Warranties (Tables)
 6 Months Ended
Apr. 30, 2011
Warranties [Abstract]  
Summary of standard warranty accrual activity
A summary of the standard warranty accrual activity is shown in the table below:
 
 
 
FY 2011
  
FY 2010
 
 
 
(in millions)
 
Beginning balance as of November 1,
 $45  $28 
Accruals for warranties issued during the period
  33   26 
Changes in estimates
  3   (2)
Settlements made during the period
  (32)  (24)
Ending balance as of April 30,
 $49  $28