OTHER EXPENSE (INCOME), NET - Summary of Other Expense, Net (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Other Income and Expenses [Abstract]
Net gain on sale of assets	$ (1)	$ (10)
Acquired in-process research and development costs	1	1
Acquisition-related costs	0	8
Litigation and other matters	23	2
Other, net	0	(4)
Other expense, net	$ 23	$ (3)