The amount of contractual undiscounted cash flows in relation to bank borrowings. [Refer: Borrowings]

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The amount of bonds issued by the entity.

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

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No definition available.

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The nominal or face amount of a financial instrument, used to calculate payments made on that instrument.

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The cash outflow for repayments of non-current borrowings. [Refer: Borrowings]

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The amount of undrawn borrowing facilities that may be available for future operating activities and to settle capital commitments. [Refer: Capital commitments]

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Borrowings Maturity, Term

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Bonds and Loans - Narrative (Details) ¥ in Millions, $ in Millions	Jul. 03, 2026 USD ($)	Mar. 31, 2026 JPY (¥)	Jun. 23, 2025 USD ($)	Apr. 25, 2025 JPY (¥)	Mar. 31, 2025 JPY (¥)	Mar. 31, 2025 USD ($)	Jun. 25, 2024 JPY (¥)	Apr. 25, 2024 JPY (¥)	Mar. 31, 2026 USD ($)	Jul. 02, 2025 USD ($)	Jun. 12, 2025 JPY (¥)	Mar. 31, 2025 USD ($)	Oct. 06, 2024 JPY (¥)	Oct. 03, 2024 JPY (¥)	Jul. 12, 2024 USD ($)	Jul. 05, 2024 USD ($)	Sep. 30, 2019 JPY (¥)
Disclosure of detailed information about borrowings [line items]
Bonds		¥ 4,656,812			¥ 4,190,632
Borrowing availability		350,000							$ 2,100								¥ 700,000
Bilateral Loans
Disclosure of detailed information about borrowings [line items]
Repayments of non-current borrowings	$ 500	75,000		¥ 10,000				¥ 50,000
Notional		60,000						¥ 50,000
Principal amount in contractual currency (millions)		185,000
2024 Hybrid bonds (subordinated bonds)
Disclosure of detailed information about borrowings [line items]
Notional		460,000					¥ 460,000
Borrowings maturity, term							60 years
Bonds		458,443			457,983
Principal amount in contractual currency (millions)					460,000
2024 USD Unsecured Senior Notes – fixed rate
Disclosure of detailed information about borrowings [line items]
Notional \| $									3,000							$ 3,000
Bonds		473,755			442,175
Unsecured Senior Notes Assumed in Shire Acquisition
Disclosure of detailed information about borrowings [line items]
Notional \| $									1,500						$ 1,500
Bonds		237,743			219,033
2024 Syndicated Hybrid Loans (Subordinated Loans)
Disclosure of detailed information about borrowings [line items]
Notional														¥ 40,000
Principal amount in contractual currency (millions)		40,000
2019 Hybrid Subordinated Bonds
Disclosure of detailed information about borrowings [line items]
Notional													¥ 500,000
JPY Syndicated Loans
Disclosure of detailed information about borrowings [line items]
Repayments of non-current borrowings					313,500
USD Syndicated Loans
Disclosure of detailed information about borrowings [line items]
Repayments of non-current borrowings \| $						$ 1,500
USD 500 million, short term loan
Disclosure of detailed information about borrowings [line items]
Notional \| $												$ 500
Commercial Paper
Disclosure of detailed information about borrowings [line items]
Notional					270,000
Bonds		0			270,000
2025 JPY Unsecured-Senior Bonds – fixed rate
Disclosure of detailed information about borrowings [line items]
Notional		184,000									¥ 184,000
Bonds		183,609			0
2025 USD Unsecured Guaranteed Senior Notes – fixed rate
Disclosure of detailed information about borrowings [line items]
Repayments of non-current borrowings \| $			$ 800
Notional \| $									$ 2,400	$ 2,400
Bonds		¥ 379,418			¥ 0
2025 USD Bilateral Loan
Disclosure of detailed information about borrowings [line items]
Principal amount in contractual currency (millions) \| $												$ 500
Commitment Facilities
Disclosure of detailed information about borrowings [line items]
Borrowings maturity, term		5 years