INCOME TAXES (Deferred Taxes and Valuation Allowance) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Components of Deferred Tax Assets [Abstract]
Foreign net operating loss carryforwards	$ 3,271	$ 2,480
State net operating loss and credit carryforwards	325	263
U.S. Federal net operating loss and credit carryforwards	435	88
Milestones payments and license fees	643	558
Other foreign deferred tax assets	307	370
Share-based compensation	389	521
Other	981	650
Total deferred tax assets	6,351	4,930
Valuation allowance	(2,809)	(2,844)
Total deferred tax assets, net	3,542	2,086
Components of Deferred Tax Liabilities [Abstract]
Acquired intangible assets	(6,612)	(7,387)
Goodwill and other	(1,176)	(643)
Deferred Tax Liabilities, Gross	(7,788)	(8,030)
Deferred Tax Liabilities, Net	(4,246)	(5,944)
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year	412	278	$ 252
Provision	5,839	3,687	2,739
Utilization	(5,601)	(3,667)	(2,707)
Foreign currency translation	13	(2)	(6)
Balance at end of year	663	412	278
Deferred Income Tax Liabilities, Net	(5,407)	(6,454)
Deferred Tax Assets, Net of Valuation Allowance, Noncurrent	1,161	510
SEC Schedule, 12-09, Valuation Allowance, Deferred Tax Asset [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year	2,844	3,193	2,827
Provision	62	75	458
Utilization	(488)	(423)	(43)
Foreign currency translation	212	(132)	(48)
Acquisitions	179	228	0
Non U.S. rate change	0	(97)	(1)
Balance at end of year	$ 2,809	$ 2,844	$ 3,193