Interim Financial Statements	3 Months Ended
Nov. 30, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Interim Financial Statements	Note 1 – Interim Financial Statements The Condensed Consolidated Financial Statements of The Greenbrier Companies, Inc. and its subsidiaries (Greenbrier or the Company) as of November 30, 2022 and for the three months ended November 30, 2022 and 2021 have been prepared to reflect all adjustments (consisting of normal recurring accruals) that, in the opinion of management, are necessary for a fair presentation of the financial position, operating results and cash flows for the periods indicated. The results of operations for the three months ended November 30, 2022 are not necessarily indicative of the results to be expected for the entire year ending August 31, 2023. Certain notes and other information have been condensed or omitted from the interim financial statements presented in this Quarterly Report on Form 10-Q. Therefore, these unaudited financial statements should be read in conjunction with the Consolidated Financial Statements contained in the Company’s Annual Report on Form 10-K for the year ended August 31, 2022. Management Estimates – The preparation of financial statements in conformity with accounting principles generally accepted in the U.S. (GAAP) requires judgment on the part of management to arrive at estimates and assumptions on matters that are inherently uncertain. These estimates may affect the amount of assets, liabilities, revenue and expenses reported in the financial statements and accompanying notes and disclosure of contingent assets and liabilities within the financial statements. Estimates and assumptions are periodically evaluated and may be adjusted in future periods. Actual results could differ from those estimates. Reclassifications - Certain immaterial reclassifications have been made to the accompanying prior year Condensed Consolidated Financial Statements to conform to the current year presentation. Initial Adoption of Accounting Standards Reference Rate Reform In March 2020, the Financial Accounting Standards Board (FASB) issued Accounting Standard Update (ASU) 2020-04, Reference Rate Reform (Topic 848): Facilitation of Effects of Reference Rate Reform on Financial Reporting (ASU 2020-04), which provides practical expedients and exceptions for applying GAAP to contracts, hedging relationships, and other transactions affected by reference rate reform if certain criteria are met. The elective amendments provide expedients to contract modification, affected by reference rate reform if certain criteria are met. The expedients and exceptions provided by this guidance apply only to contracts, hedging relationships, and other transactions that reference the London interbank offered rate (LIBOR) or another reference rate expected to be discontinued as a result of reference rate reform. In December 2022, the FASB issued ASU 2022-06, Reference Rate Reform (Topic 848): Deferral of the Sunset Date of Topic 848, to extend the temporary accounting rules under Topic 848 from December 31, 2022 to December 31, 2024. This guidance is not applicable to contract modifications made and hedging relationships entered into or evaluated after December 31, 2024. During the fourth quarter of fiscal year 2022, the Company adopted the optional relief guidance provided under ASU 2020-04 after modifying certain debt to update the reference rate from LIBOR to the Secured Overnight Financing Rate (SOFR). This caused a temporary mismatch in our interest rate swap and debt for a period of time. The application of this expedient preserves the presentation of the derivatives consistent with past presentation. The Company will continue to assess the impact of the guidance and may apply other elections as applicable going forward.

Interim Financial Statements

3 Months Ended

Nov. 30, 2022

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Note 1 – Interim Financial Statements

The Condensed Consolidated Financial Statements of The Greenbrier Companies, Inc. and its subsidiaries (Greenbrier or the Company) as of November 30, 2022 and for the three months ended November 30, 2022 and 2021 have been prepared to reflect all adjustments (consisting of normal recurring accruals) that, in the opinion of management, are necessary for a fair presentation of the financial position, operating results and cash flows for the periods indicated. The results of operations for the three months ended November 30, 2022 are not necessarily indicative of the results to be expected for the entire year ending August 31, 2023.

Certain notes and other information have been condensed or omitted from the interim financial statements presented in this Quarterly Report on Form 10-Q. Therefore, these unaudited financial statements should be read in conjunction with the Consolidated Financial Statements contained in the Company’s Annual Report on Form 10-K for the year ended August 31, 2022.

Management Estimates – The preparation of financial statements in conformity with accounting principles generally accepted in the U.S. (GAAP) requires judgment on the part of management to arrive at estimates and assumptions on matters that are inherently uncertain. These estimates may affect the amount of assets, liabilities, revenue and expenses reported in the financial statements and accompanying notes and disclosure of contingent assets and liabilities within the financial statements. Estimates and assumptions are periodically evaluated and may be adjusted in future periods. Actual results could differ from those estimates.

Reclassifications - Certain immaterial reclassifications have been made to the accompanying prior year Condensed Consolidated Financial Statements to conform to the current year presentation.

Initial Adoption of Accounting Standards

Reference Rate Reform

In March 2020, the Financial Accounting Standards Board (FASB) issued Accounting Standard Update (ASU) 2020-04, Reference Rate Reform (Topic 848): Facilitation of Effects of Reference Rate Reform on Financial Reporting (ASU 2020-04), which provides practical expedients and exceptions for applying GAAP to contracts, hedging relationships, and other transactions affected by reference rate reform if certain criteria are met. The elective amendments provide expedients to contract modification, affected by reference rate reform if certain criteria are met. The expedients and exceptions provided by this guidance apply only to contracts, hedging relationships, and other transactions that reference the London interbank offered rate (LIBOR) or another reference rate expected to be discontinued as a result of reference rate reform. In December 2022, the FASB issued ASU 2022-06, Reference Rate Reform (Topic 848): Deferral of the Sunset Date of Topic 848, to extend the temporary accounting rules under Topic 848 from December 31, 2022 to December 31, 2024. This guidance is not applicable to contract modifications made and hedging relationships entered into or evaluated after December 31, 2024. During the fourth quarter of fiscal year 2022, the Company adopted the optional relief guidance provided under ASU 2020-04 after modifying certain debt to update the reference rate from LIBOR to the Secured Overnight Financing Rate (SOFR). This caused a temporary mismatch in our interest rate swap and debt for a period of time. The application of this expedient preserves the presentation of the derivatives consistent with past presentation. The Company will continue to assess the impact of the guidance and may apply other elections as applicable going forward.