XML 57 R48.htm IDEA: XBRL DOCUMENT
v3.24.1

Revolving Notes - Additional Information (Detail) - USD ($) | 6 Months Ended |
--- | --- | ---
Feb. 29, 2024 | Aug. 31, 2023
Line of Credit Facility [Line Items] |  |
Long-term line of credit | $ 300,800,000 | $ 297,100,000
Notional covering percentage of outstanding balance | 99.00% |
European |  |
Line of Credit Facility [Line Items] |  |
Line of credit, guaranteed amount | $ 32,500,000 |
Mexican |  |
Line of Credit Facility [Line Items] |  |
Line of credit facility maximum capacity | $ 96,000,000 |
Minimum | European |  |
Line of Credit Facility [Line Items] |  |
Line of credit maturity date | 2024-06 |
Minimum | Mexican |  |
Line of Credit Facility [Line Items] |  |
Line of credit facility borrowings outstanding due period | 2024-06 |
Maximum | European |  |
Line of Credit Facility [Line Items] |  |
Line of credit maturity date | 2025-11 |
Maximum | Mexican |  |
Line of Credit Facility [Line Items] |  |
Line of credit facility borrowings outstanding due period | 2027-01 |
WIBOR | Minimum | European |  |
Line of Credit Facility [Line Items] |  |
Debt instrument, percentage points added to the reference rate | 1.20% |
WIBOR | Maximum | European |  |
Line of Credit Facility [Line Items] |  |
Debt instrument, percentage points added to the reference rate | 1.60% |
EURIBOR | European |  |
Line of Credit Facility [Line Items] |  |
Debt instrument, percentage points added to the reference rate | 1.90% |
Senior Secured Credit Facilities |  |
Line of Credit Facility [Line Items] |  |
Line of credit facility maximum capacity | $ 1,400,000,000 |
Letter of credit facility outstanding amount | 7,100,000 | 4,900,000
Senior Secured Credit Facilities | North American |  |
Line of Credit Facility [Line Items] |  |
Long-term line of credit | 55,000,000 |
Senior Secured Credit Facilities | European |  |
Line of Credit Facility [Line Items] |  |
Long-term line of credit | 31,600,000 | 47,200,000
Senior Secured Credit Facilities | Mexican |  |
Line of Credit Facility [Line Items] |  |
Long-term line of credit | 125,000,000 | 110,000,000
Committed Credit Facilities |  |
Line of Credit Facility [Line Items] |  |
Aggregate amount available to draw down | 329,300,000 |
Committed Credit Facilities | North American |  |
Line of Credit Facility [Line Items] |  |
Aggregate amount available to draw down | 214,600,000 |
Committed Credit Facilities | European |  |
Line of Credit Facility [Line Items] |  |
Aggregate amount available to draw down | 43,700,000 |
Committed Credit Facilities | Mexican |  |
Line of Credit Facility [Line Items] |  |
Aggregate amount available to draw down | 71,000,000 |
Revolving Line of Credit, 1st Component of Senior Secured Credit Facilities | North American |  |
Line of Credit Facility [Line Items] |  |
Line of credit facility maximum capacity | $ 600,000,000 |
Line of credit maturity date | 2026-08 |
Revolving Line of Credit, 1st Component of Senior Secured Credit Facilities | European |  |
Line of Credit Facility [Line Items] |  |
Line of credit facility maximum capacity | $ 75,300,000 |
Revolving Line of Credit, 1st Component of Senior Secured Credit Facilities | Prime Rate | North American |  |
Line of Credit Facility [Line Items] |  |
Debt instrument, percentage points added to the reference rate | 0.75% |
Revolving Line of Credit, 1st Component of Senior Secured Credit Facilities | SOFR | North American |  |
Line of Credit Facility [Line Items] |  |
Debt instrument, percentage points added to the reference rate | 1.75% |
Revolving Line of Credit, 1st Component of Senior Secured Credit Facilities | SOFR Adjustment | North American |  |
Line of Credit Facility [Line Items] |  |
Debt instrument, percentage points added to the reference rate | 0.10% |
GBX Leasing |  |
Line of Credit Facility [Line Items] |  |
Line of credit facility maximum capacity | $ 550,000,000 |
Line of credit maturity date | 2027-08 |
Long-term line of credit | $ 89,200,000 | $ 139,900,000
GBX Leasing | SOFR |  |
Line of Credit Facility [Line Items] |  |
Debt instrument, percentage points added to the reference rate | 1.85% |
GBX Leasing | SOFR Adjustment |  |
Line of Credit Facility [Line Items] |  |
Debt instrument, percentage points added to the reference rate | 0.11% |
Mexican Railcar Manufacturing Joint Venture Line of Credit, 4 Component of Senior Secured Credit Facilities | Mexican |  |
Line of Credit Facility [Line Items] |  |
Line of credit facility maximum capacity | $ 196,000,000 |
Mexican Railcar Manufacturing Operations Line of Credit 1, 4 Component of Senior Secured Credit Facilities | LIBOR | Mexican |  |
Line of Credit Facility [Line Items] |  |
Debt instrument, percentage points added to the reference rate | 4.25% |
Mexican Railcar Manufacturing Operations Line of Credit 2, 4 Component of Senior Secured Credit Facilities | SOFR | Mexican |  |
Line of Credit Facility [Line Items] |  |
Debt instrument, percentage points added to the reference rate | 2.22% |
Mexican Railcar Manufacturing Operations Line of Credit 3, 4 Component of Senior Secured Credit Facilities | Mexican |  |
Line of Credit Facility [Line Items] |  |
Joint venture partner each guaranteed percentage | 50.00% |

X
- Definition Line Of Credit Facility Expiration Month And Year + References No definition available. + Details
Name: | gbx_LineOfCreditFacilityExpirationMonthAndYear
Namespace Prefix: | gbx_
Data Type: | xbrli:gYearMonthItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line of credit, guaranteed amount. + References No definition available. + Details
Name: | gbx_LineOfCreditGuaranteedAmount
Namespace Prefix: | gbx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Line of Credit Maturity Month and Year + References No definition available. + Details
Name: | gbx_LineOfCreditMaturityMonthAndYear
Namespace Prefix: | gbx_
Data Type: | xbrli:gYearMonthItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage Of Joint Venture Debt Guaranteed + References No definition available. + Details
Name: | gbx_PercentageOfJointVentureDebtGuaranteed
Namespace Prefix: | gbx_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
Name: | us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)(a)(2)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1 + Details
Name: | us-gaap_LineOfCredit
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity
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 Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(f)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480678/235-10-S99-1 + Details
Name: | us-gaap_LineOfCreditFacilityLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Percentage of an entity's outstanding debt that is designated as a hedged item in cash flow, fair value, or net investment hedge. + References No definition available. + Details
Name: | us-gaap_PercentageOfDebtHedgedByInterestRateDerivatives
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | srt_StatementGeographicalAxis=srt_EuropeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=country_MX
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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_VariableRateAxis=gbx_WiborMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_VariableRateAxis=gbx_EuroInterbankOfferedRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=us-gaap_LineOfCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=srt_NorthAmericaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=gbx_CommittedCreditFacilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_VariableRateAxis=us-gaap_PrimeRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_VariableRateAxis=gbx_SecuredOvernightFinancingRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_VariableRateAxis=gbx_SofrAdjustmentRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=gbx_GBXLeasingWarehouseFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=gbx_ForeignLineOfCreditFourMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=gbx_SeniorSecuredCreditFacilityRevolvingLineOfCreditComponentOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_VariableRateAxis=gbx_LondonInterBankOfferedRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=gbx_SeniorSecuredCreditFacilityRevolvingLineOfCreditComponentTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=gbx_SeniorSecuredCreditFacilityRevolvingLineOfCreditComponentThreeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |