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Leases - Lessee: Supplemental Cash Flow Information (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2021
Schedule Of Cash Flow Information Related To Lease [Abstract]
Operating Leases, Cash flows from operating activities	¥ 50,369	¥ 47,321	¥ 41,680
Operating Leases, Cash flows from financing activities	0	0	0
Operating Leases, Right-of-use assets obtained in exchange for lease liabilities	39,823	37,816	55,344
Finance Leases, Cash flows from operating activities	150	106	131
Finance Leases, Cash flows from financing activities	781	878	674
Finance Leases, Right-of-use assets obtained in exchange for lease liabilities:	¥ 93	¥ 278	¥ 228

X

- Definition

Cash flow from financing activities operating lease

+ References

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- References

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X

- Definition

Amount of interest paid on finance lease liability.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (g)(1)
-URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918686-209980

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-Name Accounting Standards Codification
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-Section 45
-Paragraph 5
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-URI https://asc.fasb.org/extlink&oid=123391704&loc=SL77918643-209977

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X

- Definition

Amount of cash outflow for principal payment on finance lease.

+ References

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-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
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- Definition

Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
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- Definition

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Amount of increase in right-of-use asset obtained in exchange for operating lease liability.

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