XML 144 R141.htm IDEA: XBRL DOCUMENT
v3.25.3

Commitments, Guarantees and Contingent Liabilities (Amounts Due of Certain Computer Systems Operated and Maintained under Non-cancelable Contracts with Third-party Service Providers) (Detail) - JPY (¥) ¥ in Millions | Sep. 30, 2025 | Mar. 31, 2025
--- | --- | ---
Commitments and Contingencies Disclosure [Abstract] |  |
Within one year | ¥ 5,812 | ¥ 5,809
More than one year | 6,113 | 7,660
Total | ¥ 11,925 | ¥ 13,469

X
- Definition Contractual commitments future minimum payments due. + References No definition available. + Details
Name: | ck0001070304_ContractualCommitmentsFutureMinimumPaymentsDue
Namespace Prefix: | ck0001070304_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Contractual commitments future minimum payments due current. + References No definition available. + Details
Name: | ck0001070304_ContractualCommitmentsFutureMinimumPaymentsDueCurrent
Namespace Prefix: | ck0001070304_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Contractual commitments future minimum payments due thereafter. + References No definition available. + Details
Name: | ck0001070304_ContractualCommitmentsFutureMinimumPaymentsDueThereafter
Namespace Prefix: | ck0001070304_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration