Revenue Recognition - Summary of Estimated Revenue Related to Performance Obligations (Detail) $ in Millions |
Aug. 31, 2026
USD ($)
|
|---|---|
| Railcar Sales | |
| Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items] | |
| Revenue type 1 | $ 979.7 |
| Fleet management | |
| Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items] | |
| Revenue type 1 | 92.0 |
| Manufacturing | Railcar Sales | |
| Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items] | |
| Revenue type 1 | 1,208.1 |
| Manufacturing | Railcar Maintenance | |
| Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items] | |
| Revenue type 1 | 16.2 |
| Leasing & Fleet Management | Fleet management | |
| Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items] | |
| Revenue type 1 | $ 136.7 |