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v3.25.3

Write-Downs of Long-Lived Assets - Additional Information (Detail) - JPY (¥) ¥ in Millions | 6 Months Ended
--- | ---
Sep. 30, 2025 | Sep. 30, 2024
Property, Plant and Equipment [Abstract] |  |
Write-downs of long-lived assets | ¥ 1,397 | ¥ 506
Corporate Financial Services and Maintenance Leasing |  |
Property, Plant and Equipment [Abstract] |  |
Write-downs of long-lived assets | 23 | 102
Segments Real Estate |  |
Property, Plant and Equipment [Abstract] |  |
Write-downs of long-lived assets | 6 | 102
PE Investment and Concession |  |
Property, Plant and Equipment [Abstract] |  |
Write-downs of long-lived assets | 919 | 59
Environment and Energy |  |
Property, Plant and Equipment [Abstract] |  |
Write-downs of long-lived assets | 338 | ¥ 243
Asia And Australia [Member] |  |
Property, Plant and Equipment [Abstract] |  |
Write-downs of long-lived assets | ¥ 111 |

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- 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
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Namespace Prefix: | ck0001070304_
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- References No definition available. + Details
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- Details
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- Details
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- Details
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- Details
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- Details
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