v3.26.1
Earnings per share - Summary Of Weighted Average Number Of Common Shares Outstanding (Details) - shares
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Weighted average common shares outstanding [Line Items]      
Number of shares, Common shares issued at the beginning of the period 742,591,501 751,949,461  
Number of shares, Treasury stocks (3,082,276) (3,427,497)  
Number of shares, Acquisition and retirement of treasury stock etc. (8,515,377) (9,359,809)  
Number of shares, Disposal of treasury stock 196 347,070  
Accumulated number of shares outstanding during period, Common shares issued at the beginning of the period 271,045,897,865 275,213,502,726  
Accumulated number of shares outstanding during period, Treasury stocks (1,125,030,740) (1,254,463,902)  
Accumulated number of shares outstanding during period, Acquisition and retirement of treasury stock etc. (2,115,328,855) (2,742,480,364)  
Accumulated number of shares outstanding during period, Disposal of treasury stock 31,208 89,415,280  
Accumulated number of shares outstanding during period 267,805,569,478 271,305,973,740  
Weighted average number of common shares outstanding 733,713,889 741,273,152 735,000,000