REPORTING SEGMENTS AND RELATED INFORMATION - Adjusted Operating Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Adjusted Operating Income	$ 1,892	$ 1,921	$ 1,233
Corporate, including stock-based compensation	289	302	192
Intangible asset amortization expense	97	88	89
Restructuring expense	59	163	203
Merger, acquisition and divestiture expense, net	40	50	96
Asset impairments and lease modifications	30	17	17
(Gain) loss on sales of businesses	(13)	29	0
Other non-comparable items	16	(3)	(9)
Customer warranty settlement	0	124	0
Amortization of inventory fair value adjustment	0	0	27
Equity in affiliates’ earnings, net of tax	(38)	(48)	(18)
Unrealized loss (gain) on debt and equity securities	(73)	(362)	382
Interest expense, net	52	93	61
Other postretirement income	(31)	(45)	(7)
Earnings before income taxes and noncontrolling interest	1,318	789	964
Provision for income taxes	292	150	397
Net earnings	1,026	639	567
Net earnings attributable to the noncontrolling interest, net of tax	82	102	67
Net earnings attributable to BorgWarner Inc.	944	537	500
Air Management
Segment Reporting Information [Line Items]
Adjusted Operating Income	1,068	1,064	762
e-Propulsion & Drivetrain
Segment Reporting Information [Line Items]
Adjusted Operating Income	379	458	368
(Gain) loss on sales of businesses		7
Fuel Systems
Segment Reporting Information [Line Items]
Adjusted Operating Income	249	235	49
Aftermarket
Segment Reporting Information [Line Items]
Adjusted Operating Income	$ 196	$ 164	$ 54