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Supplementary Financial Information - Trade Receivables Sold and Cash Received (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Oct. 31, 2018 | Oct. 31, 2017 | Oct. 31, 2016
Receivables Sold but Not Collected from Third Party |  |  |
Balance at beginning of year | $ 147 | $ 149 | $ 93
Trade receivables sold | 10,224 | 9,553 | 8,222
Cash receipts | (10,202) | (9,562) | (8,160)
Foreign currency and other | (4) | 7 | (6)
Balance at end of year | $ 165 | $ 147 | $ 149

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 Receivables Sold but Not Collected from Third Party [Roll Forward] + References No definition available. + Details
Name: | hpq_ReceivablesSoldbutNotCollectedfromThirdPartyRollForward
Namespace Prefix: | hpq_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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