Shareholders' Equity (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2025	Jun. 30, 2025	Mar. 31, 2025	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2025	Sep. 30, 2024
Shareholders' equity activity [Roll Forward]
Beginning Balance	$ 10,547	$ 10,409	$ 10,548	$ 10,046	$ 9,682	$ 9,433	$ 10,548	$ 9,433
Net income (loss)	20	480	203	580	713	609	703	1,902
Cash dividends	(144)	(145)	(147)	(150)	(151)	(151)
Stock Repurchased During Period, Value	(252)	(252)	(252)	(198)	(251)	(250)
Stock plans	(74)	(60)	(58)	(70)	(57)	(41)
Other	1	8	(5)	(1)	4	0
Ending Balance	10,246	10,547	10,409	10,352	10,046	9,682	10,246	10,352
Other comprehensive income (loss), net of income taxes	$ 2	$ 3	$ (6)	$ 3	$ 0	$ 0	(1)	3
Common Stock, Dividends, Per Share, Declared	$ 0.17	$ 0.17	$ 0.17	$ 0.17	$ 0.17	$ 0.17
Stock Repurchased During Period, Shares	11.3			6.2
Common Shares
Shareholders' equity activity [Roll Forward]
Beginning Balance	$ 2,661	$ 2,661	$ 2,662	$ 2,663	$ 2,662	$ 2,663	2,662	2,663
Net income (loss)	0	0	0	0	0	0
Cash dividends	0	0	0	0	0	0
Stock Repurchased During Period, Value	0	0	0	0	0	0
Stock plans	(2)	0	(1)	(1)	(1)	(1)
Other	0	0	0	0	0	0
Ending Balance	2,659	2,661	2,661	2,662	2,663	2,662	2,659	2,662
Other comprehensive income (loss), net of income taxes	0	0	0	0	0	0
Paid-in Capital in Excess of Par Value
Shareholders' equity activity [Roll Forward]
Beginning Balance	31	59	79	0	0	63	79	63
Net income (loss)	0	0	0	0	0	0
Cash dividends	0	0	0	0	0	0
Stock Repurchased During Period, Value	0	0	0	0	0	0
Stock plans	(43)	(28)	(24)	(38)	0	(63)
Other	0	0	(4)	0	0	0
Ending Balance	74	31	59	38	0	0	74	38
Other comprehensive income (loss), net of income taxes	0	0	0	0	0	0
Retained Earnings
Shareholders' equity activity [Roll Forward]
Beginning Balance	14,716	14,389	14,332	13,450	12,988	12,536	14,332	12,536
Net income (loss)	18	472	204	571	709	606
Cash dividends	(144)	(145)	(147)	(150)	(151)	(151)
Stock Repurchased During Period, Value	0	0	0	0	0	0
Stock plans	0	0	0	(6)	(96)	(3)
Other	0	0	0	0	0	0
Ending Balance	14,590	14,716	14,389	13,865	13,450	12,988	14,590	13,865
Other comprehensive income (loss), net of income taxes	0	0	0	0	0	0
Accumulated Other Comprehensive Income (Loss)
Shareholders' equity activity [Roll Forward]
Beginning Balance	(356)	(359)	(353)	(332)	(332)	(331)	(353)	(331)
Net income (loss)	0	0	0	0	0	0
Cash dividends	0	0	0	0	0	0
Stock Repurchased During Period, Value	0	0	0	0	0	0
Stock plans	0	0	0	0	0	0
Other	0	0	0	0	0	0
Ending Balance	(354)	(356)	(359)	(329)	(332)	(332)	(354)	(329)
Other comprehensive income (loss), net of income taxes	2	3	(6)	3	0	(1)
Noncontrolling Interest in Consolidated Subsidiaries
Shareholders' equity activity [Roll Forward]
Beginning Balance	42	42	42	46	46	42	42	42
Net income (loss)	2	8	(1)	9	4	3
Cash dividends	0	0	0	0	0	0
Stock Repurchased During Period, Value	0	0	0	0	0	0
Stock plans	0	0	0	0	0	0
Other	1	8	(1)	(1)	4	0
Ending Balance	43	42	42	56	46	46	43	56
Other comprehensive income (loss), net of income taxes	0	0	0	0	0	1
Treasury Stock, Common
Shareholders' equity activity [Roll Forward]
Beginning Balance	(6,547)	(6,383)	(6,214)	(5,781)	(5,682)	(5,540)	(6,214)	(5,540)
Net income (loss)	0	0	0	0	0	0
Cash dividends	0	0	0	0	0	0
Stock Repurchased During Period, Value	252	252	252	198	251	250
Stock plans	(33)	(88)	(83)	(39)	(152)	(108)
Other	0	0	0	0	0	0
Ending Balance	(6,766)	(6,547)	(6,383)	(5,940)	(5,781)	(5,682)	$ (6,766)	$ (5,940)
Other comprehensive income (loss), net of income taxes	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0