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Subsequent Events (Narrative) (Detail) - Subsequent event - JPY (¥)
¥ / shares in Units, ¥ in Millions
May 15, 2024
Jun. 28, 2024
Jun. 27, 2024
Subsequent Event [Line Items]      
Aggregated number of shares allowed for repurchase (in shares) 80,000,000    
Aggregate amount of shares allowed for repurchase ¥ 100,000    
Common stock      
Subsequent Event [Line Items]      
Dividends payable (in JPY per share)     ¥ 20.5
Dividends payable, total amount   ¥ 240,938  
Shares authorized to be repurchased as % of total shares outstanding 0.70%