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Goodwill and Other Intangible Assets (Changes in Goodwill by Reportable Segment) (Detail) - JPY (¥) ¥ in Millions | 12 Months Ended |
--- | --- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Mar. 31, 2022 | Mar. 31, 2021
Goodwill [Line Items] |  |  |  |  |
Acquired |  | ¥ 4,241 | ¥ 127,324 | ¥ 49,393 |
Impairment |  | 0 | 0 | (562) |
Other (net) | [1] | (154) | 11,503 | (55,251) |
Goodwill, Gross |  | 638,086 | 633,999 | 495,172 | ¥ 501,030
Accumulated impairment losses |  | (6,316) | (6,316) | (6,316) | (5,754)
Goodwill |  | 631,770 | 627,683 | 488,856 | 495,276
Corporate Financial Services and Maintenance Leasing |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Acquired |  | 0 | 3,529 | 0 |
Impairment |  | 0 | 0 | 0 |
Other (net) | [1] | (54) | 0 | (54,925) |
Goodwill, Gross |  | 15,900 | 15,954 | 12,425 | 67,350
Accumulated impairment losses |  | (849) | (849) | (849) | (849)
Goodwill |  | 15,051 | 15,105 | 11,576 | 66,501
Real Estate Segment |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Acquired |  | 0 | 0 | 0 |
Impairment |  | 0 | 0 | (191) |
Other (net) | [1] | 0 | 0 | 0 |
Goodwill, Gross |  | 16,359 | 16,359 | 16,359 | 16,359
Accumulated impairment losses |  | (191) | (191) | (191) | 0
Goodwill |  | 16,168 | 16,168 | 16,168 | 16,359
PE Investment and Concession |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Acquired |  | 4,241 | 119,767 | 0 |
Impairment |  | 0 | 0 | 0 |
Other (net) | [1] | (35,556) | (12,954) | (22,526) |
Goodwill, Gross |  | 175,436 | 206,751 | 99,938 | 122,464
Accumulated impairment losses |  | 0 | 0 | 0 | 0
Goodwill |  | 175,436 | 206,751 | 99,938 | 122,464
Environment and Energy |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Acquired |  | 0 | 4,028 | 49,115 |
Impairment |  | 0 | 0 | 0 |
Other (net) | [1] | 6,840 | 4,524 | 357 |
Goodwill, Gross |  | 65,047 | 58,207 | 49,655 | 183
Accumulated impairment losses |  | (39) | (39) | (39) | (39)
Goodwill |  | 65,008 | 58,168 | 49,616 | 144
Insurance |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Acquired |  | 0 | 0 | 0 |
Impairment |  | 0 | 0 | (371) |
Other (net) | [1] | (192) | 0 | 0 |
Goodwill, Gross |  | 4,823 | 5,015 | 5,015 | 5,015
Accumulated impairment losses |  | (371) | (371) | (371) | 0
Goodwill |  | 4,452 | 4,644 | 4,644 | 5,015
Banking and Credit |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Acquired |  | 0 | 0 | 0 |
Impairment |  | 0 | 0 | 0 |
Other (net) | [1] | (10,971) | 0 | 0 |
Goodwill, Gross |  | 0 | 10,971 | 10,971 | 10,971
Accumulated impairment losses |  | 0 | 0 | 0 | 0
Goodwill |  | 0 | 10,971 | 10,971 | 10,971
Aircraft and Ships |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Acquired |  | 0 | 0 | 0 |
Impairment |  | 0 | 0 | 0 |
Other (net) | [1] | 0 | 0 | 0 |
Goodwill, Gross |  | 587 | 587 | 587 | 587
Accumulated impairment losses |  | (587) | (587) | (587) | (587)
Goodwill |  | 0 | 0 | 0 | 0
ORIX USA |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Acquired |  | 0 | 0 | 0 |
Impairment |  | 0 | 0 | 0 |
Other (net) | [1] | 20,298 | 10,582 | 12,682 |
Goodwill, Gross |  | 173,374 | 153,076 | 142,494 | 129,812
Accumulated impairment losses |  | (1,494) | (1,494) | (1,494) | (1,494)
Goodwill |  | 171,880 | 151,582 | 141,000 | 128,318
ORIX Europe |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Acquired |  | 0 | 0 | 0 |
Impairment |  | 0 | 0 | 0 |
Other (net) | [1] | 18,927 | 9,318 | 8,773 |
Goodwill, Gross |  | 177,515 | 158,588 | 149,270 | 140,497
Accumulated impairment losses |  | 0 | 0 | 0 | 0
Goodwill |  | 177,515 | 158,588 | 149,270 | 140,497
Asia and Australia |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Acquired |  | 0 | 0 | 0 |
Impairment |  | 0 | 0 | 0 |
Other (net) | [1] | 554 | 33 | 388 |
Goodwill, Gross |  | 8,767 | 8,213 | 8,180 | 7,792
Accumulated impairment losses |  | (2,785) | (2,785) | (2,785) | (2,785)
Goodwill |  | 5,982 | 5,428 | 5,395 | 5,007
Corporate |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Acquired |  | 0 | 0 | 278 |
Impairment |  | 0 | 0 | 0 |
Other (net) | [1] | 0 | 0 | 0 |
Goodwill, Gross |  | 278 | 278 | 278 | 0
Accumulated impairment losses |  | 0 | 0 | 0 | 0
Goodwill |  | ¥ 278 | ¥ 278 | ¥ 278 | ¥ 0
[1] | Other (net) includes foreign currency translation adjustments, decreases due to sale of ownership interest in subsidiaries and certain other reclassifications.

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