Cover Page - USD ($) |
12 Months Ended | ||
|---|---|---|---|
Aug. 31, 2026 |
Oct. 20, 2026 |
Feb. 27, 2026 |
|
| Cover [Abstract] | |||
| Document Type | 10-K | ||
| Amendment Flag | false | ||
| Document Period End Date | Aug. 31, 2026 | ||
| Document Fiscal Year Focus | 2026 | ||
| Document Fiscal Period Focus | FY | ||
| Entity Registrant Name | THE GREENBRIER COMPANIES, INC. | ||
| Trading Symbol | GBX | ||
| Security Exchange Name | NYSE | ||
| Entity Central Index Key | 0000923120 | ||
| Current Fiscal Year End Date | --08-31 | ||
| Entity Current Reporting Status | Yes | ||
| Entity Interactive Data Current | Yes | ||
| Entity Well-known Seasoned Issuer | Yes | ||
| Entity Voluntary Filers | No | ||
| Entity Filer Category | Large Accelerated Filer | ||
| Title of 12(b) Security | Common Stock | ||
| Entity Common Stock, Shares Outstanding | 30,998,599 | ||
| Entity Public Float | $ 1,703,351,082 | ||
| Document Annual Report | true | ||
| Document Transition Report | false | ||
| Entity File Number | 1-13146 | ||
| Entity Emerging Growth Company | false | ||
| Entity Small Business | false | ||
| ICFR Auditor Attestation Flag | true | ||
| Entity Shell Company | false | ||
| Entity Incorporation, State or Country Code | OR | ||
| Entity Tax Identification Number | 93-0816972 | ||
| Entity Address, Address Line One | One Centerpointe Drive | ||
| Entity Address, Address Line Two | Suite 200 | ||
| Entity Address, City or Town | Lake Oswego | ||
| Entity Address, State or Province | OR | ||
| Entity Address, Postal Zip Code | 97035 | ||
| City Area Code | 503 | ||
| Local Phone Number | 684-7000 | ||
| Documents Incorporated by Reference | Certain portions of the registrant’s definitive Proxy Statement prepared in connection with the Annual Meeting of Shareholders to be held on January 6, 2027 are incorporated by reference into Part III of this Report. |
||
| Auditor Firm ID | 185 | ||
| Auditor Name | KPMG LLP | ||
| Auditor Location | Portland, OR | ||
| Document Financial Statement Error Correction [Flag] | false | ||
| Auditor Opinion | Opinion on the Consolidated Financial Statements We have audited the accompanying consolidated balance sheets of The Greenbrier Companies, Inc. and subsidiaries (the Company) as of August 31, 2026 and 2025, the related consolidated statements of income, comprehensive income, equity, and cash flows for each of the years in the three-year period ended August 31, 2026, and the related notes (collectively, the consolidated financial statements). In our opinion, the consolidated financial statements present fairly, in all material respects, the financial position of the Company as of August 31, 2026 and 2025, and the results of its operations and its cash flows for each of the years in the three-year period ended August 31, 2026, in conformity with U.S. generally accepted accounting principles. We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company’s internal control over financial reporting as of August 31, 2026, based on criteria established in Internal Control – Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission, and our report dated October 26, 2026 expressed an unqualified opinion on the effectiveness of the Company’s internal control over financial reporting. |