Condensed Consolidated Statements of Equity - USD ($) $ in Millions	Total	Mandatory convertible preferred stock Mandatory convertible preferred stock	Common stock	Additional paid-in capital	Treasury stock	Retained earnings	Accumulated other comprehensive loss	Non- controlling interests
Beginning balance at Dec. 31, 2023	$ (17,228)		$ 5,061	$ 10,309	$ (49,549)	$ 27,251	$ (10,305)	$ 5
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss)/earnings	(7,968)					(7,952)		(16)
Other comprehensive income (loss), net of tax	32						32
Share-based compensation	310			310
Treasury shares issued for other share-based plans, net	(24)			(129)	105
Treasury shares issued for 401(k) contributions	1,315			435	880
Other changes in noncontrolling interests	1							1
Ending balance at Sep. 30, 2024	(23,562)		5,061	10,925	(48,564)	19,299	(10,273)	(10)
Beginning balance at Jun. 30, 2024	(17,982)		5,061	10,727	(48,841)	25,469	(10,392)	(6)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss)/earnings	(6,174)					(6,170)		(4)
Other comprehensive income (loss), net of tax	119						119
Share-based compensation	102			102
Treasury shares issued for other share-based plans, net	11			(7)	18
Treasury shares issued for 401(k) contributions	362			103	259
Ending balance at Sep. 30, 2024	(23,562)		5,061	10,925	(48,564)	19,299	(10,273)	(10)
Beginning balance at Dec. 31, 2024	(3,914)	6	5,061	18,964	(32,386)	15,362	(10,915)	(6)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss)/earnings	(5,982)					(5,985)		3
Other comprehensive income (loss), net of tax	371						371
Share-based compensation	343			343
Treasury shares issued for other share-based plans, net	17			(506)	523
Treasury shares issued for 401(k) contributions	1,173			419	754
Subsidiary shares purchased from noncontrolling interests	(2)			(2)
Cash dividends declared on Mandatory convertible preferred stock	(259)					(259)
Ending balance at Sep. 30, 2025	(8,253)	6	5,061	19,218	(31,109)	9,118	(10,544)	(3)
Beginning balance at Jun. 30, 2025	(3,296)	6	5,061	19,238	(31,603)	14,542	(10,539)	(1)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss)/earnings	(5,339)					(5,337)		(2)
Other comprehensive income (loss), net of tax	(5)						(5)
Share-based compensation	89			89
Treasury shares issued for other share-based plans, net	7			(278)	285
Treasury shares issued for 401(k) contributions	380			171	209
Subsidiary shares purchased from noncontrolling interests	(2)			(2)
Cash dividends declared on Mandatory convertible preferred stock	(87)					(87)
Ending balance at Sep. 30, 2025	$ (8,253)	$ 6	$ 5,061	$ 19,218	$ (31,109)	$ 9,118	$ (10,544)	$ (3)