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v3.21.2

Commitments (Details) |  | 1 Months Ended | 6 Months Ended | 14 Months Ended | 24 Months Ended
--- | --- | --- | --- | --- | ---
Jun. 01, 2021 USD ($) item | Dec. 31, 2017 | Jun. 30, 2021 USD ($) item | May 31, 2021 USD ($) | May 31, 2023 USD ($) item
Commitments |  |  |  |  |
Contract period for inventory purchase | 2 years | 2 years | 2 years |  |
Number of one year renewal options | item | 3 |  |  |  |
Period for options to extend contract period | 1 year |  |  |  |
Purchase commitment quantity | item |  |  | 19,813 |  |
Purchase commitment |  |  |  |  | $ 77,000,000
Purchase commitment amount purchased | $ 18,390,000 |  | $ 4,244,000 |  |
Minimum [Member] |  |  |  |  |
Commitments |  |  |  |  |
Purchase commitment quantity |  |  |  | 150,000 |
Purchase commitment |  |  |  | $ 11,104,000 |
Maximum [Member] |  |  |  |  |
Commitments |  |  |  |  |
Purchase commitment quantity |  |  |  | 245,900 |
Purchase commitment |  |  |  | $ 51,028,000 |
Subsequent Events [Member] |  |  |  |  |
Commitments |  |  |  |  |
Purchase commitment quantity | item |  |  |  |  | 600,000

X
- Definition Long-term Purchase Commitment, Amount Purchased + References No definition available. + Details
Name: | rba_LongTermPurchaseCommitmentAmountPurchased
Namespace Prefix: | rba_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Period covered by the long-term purchase commitment, for an option to extend in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | rba_LongTermPurchaseCommitmentPeriodOptionsToExtend
Namespace Prefix: | rba_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of one year renewal options. + References No definition available. + Details
Name: | rba_NumberOfOneYearRenewalOptions
Namespace Prefix: | rba_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition The minimum amount the entity agreed to spend under the long-term purchase commitment. + References No definition available. + Details
Name: | us-gaap_LongTermPurchaseCommitmentAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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_LongTermPurchaseCommitmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of units of goods that must be purchased within the specified time period of the agreement to avoid penalties or unfavorable effects on pricing, among other adverse consequences. + References No definition available. + Details
Name: | us-gaap_LongTermPurchaseCommitmentMinimumQuantityRequired
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Period covered by the long-term purchase commitment, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_LongtermPurchaseCommitmentPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |