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Revenue Recognition - Additional Information (Details 1) $ in Millions	Dec. 31, 2021 USD ($)
Disaggregation Of Revenue [Abstract]
Revenue, Remaining Performance Obligation, Amount	$ 5,790
Transaction price allocated to performance obligations to be satisfied during fiscal 2022	3,660
Transaction price allocated to performance obligations to be satisfied beyond fiscal 2022	$ 2,130

X

- Definition

Transaction price allocated to performance obligations expected to be satisfied beyond current fiscal year.

+ References

No definition available.

+ Details

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X

- Definition

Transaction price allocated to performance obligations to be satisfied during current fiscal year.

+ References

No definition available.

+ Details

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Namespace Prefix:	osk_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- References

No definition available.

+ Details

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X

- 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 http://asc.fasb.org/extlink&oid=123351226&loc=SL49130556-203045

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