XML 132 R119.htm IDEA: XBRL DOCUMENT
v3.23.2

Investment in Securities (Information About Impairment and Upward or Downward Adjustments Resulting From Observable Price Changes) (Detail) - Equity security - JPY (¥) ¥ in Millions | 12 Months Ended
--- | ---
Mar. 31, 2023 | Mar. 31, 2022
Schedule Of Gain Loss On Investments Held At Cost Balance Sheet and Income Statement Reported Amounts Summary [Line Items] |  |
Carrying value | ¥ 67,820 | ¥ 58,723
Accumulated impairments and downward adjustments | (14,062) | (13,880)
Accumulated upward adjustments | 1,742 | 401
Impairments and downward adjustments | (787) | (208)
Upward adjustments | ¥ 1,360 | ¥ 163

X
- Definition Equity Securities Accumulated Impairments And Downward Adjustments. + References No definition available. + Details
Name: | ck0001070304_EquitySecuritiesAccumulatedImpairmentsAndDownwardAdjustments
Namespace Prefix: | ck0001070304_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Equity Securities Accumulated Upward Adjustments. + References No definition available. + Details
Name: | ck0001070304_EquitySecuritiesAccumulatedUpwardAdjustments
Namespace Prefix: | ck0001070304_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Equity Securities Impairments And Downward Adjustments. + References No definition available. + Details
Name: | ck0001070304_EquitySecuritiesImpairmentsAndDownwardAdjustments
Namespace Prefix: | ck0001070304_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Equity Securities Measured At Alternative + References No definition available. + Details
Name: | ck0001070304_EquitySecuritiesMeasuredAtAlternative
Namespace Prefix: | ck0001070304_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Equity Securities Upward Adjustments. + References No definition available. + Details
Name: | ck0001070304_EquitySecuritiesUpwardAdjustments
Namespace Prefix: | ck0001070304_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Schedule Of Gain Loss On Investments Held At Cost Balance Sheet and Income Statement Reported Amounts Summary. + References No definition available. + Details
Name: | ck0001070304_ScheduleOfGainLossOnInvestmentsHeldAtCostBalanceSheetAndIncomeStatementReportedAmountsSummaryLineItems
Namespace Prefix: | ck0001070304_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_EquitySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |