XML 59 R38.htm IDEA: XBRL DOCUMENT
v3.22.2.2

Property, Plant and Equipment, net (Tables) | 12 Months Ended
--- | ---
Aug. 31, 2022
Property, Plant and Equipment [Abstract] |
Property, Plant and Equipment, Net |
|  | As of August 31, |
(In millions) |  | 2022 |  |  | 2021 |
Land and improvements |  | $ | 88.4 |  |  | $ | 94.6 |
Machinery and equipment |  |  | 623.7 |  |  |  | 609.8 |
Buildings and improvements |  |  | 367.1 |  |  |  | 379.1 |
Construction in progress |  |  | 55.3 |  |  |  | 50.0 |
Other |  |  | 107.4 |  |  |  | 92.8 |
|  |  | 1,241.9 |  |  |  | 1,226.3 |
Accumulated depreciation |  |  | (596.7 | ) |  |  | (556.1 | )
|  | $ | 645.2 |  |  | $ | 670.2 |

X
- Definition Schedule of Property, Plant and Equipment. + References No definition available. + Details
Name: | gbx_ScheduleOfPropertyPlantAndEquipmentTableTextBlock
Namespace Prefix: | gbx_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration