Shareholders' Equity (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024	Dec. 31, 2023
Shareholders' Equity Activity Summarization [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 10,409	$ 9,682	$ 10,548	$ 9,433
Net income (loss)	203	609
Dividends, Common Stock	(147)	(151)
Stock Repurchased During Period, Value	(250)	(250)
Stock plans	(60)	(41)
Other	1	0
Other comprehensive income (loss), net of income taxes	(6)	0
Other comprehensive income (loss)	(6)	0
Common Shares
Shareholders' Equity Activity Summarization [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	2,661	2,662	2,662	2,663
Net income (loss)	0	0
Dividends, Common Stock	0	0
Stock Repurchased During Period, Value	0	0
Stock plans	(1)	(1)
Other	0	0
Other comprehensive income (loss)	0	0
Paid-in Capital in Excess of Par Value
Shareholders' Equity Activity Summarization [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	59	0	79	63
Net income (loss)	0	0
Dividends, Common Stock	0	0
Stock Repurchased During Period, Value	0	0
Stock plans	(20)	(63)
Other	0	0
Other comprehensive income (loss)	0	0
Treasury Stock, Common
Shareholders' Equity Activity Summarization [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	(6,383)	(5,682)	(6,214)	(5,540)
Net income (loss)	0	0
Dividends, Common Stock	0	0
Stock Repurchased During Period, Value	250	250
Stock plans	(81)	(108)
Other	0	0
Other comprehensive income (loss)	0	0
Retained Earnings
Shareholders' Equity Activity Summarization [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	14,389	12,988	14,332	12,536
Net income (loss)	204	606
Dividends, Common Stock	(147)	(151)
Stock Repurchased During Period, Value	0	0
Stock plans	0	(3)
Other	0	0
Other comprehensive income (loss)	0	0
Accumulated Other Comprehensive Income (Loss)
Shareholders' Equity Activity Summarization [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	(359)	(332)	(353)	(331)
Net income (loss)	0	0
Dividends, Common Stock	0	0
Stock Repurchased During Period, Value	0	0
Stock plans	0	0
Other	0	0
Other comprehensive income (loss)	(6)	(1)
Noncontrolling Interest in Consolidated Subsidiaries
Shareholders' Equity Activity Summarization [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	42	46	$ 42	$ 42
Net income (loss)	(1)	3
Cash dividends	0	0
Stock Repurchased During Period, Value	0	0
Stock plans	0	0
Other	1	0
Other comprehensive income (loss)	$ 0	$ 1