INCOME TAX 5 (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at beginning of year	$ 1,164	$ 1,089	$ 947
Gross increases related to current period tax positions	94	51	370
Gross increases related to prior periods tax positions	68	83	82
Gross decreases related to prior periods tax positions	(256)	(34)	(201)
Decrease related to resolutions of audits with tax authorities	(35)	(3)	(40)
Expiration of the statue of limitations for the assessment of taxes	(76)	(13)	(50)
Foreign currency translation	32	(9)	(19)
Balance at end of year	$ 991	$ 1,164	$ 1,089