COMMITMENTS AND GUARANTEES (Operating Leases) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset	$ 207	$ 232
Operating Lease, Cost	42	55
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months	50
Lessee, Operating Lease, Liability, Payments, Due Year Two	41
Lessee, Operating Lease, Liability, Payments, Due Year Three	36
Operating leases, future minimum payments due:
Operating Lease, Payments	$ 40	$ 43
Operating Lease, Weighted Average Discount Rate, Percent	5.40%	5.50%
Operating Lease, Weighted Average Remaining Lease Term	7 years 8 months 12 days	8 years 2 months 12 days
Lessee, Operating Lease, Liability, Payments, Due Year Four	$ 34
Lessee, Operating Lease, Liability, Payments, Due Year Five	29
Lessee, Operating Lease, Liability, Payments, Due after Year Five	97
Lessee, Operating Lease, Liability, Payments, Due	287
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	(59)
Operating Lease, Liability	228	$ 248
Operating Lease, Liability, Current	(38)	(44)
Operating Lease, Liability, Noncurrent	190	204
Variable and Short-term Lease, Cost	74	79
Lease, Cost	$ 116	$ 134	$ 80
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent	us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesNoncurrent	us-gaap:OtherLiabilitiesNoncurrent