Estimated unrecognized deferred compensation (Details 2) SFr in Millions	12 Months Ended
	Dec. 31, 2018 CHF (SFr)
Estimated unrecognized compensation expense
Total estimated unrecognized compensation expense	SFr 953
Aggregate remaining weighted-average requisite service period (years)
Aggregate remaining requisite service period (in years)	1 year 3 months 19 days
Other Cash Awards
Estimated unrecognized compensation expense
Total estimated unrecognized compensation expense	SFr 179
Contingent Capital Awards (CCA)
Estimated unrecognized compensation expense
Total estimated unrecognized compensation expense	141
Performance shares | Performance share awards
Estimated unrecognized compensation expense
Total estimated unrecognized compensation expense	167
Stock compensation plan | Share awards
Estimated unrecognized compensation expense
Total estimated unrecognized compensation expense	466
Bank
Estimated unrecognized compensation expense
Total estimated unrecognized compensation expense	SFr 912
Aggregate remaining weighted-average requisite service period (years)
Aggregate remaining requisite service period (in years)	1 year 3 months 19 days
Bank | Other Cash Awards
Estimated unrecognized compensation expense
Total estimated unrecognized compensation expense	SFr 160
Bank | Contingent Capital Awards (CCA)
Estimated unrecognized compensation expense
Total estimated unrecognized compensation expense	136
Bank | Performance shares | Performance share awards
Estimated unrecognized compensation expense
Total estimated unrecognized compensation expense	161
Bank | Stock compensation plan | Share awards
Estimated unrecognized compensation expense
Total estimated unrecognized compensation expense	SFr 455