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FINANCIAL INSTRUMENTS (Narrative) (Details) (USD $)
In Millions
3 Months Ended
Jun. 30, 2010
Jun. 30, 2011
Mar. 31, 2011
Mar. 31, 2010
Cash and cash equivalents $ 1,057 $ 1,173 $ 1,579 [1] $ 1,273
Proceeds from sale of marketable equity securities 8      
The9 [Member]
       
Total impairments of marketable securities 2      
Proceeds from sale of marketable equity securities 8      
Gain/(loss) on sale of marketable equity securities $ (3)      
[1] Derived from audited consolidated financial statements.