Reconciliation of the differences between basic and diluted EPS - Summary of Potential Shares of Common Stock (Detail) - JPY (¥) ¥ / shares in Units, shares in Thousands, ¥ in Millions	12 Months Ended
Mar. 31, 2022	Mar. 31, 2021
Earnings per share [abstract]
Net income attributable to Sony Group Corporation's stockholders	¥ 882,178	¥ 1,029,610
Adjustment amount to net income attributable to Sony Group Corporation's stockholders for diluted EPS computation
Zero Coupon Convertible Bonds	163	385
Net income attributable to Sony Group Corporation's stockholders for diluted EPS computation	¥ 882,341	¥ 1,029,995
Weighted-average shares outstanding for basic EPS computation	1,239,299	1,230,480
Stock acquisition rights	5,470	4,474
Zero Coupon Convertible Bonds	6,491	15,392
Weighted-average shares for diluted EPS computation	1,251,260	1,250,346
Basic EPS	¥ 711.84	¥ 836.75
Diluted EPS	¥ 705.16	¥ 823.77

The weighted average number of ordinary shares outstanding plus the weighted average number of ordinary shares that would be issued on the conversion of all the dilutive potential ordinary shares into ordinary shares. [Refer: Ordinary shares [member]; Weighted average [member]]

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The amount of profit (loss) attributable to ordinary equity holders of the parent entity (the numerator) divided by the weighted average number of ordinary shares outstanding during the period (the denominator).

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The amount of profit (loss) attributable to ordinary equity holders of the parent entity (the numerator), divided by the weighted average number of ordinary shares outstanding during the period (the denominator), both adjusted for the effects of all dilutive potential ordinary shares. [Refer: Ordinary shares [member]; Weighted average [member]]

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The number of dilutive potential ordinary shares that relate to the assumed conversion of the entity's convertible instruments.

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The profit (loss) attributable to ordinary equity holders of the parent entity. [Refer: Profit (loss)]

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Adjustment amount to net income attributable to Sony Group Corporation's stockholders for diluted EPS computation.

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