Goodwill - Carrying Amount of Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 26,751	$ 25,817
Foreign currency translation and other	(1,018)	386
Disposals (Note 2)	(4)	(5)
Goodwill, ending balance	25,937	26,751
Americas
Goodwill [Roll Forward]
Goodwill, beginning balance	9,703	9,136
Foreign currency translation and other	(56)	17
Disposals (Note 2)	0	0
Goodwill, ending balance	9,838	9,703
EMEA
Goodwill [Roll Forward]
Goodwill, beginning balance	9,834	9,492
Foreign currency translation and other	(538)	347
Disposals (Note 2)	0	(5)
Goodwill, ending balance	9,296	9,834
APAC
Goodwill [Roll Forward]
Goodwill, beginning balance	4,499	4,550
Foreign currency translation and other	(253)	(54)
Disposals (Note 2)	(4)	0
Goodwill, ending balance	4,259	4,499
Engineering
Goodwill [Roll Forward]
Goodwill, beginning balance	2,422	2,349
Foreign currency translation and other	(150)	73
Disposals (Note 2)	0	0
Goodwill, ending balance	2,272	2,422
Other
Goodwill [Roll Forward]
Goodwill, beginning balance	293	290
Foreign currency translation and other	(21)	3
Disposals (Note 2)	0	0
Goodwill, ending balance	272	293
2018 Non-Merger Related Acquisitions
Goodwill [Roll Forward]
Acquisitions (Note 2)	208	553
2018 Non-Merger Related Acquisitions | Americas
Goodwill [Roll Forward]
Acquisitions (Note 2)	191	550
2018 Non-Merger Related Acquisitions | EMEA
Goodwill [Roll Forward]
Acquisitions (Note 2)	0	0
2018 Non-Merger Related Acquisitions | APAC
Goodwill [Roll Forward]
Acquisitions (Note 2)	17	3
2018 Non-Merger Related Acquisitions | Engineering
Goodwill [Roll Forward]
Acquisitions (Note 2)	0	0
2018 Non-Merger Related Acquisitions | Other
Goodwill [Roll Forward]
Acquisitions (Note 2)	$ 0	$ 0