STOCK-BASED COMPENSATION (Employees' Stock Purchase Plan) (Details) $ / shares in Units, shares in Thousands, $ in Millions		12 Months Ended
		Dec. 31, 2015 USD ($) $ / shares shares	Dec. 31, 2014 USD ($) $ / shares shares	Dec. 31, 2013 USD ($) $ / shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Outstanding, shares, beginning balance | shares		16
Outstanding, shares, ending balance | shares		7	16
Employees' Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Employee Subscription Rate		10.00%
Plan price of the stock is set a no less than the following percentage of market price		85.00%
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Outstanding Weighted Average Exercise Price | $ / shares	[1]	41.49	38.13
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Granted, shares | shares		3,183
Granted, exercise price | $ / shares	[1]	41.49
Exercised, shares | shares		(3,148)
Exercised, exercise price | $ / shares	[1]	41.48
Forfeited/Expired, shares | shares		(44)
Forfeited/Expired, exercise price | $ / shares	[1]	40.69
Weighted-average fair value per share of purchase rights granted | $ / shares		$ 4.62	$ 5.45	$ 7.20
Total Compensation Expense | $		$ 15	$ 20	$ 60
Stock-based compensation expense related tax benefit | $		5	7	22
Total amount of cash received from the exercise of purchase rights | $		131	138	198
Total intrinsic value of purchase rights exercised | $	[2]	25	42	68
Total intrinsic value of purchase rights exercised, related tax benefit | $		$ 9	$ 15	$ 25

[1] Weighted average price per share

[2] Difference between the market price at exercise and the price paid by the employee to exercise the purchase rights.