INCOME TAXES (Unrecognized Tax Benefits) (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at beginning of year	$ 995	$ 1,155	$ 995
Gross additions to tax positions related to current year	170	48	173
Gross additions to tax positions related to prior years	19	21	30
Gross additions to tax positions assumed in acquisitions	852	0	0
Gross reductions to tax positions related to prior years	(35)	(106)	(22)
Settlements	(23)		(20)
Settlements		2
Reductions to tax positions related to lapse of statute	(72)	(119)	(13)
Cumulative translation adjustment	(1)	(6)
Cumulative translation adjustment			12
Balance at end of year	1,905	995	1,155
Income Tax Uncertainties [Abstract]
Unrecognized tax benefits that would impact effective tax rate	1,809	853	1,002
Accrued interest	292	167	148
Accrued penalties	$ 10	$ 11	$ 15

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount of unrecognized tax benefits.

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Amount of decrease in unrecognized tax benefits resulting from foreign currency translation.

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Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities.

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Amount of statutory penalties accrued for a tax position claimed or expected to be claimed by the entity, in its tax return.

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Amount of increase in unrecognized tax benefits resulting from acquisitions.

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Amount of interest expense accrued for an underpayment of income taxes.

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Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

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