EMPLOYEE STOCK BENEFIT PLANS (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Total stock-based compensation expense	$ 54	$ 59	$ 101	$ 113
Income tax benefit	19	20	34	38
Unrecognized compensation cost	454		$ 454
Weighted-average period over which unrecognized compensation cost is expected to be recognized			2 years 8 months 12 days
Restricted stock units [Member]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Total stock-based compensation expense	23	21	$ 43	42
Number of shares granted			2.1
Weighted average grant date fair value of grants during the period			$ 61.39
Market share units [Member]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Total stock-based compensation expense	9	9	$ 18	18
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	$ 22	$ 29	$ 40	$ 53
Number of shares granted			1.1
Weighted average grant date fair value of grants during the period			$ 64.87