v3.26.1
Earnings Per Share - Summary of Earnings (Loss) Per Share (Detail) - JPY (¥)
¥ / shares in Units, ¥ in Millions
12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Earnings per share [abstract]      
Profit (loss) for the year attributable to owners of the parent (millions of yen) ¥ (423,941) ¥ 835,837 ¥ 1,107,174
Weighted average number of common shares outstanding, basic 3,997,276,887 4,671,383,489 4,901,560,332
Basic earnings (loss) per share attributable to owners of the parent ¥ (106.06) ¥ 178.93 ¥ 225.88