Consolidated Statements of Stockholders' Equity - USD ($) $ in Millions	Total	Preferred Stock	Common Stock	Treasury Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Non-controlling Interests
Balance at Dec. 31, 2016	$ 21,497	$ 0	$ 178	$ (9,143)	$ 7,747	$ 22,981	$ (266)	$ 0
Increase (Decrease) in Stockholders' Equity
Net income (loss)	1,311					1,311
Other comprehensive income (loss), net of tax	8						8
Dividends on common stock	(2,357)					(2,357)
Issuance of common stock and other, net	138		1		137
Purchases of treasury stock	(25)			(25)
Balance at Dec. 31, 2017	20,572	0	179	(9,168)	7,884	21,935	(258)	0
Increase (Decrease) in Stockholders' Equity
Net income (loss)	4,131					4,131
Other comprehensive income (loss), net of tax	144						144
Dividends on common stock	(2,374)					(2,374)
Issuance of common stock and other, net	162				162
Purchases of treasury stock	(1,305)			(1,305)
Reclassification of stranded tax effects						58	(58)
Balance at Dec. 31, 2018	21,330	0	179	(10,473)	8,046	23,750	(172)	0
Increase (Decrease) in Stockholders' Equity
Net income (loss)	(522)					(667)		145
Other comprehensive income (loss), net of tax	(49)						(49)
Dividends on common stock	(2,585)					(2,585)
Dividends on preferred stock	(318)					(318)
Issuance of common stock and other, net	6,939		30		6,909
Issuance of preferred stock	9,762	9,762
Purchases of treasury stock	(180)			(180)
Fair value of noncontrolling interest acquired	4,895							4,895
Noncontrolling interest distributions, net	(131)							(131)
Change in control WES	(4,909)							(4,909)
Balance at Dec. 31, 2019	$ 34,232	$ 9,762	$ 209	$ (10,653)	$ 14,955	$ 20,180	$ (221)	$ 0