LEASES - Components of Operating Lease Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating lease cost	$ 161	$ 165	$ 165
Short-term lease cost	1	4	10
Variable lease cost	8	8	7
Sublease income	(4)	(4)	(3)
Total	$ 166	$ 173	$ 179