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Guarantees, Indemnifications and Warranties (Tables)
12 Months Ended
Oct. 31, 2020
Guarantees and Product Warranties [Abstract]  
Changes in Aggregate Product Warranty Liabilities HP’s aggregate product warranty liabilities and changes were as follows:
 For the fiscal years ended October 31
 20202019
 In millions
Balance at beginning of year$922 $915 
Accruals for warranties issued977 1,051 
Adjustments related to pre-existing warranties (including changes in estimates)38 (3)
Settlements made (in cash or in kind)(944)(1,041)
Balance at end of year$993 $922