XML 137 R131.htm IDEA: XBRL DOCUMENT
v3.23.3

Write-Downs of Long-Lived Assets - Additional Information (Detail) - JPY (¥) ¥ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Property, Plant and Equipment [Abstract] |  |  |  |
Write-downs of long-lived assets | ¥ 452 | ¥ 145 | ¥ 538 | ¥ 253
Real Estate |  |  |  |
Property, Plant and Equipment [Abstract] |  |  |  |
Write-downs of long-lived assets | 366 | 106 | 440 | 174
Corporate Financial Services and Maintenance Leasing |  |  |  |
Property, Plant and Equipment [Abstract] |  |  |  |
Write-downs of long-lived assets | 36 |  | 36 |
Environment and Energy |  |  |  |
Property, Plant and Equipment [Abstract] |  |  |  |
Write-downs of long-lived assets | 28 |  | 28 | 39
PE Investment and Concession |  |  |  |
Property, Plant and Equipment [Abstract] |  |  |  |
Write-downs of long-lived assets | ¥ 22 | ¥ 39 | ¥ 34 | 39
Asia and Australia |  |  |  |
Property, Plant and Equipment [Abstract] |  |  |  |
Write-downs of long-lived assets |  |  |  | ¥ 1

X
- Definition The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of long-lived assets to fair value. + References No definition available. + Details
Name: | ck0001070304_ImpairmentOfWriteDownOfLongLivedAssets
Namespace Prefix: | ck0001070304_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_ProductOrServiceAxis=us-gaap_RealEstateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=ck0001070304_CorporateFinancialServicesAndMaintenanceLeasingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=ck0001070304_EnvironmentAndEnergyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=ck0001070304_PeInvestmentAndConcessionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=ck0001070304_AsiaAndAustraliaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |