Consolidated Statement of Changes in Equity - USD ($) $ in Millions	Total	Preferred Stock	Common Stock	Capital in Excess of Par Value	Retained Deficit	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Total Stockholders' Equity	Noncontrolling Interests
Beginning balance at Dec. 31, 2019	$ 16,364	$ 35	$ 1,247	$ 24,323	$ (11,002)	$ (199)	$ (1,041)	$ 13,363	$ 3,001
Net income (loss)	198	0	0	0	211	0	0	211	(13)
Other comprehensive income (loss)	103	0	0	0	0	103	0	103	0
Dividends, Common Stock, Cash	(1,941)	0	0	0	(1,941)	0	0	(1,941)	0
Dividends and distributions to noncontrolling interests	(185)	0	0	0	0	0	0	0	(185)
Stock-based compensation and related common stock issuances, net of tax	51	0	1	50	0	0	0	51	0
Contributions from noncontrolling interests	7	0	0	0	0	0	0	0	7
Other	(14)	0	0	(2)	(16)	0	0	(18)	4
Net increase (decrease) in equity	(1,781)	0	1	48	(1,746)	103	0	(1,594)	(187)
Ending balance at Dec. 31, 2020	14,583	35	1,248	24,371	(12,748)	(96)	(1,041)	11,769	2,814
Net income (loss)	1,562	0	0	0	1,517	0	0	1,517	45
Other comprehensive income (loss)	63	0	0	0	0	63	0	63	0
Dividends, Common Stock, Cash	(1,992)	0	0	0	(1,992)	0	0	(1,992)	0
Dividends and distributions to noncontrolling interests	(187)	0	0	0	0	0	0	0	(187)
Stock-based compensation and related common stock issuances, net of tax	80	0	2	78	0	0	0	80	0
Contributions from noncontrolling interests	9	0	0	0	0	0	0	0	9
Purchase of partial interest in consolidated subsidiary (Note 8)	(3)	0	0	0	0	0	0	0	(3)
Purchase of treasury stock	0
Other	(14)	0	0	0	(14)	0	0	(14)	0
Net increase (decrease) in equity	(482)	0	2	78	(489)	63	0	(346)	(136)
Ending balance at Dec. 31, 2021	14,101	35	1,250	24,449	(13,237)	(33)	(1,041)	11,423	2,678
Net income (loss)	2,117	0	0	0	2,049	0	0	2,049	68
Other comprehensive income (loss)	9	0	0	0	0	9	0	9	0
Dividends, Common Stock, Cash	(2,071)	0	0	0	(2,071)	0	0	(2,071)	0
Dividends and distributions to noncontrolling interests	(204)	0	0	0	0	0	0	0	(204)
Stock-based compensation and related common stock issuances, net of tax	96	0	3	93	0	0	0	96	0
Contributions from noncontrolling interests	18	0	0	0	0	0	0	0	18
Purchase of treasury stock	(9)	0	0	0	0	0	(9)	(9)	0
Other	(12)	0	0	0	(12)	0	0	(12)	0
Net increase (decrease) in equity	(56)	0	3	93	(34)	9	(9)	62	(118)
Ending balance at Dec. 31, 2022	$ 14,045	$ 35	$ 1,253	$ 24,542	$ (13,271)	$ (24)	$ (1,050)	$ 11,485	$ 2,560