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Deposits - Additional Information (Detail) (JPY ¥) In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Deposits From Banking Clients [Line Items]
Time deposits, including certificates of deposit issued in amounts of 10 million Yen or more	¥ 619,738	¥ 561,449

X

- Details

Name:	ix_DepositsFromBankingClientsLineItems
Namespace Prefix:	ix_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The aggregate amount of domestic and foreign time deposit liabilities (including certificates of deposits, individual retirement accounts and open accounts) in denominations of $100,000 or more.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 405

-Section 50

-Paragraph 1

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6479006&loc=d3e64164-112818



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Industry Guide

-Number 3

-Section V

-Paragraph A

-Subparagraph 4

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant