Segment information - Income statement related (Details) - CHF (SFr)
SFr in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Segment Reporting Information      
Net revenues SFr 22,696 SFr 22,389 SFr 22,484
Income/(loss) before taxes (600) 3,467 4,720
Switzerland      
Segment Reporting Information      
Net revenues 7,285 7,719 8,434
Income/(loss) before taxes 257 1,770 2,985
EMEA      
Segment Reporting Information      
Net revenues 3,524 3,885 1,962
Income/(loss) before taxes (4,929) (124) (1,786)
Americas      
Segment Reporting Information      
Net revenues 8,827 7,614 9,103
Income/(loss) before taxes 3,781 1,577 3,409
Asia Pacific      
Segment Reporting Information      
Net revenues 3,060 3,171 2,985
Income/(loss) before taxes 291 244 112
Operating Segments [Member] | Swiss Universal Bank      
Segment Reporting Information      
Net revenues 5,801 5,615 5,905
Income/(loss) before taxes 2,729 2,104 2,573
Operating Segments [Member] | International Wealth Management      
Segment Reporting Information      
Net revenues 3,462 3,747 4,181
Income/(loss) before taxes 976 1,091 1,586
Operating Segments [Member] | Asia Pacific      
Segment Reporting Information      
Net revenues 3,242 3,155 3,029
Income/(loss) before taxes 994 828 922
Operating Segments [Member] | Investment Bank      
Segment Reporting Information      
Net revenues 8,888 9,098 8,161
Income/(loss) before taxes (3,703) 1,655 1,026
Operating Segments [Member] | Asset Management      
Segment Reporting Information      
Net revenues 1,456 1,090 1,635
Income/(loss) before taxes 300 (39) 479
Corporate Center      
Segment Reporting Information      
Net revenues (153) (316) (427)
Income/(loss) before taxes (1,896) (2,172) (1,866)
Bank      
Segment Reporting Information      
Net revenues 23,042 22,503 22,686
Income/(loss) before taxes (91) 3,211 4,393
Bank | Switzerland      
Segment Reporting Information      
Net revenues 8,382 8,659 9,239
Income/(loss) before taxes 1,659 2,477 3,259
Bank | EMEA      
Segment Reporting Information      
Net revenues 2,916 3,162 1,244
Income/(loss) before taxes (5,554) (847) (2,574)
Bank | Americas      
Segment Reporting Information      
Net revenues 8,896 7,765 9,253
Income/(loss) before taxes 3,574 1,419 3,348
Bank | Asia Pacific      
Segment Reporting Information      
Net revenues 2,848 2,917 2,950
Income/(loss) before taxes 230 162 360
Bank | Operating Segments [Member] | Swiss Universal Bank      
Segment Reporting Information      
Net revenues 5,801 5,615 5,905
Income/(loss) before taxes 2,729 2,104 2,573
Bank | Operating Segments [Member] | International Wealth Management      
Segment Reporting Information      
Net revenues 3,462 3,747 4,181
Income/(loss) before taxes 976 1,091 1,586
Bank | Operating Segments [Member] | Asia Pacific      
Segment Reporting Information      
Net revenues 3,242 3,155 3,029
Income/(loss) before taxes 994 828 922
Bank | Operating Segments [Member] | Investment Bank      
Segment Reporting Information      
Net revenues 8,888 9,098 8,161
Income/(loss) before taxes (3,703) 1,655 1,026
Bank | Operating Segments [Member] | Asset Management      
Segment Reporting Information      
Net revenues 1,456 1,090 1,635
Income/(loss) before taxes 300 (39) 479
Bank | Adjustments      
Segment Reporting Information      
Net revenues 193 (202) (225)
Income/(loss) before taxes SFr (1,387) SFr (2,428) SFr (2,193)