RECEIVABLES PROVISION (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]
Balance at beginning of year	$ 412	$ 278	$ 252
SEC Schedule, 12-09, Valuation Allowances and Reserves, Business Acquired	0	116	0
Provision	5,839	3,687	2,739
Utilization	(5,601)	(3,667)	(2,707)
Other	13	(2)	(6)
Balance at end of year	663	412	278
Accounts Receivable, Credit Loss Expense (Reversal)	$ 12	$ 12	$ 4