Shareholders' Equity (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended							9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023		Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Shareholders' equity activity [Roll Forward]
Beginning Balance	$ 8,727	$ 8,445	$ 7,977		$ 7,148	$ 7,033	$ 6,728	$ 7,977	$ 6,728
Net income (loss)	724	616	655		549	117	264	1,995	930
Other comprehensive income (loss)	1	1	1		(2)	(1)	5	3	2
Cash dividends	(144)	(144)	(145)		(110)	(109)	(108)
Stock Repurchased During Period, Value	(200)	(250)	(100)
Stock plans	84	61	60		59	114	144
Other	3	2	3		(1)	6
Ending Balance	$ 9,189	$ 8,727	$ 8,445		$ 7,645	$ 7,148	$ 7,033	$ 9,189	7,645
Common Stock, Dividends, Per Share, Declared	$ 0.16	$ 0.16	$ 0.16		$ 0.12	$ 0.12	$ 0.12
Stock Repurchased During Period, Shares								5.1
Common Shares
Shareholders' equity activity [Roll Forward]
Beginning Balance	$ 2,663	$ 2,664	$ 2,664		$ 2,665	$ 2,665	$ 2,665	$ 2,664	2,665
Net income (loss)	0	0	0		0	0	0
Other comprehensive income (loss)	0	0	0		0	0	0
Cash dividends	0	0	0		0	0	0
Stock Repurchased During Period, Value	0	0	0
Stock plans	0	1	0		1	0	0
Other	0	0	0		0	0
Ending Balance	2,663	2,663	2,664		2,664	2,665	2,665	2,663	2,664
Paid-in Capital in Excess of Par Value
Shareholders' equity activity [Roll Forward]
Beginning Balance	0	0	50		0	0	32	50	32
Net income (loss)	0	0	0		0	0	0
Other comprehensive income (loss)	0	0	0		0	0	0
Cash dividends	0	0	0		0	0	0
Stock Repurchased During Period, Value	0	0	0
Stock plans	26	0	50		32	0	32
Other	0	0	0		0	0
Ending Balance	26	0	0		32	0	0	26	32
Retained Earnings
Shareholders' equity activity [Roll Forward]
Beginning Balance	11,459	11,075	10,572		9,617	9,780	9,710	10,572	9,710
Net income (loss)	716	610	651		544	109	263
Other comprehensive income (loss)	0	0	0		0	0	0
Cash dividends	(144)	(144)	(145)		(110)	(109)	(108)
Stock Repurchased During Period, Value	0	0	0
Stock plans	13	82	3	[1]	27	163	85
Other	0	0	0		0	0
Ending Balance	12,018	11,459	11,075		10,024	9,617	9,780	12,018	10,024
Accumulated Other Comprehensive Income (Loss)
Shareholders' equity activity [Roll Forward]
Beginning Balance	(228)	(229)	(230)		(179)	(178)	(183)	(230)	(183)
Net income (loss)	0	0	0		0	0	0
Other comprehensive income (loss)	1	1	1		(2)	(1)	5
Cash dividends	0	0	0		0	0	0
Stock Repurchased During Period, Value	0	0	0
Stock plans	0	0	0		0	0	0
Other	0	0	0		0	0
Ending Balance	(227)	(228)	(229)		(181)	(179)	(178)	(227)	(181)
Noncontrolling Interest in Consolidated Subsidiaries
Shareholders' equity activity [Roll Forward]
Beginning Balance	34	30	29		18	16	15	29	15
Net income (loss)	8	6	4		5	8	1
Other comprehensive income (loss)	0	0	0		0	0	0
Cash dividends	0	0	0		0	0	0
Stock Repurchased During Period, Value	0	0	0
Stock plans	0	0	0		0	0	0
Other	3	2	3		(1)	6
Ending Balance	39	34	30		24	18	16	39	24
Treasury Stock, Common
Shareholders' equity activity [Roll Forward]
Beginning Balance	(5,201)	(5,095)	(5,108)		(4,973)	(5,250)	(5,511)	(5,108)	(5,511)
Net income (loss)	0	0	0		0	0	0
Other comprehensive income (loss)	0	0	0		0	0	0
Cash dividends	0	0	0		0	0	0
Stock Repurchased During Period, Value	200	250	100
Stock plans	71	144	113		55	277	261
Other	0	0	0		0	0
Ending Balance	$ (5,330)	$ (5,201)	$ (5,095)		$ (4,918)	$ (4,973)	$ (5,250)	$ (5,330)	$ (4,918)

[1] In the first, second, and third quarters of 2023, we issued common stock from treasury shares for stock options exercised, restricted stock grants, and purchases under our employee stock purchase plan. As a result, additional paid in capital was reduced to zero as of the end of each period, which resulted in a reduction of retained earnings by $3 million, $82 million, and $13 million respectively. Future issuances from treasury shares could similarly impact additional paid in capital and retained earnings.