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v3.22.2.2

Employee Benefit Plans - Additional Information (Details) $ in Millions | 3 Months Ended
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Sep. 30, 2022 USD ($)
Retirement Benefits [Abstract] |
Defined benefit plan, expected future employer contributions, current fiscal year | $ 20.0

X
- Definition Defined benefit plan expected future employer contributions, current fiscal year. + References No definition available. + Details
Name: | osk_DefinedBenefitPlanExpectedFutureEmployerContributionsInCurrentFiscalYear
Namespace Prefix: | osk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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