Financial income and expense - Summary of financial income and expenses (Parenthetical) (Detail) ¥ in Millions, $ in Millions	12 Months Ended
Mar. 31, 2022 JPY (¥)	Mar. 31, 2022 USD ($)	Mar. 31, 2021 JPY (¥)	Mar. 31, 2021 USD ($)
Spotify Technology S A [Member]
Disclosure of offsetting of financial liabilities [line items]
Pre-tax unrealized gain, net of costs resulted from revaluation of the Spotify shares owned	¥ (45,017)	$ (395)	¥ 51,310	$ 480

The gains (losses) on financial assets mandatorily measured at fair value through profit or loss in accordance with IFRS 9. [Refer: Financial assets at fair value through profit or loss, mandatorily measured at fair value; Gains (losses) on financial assets at fair value through profit or loss; Financial liabilities]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2021-01-01
-Paragraph 20
-Subparagraph a
-Clause i
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2021-en-r&anchor=para_20_a_i&doctype=Standard
-URIDate 2021-03-24

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