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Investment in Operating Leases - Additional Information (Detail) In Millions	12 Months Ended
	Mar. 31, 2011 USD ($)	Mar. 31, 2011 JPY (¥)	Mar. 31, 2010 JPY (¥)	Mar. 31, 2009 JPY (¥)
Schedule of Operating Leases [Line Items]
Gains on sales of operating lease assets other than real estate	$ 120	¥ 9,968	¥ 7,552	¥ 11,426
Operating lease contracts, non-cancelable lease terms	up to 20 years	up to 20 years

X

- Definition

Operating Lease Contracts, Noncancelable Lease Terms

+ Details

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- Definition

Schedule of Operating Leases [Line Items]

+ Details

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X

- Definition

The net gain or 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 Statement of Financial Accounting Standard (FAS)
-Number 13
-Paragraph 20, 21

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