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)	214	195	0	0	0	195	0	0	19
Other comprehensive income (loss)	3	3	0	0	0	0	3	0	0
Cash dividends – common stock	(460)	(460)	0	0	0	(460)	0	0	0
Dividends and distributions to noncontrolling interests	(41)	0	0	0	0	0	0	0	(41)
Stock-based compensation and related common stock issuances, net of tax	11	11	0	1	10	0	0	0	0
Contributions from noncontrolling interests	4	0	0	0	0	0	0	0	4
Other	(3)	(3)	0	0	0	(3)	0	0	0
Net increase (decrease) in equity	(272)	(254)	0	1	10	(268)	3	0	(18)
Period End at Mar. 31, 2019	15,725	14,406	35	1,246	24,703	(10,270)	(267)	(1,041)	1,319
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
Net income (loss)	(570)	(517)	0	0	0	(517)	0	0	(53)
Other comprehensive income (loss)	(6)	(6)	0	0	0	0	(6)	0	0
Cash dividends – common stock	(485)	(485)	0	0	0	(485)	0	0	0
Dividends and distributions to noncontrolling interests	(44)	0	0	0	0	0	0	0	(44)
Stock-based compensation and related common stock issuances, net of tax	8	8	0	1	7	0	0	0	0
Contributions from noncontrolling interests	2	0	0	0	0	0	0	0	2
Other	(10)	(9)	0	0	0	(9)	0	0	(1)
Net increase (decrease) in equity	(1,105)	(1,009)	0	1	7	(1,011)	(6)	0	(96)
Period End at Mar. 31, 2020	$ 15,259	$ 12,354	$ 35	$ 1,248	$ 24,330	$ (12,013)	$ (205)	$ (1,041)	$ 2,905