XML 135 R122.htm IDEA: XBRL DOCUMENT
v3.23.2

Investment in Securities (Summary of Roll-forward of Allowance for Credit Losses) (Parenthetical) (Detail) ¥ in Millions | 12 Months Ended
--- | ---
Mar. 31, 2021 JPY (¥)
Investments, Debt and Equity Securities [Abstract] |
Increase from the effects of changes in foreign exchange rates | ¥ 3

X
- Definition Debt Securities, Available-for-sale, Allowance for credit loss effects of changes in foreign exchange rates. + References No definition available. + Details
Name: | ck0001070304_DebtSecuritiesAvailableForSaleAllowanceForCreditLossEffectsOfChangesInForeignExchangeRates
Namespace Prefix: | ck0001070304_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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