Acquisitions (Tables)

12 Months Ended

Dec. 31, 2022

Business Acquisition [Line Items]

Business Acquisition, Pro Forma Information [Table Text Block]

The following pro forma Revenues and Net income (loss) attributable to The Williams Companies, Inc. in 2022, 2021, and 2020, are presented as if the Trace Acquisition had been completed on January 1, 2021, and the Sequent Acquisition had been completed on January 1, 2020. These pro forma amounts are not necessarily indicative of what the actual results would have been if the Trace Acquisition and Sequent Acquisition had in fact occurred on the dates or for the periods indicated, nor do they purport to project Revenues or Net income (loss) attributable to The Williams Companies, Inc. for any future periods or as of any date. These amounts do not give effect to any potential cost savings, operating synergies, or revenue enhancements to result from the transaction or the potential costs to achieve these cost savings, operating synergies, and revenue enhancements.

	Year Ended December 31, 2022
	As Reported		Pro Forma Trace (1)				Pro Forma Combined
	(Millions)
Revenues	$	10,965	$	45			$	11,010
Net income (loss) attributable to The Williams Companies, Inc.	2,049		18				2,067
	Year Ended December 31, 2021
	As Reported		Pro Forma Trace		Pro Forma Sequent (2)		Pro Forma Combined
	(Millions)
Revenues	$	10,627	$	118	$	188	$	10,933
Net income (loss) attributable to The Williams Companies, Inc.	1,517		42		4		1,563
	Year Ended December 31, 2020
	As Reported				Pro Forma Sequent		Pro Forma Combined
	(Millions)
Revenues	$	7,719			$	74	$	7,793
Net income (loss) attributable to The Williams Companies, Inc.	211				(13)		198

(1)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.

(2)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.

Trace Midstream Acquisition

Business Acquisition [Line Items]

Schedule of Recognized Identified Assets Acquired and Liabilities Assumed

The following table presents the allocation of the acquisition date fair value of the major classes of the assets acquired, which are presented in the West segment, and liabilities assumed at April 29, 2022. The fair value of accounts receivable acquired equals contractual amounts receivable.

	(Millions)
Cash and cash equivalents	$	39
Trade accounts and other receivables – net	18
Property, plant, and equipment – net	448
Intangible assets – net of accumulated amortization	472
Other noncurrent assets	20
Total assets acquired	$	997
Accounts payable	$	12
Accrued and other current liabilities	5
Other noncurrent liabilities	8
Total liabilities assumed	$	25
Net assets acquired	$	972

Sequent Acquisition

Business Acquisition [Line Items]

Schedule of Recognized Identified Assets Acquired and Liabilities Assumed

We accounted for the Sequent Acquisition as a business combination. The following table presents the allocation of the acquisition date fair value of the major classes of the assets acquired, which are presented in the Gas & NGL Marketing Services segment, and liabilities assumed at July 1, 2021. The fair value of accounts receivable acquired equals contractual amounts receivable. The fair value of the intangible assets was measured using an income approach. The fair value of the inventory acquired was based on the market price of the natural gas in underground storage at the acquisition date. See Note 15 – Fair Value Measurements, Guarantees, and Concentration of Credit Risk for the valuation techniques used to measure fair value of derivative assets and liabilities.

	(Millions)
Cash and cash equivalents	$	8
Trade accounts and other receivables – net	498
Inventories	121
Derivative assets	57
Other current assets and deferred charges	4
Property, plant, and equipment – net	5
Intangible assets – net of accumulated amortization	306
Other noncurrent assets	3
Commodity derivatives included in other noncurrent assets	49
Total assets acquired	$	1,051
Accounts payable	$	514
Derivative liabilities	116
Accrued and other current liabilities	46
Other noncurrent liabilities	1
Commodity derivatives included in other noncurrent liabilities	215
Total liabilities assumed	$	892
Net assets acquired	$	159