Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 25,817	$ 27,038
Foreign currency translation and other	386	(1,231)
Disposals	(5)	(62)
Goodwill, ending balance	26,751	25,817
Americas
Goodwill [Roll Forward]
Goodwill, beginning balance	9,136	9,087
Foreign currency translation and other	17	5
Disposals	0	0
Goodwill, ending balance	9,703	9,136
EMEA
Goodwill [Roll Forward]
Goodwill, beginning balance	9,492	10,278
Foreign currency translation and other	347	(773)
Disposals	(5)	(41)
Goodwill, ending balance	9,834	9,492
APAC
Goodwill [Roll Forward]
Goodwill, beginning balance	4,550	4,854
Foreign currency translation and other	(54)	(304)
Disposals	0	0
Goodwill, ending balance	4,499	4,550
Engineering
Goodwill [Roll Forward]
Goodwill, beginning balance	2,349	2,496
Foreign currency translation and other	73	(146)
Disposals	0	(1)
Goodwill, ending balance	2,422	2,349
Other
Goodwill [Roll Forward]
Goodwill, beginning balance	290	323
Foreign currency translation and other	3	(13)
Disposals	0	(20)
Goodwill, ending balance	293	290
2018 Non-Merger Related Acquisitions
Goodwill [Roll Forward]
Acquisitions (Note 2)	553	72
2018 Non-Merger Related Acquisitions | Americas
Goodwill [Roll Forward]
Acquisitions (Note 2)	550	44
2018 Non-Merger Related Acquisitions | EMEA
Goodwill [Roll Forward]
Acquisitions (Note 2)	0	28
2018 Non-Merger Related Acquisitions | APAC
Goodwill [Roll Forward]
Acquisitions (Note 2)	3	0
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