v3.26.1
Derivative Financial Instruments and Hedging - Additional Information (Detail) - Cash Flow Hedging [Member] - JPY (¥)
¥ in Millions
12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Derivative Instruments, Gain (Loss) [Line Items]      
Derivative instruments, gain (loss) reclassified from accumulated OCI into income, effective portion, net ¥ 2,062 ¥ (8,866) ¥ 2,947
Net derivative gain (loss) included in other comprehensive income (loss) reclassified into Earnings within next 12 months ¥ 163