Consolidated Statement of Changes in Equity (Unaudited) - USD ($) $ in Millions	Total	Total Stockholders’ Equity	Preferred Stock	Common Stock	Capital in Excess of Par Value	Retained Deficit	AOCI	Treasury Stock	Noncontrolling Interests
Period Start at Dec. 31, 2018	$ 15,997	$ 14,660	$ 35	$ 1,245	$ 24,693	$ (10,002)	$ (270)	$ (1,041)	$ 1,337
Net income (loss)	538	505	0	0	0	505	0	0	33
Other comprehensive income (loss)	5	5	0	0	0	0	5	0	0
Cash dividends – common stock	(921)	(921)	0	0	0	(921)	0	0	0
Dividends and distributions to noncontrolling interests	(68)	0	0	0	0	0	0	0	(68)
Stock-based compensation and related common stock issuances, net of tax	28	28	0	1	27	0	0	0	0
Sales of limited partner units of Williams Partners L.P.	1,333	0	0	0	0	0	0	0	1,333
Changes in ownership of consolidated subsidiaries, net	141	(425)	0	0	(425)	0	0	0	566
Contributions from noncontrolling interests	32	0	0	0	0	0	0	0	32
Other	(4)	(4)	0	0	1	(5)	0	0	0
Net increase (decrease) in equity	1,084	(812)	0	1	(397)	(421)	5	0	1,896
Period End at Jun. 30, 2019	17,081	13,848	35	1,246	24,296	(10,423)	(265)	(1,041)	3,233
Period Start at Dec. 31, 2018	15,997	14,660	35	1,245	24,693	(10,002)	(270)	(1,041)	1,337
Period End at Dec. 31, 2019	16,364	13,363	35	1,247	24,323	(11,002)	(199)	(1,041)	3,001
Period Start at Mar. 31, 2019	15,725	14,406	35	1,246	24,703	(10,270)	(267)	(1,041)	1,319
Net income (loss)	324	310	0	0	0	310	0	0	14
Other comprehensive income (loss)	2	2	0	0	0	0	2	0	0
Cash dividends – common stock	(461)	(461)	0	0	0	(461)	0	0	0
Dividends and distributions to noncontrolling interests	(27)	0	0	0	0	0	0	0	(27)
Stock-based compensation and related common stock issuances, net of tax	17	17	0	0	17	0	0	0	0
Sales of limited partner units of Williams Partners L.P.	1,333	0	0	0	0	0	0	0	1,333
Changes in ownership of consolidated subsidiaries, net	141	(425)	0	0	(425)	0	0	0	566
Contributions from noncontrolling interests	28	0	0	0	0	0	0	0	28
Deconsolidation of subsidiary (Note 5)			0
Other	(1)	(1)		0	1	(2)	0	0	0
Net increase (decrease) in equity	1,356	(558)	0	0	(407)	(153)	2	0	1,914
Period End at Jun. 30, 2019	17,081	13,848	35	1,246	24,296	(10,423)	(265)	(1,041)	3,233
Period Start at Dec. 31, 2019	16,364	13,363	35	1,247	24,323	(11,002)	(199)	(1,041)	3,001
Net income (loss)	(255)	(214)	0	0	0	(214)	0	0	(41)
Other comprehensive income (loss)	23	23	0	0	0	0	23	0	0
Cash dividends – common stock	(971)	(971)	0	0	0	(971)	0	0	0
Dividends and distributions to noncontrolling interests	(98)	0	0	0	0	0	0	0	(98)
Stock-based compensation and related common stock issuances, net of tax	21	21	0	1	20	0	0	0	0
Contributions from noncontrolling interests	4	0	0	0	0	0	0	0	4
Other	(8)	(10)	0	0	0	(10)	0	0	2
Net increase (decrease) in equity	(1,284)	(1,151)	0	1	20	(1,195)	23	0	(133)
Period End at Jun. 30, 2020	15,080	12,212	35	1,248	24,343	(12,197)	(176)	(1,041)	2,868
Period Start at Mar. 31, 2020	15,259	12,354	35	1,248	24,330	(12,013)	(205)	(1,041)	2,905
Net income (loss)	315	303	0	0	0	303	0	0	12
Other comprehensive income (loss)	29	29	0	0	0	0	29	0	0
Cash dividends – common stock	(486)	(486)	0	0	0	(486)	0	0	0
Dividends and distributions to noncontrolling interests	(54)	0	0	0	0	0	0	0	(54)
Stock-based compensation and related common stock issuances, net of tax	13	13	0	0	13	0	0	0	0
Contributions from noncontrolling interests	2	0	0	0	0	0	0	0	2
Other	2	(1)	0	0	0	(1)	0	0	3
Net increase (decrease) in equity	(179)	(142)	0	0	13	(184)	29	0	(37)
Period End at Jun. 30, 2020	$ 15,080	$ 12,212	$ 35	$ 1,248	$ 24,343	$ (12,197)	$ (176)	$ (1,041)	$ 2,868