REVENUE FROM CONTRACTS WITH CUSTOMERS - Disaggregation of revenue (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenue from External Customer [Line Items]
Net sales	$ 10,165	$ 10,168	$ 10,530
Air Management | Reportable Geographical Components
Revenue from External Customer [Line Items]
Net sales	5,598	6,153	6,390
e-Propulsion & Drivetrain | Reportable Geographical Components
Revenue from External Customer [Line Items]
Net sales	3,940	4,015	4,140
Fuel Injection | Reportable Geographical Components
Revenue from External Customer [Line Items]
Net sales	435	0	0
Aftermarket | Reportable Geographical Components
Revenue from External Customer [Line Items]
Net sales	192	0	0
North America
Revenue from External Customer [Line Items]
Net sales	3,057	3,375	3,372
North America | Air Management
Revenue from External Customer [Line Items]
Net sales	1,425	1,584	1,573
North America | e-Propulsion & Drivetrain
Revenue from External Customer [Line Items]
Net sales	1,559	1,791	1,799
North America | Fuel Injection
Revenue from External Customer [Line Items]
Net sales	0	0	0
North America | Aftermarket
Revenue from External Customer [Line Items]
Net sales	73	0	0
Europe
Revenue from External Customer [Line Items]
Net sales	3,559	3,810	4,022
Europe | Air Management
Revenue from External Customer [Line Items]
Net sales	2,482	2,980	3,074
Europe | e-Propulsion & Drivetrain
Revenue from External Customer [Line Items]
Net sales	733	830	948
Europe | Fuel Injection
Revenue from External Customer [Line Items]
Net sales	253	0	0
Europe | Aftermarket
Revenue from External Customer [Line Items]
Net sales	91	0	0
Asia
Revenue from External Customer [Line Items]
Net sales	3,411	2,833	2,983
Asia | Air Management
Revenue from External Customer [Line Items]
Net sales	1,596	1,468	1,621
Asia | e-Propulsion & Drivetrain
Revenue from External Customer [Line Items]
Net sales	1,631	1,365	1,362
Asia | Fuel Injection
Revenue from External Customer [Line Items]
Net sales	169	0	0
Asia | Aftermarket
Revenue from External Customer [Line Items]
Net sales	15	0	0
Other
Revenue from External Customer [Line Items]
Net sales	138	150	153
Other | Air Management
Revenue from External Customer [Line Items]
Net sales	95	121	122
Other | e-Propulsion & Drivetrain
Revenue from External Customer [Line Items]
Net sales	17	29	31
Other | Fuel Injection
Revenue from External Customer [Line Items]
Net sales	13	0	0
Other | Aftermarket
Revenue from External Customer [Line Items]
Net sales	$ 13	$ 0	$ 0