Compensation and benefits (Details) - CHF (SFr)
SFr in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Compensation and benefits      
Salaries and variable compensation SFr 7,533 SFr 8,401 SFr 8,608
Social security 622 653 642
Other 808 836 786
Compensation and benefits 8,963 9,890 10,036
Defined Benefit Plan, Service Cost 240 218 270
Defined benefit and defined contribution      
Compensation and benefits      
Defined Benefit Plan, Service Cost 503 517 437
Switzerland | Defined benefit pension plans      
Compensation and benefits      
Defined Benefit Plan, Service Cost 224 203 256
International | Defined benefit pension plans      
Compensation and benefits      
Defined Benefit Plan, Service Cost 16 15 14
International | Other post-retirement defined benefit plans      
Compensation and benefits      
Defined Benefit Plan, Service Cost 0 0 0
Bank      
Compensation and benefits      
Salaries and variable compensation 6,730 7,521 7,733
Social security 530 559 554
Other 751 780 818
Compensation and benefits 8,011 8,860 9,105
Bank | Defined benefit and defined contribution      
Compensation and benefits      
Defined Benefit Plan, Service Cost 497 503 502
Bank | International | Defined benefit pension plans      
Compensation and benefits      
Defined Benefit Plan, Service Cost 14 14 14
Bank | International | Other post-retirement defined benefit plans      
Compensation and benefits      
Defined Benefit Plan, Service Cost SFr 0 SFr 0 SFr 0