XML 84 R81.htm IDEA: XBRL DOCUMENT
v3.25.3

Credit Quality of Financial Assets and the Allowance for Credit Losses - Summary of Modifications of Financing Receivables (Detail) - JPY (¥) ¥ in Millions | 6 Months Ended
--- | ---
Sep. 30, 2025 | Sep. 30, 2024
Interest rate reduction |  |
Financing Receivable, Modifications [Line Items] |  |
Amortized cost basis | ¥ 2,414 |
% of total class of financing receivable | 0.00% |
Interest rate reduction | Consumer borrowers |  |
Financing Receivable, Modifications [Line Items] |  |
Amortized cost basis | ¥ 0 |
% of total class of financing receivable | 0.00% |
Interest rate reduction | Consumer borrowers | Other |  |
Financing Receivable, Modifications [Line Items] |  |
Amortized cost basis | ¥ 0 |
% of total class of financing receivable | 0.00% |
Interest rate reduction | Corporate borrowers |  |
Financing Receivable, Modifications [Line Items] |  |
Amortized cost basis | ¥ 2,414 |
% of total class of financing receivable | 0.10% |
Interest rate reduction | Corporate borrowers | Other than non-recourse loans |  |
Financing Receivable, Modifications [Line Items] |  |
Amortized cost basis | ¥ 2,414 |
% of total class of financing receivable | 0.20% |
Interest rate reduction | Corporate borrowers | Other than non-recourse loans | Real estate companies | Japan |  |
Financing Receivable, Modifications [Line Items] |  |
Amortized cost basis | ¥ 0 |
% of total class of financing receivable | 0.00% |
Interest rate reduction | Corporate borrowers | Other than non-recourse loans | Commercial, industrial and other companies | Japan |  |
Financing Receivable, Modifications [Line Items] |  |
Amortized cost basis | ¥ 0 |
% of total class of financing receivable | 0.00% |
Interest rate reduction | Corporate borrowers | Other than non-recourse loans | Commercial, industrial and other companies | Overseas |  |
Financing Receivable, Modifications [Line Items] |  |
Amortized cost basis | ¥ 2,414 |
% of total class of financing receivable | 0.40% |
Interest rate reduction | Net investment in leases |  |
Financing Receivable, Modifications [Line Items] |  |
Amortized cost basis | ¥ 0 |
% of total class of financing receivable | 0.00% |
Interest rate reduction | Net investment in leases | Japan |  |
Financing Receivable, Modifications [Line Items] |  |
Amortized cost basis | ¥ 0 |
% of total class of financing receivable | 0.00% |
Term extension |  |
Financing Receivable, Modifications [Line Items] |  |
Amortized cost basis | ¥ 8,417 | ¥ 2,810
% of total class of financing receivable | 0.20% | 0.10%
Term extension | Consumer borrowers |  |
Financing Receivable, Modifications [Line Items] |  |
Amortized cost basis | ¥ 10 | ¥ 44
% of total class of financing receivable | 0.00% | 0.00%
Term extension | Consumer borrowers | Other |  |
Financing Receivable, Modifications [Line Items] |  |
Amortized cost basis | ¥ 10 | ¥ 44
% of total class of financing receivable | 0.00% | 0.10%
Term extension | Corporate borrowers |  |
Financing Receivable, Modifications [Line Items] |  |
Amortized cost basis | ¥ 8,305 | ¥ 1,875
% of total class of financing receivable | 0.40% | 0.10%
Term extension | Corporate borrowers | Other than non-recourse loans |  |
Financing Receivable, Modifications [Line Items] |  |
Amortized cost basis | ¥ 8,305 | ¥ 1,875
% of total class of financing receivable | 0.60% | 0.20%
Term extension | Corporate borrowers | Other than non-recourse loans | Real estate companies | Japan |  |
Financing Receivable, Modifications [Line Items] |  |
Amortized cost basis | ¥ 289 | ¥ 1,345
% of total class of financing receivable | 0.10% | 0.40%
Term extension | Corporate borrowers | Other than non-recourse loans | Commercial, industrial and other companies | Japan |  |
Financing Receivable, Modifications [Line Items] |  |
Amortized cost basis | ¥ 433 | ¥ 530
% of total class of financing receivable | 0.20% | 0.30%
Term extension | Corporate borrowers | Other than non-recourse loans | Commercial, industrial and other companies | Overseas |  |
Financing Receivable, Modifications [Line Items] |  |
Amortized cost basis | ¥ 7,583 | ¥ 0
% of total class of financing receivable | 1.40% | 0.00%
Term extension | Loans to Equity Method Investees |  |
Financing Receivable, Modifications [Line Items] |  |
Amortized cost basis |  | ¥ 891
% of total class of financing receivable |  | 0.60%
Term extension | Net investment in leases |  |
Financing Receivable, Modifications [Line Items] |  |
Amortized cost basis | ¥ 102 |
% of total class of financing receivable | 0.00% |
Term extension | Net investment in leases | Japan |  |
Financing Receivable, Modifications [Line Items] |  |
Amortized cost basis | ¥ 102 |
% of total class of financing receivable | 0.00% |
Principal forgiveness |  |
Financing Receivable, Modifications [Line Items] |  |
Amortized cost basis | ¥ 12 | ¥ 11
% of total class of financing receivable | 0.00% | 0.00%
Principal forgiveness | Consumer borrowers |  |
Financing Receivable, Modifications [Line Items] |  |
Amortized cost basis | ¥ 6 | ¥ 0
% of total class of financing receivable | 0.00% | 0.00%
Principal forgiveness | Consumer borrowers | Other |  |
Financing Receivable, Modifications [Line Items] |  |
Amortized cost basis | ¥ 0 | ¥ 0
% of total class of financing receivable | 0.00% | 0.00%
Principal forgiveness | Corporate borrowers |  |
Financing Receivable, Modifications [Line Items] |  |
Amortized cost basis | ¥ 6 | ¥ 11
% of total class of financing receivable | 0.00% | 0.00%
Principal forgiveness | Corporate borrowers | Other than non-recourse loans |  |
Financing Receivable, Modifications [Line Items] |  |
Amortized cost basis | ¥ 6 | ¥ 11
% of total class of financing receivable | 0.00% | 0.00%
Principal forgiveness | Corporate borrowers | Other than non-recourse loans | Real estate companies | Japan |  |
Financing Receivable, Modifications [Line Items] |  |
Amortized cost basis | ¥ 0 | ¥ 0
% of total class of financing receivable | 0.00% | 0.00%
Principal forgiveness | Corporate borrowers | Other than non-recourse loans | Commercial, industrial and other companies | Japan |  |
Financing Receivable, Modifications [Line Items] |  |
Amortized cost basis | ¥ 0 | ¥ 0
% of total class of financing receivable | 0.00% | 0.00%
Principal forgiveness | Corporate borrowers | Other than non-recourse loans | Commercial, industrial and other companies | Overseas |  |
Financing Receivable, Modifications [Line Items] |  |
Amortized cost basis | ¥ 6 | ¥ 11
% of total class of financing receivable | 0.00% | 0.00%
Principal forgiveness | Loans to Equity Method Investees |  |
Financing Receivable, Modifications [Line Items] |  |
Amortized cost basis |  | ¥ 0
% of total class of financing receivable |  | 0.00%
Principal forgiveness | Net investment in leases |  |
Financing Receivable, Modifications [Line Items] |  |
Amortized cost basis | ¥ 0 |
% of total class of financing receivable | 0.00% |
Principal forgiveness | Net investment in leases | Japan |  |
Financing Receivable, Modifications [Line Items] |  |
Amortized cost basis | ¥ 0 |
% of total class of financing receivable | 0.00% |
Combination - interest rate reduction and term extension |  |
Financing Receivable, Modifications [Line Items] |  |
Amortized cost basis | ¥ 49 | ¥ 5,001
% of total class of financing receivable | 0.00% | 0.10%
Combination - interest rate reduction and term extension | Consumer borrowers |  |
Financing Receivable, Modifications [Line Items] |  |
Amortized cost basis | ¥ 0 | ¥ 106
% of total class of financing receivable | 0.00% | 0.00%
Combination - interest rate reduction and term extension | Consumer borrowers | Other |  |
Financing Receivable, Modifications [Line Items] |  |
Amortized cost basis | ¥ 0 | ¥ 106
% of total class of financing receivable | 0.00% | 0.20%
Combination - interest rate reduction and term extension | Corporate borrowers |  |
Financing Receivable, Modifications [Line Items] |  |
Amortized cost basis | ¥ 49 | ¥ 4,895
% of total class of financing receivable | 0.00% | 0.30%
Combination - interest rate reduction and term extension | Corporate borrowers | Other than non-recourse loans |  |
Financing Receivable, Modifications [Line Items] |  |
Amortized cost basis | ¥ 49 | ¥ 4,895
% of total class of financing receivable | 0.00% | 0.40%
Combination - interest rate reduction and term extension | Corporate borrowers | Other than non-recourse loans | Real estate companies | Japan |  |
Financing Receivable, Modifications [Line Items] |  |
Amortized cost basis | ¥ 0 | ¥ 0
% of total class of financing receivable | 0.00% | 0.00%
Combination - interest rate reduction and term extension | Corporate borrowers | Other than non-recourse loans | Commercial, industrial and other companies | Japan |  |
Financing Receivable, Modifications [Line Items] |  |
Amortized cost basis | ¥ 0 | ¥ 0
% of total class of financing receivable | 0.00% | 0.00%
Combination - interest rate reduction and term extension | Corporate borrowers | Other than non-recourse loans | Commercial, industrial and other companies | Overseas |  |
Financing Receivable, Modifications [Line Items] |  |
Amortized cost basis | ¥ 49 | ¥ 4,895
% of total class of financing receivable | 0.00% | 0.90%
Combination - interest rate reduction and term extension | Loans to Equity Method Investees |  |
Financing Receivable, Modifications [Line Items] |  |
Amortized cost basis |  | ¥ 0
% of total class of financing receivable |  | 0.00%
Combination - interest rate reduction and term extension | Net investment in leases |  |
Financing Receivable, Modifications [Line Items] |  |
Amortized cost basis | ¥ 0 |
% of total class of financing receivable | 0.00% |
Combination - interest rate reduction and term extension | Net investment in leases | Japan |  |
Financing Receivable, Modifications [Line Items] |  |
Amortized cost basis | ¥ 0 |
% of total class of financing receivable | 0.00% |
Combination - interest rate reduction and principal forgiveness |  |
Financing Receivable, Modifications [Line Items] |  |
Amortized cost basis | ¥ 1,201 |
% of total class of financing receivable | 0.00% |
Combination - interest rate reduction and principal forgiveness | Consumer borrowers |  |
Financing Receivable, Modifications [Line Items] |  |
Amortized cost basis | ¥ 0 |
% of total class of financing receivable | 0.00% |
Combination - interest rate reduction and principal forgiveness | Consumer borrowers | Other |  |
Financing Receivable, Modifications [Line Items] |  |
Amortized cost basis | ¥ 0 |
% of total class of financing receivable | 0.00% |
Combination - interest rate reduction and principal forgiveness | Corporate borrowers |  |
Financing Receivable, Modifications [Line Items] |  |
Amortized cost basis | ¥ 1,201 |
% of total class of financing receivable | 0.10% |
Combination - interest rate reduction and principal forgiveness | Corporate borrowers | Other than non-recourse loans |  |
Financing Receivable, Modifications [Line Items] |  |
Amortized cost basis | ¥ 1,201 |
% of total class of financing receivable | 0.10% |
Combination - interest rate reduction and principal forgiveness | Corporate borrowers | Other than non-recourse loans | Real estate companies | Japan |  |
Financing Receivable, Modifications [Line Items] |  |
Amortized cost basis | ¥ 0 |
% of total class of financing receivable | 0.00% |
Combination - interest rate reduction and principal forgiveness | Corporate borrowers | Other than non-recourse loans | Commercial, industrial and other companies | Japan |  |
Financing Receivable, Modifications [Line Items] |  |
Amortized cost basis | ¥ 0 |
% of total class of financing receivable | 0.00% |
Combination - interest rate reduction and principal forgiveness | Corporate borrowers | Other than non-recourse loans | Commercial, industrial and other companies | Overseas |  |
Financing Receivable, Modifications [Line Items] |  |
Amortized cost basis | ¥ 1,201 |
% of total class of financing receivable | 0.20% |
Combination - interest rate reduction and principal forgiveness | Net investment in leases |  |
Financing Receivable, Modifications [Line Items] |  |
Amortized cost basis | ¥ 0 |
% of total class of financing receivable | 0.00% |
Combination - interest rate reduction and principal forgiveness | Net investment in leases | Japan |  |
Financing Receivable, Modifications [Line Items] |  |
Amortized cost basis | ¥ 0 |
% of total class of financing receivable | 0.00% |

X
- Definition Percentage of financing receivable modified during period for debtor experiencing financial difficulty to total financing receivables. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 12A -Publisher FASB -URI https://asc.fasb.org/1943274/2147481933/310-10-55-12A Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 42 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-42 + Details
Name: | us-gaap_FinancingReceivableModificationToTotalFinancingReceivablesPercent
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 12A -Publisher FASB -URI https://asc.fasb.org/1943274/2147481933/310-10-55-12A Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 34 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-34 Reference 3: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 33 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-33 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 42 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-42 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 42 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-42 + Details
Name: | us-gaap_FinancingReceivableModificationsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amortized cost of financing receivable modified during period for debtor experiencing financial difficulty. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 12A -Publisher FASB -URI https://asc.fasb.org/1943274/2147481933/310-10-55-12A Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 33 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-33 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 42 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-42 + Details
Name: | us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_LoanRestructuringModificationAxis=us-gaap_ContractualInterestRateReductionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ConsumerPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=ck0001070304_OtherConsumerLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=ck0001070304_OtherThanNonRecourseLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ck0001070304_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableOneAxis=ck0001070304_CorporateRealEstateCompaniesLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=country_JP
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ck0001070304_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableOneAxis=ck0001070304_CommercialIndustrialAndOtherCompaniesLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=ck0001070304_OverseasMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=ck0001070304_NetInvestmentInLeasesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LoanRestructuringModificationAxis=us-gaap_ExtendedMaturityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=ck0001070304_LoansToEquityMethodInvesteesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LoanRestructuringModificationAxis=us-gaap_PrincipalForgivenessMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LoanRestructuringModificationAxis=us-gaap_ExtendedMaturityAndInterestRateReductionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LoanRestructuringModificationAxis=ck0001070304_ExtendedInterestRateReductionAndPrincipalForgivenessMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |