STOCK-BASED COMPENSATION (Employees' Stock Purchase Plan) (Details) (Employees' Stock Purchase Plan [Member], USD $) In Millions, except Share data in Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2009
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, Nonvested [Roll Forward]
Granted, shares	10,831
Granted, exercise price	$ 23.00	[1]
Exercised, shares	(8,564)
Exercised, exercise price	$ 23.00	[1]
Forfeited/Expired, shares	(2,267)
Forfeited/Expired, exercise price	$ 23.00	[1]
Weighted-average fair value per share of purchase rights granted	$ 11.39		$ 11.90		$ 1.00
Total compensation expense	$ 123		$ 164		$ 10
Stock-based compensation expense related tax benefit	46		61		4
Total amount of cash received from the exercise of purchase rights	197		224		137
Total intrinsic value of purchase rights exercised	98	[2]	147	[2]	38	[2]
Total intrinsic value of purchase rights exercised, related tax benefit	$ 36		$ 54		$ 14

[1] Weighted-average per share

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