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Basis of Presentation and Recently Issued Accounting Pronouncements - Revenue Earning Equipment (Details) | 12 Months Ended
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Dec. 31, 2017
Minimum |
Property Subject to or Available for Operating Lease [Line Items] |
Holding period for revenue earning equipment | 2 years

X
- Definition Property Subject to or Available for Operating Lease, Holding Period + References No definition available. + Details
Name: | hri_PropertySubjecttoorAvailableforOperatingLeaseHoldingPeriod
Namespace Prefix: | hri_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_PropertySubjectToOrAvailableForOperatingLeaseLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |