INCOME TAXES (Effective Income Tax Rate Reconciliation and Income Tax Contingencies) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Reconciliation of effective income tax rate and amount computed using expected U.S. statutory federal rate
Income tax expense at U.S. federal statutory rate	$ 1,251	$ 1,015	$ 1,539
Adjustment due to:
Foreign rate differential	210	210	(458)
Innovation Box Tax benefit	(443)	(435)	(397)
Tax Act - Remeasurement of deferred tax balances	0	2	217
Tax Act - U.S. transition tax and other transition impacts	(17)	(46)	1,563
Other	92	95	28
Income tax expense	1,093	837	2,058
Unrecognized tax benefits
Unrecognized tax benefit — January 1	45	32	33
Gross increases — tax positions in current period	3	1	5
Gross increases — tax positions in prior periods	11	19	5
Gross decreases — tax positions in prior periods	(3)	(3)	(9)
Reduction due to lapse in statute of limitations	0	(2)	(1)
Reduction due to settlements during the current period	0	(2)	(1)
Unrecognized tax benefit — December 31	$ 56	$ 45	$ 32