Acquisitions (Details) - USD ($) $ in Millions					6 Months Ended	8 Months Ended	12 Months Ended
		Aug. 31, 2022	Apr. 29, 2022	Jul. 01, 2021	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2022		Dec. 31, 2021		Dec. 31, 2020
Business Acquisition [Line Items]
Revenues							$ 10,965		$ 10,627		$ 7,719
Modified EBITDA Earnings Loss							6,075		5,494		4,851
Net income (loss) attributable to The Williams Companies, Inc.							2,049		1,517		211
Payments to Acquire Productive Assets							3,598		1,855		1,283
Pro Forma [Member]
Business Acquisition [Line Items]
Business Acquisition, Pro Forma Revenue							11,010		10,933		7,793
Business Acquisition, Pro Forma Net Income (Loss)							2,067		1,563		198
Product [Member]
Business Acquisition [Line Items]
Revenues							4,556		4,536		1,671
Energy Commodities and Service
Business Acquisition [Line Items]
Revenues	[1]						(387)		(148)		(5)
Gain (Loss) on Derivative Instruments | Energy Related Derivative | Not Designated as Hedging Instrument [Member]
Business Acquisition [Line Items]
Unrealized Gain (Loss) on Derivatives							(296)		(109)		0
West [Member] | Product [Member]
Business Acquisition [Line Items]
Revenues							145		60		20
West [Member] | Energy Commodities and Service
Business Acquisition [Line Items]
Revenues	[1]						(4)		(44)		(2)
West [Member] | Operating Segments [Member]
Business Acquisition [Line Items]
Revenues							2,561		2,026		1,523
Modified EBITDA Earnings Loss							1,211		961		947
Payments to Acquire Productive Assets							1,507		209		318
West [Member] | Operating Segments [Member] | Product [Member]
Business Acquisition [Line Items]
Revenues							841		643		152
Gas & NGL Marketing Services | Product [Member]
Business Acquisition [Line Items]
Revenues							4,052	[2]	4,094		1,491
Gas & NGL Marketing Services | Energy Commodities and Service
Business Acquisition [Line Items]
Revenues	[1]						(304)		(84)		(3)
Gas & NGL Marketing Services | Operating Segments [Member]
Business Acquisition [Line Items]
Revenues							3,233	[2]	4,211		1,631
Modified EBITDA Earnings Loss	[3]						(40)		22		51
Payments to Acquire Productive Assets							4		1		0
Gas & NGL Marketing Services | Operating Segments [Member] | Product [Member]
Business Acquisition [Line Items]
Revenues							3,534	[2]	4,292		1,602
Transmission And Gulf Of Mexico [Member] | NorTex Acquisition
Business Acquisition [Line Items]
Payments to Acquire Productive Assets		$ 424
Transmission And Gulf Of Mexico [Member] | Product [Member]
Business Acquisition [Line Items]
Revenues							228		231		144
Transmission And Gulf Of Mexico [Member] | Energy Commodities and Service
Business Acquisition [Line Items]
Revenues	[1]						0		0		0
Transmission And Gulf Of Mexico [Member] | Operating Segments [Member]
Business Acquisition [Line Items]
Revenues							4,047		3,786		3,469
Modified EBITDA Earnings Loss							2,674		2,621		2,379
Payments to Acquire Productive Assets							1,420		861		706
Transmission And Gulf Of Mexico [Member] | Operating Segments [Member] | Product [Member]
Business Acquisition [Line Items]
Revenues							404		349		191
Trace Midstream Acquisition
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired			100.00%
Business Combination, Consideration Transferred			$ 972
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents			39
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables			18
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment			448
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles			472
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets			20
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets			997
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable			12
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other			5
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other			8
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities			25
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net			$ 972
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life			20 years
Percentage Of Finite Lived Intangible Assets Impacted By Our Intent Or Ability To Renew Or Extend Arrangement			2.00%
Acquired Finite-lived Intangible Asset, Weighted-Average Period before Renewal or Extension			19 years
Trace Midstream Acquisition | Pro Forma [Member]
Business Acquisition [Line Items]
Business Acquisition, Pro Forma Revenue							45	[4]	118
Business Acquisition, Pro Forma Net Income (Loss)							$ 18	[4]	42
Trace Midstream Acquisition | West [Member] | Selling, general and administrative expenses [Member]
Business Acquisition [Line Items]
Business Combination, Acquisition Related Costs						$ 8
Trace Midstream Acquisition | West [Member] | Operating Segments [Member]
Business Acquisition [Line Items]
Revenues						148
Modified EBITDA Earnings Loss						$ 73
Sequent Acquisition
Business Acquisition [Line Items]
Business Combination, Consideration Transferred				$ 159
Business Combination Working Capital Acquired				109
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents				8
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables				498
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory				121
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other				4
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment				5
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles				306
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets				3
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets				1,051
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable				514
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other				46
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other				1
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities				892
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net				$ 159
Sequent Acquisition | Pro Forma [Member]
Business Acquisition [Line Items]
Business Acquisition, Pro Forma Revenue									188	[5]	74
Business Acquisition, Pro Forma Net Income (Loss)									$ 4	[5]	$ (13)
Sequent Acquisition | Minimum [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life				1 year
Sequent Acquisition | Maximum [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life				8 years
Sequent Acquisition | Derivative
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other				$ 57
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets				49
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other				116
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other				$ 215
Sequent Acquisition | Gas & NGL Marketing Services
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired				100.00%
Sequent Acquisition | Gas & NGL Marketing Services | Energy Commodities and Service
Business Acquisition [Line Items]
Revenues					$ (43)
Sequent Acquisition | Gas & NGL Marketing Services | Selling, general and administrative expenses [Member]
Business Acquisition [Line Items]
Business Combination, Acquisition Related Costs					5
Sequent Acquisition | Gas & NGL Marketing Services | Gain (Loss) on Derivative Instruments | Energy Related Derivative | Not Designated as Hedging Instrument [Member]
Business Acquisition [Line Items]
Unrealized Gain (Loss) on Derivatives					(109)
Sequent Acquisition | Gas & NGL Marketing Services | Operating Segments [Member]
Business Acquisition [Line Items]
Modified EBITDA Earnings Loss					(112)
Sequent Acquisition | Gas & NGL Marketing Services | Operating Segments [Member] | Product [Member]
Business Acquisition [Line Items]
Revenues					(43)
Affiliate Costs					$ 80

[1] We record transactions that qualify as derivatives at fair value with changes in fair value recognized in earnings in the period of change and characterized as unrealized gains or losses. Gains and losses on derivatives held for energy trading purposes are presented on a net basis in revenue.

[2] See Note 1 – General, Description of Business, Basis of Presentation, and Summary of Significant Accounting Policies.

[3] Modified EBITDA for 2022, 2021, and 2020, includes charges of $161 million, $15 million, and $17 million respectively, associated with lower of cost or net realizable value adjustments to our inventory. These charges are reflected in Product Sales or Product costs in our Consolidated Statement of Income (see Note 1 – General, Description of Business, Basis of Presentation, and Summary of Significant Accounting Policies). Net unrealized commodity-related derivatives gains of $47 million in 2022 and $0 in 2021 and 2020 are reflected in Net processing commodity expenses.

[4] Excludes results from operations acquired in the Trace Acquisition for the period beginning on the acquisition date of April 29, 2022, as these results are included in the amounts as reported.

[5] Excludes results from operations acquired in the Sequent Acquisition for the period beginning on the acquisition date of July 1, 2021, as these results are included in the amounts as reported.