FAIR VALUE MEASUREMENTS - Reconciliation of level 3 defined benefit plan assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Insurance contract
Change in plan assets:
Fair value of plan assets, January 1	$ 113	$ 110
Delphi Technologies acquisition		0
Purchases, sales and settlements	0	0
Realized gains	0	0
Benefits paid	(4)	(6)
Unrealized gains (losses) on assets still held at the reporting date	1	6
Translation adjustment	(2)	3
Fair value of plan assets, December 31	108	113
Real estate trust fund
Change in plan assets:
Fair value of plan assets, January 1	86	0
Delphi Technologies acquisition		82
Purchases, sales and settlements	36	0
Realized gains	0	0
Benefits paid	0	0
Unrealized gains (losses) on assets still held at the reporting date	7	(2)
Translation adjustment	(2)	6
Fair value of plan assets, December 31	127	86
Hedge funds
Change in plan assets:
Fair value of plan assets, January 1	0	0
Delphi Technologies acquisition		103
Purchases, sales and settlements	0	(114)
Realized gains	0	3
Benefits paid	0	0
Unrealized gains (losses) on assets still held at the reporting date	0	0
Translation adjustment	0	8
Fair value of plan assets, December 31	$ 0	$ 0