XML 29 R44.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

DISCONTINUED OPERATIONS (Details) | Dec. 31, 2019 zero Bs. / $ | Sep. 30, 2018 Bs. / $
--- | --- | ---
Discontinued Operations and Disposal Groups [Abstract] |  |
Foreign exchange rate (in bolivars per dollar) |  | 10
Number of zeros eliminated from the old currency | zero | 5 |
DICOM floating rate (in bolivars per dollar) | 46,621 |

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
- Definition The number of zeros eliminated from the old currency. + References No definition available. + Details
Name: | hp_NumberOfZerosEliminatedFromOldCurrency
Namespace Prefix: | hp_
Data Type: | xbrli:integerItemType
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://fasb.org/us-gaap/role/ref/legacyRef -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 + Details
Name: | us-gaap_ForeignCurrencyExchangeRateTranslation1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant