XML 55 R45.htm IDEA: XBRL DOCUMENT
v3.22.4

Revenue Recognition - Summary of Estimated Revenue Related to Performance Obligations (Detail) $ in Millions | Nov. 30, 2022 USD ($)
--- | ---
Railcar sales |  |
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items] |  |
Revenue type 1 | $ 2,000.0 |
Management services |  |
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items] |  |
Revenue type 1 | 122.0 |
Other |  |
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items] |  |
Revenue type 1 | 12.3 |
Manufacturing | Railcar sales |  |
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items] |  |
Revenue type 1 | 2,721.5 |
Manufacturing | Marine |  |
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items] |  |
Revenue type 1 | 55.6 |
Manufacturing | Sustainable conversions |  |
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items] |  |
Revenue type 1 | 151.6 |
Manufacturing | Railcars intended for syndication |  |
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items] |  |
Revenue type 1 | $ 469.0 | [1]
[1] | Not a performance obligation as defined in Topic 606.

X
- Definition Amount of transaction price allocated to performance obligation that has not been recognized as revenue. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130556-203045 + Details
Name: | us-gaap_RevenueRemainingPerformanceObligation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

X
- Details
Name: | srt_ProductOrServiceAxis=gbx_RailCarsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=gbx_ManagementServicesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=gbx_RevenueOtherMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=gbx_ManufacturingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=gbx_MarineMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=gbx_ConversionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=gbx_RailcarsForSyndicationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |