Acquisitions and Divestitures (Tables)

6 Months Ended

Jun. 30, 2024

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. for the three and six months ended June 30, 2023, are presented as if the Gulf Coast Storage Acquisition had been completed on January 1, 2023, and the DJ Basin Acquisitions and MountainWest Acquisition had been completed on January 1, 2022. These pro forma amounts are not necessarily indicative of what the actual results would have been if the acquisitions 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 transactions or the potential costs to achieve these cost savings, operating synergies, and revenue enhancements.

	Three Months Ended June 30, 2023
	As Reported		Pro Forma Gulf Coast Storage		Pro Forma DJ Basin				Pro Forma Combined
	(Millions)
Revenues	$	2,483	$	48	$	77			$	2,608
Net income (loss) attributable to The Williams Companies, Inc.	460		19		5				484
	Six Months Ended June 30, 2023
	As Reported		Pro Forma Gulf Coast Storage		Pro Forma DJ Basin		Pro Forma MountainWest (1)		Pro Forma Combined
	(Millions)
Revenues	$	5,564	$	94	$	141	$	35	$	5,834
Net income (loss) attributable to The Williams Companies, Inc.	1,387		35		8		6		1,436

(1)Excludes results from operations acquired in the acquisition for the period beginning on the acquisition date, as these results are included in the amounts as reported.

Gulf Coast Storage Acquisition

Business Acquisition [Line Items]

Schedule of Recognized Identified Assets Acquired and Liabilities Assumed

The following table presents the preliminary allocation of the acquisition date fair value of the major classes of the assets acquired and liabilities assumed at January 3, 2024. The allocation is considered preliminary because the valuation work has not been completed due to the ongoing review of the valuation results and validation of significant inputs and assumptions. Preliminary fair value measurements were made for certain acquired assets and liabilities, primarily property, plant, and equipment; however, adjustments to those measurements may be made in subsequent periods, up to one year from the acquisition date, as new information related to facts and circumstances as of the acquisition date may be identified. The fair value of accounts receivable acquired, included in Other current assets in the following table, equals contractual amounts receivable.

	(Millions)
Cash and cash equivalents	$	46
Other current assets	18
Property, plant, and equipment – net	2,035
Other noncurrent assets	2
Total assets acquired	$	2,101
Current liabilities	$	(11)
Noncurrent liabilities	(107)
Total liabilities assumed	$	(118)
Net assets acquired	$	1,983

Cureton Acquisition

Business Acquisition [Line Items]

Schedule of Recognized Identified Assets Acquired and Liabilities Assumed

The following table presents the preliminary allocation of the acquisition date fair value of the major classes of the assets acquired and liabilities assumed at November 30, 2023. The allocation is considered preliminary because the valuation work has not been completed due to the ongoing review of the valuation results and validation of significant inputs and assumptions. Preliminary fair value measurements were made for certain acquired assets and liabilities, primarily property, plant, and equipment and other intangible assets; however, adjustments to those measurements may be made in subsequent periods, up to one year from the acquisition date, as new information related to facts and circumstances as of the acquisition date may be identified. The fair value of accounts receivable acquired, included in Other current assets in the following table, equals contractual amounts receivable.

	(Millions)
Cash and cash equivalents	$	6
Other current assets	21
Property, plant, and equipment – net	435
Intangible assets – net of accumulated amortization	117
Other noncurrent assets	1
Total identifiable assets acquired	$	580
Current liabilities	$	(29)
Noncurrent liabilities	(14)
Total liabilities assumed	$	(43)
Net identifiable assets acquired	$	537
Goodwill included in Intangible assets – net of accumulated amortization	9
Net assets acquired	$	546

RMM Acquisition

Business Acquisition [Line Items]

Schedule of Recognized Identified Assets Acquired and Liabilities Assumed

The following table presents the preliminary allocation of the acquisition date fair value of the major classes of the assets acquired and liabilities assumed at November 30, 2023. The net assets acquired primarily reflect the noncash consideration transferred, which includes the fair value of both our previous equity-method investment and the deferred consideration obligation. The allocation is considered preliminary because the valuation work has not been completed due to the ongoing review of the valuation results and validation of significant inputs and assumptions. Preliminary fair value measurements were made for certain acquired assets and liabilities, primarily property, plant, and equipment and other intangible assets; however, adjustments to those measurements may be made in subsequent periods, up to one year from the acquisition date, as new information related to facts and circumstances as of the acquisition date may be identified. The fair value of accounts receivable acquired, included in Other current assets in the following table, equals contractual amounts receivable.

	(Millions)
Cash and cash equivalents	$	28
Other current assets	4
Investments	20
Property, plant, and equipment – net	1,041
Intangible assets – net of accumulated amortization	63
Other noncurrent assets	12
Total identifiable assets acquired	$	1,168
Current liabilities	$	(44)
Noncurrent liabilities	(103)
Total liabilities assumed	$	(147)
Net identifiable assets acquired	$	1,021
Goodwill included in Intangible assets – net of accumulated amortization	55
Net assets acquired	$	1,076

MountainWest 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 and liabilities assumed at February 14, 2023. The fair value of accounts receivable acquired equals contractual amounts receivable.

	(Millions)
Cash and cash equivalents	$	23
Trade accounts and other receivables	33
Other current assets	26
Investments	20
Property, plant, and equipment – net	1,019
Other noncurrent assets	33
Total identifiable assets acquired	$	1,154
Current liabilities	$	(47)
Long-term debt	(365)
Other noncurrent liabilities	(95)
Total liabilities assumed	$	(507)
Net identifiable assets acquired	$	647
Goodwill included in Intangible assets – net of accumulated amortization	400
Net assets acquired	$	1,047