XML 102 R85.htm IDEA: XBRL DOCUMENT v3.21.2

Employee Benefit Plans - Schedule of Pension Plan Asset and Target Allocation (Details) - Pension Plan	Sep. 30, 2021
Asset Category
Total assets (as a percent)	100.00%
Fixed income
Asset Category
Total assets (as a percent)	53.00%
Large-cap Equity
Asset Category
Total assets (as a percent)	22.00%
Mid-cap Equity
Asset Category
Total assets (as a percent)	11.00%
Small-cap Equity
Asset Category
Total assets (as a percent)	8.00%
Global Equity
Asset Category
Total assets (as a percent)	1.00%
Other
Asset Category
Total assets (as a percent)	5.00%
Minimum | Fixed income
Asset Category
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	50.00%
Minimum | Large-cap Equity
Asset Category
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	15.00%
Minimum | Mid-cap Equity
Asset Category
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	5.00%
Minimum | Small-cap Equity
Asset Category
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	5.00%
Minimum | Global Equity
Asset Category
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	0.00%
Minimum | Other
Asset Category
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	0.00%
Maximum | Fixed income
Asset Category
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	60.00%
Maximum | Large-cap Equity
Asset Category
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	25.00%
Maximum | Mid-cap Equity
Asset Category
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	15.00%
Maximum | Small-cap Equity
Asset Category
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	10.00%
Maximum | Global Equity
Asset Category
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	5.00%
Maximum | Other
Asset Category
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	10.00%

X

- References

No definition available.

+ Details

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

X

- Definition

Percentage of target investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 55
-Paragraph 17
-URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(i)
-URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920

+ Details

Name:	us-gaap_DefinedBenefitPlanPlanAssetsTargetAllocationPercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Percentage of actual investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(i)
-URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920

+ Details

Name:	us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	us-gaap_RetirementPlanTypeAxis=us-gaap_PensionPlansDefinedBenefitMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_FixedIncomeSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=osk_LargeCapEquityFundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=osk_MidCapEquityFundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=osk_SmallCapEquityFundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=osk_GlobalEquityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=osk_OtherPensionPlanInvestmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: