Consolidated Statement of Operations (Unaudited) - USD ($) shares in Thousands, $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenues:
Revenues		$ 1,781	$ 2,041	$ 3,694	$ 4,095
Costs and expenses:
Operating and maintenance expenses		320	387	657	727
Depreciation and amortization expenses		430	424	859	840
Selling, general, and administrative expenses		127	152	240	280
Impairment of certain assets (Note 12)		0	64	0	76
Impairment of goodwill (Note 12)		0	0	187	0
Other (income) expense – net		6	9	13	41
Total costs and expenses		1,169	1,543	2,651	3,036
Operating income (loss)		612	498	1,043	1,059
Equity earnings (losses) (Note 5)		108	87	130	167
Impairment of equity-method investments (Note 12)		0	2	(938)	(72)
Other investing income (loss) – net (Note 5)		1	124	4	125
Interest incurred		(299)	(306)	(600)	(612)
Interest capitalized		5	10	10	20
Other income (expense) – net		5	7	9	18
Income (loss) before income taxes		432	422	(342)	705
Provision (benefit) for income taxes		117	98	(87)	167
Net income (loss)		315	324	(255)	538
Less: Net income (loss) attributable to noncontrolling interests		12	14	(41)	33
Net income (loss) attributable to The Williams Companies, Inc.		303	310	(214)	505
Preferred stock dividends		0	0	1	1
Net income (loss) available to common stockholders		$ 303	$ 310	$ (215)	$ 504
Basic earnings (loss) per common share:
Net income (loss)		$ 0.25	$ 0.26	$ (0.18)	$ 0.42
Weighted-average shares (thousands)		1,213,601	1,212,045	1,213,310	1,211,769
Diluted earnings (loss) per common share:
Net income (loss)		$ 0.25	$ 0.26	$ (0.18)	$ 0.41
Weighted-average shares (thousands)	[1]	1,214,581	1,214,065	1,213,310	1,213,830
Service [Member]
Revenues:
Revenues		$ 1,446	$ 1,489	$ 2,920	$ 2,929
NonRegulated Service Commodity Consideration [Member]
Revenues:
Revenues		25	56	53	120
Product [Member]
Revenues:
Revenues		310	496	721	1,046
Oil and Gas, Purchased [Member]
Costs and expenses:
Product costs		271	483	667	1,008
Natural Gas Purchased For Shrink [Member]
Costs and expenses:
Product costs		$ 15	$ 24	$ 28	$ 64

[1] For the six months ended June 30, 2020, 1.1 million weighted-average nonvested restricted stock units have been excluded from the computation of diluted earnings (loss) per common share as their inclusion would be antidilutive due to our loss available to common stockholders.