RESTRUCTURING - Roll forward of the restructuring liability (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance		$ 173	$ 35
Delphi Technologies acquisition			75
Restructuring expense, net	$ 50	163	203	$ 72
Cash payments		(189)	(135)
Foreign currency translation adjustment and other		(8)	(5)
Restructuring reserve, ending balance	35	139	173	35
Less: Non-current restructuring liability		43
Current restructuring liability		96
Employee termination benefits
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance		160	34
Delphi Technologies acquisition			73
Restructuring expense, net		99	157
Cash payments		(128)	(113)
Foreign currency translation adjustment and other		(5)	9
Restructuring reserve, ending balance	34	126	160	34
Less: Non-current restructuring liability		41
Current restructuring liability		85
Other
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance		13	1
Delphi Technologies acquisition			2
Restructuring expense, net		64	46
Cash payments		(61)	(22)
Foreign currency translation adjustment and other		(3)	(14)
Restructuring reserve, ending balance	$ 1	13	$ 13	$ 1
Less: Non-current restructuring liability		2
Current restructuring liability		$ 11