v3.26.1
Financial Instruments - Schedule of Interest Rate and Currency Hedging Instruments (Details) - Interest risk - Derivative hedging instruments - Cross currency interest rate swaps - JPY (¥)
¥ in Millions
Mar. 31, 2026
Mar. 31, 2025
Disclosure of detailed information about hedging instruments [line items]    
Contract amount ¥ 829,089 ¥ 1,103,099
Hedging instrument, liabilities 156,818 70,291
Contract amount to be settled in more than one year    
Disclosure of detailed information about hedging instruments [line items]    
Contract amount ¥ 814,089 ¥ 829,089