Debt instrument covenant terms interest coverage ratio.

No definition available.

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- Definition

Debt instrument leverage ratio.

+ References

No definition available.

+ Details

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- Definition

Debt Instrument month and year.

+ References

No definition available.

+ Details

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- Definition

Represents the minimum fees for the letter of credit facility, expressed as a percent of the maximum amount available to be drawn against the letter of credit issued and outstanding under the credit facility.

+ References

No definition available.

+ Details

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- Definition

Represents the maximum fees for the letter of credit facility, expressed as a percent of the maximum amount available to be drawn against each letter of credit issued and outstanding under the credit facility.

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 55
-Paragraph 69C
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+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1B
-Subparagraph (b)
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-Subparagraph (SX 210.5-02.22(a)(1))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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Balance Type:	na
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Date when the debt instrument is scheduled to be fully repaid, in YYYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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-Paragraph 2
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Weighted average interest rate of debt outstanding.

+ References

No definition available.

+ Details

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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
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-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
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+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(3)
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-Paragraph 1
-Subparagraph (SX 210.5-02(22))
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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- References

No definition available.

+ Details

Name:	us-gaap_LongTermDebtAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3255-108585

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3291-108585

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The portion of the carrying amount of short-term borrowings outstanding as of the balance sheet date, which accrues interest at a rate subject to change from time to time.

+ References

No definition available.

+ Details

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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

For the form of debt having an initial term of less than one year or less than the normal operating cycle, if longer, the maximum amount borrowed at any time during the period.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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- Details

Name:	us-gaap_BusinessAcquisitionAxis=osk_HinowaSPAMember
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Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
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Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_LetterOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=osk_SeniorCreditAgreementMemberMember
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Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
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Name:	srt_RangeAxis=srt_MaximumMember
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- Details

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Data Type:	na
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Period Type:

- Details

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Period Type:

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Data Type:	na
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- Details

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- Details

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Period Type:

- Details

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- Details

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Credit Agreements - Additional Information (Details) € in Millions, ¥ in Millions, $ in Millions				1 Months Ended		3 Months Ended		12 Months Ended
	Feb. 28, 2023 USD ($)	Feb. 28, 2023 EUR (€)	Mar. 23, 2022 USD ($)	Feb. 29, 2020 USD ($)	May 31, 2018 USD ($)	Mar. 31, 2023 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2022 CNY (¥)	Mar. 31, 2023 EUR (€)	Jan. 31, 2023 USD ($)	Jan. 31, 2023 EUR (€)	Sep. 30, 2022 CNY (¥)	Mar. 31, 2022 CNY (¥)
Debt Instrument [Line Items]
Letters of credit outstanding						$ 10.8
Maximum leverage ratio						0.0375				0.0375
Debt outstanding						$ 595.2		$ 595.0
Repayments of debt						25.0	$ 225.0
Hinowa S.p.A.
Debt Instrument [Line Items]
Debt outstanding						$ 2.1				€ 2.0	$ 17.7	€ 16.3
Repayments of debt	$ 15.5	€ 14.3
Weighted average interest rate of debt outstanding						1.00%				1.00%
Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity			$ 1,100.0
Maturity month and year			2027-03
Available borrowing capacity						$ 1,090.0
Letter of Credit
Debt Instrument [Line Items]
Letter of credit fees percentage on available borrowing capacity, low end of range (as a percent)						0.4375%
Letter of credit fees percentage on available borrowing capacity, high end of range (as a percent)						1.50%
Senior Credit Agreement
Debt Instrument [Line Items]
Interest spread in basis points (as a percent)						1.125%
Minimum interest coverage ratio						0.0425				0.0425
Senior Credit Agreement \| Minimum
Debt Instrument [Line Items]
Revolving credit facility, unused commitment fee rate (as a percent)						0.08%
Senior Credit Agreement \| Maximum
Debt Instrument [Line Items]
Revolving credit facility, unused commitment fee rate (as a percent)						0.225%
Senior Credit Agreement \| Federal Funds Rate
Debt Instrument [Line Items]
Interest spread in basis points (as a percent)						0.50%
Senior Credit Agreement \| Term SOFR
Debt Instrument [Line Items]
Interest spread in basis points (as a percent)						1.00%
4.600% Senior Notes due May 2028
Debt Instrument [Line Items]
Maturity month and year						2028-05		2028-05	2028-05
Debt outstanding						$ 298.0		$ 297.9
Long term debt
Debt issued					$ 300.0
Debt instrument interest rate, stated percentage					4.60%	4.60%		4.60%		4.60%
Maturity date					May 15, 2028
Debt instruments
Debt instrument, fair value						$ 295.0		$ 285.0
3.100% Senior Notes due March 2030
Debt Instrument [Line Items]
Maturity month and year						2030-03		2030-03	2030-03
Debt outstanding						$ 297.2		$ 297.1
Long term debt
Debt issued				$ 300.0
Debt instrument interest rate, stated percentage				3.10%		3.10%		3.10%		3.10%
Maturity date				Mar. 01, 2030
Debt instruments
Debt instrument, fair value						$ 264.0		$ 254.0
100.0 Million Chinese Renminbi Uncommitted Line of Credit \| Uncommitted Line of Credit
Debt Instrument [Line Items]
Available borrowing capacity						$ 0.0								¥ 100.0
Long term debt
Line of credit outstanding								1.8	¥ 12.6
Line of credit variable interest rate						3.60%				3.60%
220.0 Million Chinese Renminbi Uncommitted Line of Credit \| Uncommitted Line of Credit
Debt Instrument [Line Items]
Available borrowing capacity \| ¥													¥ 220.0
Long term debt
Line of credit outstanding								$ 7.8	¥ 54.0
Line of credit variable interest rate						4.20%				4.20%