Fair Value Measurements (Tables)
 3 Months Ended
Apr. 30, 2011
Fair Value Disclosure [Abstract]  
Assets and liabilities measured at fair value on a recurring basis
Assets and liabilities measured at fair value on a recurring basis as of April 30, 2011 were as follows:
 
 
 
 
  
Fair Value Measurement at April 30, 2011 Using
 
 
 
April 30,
2011
  
Quoted Prices
in Active
Markets for
Identical Assets
(Level 1)
  
Significant
Other
Observable
Inputs
(Level 2)
  
Significant
Unobservable
Inputs
(Level 3)
 
 
 
(in millions)
 
Assets:
 
 
  
 
  
 
  
 
 
Short-term
 
 
  
 
  
 
  
 
 
Cash equivalents (money market funds)
 $1,388  $1,388  $-  $- 
Derivative instruments (foreign exchange contracts)
  41   -   41   - 
Long-term
                
Trading securities
  52   52   -   - 
Derivative instruments (interest rate contracts)
  26   -   26   - 
Available-for-sale investments
  2   2   -   - 
Total assets measured at fair value
 $1,509  $1,442  $67  $- 
 
                
Liabilities:
                
Short-term
                
Derivative instruments (foreign exchange contracts)
 $25  $-  $25  $- 
Long-term
                
Derivative instruments (interest rate contracts)
  9   -   9   - 
Deferred compensation liability
  50   -   50   - 
Total liabilities measured at fair value
 $84  $-  $84  $- 
 
Significant unobservable input (level 3) reconciliation
For assets measured at fair value using significant unobservable inputs (level 3), the following table summarizes the change in balances during the three and six months ended April 30, 2011 and  2010:
 
 
 
Three Months Ended
April 30,
  
Six Months Ended
April 30,
 
 
 
2011
  
2010
  
2011
  
2010
 
 
 
(in millions)
 
Balance, beginning of period
 $-  $3  $-  $6 
Realized losses related to amortization of premium
  -   (1)  -   (1)
Realized losses related to investment impairments
  -   -   -   - 
Sales
  -   -   -   (2)
Transfers into level 3
  -   -   -   - 
Transfers out of level 3
  -   (1)  -   (2)
Balance, end of period
 $-  $1  $-  $1 
Total losses included in net income attributable to change in unrealized losses relating to assets still held at the reporting date, reported in interest and other income, net
 $-  $(1) $-  $(1)
 
Impairment of Long-lived assets included in net income
For assets measured at fair value on a non-recurring basis, the following table summarizes the impairments included in net income during the three and six months ended April 30, 2011 and 2010:
 
 
 
Three Months Ended
April 30,
  
Six Months Ended
April 30,
 
 
 
2011
  
2010
  
2011
  
2010
 
 
 
(in millions)
 
Long-lived assets held and used
 $4  $1  $4  $6 
Long-lived assets held for sale
 $1  $-  $1  $14