Consolidated Statements of Shareholders' Equity - USD ($) $ in Millions	Total	Common Stock	Paid-in Capital in Excess of Par Value	Treasury Stock	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interest in Consolidated Subsidiaries
Beginning balance at Dec. 31, 2019	$ 8,025	$ 2,669	$ 143	$ (6,427)	$ 11,989	$ (362)	$ 13
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(2,942)	0	0	0	(2,945)	0	3
Other comprehensive income (loss)	0
Cash dividends	(278)	0	0	0	(278)	0
Cash dividends - Noncontrolling interest							0
Stock plans	285	(3)	(143)	506	(75)	0	0
Stock repurchase program	(100)	0	0	(100)	0	0	0
Other	(7)	0	0	0	0	0	(7)
Ending balance at Dec. 31, 2020	$ 4,983	2,666	0	(6,021)	8,691	(362)	9
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock, Dividends, Per Share, Declared	$ 0.315
Net income (loss)	$ 1,468	0	0	0	1,457	0	11
Other comprehensive income (loss)	179	0	0	0	0	179	0
Cash dividends	(161)	0	0	0	(161)	0
Cash dividends - Noncontrolling interest							0
Stock plans	264	(1)	32	510	(277)	0	0
Other	(5)	0	0	0	0	0	(5)
Ending balance at Dec. 31, 2021	$ 6,728	2,665	32	(5,511)	9,710	(183)	15
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock, Dividends, Per Share, Declared	$ 0.18
Net income (loss)	$ 1,595	0	0	0	1,572	0	23
Other comprehensive income (loss)	(47)	0	0	0	0	(47)	0
Cash dividends	(435)	0	0	0	(435)	0
Cash dividends - Noncontrolling interest							0
Stock plans	395	(1)	18	653	(275)	0	0
Stock repurchase program	(250)	0	0	(250)	0	0	0
Other	(9)	0	0	0	0	0	(9)
Ending balance at Dec. 31, 2022	$ 7,977	$ 2,664	$ 50	$ (5,108)	$ 10,572	$ (230)	$ 29
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock, Dividends, Per Share, Declared	$ 0.48