RETIREMENT-RELATED BENEFITS - Changes in Benefit Obligation and Plan Assets (Details) - Defined Benefit Pension Plans - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2023	Dec. 31, 2021
Changes in benefit obligation
Benefit obligation, at beginning of period	$ 2,302	$ 2,024	$ 1,202
Service cost	14	44	10
Interest cost	6	32	4
Plan participants' contributions	1	4	1
Benefit obligation assumed from former Parent			1,178
Actuarial losses (gains)	(224)	(299)	(43)
Benefits paid from trust	(4)	(15)	(2)
Direct benefit payments	(11)	(37)	(3)
Foreign exchange impact	(50)	(66)	(34)
Amendments, curtailments, settlements and other	(11)	(29)	(11)
Benefit obligation, at end of period	2,024	1,659	2,302
Change in plan assets
Fair value of plan assets, at beginning of period	1,496	1,383	654
Actual return on plan assets	(71)	(88)	39
Employer contributions	2	27	23
Fair value of plan assets assumed from former Parent			810
Plan participant's contributions	1	4	1
Benefits paid from trust	(4)	(15)	(2)
Foreign exchange impact	(34)	(40)	(22)
Settlements	(7)	(44)	(8)
Fair value of plan assets, at end of period	1,383	1,226	1,496
Funded Status at end of period	(641)	(433)	(807)
Accumulated benefit obligation	$ 1,907	$ 1,574	$ 2,181