Right of Use Assets and Lease Liabilities - Summary of Gains and Losses on Lessee's Leases (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2023
Disclosure of quantitative information about lease costs [Line items]
Depreciation of right of use assets	¥ 100,838	¥ 121,698	¥ 84,191
Interest expense on lease liabilities	4,331	6,152	5,429
Short-term leases	117,834	103,544	97,025
Total	223,003	231,394	186,645
Land [Member]
Disclosure of quantitative information about lease costs [Line items]
Depreciation of right of use assets	5,094	9,699	5,217
Buildings [Member]
Disclosure of quantitative information about lease costs [Line items]
Depreciation of right of use assets	52,178	69,962	42,408
Other [Member]
Disclosure of quantitative information about lease costs [Line items]
Depreciation of right of use assets	¥ 43,566	¥ 42,038	¥ 36,566

The amount of depreciation of right-of-use assets. [Refer: Depreciation and amortisation expense; Right-of-use assets]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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The amount of the expense relating to short-term leases accounted for applying paragraph 6 of IFRS 16. This expense need not include the expense relating to leases with a lease term of one month or less. Short-term lease is a lease that, at the commencement date, has a lease term of 12 months or less. A lease that contains a purchase option is not a short-term lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2024-01-01
-Paragraph 53
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The amount of interest expense on lease liabilities. [Refer: Lease liabilities]

+ References

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Lease cost.

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