SUPPLEMENTAL FINANCIAL INFORMATION - Allowance for Doubtful Accounts (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Allowance for Doubtful Accounts Receivable [Roll Forward]
Balance at beginning of period	$ 129	$ 120	$ 122	$ 125
Charged to costs and expenses	3	(4)	9	(3)
Write-offs	(1)	(1)	(2)	(1)
Currency translation adjustments	(6)	2	(4)	(4)
Balance at end of period	$ 125	$ 117	$ 125	$ 117