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Goodwill and Other Intangible Assets - Additional Information (Detail) - JPY (¥) ¥ in Millions | 12 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Mar. 31, 2022
Intangible Assets by Major Class [Line Items] |  |  |
Impairment losses on goodwill | ¥ 0 | ¥ 0 | ¥ 562
Aggregate amortization expenses for intangible assets | 39,213 | 34,212 | 32,235
Estimated amortization expenses in fiscal 2025 | 39,066 |  |
Estimated amortization expenses in fiscal 2026 | 34,108 |  |
Estimated amortization expenses in fiscal 2027 | 32,021 |  |
Estimated amortization expenses in fiscal 2028 | 26,415 |  |
Estimated amortization expenses in fiscal 2029 | 25,322 |  |
Intangible assets subject to amortization acquired | 41,043 |  |
Corporate Financial Services and Maintenance Leasing |  |  |
Intangible Assets by Major Class [Line Items] |  |  |
Impairment of intangible assets excluding goodwill |  | 1 | 650
Real Estate Segment |  |  |
Intangible Assets by Major Class [Line Items] |  |  |
Impairment losses on goodwill | 0 | 0 | 191
PE Investment and Concession Segment |  |  |
Intangible Assets by Major Class [Line Items] |  |  |
Impairment of intangible assets excluding goodwill | 24 |  |
ORIX USA |  |  |
Intangible Assets by Major Class [Line Items] |  |  |
Impairment losses on goodwill | 0 | 0 | 0
Impairment of intangible assets excluding goodwill |  | 110 |
Environment and Energy |  |  |
Intangible Assets by Major Class [Line Items] |  |  |
Impairment losses on goodwill | 0 | 0 | 0
Impairment of intangible assets excluding goodwill | 87 |  |
Aircraft and Ships |  |  |
Intangible Assets by Major Class [Line Items] |  |  |
Impairment losses on goodwill | 0 | 0 | 0
Impairment of intangible assets excluding goodwill |  | 405 | 259
Insurance [Member] |  |  |
Intangible Assets by Major Class [Line Items] |  |  |
Impairment losses on goodwill | 0 | 0 | 371
ORIX Europe [Member] |  |  |
Intangible Assets by Major Class [Line Items] |  |  |
Impairment losses on goodwill | 0 | 0 | 0
Impairment of intangible assets excluding goodwill |  |  | 21,090
Asia and Australia |  |  |
Intangible Assets by Major Class [Line Items] |  |  |
Impairment losses on goodwill | 0 | ¥ 0 | ¥ 0
Impairment of intangible assets excluding goodwill | 37 |  |
Software |  |  |
Intangible Assets by Major Class [Line Items] |  |  |
Intangible assets subject to amortization acquired | ¥ 16,500 |  |
Weighted average amortization period | 7 years |  |
Customer relationships and others |  |  |
Intangible Assets by Major Class [Line Items] |  |  |
Intangible assets subject to amortization acquired | ¥ 12,273 |  |
Weighted average amortization period | 16 years |  |

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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a)(3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482665/350-30-50-1 + Details
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