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Supplementary Financial Information - Schedule of Transferred Trade Receivables Not Collected from Third Parties (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Apr. 30, 2021 | Apr. 30, 2020 | Apr. 30, 2021 | Apr. 30, 2020
Trade Receivables Sold and Cash Received [Roll Forward] |  |  |  |
Balance at beginning of period | $ 207 | $ 88 | $ 188 | $ 235
Trade receivables sold | 2,947 | 2,323 | 6,489 | 5,181
Cash receipts | (2,940) | (2,286) | (6,472) | (5,291)
Foreign currency and other | (2) | (1) | 7 | (1)
Balance at end of period | $ 212 | $ 124 | $ 212 | $ 124

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