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Acquisitions and Divestitures - Other Intangible Assets Recognized in Acquisition (Detail) ¥ in Millions	12 Months Ended
	Mar. 31, 2023 JPY (¥)
License [Member]
Business Acquisition [Line Items]
Weighted average amortization period	15 years
DHC Corporation [Member]
Business Acquisition [Line Items]
Intangible assets that have indefinite useful lives	¥ 68,800
Intangibles subject to amortization	15,500
Acquired intangibles recorded at fair value	84,300
DHC Corporation [Member] | License [Member]
Business Acquisition [Line Items]
Intangibles subject to amortization	¥ 15,500
Weighted average amortization period	15 years
DHC Corporation [Member] | Trade Names [Member]
Business Acquisition [Line Items]
Intangible assets that have indefinite useful lives	¥ 68,800

X

- Definition

Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (a)(3)
-URI https://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Amount of assets, excluding financial assets and goodwill, that lack physical substance, having a projected indefinite period of benefit, acquired at the acquisition date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=128092470&loc=d3e4845-128472

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- Definition

Amount of intangible assets, excluding goodwill, acquired at the acquisition date.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 20
-Section 50
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- Definition

The amount of identifiable intangible assets recognized as of the acquisition date.

+ References

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-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 55
-Paragraph 37
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