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GOODWILL AND OTHER INTANGIBLES - Goodwill (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2021	Dec. 31, 2020
Goodwill [Roll Forward]
Gross goodwill balance, December 31, 2020	$ 3,129
Accumulated impairment losses, December 31, 2020		$ (502)
Net goodwill balance, December 31, 2020	3,325	2,627
Acquisition	707
Measurement period adjustments	23
Other, primarily translation adjustment	(32)
Ending balance, June 30, 2021	3,325
Air Management
Goodwill [Roll Forward]
Gross goodwill balance, December 31, 2020	1,517
Accumulated impairment losses, December 31, 2020		(502)
Net goodwill balance, December 31, 2020	1,711	1,015
Acquisition	707
Measurement period adjustments	0
Other, primarily translation adjustment	(11)
Ending balance, June 30, 2021	1,711
e-Propulsion & Drivetrain
Goodwill [Roll Forward]
Gross goodwill balance, December 31, 2020	1,313
Accumulated impairment losses, December 31, 2020		0
Net goodwill balance, December 31, 2020	1,303	1,313
Acquisition	0
Measurement period adjustments	12
Other, primarily translation adjustment	(22)
Ending balance, June 30, 2021	1,303
Aftermarket
Goodwill [Roll Forward]
Gross goodwill balance, December 31, 2020	299
Accumulated impairment losses, December 31, 2020		0
Net goodwill balance, December 31, 2020	311	$ 299
Acquisition	0
Measurement period adjustments	11
Other, primarily translation adjustment	1
Ending balance, June 30, 2021	$ 311

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