COMMITMENTS AND CONTINGENT LIABILITIES - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Loss Contingencies [Line Items]
Maturity period of majority of standby letters of credit	P2Y
Maturity period of Commercial letters of credit	P90D
Standby letters of credit
Loss Contingencies [Line Items]
Carrying amount of deferred revenue associated with guarantees	$ 8	$ 8
Outstanding standby letters of credit	570	$ 587
Maximum
Loss Contingencies [Line Items]
Aggregate range of reasonably possible losses current legal proceedings	20
Minimum
Loss Contingencies [Line Items]
Aggregate range of reasonably possible losses current legal proceedings	$ 0