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v3.20.4

Significant Accounting Policies (Depreciation of Assets Based on Usage) (Details) | 12 Months Ended
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Dec. 31, 2020
Land Improvements [Member] |
Property, Plant and Equipment [Line Items] |
Depreciation rate | 10.00%
Buildings [Member] | Minimum [Member] |
Property, Plant and Equipment [Line Items] |
Fixed assets useful life | 15 years
Buildings [Member] | Maximum [Member] |
Property, Plant and Equipment [Line Items] |
Fixed assets useful life | 30 years
Yard Equipment [Member] | Minimum [Member] |
Property, Plant and Equipment [Line Items] |
Depreciation rate | 20.00%
Yard Equipment [Member] | Maximum [Member] |
Property, Plant and Equipment [Line Items] |
Depreciation rate | 30.00%
Automotive Equipment [Member] |
Property, Plant and Equipment [Line Items] |
Depreciation rate | 30.00%
Computer Equipment [Member] | Minimum [Member] |
Property, Plant and Equipment [Line Items] |
Fixed assets useful life | 3 years
Computer Equipment [Member] | Maximum [Member] |
Property, Plant and Equipment [Line Items] |
Fixed assets useful life | 5 years
Office Equipment [Member] |
Property, Plant and Equipment [Line Items] |
Depreciation rate | 20.00%

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- Definition Property Plant And Equipment Depreciation Rate + References No definition available. + Details
Name: | rba_PropertyPlantAndEquipmentDepreciationRate
Namespace Prefix: | rba_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- 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_PropertyPlantAndEquipmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_LandImprovementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_BuildingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=rba_YardEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_VehiclesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_ComputerEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_OfficeEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |