Shareholders' Equity (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended								6 Months Ended
	Jun. 30, 2024		Mar. 31, 2024		Jun. 30, 2023		Mar. 31, 2023		Jun. 30, 2024	Jun. 30, 2023
Shareholders' equity activity [Roll Forward]
Beginning Balance	$ 9,682		$ 9,433		$ 8,445		$ 7,977		$ 9,433	$ 7,977
Net income (loss)	713		609		616		655		1,322	1,271
Other comprehensive income (loss)	0		0		1		1		0	2
Cash dividends	(151)		(151)		(144)		(145)
Stock Repurchased During Period, Value	(250)		(250)		(250)		(100)
Stock plans	56		41		61		60
Other	4		0		2		3
Ending Balance	$ 10,046		$ 9,682		$ 8,727		$ 8,445		10,046	8,727
Common Stock, Dividends, Per Share, Declared	$ 0.17		$ 0.17		$ 0.16		$ 0.16
Stock Repurchased During Period, Shares	6.9				8.1
Common Shares
Shareholders' equity activity [Roll Forward]
Beginning Balance	$ 2,662		$ 2,663		$ 2,664		$ 2,664		2,663	2,664
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		0		0
Stock plans	1		1		1		0
Other	0		0		0		0
Ending Balance	2,663		2,662		2,663		2,664		2,663	2,663
Paid-in Capital in Excess of Par Value
Shareholders' equity activity [Roll Forward]
Beginning Balance	0		63		0		50		63	50
Net income (loss)	0		0		0		0
Other comprehensive income (loss)	0		0				0
Cash dividends	0		0		0		0
Stock Repurchased During Period, Value	0		0		0		0
Stock plans	0		63		0		50
Other	0		0		0		0
Ending Balance	0		0		0		0		0	0
Retained Earnings
Shareholders' equity activity [Roll Forward]
Beginning Balance	12,988		12,536		11,075		10,572		12,536	10,572
Net income (loss)	709		606		610		651
Other comprehensive income (loss)	0		0		0		0
Cash dividends	(151)		(151)		(144)		(145)
Stock Repurchased During Period, Value	0		0		0		0
Stock plans	96	[1]	3	[1]	82	[2]	3	[2]
Other	0		0		0		0
Ending Balance	13,450		12,988		11,459		11,075		13,450	11,459
Accumulated Other Comprehensive Income (Loss)
Shareholders' equity activity [Roll Forward]
Beginning Balance	(332)		(331)		(229)		(230)		(331)	(230)
Net income (loss)	0		0		0		0
Other comprehensive income (loss)	0		(1)		1		1
Cash dividends	0		0		0		0
Stock Repurchased During Period, Value	0		0		0		0
Stock plans	0		0		0		0
Other	0		0		0		0
Ending Balance	(332)		(332)		(228)		(229)		(332)	(228)
Noncontrolling Interest in Consolidated Subsidiaries
Shareholders' equity activity [Roll Forward]
Beginning Balance	46		42		30		29		42	29
Net income (loss)	4		3		6		4
Other comprehensive income (loss)	0		1		0		0
Cash dividends	0		0		0		0
Stock Repurchased During Period, Value	0		0		0		0
Stock plans	0		0		0		0
Other	4		0		2		3
Ending Balance	46		46		34		30		46	34
Treasury Stock, Common
Shareholders' equity activity [Roll Forward]
Beginning Balance	(5,682)		(5,540)		(5,095)		(5,108)		(5,540)	(5,108)
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		250		250		100
Stock plans	151		108		144		113
Other	0		0		0		0
Ending Balance	$ (5,781)		$ (5,682)		$ (5,201)		$ (5,095)		$ (5,781)	$ (5,201)

[1] In the first quarter and second quarter of 2024, we issued common stock from treasury shares for stock options exercised, restricted stock grants, performance shares under our performance unit program, and purchases under our employee stock purchase plan. As a result, additional paid in capital was reduced to zero, which resulted in a reduction of retained earnings by $3 million and $96 million. Future issuances from treasury shares could similarly impact additional paid in capital and retained earnings.

[2] In the first quarter and second quarter of 2023, we issued common stock from treasury shares for stock options exercised, restricted stock grants, performance shares under our performance unit program, and purchases under our employee stock purchase plan. As a result, additional paid in capital was reduced to zero, 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.