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Comprehensive Loss (Tables)
6 Months Ended
Sep. 30, 2011
Comprehensive Loss [Abstract] 
Comprehensive Loss
  Three Months Ended
September 30,
Six Months Ended
September 30,
 
  2011 2010 2011 2010
Net loss $ (340 ) $ (201 ) $ (119 ) $ (105 )
Other comprehensive income (loss):                        
Change in unrealized gains (losses) on available-for-sale securities   42     40     55     (49 )
Reclassification adjustment for realized gains on available-for-sale securities   (1 )   (32 )   (1 )   (27 )
Change in unrealized losses on derivative instruments   (1 )   (5 )   (1 )   (6 )
Reclassification adjustment for realized losses on derivative instruments   -     -     2     1  
Foreign currency translation adjustments   (22 )   28     (16 )   (3 )
 
Total other comprehensive income (loss)   18     31     39     (84 )
 
Total comprehensive loss $ (322 ) $ (170 ) $ (80 ) $ (189 )