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GOODWILL AND OTHER INTANGIBLES - Goodwill (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 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	2,596	2,627
Measurement period adjustments	1
Other, primarily translation adjustment	(32)
Ending balance, March 31, 2021	2,596
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	998	1,015
Measurement period adjustments	(4)
Other, primarily translation adjustment	(13)
Ending balance, March 31, 2021	998
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	1,310	1,313
Measurement period adjustments	9
Other, primarily translation adjustment	(12)
Ending balance, March 31, 2021	1,310
Aftermarket
Goodwill [Roll Forward]
Gross goodwill balance, December 31, 2020	299
Accumulated impairment losses, December 31, 2020		0
Net goodwill balance, December 31, 2020	288	$ 299
Measurement period adjustments	(4)
Other, primarily translation adjustment	(7)
Ending balance, March 31, 2021	$ 288

X

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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Amount before accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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