
		2013				2012				2011				2013				2012			2011
		(Millions)
	Other changes in plan assets and benefit obligations recognized in Other comprehensive income (loss):
	Net actuarial gain (loss)	$	277			$	(51	)		$	(220	)		$	23			$	2		$	(21	)
	Prior service credit	—				—				—				23				2			2
	Amortization of prior service cost (credit)	1				1				1				(4		)		(3		)	(4		)
	Amortization of net actuarial loss and loss from settlements	60				58				42				1				3			1
	Other changes in plan assets and benefit obligations recognized in Other comprehensive income (loss)	$	338			$	8			$	(177	)		$	43			$	4		$	(22	)
Schedule of Regulatory Assets / Liabilities [Table Text Block]	'
	Other changes in plan assets and benefit obligations for our other postretirement benefit plans associated with Transco and Northwest Pipeline are recognized in regulatory assets/liabilities. Amounts recognized in regulatory assets/ liabilities for the years ended December 31 consist of the following:
			2013				2012				2011
			(Millions)
	Net actuarial gain (loss)		$	62			$	13			$	(39	)
	Prior service credit		36				4				1
	Amortization of prior service credit		(8		)		(4		)		(7		)
	Amortization of net actuarial loss		3				5				2
Pre-tax amounts expected to be amortized in net periodic benefit cost [Table Text Block]	'
	Pre-tax amounts expected to be amortized in Net periodic benefit cost in 2014 are as follows:
		Pension				Other
		Benefits				Postretirement
						Benefits
		(Millions)
	Amounts included in Accumulated other comprehensive income (loss):
	Prior service cost (credit)	$	—			$	(8	)
	Net actuarial loss	38				—
	Amounts included in regulatory assets/liabilities associated with Transco and Northwest Pipeline:
	Prior service credit	N/A				$	(12	)
	Net actuarial loss	N/A				—
Schedule of Assumptions Used [Table Text Block]	'
	The weighted-average assumptions utilized to determine benefit obligations as of December 31 are as follows:
		Pension Benefits						Other
								Postretirement
								Benefits
		2013			2012			2013			2012
	Discount rate	4.68	%		3.43	%		4.8	%		3.77	%
	Rate of compensation increase	4.56			4.57			N/A			N/A
	The weighted-average assumptions utilized to determine Net periodic benefit cost for the years ended December 31 are as follows:
		Pension Benefits									Other
											Postretirement  Benefits
		2013			2012			2011			2013			2012			2011
	Discount rate	3.43	%		3.98	%		5.19	%		3.97	%		4.22	%		5.35	%
	Expected long-term rate of return on plan assets	5.9			6.3			7.5			5.26			5.71			6.54
	Rate of compensation increase	4.57			4.52			5			N/A			N/A			N/A
One percentage point change in assumed health care cost trend rates effects [Table Text Block]	'
	A one-percentage-point change in assumed health care cost trend rates would have the following effects:
		Point increase				Point decrease
		(Millions)
	Effect on total of service and interest cost components	$	1			$	(1	)
	Effect on other postretirement benefit obligation	7				(6		)
Fair values of plan assets [Table Text Block]	'
	The fair values of our pension plan assets at December 31, 2013 and 2012 by asset class are as follows:
		2013
		Quoted Prices				Significant				Significant				Total
		in Active				Other				Unobservable
		Markets for				Observable				Inputs
		Identical				Inputs				(Level 3)
		Assets				(Level 2)
		(Level 1)
		(Millions)
	Pension assets:
	Cash management fund	$	23			$	—			$	—			$	23
	Equity securities:
	U.S. large cap	211				—				—				211
	U.S. small cap	146				—				—				146
	International developed markets large cap growth	—				59				—				59
	Preferred stock	2				—				—				2
	Commingled investment funds:
	Equities — U.S. large cap (1)	—				179				—				179
	Equities — International small cap (2)	—				24				—				24
	Equities — Emerging markets value (3)	—				34				—				34
	Equities — Emerging markets growth (4)	—				19				—				19
	Equities — International developed markets large cap value (5)	—				100				—				100
	Fixed income — Corporate bonds (6)	—				140				—				140
	Fixed income securities (7):
	U.S. Treasury securities	30				—				—				30
	Mortgage-backed securities	—				67				—				67
	Corporate bonds	—				200				—				200
	Insurance company investment contracts and other	—				7				—				7
	Total assets at fair value at December 31, 2013	$	412			$	829			$	—			$	1,241
		2012
		Quoted Prices				Significant				Significant				Total
		in Active				Other				Unobservable
		Markets for				Observable				Inputs
		Identical				Inputs				(Level 3)
		Assets				(Level 2)
		(Level 1)
		(Millions)
	Pension assets:
	Cash management fund	$	21			$	—			$	—			$	21
	Equity securities:
	U.S. large cap	169				—				—				169
	U.S. small cap	115				—				—				115
	International developed markets large cap growth	1				61				—				62
	Emerging markets growth	3				18				—				21
	Preferred stock	6				—				—				6
	Commingled investment funds:
	Equities — U.S. large cap (1)	—				146				—				146
	Equities — Emerging markets value (3)	—				33				—				33
	Equities — International developed markets large cap value (5)	—				83				—				83
	Fixed income — Corporate bonds (6)	—				150				—				150
	Fixed income securities (7):
	U.S. Treasury securities	22				—				—				22
	Mortgage-backed securities	—				68				—				68
	Corporate bonds	—				171				—				171
	Insurance company investment contracts and other	—				4				—				4
	Total assets at fair value at December 31, 2012	$	337			$	734			$	—			$	1,071
	The fair values of our other postretirement benefits plan assets at December 31, 2013 and 2012 by asset class are as follows:
		2013
		Quoted Prices				Significant				Significant				Total
		in Active				Other				Unobservable
		Markets for				Observable				Inputs
		Identical				Inputs				(Level 3)
		Assets				(Level 2)
(Level 1)
	(Millions)
Other postretirement benefit assets:
Cash management funds	$	13			$	—			$	—			$	13
Equity securities:
U.S. large cap	52				—				—				52
U.S. small cap	29				—				—				29
International developed markets large cap growth	—				15				—				15
Emerging markets growth	1				1				—				2
Commingled investment funds:
Equities — U.S. large cap (1)	—				18				—				18
Equities — International small cap (2)	—				2				—				2
Equities — Emerging markets value (3)	—				4				—				4
Equities — Emerging markets growth (4)	—				2				—				2
Equities — International developed markets large cap value (5)	—				10				—				10
Fixed income — Corporate bonds (6)	—				14				—				14
Fixed income securities (8):
U.S. Treasury securities	3				—				—				3
Government and municipal bonds	—				10				—				10
Mortgage-backed securities	—				7				—				7
Corporate bonds	—				20				—				20
Total assets at fair value at December 31, 2013	$	98			$	103			$	—			$	201
	2012
	Quoted Prices				Significant				Significant				Total
	in Active				Other				Unobservable
	Markets for				Observable				Inputs
	Identical				Inputs				(Level 3)
	Assets				(Level 2)
	(Level 1)
	(Millions)
Other postretirement benefit assets:
Cash management funds	$	14			$	—			$	—			$	14
Equity securities:
U.S. large cap	42				—				—				42
U.S. small cap	21				—				—				21
International developed markets large cap growth	—				13				—				13
Emerging markets growth	1				4				—				5
Preferred stock	1				—				—				1
Commingled investment funds:
Equities — U.S. large cap (1)	—				15				—				15
Equities — Emerging markets value (3)	—				3				—				3
Equities — International developed markets large cap value (5)	—				9				—				9
Fixed income — Corporate bonds (6)	—				15				—				15
Fixed income securities (8):
U.S. Treasury securities	2				—				—				2
Government and municipal bonds	—				10				—				10
Mortgage-backed securities	—				7				—				7
Corporate bonds	—				18				—				18
Total assets at fair value at December 31, 2012	$	81			$	94			$	—			$	175
____________
-1	The stated intent of this fund is to invest primarily in equity securities comprising the Standard & Poor’s 500 Index. The investment objective of the fund is to approximate the performance of the Standard & Poor’s 500 Index over the long term. The fund manager retains the right to restrict withdrawals from the fund so as not to disadvantage other investors in the fund.
-2	The stated intent of this fund is to invest in equity securities of international small capitalization companies for the purpose of capital appreciation. The fund invests primarily in equity securities of non-U.S. issuers and other Depository Receipts listed on globally recognized exchanges. The fund may also invest up to 15 percent of its net asset value in emerging markets. The plans’ trustee is required to notify the fund manager 10 days prior to a withdrawal from the fund. For any redemption made within 180 days of contribution, the fund reserves the right to charge a 1.5 percent redemption fee. The fund also reserves the right to make all or a portion of redemptions in-kind rather than in cash or in a combination of cash and in-kind.
-3	The stated intent of this fund is to invest in equity securities of international emerging markets for the purpose of capital appreciation. The fund invests primarily in common stocks in the financial, consumer goods, information technology, energy, telecommunications, materials, and industrial sectors. The plans’ trustee is required to notify the fund manager 10 days prior to a withdrawal from the fund. The fund manager retains the right to restrict withdrawals from the fund so as not to disadvantage other investors in the fund.
-4	The stated intent of this fund is to invest mainly in equity securities of emerging market companies, or those companies that derive a significant portion of their revenues or profits from emerging economies for the purpose of long-term capital growth. The plans’ trustee is required to notify the fund manager 15 days prior to a withdrawal from the fund as of the last day of any month. The fund reserves the right to suspend and compel withdrawals. The fund also reserves the right to make all or a portion of redemptions in-kind rather than in cash or in a combination of cash and in-kind.
-5	The stated intent of this fund is to invest in a diversified portfolio of international equity securities for the purpose of capital appreciation. The fund invests primarily in common stocks in the consumer goods, financial, health care, industrial, materials, energy, and information technology sectors. The plans’ trustee is required to notify the fund manager 10 days prior to a withdrawal from the fund. The fund manager retains the right to restrict withdrawals from the fund so as not to disadvantage other investors in the fund.
-6	The stated intent of this fund is to invest in U.S. Corporate bonds and U.S. Treasury securities. The fund is managed to closely match the characteristics of a long-term corporate bond index fund and seeks to maintain an average credit quality target of A- or above and a maximum 10 percent allocation to BBB rated securities. The fund’s target duration is approximately 20 years. The trustee of the fund reserves the right to delay the processing of deposits or withdrawals in order to ensure that securities transactions will be carried out in an orderly manner.
-7	The weighted-average credit quality rating of the pension assets fixed income security portfolio is investment grade with a weighted-average duration of approximately 6 years for 2013 and 2012.
-8	The weighted-average credit quality rating of the other postretirement benefit assets fixed income security portfolio is investment grade with a weighted-average duration of approximately 5 years for 2013 and 2012.
Expected benefit payments [Table Text Block]	'
	Following are the expected benefits to be paid by the plans. These estimates are based on the same assumptions previously discussed and reflect future service as appropriate. The actuarial assumptions are based on long-term expectations and include, but are not limited to, assumptions as to average expected retirement age and form of benefit payment. Actual benefit payments could differ significantly from expected benefit payments if near-term participant behaviors differ significantly from the actuarial assumptions.
		Pension				Other
		Benefits				Postretirement
						Benefits
		(Millions)
	2014	$	88			$	15
	2015	96				15
	2016	102				16
	2017	103				16
	2018	109				17
	2019-2023	591				74

Inventories_Tables

Inventories (Tables)	12 Months Ended
	Dec. 31, 2013
Inventory, Net [Abstract]	'
Inventories	'
		December 31,
		2013		2012
		(Millions)
	Natural gas liquids, olefins, and natural gas in underground storage	$	111	$	97
	Materials, supplies, and other	83		78
		$	194	$	175

Property_Plant_and_Equipment_T

Property, Plant, and Equipment (Tables)	12 Months Ended
	Dec. 31, 2013
Property, Plant and Equipment [Abstract]	'
Property, Plant, and Equipment [Table Text Block]	'
		Estimated		Depreciation
		Useful Life  (1)		Rates (1)	December 31,
		(Years)		(%)	2013			2012
					(Millions)
	Nonregulated:
	Natural gas gathering and processing facilities	May-40			$	9,185		$	7,727
	Construction in progress	Not applicable			3,123			1,997
	Other	3 - 45			1,316			1,103
	Regulated:
	Natural gas transmission facilities			1.20 - 6.97	10,633			9,963
	Construction in progress			Not applicable	273			337
	Other			1.35 - 33.33	1,293			1,419
	Total property, plant, and equipment, at cost				25,823			22,546
	Accumulated depreciation and amortization				(7,613		)	(7,079		)
	Property, plant, and equipment — net				$	18,210		$	15,467
	__________
	-1	Estimated useful life and depreciation rates are presented as of December 31, 2013. Depreciation rates for regulated assets are prescribed by the FERC.
Asset Retirement Obligation [Table Text Block]	'
		December 31,
		2013			2012
		(Millions)
	Beginning balance	$	579		$	573
	Liabilities incurred	8			8
	Liabilities settled (1)	(31		)	(44		)
	Accretion expense	53			43
	Revisions (2)	(48		)	(1		)
	Ending balance	$	561		$	579
	______________
	-1	For 2013 and 2012, liabilities settled include $25 million and $31 million, respectively, related to the abandonment of certain of Transco’s natural gas storage caverns that are associated with a leak in 2010.
	-2	Several factors are considered in the annual review process, including inflation rates, current estimates for removal cost, discount rates, and the estimated remaining life of the assets. The 2013 revision primarily reflects increases in the estimated remaining useful life of the assets. The 2012 revision primarily reflects a decrease in removal cost estimates. The 2013 and 2012 revisions also include increases of $9 million and $13 million, respectively, related to changes in the timing and method of abandonment on certain of Transco’s natural gas storage caverns that were associated with a leak in 2010.

Accrued_Liabilities_Tables

Accrued Liabilities (Tables)	12 Months Ended
	Dec. 31, 2013
Accrued Liabilities, Current [Abstract]	'
Accrued Liabilities [Table Text Block]	'
		December 31,
		2013		2012
		(Millions)
	Interest on debt	$	167	$	148
	Employee costs	127		137
	Estimated rate refund liability	98		—
	Asset retirement obligations	64		68
	Other, including other loss contingencies	341		275
		$	797	$	628

Debt_Banking_Arrangements_and_1

Debt, Banking Arrangements, and Leases (Tables)	12 Months Ended
	Dec. 31, 2013
Debt Disclosure [Abstract]	'
Schedule of Long-term Debt Instruments [Table Text Block]	'
	Long-Term Debt
		December 31,
		2013			2012
		(Millions)
	Unsecured:
	Transco:
	6.4% Notes due 2016	$	200		$	200
	6.05% Notes due 2018	250			250
	7.08% Debentures due 2026	8			8
	7.25% Debentures due 2026	200			200
	5.4% Notes due 2041	375			375
	4.45% Notes due 2042	400			400
	Northwest Pipeline:
	7% Notes due 2016	175			175
	5.95% Notes due 2017	185			185
	6.05% Notes due 2018	250			250
	7.125% Debentures due 2025	85			85
	WPZ:
	3.8% Notes due 2015	750			750
	7.25% Notes due 2017	600			600
	5.25% Notes due 2020	1,500			1,500
	4.125% Notes due 2020	600			600
	4% Notes due 2021	500			500
	3.35% Notes due 2022	750			750
	4.5% Notes due 2023	600			—
	6.3% Notes due 2040	1,250			1,250
	5.8% Notes due 2043	400			—
	Credit facility loans	—			375
	The Williams Companies, Inc.:
	7.875% Notes due 2021	371			371
	3.7% Notes due 2023	850			850
	7.5% Debentures due 2031	339			339
	7.75% Notes due 2031	252			252
	8.75% Notes due 2032	445			445
	Various — 5.5% to 10.25% Notes and Debentures due 2019 to 2033	55			57
	Other, including secured capital lease obligations	1			2
	Net unamortized debt discount	(37		)	(33		)
	Total long-term debt, including current portion	11,354			10,736
	Long-term debt due within one year	(1		)	(1		)
	Long-term debt	$	11,353		$	10,735
Schedule of Maturities of Long-term Debt [Table Text Block]	'
	The following table presents aggregate minimum maturities of long-term debt (excluding net unamortized discount) for each of the next five years:
		December 31, 2013
		(Millions)
	2014	$	—
	2015	750
	2016	375
	2017	785
	2018	500
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]	'
	The future minimum annual rentals under noncancelable operating leases, are payable as follows:
		December 31, 2013
		(Millions)
	2014	$	53
	2015	47
	2016	43
	2017	36
	2018	30
	Thereafter	123
	Total	$	332

Stockholders_Equity_Tables

Stockholders' Equity (Tables)	12 Months Ended
	Dec. 31, 2013
Stockholders' Equity Note [Abstract]	'
Accumulated Other Comprehensive Income (Loss) [Table Text Block]	'
	The following table presents the changes in AOCI by component, net of income taxes:
		Cash				Foreign			Pension and			Total
		Flow				Currency			Other Post
		Hedges				Translation			Retirement
									Benefits
		(Millions)
	Balance at December 31, 2012	$	(1	)		$	169		$	(530	)	$	(362	)
	Other comprehensive income (loss) before reclassifications	1				(41		)	203			163
	Amounts reclassified from accumulated other comprehensive income (loss)	(1		)		—			36			35
	Other comprehensive income (loss)	—				(41		)	239			198
	Balance at December 31, 2013	$	(1	)		$	128		$	(291	)	$	(164	)
Reclassifications Out Of Accumulated Other Comprehensive Income [Table Text Block]	'
	Reclassifications out of AOCI are presented in the following table by component for the year ended December 31, 2013:
	Component		Reclassifications				Classification
			(Millions)
	Cash flow hedges:
	Energy commodity contracts		$	(1	)		Product sales
	Total cash flow hedges		(1		)
	Pension and other postretirement benefits:
	Amortization of prior service cost (credit) included in net periodic benefit cost		(3		)		Note 9 – Employee Benefit Plans
	Amortization of actuarial (gain) loss included in net periodic benefit cost		61				Note 9 – Employee Benefit Plans
	Total pension and other postretirement benefits		58
	Reclassifications before income tax		57
	Income tax benefit		(22		)		Provision (benefit) for income taxes
	Reclassifications during the period		$	35

StockBased_Compensation_Tables

Stock-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2013
Share-based Compensation [Abstract]	'
Summary of stock option activity and related information	'
	The following summary reflects stock option activity and related information for the year ended December 31, 2013:
	Stock Options	Options			Weighted-				Aggregate
					Average				Intrinsic
					Exercise				Value
					Price
		(Millions)							(Millions)
	Outstanding at December 31, 2012	6.9			$	19.1
	Granted	0.9			$	33.57
	Exercised	(1.1	)		$	13.34
	Outstanding at December 31, 2013	6.7			$	21.82			$	112
	Exercisable at December 31, 2013	5			$	18.7			$	98
Estimated fair value at date of grant of options for common stock granted	'
	The estimated fair value at date of grant of options for our common stock granted in each respective year, using the Black-Scholes option pricing model, is as follows:
		2013				2012				2011
	Weighted-average grant date fair value of options for our common stock granted during the year, per share	$	5.94			$	5.65			$	6.28
	Weighted-average assumptions:
	Dividend yield	4.3		%		3.7		%		3.6		%
	Volatility	29.7		%		30		%		34.6		%
	Risk-free interest rate	1.4		%		1.3		%		2.8		%
	Expected life (years)	6.5				6.5				6.5
Summary of nonvested restricted stock unit activity and related information	'
	The following summary reflects nonvested restricted stock unit activity and related information for the year ended December 31, 2013.
	Restricted Stock Units Outstanding	Shares			Weighted-
					Average
					Fair Value*
		(Millions)
	Nonvested at December 31, 2012	3.9			$	22.49
	Granted	1.2			$	30.43
	Forfeited	(0.1	)		$	27.27
	Vested	(1.5	)		$	17.82
	Nonvested at December 31, 2013	3.5			$	27.16
	______________
	*	Performance-based shares are valued utilizing a Monte Carlo valuation method using measures of total shareholder return. All other shares are valued at the grant-date market price or the grant-date market price less dividends projected to be paid over the vesting period. Restricted stock units generally vest after three years.
Other restricted stock unit information	'
	Value of Restricted Stock Units	2013				2012				2011
	Weighted-average grant date fair value of restricted stock units granted during the year, per share	$	30.43			$	20.61			$	23.31
	Total fair value of restricted stock units vested during the year ($’s in millions)	$	27			$	22			$	35

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2013
Fair Value Disclosures [Abstract]	'
Fair Value Assets and Liabilities Measured On Recurring Basis [Text Block]	'
								Fair Value Measurements Using
		Carrying			Fair			Quoted		Significant			Significant
		Amount			Value			Prices In		Other			Unobservable
								Active		Observable			Inputs
								Markets for		Inputs			(Level 3)
								Identical		(Level 2)
								Assets
								(Level 1)
		(Millions)
	Assets (liabilities) at December 31, 2013:
	Measured on a recurring basis:
	ARO Trust investments	$	33		$	33		$	33	$	—		$	—
	Energy derivatives assets not designated as hedging instruments	3			3			—		—			3
	Energy derivatives liabilities not designated as hedging instruments	(3		)	(3		)	—		(1		)	(2		)
	Additional disclosures:
	Notes receivable and other	77			140			1		6			133
	Long-term debt (1)	(11,353		)	(11,971		)	—		(11,971		)	—
	Guarantee	(32		)	(29		)	—		(29		)	—
	Assets (liabilities) at December 31, 2012:
	Measured on a recurring basis:
	ARO Trust investments	$	18		$	18		$	18	$	—		$	—
	Energy derivatives assets not designated as hedging instruments	5			5			—		—			5
	Energy derivatives liabilities not designated as hedging instruments	(1		)	(1		)	—		—			(1		)
	Additional disclosures:
	Notes receivable and other	95			138			2		8			128
	Long-term debt (1)	(10,734		)	(12,388		)	—		(12,388		)	—
	Guarantee	(33		)	(31		)	—		(31		)	—
	________________
	(1) Excludes capital leases
Concentration of receivables, net of allowances, by product or service [Table Text Block]	'
	The following table summarizes concentration of receivables, net of allowances.
		December 31,
		2013			2012
		(Millions)
	NGLs, natural gas, and related products and services	$	341		$	411
	Transportation of natural gas and related products	193			170
	Income tax receivable	74			68
	Other	66			39
	Total	$	674		$	688

Segment_Disclosures_Tables

Segment Disclosures (Tables)	12 Months Ended
	Dec. 31, 2013
Segment Reporting [Abstract]	'
Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block]	'
	The following geographic area data includes Revenues from external customers based on product shipment origin and Long-lived assets based upon physical location.
				United States			Canada			Total
				(Millions)
	Revenues from external customers:
		2013	$	6,703		$	157		$	6,860
		2012		7,335			151			7,486
		2011		7,728			202			7,930
	Long-lived assets:
		2013	$	19,260		$	1,240		$	20,500
		2012		16,940			880			17,820
		2011		12,041			583			12,624
Reconciliation of segment revenues and segment profit (loss) [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 Other financial information related to Long-lived assets.
		Williams				Williams				Access			Other			Eliminations			Total
		Partners				NGL & Petchem				Midstream
						Services				Partners
		(Millions)
	2013
	Segment revenues:
	Service revenues
	External	$	2,910			$	4			$	—		$	25		$	—		$	2,939
	Internal	—				—				—			11			(11		)	—
	Total service revenues	2,910				4				—			36			(11		)	2,939
	Product sales
	External	3,775				146				—			—			—			3,921
	Internal	—				123				—			—			(123		)	—
	Total product sales	3,775				269				—			—			(123		)	3,921
	Total revenues	$	6,685			$	273			$	—		$	36		$	(134	)	$	6,860
	Segment profit (loss)	$	1,606			$	38			$	61		$	(4	)				$	1,701
	Less:
	Equity earnings (losses)	104				—				30			—						134
	Income (loss) from investments	—				(3		)		31			—						28
	Segment operating income (loss)	$	1,502			$	41			$	—		$	(4	)				1,539
	General corporate expenses																		(164		)
	Operating income (loss)																		$	1,375
	Other financial information:
	Additions to long-lived assets	$	3,055			$	649			$	—		$	27		$	—		$	3,731
	Depreciation and amortization	758				33				—			24			—			815
	2012
	Segment revenues:
	Service revenues
	External	$	2,709			$	5			$	—		$	15		$	—		$	2,729
	Internal	—				—				—			12			(12		)	—
	Total service revenues	2,709				5				—			27			(12		)	2,729
	Product sales
	External	4,611				146				—			—			—			4,757
	Internal	—				128				—			—			(128		)	—
	Total product sales	4,611				274				—			—			(128		)	4,757
	Total revenues	$	7,320			$	279			$	—		$	27		$	(140	)	$	7,486
	Segment profit (loss)	$	1,812			$	99			$	—		$	49					$	1,960
	Less:
	Equity earnings (losses)	111				—				—			—						111
	Income (loss) from investments	—				(4		)		—			53						49
	Segment operating income (loss)	$	1,701			$	103			$	—		$	(4	)				1,800
	General corporate expenses																		(188		)
	Operating income (loss)																		$	1,612
	Other financial information:
	Additions to long-lived assets	$	5,562			$	425			$	—		$	31		$	—		$	6,018
	Depreciation and amortization	714				20				—			22			—			756
		Williams				Williams				Access			Other			Eliminations			Total
		Partners				NGL & Petchem				Midstream
						Services				Partners
		(Millions)
	2011
	Segment revenues:
	Service revenues
	External	$	2,517			$	1			$	—		$	14		$	—		$	2,532
	Internal	—				—				—			11			(11		)	—
	Total service revenues	2,517				1				—			25			(11		)	2,532
	Product sales
	External	5,197				201				—			—			—			5,398
	Internal	—				139				—			—			(139		)	—
	Total product sales	5,197				340				—			—			(139		)	5,398
	Total revenues	$	7,714			$	341			$	—		$	25		$	(150	)	$	7,930
	Segment profit (loss)	$	2,035			$	157			$	—		$	24					$	2,216
Less:
Equity earnings (losses)	142				—				—			13						155
Income (loss) from investments	—				(4		)		—			11						7
Segment operating income (loss)	$	1,893			$	161			$	—		$	—					2,054
General corporate expenses																		(187		)
Operating income (loss)																		$	1,867
Other financial information:
Additions to long-lived assets	$	1,273			$	211			$	—		$	46		$	—		$	1,530
Depreciation and amortization	621				16				—			24			—			661
Total assets and equity method investments by reporting segment [Table Text Block]	'
	The following table reflects Total assets and Equity method investments by reportable segments:
			Total Assets								Equity Method Investments
			31-Dec-13				31-Dec-12				31-Dec-13			31-Dec-12
			(Millions)
	Williams Partners		$	22,358			$	19,709			$	2,187		$	1,800
	Williams NGL & Petchem Services		1,711				1,134				12			—
	Access Midstream Partners		2,161				2,187				2,161			2,187
	Other		1,625				1,782				—			—
	Eliminations		(713		)		(485		)		—			—
	Total		$	27,142			$	24,327			$	4,360		$	3,987

General_Description_of_Busines2

General, Description of Business, and Basis of Presentation (Details) (USD $)

12 Months Ended

3 Months Ended

12 Months Ended

12 Months Ended

In Millions, except Share data, unless otherwise specified

Dec. 31, 2013

Dec. 31, 2013

Sep. 30, 2013

Mar. 31, 2013

Mar. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

General and Limited Partner [Member]

Williams Partners L.P.

Williams Partners L.P.

Williams Partners L.P.

Constitution Pipeline Company LLC [Member]

Bluegrass Pipeline Company LLC [Member]

Gulfstream Natural Gas System, L.L.C.[Member]

Access Midstream Partners, GP, L.L.C.[Member]

Access Midstream Partners Lp [Member]

Pension Plan, Defined Benefit [Member]

Other Postretirement Benefit Plan, Defined Benefit [Member]

Private Placement [Member]

Defined Benefit Plan Disclosure [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

Approximate Amortization Period Of Net Actuarial Gain Loss

'

'

'

'

'

'

'

'

'

'

'12 years

'8 years

Minimum period of construction for capitalization of interest

'3 months

'

'

'

'

'

'

'

'

'

'

'

Minimum total project cost for capitalization of interest

$1

'

'

'

'

'

'

'

'

'

'

'

Schedule of Equity Method Investments [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

Equity Method Investment, Ownership Percentage

'

'

'

'

'

'

'

50.00%

50.00%

23.00%

'

'

Subsidiary of Limited Liability Company or Limited Partnership [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

Variable Interest Entity Ownership Percentage

'

'

'

'

'

41.00%

50.00%

'

'

'

'

'

Sale Of Stock Number Of Shares Issued In Transaction

'

'

24,725,000

15,937,500

3,000,000

'

'

'

'

'

'

'

Master limited partnership, ownership percentage

'

64.00%

'

'

'

'

'

'

'

'

'

'

General_Description_of_Busines3

General, Description of Business, and Basis of Presentation General, Description of Business, and Basis of Presentation (Detail1) (USD $)	Dec. 31, 2011	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2013
In Millions, unless otherwise specified		Capital in excess of par value [Member]	Noncontrolling Interests [Member]	Deferred Income Taxes [Member]
Former business, ownership percentage	100.00%	'	'	'
Noncontrolling Interest, Increase from Subsidiary Equity Issuance	'	$408	$1,169	$242

General_Description_of_Busines4

General, Description of Business, and Basis of Presentation General, Description of Business, and Basis of Presentation Details 2 (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Business Combination, Consideration Transferred [Abstract]	'	'	'
Payments to Acquire Businesses, Net of Cash Acquired	$6	$2,049	$41
Regulatory Assets and Liabilities Disclosure [Abstract]	'	'	'
Regulatory Assets, Current	39	39	'
Regulatory Assets, Noncurrent	353	366	'
Total regulatory asset	392	405	'
Regulatory Liability, Current	19	15	'
Regulatory Liability, Noncurrent	329	250	'
total regulatory liabilities	348	265	'
Common Management Transaction [Member]	'	'	'
Related Party Transaction [Line Items]	'	'	'
Revenue from Related Parties	$131	'	'

Acquisitions_Goodwill_and_Othe2

Acquisitions Goodwill and Other Intangible Assets (Details) (USD $)

12 Months Ended

2 Months Ended

4 Months Ended

12 Months Ended

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 20, 2012

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 20, 2012

Dec. 20, 2012

Feb. 17, 2012

Feb. 17, 2012

Feb. 17, 2012

Feb. 17, 2012

Apr. 27, 2012

Dec. 31, 2012

Apr. 27, 2012

Apr. 27, 2012

Apr. 27, 2012

Access Midstream Partners [Member]

Access Midstream Partners [Member]

Customer contracts [Member]

Customer contracts [Member]

Customer Relationships [Member]

Customer Relationships [Member]

Other Intangible Assets [Member]

Other Intangible Assets [Member]

Access Midstream Ventures Llc [Member]

Access Midstream Partners Lp [Member]

Laser Acquisition [Member]

Laser Acquisition [Member]

Laser Acquisition [Member]

Laser Acquisition [Member]

Caiman Acquisition [Member]

Caiman Acquisition [Member]

Caiman Acquisition [Member]

Caiman Acquisition [Member]

Caiman Acquisition [Member]

Williams Partners [Member]

Williams Partners [Member]

Williams Partners [Member]

Williams Partners [Member]

Williams Partners [Member]

Williams Partners [Member]

Williams Partners [Member]

Williams Partners [Member]

Williams Partners [Member]

Customer contracts [Member]

Customer Relationships [Member]

Other Intangible Assets [Member]

Customer contracts [Member]

Customer Relationships [Member]

Other Intangible Assets [Member]

Business Combination, Description [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Business Acquisition, Percentage of Voting Interests Acquired

'

'

'

'

'

'

'

'

'

'

'

'

'

100.00%

'

'

'

100.00%

'

'

'

'

Business Combination, Acquisition Related Costs

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$16,000,000

'

'

'

Business Combination, Consideration Transferred [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Payments to Acquire Businesses, Gross

'

'

'

'

'

'

'

'

'

'

'

'

'

325,000,000

'

'

'

1,720,000,000

'

'

'

'

Business Acquisition, Equity Interest Issued or Issuable, Number of Shares

'

'

'

'

'

'

'

'

'

'

'

'

'

7,531,381

'

'

'

11,779,296

'

'

'

'

Business Combination, Consideration Transferred, Equity Interests Issued and Issuable

'

'

'

'

'

'

'

'

'

'

'

'

'

441,000,000

'

'

'

603,000,000

'

'

'

'

Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Assets held-for-sale

'

'

'

'

'

'

'

'

'

'

'

'

'

18,000,000

'

'

'

0

'

'

'

'

Other current assets

'

'

'

'

'

'

'

'

'

'

'

'

'

3,000,000

'

'

'

16,000,000

'

'

'

'

Property, plant and equipment

'

'

'

'

'

'

'

'

'

'

'

'

'

158,000,000

'

'

'

656,000,000

'

'

'

'

Intangible assets

'

'

'

'

'

'

'

'

'

'

'

'

'

'

316,000,000

0

2,000,000

'

'

1,141,000,000

250,000,000

2,000,000

Current liabilities

'

'

'

'

'

'

'

'

'

'

'

'

'

-21,000,000

'

'

'

-94,000,000

'

'

'

'

Noncurrent liabilities

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

'

'

-3,000,000

'

'

'

'

Identifiable net assets acquired

'

'

'

'

'

'

'

'

'

'

'

'

'

476,000,000

'

'

'

1,968,000,000

'

'

'

'

Goodwill

646,000,000

649,000,000

'

'

'

'

'

'

'

'

'

'

'

290,000,000

'

'

'

356,000,000

'

'

'

'

Total

'

'

'

'

'

'

'

'

'

'

'

'

'

766,000,000

'

'

'

2,324,000,000

'

'

'

'

Business Combination, Goodwill [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Business Acquisition, Goodwill, Expected Tax Deductible Amount

'

'

'

'

'

'

'

'

'

'

'

'

'

290,000,000

'

'

'

356,000,000

'

'

'

'

Intangible Assets, Net (Excluding Goodwill) [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Gross intangible assets (excluding goodwill)

1,749,000,000

1,749,000,000

'

'

'

1,493,000,000

1,493,000,000

250,000,000

250,000,000

6,000,000

6,000,000

'

'

'

'

'

'

'

'

'

'

'

Accumulated amortization

-105,000,000

-45,000,000

'

'

'

-88,000,000

-38,000,000

-14,000,000

-6,000,000

-3,000,000

-1,000,000

'

'

'

'

'

'

'

'

'

'

'

Acquired Finite-lived Intangible Asset, Weighted Average Useful Life (years)

'

'

'

'18 years

'

'

'

'

'

'

'

'

'

'30 years

'

'

'

'30 years

'

'

'

'

Acquired Finite-lived Intangible Asset, Weighted-Average Period before Renewal or Extension

'

'

'

'

'

'

'

'

'

'

'

'

'

'9 years

'

'

'

'18 years

'

'

'

'

Amortization of Intangible Assets

60,000,000

43,000,000

2,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months

60,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Finite-Lived Intangible Assets, Amortization Expense, Year Two

60,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Finite-Lived Intangible Assets, Amortization Expense, Year Three

60,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Finite-Lived Intangible Assets, Amortization Expense, Year Four

60,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Finite-Lived Intangible Assets, Amortization Expense, Year Five

60,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Payments to Acquire Equity Method Investments

455,000,000

2,651,000,000

211,000,000

2,190,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Equity Method Investments and Joint Ventures [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Equity Method Investment, Ownership Percentage

'

'

'

'

24.00%

'

'

'

'

'

'

50.00%

24.00%

'

'

'

'

'

'

'

'

'

Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest

'

'

'

2.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Equity Method Investment, Difference Between Carrying Amount and Underlying Equity

$1,130,000,000

'

'

$1,270,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Variable_Interest_Entities_Det

Variable Interest Entities (Details) (USD $)

12 Months Ended

3 Months Ended

12 Months Ended

12 Months Ended

12 Months Ended

12 Months Ended

12 Months Ended

12 Months Ended

In Millions, unless otherwise specified

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Jun. 30, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Jan. 31, 2014

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Constitution Pipeline Company Llc [Member]

Bluegrass Pipeline Company Llc [Member]

Variable Interest Entity, Primary Beneficiary [Member]

Variable Interest Entity, Primary Beneficiary [Member]

Variable Interest Entity, Primary Beneficiary [Member]

Variable Interest Entity, Primary Beneficiary [Member]

Variable Interest Entity, Primary Beneficiary [Member]

Variable Interest Entity, Primary Beneficiary [Member]

Variable Interest Entity, Primary Beneficiary [Member]

Variable Interest Entity, Primary Beneficiary [Member]

Variable Interest Entity, Primary Beneficiary [Member]

Variable Interest Entity, Primary Beneficiary [Member]

Variable Interest Entity, Primary Beneficiary [Member]

Variable Interest Entity, Primary Beneficiary [Member]

Variable Interest Entity, Primary Beneficiary [Member]

Variable Interest Entity, Primary Beneficiary [Member]

Variable Interest Entity, Primary Beneficiary [Member]

Variable Interest Entity, Primary Beneficiary [Member]

Variable Interest Entity, Primary Beneficiary [Member]

Variable Interest Entity, Primary Beneficiary [Member]

Variable Interest Entity, Primary Beneficiary [Member]

Variable Interest Entity, Primary Beneficiary [Member]

Variable Interest Entity, Primary Beneficiary [Member]

Variable Interest Entity, Not Primary Beneficiary [Member]

Variable Interest Entity, Not Primary Beneficiary [Member]

Variable Interest Entity, Not Primary Beneficiary [Member]

Variable Interest Entity, Not Primary Beneficiary [Member]

Variable Interest Entity, Not Primary Beneficiary [Member]

Variable Interest Entity, Not Primary Beneficiary [Member]

Variable Interest Entity, Not Primary Beneficiary [Member]

Variable Interest Entity, Not Primary Beneficiary [Member]

Cash and Cash Equivalents [Member]

Cash and Cash Equivalents [Member]

Property Plant And Equipment [Member]

Property Plant And Equipment [Member]

Accounts Payable [Member]

Accounts Payable [Member]

Accrued Liabilities [Member]

Accrued Liabilities [Member]

Other Current Liabilities [Member]

Other Current Liabilities [Member]

Other Noncurrent Liabilities [Member]

Other Noncurrent Liabilities [Member]

Gulfstar One [Member]

Gulfstar One [Member]

Gulfstar One [Member]

Gunflint [Member]

Constitution Pipeline Company Llc [Member]

Constitution Pipeline Company Llc [Member]

Bluegrass Pipeline Company Llc [Member]

Bluegrass Pipeline Company Llc [Member]

Bluegrass Pipeline Company Llc [Member]

Laurel Mountain [Member]

Laurel Mountain [Member]

Caiman Energy II LLC [Member]

Caiman Energy II LLC [Member]

Caiman Energy II LLC [Member]

Moss Lake [Member]

Moss Lake [Member]

Moss Lake [Member]

Estimated Remaining Construction Costs For Variable Interest Entity [Member]

Estimated Remaining Construction Costs For Variable Interest Entity [Member]

Estimated Remaining Construction Costs For Variable Interest Entity [Member]

Estimated Remaining For Spending Under Preliminary Activities Budget [Member]

Property Plant And Equipment [Member]

Equity Method Investments [Member]

Subsequent Event [Member]

Equity Method Investments [Member]

Estimated Remaining For Spending Under Preliminary Activities Budget [Member]

Equity Method Investments [Member]

Variable Interest Entity [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Variable Interest Entity Ownership Percentage

'

'

'

41.00%

50.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

51.00%

'

'

41.00%

'

50.00%

'

'

51.00%

'

47.50%

'

'

50.00%

'

'

Other commitment

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$325

$134

'

$600

'

$85

'

'

'

'

'

'

'

$25

'

Contributions from noncontrolling interests

467

13

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

187

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

49.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Variable Interest Entity, Consolidated, Carrying Amount, Assets

'

'

'

'

'

122

8

1,111

556

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

113

'

'

'

'

'

'

'

'

Variable Interest Entity, Consolidated, Carrying Amount, Liabilities

'

'

'

'

'

'

'

'

'

-145

-128

-3

0

-10

0

-115

-109

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Variable Interest Entity, Nonconsolidated, Comparison of Carrying Amount of Assets and Liabilities to Maximum Loss Exposure [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets and Liabilities, Net

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

481

'

'

256

'

'

12

Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$481

'

$380

$500

'

'

'

'

Discontinued_Operations_Detail

Discontinued Operations (Details) (USD $)

12 Months Ended

12 Months Ended

3 Months Ended

12 Months Ended

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2011

Dec. 31, 2011

Dec. 31, 2011

Dec. 31, 2011

Dec. 31, 2011

Dec. 31, 2011

Dec. 31, 2011

Dec. 31, 2011

Dec. 31, 2011

Dec. 31, 2011

Dec. 31, 2011

Dec. 31, 2011

Dec. 31, 2011

Dec. 31, 2011

Mar. 31, 2012

Mar. 31, 2012

Mar. 31, 2012

Dec. 31, 2011

Wpx Energy Inc [Member]

Exploration and production operations [Member]

Exploration and production operations [Member]

Exploration and production operations [Member]

Exploration and production operations [Member]

Exploration and production operations [Member]

Exploration and production operations [Member]

Exploration and production operations [Member]

Exploration and production operations [Member]

Exploration and production operations [Member]

Exploration and production operations [Member]

Exploration and production operations [Member]

Exploration and production operations [Member]

Exploration and production operations [Member]

Former Venezuela Operations [Member]

Former Venezuela Operations [Member]

Former Venezuela Operations [Member]

Former power operations [Member]

Natural Gas Reserves [Member]

Natural Gas Reserves [Member]

Natural Gas Reserves [Member]

Natural Gas Reserves [Member]

Natural Gas Reserves [Member]

Powder River [Member]

Barnett Shale [Member]

Arkoma [Member]

Restructuring Charges [Member]

Investment [Member]

Investment [Member]

Investment [Member]

Investment [Member]

Minimum [Member]

Maximum [Member]

Proved Reserves [Member]

Probable Reserves [Member]

Probable Reserves [Member]

Possible Reserves [Member]

Possible Reserves [Member]

Minimum [Member]

Maximum [Member]

Fair Value, Measurements, Nonrecurring [Member]

Minimum [Member]

Maximum [Member]

Minimum [Member]

Maximum [Member]

Wpx Energy Inc [Member]

Wpx Energy Inc [Member]

Level 3 [Member]

Wpx Energy Inc [Member]

Summarized Results of Discontinued Operations

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Revenues

$0

$0

$3,997,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Income (loss) from discontinued operations before gain on reconsolidation, impairments, and income taxes

-15,000,000

-16,000,000

223,000,000

'

'

'

'

'

'

'

'

'

-42,000,000

'

'

'

'

'

'

'

'

Gain on reconsolidation

0

144,000,000

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Impairments

0

0

-755,000,000

'

'

'

'

'

'

-367,000,000

-180,000,000

-29,000,000

'

-179,000,000

'

'

'

'

'

'

'

(Provision) benefit for income taxes

4,000,000

8,000,000

115,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

26,000,000

Income (loss) from discontinued operations

-11,000,000

136,000,000

-417,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Income (loss) from discontinued operations

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Attributable to noncontrolling interests

0

0

10,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Attributable to The Williams Companies, Inc.

-11,000,000

136,000,000

-427,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Textuals [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Former Business Ownership Interest

'

'

100.00%

100.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Cash Payments Received Related To Former Venezuela Operations Settlement

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

98,000,000

'

'

'

Cash Installments Related To Former Operations Settlement

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

15,000,000

'

'

'

Assets, Fair Value Disclosure [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Notes Receivable, Fair Value Disclosure

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

88,000,000

'

'

'

Investments, Fair Value Disclosure

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$4,500,000,000

$6,700,000,000

$5,500,000,000

'

'

'

'

Fair Value Inputs [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Fair Value Inputs, Discount Rate

'

'

'

'

11.25%

13.25%

15.25%

15.25%

18.25%

'

'

'

'

'

'

'

'

12.00%

'

'

'

Fair Value Inputs, Probability of Default

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

15.00%

100.00%

'

Fair Value Inputs, Control Premium

'

'

'

'

'

'

'

'

'

'

'

'

'

30.00%

'

'

'

'

'

'

'

Discontinued_Operations_Detail1

Discontinued Operations (Details 1) (Segment, Discontinued Operations [Member], USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2011
Segment, Discontinued Operations [Member]	'
Pre Tax Gains And Losses For Energy Commodity Derivatives Designated As Cash Flow Hedges [Abstract]	'
Net gain (loss) recognized in other comprehensive income (loss) (effective portion)	$413
Net gain (loss) reclassified from accumulated other comprehensive income (loss) into income (effective portion)	332
Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net Abstract	'
Gain (loss) recognized in income	$30

Investing_Activities_Details

Investing Activities (Details) (USD $)

12 Months Ended

12 Months Ended

12 Months Ended

12 Months Ended

12 Months Ended

12 Months Ended

12 Months Ended

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 20, 2012

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2010

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Access Midstream Partners [Member]

Access Midstream Partners [Member]

Access Midstream Partners [Member]

Access Midstream Partners [Member]

Access Midstream Partners [Member]

Access Midstream Partners [Member]

Overland Pass Pipeline Company LLC [Member]

Overland Pass Pipeline Company LLC [Member]

Overland Pass Pipeline Company LLC [Member]

Gulfstream Natural Gas System LLC [Member]

Gulfstream Natural Gas System LLC [Member]

Gulfstream Natural Gas System LLC [Member]

Discovery Producer Services LLC [Member]

Discovery Producer Services LLC [Member]

Discovery Producer Services LLC [Member]

Discovery Producer Services LLC [Member]

Laurel Mountain Midstream, LLC [Member]

Laurel Mountain Midstream, LLC [Member]

Laurel Mountain Midstream, LLC [Member]

Laurel Mountain Midstream, LLC [Member]

Caiman Energy Ii Llc [Member]

Caiman Energy Ii Llc [Member]

Caiman Energy Ii Llc [Member]

Aux Sable Liquid Products LP [Member]

Aux Sable Liquid Products LP [Member]

Aux Sable Liquid Products LP [Member]

Other [Member]

Other [Member]

Accroven SRL sold [Member]

Accroven SRL sold [Member]

Accroven SRL sold [Member]

Former Venezuela Operations [Member]

Former Venezuela Operations [Member]

Access Midstream Partners G P L L C [Member]

Limited Partner [Member]

Adjustment For Amortization Of Difference Between Carrying Amount And Underlying Equity [Member]

Proportionate Share Of Amounts Remaining For Capital Projects [Member]

Proportionate Share Of Amounts Remaining For Capital Projects [Member]

Proportionate Share Of Amounts Remaining For Capital Projects [Member]

Investing income

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Equity earnings (losses)

$134,000,000

[1]

$111,000,000

[1]

$155,000,000

[1]

$93,000,000

'

'

'

'

($63,000,000)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Income (loss) from investments

28,000,000

[1]

49,000,000

[1]

7,000,000

[1]

31,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

53,000,000

11,000,000

'

'

'

'

Interest income and other

53,000,000

28,000,000

6,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

10,000,000

'

'

50,000,000

7,000,000

'

Total investing income

215,000,000

188,000,000

168,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Investments

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Equity Method Investments

4,360,000,000

3,987,000,000

'

2,161,000,000

'

2,187,000,000

'

'

'

452,000,000

454,000,000

'

333,000,000

348,000,000

'

527,000,000

[2]

350,000,000

[2]

'

'

481,000,000

[2]

444,000,000

[2]

'

'

256,000,000

67,000,000

'

'

'

'

150,000,000

137,000,000

'

'

'

'

'

'

Equity Method Investment, Ownership Percentage

'

'

'

24.00%

'

'

'

23.00%

'

50.00%

'

'

50.00%

'

'

60.00%

'

'

'

51.00%

'

'

'

47.50%

'

'

'

'

'

'

'

'

'

50.00%

'

'

50.00%

Dividends and distributions

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Equity Method Investment, Difference Between Carrying Amount and Underlying Equity

1,130,000,000

'

'

'

1,270,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Expected contributions to equity method investees for expansion projects

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

244,000,000

'

'

'

72,000,000

'

'

119,000,000

'

'

'

'

'

'

'

'

'

'

'

Equity Method Investment, payments to purchase or contributions

455,000,000

2,651,000,000

211,000,000

'

2,190,000,000

'

'

'

'

'

'

'

'

'

'

193,000,000

169,000,000

'

'

42,000,000

174,000,000

137,000,000

'

192,000,000

69,000,000

'

'

'

'

'

'

'

'

'

'

'

'

Equity method investment, dividends or distributions

247,000,000

173,000,000

193,000,000

93,000,000

'

0

0

'

'

27,000,000

28,000,000

19,000,000

81,000,000

79,000,000

84,000,000

12,000,000

21,000,000

40,000,000

'

'

'

'

'

'

'

'

20,000,000

28,000,000

35,000,000

'

'

'

'

'

'

'

'

Summarized Financial Position of Equity Method Investments

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Current assets

689,000,000

582,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Noncurrent assets

13,621,000,000

11,571,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Current liabilities

-573,000,000

-507,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Noncurrent liabilities

-4,563,000,000

-3,807,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Noncontrolling interests

-254,000,000

-112,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Summarized Results of Operations of Equity Method Investments

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Gross revenue

2,406,000,000

1,821,000,000

1,808,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Operating income

699,000,000

557,000,000

747,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Net income

627,000,000

488,000,000

654,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Related Party Transactions [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Related Party Transaction, Purchases from Related Party

161,000,000

186,000,000

234,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Related party transactions, payable

13,000,000

15,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Related Party Transaction, Expenses from Transactions with Related Party

$67,000,000

$75,000,000

$57,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

[1]

Items also included in Segment profit (loss). (See Note 18 b Segment Disclosures.)

[2]

We account for these investments under the equity method due to the significant participatory rights of our partners such that we do not control or are otherwise not the primary beneficiary of the investments.

Other_Income_and_Expense_Detai

Other Income and Expense (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Segment Reporting Information [Line Items]	'	'	'
Write-off of certain assets	$0	$0	$882
Williams Partners [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Amortization of regulatory assets associated with asset retirement obligations	30	7	6
Project feasibility costs	4	21	10
Capitalization of project feasibility costs previously expensed	-1	-19	-11
Williams Partners [Member] | Producer claim [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Settlement in principle of a producer claim	25	0	0
Williams Partners [Member] | Asset Impairment for Regulatory Action [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Write-off of certain assets	12	0	0
Insurance recoveries	-16	0	0
Williams Partners [Member] | Geismar Incident [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Net insurance recoveries associated with the Geismar Incident	-40	0	0
Insurance recoveries	-50	'	'
Williams NGL & Petchem Services [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Write-off of certain assets	20	0	0
Williams NGL & Petchem Services [Member] | Gulf Liquids [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Gulf Liquids litigation contingency accrual reduction	$0	$0	($19)

Other_Income_and_Expense_Detai1

Other Income and Expense (Details Textuals) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Segment Reporting Information [Line Items]	'	'	'
Restructuring charges for corporate realignment	'	$26	'
Early debt retirement costs	0	0	271
Williams Partners [Member] | Asset Impairment for Regulatory Action [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Insurance Recoveries	16	0	0
Charges related to leak at storage facility	3	2	15
Williams Partners [Member] | Geismar Incident [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Insurance deductible expense	13	'	'
Insurance Recoveries	50	'	'
Insurable Expense in Excess of our Deductibles	10	'	'
Williams Partners [Member] | Property Damage And Business Interruption [Member] | Geismar Incident [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Maximum insurance recoverable amount	500	'	'
Williams Partners [Member] | Property Damage [Member] | Geismar Incident [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Insurance deductibles	10	'	'
Williams Partners [Member] | Business Interruption [Member] | Geismar Incident [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Duration of waiting period before business interrutpion coverage begins	'60 days	'	'
Williams Partners [Member] | General Liability [Member] | Geismar Incident [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Maximum insurance recoverable amount	610	'	'
Insurance deductibles	2	'	'
Williams Partners [Member] | Workers Compensation [Member] | Geismar Incident [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Insurance deductibles	1	'	'
Williams NGL & Petchem Services [Member] | Gulf Liquids [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Gulf Liquids interest expense reduction associated wtih litigation contingency acrual reversal	'	'	$14

Provision_for_Income_Taxes_Tax

Provision for Income Taxes Tax Provison (Benefit) Table (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Current :	'	'	'
Federal	($17)	$91	$181
State	7	17	13
Foreign	-13	40	-6
Total	-23	148	188
Deferred:	'	'	'
Federal	348	220	-61
State	40	-13	-14
Foreign	36	5	11
Total	424	212	-64
Provision (benefit) for income taxes	$401	$360	$124

Provision_for_Income_Taxes_Rec

Provision for Income Taxes Reconciliations to Recorded Tax Provision (Benefit) Table (Details) (USD $)	3 Months Ended		12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Sep. 30, 2011	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Effective Income Tax Rate Reconciliation, Amount [Abstract]	'	'	'	'	'
Provision (benefit) at statutory rate	'	'	$378	$451	$421
Increases (decreases) in taxes resulting from:	'	'	'	'	'
Impact of nontaxable noncontrolling interests	'	'	-78	-72	-96
State income taxes (net of federal benefit)	'	'	26	2	11
Foreign operations - net	'	'	-32	-36	-14
Federal settlements	'	'	0	0	-109
International revised assessments	'	'	0	0	-38
Taxes on undistributed earnings of foreign subsidiaries - net	99	-66	99	0	-66
Other - net	'	'	8	15	15
Provision (benefit) for income taxes	'	'	$401	$360	$124

Provision_for_Income_Taxes_Def

Provision for Income Taxes Deferred Tax Table (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Deferred tax liabilities:	'	'
Property, plant, and equipment	$102	$72
Undistributed earnings of foreign subsidiaries	75	0
Investments	3,663	3,146
Other	0	34
Total deferred tax liabilities	3,840	3,252
Deferred tax assets:	'	'
Accrued liabilities	126	313
Federal tax credits	108	74
State losses and credits	194	195
Other	91	90
Total deferred tax assets	519	672
Less valuation allowance	181	144
Net deferred tax assets	338	528
Overall net deferred tax liabilities	$3,502	$2,724

Provision_for_Income_Taxes_Rec1

Provision for Income Taxes Reconciliation of Unrecognized Tax Benefits Table (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]	'	'
Balance at beginning of period	$58	$38
Additions based on tax positions related to the current year	4	4
Additions for tax positions of prior years	18	22
Reductions for tax positions of prior years	-2	-6
Settlement with taxing authorities	-12	0
Balance at end of period	$66	$58

Provision_Benefit_for_Income_T2

Provision (Benefit) for Income Taxes (Details) (USD $)	3 Months Ended		12 Months Ended						1 Months Ended		3 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Sep. 30, 2011	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Mar. 31, 2013	Feb. 28, 2013	Sep. 30, 2012	Aug. 31, 2011	Jul. 31, 2011	Mar. 31, 2012
									Internal Revenue Service (IRS) [Member]	Internal Revenue Service (IRS) [Member]	Foreign Tax Authority [Member]
Income Tax Contingency [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Deferred tax provison related to change in tax law	'	'	$10	'	'	'	'	'	'	'	'
Foreign income (loss) in Income from continuing operations before income taxes	'	'	119	196	173	'	'	'	'	'	'
Taxes on undistributed earnings of foreign subsidiaries - net	99	-66	99	0	-66	'	'	'	'	'	'
Tax provision (benefit) in AOCI	'	'	-24	'	'	'	'	'	'	'	'
Estimated current tax liability in 1Q 2014	111	'	111	'	'	'	'	'	'	'	'
Cash payments for income taxes (net of refunds and including discontinued operations)	'	'	-50	198	296	'	'	'	'	'	'
Unrecognized tax benefits	66	'	66	58	38	'	'	'	'	'	'
Reduction of income tax expense, net of federal tax expense, if recognized	'	'	70	'	'	'	'	'	'	'	'
Total interest and penalties recognized as part of income tax expense (benefit)	'	'	9	-7	-56	'	'	'	'	'	'
Total interest and penalties accrued as uncertain tax positions	16	'	16	7	'	'	'	'	'	'	'
Tax benefit from finalized settlements	'	'	0	0	109	'	'	'	'	'	'
Tax benefit from international revised assessments	'	'	0	0	38	'	'	'	'	'	'
Cash payments (refunds) related to the settlements/revised assessments	'	'	'	'	'	'	'	'	77	82	-21
Tax provision (benefit) from income tax examination	'	'	'	'	'	'	'	2	'	'	'
Cash payment (refund) from income tax examination	'	'	'	'	'	'	12	'	'	'	'
Tax settlements with WPX	'	'	'	'	'	$2	'	'	'	'	'

Earnings_Loss_Per_Common_Share2

Earnings (Loss) Per Common Share from Continuing Operations (Details) (USD $)	12 Months Ended
In Millions, except Share data in Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Earnings (loss) per common share from continuing operations	'	'	'
Income (loss) from continuing operations attributable to The Williams Companies, Inc. available to common stockholders for basic and diluted earnings (loss) per common share	$441	$723	$803
Basic weighted-average shares	682,948	619,792	588,553
Diluted weighted-average shares	687,185	625,486	598,175
Earnings (loss) per common share from continuing operations:	'	'	'
Basic	$0.65	$1.17	$1.36
Diluted	$0.64	$1.15	$1.34
Nonvested restricted stock units [Member]	'	'	'
Effect of dilutive securities:	'	'	'
Incremental common shares attributable to share-based payment arrangements under effects of dilutive securities item	1,995	2,694	4,332
Earnings (loss) per common share from continuing operations:	'	'	'
Distributed Earnings	$2	$1	'
Stock options [Member]	'	'	'
Effect of dilutive securities:	'	'	'
Incremental common shares attributable to share-based payment arrangements under effects of dilutive securities item	2,149	2,608	3,374
Convertible debentures [Member]	'	'	'
Effect of dilutive securities:	'	'	'
Incremental dilutive shares, Convertible debt	93	392	1,916

EBPs_Obligation_Rollforward_De

EBPs Obligation Rollforward (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Pension Plan, Defined Benefit [Member]	'	'	'
Change in benefit obligation:	'	'	'
Benefit obligation at beginning of year	$1,549	$1,441	'
Service cost	44	39	41
Interest cost	51	55	64
Plan participants' contributions	0	0	'
Benefits paid	-87	-75	'
Medicare Part D subsidy	0	0	'
Plan amendment	0	0	'
Actuarial loss (gain)	-173	98	'
Settlements	0	-9	'
Benefit obligation at end of year	1,384	1,549	1,441
Other Postretirement Benefits [Member]	'	'	'
Change in benefit obligation:	'	'	'
Benefit obligation at beginning of year	331	339	'
Service cost	2	3	2
Interest cost	11	13	15
Plan participants' contributions	6	5	'
Benefits paid	-19	-20	'
Medicare Part D subsidy	4	3	'
Plan amendment	-59	-6	'
Actuarial loss (gain)	-63	-6	'
Settlements	0	0	'
Benefit obligation at end of year	$213	$331	$339

EBP_Asset_rollforward_and_BS_c

EBP Asset rollforward and B.S. classification (Details 1) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Pension Benefits [Member]	'	'
Change in plan assets:	'	'
Fair value of plan assets at beginning of year	$1,071	$965
Actual return on plan assets	165	111
Employer contributions	92	79
Plan participants' contributions	0	0
Benefits paid	-87	-75
Settlements	0	-9
Fair value of plan asets at end of year	1,241	1,071
Funded status - underfunded	-143	-478
Accumulated benefit obligation	1,359	1,519
Underfunded status of our pension plans and other postretirement benefit plans	'	'
Current liabilities	1	3
Noncurrent liabilities	142	475
Amounts included in accumulated other comprehensive loss:	'	'
Prior service (cost) credit	0	-1
Net actuarial loss	-491	-828
Other Postretirement Benefits [Member]	'	'
Change in plan assets:	'	'
Fair value of plan assets at beginning of year	175	159
Actual return on plan assets	31	18
Employer contributions	8	13
Plan participants' contributions	6	5
Benefits paid	-19	-20
Settlements	0	0
Fair value of plan asets at end of year	201	175
Funded status - underfunded	-12	-156
Underfunded status of our pension plans and other postretirement benefit plans	'	'
Current liabilities	8	8
Noncurrent liabilities	4	148
Amounts included in accumulated other comprehensive loss:	'	'
Prior service (cost) credit	26	7
Net actuarial loss	-11	-35
Amounts included in regulatory assets or liabilities associated with Transco and Northwest Pipeline	'	'
Prior service credit	42	14
Net actuarial loss	-2	-67
Net regulatory assets (liabilities)	($44)	($38)

EBP_Net_Periodic_Benefit_Cost_

EBP Net Periodic Benefit Cost & OCI (Details 2) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Pension Benefits [Member]	'	'	'
Components of net periodic benefit cost:	'	'	'
Service cost	$44	$39	$41
Interest cost	51	55	64
Expected return on plan assets	-61	-64	-77
Amortization of prior service cost (credit)	1	1	1
Amortization of net actuarial loss	60	53	38
Net actuarial loss from settlements	0	5	4
Reclassification to regulatory liability	0	0	0
Net periodic benefit cost	95	89	71
Amounts related to WPX's net periodic benefit cost recorded in income (loss) from discontinued operations	'	'	8
Other changes in plan assets and benefit obligations recognized in other comprehensive income (loss):	'	'	'
Net actuarial gain (loss)	277	-51	-220
Prior service credit	0	0	0
Amortization of prior service cost (credit)	1	1	1
Amortization of net actuarial loss and loss from settlements	60	58	42
Other changes in plan assets and benefit obligations recognized in other comprehensive income (loss)	338	8	-177
Amounts included in accumulated other comprehensive loss:	'	'	'
Prior service cost (credit) expected to be amortized in next fiscal year	0	'	'
Net actuarial (gain) loss expected to be amortized in next fiscal year	38	'	'
Other Postretirement Benefits [Member]	'	'	'
Components of net periodic benefit cost:	'	'	'
Service cost	2	3	2
Interest cost	11	13	15
Expected return on plan assets	-9	-9	-10
Amortization of prior service cost (credit)	-12	-7	-11
Amortization of net actuarial loss	4	8	3
Net actuarial loss from settlements	0	0	0
Reclassification to regulatory liability	2	0	1
Net periodic benefit cost	-2	8	0
Amounts related to WPX's net periodic benefit cost recorded in income (loss) from discontinued operations	'	'	1
Other changes in plan assets and benefit obligations recognized in other comprehensive income (loss):	'	'	'
Net actuarial gain (loss)	23	2	-21
Prior service credit	23	2	2
Amortization of prior service cost (credit)	-4	-3	-4
Amortization of net actuarial loss and loss from settlements	1	3	1
Other changes in plan assets and benefit obligations recognized in other comprehensive income (loss)	43	4	-22
Other changes in plan assets and benefit obligations recognized in regulatory (assets) liabilities:	'	'	'
Net actuarial gain (loss) recognized in regulatory liabilities (assets)	62	13	-39
Prior service credit (cost) recognized in regulatory liabilities (assets)	36	4	1
Amortization of net actuarial loss (gain) from regulatory assets (liabilities)	3	5	2
Amortization of prior service cost (credit) from regulatory assets (liabilities)	-8	-4	-7
Amounts included in accumulated other comprehensive loss:	'	'	'
Prior service cost (credit) expected to be amortized in next fiscal year	-8	'	'
Net actuarial (gain) loss expected to be amortized in next fiscal year	0	'	'
Amounts included in regulatory assets or liabilities associated with Transco and Northwest Pipeline	'	'	'
Prior service cost (credit) expected to be amortized in next fiscal year	-12	'	'
Net actuarial (gain) loss expected to be amortized in next fiscal year	$0	'	'

EBP_Key_Assumptions_Details_3

EBP Key Assumptions (Details 3) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Weighted average assumptions utilized to determine net periodic benefit cost	'	'	'
Health care cost trend rate assumed for next fiscal year	7.20%	'	'
Direction and pattern of change for assumed health care cost trend rate	'decreases	'	'
Ultimate health care cost trend rate	5.00%	'	'
Year that rate reaches ultimate trend rate	'2023	'	'
One percentage point change in assumed health care cost trend rates effects	'	'	'
Effect on total of service and interest cost components, Point increase	1	'	'
Effect on total of service and interest cost components, Point decrease	-1	'	'
Effect on other postretirement benefit obligation, Point increase	7	'	'
Effect on other postretirement benefit obligation, Point decrease	-6	'	'
Pension Benefits [Member]	'	'	'
Weighted average assumptions utilized to determine benefit obligations	'	'	'
Discount rate	4.68%	3.43%	'
Rate of compensation increase	4.56%	4.57%	'
Weighted average assumptions utilized to determine net periodic benefit cost	'	'	'
Discount rate	3.43%	3.98%	5.19%
Expected long-term rate of return on plan assets	5.90%	6.30%	7.50%
Rate of compensation increase	4.57%	4.52%	5.00%
Other Postretirement Benefits [Member]	'	'	'
Weighted average assumptions utilized to determine benefit obligations	'	'	'
Discount rate	4.80%	3.77%	'
Weighted average assumptions utilized to determine net periodic benefit cost	'	'	'
Discount rate	3.97%	4.22%	5.35%
Expected long-term rate of return on plan assets	5.26%	5.71%	6.54%

EBP_Plan_Assets_Details_4

EBP Plan Assets (Details 4) (USD $)

12 Months Ended

12 Months Ended

12 Months Ended

12 Months Ended

12 Months Ended

In Millions, unless otherwise specified

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

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Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

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Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

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Dec. 31, 2012

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Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

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Dec. 31, 2013

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Dec. 31, 2012

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Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

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Dec. 31, 2013

Dec. 31, 2012

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Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Equities - International small cap [Member]

Equities - Emerging markets value [Member]

Equities - Emerging markets growth [Member]

Equities - International developed markets large cap value [Member]

Fixed income - Corporate bonds [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Pension Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Other Postretirement Benefits [Member]

Commingled investment funds - equities [Member]

Commingled investment funds - equities [Member]

Commingled investment funds - equities [Member]

Commingled investment funds - equities [Member]

Commingled investment funds - fixed income [Member]

Equity securities [Member]

Fixed income securities [Member]

Fixed income securities [Member]

U.S. equity securities [Member]

International equity securities [Member]

Cash management fund [Member]

Cash management fund [Member]

U.S. large cap [Member]

U.S. large cap [Member]

U.S. small cap [Member]

U.S. small cap [Member]

International developed markets large cap growth [Member]

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Preferred stock [Member]

Preferred stock [Member]

Equities - U.S. large cap [Member]

Equities - U.S. large cap [Member]

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Equities - Emerging markets value [Member]

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Level 1 [Member]

Level 1 [Member]

Level 1 [Member]

Level 1 [Member]

Level 1 [Member]

Level 1 [Member]

Level 1 [Member]

Level 1 [Member]

Level 1 [Member]

Level 1 [Member]

Level 1 [Member]

Level 1 [Member]

Level 1 [Member]

Level 1 [Member]

Level 1 [Member]

Level 1 [Member]

Level 1 [Member]

Level 1 [Member]

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Level 1 [Member]

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Level 1 [Member]

Level 1 [Member]

Level 1 [Member]

Level 1 [Member]

Level 1 [Member]

Level 1 [Member]

Level 1 [Member]

Level 1 [Member]

Level 1 [Member]

Level 2 [Member]

Level 2 [Member]

Level 2 [Member]

Level 2 [Member]

Level 2 [Member]

Level 2 [Member]

Level 2 [Member]

Level 2 [Member]

Level 2 [Member]

Level 2 [Member]

Level 2 [Member]

Level 2 [Member]

Level 2 [Member]

Level 2 [Member]

Level 2 [Member]

Level 2 [Member]

Level 2 [Member]

Level 2 [Member]

Level 2 [Member]

Level 2 [Member]

Level 2 [Member]

Level 2 [Member]

Level 2 [Member]

Level 2 [Member]

Level 2 [Member]

Level 2 [Member]

Level 2 [Member]

Level 2 [Member]

Level 2 [Member]

Level 2 [Member]

Level 2 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

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Level 1 [Member]

Level 1 [Member]

Level 1 [Member]

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Level 2 [Member]

Level 2 [Member]

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Level 2 [Member]

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Equity securities [Member]

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Equity securities [Member]

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U.S. Treasury securities [Member]

Mortgage-backed securities [Member]

Mortgage-backed securities [Member]

Corporate bonds [Member]

Corporate bonds [Member]

Insurance company investment contracts and other [Member]

Insurance company investment contracts and other [Member]

Equity securities [Member]

Equity securities [Member]

Equity securities [Member]

Equity securities [Member]

Equity securities [Member]

Equity securities [Member]

Equity securities [Member]

Equity securities [Member]

Equity securities [Member]

Commingled investment funds - equities [Member]

Commingled investment funds - equities [Member]

Commingled investment funds - equities [Member]

Commingled investment funds - equities [Member]

Commingled investment funds - equities [Member]

Commingled investment funds - equities [Member]

Commingled investment funds - equities [Member]

Commingled investment funds - equities [Member]

Commingled investment funds - fixed income [Member]

Commingled investment funds - fixed income [Member]

Fixed income securities [Member]

Fixed income securities [Member]

Fixed income securities [Member]

Fixed income securities [Member]

Fixed income securities [Member]

Fixed income securities [Member]

Fixed income securities [Member]

Fixed income securities [Member]

Cash management fund [Member]

Cash management fund [Member]

U.S. large cap [Member]

U.S. large cap [Member]

U.S. small cap [Member]

U.S. small cap [Member]

International developed markets large cap growth [Member]

International developed markets large cap growth [Member]

Emerging markets growth [Member]

Emerging markets growth [Member]

Preferred stock [Member]

Equities - U.S. large cap [Member]

Equities - U.S. large cap [Member]

Equities - International small cap [Member]

Equities - Emerging markets value [Member]

Equities - Emerging markets value [Member]

Equities - Emerging markets growth [Member]

Equities - International developed markets large cap value [Member]

Equities - International developed markets large cap value [Member]

Fixed income - Corporate bonds [Member]

Fixed income - Corporate bonds [Member]

U.S. Treasury securities [Member]

U.S. Treasury securities [Member]

Government and municipal bonds [Member]

Government and municipal bonds [Member]

Mortgage-backed securities [Member]

Mortgage-backed securities [Member]

Corporate bonds [Member]

Corporate bonds [Member]

Cash management fund [Member]

Cash management fund [Member]

U.S. large cap [Member]

U.S. large cap [Member]

U.S. small cap [Member]

U.S. small cap [Member]

International developed markets large cap growth [Member]

International developed markets large cap growth [Member]

Emerging markets growth [Member]

Emerging markets growth [Member]

Preferred stock [Member]

Equities - U.S. large cap [Member]

Equities - U.S. large cap [Member]

Equities - International small cap [Member]

Equities - Emerging markets value [Member]

Equities - Emerging markets value [Member]

Equities - Emerging markets growth [Member]

Equities - International developed markets large cap value [Member]

Equities - International developed markets large cap value [Member]

Fixed income - Corporate bonds [Member]

Fixed income - Corporate bonds [Member]

U.S. Treasury securities [Member]

U.S. Treasury securities [Member]

Government and municipal bonds [Member]

Government and municipal bonds [Member]

Mortgage-backed securities [Member]

Mortgage-backed securities [Member]

Corporate bonds [Member]

Corporate bonds [Member]

Cash management fund [Member]

Cash management fund [Member]

U.S. large cap [Member]

U.S. large cap [Member]

U.S. small cap [Member]

U.S. small cap [Member]

International developed markets large cap growth [Member]

International developed markets large cap growth [Member]

Emerging markets growth [Member]

Emerging markets growth [Member]

Preferred stock [Member]

Equities - U.S. large cap [Member]

Equities - U.S. large cap [Member]

Equities - International small cap [Member]

Equities - Emerging markets value [Member]

Equities - Emerging markets value [Member]

Equities - Emerging markets growth [Member]

Equities - International developed markets large cap value [Member]

Equities - International developed markets large cap value [Member]

Fixed income - Corporate bonds [Member]

Fixed income - Corporate bonds [Member]

U.S. Treasury securities [Member]

U.S. Treasury securities [Member]

Government and municipal bonds [Member]

Government and municipal bonds [Member]

Mortgage-backed securities [Member]

Mortgage-backed securities [Member]

Corporate bonds [Member]

Corporate bonds [Member]

Equity securities [Member]

Equity securities [Member]

Equity securities [Member]

Equity securities [Member]

Equity securities [Member]

Equity securities [Member]

Equity securities [Member]

Equity securities [Member]

Equity securities [Member]

Commingled investment funds - equities [Member]

Commingled investment funds - equities [Member]

Commingled investment funds - equities [Member]

Commingled investment funds - equities [Member]

Commingled investment funds - equities [Member]

Commingled investment funds - equities [Member]

Commingled investment funds - equities [Member]

Commingled investment funds - equities [Member]

Commingled investment funds - fixed income [Member]

Commingled investment funds - fixed income [Member]

Fixed income securities [Member]

Fixed income securities [Member]

Fixed income securities [Member]

Fixed income securities [Member]

Fixed income securities [Member]

Fixed income securities [Member]

Equity securities [Member]

Equity securities [Member]

Equity securities [Member]

Equity securities [Member]

Equity securities [Member]

Equity securities [Member]

Equity securities [Member]

Equity securities [Member]

Equity securities [Member]

Commingled investment funds - equities [Member]

Commingled investment funds - equities [Member]

Commingled investment funds - equities [Member]

Commingled investment funds - equities [Member]

Commingled investment funds - equities [Member]

Commingled investment funds - equities [Member]

Commingled investment funds - equities [Member]

Commingled investment funds - equities [Member]

Commingled investment funds - fixed income [Member]

Commingled investment funds - fixed income [Member]

Fixed income securities [Member]

Fixed income securities [Member]

Fixed income securities [Member]

Fixed income securities [Member]

Fixed income securities [Member]

Fixed income securities [Member]

Equity securities [Member]

Equity securities [Member]

Equity securities [Member]

Equity securities [Member]

Equity securities [Member]

Equity securities [Member]

Equity securities [Member]

Equity securities [Member]

Equity securities [Member]

Commingled investment funds - equities [Member]

Commingled investment funds - equities [Member]

Commingled investment funds - equities [Member]

Commingled investment funds - equities [Member]

Commingled investment funds - equities [Member]

Commingled investment funds - equities [Member]

Commingled investment funds - equities [Member]

Commingled investment funds - equities [Member]

Commingled investment funds - fixed income [Member]

Commingled investment funds - fixed income [Member]

Fixed income securities [Member]

Fixed income securities [Member]

Fixed income securities [Member]

Fixed income securities [Member]

Fixed income securities [Member]

Fixed income securities [Member]

Equity securities [Member]

Equity securities [Member]

Equity securities [Member]

Equity securities [Member]

Equity securities [Member]

Equity securities [Member]

Equity securities [Member]

Equity securities [Member]

Equity securities [Member]

Commingled investment funds - equities [Member]

Commingled investment funds - equities [Member]

Commingled investment funds - equities [Member]

Commingled investment funds - equities [Member]

Commingled investment funds - equities [Member]

Commingled investment funds - equities [Member]

Commingled investment funds - equities [Member]

Commingled investment funds - equities [Member]

Commingled investment funds - fixed income [Member]

Commingled investment funds - fixed income [Member]

Fixed income securities [Member]

Fixed income securities [Member]

Fixed income securities [Member]

Fixed income securities [Member]

Fixed income securities [Member]

Fixed income securities [Member]

Fixed income securities [Member]

Fixed income securities [Member]

Equity securities [Member]

Equity securities [Member]

Equity securities [Member]

Equity securities [Member]

Equity securities [Member]

Equity securities [Member]

Equity securities [Member]

Equity securities [Member]

Equity securities [Member]

Commingled investment funds - equities [Member]

Commingled investment funds - equities [Member]

Commingled investment funds - equities [Member]

Commingled investment funds - equities [Member]

Commingled investment funds - equities [Member]

Commingled investment funds - equities [Member]

Commingled investment funds - equities [Member]

Commingled investment funds - equities [Member]

Commingled investment funds - fixed income [Member]

Commingled investment funds - fixed income [Member]

Fixed income securities [Member]

Fixed income securities [Member]

Fixed income securities [Member]

Fixed income securities [Member]

Fixed income securities [Member]

Fixed income securities [Member]

Fixed income securities [Member]

Fixed income securities [Member]

Equity securities [Member]

Equity securities [Member]

Equity securities [Member]

Equity securities [Member]

Equity securities [Member]

Equity securities [Member]

Equity securities [Member]

Equity securities [Member]

Equity securities [Member]

Commingled investment funds - equities [Member]

Commingled investment funds - equities [Member]

Commingled investment funds - equities [Member]

Commingled investment funds - equities [Member]

Commingled investment funds - equities [Member]

Commingled investment funds - equities [Member]

Commingled investment funds - equities [Member]

Commingled investment funds - equities [Member]

Commingled investment funds - fixed income [Member]

Commingled investment funds - fixed income [Member]

Fixed income securities [Member]

Fixed income securities [Member]

Fixed income securities [Member]

Fixed income securities [Member]

Fixed income securities [Member]

Fixed income securities [Member]

Fixed income securities [Member]

Fixed income securities [Member]

Defined Benefit Plan Disclosure [Line Items]

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Proportion of assets subjected to income tax

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40.00%

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Plan assets target allocation range, minimum

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54.00%

36.00%

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37.00%

17.00%

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Plan assets target allocation range, maximum

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66.00%

44.00%

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45.00%

21.00%

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Maximum percentage of total stock portfolio invested in the common stock of any one corporation

5.00%

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Maximum percentage of portfolio invested in fixed income securities of any one issuer with exception of bond index funds and U. S. government guaranteed and agency securities

5.00%

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Number of active investment managers managing plan funds

'

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10

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4

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'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of passive investment managers managing plan funds

'

'

'

'

'

'

1

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Each investment manager responsibility to manage the plans' funds, minimum

1.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Each investment manager responsibility to manage the plans' funds, maximum

15.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

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'

'

'

'

'

'

'

'

'

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'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Maximum Percentage In Emerging Markets

'

15.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

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'

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'

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'

'

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'

'

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'

'

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'

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'

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'

'

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'

'

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'

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'

'

'

'

'

'

'

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'

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'

'

'

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'

'

'

'

'

'

'

'

'

'

'

'

'

'

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'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Maximum Time Span To Require Redemption Fee

'

'180 days

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Redemption Fee

'

1.50%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

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'

'

'

'

'

'

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'

'

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'

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'

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'

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'

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'

'

'

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'

'

'

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'

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'

'

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'

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'

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'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Length of notice period for redemption of commingled investment funds

'

'10 days

'10 days

'15 days

'10 days

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

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'

'

'

'

'

'

'

'

'

'

'

'

'

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'

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'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

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'

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'

'

'

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'

'

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'

'

'

'

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'

'

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'

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'

'

'

'

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'

'

'

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'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Maximum allocation to BBB rated securities

'

'

'

'

'

10.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

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'

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'

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'

'

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'

'

'

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'

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'

'

'

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'

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'

'

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'

'

'

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'

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'

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'

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'

'

'

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'

'

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'

'

'

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'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Target approximate duration in years

'

'

'

'

'

'20 years

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

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'

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'

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'

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'

'

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'

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'

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'

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'

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'

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'

'

'

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'

'

'

'

'

'

'

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'

'

'

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'

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'

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'

'

'

'

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'

'

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'

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'

'

'

'

'

'

'

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'

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'

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'

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'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Weighted average duration of fixed income security portfolio1

'

'

'

'

'

'

'

'

'

'

'6 years

'6 years

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

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'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'5 years

'5 years

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

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'

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'

'

'

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'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Fair values of plan assets

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Total assets at fair value

'

'

'

'

'

'

$1,241

$1,071

$965

'

'

'

'

'

$23

$21

$211

$169

$146

$115

$59

$62

$21

$2

$6

$179

$146

$24

$34

$33

$19

$100

$83

$140

$150

$30

$22

$67

$68

$200

$171

$7

$4

$412

$337

$23

$21

$211

$169

$146

$115

$0

$1

$3

$2

$6

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$30

$22

$0

$0

$0

$0

$0

$0

$829

$734

$0

$0

$0

$0

$0

$0

$59

$61

$18

$0

$0

$179

$146

$24

$34

$33

$19

$100

$83

$140

$150

$0

$0

$67

$68

$200

$171

$7

$4

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$201

$175

$159

'

'

$13

$14

$52

$42

$29

$21

$15

$13

$2

$5

$1

$18

$15

$2

$4

$3

$2

$10

$9

$14

$15

$3

$2

$10

$10

$7

$7

$20

$18

$98

$81

$13

$14

$52

$42

$29

$21

$0

$0

$1

$1

$1

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$3

$2

$0

$0

$0

$0

$0

$0

$103

$94

$0

$0

$0

$0

$0

$0

$15

$13

$1

$4

$0

$18

$15

$2

$4

$3

$2

$10

$9

$14

$15

$0

$0

$10

$10

$7

$7

$20

$18

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

EBP_Benefit_Pymts_Defined_Cont

EBP Benefit Pymts & Defined Contribution Plans (Details 6) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Expected benefit payments	'	'	'
Employer's contributions charged to expense under defined contribution plans	$27	$25	$28
Defined contribution plan matching contributions included in income (loss) from discontinued operations related to WPX employees	'	'	5
Other Postretirement Benefits [Member]	'	'	'
Expected benefit payments	'	'	'
2014	15	'	'
2015	15	'	'
2016	16	'	'
2017	16	'	'
2018	17	'	'
2019-2023	74	'	'
Expected total plans contribution, approximate	8	'	'
Pension Benefits [Member]	'	'	'
Expected benefit payments	'	'	'
2014	88	'	'
2015	96	'	'
2016	102	'	'
2017	103	'	'
2018	109	'	'
2019-2023	591	'	'
Expected tax-qualified pension plans contribution, approximate	60	'	'
Expected nonqualified pension plans contribution, approximate	3	'	'
Expected total plans contribution, approximate	$63	'	'

Inventories_Details

Inventories (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Inventory, Net [Abstract]	'	'
Natural gas liquids, olefins, and natural gas in underground storage	$111	$97
Other Inventory, Net of Reserves	83	78
Inventories, Total	$194	$175

Property_Plant_and_Equipment_D

Property, Plant, and Equipment (Details PPE) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012	Dec. 31, 2011
Property, Plant, and Equipment	'		'	'
Total property, plant, and equipment, at cost	$25,823		$22,546	'
Accumulated depreciation and amortization	-7,613		-7,079	'
Property, plant, and equipment - net	18,210		15,467	'
Depreciation and amortization	752		712	658
Nonregulated [Member] | Natural gas gathering and processing facilities [Member]	'		'	'
Property, Plant, and Equipment	'		'	'
Total property, plant, and equipment, at cost	9,185		7,727	'
Nonregulated [Member] | Natural gas gathering and processing facilities [Member] | Minimum [Member]	'		'	'
Property, Plant, and Equipment	'		'	'
Property, Plant and Equipment, Useful Life	'5 years	[1]	'	'
Nonregulated [Member] | Natural gas gathering and processing facilities [Member] | Maximum [Member]	'		'	'
Property, Plant, and Equipment	'		'	'
Property, Plant and Equipment, Useful Life	'40 years	[1]	'	'
Nonregulated [Member] | Construction in Progress [Member]	'		'	'
Property, Plant, and Equipment	'		'	'
Total property, plant, and equipment, at cost	3,123		1,997	'
Nonregulated [Member] | Other Capitalized Property Plant and Equipment [Member]	'		'	'
Property, Plant, and Equipment	'		'	'
Total property, plant, and equipment, at cost	1,316		1,103	'
Nonregulated [Member] | Other Capitalized Property Plant and Equipment [Member] | Minimum [Member]	'		'	'
Property, Plant, and Equipment	'		'	'
Property, Plant and Equipment, Useful Life	'3 years	[1]	'	'
Nonregulated [Member] | Other Capitalized Property Plant and Equipment [Member] | Maximum [Member]	'		'	'
Property, Plant, and Equipment	'		'	'
Property, Plant and Equipment, Useful Life	'45 years	[1]	'	'
Regulated [Member] | Natural gas transmission facilities [Member]	'		'	'
Property, Plant, and Equipment	'		'	'
Total property, plant, and equipment, at cost	10,633		9,963	'
Regulated [Member] | Natural gas transmission facilities [Member] | Minimum [Member]	'		'	'
Property, Plant, and Equipment	'		'	'
Property, Plant, and Equipment, Depreciation Rate	1.20%	[1]	'	'
Regulated [Member] | Natural gas transmission facilities [Member] | Maximum [Member]	'		'	'
Property, Plant, and Equipment	'		'	'
Property, Plant, and Equipment, Depreciation Rate	6.97%	[1]	'	'
Regulated [Member] | Construction in Progress [Member]	'		'	'
Property, Plant, and Equipment	'		'	'
Total property, plant, and equipment, at cost	273		337	'
Regulated [Member] | Other Capitalized Property Plant and Equipment [Member]	'		'	'
Property, Plant, and Equipment	'		'	'
Total property, plant, and equipment, at cost	1,293		1,419	'
Regulated [Member] | Other Capitalized Property Plant and Equipment [Member] | Minimum [Member]	'		'	'
Property, Plant, and Equipment	'		'	'
Property, Plant, and Equipment, Depreciation Rate	1.35%	[1]	'	'
Regulated [Member] | Other Capitalized Property Plant and Equipment [Member] | Maximum [Member]	'		'	'
Property, Plant, and Equipment	'		'	'
Property, Plant, and Equipment, Depreciation Rate	33.33%	[1]	'	'
Regulated [Member] | Excess Of Original Cost Of Regulated Facilities [Member]	'		'	'
Property, Plant, and Equipment	'		'	'
Property, plant, and equipment - net	$785		$825	'
Period of straight-line amortization	'40 years		'	'
[1]	Estimated useful life and depreciation rates are presented as of DecemberB 31, 2013. Depreciation rates for regulated assets are prescribed by the FERC.

Property_Plant_and_Equipment_D1

Property, Plant, and Equipment (Details ARO) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012
Asset Retirement Obligations	'		'
Asset Retirement Obligations, Noncurrent	$497		$511
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]	'		'
Beginning balance	579		573
Liabilities incurred	8		8
Liabilities settled	-31	[1]	-44	[1]
Accretion expense	53		43
Revisions	-48	[2]	-1	[2]
Ending balance	561		579
Charges related to leak at underground storage facility [Member]	'		'
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]	'		'
Liabilities settled	-25		-31
Revisions	9		13
Asset Retirement Obligation Costs [Member]	'		'
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]	'		'
Transco's annual funding commitment for ARO	$36		'
[1]	For 2013 and 2012, liabilities settled include $25 million and $31 million, respectively, related to the abandonment of certain of Transcobs natural gas storage caverns that are associated with a leak in 2010.
[2]	Several factors are considered in the annual review process, including inflation rates, current estimates for removal cost, discount rates, and the estimated remaining life of the assets. The 2013 revision primarily reflects increases in the estimated remaining useful life of the assets. The 2012 revision primarily reflects a decrease in removal cost estimates. The 2013 and 2012 revisions also include increases of $9 million and $13 million, respectively, related to changes in the timing and method of abandonment on certain of Transcobs natural gas storage caverns that were associated with a leak in 2010.

Accrued_Liabilities_Details

Accrued Liabilities (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Accrued Liabilities, Current [Abstract]	'	'
Interest on debt	$167	$148
Employee costs	127	137
Customer Refund Liability, Current	98	0
Asset retirement obligations	64	68
Other, including other loss contingencies	341	275
Total accrued liabilities	$797	$628

LongTerm_Debt_Details_1

Long-Term Debt (Details 1) (USD $)

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Jul. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Aug. 31, 2012

Dec. 31, 2013

Nov. 30, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Nov. 30, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2013

In Millions, unless otherwise specified

Transcontinental Gas Pipe Line Company, LLC [Member]

Transcontinental Gas Pipe Line Company, LLC [Member]

Transcontinental Gas Pipe Line Company, LLC [Member]

Transcontinental Gas Pipe Line Company, LLC [Member]

Transcontinental Gas Pipe Line Company, LLC [Member]

Transcontinental Gas Pipe Line Company, LLC [Member]

Transcontinental Gas Pipe Line Company, LLC [Member]

Transcontinental Gas Pipe Line Company, LLC [Member]

Transcontinental Gas Pipe Line Company, LLC [Member]

Transcontinental Gas Pipe Line Company, LLC [Member]

Transcontinental Gas Pipe Line Company, LLC [Member]

Transcontinental Gas Pipe Line Company, LLC [Member]

Transcontinental Gas Pipe Line Company, LLC [Member]

Northwest Pipeline LLC [Member]

Northwest Pipeline LLC [Member]

Northwest Pipeline LLC [Member]

Northwest Pipeline LLC [Member]

Northwest Pipeline LLC [Member]

Northwest Pipeline LLC [Member]

Northwest Pipeline LLC [Member]

Northwest Pipeline LLC [Member]

Williams Partners L. P. [Member]

Williams Partners L. P. [Member]

Williams Partners L. P. [Member]

Williams Partners L. P. [Member]

Williams Partners L. P. [Member]

Williams Partners L. P. [Member]

Williams Partners L. P. [Member]

Williams Partners L. P. [Member]

Williams Partners L. P. [Member]

Williams Partners L. P. [Member]

Williams Partners L. P. [Member]

Williams Partners L. P. [Member]

Williams Partners L. P. [Member]

Williams Partners L. P. [Member]

Williams Partners L. P. [Member]

Williams Partners L. P. [Member]

Williams Partners L. P. [Member]

Williams Partners L. P. [Member]

Williams Partners L. P. [Member]

Williams Partners L. P. [Member]

Williams Partners L. P. [Member]

Williams Partners L. P. [Member]

Williams Partners L. P. [Member]

The Williams Companies, Inc.

The Williams Companies, Inc.

The Williams Companies, Inc.

The Williams Companies, Inc.

The Williams Companies, Inc.

The Williams Companies, Inc.

The Williams Companies, Inc.

The Williams Companies, Inc.

The Williams Companies, Inc.

The Williams Companies, Inc.

The Williams Companies, Inc.

The Williams Companies, Inc.

The Williams Companies, Inc.

The Williams Companies, Inc.

6.4% Senior Unsecured Notes due 2016 [Member]

6.4% Senior Unsecured Notes due 2016 [Member]

6.05% Senior Unsecured Notes due 2018 [Member]

6.05% Senior Unsecured Notes due 2018 [Member]

7.08% Debentures due 2026 [Member]

7.08% Debentures due 2026 [Member]

7.25% Debentures due 2026 [Member]

7.25% Debentures due 2026 [Member]

5.4% Senior Unsecured Notes due 2041 [Member]

5.4% Senior Unsecured Notes due 2041 [Member]

4.45% Senior Unsecured Notes due 2042 [Member]

4.45% Senior Unsecured Notes due 2042 [Member]

4.45% Senior Unsecured Notes due 2042 [Member]

7% Senior Unsecured Notes due 2016 [Member]

7% Senior Unsecured Notes due 2016 [Member]

5.95% Senior Unsecured Notes due 2017 [Member]

5.95% Senior Unsecured Notes due 2017 [Member]

6.05% Senior Unsecured Notes due 2018 [Member]

6.05% Senior Unsecured Notes due 2018 [Member]

7.125% Debentures due 2025 [Member]

7.125% Debentures due 2025 [Member]

3.8% Senior Unsecured Notes due 2015 [Member]

3.8% Senior Unsecured Notes due 2015 [Member]

7.25% Senior Unsecured Notes due 2017 [Member]

7.25% Senior Unsecured Notes due 2017 [Member]

5.25% Senior Unsecured Notes due 2020 [Member]

5.25% Senior Unsecured Notes due 2020 [Member]

4.125% Senior Unsecured Notes due 2020 [Member]

4.125% Senior Unsecured Notes due 2020 [Member]

4% Senior Unsecured Notes due 2021 [Member]

4% Senior Unsecured Notes due 2021 [Member]

3.35% Senior Unsecured Notes due 2022 [Member]

3.35% Senior Unsecured Notes due 2022 [Member]

3.35% Senior Unsecured Notes due 2022 [Member]

4.5% Senior Unsecured Notes due 2023 [Member]

4.5% Senior Unsecured Notes due 2023 [Member]

4.5% Senior Unsecured Notes due 2023 [Member]

6.3% Senior Unsecured Notes due 2040 [Member]

6.3% Senior Unsecured Notes due 2040 [Member]

5.8% Senior Unsecured Notes due 2043 [Member]

5.8% Senior Unsecured Notes due 2043 [Member]

5.8% Senior Unsecured Notes due 2043 [Member]

7.875% Senior Unsecured Notes due 2021 [Member]

7.875% Senior Unsecured Notes due 2021 [Member]

3.7% Senior Unsecured Notes due 2023 [Member]

3.7% Senior Unsecured Notes due 2023 [Member]

7.5% Debentures due 2031 [Member]

7.5% Debentures due 2031 [Member]

7.75% Senior Unsecured Notes due 2031 [Member]

7.75% Senior Unsecured Notes due 2031 [Member]

8.75% Senior Unsecured Notes due 2032 [Member]

8.75% Senior Unsecured Notes due 2032 [Member]

Various - 5.5% to 10.25% Senior Unsecured Notes and Debentures due 2019 to 2033 [Member]

Various - 5.5% to 10.25% Senior Unsecured Notes and Debentures due 2019 to 2033 [Member]

Various - 5.5% to 10.25% Senior Unsecured Notes and Debentures due 2019 to 2033 Minimum Interest Rate [Member]

Various - 5.5% to 10.25% Senior Unsecured Notes and Debentures due 2019 to 2033 Maximum Interest Rate [Member]

Long-term Debt

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Long-term debt

'

'

$200

$200

$250

$250

$8

$8

$200

$200

$375

$375

$400

$400

'

$175

$175

$185

$185

$250

$250

$85

$85

'

'

$750

$750

$600

$600

$1,500

$1,500

$600

$600

$500

$500

$750

$750

'

$600

'

$0

$1,250

$1,250

$400

'

$0

$371

$371

$850

$850

$339

$339

$252

$252

$445

$445

$55

$57

'

'

Long-term debt interest rate

'

'

6.40%

'

6.05%

'

7.08%

'

7.25%

'

5.40%

'

4.45%

'

4.45%

7.00%

'

5.95%

'

6.05%

'

7.13%

'

'

'

3.80%

'

7.25%

'

5.25%

'

4.13%

'

4.00%

'

3.35%

'

3.35%

4.50%

4.50%

'

6.30%

'

5.80%

5.80%

'

7.88%

'

3.70%

3.70%

7.50%

'

7.75%

'

8.75%

'

'

'

5.50%

10.25%

Credit facility loans

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

375

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Other, including secured capital lease obligations

1

2

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Net unamortized debt discount

-37

-33

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Total long-term debt, including current portion

11,354

10,736

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Long-term debt due within one year

-1

-1

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Long-term debt

$11,353

$10,735

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

LongTerm_Debt_Maturities_Detai

Long-Term Debt Maturities (Details 2) (USD $)	Dec. 31, 2013
In Millions, unless otherwise specified
Aggregate minimum maturities of long-term debt	'
2014	$0
2015	750
2016	375
2017	785
2018	$500

LongTerm_Debt_Issuances_and_Re

Long-Term Debt Issuances and Retirements (Details 3) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Aug. 31, 2012	Dec. 31, 2013	Nov. 30, 2013	Dec. 31, 2013	Nov. 30, 2013	Jul. 31, 2012	Dec. 31, 2013	Jul. 31, 2012
In Millions, unless otherwise specified	The Williams Companies, Inc.	The Williams Companies, Inc.	Williams Partners L.P.	Williams Partners L.P.	Williams Partners L.P.	Williams Partners L.P.	Williams Partners L.P.	Williams Partners L.P.	Transcontinental Gas Pipe Line Company, LLC [Member]	Transcontinental Gas Pipe Line Company, LLC [Member]	Transcontinental Gas Pipe Line Company, LLC [Member]
	3.7% Senior Unsecured Notes due 2023 [Member]	3.7% Senior Unsecured Notes due 2023 [Member]	3.35% Senior Unsecured Notes due 2022 [Member]	3.35% Senior Unsecured Notes due 2022 [Member]	4.5% Senior Unsecured Notes due 2023 [Member]	4.5% Senior Unsecured Notes due 2023 [Member]	5.8% Senior Unsecured Notes due 2043 [Member]	5.8% Senior Unsecured Notes due 2043 [Member]	8.875% Senior Unsecured Notes due 2012 [Member]	4.45% Senior Unsecured Notes due 2042 [Member]	4.45% Senior Unsecured Notes due 2042 [Member]
Debt Instrument [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Repayments of long-term debt	'	'	'	'	'	'	'	'	$325	'	'
Long-term debt face amount	'	$850	'	$750	'	$600	'	$400	'	'	$400
Long-term debt interest rate	3.70%	3.70%	3.35%	3.35%	4.50%	4.50%	5.80%	5.80%	8.88%	4.45%	4.45%

Credit_Facilities_and_Commerci

Credit Facilities and Commercial Paper (Details 4) (USD $)

12 Months Ended

12 Months Ended

12 Months Ended

In Millions, unless otherwise specified

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Jul. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Jul. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Transcontinental Gas Pipe Line Company, LLC [Member]

Northwest Pipeline LLC [Member]

Williams Partners L. P. [Member]

Williams Partners L. P. [Member]

$2.4 Billion Unsecured Credit Facility terminated July 2013 [Member]

$2.5 Billion Unsecured Credit Facility [Member]

$2.5 Billion Unsecured Credit Facility [Member]

$2.5 Billion Unsecured Credit Facility [Member]

$2.5 Billion Unsecured Credit Facility Letter of Credit [Member]

$2 Billion Unsecured Commercial Paper Notes [Member]

$900 million Unsecured Credit Facility terminated July 2013 [Member]

$1.5 Billion Unsecured Credit Facility [Member]

$1.5 Billion Unsecured Credit Facility Letter of Credit [Member]

$1.5 Billion Unsecured Credit Facility Letter of Credit Under Bilateral Bank Agreements [Member]

Williams Partners L. P. [Member]

Transcontinental Gas Pipe Line Company, LLC [Member]

Northwest Pipeline LLC [Member]

Williams Partners L. P. [Member]

Williams Partners L. P. [Member]

Williams Partners L. P. [Member]

Credit Facility and Commercial Paper [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Credit facility, capacity

'

'

'

'

'

'

$2,400

$500

$500

$2,500

$1,300

$2,000

$900

$1,500

$700

'

Credit facility, loans outstanding

'

'

'

'

0

375

'

'

'

0

'

'

'

0

'

'

Credit facility, letters of credit outstanding

'

'

'

'

'

'

'

'

'

'

0

'

'

'

0

16

Commercial paper, outstanding

225

0

'

'

'

'

'

'

'

'

'

225

'

'

'

'

Commercial paper, weighted average interest rate

'

'

'

'

'

'

'

'

'

'

'

0.42%

'

'

'

'

Commercial paper, maximum maturity

'

'

'

'

'

'

'

'

'

'

'

'397 days

'

'

'

'

Additional amount by which credit facility can be increased

'

'

'

'

'

'

'

'

'

500

'

'

'

500

'

'

Maximum ratio of debt to EBITDA

450.00%

'

'

'

500.00%

'

'

'

'

'

'

'

'

'

'

'

Minimum aggregate purchase price of acquisitions impacting maximum ratio of debt to EBITDA

$50

'

'

'

$50

'

'

'

'

'

'

'

'

'

'

'

Maximum ratio of debt to EBITDA after acquisition

500.00%

'

'

'

550.00%

'

'

'

'

'

'

'

'

'

'

'

Maximum ratio of debt to capitalization

'

'

65.00%

65.00%

'

'

'

'

'

'

'

'

'

'

'

'

Commitment fee

0.23%

'

'

'

0.18%

'

'

'

'

'

'

'

'

'

'

'

Cash_Payments_For_Interest_Net

Cash Payments For Interest (Net of Amounts Capitalized) (Details 5) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Debt Disclosure [Abstract]	'	'	'
Cash payments for interest (net of amounts capitalized)	$472	$479	$573

Restricted_Net_Assets_of_Subsi

Restricted Net Assets of Subsidiaries (Details 6) (USD $)	Dec. 31, 2013
In Billions, unless otherwise specified
Debt Disclosure [Abstract]	'
Amount of restricted net assets for consolidated and unconsolidated subsidiaries	$6.50
Restricted net assets threshold	25.00%

LeasesLessee_Details_7

Leases-Lessee (Details 7) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Future minimum annual rentals under noncancelable operating leases	'	'	'
2014	$53	'	'
2015	47	'	'
2016	43	'	'
2017	36	'	'
2018	30	'	'
Therafter	123	'	'
Total	332	'	'
Operating Leased Assets [Line Items]	'	'	'
Total rent expense	58	56	49
Jicarilla Apache Nation [Member]	'	'	'
Operating Leased Assets [Line Items]	'	'	'
Future minimum annual rental payment of a certain significant lease	$8	'	'

Stockholders_Equity_Details

Stockholders' Equity (Details) (USD $)	1 Months Ended		12 Months Ended
In Millions, except Per Share data, unless otherwise specified	Dec. 31, 2012	Apr. 30, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Stockholders's Equity (Textuals) [Abstract]	'	'	'	'	'
Proceeds from Issuance of Common Stock	$1,600	$887	$18	$2,550	$49
Common Stock, Dividends, Per Share, Declared	'	'	$1.44	$1.20	$0.78
Stock Issued During Period, Shares, New Issues	53	30	'	'	'
Equity Issuance, Per Share Amount	$31	$30.59	'	'	'
Statement [Line Items]	'	'	'	'	'
Total, Beginning Balance	'	'	-362	'	'
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	'	'	163	'	'
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	'	'	35	'	'
Other comprehensive income (loss)	'	'	198	27	-88
Total, Ending Balance	-362	'	-164	-362	'
Reclassifications Out Of Accumulated Other Comprehensive Income [Abstract]	'	'	'	'	'
Product sales	'	'	-3,921	-4,757	-5,398
Reclassifications before income tax	'	'	-1,080	-1,289	-1,202
Provision (benefit) for income taxes	'	'	401	360	124
Reclassification out of Accumulated Other Comprehensive Income [Member]	'	'	'	'	'
Reclassifications Out Of Accumulated Other Comprehensive Income [Abstract]	'	'	'	'	'
Reclassifications before income tax	'	'	57	'	'
Provision (benefit) for income taxes	'	'	-22	'	'
Reclassifications during the period	'	'	35	'	'
Cash flow hedging activities [Member]	'	'	'	'	'
Statement [Line Items]	'	'	'	'	'
Total, Beginning Balance	'	'	-1	'	'
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	'	'	1	'	'
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	'	'	-1	'	'
Other comprehensive income (loss)	'	'	0	'	'
Total, Ending Balance	'	'	-1	'	'
Cash flow hedging activities [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]	'	'	'	'	'
Reclassifications Out Of Accumulated Other Comprehensive Income [Abstract]	'	'	'	'	'
Reclassifications before income tax	'	'	-1	'	'
Cash flow hedging activities [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Energy Commodity Contract [Member]	'	'	'	'	'
Reclassifications Out Of Accumulated Other Comprehensive Income [Abstract]	'	'	'	'	'
Product sales	'	'	-1	'	'
Foreign currency translation [Member]	'	'	'	'	'
Statement [Line Items]	'	'	'	'	'
Total, Beginning Balance	'	'	169	'	'
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	'	'	-41	'	'
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	'	'	0	'	'
Other comprehensive income (loss)	'	'	-41	'	'
Total, Ending Balance	'	'	128	'	'
Pension and other postretirement benefits [Member]	'	'	'	'	'
Statement [Line Items]	'	'	'	'	'
Total, Beginning Balance	'	'	-530	'	'
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	'	'	203	'	'
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	'	'	36	'	'
Other comprehensive income (loss)	'	'	239	'	'
Total, Ending Balance	'	'	-291	'	'
Pension and other postretirement benefits [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]	'	'	'	'	'
Reclassifications Out Of Accumulated Other Comprehensive Income [Abstract]	'	'	'	'	'
Amortization of prior service cost (credit) included in net periodic benefit cost	'	'	-3	'	'
Amortization of actuarial (gain) loss included in net periodic benefit cost	'	'	61	'	'
Reclassifications before income tax	'	'	$58	'	'

Stockholders_Equity_Stockholde

Stockholders' Equity Stockholders Rights Plan (Details) (USD $)	Oct. 12, 2007
Class of Stock [Line Items]	'
Minimum percentage for exercising right	15.00%
Threshold percentage to divest of common stock	14.90%
Redeemed price if rights have not exercised and expired in 2014	0.01
Minimum percentage of assets cash flow and earning power sold	50.00%
Right To receive common stock upon exercise	2
Series A Junior Participating Preferred Stock [Member]	'
Class of Stock [Line Items]	'
Number of shares purchaseable under each right	0.005
Exercise price of right	50

StockBased_Compensation_Detail

Stock-Based Compensation (Details) (USD $)	12 Months Ended
In Millions, except Per Share data, unless otherwise specified	Dec. 31, 2013
Summary of stock option activity and related information	'
Options Outstanding, Beginning Balance	6.9
Weighted Average Exercise Price, Beginning Balance	$19.10
Options, Granted	0.9
Weighted Average Exercise Price, Granted	$33.57
Options, Exercised	-1.1
Weighted Average Exercise Price, Exercised	$13.34
Options Outstanding, Ending Balance	6.7
Weighted Average Exercise Price, Ending Balance	$21.82
Aggregate Intrinsic Value, Ending Balance	$112
Options Exercisable at December 31, 2013	5
Weighted Average Exercise Price, Exercisable at December 31, 2013	$18.70
Aggregate Intrinsic Value, Exercisable at December 31, 2013	$98

StockBased_Compensation_Detail1

Stock-Based Compensation (Details 2) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Estimated fair value at date of grant of options for common stock granted	'	'	'
Weighted-average grant date fair value of options for our common stock granted during the year, per share	$5.94	$5.65	$6.28
Weighted-average assumptions:	'	'	'
Dividend yield	4.30%	3.70%	3.60%
Volatility	29.70%	30.00%	34.60%
Risk-free interest rate	1.40%	1.30%	2.80%
Expected life (years)	'6 years 6 months	'6 years 6 months	'6 years 6 months

StockBased_Compensation_Detail2

Stock-Based Compensation (Details 3) (USD $)	12 Months Ended
In Millions, except Per Share data, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Summary of nonvested restricted stock unit activity and related information	'		'		'
Restricted Stock Units, Nonvested shares, Beginning Balance	3.9		'		'
Nonvested, Weighted-Average Fair Value, Beginning Balance	$22.49	[1]	'		'
Granted, Shares	1.2		'		'
Weighted-average grant date fair value of restricted stock units granted during the year, per share	$30.43	[1]	$20.61		$23.31
Forfeited, Shares	-0.1		'		'
Forfeited, Weighted-Average Fair Value	$27.27	[1]	'		'
Vested, Shares	-1.5		'		'
Vested, Weighted-Average Fair Value	$17.82	[1]	'		'
Restricted Stock Units, Nonvested shares, Ending Balance	3.5		3.9		'
Nonvested, Weighted-Average Fair Value, Ending Balance	$27.16	[1]	$22.49	[1]	'
[1]	Performance-based shares are valued utilizing a Monte Carlo valuation method using measures of total shareholder return. All other shares are valued at the grant-date market price or the grant-date market price less dividends projected to be paid over the vesting period. Restricted stock units generally vest after three years.

StockBased_Compensation_Detail3

Stock-Based Compensation (Details 4) (USD $)	12 Months Ended
In Millions, except Per Share data, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012	Dec. 31, 2011
Other restricted stock unit information	'		'	'
Weighted-average grant date fair value of restricted stock units granted during the year, per share	$30.43	[1]	$20.61	$23.31
Total fair value of restricted stock units vested during the year ($'s in millions)	$27		$22	$35
[1]	Performance-based shares are valued utilizing a Monte Carlo valuation method using measures of total shareholder return. All other shares are valued at the grant-date market price or the grant-date market price less dividends projected to be paid over the vesting period. Restricted stock units generally vest after three years.

StockBased_Compensation_Detail4

Stock-Based Compensation (Details Textuals) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	20-May-10	17-May-07
Stock Based Compensation (Textuals) [Abstract]	'	'	'	'	'
Shares reserved for issuance	24,000,000	'	'	11,000,000	19,000,000
Shares available for future grants	14,000,000	'	'	'	'
Maximum number of shares of common stock available for sale under employee stock purchase plan	2,000,000	'	'	'	'
Maximum annual amount for purchase of common stock per participant under employee stock purchase plan	$15,000	'	'	'	'
Number of shares eligible for employee to purchase per offering period	750	'	'	'	'
Percentage of purchase price is the lower of closing price of either the first or the last day of the offering period	85.00%	'	'	'	'
No. of shares purchases by employees	203,000	'	'	'	'
Average price of shares purchased	$27.62	'	'	'	'
Shares available for purchase under Employee stock purchase plan	413,000	'	'	'	'
Amortization of stock-based awards	37,000,000	36,000,000	52,000,000	'	'
Tax benefit from stock-based compensation expense	14,000,000	13,000,000	19,000,000	'	'
Unrecognized stock-based compensation expense	44,000,000	'	'	'	'
Estimated forfeitures under employee stock-based awards	1,000,000	'	'	'	'
Unrecognized stock-based compensation expense, Weighted-average period of recognition in years	'1 year 10 months	'	'	'	'
Total intrinsic value of options exercised	23,000,000	69,000,000	55,000,000	'	'
Tax benefit realized from stock options exercise	9,000,000	25,000,000	21,000,000	'	'
Cash received from stock option exercises	13,000,000	50,000,000	45,000,000	'	'
Stock Options Outstanding, Weighted Average Remaining Contractual Life	'5 years 1 month	'	'	'	'
Stock Options Exercisable, Weighted Average Remaining Contractual Life	'3 years 11 months	'	'	'	'
Performance based nonvested restricted stock units as a percent of total nonvested restricted stock units outstanding	32.00%	'	'	'	'
Minimum [Member]	'	'	'	'	'
Stock Based Compensation (Textuals) [Abstract]	'	'	'	'	'
Range of vested shares based on extent to which certain financial targets are achieved	0.00%	'	'	'	'
Maximum [Member]	'	'	'	'	'
Stock Based Compensation (Textuals) [Abstract]	'	'	'	'	'
Range of vested shares based on extent to which certain financial targets are achieved	200.00%	'	'	'	'
Discontinued operations [Member]	'	'	'	'	'
Stock Based Compensation (Textuals) [Abstract]	'	'	'	'	'
Amortization of stock-based awards	'	'	18,000,000	'	'
Nonvested Restricted Stock Units [Member]	'	'	'	'	'
Stock Based Compensation (Textuals) [Abstract]	'	'	'	'	'
Unrecognized stock-based compensation expense	40,000,000	'	'	'	'
Stock options [Member]	'	'	'	'	'
Stock Based Compensation (Textuals) [Abstract]	'	'	'	'	'
Unrecognized stock-based compensation expense	$4,000,000	'	'	'	'

Fair_Value_Measurements_Detail

Fair Value Measurements (Details) (USD $)

Dec. 31, 2013

Dec. 31, 2012

Mar. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

In Millions, unless otherwise specified

Former Venezuela Operations [Member]

Carrying Amount [Member]

Carrying Amount [Member]

Carrying Amount [Member]

Fair Value [Member]

Fair Value [Member]

Fair Value [Member]

Level 1 [Member]

Level 1 [Member]

Level 2 [Member]

Level 2 [Member]

Level 3 [Member]

Level 3 [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Wiltel Guarantee [Member]

Wiltel Guarantee [Member]

Former Venezuela Operations [Member]

Former Venezuela Operations [Member]

Carrying Amount [Member]

Carrying Amount [Member]

Carrying Amount [Member]

Carrying Amount [Member]

Fair Value [Member]

Fair Value [Member]

Fair Value [Member]

Fair Value [Member]

Level 1 [Member]

Level 1 [Member]

Level 1 [Member]

Level 1 [Member]

Level 2 [Member]

Level 2 [Member]

Level 2 [Member]

Level 2 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Not Designated as Hedging Instrument [Member]

Not Designated as Hedging Instrument [Member]

Not Designated as Hedging Instrument [Member]

Not Designated as Hedging Instrument [Member]

Not Designated as Hedging Instrument [Member]

Not Designated as Hedging Instrument [Member]

Not Designated as Hedging Instrument [Member]

Not Designated as Hedging Instrument [Member]

Not Designated as Hedging Instrument [Member]

Not Designated as Hedging Instrument [Member]

Measured on a recurring basis:

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

ARO Trust investments

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$33

$18

'

'

$33

$18

'

'

$33

$18

'

'

$0

$0

'

'

$0

$0

'

'

'

'

Energy derivatives assets

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

3

5

'

'

3

5

'

'

0

0

'

'

0

0

'

'

3

5

'

'

Energy derivative liabilities

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

-3

-1

'

'

-3

-1

'

'

0

0

'

'

-1

0

'

'

-2

-1

'

'

Additional disclosure:

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Notes receivable and other

'

'

'

77

95

'

140

138

'

1

2

6

8

133

128

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Long-term debt, including current portion

'

'

'

-11,353

[1]

-10,734

[1]

'

-11,971

[1]

-12,388

[1]

'

0

[1]

0

[1]

-11,971

[1]

-12,388

[1]

0

[1]

0

[1]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Guarantee

'

'

'

-32

-33

'

-29

-31

'

0

0

-29

-31

0

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Fair Value, Level 1 to level 2 Transfers, Amount

0

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Fair Value, Level 2 to level 1 Transfers, Amount

0

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Notes Receivable, Fair Value Disclosure

'

'

88

'

'

35

'

'

97

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Guarantor Obligations, Maximum Exposure, Undiscounted

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

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'

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'

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$35

$36

[1]

Excludes capital leases

Fair_Value_Measurements_Detail1

Fair Value Measurements (Details Guarantees and Credit Risk) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Receivables by product or service [Line Items]	'	'	'
Receivables by product or service	674	688	'
Sales Revenue, Net [Member] | Customer Concentration Risk [Member]	'	'	'
Receivables by product or service [Line Items]	'	'	'
Consolidated revenue, major customer, percentage	9.00%	14.00%	17.00%
Customer accounted for ten percent of consolidated revenues	1	1	1
Income tax receivable [Member]	'	'	'
Receivables by product or service [Line Items]	'	'	'
Receivables by product or service	74	68	'
NGLs, natural gas, and related products and services [Member]	'	'	'
Receivables by product or service [Line Items]	'	'	'
Receivables by product or service	341	411	'
Transportation of natural gas and related products [Member]	'	'	'
Receivables by product or service [Line Items]	'	'	'
Receivables by product or service	193	170	'
Other Receivable [Member]	'	'	'
Receivables by product or service [Line Items]	'	'	'
Receivables by product or service	66	39	'
Wpx Guarantee [Member]	'	'	'
Guarantor Obligations [Line Items]	'	'	'
Guarantor Obligations, Maximum Exposure, Undiscounted	69	'	'
Wiltel Guarantee [Member]	'	'	'
Guarantor Obligations [Line Items]	'	'	'
Guarantor Obligations, Maximum Exposure, Undiscounted	35	36	'

Contingent_Liabilities_and_Com1

Contingent Liabilities and Commitments (Details Textual) (USD $)	Dec. 31, 2013	Dec. 11, 2013	Dec. 31, 2012	Jan. 31, 2008	Jan. 31, 2008	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2011	Dec. 31, 2008	Dec. 31, 2006
				Gulsby-Bay	Gulsby	Northwest Pipeline LLC [Member]	Former Operations	Natural gas underground storage facilities	Gulf Liquids	Gulf Liquids	Gulf Liquids
Loss Contingencies [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Accrued Environmental Loss liabilities	$47,000,000	'	'	'	'	$13,000,000	$27,000,000	$7,000,000	'	'	'
Estimated exposure for actual damages	'	'	'	'	'	'	'	'	'	'	68,000,000
Potential interest in addition to actual damages	'	'	'	'	'	'	'	'	'	'	20,000,000
Possible utlimate judgement in excess of accrual	'	'	'	'	'	'	'	'	'	'	199,000,000
Litigation award against Gulf Liquids, Damages	'	'	'	4,000,000	11,000,000	'	'	'	'	'	'
Loss contingency accrual reduction	'	'	'	'	'	'	'	'	33,000,000	43,000,000	'
Loss contingency accrued interest reduction	'	'	'	'	'	'	'	'	14,000,000	11,000,000	'
Loss Contingency, Range of Possible Loss	32,000,000	'	'	'	'	'	'	'	'	'	'
Customer Refund Liability, Current	98,000,000	'	0	'	'	'	'	'	'	'	'
Notice of Penalty	'	99,000	'	'	'	'	'	'	'	'	'
Commitments for construction and acquisition of property, plant and equipment	$1,500,000,000	'	'	'	'	'	'	'	'	'	'

Segment_Disclosures_Details

Segment Disclosures (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Revenues from external customers:	'	'	'
Revenues from external customers	$6,860	$7,486	$7,930
Long-lived assets:	'	'	'
Long-lived assets	20,500	17,820	12,624
United States [Member]	'	'	'
Revenues from external customers:	'	'	'
Revenues from external customers	6,703	7,335	7,728
Long-lived assets:	'	'	'
Long-lived assets	19,260	16,940	12,041
Canada [Member]	'	'	'
Revenues from external customers:	'	'	'
Revenues from external customers	157	151	202
Long-lived assets:	'	'	'
Long-lived assets	$1,240	$880	$583

Segment_Disclosures_Details_1

Segment Disclosures (Details 1) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Segment revenues:	'		'		'
Total revenues	$6,860		$7,486		$7,930
Segment profit (loss)	1,701		1,960		2,216
Equity earnings (losses)	134	[1]	111	[1]	155	[1]
Income (loss) from investments	28	[1]	49	[1]	7	[1]
Operating income (loss)	1,375		1,612		1,867
Other financial information:	'		'		'
Depreciation and amortization	815		756		661
Total assets and equity method investments by reporting segment	'		'		'
Total assets	27,142		24,327		'
Equity Method Investments	4,360		3,987		'
Service [Member]	'		'		'
Segment revenues:	'		'		'
Total revenues	2,939		2,729		2,532
Product [Member]	'		'		'
Segment revenues:	'		'		'
Total revenues	3,921		4,757		5,398
Williams Partners [Member] | Service [Member]	'		'		'
Segment revenues:	'		'		'
Total revenues	2,910		2,709		2,517
Williams Partners [Member] | Product [Member]	'		'		'
Segment revenues:	'		'		'
Total revenues	3,775		4,611		5,197
Williams NGL & Petchem Services [Member] | Service [Member]	'		'		'
Segment revenues:	'		'		'
Total revenues	4		5		1
Williams NGL & Petchem Services [Member] | Product [Member]	'		'		'
Segment revenues:	'		'		'
Total revenues	146		146		201
Access Midstream Partners [Member] | Service [Member]	'		'		'
Segment revenues:	'		'		'
Total revenues	0		0		0
Access Midstream Partners [Member] | Product [Member]	'		'		'
Segment revenues:	'		'		'
Total revenues	0		0		0
Other [Member] | Service [Member]	'		'		'
Segment revenues:	'		'		'
Total revenues	25		15		14
Other [Member] | Product [Member]	'		'		'
Segment revenues:	'		'		'
Total revenues	0		0		0
Operating Segments [Member]	'		'		'
Segment revenues:	'		'		'
Operating income (loss)	1,539		1,800		2,054
Other financial information:	'		'		'
Additions to long-lived assets	3,731		6,018		1,530
Depreciation and amortization	815		756		661
Operating Segments [Member] | Williams Partners [Member]	'		'		'
Segment revenues:	'		'		'
Total revenues	6,685		7,320		7,714
Segment profit (loss)	1,606		1,812		2,035
Equity earnings (losses)	104		111		142
Income (loss) from investments	0		0		0
Operating income (loss)	1,502		1,701		1,893
Other financial information:	'		'		'
Additions to long-lived assets	3,055		5,562		1,273
Depreciation and amortization	758		714		621
Total assets and equity method investments by reporting segment	'		'		'
Total assets	22,358		19,709		'
Equity Method Investments	2,187		1,800		'
Operating Segments [Member] | Williams Partners [Member] | Service [Member]	'		'		'
Segment revenues:	'		'		'
Total revenues	2,910		2,709		2,517
Operating Segments [Member] | Williams Partners [Member] | Product [Member]	'		'		'
Segment revenues:	'		'		'
Total revenues	3,775		4,611		5,197
Operating Segments [Member] | Williams NGL & Petchem Services [Member]	'		'		'
Segment revenues:	'		'		'
Total revenues	273		279		341
Segment profit (loss)	38		99		157
Equity earnings (losses)	0		0		0
Income (loss) from investments	-3		-4		-4
Operating income (loss)	41		103		161
Other financial information:	'		'		'
Additions to long-lived assets	649		425		211
Depreciation and amortization	33		20		16
Total assets and equity method investments by reporting segment	'		'		'
Total assets	1,711		1,134		'
Equity Method Investments	12		0		'
Operating Segments [Member] | Williams NGL & Petchem Services [Member] | Service [Member]	'		'		'
Segment revenues:	'		'		'
Total revenues	4		5		1
Operating Segments [Member] | Williams NGL & Petchem Services [Member] | Product [Member]	'		'		'
Segment revenues:	'		'		'
Total revenues	269		274		340
Operating Segments [Member] | Access Midstream Partners [Member]	'		'		'
Segment revenues:	'		'		'
Total revenues	0		0		0
Segment profit (loss)	61		0		0
Equity earnings (losses)	30		0		0
Income (loss) from investments	31		0		0
Operating income (loss)	0		0		0
Other financial information:	'		'		'
Additions to long-lived assets	0		0		0
Depreciation and amortization	0		0		0
Total assets and equity method investments by reporting segment	'		'		'
Total assets	2,161		2,187		'
Equity Method Investments	2,161		2,187		'
Operating Segments [Member] | Access Midstream Partners [Member] | Service [Member]	'		'		'
Segment revenues:	'		'		'
Total revenues	0		0		0
Operating Segments [Member] | Access Midstream Partners [Member] | Product [Member]	'		'		'
Segment revenues:	'		'		'
Total revenues	0		0		0
Operating Segments [Member] | Other [Member]	'		'		'
Segment revenues:	'		'		'
Total revenues	36		27		25
Segment profit (loss)	-4		49		24
Equity earnings (losses)	0		0		13
Income (loss) from investments	0		53		11
Operating income (loss)	-4		-4		0
Other financial information:	'		'		'
Additions to long-lived assets	27		31		46
Depreciation and amortization	24		22		24
Total assets and equity method investments by reporting segment	'		'		'
Total assets	1,625		1,782		'
Equity Method Investments	0		0		'
Operating Segments [Member] | Other [Member] | Service [Member]	'		'		'
Segment revenues:	'		'		'
Total revenues	36		27		25
Operating Segments [Member] | Other [Member] | Product [Member]	'		'		'
Segment revenues:	'		'		'
Total revenues	0		0		0
Intersegment Elimination [Member]	'		'		'
Segment revenues:	'		'		'
Total revenues	-134		-140		-150
Other financial information:	'		'		'
Additions to long-lived assets	0		0		0
Depreciation and amortization	0		0		0
Total assets and equity method investments by reporting segment	'		'		'
Total assets	-713		-485		'
Equity Method Investments	0		0		'
Intersegment Elimination [Member] | Service [Member]	'		'		'
Segment revenues:	'		'		'
Total revenues	-11		-12		-11
Intersegment Elimination [Member] | Product [Member]	'		'		'
Segment revenues:	'		'		'
Total revenues	-123		-128		-139
Intersegment Elimination [Member] | Williams Partners [Member] | Service [Member]	'		'		'
Segment revenues:	'		'		'
Total revenues	0		0		0
Intersegment Elimination [Member] | Williams Partners [Member] | Product [Member]	'		'		'
Segment revenues:	'		'		'
Total revenues	0		0		0
Intersegment Elimination [Member] | Williams NGL & Petchem Services [Member] | Service [Member]	'		'		'
Segment revenues:	'		'		'
Total revenues	0		0		0
Intersegment Elimination [Member] | Williams NGL & Petchem Services [Member] | Product [Member]	'		'		'
Segment revenues:	'		'		'
Total revenues	-123		-128		-139
Intersegment Elimination [Member] | Access Midstream Partners [Member] | Service [Member]	'		'		'
Segment revenues:	'		'		'
Total revenues	0		0		0
Intersegment Elimination [Member] | Access Midstream Partners [Member] | Product [Member]	'		'		'
Segment revenues:	'		'		'
Total revenues	0		0		0
Intersegment Elimination [Member] | Other [Member] | Service [Member]	'		'		'
Segment revenues:	'		'		'
Total revenues	-11		-12		-11
Intersegment Elimination [Member] | Other [Member] | Product [Member]	'		'		'
Segment revenues:	'		'		'
Total revenues	0		0		0
General Corporate Expenses [Member]	'		'		'
Segment revenues:	'		'		'
Operating income (loss)	($164)		($188)		($187)
[1]	Items also included in Segment profit (loss). (See Note 18 b Segment Disclosures.)

Segment_Disclosures_Details_Te

Segment Disclosures (Details Textual) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2011
Segment Reporting [Abstract]	'
Revenues from former exploration and production business now shown as external	$310
Costs attributable to former exploration and production business now shown as external	$845

Subsequent_Events_Details

Subsequent Events (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Feb. 28, 2014	Feb. 25, 2014
			Subsequent Event [Member]	Subsequent Event [Member]
Subsequent Event [Line Items]	'	'	'	'
Commercial paper	$225,000,000	$0	'	$900,000,000
Total consideration received from contribution of operations	'	'	1,200,000,000	'
Proceeds from Divestiture of Businesses	'	'	25,000,000	'
Number of Class D shares received from contribution of operations	'	'	25,577,521	'
Master limited partnership, general partner ownership percentage	'	'	2.00%	'
Dollar amount of potential future purchases of Class D units	'	'	$200,000,000	'

Schedule_I_Condensed_Financial1

Schedule I Condensed Financial Information Of Parent Company Only (Details) (USD $)	1 Months Ended		12 Months Ended
Share data in Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2012	Apr. 30, 2012	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Condensed Statement Of Comprehensive Income Parent Company Only [Abstract]	'	'	'		'		'		'
Income (Loss) from Equity Method Investments	'	'	$134,000,000	[1]	$111,000,000	[1]	$155,000,000	[1]	'
Interest incurred - external	'	'	-611,000,000		-568,000,000		-598,000,000		'
Early debt retirement costs	'	'	0		0		-271,000,000		'
Other income (expense) - net	'	'	0		-2,000,000		11,000,000		'
Income from continuing operations before income taxes	'	'	1,080,000,000		1,289,000,000		1,202,000,000		'
Provision for income taxes	'	'	401,000,000		360,000,000		124,000,000		'
Income (loss) from continuing operations	'	'	441,000,000		723,000,000		803,000,000		'
Income (loss) from discontinued operations	'	'	-11,000,000		136,000,000		-427,000,000		'
Net income (loss)	'	'	430,000,000		859,000,000		376,000,000		'
Basic earnings (loss) per common share:	'	'	'		'		'		'
Income (loss) from continuing operations	'	'	$0.65		$1.17		$1.36		'
Income (loss) from discontinued operations	'	'	($0.02)		$0.22		($0.72)		'
Net income (loss)	'	'	$0.63		$1.39		$0.64		'
Weighted-average shares (thousands)	'	'	682,948		619,792		588,553		'
Diluted earnings (loss) per common share:	'	'	'		'		'		'
Income (loss) from continuing operations	'	'	$0.64		$1.15		$1.34		'
Income (loss) from discontinued operations	'	'	($0.02)		$0.22		($0.71)		'
Net income (loss)	'	'	$0.62		$1.37		$0.63		'
Weighted-average shares (thousands)	'	'	687,185		625,486		598,175		'
Other comprehensive income (loss):	'	'	'		'		'		'
Other comprehensive income (loss)	'	'	198,000,000		27,000,000		-88,000,000		'
Comprehensive Income (loss) attributable to The Williams Companies, Inc.	'	'	628,000,000		886,000,000		288,000,000		'
Assets, Current [Abstract]	'	'	'		'		'		'
Cash and cash equivalents	839,000,000	'	681,000,000		839,000,000		'		'
Other current assets and deferred charges	105,000,000	'	107,000,000		105,000,000		'		'
Total current assets	1,924,000,000	'	1,683,000,000		1,924,000,000		'		'
Property, plant, and equipment - net	15,467,000,000	'	18,210,000,000		15,467,000,000		'		'
Other noncurrent assets	596,000,000	'	599,000,000		596,000,000		'		'
Total assets	24,327,000,000	'	27,142,000,000		24,327,000,000		'		'
Liabilities, Current [Abstract]	'	'	'		'		'		'
Long-term debt due within one year	1,000,000	'	1,000,000		1,000,000		'		'
Total current liabilities	1,549,000,000	'	1,983,000,000		1,549,000,000		'		'
Long-term debt	10,735,000,000	'	11,353,000,000		10,735,000,000		'		'
Deferred income taxes	2,841,000,000	'	3,529,000,000		2,841,000,000		'		'
Contingent liabilities and commitments	'	'	'		'		'		'
Equity: [Abstract]	'	'	'		'		'		'
Common stock	716,000,000	'	718,000,000		716,000,000		'		'
Total stockholders' equity	7,427,000,000	'	8,921,000,000		7,427,000,000		2,586,000,000		8,134,000,000
Total liabilities and stockholders' equity	24,327,000,000	'	27,142,000,000		24,327,000,000		'		'
Condensed Statement Of Cash Flows Parent Company Only [Abstract]	'	'	'		'		'		'
Net Cash Provided by (Used in) Operating Activities	'	'	2,217,000,000		1,835,000,000		3,439,000,000		'
FINANCING ACTIVITIES:	'	'	'		'		'		'
Proceeds from long-term debt	'	'	2,699,000,000		3,486,000,000		3,172,000,000		'
Payments of long-term debt	'	'	-2,081,000,000		-1,468,000,000		-2,055,000,000		'
Premiums paid on early debt retirements	'	'	0		0		-254,000,000		'
Proceeds from issuance of common stock	1,600,000,000	887,000,000	18,000,000		2,550,000,000		49,000,000		'
Dividends paid	'	'	-982,000,000		-742,000,000		-457,000,000		'
Other - net	'	'	2,000,000		25,000,000		-57,000,000		'
Net cash provided (used) by financing activities	'	'	1,677,000,000		5,036,000,000		-342,000,000		'
INVESTING ACTIVITIES:	'	'	'		'		'		'
Other - net	'	'	-19,000,000		108,000,000		29,000,000		'
Net cash provided (used) by investing activities	'	'	-4,052,000,000		-6,921,000,000		-3,003,000,000		'
Increase (decrease) in cash and cash equivalents	'	'	-158,000,000		-50,000,000		94,000,000		'
Cash and cash equivalents at beginning of period	'	'	839,000,000		'		'		'
Cash and cash equivalents at end of period	839,000,000	'	681,000,000		839,000,000		'		'
Parent Company [Member]	'	'	'		'		'		'
Condensed Statement Of Comprehensive Income Parent Company Only [Abstract]	'	'	'		'		'		'
Income (Loss) from Subsidiaries, before Tax	'	'	1,564,000,000		1,895,000,000		1,962,000,000		'
Income (Loss) from Equity Method Investments	'	'	30,000,000		0		0		'
Interest incurred - external	'	'	-156,000,000		-128,000,000		-186,000,000		'
Interest incurred - affiliate	'	'	-722,000,000		-816,000,000		-622,000,000		'
Interest income - affiliate	'	'	71,000,000		84,000,000		84,000,000		'
Early debt retirement costs	'	'	0		0		-271,000,000		'
Other income (expense) - net	'	'	32,000,000		3,000,000		-45,000,000		'
Income from continuing operations before income taxes	'	'	819,000,000		1,038,000,000		922,000,000		'
Provision for income taxes	'	'	378,000,000		315,000,000		119,000,000		'
Income (loss) from continuing operations	'	'	441,000,000		723,000,000		803,000,000		'
Income (loss) from discontinued operations	'	'	-11,000,000		136,000,000		-427,000,000		'
Net income (loss)	'	'	430,000,000		859,000,000		376,000,000		'
Basic earnings (loss) per common share:	'	'	'		'		'		'
Income (loss) from continuing operations	'	'	$0.65		$1.17		$1.36		'
Income (loss) from discontinued operations	'	'	($0.02)		$0.22		($0.72)		'
Net income (loss)	'	'	$0.63		$1.39		$0.64		'
Weighted-average shares (thousands)	'	'	682,948		619,792		588,553		'
Diluted earnings (loss) per common share:	'	'	'		'		'		'
Income (loss) from continuing operations	'	'	$0.64		$1.15		$1.34		'
Income (loss) from discontinued operations	'	'	($0.02)		$0.22		($0.71)		'
Net income (loss)	'	'	$0.62		$1.37		$0.63		'
Weighted-average shares (thousands)	'	'	687,185		625,486		598,175		'
Other comprehensive income (loss):	'	'	'		'		'		'
Equity in other comprehensive income (loss) of consolidated subsidiaries	'	'	-41,000,000		21,000,000		35,000,000		'
Other comprehensive income (loss) attributable to The Williams Companies, Inc.	'	'	239,000,000		6,000,000		-123,000,000		'
Other comprehensive income (loss)	'	'	198,000,000		27,000,000		-88,000,000		'
Comprehensive Income (loss) attributable to The Williams Companies, Inc.	'	'	628,000,000		886,000,000		288,000,000		'
Assets, Current [Abstract]	'	'	'		'		'		'
Cash and cash equivalents	340,000,000	'	282,000,000		340,000,000		292,000,000		'
Other current assets and deferred charges	229,000,000	'	167,000,000		229,000,000		'		'
Total current assets	569,000,000	'	449,000,000		569,000,000		'		'
Investments in and advances to consolidated subsidiaries	16,686,000,000	'	19,162,000,000		16,686,000,000		'		'
Investment in Access Midstream Partners	2,187,000,000	'	2,161,000,000		2,187,000,000		'		'
Property, plant, and equipment - net	62,000,000	'	68,000,000		62,000,000		'		'
Other noncurrent assets	117,000,000	'	34,000,000		117,000,000		'		'
Total assets	19,621,000,000	'	21,874,000,000		19,621,000,000		'		'
Liabilities, Current [Abstract]	'	'	'		'		'		'
Accounts payable	29,000,000	'	26,000,000		29,000,000		'		'
Long-term debt due within one year	1,000,000	'	1,000,000		1,000,000		'		'
Other current liabilities	122,000,000	'	147,000,000		122,000,000		'		'
Total current liabilities	152,000,000	'	174,000,000		152,000,000		'		'
Long-term debt	2,298,000,000	'	2,296,000,000		2,298,000,000		'		'
Notes payable affiliates	8,938,000,000	'	10,830,000,000		8,938,000,000		'		'
Pension, other postretirement and other noncurrent liabilities	712,000,000	'	282,000,000		712,000,000		'		'
Deferred income taxes	2,769,000,000	'	3,428,000,000		2,769,000,000		'		'
Contingent liabilities and commitments	'	'	'		'		'		'
Equity: [Abstract]	'	'	'		'		'		'
Common stock	716,000,000	'	718,000,000		716,000,000		'		'
Other stockholders' equity	4,036,000,000	'	4,146,000,000		4,036,000,000		'		'
Total stockholders' equity	4,752,000,000	'	4,864,000,000		4,752,000,000		'		'
Total liabilities and stockholders' equity	19,621,000,000	'	21,874,000,000		19,621,000,000		'		'
Condensed Statement Of Cash Flows Parent Company Only [Abstract]	'	'	'		'		'		'
Net Cash Provided by (Used in) Operating Activities	'	'	19,000,000		-11,000,000		-286,000,000		'
FINANCING ACTIVITIES:	'	'	'		'		'		'
Proceeds from long-term debt	'	'	0		848,000,000		75,000,000		'
Payments of long-term debt	'	'	-1,000,000		-28,000,000		-871,000,000		'
Changes in notes payable to affiliates	'	'	1,892,000,000		520,000,000		-590,000,000		'
Tax benefit of stock-based awards	'	'	19,000,000		44,000,000		22,000,000		'
Premiums paid on early debt retirements	'	'	0		0		-254,000,000		'
Proceeds from issuance of common stock	'	'	18,000,000		2,550,000,000		49,000,000		'
Dividends paid	'	'	-982,000,000		-742,000,000		-457,000,000		'
Other - net	'	'	-3,000,000		-7,000,000		-5,000,000		'
Net cash provided (used) by financing activities	'	'	943,000,000		3,185,000,000		-2,031,000,000		'
INVESTING ACTIVITIES:	'	'	'		'		'		'
Capital expenditures	'	'	-23,000,000		-18,000,000		-28,000,000		'
Purchase of investment in Access Midstream Partners	'	'	-4,000,000		-2,179,000,000		0		'
Changes in investments in and advances to consolidated subsidiaries	'	'	-985,000,000		-953,000,000		2,553,000,000		'
Other - net	'	'	-8,000,000		24,000,000		-18,000,000		'
Net cash provided (used) by investing activities	'	'	-1,020,000,000		-3,126,000,000		2,507,000,000		'
Increase (decrease) in cash and cash equivalents	'	'	-58,000,000		48,000,000		190,000,000		'
Cash and cash equivalents at beginning of period	'	'	340,000,000		292,000,000		102,000,000		'
Cash and cash equivalents at end of period	340,000,000	'	282,000,000		340,000,000		292,000,000		'
Guarantees [Abstract]	'	'	'		'		'		'
Guarantor Obligations, Maximum Exposure, Undiscounted	'	'	3,800,000,000		'		'		'
Cash Dividends Received [Abstract]	'	'	'		'		'		'
Proceeds from Dividends Received	'	'	$1,500,000,000		$1,100,000,000		$1,200,000,000		'
[1]	Items also included in Segment profit (loss). (See Note 18 b Segment Disclosures.)

Schedule_II_Valuation_and_Qual1

Schedule II Valuation and Qualifying Accounts (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Allowance for doubtful accounts and for notes receivable [Member]	'		'		'
Valuation And Qualifying Accounts	'		'		'
Beginning Balance	$0	[1]	$1	[1]	$15	[2]
Additions Charged (Credited) To Cost and Expenses	0		0		1
Additions Other	0		0		0
Deductions	0		1	[3]	15	[4]
Ending Balance	0	[1]	0	[1]	1	[1]
Deferred Tax Asset Valuation Allowance [Member]	'		'		'
Valuation And Qualifying Accounts	'		'		'
Beginning Balance	144	[1]	145	[1]	249	[5]
Additions Charged (Credited) To Cost and Expenses	37		-1		-33
Additions Other	0		0		0
Deductions	0		0		71	[4]
Ending Balance	$181	[1]	$144	[1]	$145	[1]
[1]	Deducted from related assets.
[2]	Deducted from related assets, primarily included in assets of discontinued operations.
[3]	Represents balances written off, reclassifications, and recoveries.
[4]	Includes balance deductions due to the spin-off of our exploration and production business on DecemberB 31, 2011.
[5]	Deducted primarily from related assets, with a portion included in assets of discontinued operations.