XML 134 R121.htm IDEA: XBRL DOCUMENT
v3.23.2

Investment in Securities (Summary of Roll-forward of Allowance for Credit Losses) (Detail) - JPY (¥) ¥ in Millions | 12 Months Ended
--- | ---
Mar. 31, 2023 | Mar. 31, 2022 | Mar. 31, 2021
Accounts And Financing Receivable For Credit Losses [Line Items] |  |  |  |
Beginning | ¥ 153 | ¥ 120 | ¥ 0 |
Additions to the allowance for credit losses on available-for-sale debt securities for which credit losses were not previously recorded |  | 21 | 120 | [1]
Additional increases (decreases) to the allowance for credit losses on AFS debt securities that had an allowance recorded in a previous period, net | (21) |  |  |
Increase (Decrease) from the effects of changes in foreign exchange rates | 12 | 12 |  |
Ending | 144 | 153 | 120 |
Foreign municipal bond securities |  |  |  |
Accounts And Financing Receivable For Credit Losses [Line Items] |  |  |  |
Beginning | 132 | 120 | 0 |
Additions to the allowance for credit losses on available-for-sale debt securities for which credit losses were not previously recorded |  | 0 | 120 | [1]
Additional increases (decreases) to the allowance for credit losses on AFS debt securities that had an allowance recorded in a previous period, net | 0 |  |  |
Increase (Decrease) from the effects of changes in foreign exchange rates | 12 | 12 |  |
Ending | 144 | 132 | 120 |
Japanese other asset- backed securities and debt securities |  |  |  |
Accounts And Financing Receivable For Credit Losses [Line Items] |  |  |  |
Beginning | 21 | 0 |  |
Additions to the allowance for credit losses on available-for-sale debt securities for which credit losses were not previously recorded |  | 21 |  |
Additional increases (decreases) to the allowance for credit losses on AFS debt securities that had an allowance recorded in a previous period, net | (21) |  |  |
Increase (Decrease) from the effects of changes in foreign exchange rates | 0 | 0 |  |
Ending | ¥ 0 | ¥ 21 | ¥ 0 |
[1] | An increase from the effects of changes in foreign exchange rates of ¥3 million was included in additions to the allowance for credit losses on available-for-sale debt securities for fiscal 2021.

X
- Definition Accounts and financing receivable allowance allowance for credit losses increase decrease. + References No definition available. + Details
Name: | ck0001070304_AccountsAndFinancingReceivableAllowanceAllowanceForCreditLossesIncreaseDecrease
Namespace Prefix: | ck0001070304_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Accounts and financing receivable allowance allowance for credit losses increase due to losses previously not recored. + References No definition available. + Details
Name: | ck0001070304_AccountsAndFinancingReceivableAllowanceAllowanceForCreditLossesIncreaseDueToLossesPreviouslyNotRecored
Namespace Prefix: | ck0001070304_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Accounts and financing receivable allowance for credit losses increase decrease from the effects of changes in foreign exchange rates. + References No definition available. + Details
Name: | ck0001070304_AccountsAndFinancingReceivableAllowanceForCreditLossesIncreaseDecreaseFromTheEffectsOfChangesInForeignExchangeRates
Namespace Prefix: | ck0001070304_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Accounts And Financing Receivable For Credit Losses. + References No definition available. + Details
Name: | ck0001070304_AccountsAndFinancingReceivableForCreditLossesLineItems
Namespace Prefix: | ck0001070304_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of allowance for credit loss of accounts and financing receivables. Includes, but is not limited to, notes and loan receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI https://asc.fasb.org/extlink&oid=123577603&loc=d3e5074-111524 + Details
Name: | us-gaap_AccountsAndFinancingReceivableAllowanceForCreditLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=ck0001070304_ForeignMunicipalBondSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=ck0001070304_JapaneseOtherAssetBackedSecuritiesAndDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |