OTHER EXPENSE, NET - Summary of Other Expense, Net (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Other Income and Expenses [Abstract]
Net loss (gain) on sale of assets	$ 0	$ 1	$ (1)	$ (9)
Acquired in-process research and development costs	7	7	8	8
Acquisition-related costs	0	0	0	8
Litigation and other matters	100	1	123	3
Other, net	0	(1)	0	(5)
Other expense, net	$ 107	$ 8	$ 130	$ 5