Shareholders' Equity (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended					6 Months Ended
	Jun. 30, 2023	Mar. 31, 2023		Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022
Shareholders' equity activity [Roll Forward]
Beginning Balance	$ 8,445	$ 7,977		$ 7,033	$ 6,728	$ 7,977	$ 6,728
Net income (loss)	616	655		117	264	1,271	381
Other comprehensive income (loss)	1	1		(1)	5	2	4
Cash dividends	(144)	(145)		(109)	(108)
Stock Repurchased During Period, Value	(250)	(100)
Stock plans	61	60		114	144
Other	2	3		6
Ending Balance	$ 8,727	$ 8,445		$ 7,148	$ 7,033	$ 8,727	7,148
Common Stock, Dividends, Per Share, Declared	$ 0.16	$ 0.16		$ 0.12	$ 0.12
Stock Repurchased During Period, Shares						8.1
Common Shares
Shareholders' equity activity [Roll Forward]
Beginning Balance	$ 2,664	$ 2,664		$ 2,665	$ 2,665	$ 2,664	2,665
Net income (loss)	0	0		0	0
Other comprehensive income (loss)	0	0		0	0
Cash dividends	0	0		0	0
Stock Repurchased During Period, Value	0	0
Stock plans	1	0		0	0
Other	0	0		0
Ending Balance	2,663	2,664		2,665	2,665	2,663	2,665
Paid-in Capital in Excess of Par Value
Shareholders' equity activity [Roll Forward]
Beginning Balance	0	50		0	32	50	32
Net income (loss)	0	0		0	0
Other comprehensive income (loss)	0	0		0	0
Cash dividends	0	0		0	0
Stock Repurchased During Period, Value	0	0
Stock plans	0	50		0	32
Other	0	0		0
Ending Balance	0	0		0	0	0	0
Treasury Stock
Shareholders' equity activity [Roll Forward]
Beginning Balance	(5,095)	(5,108)		(5,250)	(5,511)	(5,108)	(5,511)
Net income (loss)	0	0		0	0
Other comprehensive income (loss)	0	0		0	0
Cash dividends	0	0		0	0
Stock Repurchased During Period, Value	250	100
Stock plans	144	113		277	261
Other	0	0		0
Ending Balance	(5,201)	(5,095)		(4,973)	(5,250)	(5,201)	(4,973)
Retained Earnings
Shareholders' equity activity [Roll Forward]
Beginning Balance	11,075	10,572		9,780	9,710	10,572	9,710
Net income (loss)	610	651		109	263
Other comprehensive income (loss)	0	0		0	0
Cash dividends	(144)	(145)		(109)	(108)
Stock Repurchased During Period, Value	0	0
Stock plans	82	3	[1]	163	85
Other	0	0		0
Ending Balance	11,459	11,075		9,617	9,780	11,459	9,617
Accumulated Other Comprehensive Income (Loss)
Shareholders' equity activity [Roll Forward]
Beginning Balance	(229)	(230)		(178)	(183)	(230)	(183)
Net income (loss)	0	0		0	0
Other comprehensive income (loss)	1	1		(1)	5
Cash dividends	0	0		0	0
Stock Repurchased During Period, Value	0	0
Stock plans	0	0		0	0
Other	0	0		0
Ending Balance	(228)	(229)		(179)	(178)	(228)	(179)
Noncontrolling Interest in Consolidated Subsidiaries
Shareholders' equity activity [Roll Forward]
Beginning Balance	30	29		16	15	29	15
Net income (loss)	6	4		8	1
Other comprehensive income (loss)	0	0		0	0
Cash dividends	0	0		0	0
Stock Repurchased During Period, Value	0	0
Stock plans	0	0		0	0
Other	2	3		6
Ending Balance	$ 34	$ 30		$ 18	$ 16	$ 34	$ 18

[1] In the first quarter and second quarter 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 and $82 million, respectively. Future issuances from treasury shares could similarly impact additional paid in capital and retained earnings.