XML 54 R43.htm IDEA: XBRL DOCUMENT
v3.21.1

DISCONTINUED OPERATIONS (Details) - Bs. / $ | Mar. 31, 2021 | Sep. 30, 2020 | Mar. 31, 2020
--- | --- | --- | ---
Discontinued Operations and Disposal Groups [Abstract] |  |  |
Foreign exchange rate (in bolivars per dollar) | 10 |  |
DICOM floating rate (in bolivars per dollar) | 1,987,185 | 436,677 | 80,946

X
- Definition DICOM floating rate used by Venezuela. + References No definition available. + Details
Name: | hp_DicomFloatingRate
Namespace Prefix: | hp_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

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

X
- Definition Foreign exchange rate used to translate amounts denominated in functional currency to reporting currency. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6897108&loc=SL6897125-166521 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6450520&loc=d3e32618-110901 + Details
Name: | us-gaap_ForeignCurrencyExchangeRateTranslation1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant