XML 60 R49.htm IDEA: XBRL DOCUMENT
v3.21.2

Revenue Recognition - Additional Information (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020 | Sep. 30, 2020
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Other long-term assets | $ 323.9 |  | $ 323.9 |  | $ 286.5
Fire & Emergency |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Interest charges, Customer Advances | 4.4 | $ 4.5 | 12.8 | $ 11.7 |
Deferred Contract Related Costs |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Other long-term assets | 29.2 |  | 29.2 |  |
Anticipated Contracts Costs |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Other long-term assets | 6.5 |  | 6.5 |  |
Engineering Costs |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Other long-term assets | 20.8 |  | 20.8 |  |
Setup Costs |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Other long-term assets | 0.9 |  | 0.9 |  |
Tooling |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Other long-term assets | $ 1.0 |  | $ 1.0 |  |

X
- 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
Name: | us-gaap_DisaggregationOfRevenueLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The interest expense recognized during the period on customer deposits or security deposits held in interest bearing accounts. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.8) -URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227 + Details
Name: | us-gaap_InterestExpenseCustomerDeposits
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of noncurrent assets classified as other. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_OtherAssetsNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=osk_FireAndEmergencyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis=osk_DeferredContractRelatedCostsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis=osk_AnticipatedContractsCostsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis=osk_EngineeringCostsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis=osk_SetupCostsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis=osk_ToolingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |