v3.26.1
Other income (Detail) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Other Income [Line Items]    
Net gains / (losses) from acquisitions and disposals of subsidiaries $ 1 $ 98
Net gains / (losses) from disposals of investments in associates and joint ventures 163 3
Share of net profits of associates and joint ventures 110 157
Total 274 257
Income from properties 20 12
Net gains / (losses) from properties held for sale 8 3
Other (30) (29)
Total other income 271 243
Gains losses on repurchase of entity's own debt instruments $ (39) (62)
Swisscard    
Other Income [Line Items]    
Share of net profits of associates and joint ventures   64
Proportion of ownership interest in joint venture 50.00%  
Select Portfolio Servicing    
Other Income [Line Items]    
Net gains / (losses) from acquisitions and disposals of subsidiaries   $ 97