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Revenue Recognition - Summary of Estimated Revenue Related to Performance Obligations (Detail) $ in Millions | May 31, 2022 USD ($)
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Railcar sales |  |
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items] |  |
Revenue type 1 | $ 2,500.0 |
Management services |  |
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items] |  |
Revenue type 1 | 124.4 |
Other |  |
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items] |  |
Revenue type 1 | 7.6 |
Manufacturing | Railcar sales |  |
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items] |  |
Revenue type 1 | 2,835.7 |
Manufacturing | Marine |  |
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items] |  |
Revenue type 1 | 40.6 |
Manufacturing | Conversions |  |
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items] |  |
Revenue type 1 | 227.1 |
Manufacturing | Railcars intended for syndication |  |
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items] |  |
Revenue type 1 | $ 639.8 | [1]
[1] | Not a performance obligation as defined in Topic 606.

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- Definition Amount of transaction price allocated to performance obligation that has not been recognized as revenue. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130556-203045 + Details
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