v3.26.1
Share-based Payment - Significant Terms and Conditions of Stock Option Plan (Detail) - SMFG stock acquisition rights [member]
 12 Months Ended
Mar. 31, 2026
Disclosure of terms and conditions of share-based payment arrangement [Line Items]  
Title of grantees Directors, corporate auditors and executive officers of SMFG and SMBC
Exercise period Not exceeding 30 years from the date of allocation of stock acquisition rights [1]
Requisite service period One year from the date of the ordinary general meeting of shareholders of SMFG to the closing of the next ordinary general meeting of shareholders of SMFG
Method of settlement Common stock of SMFG
[1] A stock acquisition rights holder can exercise the rights from the day they are relieved of their positions either as a director, a corporate auditor or an executive officer (“Start of Exercise Date”) to 20 years from the Start of Exercise Date.