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Revenue Recognition - Additional Information (Details 1) $ in Billions	Sep. 30, 2025 USD ($)
Disaggregation of Revenue [Abstract]
Revenue, Remaining Performance Obligation, Amount	$ 12.4
Transaction price allocated to performance obligations to be satisfied during remaining fiscal 2025	1.1
Transaction price allocated to performance obligations expected to be satisfied in 2026	5.1
Transaction price allocated to performance obligations expected to be satisfied beyond 2026	$ 6.3

X

- Definition

Transaction price allocated to performance obligations expected to be satisfied beyond 2026.

+ References

No definition available.

+ Details

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X

- Definition

Transaction price allocated to performance obligations expected to be satisfied in 2026.

+ References

No definition available.

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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
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- References

No definition available.

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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
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (a)
-SubTopic 10
-Topic 606
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-13

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