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INCOME TAXES - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Benefit from income taxes	$ (25)	$ (5)	$ 36	$ 133
Income tax benefit on ordinary loss			34	28
Income tax benefit for discrete items			2	105
Income tax benefit for legal settlements			54
Provision related to withholding tax, intercompany dividends			46
Tax provision (benefit) related to changes in uncertain tax positions			11	(10)
Tax benefit related to stock compensation			8	7
Provision related to filing certain tax returns			3	11
Tax benefit related to release of valuation allowance				63
Tax benefit related to change in law				$ 36
Valuation allowance against deferred tax assets	2,218		2,218		$ 2,252
Unrecognized tax benefits including interest and penalties	1,117		1,117		1,025
Unrecognized tax benefits related to interest and penalties	53		53		$ 49
Portion of unrecognized tax benefits, if recognized, would reduce the Company's effective tax rate	550		550
Unrecognized tax benefit, amount possible to decrease in next twelve months	$ 194		194
Estimate of possible loss, income tax examination (up to)			$ 2,100

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