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OTHER OPERATING EXPENSE, NET - Narrative (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($) employee	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($) employee
Schedule of Equity Method Investments
Merger, acquisition and divestiture expense	$ 15	$ 21	$ 28	$ 42
Loss on sale	7	0	7	0
Gain on business insurance recovery	$ 0	$ 6	$ 2	$ 6
Europe | Facility Closure
Schedule of Equity Method Investments
Number of properties | employee		2		2
Air Management
Schedule of Equity Method Investments
Impairment of assets to be disposed		$ 9		$ 9
e-Propulsion & Drivetrain
Schedule of Equity Method Investments
Impairment of assets to be disposed		$ 8		$ 8

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