XML 123 R117.htm IDEA: XBRL DOCUMENT v3.23.3

Income and Expenses Relating to Life Insurance Operations - Gains or Losses Relating to Variable Annuity and Variable Life Insurance Contracts (Detail) - JPY (¥) ¥ in Millions	3 Months Ended		6 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Life insurance premiums and related investment income
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]			Unrealized Gains Loss On Derivative Instruments
Variable Annuity and Variable Life Insurance Contracts
Life insurance premiums and related investment income
Net realized and unrealized gains or losses from investment assets	¥ (1,590)	¥ (1,259)	¥ 15,512	¥ (11,820)
Net gains or losses from derivative contracts	(242)	(1)	(1,971)	252
Life insurance costs
Changes in the fair value of the policy liabilities and policy account balances	(10,501)	(10,508)	(3,727)	(28,645)
Insurance costs recognized for insurance and annuity payouts as a result of insured events	7,473	8,304	13,848	16,966
Changes in the fair value of the reinsurance contracts	206	30	1,006	(488)
Variable Annuity and Variable Life Insurance Contracts | Futures
Life insurance premiums and related investment income
Net gains or losses from derivative contracts	(150)	173	(1,557)	852
Variable Annuity and Variable Life Insurance Contracts | Foreign exchange contracts
Life insurance premiums and related investment income
Net gains or losses from derivative contracts	¥ (92)	¥ (174)	¥ (414)	¥ (600)

X

- Definition

Amount of increase (decrease) in the fair value of reinsurance contracts in the income statement.

+ References

No definition available.

+ Details

Name:	ck0001070304_ChangesInFairValueOfReinsuranceContracts
Namespace Prefix:	ck0001070304_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of increase (decrease) in the fair value of variable annuity and variable life insurance contracts.

+ References

No definition available.

+ Details

Name:	ck0001070304_ChangesInFairValueOfVariableAnnuityAndVariableLifeInsuranceContracts
Namespace Prefix:	ck0001070304_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Life Insurance Costs [Abstract]

+ References

No definition available.

+ Details

Name:	ck0001070304_LifeInsuranceCostsAbstract
Namespace Prefix:	ck0001070304_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Life Insurance Premiums and Related Investment Income [Abstract]

+ References

No definition available.

+ Details

Name:	ck0001070304_LifeInsurancePremiumsAndRelatedInvestmentIncomeAbstract
Namespace Prefix:	ck0001070304_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount, after effect of policies assumed or ceded, of expense related to provision for policyholder benefits and costs incurred for variable annuity and variable life insurance contracts.

+ References

No definition available.

+ Details

Name:	ck0001070304_PolicyholderBenefitsAndClaimsIncurredRelatingToVariableAnnuityAndVariableLifeInsuranceContracts
Namespace Prefix:	ck0001070304_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4A
-Subparagraph (b)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480434/815-10-50-4A

+ Details

Name:	us-gaap_DerivativeGainLossOnDerivativeNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Indicates line item in statement of income or comprehensive income that includes gain (loss) from derivative.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4A
-Subparagraph (b)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480434/815-10-50-4A

+ Details

Name:	us-gaap_DerivativeGainLossStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration
Namespace Prefix:	us-gaap_
Data Type:	enum2:enumerationSetItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of unrealized and realized gain (loss) on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04(3)(d))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483586/944-220-S99-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 321
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479536/321-10-50-4

+ Details

Name:	us-gaap_EquitySecuritiesFvNiGainLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

Name:	srt_ProductOrServiceAxis=ck0001070304_VariableAnnuityAndVariableLifeInsuranceContractsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_FutureMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_ForeignExchangeContractMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: