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Derivatives (Tables)
12 Months Ended
Mar. 31, 2012
Derivatives [Abstract]  
Effect of interest rate and foreign exchange derivatives on Consolidated Statements of Operations
                         
   

AMOUNT OF NET (GAIN)/LOSS RECOGNIZED IN THE

CONSOLIDATED STATEMENTS OF OPERATIONS

 

LOCATION OF AMOUNTS RECOGNIZED

(in millions)

  YEAR ENDED MARCH 31, 2012     YEAR ENDED MARCH 31, 2011     YEAR ENDED MARCH 31, 2010  

Interest expense, net — interest rate swaps designated as cash flow hedges

  $     $ 4     $ 6  

Interest expense, net — interest rate swaps designated as fair value hedges

  $ (12   $ (12   $ (1

Other expenses (gains), net — foreign currency contracts

  $ (3   $ 14     $ 20