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Segment Information (Financial Information of Segments) (Detail) - JPY (¥) ¥ in Millions | 12 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Mar. 31, 2022
Segment Reporting Information [Line Items] |  |  |
Revenues | ¥ 2,814,361 | ¥ 2,663,659 | ¥ 2,508,043
Interest expense | 188,328 | 127,618 | 68,232
Depreciation and amortization | 364,242 | 340,252 | 320,339
Other significant non-cash items: |  |  |
Provision for credit losses | 20,968 | 8,117 | 5,388
Write-downs of long-lived assets | 1,724 | 2,297 | 35,666
Increase (Decrease) in policy liabilities and policy account balances | 186,193 | 89,915 | 146,642
Bargain Purchase Gain | 0 | 1,174 | 0
Segment profits | 360,713 | 335,923 | 292,883
Segment assets | 16,322,100 | 15,289,385 | 14,280,684
Equity method investments | 1,313,887 | 1,062,410 |
Operating Segment |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 2,804,921 | 2,661,264 | 2,510,397
Finance revenues | 350,231 | 321,249 | 283,498
Interest expense | 190,278 | 129,286 | 70,819
Depreciation and amortization | 358,825 | 333,089 | 311,292
Other significant non-cash items: |  |  |
Provision for credit losses | 20,968 | 8,121 | 5,395
Write-downs of long-lived assets | 1,724 | 2,249 | 35,666
Increase (Decrease) in policy liabilities and policy account balances | 60,453 | (80,641) | 90,276
Equity in net income (loss) of equity method investments and gains (losses) on sales of subsidiaries and equity method investments, net | 109,145 | 55,047 | 216,516
Bargain Purchase Gain |  | 1,174 |
Segment profits | 494,152 | 406,231 | 536,056
Segment assets | 13,850,946 | 12,595,988 | 12,001,540
Long-lived assets | 2,663,704 | 2,300,328 | 2,150,430
Expenditures for long-lived assets | 667,210 | 600,511 | 452,217
Equity method investments | 1,313,471 | 1,061,986 | 1,033,390
Operating Segment | Corporate Financial Services and Maintenance Leasing |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 444,959 | 429,897 | 445,328
Finance revenues | 61,428 | 60,133 | 57,642
Interest expense | 7,467 | 6,375 | 5,783
Depreciation and amortization | 153,208 | 149,545 | 156,116
Other significant non-cash items: |  |  |
Provision for credit losses | 731 | 1,036 | 1,296
Write-downs of long-lived assets | 225 | 67 | 1,092
Increase (Decrease) in policy liabilities and policy account balances | 0 | 0 | 0
Equity in net income (loss) of equity method investments and gains (losses) on sales of subsidiaries and equity method investments, net | 1,305 | 1,518 | 164,029
Bargain Purchase Gain |  | 0 |
Segment profits | 81,195 | 75,025 | 241,450
Segment assets | 1,552,322 | 1,514,070 | 1,516,795
Long-lived assets | 516,852 | 500,111 | 508,035
Expenditures for long-lived assets | 183,167 | 160,920 | 146,851
Equity method investments | 14,984 | 13,416 | 14,794
Operating Segment | Real Estate |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 471,692 | 418,736 | 390,688
Finance revenues | 6,134 | 5,562 | 5,602
Interest expense | 4,236 | 3,367 | 2,873
Depreciation and amortization | 18,376 | 16,613 | 16,164
Other significant non-cash items: |  |  |
Provision for credit losses | 66 | 61 | 173
Write-downs of long-lived assets | 1,218 | 1,724 | 88
Increase (Decrease) in policy liabilities and policy account balances | 0 | 0 | 0
Equity in net income (loss) of equity method investments and gains (losses) on sales of subsidiaries and equity method investments, net | 6,089 | 9,580 | 1,575
Bargain Purchase Gain |  | 0 |
Segment profits | 65,835 | 51,578 | 32,021
Segment assets | 994,115 | 935,027 | 910,101
Long-lived assets | 565,868 | 592,190 | 574,661
Expenditures for long-lived assets | 64,060 | 89,380 | 78,601
Equity method investments | 143,751 | 117,040 | 113,178
Operating Segment | PE Investment And Concession |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 379,168 | 376,322 | 385,573
Finance revenues | 6,679 | 1,026 | 1,101
Interest expense | 3,567 | 2,376 | 2,547
Depreciation and amortization | 26,644 | 22,649 | 22,325
Other significant non-cash items: |  |  |
Provision for credit losses | 306 | (84) | 924
Write-downs of long-lived assets | 60 | 229 | 11,657
Increase (Decrease) in policy liabilities and policy account balances | 0 | 0 | 0
Equity in net income (loss) of equity method investments and gains (losses) on sales of subsidiaries and equity method investments, net | 10,157 | (5,192) | (10,873)
Bargain Purchase Gain |  | 58 |
Segment profits | 43,378 | 2,837 | (11,642)
Segment assets | 772,834 | 605,471 | 353,581
Long-lived assets | 95,769 | 100,848 | 85,698
Expenditures for long-lived assets | 18,913 | 15,328 | 11,884
Equity method investments | 118,310 | 28,796 | 35,869
Operating Segment | Environment and Energy |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 165,598 | 215,770 | 160,232
Finance revenues | 1,478 | 1,230 | 1,001
Interest expense | 19,267 | 12,276 | 5,365
Depreciation and amortization | 23,975 | 22,486 | 18,140
Other significant non-cash items: |  |  |
Provision for credit losses | 13 | (8) | 0
Write-downs of long-lived assets | 138 | 58 | 19,564
Increase (Decrease) in policy liabilities and policy account balances | 0 | 0 | 0
Equity in net income (loss) of equity method investments and gains (losses) on sales of subsidiaries and equity method investments, net | 4,532 | 19,966 | 7,295
Bargain Purchase Gain |  | 1,018 |
Segment profits | 29,898 | 32,960 | 997
Segment assets | 847,049 | 773,617 | 703,608
Long-lived assets | 498,461 | 450,797 | 388,399
Expenditures for long-lived assets | 55,838 | 76,556 | 30,200
Equity method investments | 219,018 | 188,436 | 202,589
Operating Segment | Insurance |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 563,869 | 499,487 | 486,704
Finance revenues | 300 | 300 | 265
Interest expense | 806 | 365 | 551
Depreciation and amortization | 17,138 | 18,628 | 17,872
Other significant non-cash items: |  |  |
Provision for credit losses | (2) | (1) | 0
Write-downs of long-lived assets | 0 | 0 | 0
Increase (Decrease) in policy liabilities and policy account balances | 60,453 | (80,641) | 90,276
Equity in net income (loss) of equity method investments and gains (losses) on sales of subsidiaries and equity method investments, net | 205 | 0 | 0
Bargain Purchase Gain |  | 0 |
Segment profits | 70,034 | 62,990 | 57,861
Segment assets | 2,309,357 | 2,050,412 | 2,072,145
Long-lived assets | 26,590 | 27,194 | 27,962
Expenditures for long-lived assets | 8 | 0 | 0
Equity method investments | 29,742 | 17,577 | 10,772
Operating Segment | Banking and credit |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 88,574 | 84,774 | 82,719
Finance revenues | 80,653 | 78,066 | 76,191
Interest expense | 5,911 | 5,698 | 5,259
Depreciation and amortization | 1,821 | 1,402 | 1,335
Other significant non-cash items: |  |  |
Provision for credit losses | 4,064 | 716 | 2,395
Write-downs of long-lived assets | 0 | 0 | 0
Increase (Decrease) in policy liabilities and policy account balances | 0 | 0 | 0
Equity in net income (loss) of equity method investments and gains (losses) on sales of subsidiaries and equity method investments, net | 57,063 | (488) | 2,103
Bargain Purchase Gain |  | 0 |
Segment profits | 96,744 | 37,610 | 41,498
Segment assets | 2,733,021 | 2,698,747 | 2,687,156
Long-lived assets | 0 | 0 | 0
Expenditures for long-lived assets | 0 | 0 | 0
Equity method investments | 43,601 | 2,006 | 2,114
Operating Segment | Aircraft and Ships |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 65,191 | 54,665 | 39,441
Finance revenues | 7,769 | 7,312 | 3,382
Interest expense | 29,189 | 18,877 | 11,400
Depreciation and amortization | 20,366 | 16,257 | 15,669
Other significant non-cash items: |  |  |
Provision for credit losses | 3 | 1 | 0
Write-downs of long-lived assets | 0 | 0 | 2,331
Increase (Decrease) in policy liabilities and policy account balances | 0 | 0 | 0
Equity in net income (loss) of equity method investments and gains (losses) on sales of subsidiaries and equity method investments, net | 18,393 | 9,089 | (6,274)
Bargain Purchase Gain |  | 98 |
Segment profits | 26,773 | 18,583 | (2,319)
Segment assets | 1,058,435 | 742,890 | 684,098
Long-lived assets | 565,846 | 295,549 | 271,592
Expenditures for long-lived assets | 174,517 | 103,993 | 70,370
Equity method investments | 399,061 | 347,508 | 306,646
Operating Segment | ORIX USA |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 173,426 | 185,889 | 153,597
Finance revenues | 112,545 | 106,875 | 91,021
Interest expense | 58,060 | 43,643 | 17,140
Depreciation and amortization | 2,872 | 3,023 | 2,678
Other significant non-cash items: |  |  |
Provision for credit losses | 7,843 | 3,856 | (278)
Write-downs of long-lived assets | 0 | 114 | 928
Increase (Decrease) in policy liabilities and policy account balances | 0 | 0 | 0
Equity in net income (loss) of equity method investments and gains (losses) on sales of subsidiaries and equity method investments, net | (2,955) | 6,635 | 29,789
Bargain Purchase Gain |  | 0 |
Segment profits | 17,337 | 49,021 | 75,235
Segment assets | 1,537,025 | 1,462,717 | 1,366,098
Long-lived assets | 9,841 | 12,639 | 13,399
Expenditures for long-lived assets | 60 | 1,428 | 717
Equity method investments | 61,415 | 87,513 | 89,220
Operating Segment | ORIX Europe |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 227,151 | 207,292 | 220,872
Finance revenues | 2,409 | 812 | 56
Interest expense | 13,308 | 4,317 | (647)
Depreciation and amortization | 7,003 | 6,619 | 1,225
Other significant non-cash items: |  |  |
Provision for credit losses | 0 | 0 | 0
Write-downs of long-lived assets | 0 | 0 | 0
Increase (Decrease) in policy liabilities and policy account balances | 0 | 0 | 0
Equity in net income (loss) of equity method investments and gains (losses) on sales of subsidiaries and equity method investments, net | 3,113 | (123) | 689
Bargain Purchase Gain |  | 0 |
Segment profits | 28,619 | 40,675 | 49,334
Segment assets | 459,248 | 417,941 | 401,869
Long-lived assets | 0 | 0 | 0
Expenditures for long-lived assets | 0 | 0 | 0
Equity method investments | 11,907 | 10,213 | 9,820
Operating Segment | Asia and Australia |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 225,293 | 188,432 | 145,243
Finance revenues | 70,836 | 59,933 | 47,237
Interest expense | 48,467 | 31,992 | 20,548
Depreciation and amortization | 87,422 | 75,867 | 59,768
Other significant non-cash items: |  |  |
Provision for credit losses | 7,944 | 2,544 | 885
Write-downs of long-lived assets | 83 | 57 | 6
Increase (Decrease) in policy liabilities and policy account balances | 0 | 0 | 0
Equity in net income (loss) of equity method investments and gains (losses) on sales of subsidiaries and equity method investments, net | 11,243 | 14,062 | 28,183
Bargain Purchase Gain |  | 0 |
Segment profits | 34,339 | 34,952 | 51,621
Segment assets | 1,587,540 | 1,395,096 | 1,306,089
Long-lived assets | 384,477 | 321,000 | 280,684
Expenditures for long-lived assets | 170,647 | 152,906 | 113,594
Equity method investments | ¥ 271,682 | ¥ 249,481 | ¥ 248,388

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