RESTRUCTURING - Schedule of Restructuring Reserve Activity (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Restructuring Reserve [Roll Forward]
Beginning balance at January 1, 2023		$ 0
Restructuring charge	$ 780	781	$ 0	$ 0
Payments and utilization		(69)
Foreign exchange		0
Ending balance at December 31, 2023	712	712	0
Personnel costs
Restructuring Reserve [Roll Forward]
Beginning balance at January 1, 2023		0
Restructuring charge		687
Payments and utilization		0
Foreign exchange		0
Ending balance at December 31, 2023	687	687	0
Other
Restructuring Reserve [Roll Forward]
Beginning balance at January 1, 2023		0
Restructuring charge		94
Payments and utilization		(69)
Foreign exchange		0
Ending balance at December 31, 2023	$ 25	$ 25	$ 0