INCOME TAXES (Unrecognized Tax Benefits) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at beginning of year	$ 756	$ 642	$ 628
Gross additions to tax positions related to current year	106	74	46
Gross additions to tax positions related to prior years	218	108	66
Gross additions to tax positions assumed in acquisitions			31
Gross reductions to tax positions related to prior years	(57)	(87)	(57)
Settlements	(65)	26	(54)
Reductions to tax positions related to lapse of statute	(12)	(8)	(19)
Cumulative translation adjustment		1	1
Cumulative translation adjustment	(12)
Balance at end of year	934	756	642
Unrecognized tax benefits that would impact effective tax rate	668	508	633
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	236
Minimum estimated decrease in total amount of unrecognized tax benefits	310
Maximum estimated decrease in total amount of unrecognized tax benefits	370
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued [Abstract]
Accrued interest	96	83	59
Accrued penalties	17	34	32
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense [Abstract]
Interest expense	27	24	14
Penalty expense/(benefit)	$ (7)	$ 3	$ 16