XML 18 R8.htm IDEA: XBRL DOCUMENT
v3.22.4

Condensed Consolidated Statements of Equity (Parenthetical) - $ / shares | 3 Months Ended
--- | ---
Nov. 30, 2022 | Nov. 30, 2021
Equity Excluding Contingently Redeemable Noncontrolling Interest |  |
Cash dividend per share | $ 0.27 | $ 0.27

X
- Definition Aggregate dividends declared during the period for each share of common stock outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI https://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 + Details
Name: | us-gaap_CommonStockDividendsPerShareDeclared
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=gbx_EquityExcludingContingentlyRedeemableNoncontrollingInterestMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |