EMPLOYEE STOCK BENEFIT PLANS (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Total stock-based compensation expense	$ 48	$ 63	$ 149	$ 176
Income tax benefit	16	20	50	58
Unrecognized compensation cost	380		$ 380
Weighted-average period over which unrecognized compensation cost is expected to be recognized			2 years 6 months
Restricted stock units [Member]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Total stock-based compensation expense	23	20	$ 66	62
Number of shares granted			2.2
Weighted average grant date fair value of grants during the period			$ 61.26
Market share units [Member]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Total stock-based compensation expense	9	9	$ 27	27
Number of shares granted			0.7
Weighted average grant date fair value of grants during the period			$ 65.26
Performance share units [Member]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Total stock-based compensation expense	$ 16	$ 34	$ 56	$ 87
Number of shares granted			1.1
Weighted average grant date fair value of grants during the period			$ 64.87