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Supplementary Financial Information - Schedule of Transferred Trade Receivables Not Collected from Third Parties (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Jan. 31, 2019 | Jan. 31, 2018
Trade Receivables Sold and Cash Received Roll Forward |  |
Balance at beginning of period | $ 165 | $ 147
Trade receivables sold | 3,036 | 2,936
Cash receipts | (3,010) | (2,921)
Foreign currency and other | 3 | 10
Balance at end of period | $ 194 | $ 172

X
- Definition The aggregate amount of cash receipts under revolving financing receivables arrangements facilities during the reporting period. + References No definition available. + Details
Name: | hpq_CashReceipts
Namespace Prefix: | hpq_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The aggregate amount of FX and other under revolving financing receivables arrangements facilities during the reporting period. + References No definition available. + Details
Name: | hpq_FxAndOther
Namespace Prefix: | hpq_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the amount of receivables sold to the third party, but not collected by the third party from customer under revolving financing receivables arrangements. + References No definition available. + Details
Name: | hpq_ReceivablesSoldButNotCollectedFromThirdParty
Namespace Prefix: | hpq_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The aggregate face amount of accounts receivable that were sold to third party under revolving financing receivables arrangements during the reporting period. + References No definition available. + Details
Name: | hpq_TradeReceivablesSold
Namespace Prefix: | hpq_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | hpq_TradeReceivablesSoldAndCashReceivedRollForward
Namespace Prefix: | hpq_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration