v3.26.1
Sales Revenue - Summary of Assets Recognized Costs Obtain a Contract With Customer (Detail) - JPY (¥)
¥ in Millions
Mar. 31, 2026
Mar. 31, 2025
Disclosure - Sales Revenue - Summary of Assets Recognized Costs Obtain a Contract With Customer [Abstract]    
Assets recognized from the costs to obtain a contract with a customer ¥ 223,973 ¥ 192,532