Acquisitions and Divestitures - Other Intangible Assets Recognized in Acquisition (Detail) - DHC Corporation ¥ in Millions	12 Months Ended
Mar. 31, 2024 JPY (¥)
Business Acquisition [Line Items]
Intangible assets that have indefinite useful lives	¥ 77,721
Intangibles subject to amortization	27,189
Acquired intangibles recorded at fair value	104,910
License
Business Acquisition [Line Items]
Intangibles subject to amortization	¥ 15,976
Weighted average amortization period	15 years
Customer Relationships
Business Acquisition [Line Items]
Intangibles subject to amortization	¥ 11,213
Weighted average amortization period	16 years
Trade Names
Business Acquisition [Line Items]
Intangible assets that have indefinite useful lives	¥ 77,721

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.

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