Leases - Lessor: Net Investment in Leases (Detail) - JPY (¥) ¥ in Millions	Mar. 31, 2020	Mar. 31, 2019
Schedule Of Net Investment In Direct Financing And Sales Type Lease [Abstract]
Lease receivables	¥ 1,049,409
Unguaranteed residual value	27,868
Initial direct costs	3,687
Total	¥ 1,080,964	¥ 0

Direct Financing And Sales Type Lease Initial Direct Costs

No definition available.

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- Definition

Direct financing and sales type lease unguaranteed residual value

+ References

No definition available.

+ Details

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- Definition

Schedule Of Net Investment In Direct Financing And Sales Type Lease

+ References

No definition available.

+ Details

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- Definition

Amount of net investment in sales-type and direct financing lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 30
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=77888421&loc=SL77919306-209978

+ Details

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Period Type:	instant

- Definition

Present value of lease payments not yet received by lessor and amount expected to be derived from underlying asset, following end of lease term guaranteed by lessee or other third party unrelated to lessor, from sales-type and direct financing leases.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 30
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=119202524&loc=SL77919391-209981

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 30
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=119202524&loc=SL77919379-209981

+ Details

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