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, 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 ($0.4475 per share)	(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
Period Start at Dec. 31, 2022	14,045	11,485	35	1,253	24,542	(13,271)	(24)	(1,050)	2,560
Net income (loss)	957	927	0	0	0	927	0	0	30
Other comprehensive income (loss)	21	21	0	0	0	0	21	0	0
Cash dividends – common stock ($0.4475 per share)	(546)	(546)	0	0	0	(546)	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	(23)	(23)	0	3	(26)	0	0	0	0
Contributions from noncontrolling interests	3	0	0	0	0	0	0	0	3
Purchases of treasury stock	(74)	(74)	0	0	0	0	0	(74)	0
Other	(6)	(5)	0	0	0	(5)	0	0	(1)
Net increase (decrease) in equity	278	300	0	3	(26)	376	21	(74)	(22)
Period End at Mar. 31, 2023	$ 14,323	$ 11,785	$ 35	$ 1,256	$ 24,516	$ (12,895)	$ (3)	$ (1,124)	$ 2,538