EMPLOYEE STOCK BENEFIT PLANS (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Total stock-based compensation expense	$ 59	$ 50	$ 113	$ 99
Income tax benefit	20	17	38	33
Unrecognized compensation cost	419		$ 419
Weighted-average period over which unrecognized compensation cost is expected to be recognized			2 years 7 months 6 days
Restricted Stock [Member]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Total stock-based compensation expense	21	19	$ 42	38
Number of shares granted			1.6
Weighted average grant date fair value of grants during the period			$ 61.28
Share-based compensation arrangement by share-based payment award, award vesting period			4 years
Market share units [Member]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Total stock-based compensation expense	9	8	$ 18	17
Number of shares granted			0.7
Weighted average grant date fair value of grants during the period			$ 67.03
Share-based compensation arrangement by share-based payment award, award vesting period			4 years
Performance share units [Member]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Total stock-based compensation expense	$ 29	$ 23	$ 53	$ 44
Number of shares granted			1.6
Weighted average grant date fair value of grants during the period			$ 65.07
Share-based compensation arrangement by share-based payment award, award vesting period			3 years