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Fair Value (Tables)
3 Months Ended
Jan. 31, 2022
Fair Value Disclosures [Abstract]  
Assets and Liabilities Measured and Recorded at Fair Value on a Recurring Basis The following table presents HP’s assets and liabilities that are measured at fair value on a recurring basis:
 As of January 31, 2022As of October 31, 2021
 Fair Value Measured UsingFair Value Measured Using
 Level 1Level 2Level 3TotalLevel 1Level 2Level 3Total
 In millions
Assets:        
Cash Equivalents:        
Corporate debt$— $1,047 $— $1,047 $— $1,112 $— $1,112 
Government debt(1)
927 — — 927 1,931 — — 1,931 
Available-for-Sale Investments:
Financial institution instruments— — — — 
Marketable equity securities and mutual funds
11 53 — 64 15 56 — 71 
Derivative Instruments:     
Interest rate contracts— 13 — 13 — — — — 
Foreign currency contracts— 477 — 477 — 277 — 277 
Other derivatives— — — — — — 
Total assets$938 $1,595 $— $2,533 $1,946 $1,455 $— $3,401 
Liabilities:        
Derivative Instruments:        
Interest rate contracts$— $29 $— $29 $— $24 $— $24 
Foreign currency contracts— 159 — 159 — 203 — 203 
Other derivatives— — — — — — 
Total liabilities$— $194 $— $194 $— $227 $— $227 

(1) Government debt includes instruments such as U.S. treasury notes, U.S. agency securities and non-U.S. government bonds. Money market funds invested in government debt and traded in active markets are included in Level 1.