STOCK-BASED COMPENSATION (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended					6 Months Ended
	Mar. 31, 2011 Employee [Member] Employees' Stock Purchase Plan [Member]	Mar. 31, 2011 Employee [Member] Unvested Stock Options [Member]	Mar. 31, 2011 Employee [Member] Deferred Stock Awards [Member]	Mar. 31, 2011 Employee [Member] Performance Deferred Stock Awards [Member]	Mar. 31, 2011 Director [Member] Restricted Stock Awards [Member]	Jun. 30, 2011 Employees' Stock Purchase Plan [Member] years	Jun. 30, 2011 Unvested Stock Options [Member] years	Jun. 30, 2011 Deferred Stock Awards [Member] years	Jun. 30, 2011 Performance Deferred Stock Awards [Member] years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Right to purchase shares subscribed by employees	10,800,000
Weighted-average exercise price right to purchase shares by employees	$ 23.00
Weighted-average fair value of shares under the Employee Stock Purchase Plan	$ 11.39
Stock options granted to employees under the 1988 plan		10,500,000
Weighted-average exercise price options granted under the 1988 plan		$ 38.38
Weighted-average fair value per share of purchase rights granted		$ 10.67
Deferred stock granted to employees under the 1988 plan			3,000,000	1,100,000
Restricted stock granted to non-employee directors					31,350
Weighted-average fair value of deferred stock granted under the 1988 plan			$ 38.35	$ 48.94	$ 37.26
Weighted-average Recognition Period, in years						0.38	0.78	0.83	0.46
Unrecognized Compensation Cost						$ 25	$ 89	$ 138	$ 45