STOCK-BASED COMPENSATION (Details) (USD $) In Millions, except Share data, unless otherwise specified	9 Months Ended				3 Months Ended
	Sep. 30, 2012 Employees' Stock Purchase Plan [Member] years	Sep. 30, 2012 Stock Option [Member] years	Sep. 30, 2012 Deferred Stock Awards [Member] years	Sep. 30, 2012 Performance Deferred Stock Awards [Member] years	Mar. 31, 2012 Employee [Member] Employees' Stock Purchase Plan [Member]	Mar. 31, 2012 Employee [Member] Stock Option [Member]	Mar. 31, 2012 Employee [Member] Deferred Stock Awards [Member]	Sep. 30, 2012 Employee [Member] Deferred Shares 2012 Stock Incentive Plan [Member]	Mar. 31, 2012 Employee [Member] Performance Deferred Stock Awards [Member]	Mar. 31, 2012 Director [Member] Restricted Stock Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Right to purchase shares subscribed by employees					9,500,000
Weighted-average exercise price right to purchase shares by employees					$ 25.42
Weighted-average fair value of shares under the Employee Stock Purchase Plan					$ 8.32
Stock options granted to employees under the 1988 plan						12,800,000
Weighted-average exercise price options granted under the 1988 plan						$ 34.00
Weighted-average fair value per share of purchase rights granted						$ 9.38
Deferred stock granted to employees							3,500,000	159,935	1,200,000
Restricted stock granted to non-employee directors										34,650
Weighted-average fair value of deferred stock granted under the 1988 plan							$ 34.02		$ 43.52	$ 33.69
Weighted-average Recognition Period, in years	0.13	0.76	0.79	0.57
Unrecognized Compensation Cost	$ 7	$ 81	$ 106	$ 22