FI - Fair value, unfunded commitments, term of redemption conditions (Details 12) - CHF (SFr)
SFr in Millions
Dec. 31, 2021
Dec. 31, 2020
Schedule of Investments, Fair Value Calculated Using Net Asset Value    
Non-redeemable SFr 581 SFr 565
Redeemable 488 813
Total fair value 1,069 1,378
Unfunded commitments 191 348
Investments, Fair Value Calculated Using Net Asset Value, Additional Disclosures    
Nonredeemable with known Liquidation Periods 339 190
Nonredeemable with unknown Liquidation Periods 242 375
Redeemable on demand with notice period less than 30 days 304 540
Redeemable on demand with notice period less than 1 year   4
Funds held in trading assets and liabilities    
Schedule of Investments, Fair Value Calculated Using Net Asset Value    
Non-redeemable 193 138
Redeemable 471 519
Total fair value 664 657
Unfunded commitments 24 45
Funds held in other investments    
Schedule of Investments, Fair Value Calculated Using Net Asset Value    
Non-redeemable 388 427
Redeemable 17 294
Total fair value 405 721
Unfunded commitments 167 303
Funds held in other investments | Hedge funds    
Schedule of Investments, Fair Value Calculated Using Net Asset Value    
Non-redeemable 12 12
Redeemable 2 7
Total fair value 14 19
Unfunded commitments 1 0
Funds held in other investments | Private equity funds    
Schedule of Investments, Fair Value Calculated Using Net Asset Value    
Non-redeemable 40 94
Redeemable 0 0
Total fair value 40 94
Unfunded commitments 42 77
Funds held in other investments | Equity method investments    
Schedule of Investments, Fair Value Calculated Using Net Asset Value    
Non-redeemable 336 321
Redeemable 15 287
Total fair value 351 608
Unfunded commitments 124 226
Bank    
Schedule of Investments, Fair Value Calculated Using Net Asset Value    
Non-redeemable 580 564
Redeemable 488 813
Total fair value 1,068 1,377
Unfunded commitments 191 348
Investments, Fair Value Calculated Using Net Asset Value, Additional Disclosures    
Nonredeemable with known Liquidation Periods 339 190
Nonredeemable with unknown Liquidation Periods 241 374
Redeemable on demand with notice period less than 30 days 304 540
Redeemable on demand with notice period less than 1 year   4
Bank | Funds held in trading assets and liabilities    
Schedule of Investments, Fair Value Calculated Using Net Asset Value    
Non-redeemable 193 138
Redeemable 471 519
Total fair value 664 657
Unfunded commitments 24 45
Bank | Funds held in other investments    
Schedule of Investments, Fair Value Calculated Using Net Asset Value    
Non-redeemable 387 426
Redeemable 17 294
Total fair value 404 720
Unfunded commitments 167 303
Bank | Funds held in other investments | Hedge funds    
Schedule of Investments, Fair Value Calculated Using Net Asset Value    
Non-redeemable 12 12
Redeemable 2 7
Total fair value 14 19
Unfunded commitments 1 0
Bank | Funds held in other investments | Private equity funds    
Schedule of Investments, Fair Value Calculated Using Net Asset Value    
Non-redeemable 39 92
Redeemable 0 0
Total fair value 39 92
Unfunded commitments 42 77
Bank | Funds held in other investments | Equity method investments    
Schedule of Investments, Fair Value Calculated Using Net Asset Value    
Non-redeemable 336 322
Redeemable 15 287
Total fair value 351 609
Unfunded commitments SFr 124 SFr 226