INCOME TAXES (Unrecognized Tax Benefits) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Unrecognized tax benefits that would impact effective tax rate	$ 671	$ 668	$ 508
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at beginning of year	934	756	642
Gross additions to tax positions related to current year	52	106	74
Gross additions to tax positions related to prior years	56	218	108
Gross additions to tax positions assumed in acquisitions	1
Gross reductions to tax positions related to prior years	(34)	(57)	(87)
Settlements	(46)	(65)	26
Reductions to tax positions related to lapse of statute	(9)	(12)	(8)
Cumulative translation adjustment			1
Cumulative translation adjustment	(10)	(12)
Balance at end of year	944	934	756
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued [Abstract]
Accrued interest	93	96	83
Accrued penalties	16	17	34
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense [Abstract]
Interest expense	2	27	24
Penalty expense/(benefit)	1	$ (7)	$ 3
Minimum [Member]
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Estimated decrease in total amount of unrecognized tax benefits	270
Maximum [Member]
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Estimated decrease in total amount of unrecognized tax benefits	$ 330