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Investment in Operating Leases - Additional Information (Detail) (JPY ¥) In Millions, unless otherwise specified	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Schedule of Operating Leases [Line Items]
Gains on sales of operating lease assets other than real estate	¥ 17,820	¥ 14,032	¥ 14,721
Maximum
Schedule of Operating Leases [Line Items]
Operating lease contracts, non- cancelable lease terms	23 years

X

- Definition

Operating Lease Expiration Period

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

X

- Details

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Namespace Prefix:	ix_
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X

- Definition

The net gain (loss) arising from the lessor's sale of assets held- or available-for-lease under contractual arrangements classified as operating leases.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 20

-Section 40

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=6453862&loc=d3e41205-112714



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 30

-Section 40

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=6455249&loc=d3e44908-112734



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 20

-Section 40

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6453862&loc=d3e41188-112714

+ Details

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