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, 2020	$ 14,583	$ 11,769	$ 35	$ 1,248	$ 24,371	$ (12,748)	$ (96)	$ (1,041)	$ 2,814
Net income (loss)	435	426	0	0	0	426	0	0	9
Other comprehensive income (loss)	(4)	(4)	0	0	0	0	(4)	0	0
Cash dividends – common stock	(498)	(498)	0	0	0	(498)	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	11	11	0	1	10	0	0	0	0
Contributions from noncontrolling interests	2	0	0	0	0	0	0	0	2
Other	(2)	(2)	0	0	3	(5)	0	0	0
Net increase (decrease) in equity	(110)	(67)	0	1	13	(77)	(4)	0	(43)
Period End at Mar. 31, 2021	14,473	11,702	35	1,249	24,384	(12,825)	(100)	(1,041)	2,771
Period Start at Dec. 31, 2021	14,101	11,423	35	1,250	24,449	(13,237)	(33)	(1,041)	2,678
Net income (loss)	392	380	0	0	0	380	0	0	12
Other comprehensive income (loss)	5	5	0	0	0	0	5	0	0
Cash dividends – common stock	(518)	(518)	0	0	0	(518)	0	0	0
Dividends and distributions to noncontrolling interests	(37)	0	0	0	0	0	0	0	(37)
Stock-based compensation and related common stock issuances, net of tax	29	29	0	2	27	0	0	0	0
Contributions from noncontrolling interests	3	0	0	0	0	0	0	0	3
Other	(4)	(3)	0	0	0	(3)	0	0	(1)
Net increase (decrease) in equity	(130)	(107)	0	2	27	(141)	5	0	(23)
Period End at Mar. 31, 2022	$ 13,971	$ 11,316	$ 35	$ 1,252	$ 24,476	$ (13,378)	$ (28)	$ (1,041)	$ 2,655