ACQUISITIONS AND DISPOSITIONS - Narrative (Details) € in Millions, ¥ in Millions, SFr in Millions, $ in Millions									12 Months Ended
	Jul. 03, 2023	Mar. 01, 2023 USD ($)	Mar. 01, 2023 CNY (¥)	Dec. 01, 2022 USD ($)	Dec. 01, 2022 CHF (SFr)	Jul. 29, 2022 USD ($)	Mar. 31, 2022 USD ($)	Mar. 31, 2022 CNY (¥)	Dec. 31, 2024 USD ($)	Dec. 31, 2024 CNY (¥)	Dec. 31, 2023 USD ($)	Dec. 31, 2023 CNY (¥)	Dec. 31, 2022 USD ($)	Dec. 31, 2022 CNY (¥)	Dec. 31, 2021 USD ($)	Dec. 31, 2024 CNY (¥)	Dec. 31, 2024 CHF (SFr)	Dec. 01, 2023 USD ($)	Dec. 01, 2023 EUR (€)	Jun. 30, 2023 USD ($)	Jun. 30, 2023 CNY (¥)	Mar. 01, 2023 CNY (¥)	Dec. 01, 2022 CHF (SFr)	Mar. 31, 2022 CNY (¥)	Sep. 30, 2019 USD ($)	May 31, 2019 USD ($)
Business Acquisition [Line Items]
Distribution of outstanding common stock percentage	100.00%
Conversion ratio, outstanding common stock distributed	0.2
Payments to acquire businesses, net of cash acquired									$ 0		$ 109		$ 312
Goodwill									2,357		3,013		2,978
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Water Valley
Business Acquisition [Line Items]
Disposal group, consideration															$ 57
Payments to acquire businesses, net of cash acquired															39
Potential earn out payments															30
Estimated payout									5						$ 18
Estimate of expected earn-out, loss											5		9
Final settlement											14
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Water Valley | Promissory note
Business Acquisition [Line Items]
Estimated payout									10
Corporate Joint Venture | BorgWarner Romeo Power LLC
Business Acquisition [Line Items]
Noncontrolling interest																									60.00%
Romeo Power Inc.
Business Acquisition [Line Items]
Ownership interest equity interest																										20.00%
Unrealized and realized loss on equity and debt securities													(39)
BorgWarner Romeo Power LLC | Corporate Joint Venture
Business Acquisition [Line Items]
Equity securities without readily determinable fair value																									$ 10
Gain on sale of investments													22
Eldor Corporation’s Electric Hybrid Systems Business
Business Acquisition [Line Items]
Estimated earn-out payments																		$ 78	€ 72
Contractual earn-out payments																		191	€ 175
Estimated fair values of assets acquired and liabilities assumed, assets																		86
Business combination, recognized Identifiable assets acquired and liabilities assumed, intangible assets including goodwill																		27
Estimated fair values of assets acquired and liabilities assumed, liabilities																		8
Goodwill																		$ 20
Eldor Corporation’s Electric Hybrid Systems Business | Developed technology
Business Acquisition [Line Items]
Estimated Life (in years)																		6 years	6 years
Hubei Surpass Sun Electric Charging Business Member
Business Acquisition [Line Items]
Contractual earn-out payments		$ 15																				¥ 103
Estimated fair values of assets acquired and liabilities assumed, assets		50
Business combination, recognized Identifiable assets acquired and liabilities assumed, intangible assets including goodwill		5
Estimated fair values of assets acquired and liabilities assumed, liabilities		$ 8																$ 7
Business acquisition, percentage of voting interests acquired		100.00%																				100.00%
Consideration transferred		$ 42	¥ 288
Base purchase price		39	268
Payments to acquire businesses									4	¥ 25	$ 31	¥ 217
Business combination, remaining consideration payable		4	¥ 26
Goodwill		$ 2
Hubei Surpass Sun Electric Charging Business Member | Other current liabilities
Business Acquisition [Line Items]
Business combination, consideration payable in next two years									3							¥ 20
Business combination, consideration payable in next three months									1							¥ 6
Hubei Surpass Sun Electric Charging Business Member | Developed technology
Business Acquisition [Line Items]
Estimated Life (in years)		5 years																				5 years
Drivetek AG
Business Acquisition [Line Items]
Estimated earn-out payments									6								SFr 5
Contractual earn-out payments				$ 10																			SFr 10
Business acquisition, percentage of voting interests acquired				100.00%																			100.00%
Payments to acquire businesses				$ 29	SFr 27
Retention payment payable period				3 years																			3 years
Other non-current liability									6								5
Drivetek AG | Other current liabilities
Business Acquisition [Line Items]
Other non-current liability									3								2
Drivetek AG | Other non-current liabilities
Business Acquisition [Line Items]
Other non-current liability									$ 3								SFr 3
Rhombus Energy Solutions
Business Acquisition [Line Items]
Contractual earn-out payments						$ 30
Business acquisition, percentage of voting interests acquired						100.00%
Payments to acquire businesses						$ 131
Rhombus Energy Solutions | Employee Retention Payment
Business Acquisition [Line Items]
Contractual earn-out payments						$ 25
Retention payment payable period						3 years
Santoll Automotive Components
Business Acquisition [Line Items]
Estimated earn-out payments							$ 40													$ 24				¥ 250
Contractual earn-out payments							$ 47																	¥ 300
Business acquisition, percentage of voting interests acquired							100.00%																	100.00%
Consideration transferred							$ 192
Base purchase price							$ 152	¥ 1,000
Payments to acquire businesses													157
Post-closing adjustments through reduction of payment													5
Romeo Power Inc.
Business Acquisition [Line Items]
Equity securities without readily determinable fair value																										$ 50
Romeo Power Inc. | Romeo Power Inc.
Business Acquisition [Line Items]
Equity securities, FV-NI													$ 31
Santroll Automotive Components
Business Acquisition [Line Items]
Estimated earn-out payments | ¥																					¥ 200
Payments to acquire businesses | ¥														¥ 1,000