Sales Revenue - Summary of Information Regarding Receivables from Contracts with Customers and Contract Liabilities (Detail) - JPY (¥) ¥ in Millions	Mar. 31, 2026	Mar. 31, 2025
Receivables from contracts with customers: [abstract]
Trade receivables	¥ 918,792	¥ 888,774
Contract liabilities:
Other current liabilities	412,227	411,941
Other noncurrent liabilities	¥ 364,505	¥ 329,298

No definition available.

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- Definition

The amount of current contract liabilities. [Refer: Contract liabilities]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-URIDate 2025-03-27

+ Details

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- Definition

The amount of non-current contract liabilities. [Refer: Contract liabilities]

+ References

+ Details

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- References

No definition available.

+ Details

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- Definition

The amount due from customers for goods and services sold.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Note Effective 2027-01-01
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+ Details

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