Financial instruments (FI) - Assets measured at fair value (Details 2) - CHF (SFr)
SFr in Millions
Dec. 31, 2021
Dec. 31, 2020
Assets    
Cash and Due from Banks SFr 308 SFr 525
Central bank funds sold, securities purchased under resale agreements and securities borrowing transactions 68,623 57,994
Securities received as collateral 15,017 50,773
Trading assets 111,141 157,338
Available-for-sale Securities, Debt Securities 1,005 607
Other investments 4,094 3,794
Loans 10,243 11,408
Other intangible assets (mortgage servicing rights), at fair value 224 180
Other assets 9,184 8,373
Other assets - of which failed purchases 1,307 1,451
Netting impact (95,000) (120,600)
Total assets at fair value, measured at net asset value per share 1,069 1,378
Recurring basis    
Assets    
Cash and Due from Banks 308 525
Central bank funds sold, securities purchased under resale agreements and securities borrowing transactions 68,623 57,994
Securities received as collateral 15,017 50,773
Trading assets 111,141 157,338
Available-for-sale Securities, Debt Securities 1,005 607
Other investments 4,094 3,794
Loans 10,243 11,408
Loans - of which commercial and industrial 2,984 3,534
Loans - of which financial institutions 4,305 4,588
Other intangible assets (mortgage servicing rights), at fair value 224 180
Other assets 9,184 8,373
Other assets - of which loans held-for-sale 7,380 6,446
Other assets - of which failed purchases 1,244 1,389
Netting impact (95,014) (120,635)
Total assets at fair value 219,839 290,992
Recurring basis | Other equity investments    
Assets    
Other investments 3,237 2,759
Recurring basis | Life finance instruments    
Assets    
Other investments 789 920
Recurring basis | Debt securities    
Assets    
Trading assets 54,198 64,395
Recurring basis | Debt securities | Debt securities issued by foreign governments    
Assets    
Trading assets 23,408 27,957
Recurring basis | Debt securities | Corporate debt securities    
Assets    
Trading assets 9,590 11,477
Recurring basis | Debt securities | RMBS    
Assets    
Trading assets 17,457 21,439
Recurring basis | Equity securities    
Assets    
Trading assets 36,546 63,237
Recurring basis | Derivative instruments    
Assets    
Trading assets 17,559 25,531
Netting impact (94,633) (119,731)
Recurring basis | Trading assets    
Assets    
Netting impact (94,633) (119,731)
Recurring basis | Other    
Assets    
Trading assets 2,838 4,175
Recurring basis | Other assets    
Assets    
Netting impact (381) (904)
Recurring basis | Level 1    
Assets    
Cash and Due from Banks 0 0
Central bank funds sold, securities purchased under resale agreements and securities borrowing transactions 0 0
Securities received as collateral 13,848 44,074
Trading assets 54,085 87,710
Available-for-sale Securities, Debt Securities 2 2
Other investments 0 13
Loans 0 0
Loans - of which commercial and industrial 0 0
Loans - of which financial institutions 0 0
Other intangible assets (mortgage servicing rights), at fair value 0 0
Other assets 121 137
Other assets - of which loans held-for-sale 0 0
Other assets - of which failed purchases 98 109
Total assets at fair value 68,056 131,936
Recurring basis | Level 1 | Other equity investments    
Assets    
Other investments 0 13
Recurring basis | Level 1 | Life finance instruments    
Assets    
Other investments 0 0
Recurring basis | Level 1 | Debt securities    
Assets    
Trading assets 12,191 16,321
Recurring basis | Level 1 | Debt securities | Debt securities issued by foreign governments    
Assets    
Trading assets 11,996 15,908
Recurring basis | Level 1 | Debt securities | Corporate debt securities    
Assets    
Trading assets 72 353
Recurring basis | Level 1 | Debt securities | RMBS    
Assets    
Trading assets 0 0
Recurring basis | Level 1 | Equity securities    
Assets    
Trading assets 34,282 60,044
Recurring basis | Level 1 | Derivative instruments    
Assets    
Trading assets 6,224 9,297
Recurring basis | Level 1 | Derivative instruments | Interest rate derivatives    
Assets    
Trading assets 721 3,036
Recurring basis | Level 1 | Derivative instruments | Foreign exchange derivatives    
Assets    
Trading assets 123 42
Recurring basis | Level 1 | Derivative instruments | Equity/Index-related products    
Assets    
Trading assets 5,348 6,150
Recurring basis | Level 1 | Derivative instruments | Other derivatives    
Assets    
Trading assets 0 22
Recurring basis | Level 1 | Other    
Assets    
Trading assets 1,388 2,048
Recurring basis | Level 2    
Assets    
Cash and Due from Banks 308 525
Central bank funds sold, securities purchased under resale agreements and securities borrowing transactions 68,623 57,994
Securities received as collateral 1,155 6,598
Trading assets 146,521 181,166
Available-for-sale Securities, Debt Securities 1,003 605
Other investments 23 6
Loans 8,709 7,739
Loans - of which commercial and industrial 2,267 2,187
Loans - of which financial institutions 3,840 3,506
Other intangible assets (mortgage servicing rights), at fair value 57 0
Other assets 8,750 7,315
Other assets - of which loans held-for-sale 6,818 4,870
Other assets - of which failed purchases 1,135 1,229
Total assets at fair value 235,149 261,948
Recurring basis | Level 2 | Other equity investments    
Assets    
Other investments 23 6
Recurring basis | Level 2 | Life finance instruments    
Assets    
Other investments 0 0
Recurring basis | Level 2 | Debt securities    
Assets    
Trading assets 40,700 45,766
Recurring basis | Level 2 | Debt securities | Debt securities issued by foreign governments    
Assets    
Trading assets 11,377 11,909
Recurring basis | Level 2 | Debt securities | Corporate debt securities    
Assets    
Trading assets 8,958 9,799
Recurring basis | Level 2 | Debt securities | RMBS    
Assets    
Trading assets 17,033 20,882
Recurring basis | Level 2 | Equity securities    
Assets    
Trading assets 1,486 2,466
Recurring basis | Level 2 | Derivative instruments    
Assets    
Trading assets 103,781 132,054
Recurring basis | Level 2 | Derivative instruments | Interest rate derivatives    
Assets    
Trading assets 47,934 71,043
Recurring basis | Level 2 | Derivative instruments | Foreign exchange derivatives    
Assets    
Trading assets 20,686 24,259
Recurring basis | Level 2 | Derivative instruments | Equity/Index-related products    
Assets    
Trading assets 29,808 31,945
Recurring basis | Level 2 | Derivative instruments | Other derivatives    
Assets    
Trading assets 196 110
Recurring basis | Level 2 | Other    
Assets    
Trading assets 554 880
Recurring basis | Level 3    
Assets    
Cash and Due from Banks 0 0
Central bank funds sold, securities purchased under resale agreements and securities borrowing transactions 0 0
Securities received as collateral 14 101
Trading assets 4,503 7,535
Available-for-sale Securities, Debt Securities 0 0
Other investments 3,666 3,054
Loans 1,534 3,669
Loans - of which commercial and industrial 717 1,347
Loans - of which financial institutions 465 1,082
Other intangible assets (mortgage servicing rights), at fair value 167 180
Other assets 694 1,825
Other assets - of which loans held-for-sale 562 1,576
Other assets - of which failed purchases 11 51
Total assets at fair value 10,578 16,364
Recurring basis | Level 3 | Other equity investments    
Assets    
Other investments 2,863 2,132
Recurring basis | Level 3 | Life finance instruments    
Assets    
Other investments 789 920
Recurring basis | Level 3 | Debt securities    
Assets    
Trading assets 1,225 2,253
Recurring basis | Level 3 | Debt securities | Debt securities issued by foreign governments    
Assets    
Trading assets 35 140
Recurring basis | Level 3 | Debt securities | Corporate debt securities    
Assets    
Trading assets 478 1,270
Recurring basis | Level 3 | Debt securities | RMBS    
Assets    
Trading assets 424 557
Recurring basis | Level 3 | Equity securities    
Assets    
Trading assets 195 124
Recurring basis | Level 3 | Derivative instruments    
Assets    
Trading assets 2,187 3,911
Recurring basis | Level 3 | Derivative instruments | Interest rate derivatives    
Assets    
Trading assets 624 733
Recurring basis | Level 3 | Derivative instruments | Foreign exchange derivatives    
Assets    
Trading assets 53 143
Recurring basis | Level 3 | Derivative instruments | Equity/Index-related products    
Assets    
Trading assets 212 1,186
Recurring basis | Level 3 | Derivative instruments | Other derivatives    
Assets    
Trading assets 1,034 1,079
Recurring basis | Level 3 | Other    
Assets    
Trading assets 896 1,247
Recurring basis | Fair value measured at net asset value per share    
Assets    
Trading assets 665 658
Other investments 405 721
Total assets at fair value 1,070 1,379
Recurring basis | Fair value measured at net asset value per share | Other equity investments    
Assets    
Other investments 351 608
Recurring basis | Fair value measured at net asset value per share | Debt securities    
Assets    
Trading assets 82 55
Recurring basis | Fair value measured at net asset value per share | Debt securities | Corporate debt securities    
Assets    
Trading assets 82 55
Recurring basis | Fair value measured at net asset value per share | Equity securities    
Assets    
Trading assets 583 603
Nonrecurring basis    
Assets    
Other investments 152 543
Loans 17 71
Other assets 139 201
Total assets at fair value 308 815
Nonrecurring basis | Equity securities    
Assets    
Other investments 118 303
Nonrecurring basis | Equity securities (without a readily determinable fair value)    
Assets    
Other investments 21 227
Nonrecurring basis | Other assets    
Assets    
Other assets - of which loans held-for-sale 73 136
Other assets - of which premises, equipment and right-of-use assets 61 58
Nonrecurring basis | Level 1    
Assets    
Other investments 0 0
Loans 0 0
Other assets 0 0
Total assets at fair value 0 0
Nonrecurring basis | Level 1 | Equity securities    
Assets    
Other investments 0 0
Nonrecurring basis | Level 1 | Equity securities (without a readily determinable fair value)    
Assets    
Other investments 0 0
Nonrecurring basis | Level 1 | Other assets    
Assets    
Other assets - of which loans held-for-sale 0 0
Other assets - of which premises, equipment and right-of-use assets 0 0
Nonrecurring basis | Level 2    
Assets    
Other investments 0 217
Loans 12 67
Other assets 29 104
Total assets at fair value 41 388
Nonrecurring basis | Level 2 | Equity securities    
Assets    
Other investments 0 0
Nonrecurring basis | Level 2 | Equity securities (without a readily determinable fair value)    
Assets    
Other investments 0 217
Nonrecurring basis | Level 2 | Other assets    
Assets    
Other assets - of which loans held-for-sale 28 97
Other assets - of which premises, equipment and right-of-use assets 1 4
Nonrecurring basis | Level 3    
Assets    
Other investments 152 326
Loans 5 4
Other assets 110 97
Total assets at fair value 267 427
Nonrecurring basis | Level 3 | Equity securities    
Assets    
Other investments 118 303
Nonrecurring basis | Level 3 | Equity securities (without a readily determinable fair value)    
Assets    
Other investments 21 10
Nonrecurring basis | Level 3 | Other assets    
Assets    
Other assets - of which loans held-for-sale 45 39
Other assets - of which premises, equipment and right-of-use assets 60 54
Bank    
Assets    
Cash and Due from Banks 308 525
Central bank funds sold, securities purchased under resale agreements and securities borrowing transactions 68,623 57,994
Securities received as collateral 15,017 50,773
Trading assets 111,299 157,511
Available-for-sale Securities, Debt Securities 1,003 605
Other investments 4,093 3,793
Loans 10,243 11,408
Other intangible assets (mortgage servicing rights), at fair value 224 180
Other assets 9,184 8,373
Other assets - of which failed purchases 1,307 1,451
Netting impact (95,100) (120,600)
Total assets at fair value, measured at net asset value per share 1,068 1,377
Bank | Recurring basis    
Assets    
Cash and Due from Banks 308 525
Central bank funds sold, securities purchased under resale agreements and securities borrowing transactions 68,623 57,994
Securities received as collateral 15,017 50,773
Trading assets 111,299 157,511
Available-for-sale Securities, Debt Securities 1,003 605
Other investments 4,093 3,793
Loans 10,243 11,408
Loans - of which commercial and industrial 2,984 3,534
Loans - of which financial institutions 4,305 4,588
Other intangible assets (mortgage servicing rights), at fair value 224 180
Other assets 9,184 8,373
Other assets - of which loans held-for-sale 7,380 6,446
Other assets - of which failed purchases 1,244 1,389
Netting impact (95,163) (120,635)
Total assets at fair value 219,994 291,162
Bank | Recurring basis | Other equity investments    
Assets    
Other investments 3,237 2,760
Bank | Recurring basis | Life finance instruments    
Assets    
Other investments 789 920
Bank | Recurring basis | Debt securities    
Assets    
Trading assets 54,297 64,532
Bank | Recurring basis | Debt securities | Debt securities issued by foreign governments    
Assets    
Trading assets 23,408 27,957
Bank | Recurring basis | Debt securities | Corporate debt securities    
Assets    
Trading assets 9,689 11,614
Bank | Recurring basis | Debt securities | RMBS    
Assets    
Trading assets 17,457 21,439
Bank | Recurring basis | Equity securities    
Assets    
Trading assets 36,606 63,273
Bank | Recurring basis | Derivative instruments    
Assets    
Trading assets 17,559 25,531
Netting impact (94,782) (119,731)
Bank | Recurring basis | Trading assets    
Assets    
Netting impact (94,782) (119,731)
Bank | Recurring basis | Other    
Assets    
Trading assets 2,837 4,175
Bank | Recurring basis | Other assets    
Assets    
Netting impact (381) (904)
Bank | Recurring basis | Level 1    
Assets    
Cash and Due from Banks 0 0
Central bank funds sold, securities purchased under resale agreements and securities borrowing transactions 0 0
Securities received as collateral 13,848 44,074
Trading assets 54,145 87,746
Available-for-sale Securities, Debt Securities 0 1
Other investments 0 13
Loans 0 0
Loans - of which commercial and industrial 0 0
Loans - of which financial institutions 0 0
Other intangible assets (mortgage servicing rights), at fair value 0 0
Other assets 121 137
Other assets - of which loans held-for-sale 0 0
Other assets - of which failed purchases 98 109
Total assets at fair value 68,114 131,971
Bank | Recurring basis | Level 1 | Other equity investments    
Assets    
Other investments 0 13
Bank | Recurring basis | Level 1 | Life finance instruments    
Assets    
Other investments 0 0
Bank | Recurring basis | Level 1 | Debt securities    
Assets    
Trading assets 12,191 16,321
Bank | Recurring basis | Level 1 | Debt securities | Debt securities issued by foreign governments    
Assets    
Trading assets 11,996 15,908
Bank | Recurring basis | Level 1 | Debt securities | Corporate debt securities    
Assets    
Trading assets 72 353
Bank | Recurring basis | Level 1 | Debt securities | RMBS    
Assets    
Trading assets 0 0
Bank | Recurring basis | Level 1 | Equity securities    
Assets    
Trading assets 34,342 60,080
Bank | Recurring basis | Level 1 | Derivative instruments    
Assets    
Trading assets 6,224 9,297
Bank | Recurring basis | Level 1 | Derivative instruments | Interest rate derivatives    
Assets    
Trading assets 721 3,036
Bank | Recurring basis | Level 1 | Derivative instruments | Foreign exchange derivatives    
Assets    
Trading assets 123 42
Bank | Recurring basis | Level 1 | Derivative instruments | Equity/Index-related products    
Assets    
Trading assets 5,348 6,150
Bank | Recurring basis | Level 1 | Derivative instruments | Other derivatives    
Assets    
Trading assets 0 22
Bank | Recurring basis | Level 1 | Other    
Assets    
Trading assets 1,388 2,048
Bank | Recurring basis | Level 2    
Assets    
Cash and Due from Banks 308 525
Central bank funds sold, securities purchased under resale agreements and securities borrowing transactions 68,623 57,994
Securities received as collateral 1,155 6,598
Trading assets 146,768 181,303
Available-for-sale Securities, Debt Securities 1,003 604
Other investments 23 6
Loans 8,709 7,739
Loans - of which commercial and industrial 2,267 2,187
Loans - of which financial institutions 3,840 3,506
Other intangible assets (mortgage servicing rights), at fair value 57 0
Other assets 8,750 7,315
Other assets - of which loans held-for-sale 6,818 4,870
Other assets - of which failed purchases 1,135 1,229
Total assets at fair value 235,396 262,084
Bank | Recurring basis | Level 2 | Other equity investments    
Assets    
Other investments 23 6
Bank | Recurring basis | Level 2 | Life finance instruments    
Assets    
Other investments 0 0
Bank | Recurring basis | Level 2 | Debt securities    
Assets    
Trading assets 40,799 45,903
Bank | Recurring basis | Level 2 | Debt securities | Debt securities issued by foreign governments    
Assets    
Trading assets 11,377 11,909
Bank | Recurring basis | Level 2 | Debt securities | Corporate debt securities    
Assets    
Trading assets 9,057 9,936
Bank | Recurring basis | Level 2 | Debt securities | RMBS    
Assets    
Trading assets 17,033 20,882
Bank | Recurring basis | Level 2 | Equity securities    
Assets    
Trading assets 1,486 2,466
Bank | Recurring basis | Level 2 | Derivative instruments    
Assets    
Trading assets 103,930 132,054
Bank | Recurring basis | Level 2 | Derivative instruments | Interest rate derivatives    
Assets    
Trading assets 48,083 71,043
Bank | Recurring basis | Level 2 | Derivative instruments | Foreign exchange derivatives    
Assets    
Trading assets 20,686 24,259
Bank | Recurring basis | Level 2 | Derivative instruments | Equity/Index-related products    
Assets    
Trading assets 29,808 31,945
Bank | Recurring basis | Level 2 | Derivative instruments | Other derivatives    
Assets    
Trading assets 196 110
Bank | Recurring basis | Level 2 | Other    
Assets    
Trading assets 553 880
Bank | Recurring basis | Level 3    
Assets    
Cash and Due from Banks 0 0
Central bank funds sold, securities purchased under resale agreements and securities borrowing transactions 0 0
Securities received as collateral 14 101
Trading assets 4,503 7,535
Available-for-sale Securities, Debt Securities 0 0
Other investments 3,666 3,054
Loans 1,534 3,669
Loans - of which commercial and industrial 717 1,347
Loans - of which financial institutions 465 1,082
Other intangible assets (mortgage servicing rights), at fair value 167 180
Other assets 694 1,825
Other assets - of which loans held-for-sale 562 1,576
Other assets - of which failed purchases 11 51
Total assets at fair value 10,578 16,364
Bank | Recurring basis | Level 3 | Other equity investments    
Assets    
Other investments 2,863 2,132
Bank | Recurring basis | Level 3 | Life finance instruments    
Assets    
Other investments 789 920
Bank | Recurring basis | Level 3 | Debt securities    
Assets    
Trading assets 1,225 2,253
Bank | Recurring basis | Level 3 | Debt securities | Debt securities issued by foreign governments    
Assets    
Trading assets 35 140
Bank | Recurring basis | Level 3 | Debt securities | Corporate debt securities    
Assets    
Trading assets 478 1,270
Bank | Recurring basis | Level 3 | Debt securities | RMBS    
Assets    
Trading assets 424 557
Bank | Recurring basis | Level 3 | Equity securities    
Assets    
Trading assets 195 124
Bank | Recurring basis | Level 3 | Derivative instruments    
Assets    
Trading assets 2,187 3,911
Bank | Recurring basis | Level 3 | Derivative instruments | Interest rate derivatives    
Assets    
Trading assets 624 733
Bank | Recurring basis | Level 3 | Derivative instruments | Foreign exchange derivatives    
Assets    
Trading assets 53 143
Bank | Recurring basis | Level 3 | Derivative instruments | Equity/Index-related products    
Assets    
Trading assets 212 1,186
Bank | Recurring basis | Level 3 | Derivative instruments | Other derivatives    
Assets    
Trading assets 1,034 1,079
Bank | Recurring basis | Level 3 | Other    
Assets    
Trading assets 896 1,247
Bank | Recurring basis | Fair value measured at net asset value per share    
Assets    
Trading assets 665 658
Other investments 404 720
Total assets at fair value 1,069 1,378
Bank | Recurring basis | Fair value measured at net asset value per share | Other equity investments    
Assets    
Other investments 351 609
Bank | Recurring basis | Fair value measured at net asset value per share | Debt securities    
Assets    
Trading assets 82 55
Bank | Recurring basis | Fair value measured at net asset value per share | Debt securities | Corporate debt securities    
Assets    
Trading assets 82 55
Bank | Recurring basis | Fair value measured at net asset value per share | Equity securities    
Assets    
Trading assets 583 603
Bank | Nonrecurring basis    
Assets    
Other investments 152 543
Loans 17 71
Other assets 139 201
Total assets at fair value 308 815
Bank | Nonrecurring basis | Equity securities    
Assets    
Other investments 118 303
Bank | Nonrecurring basis | Equity securities (without a readily determinable fair value)    
Assets    
Other investments 21 227
Bank | Nonrecurring basis | Other assets    
Assets    
Other assets - of which loans held-for-sale 73 136
Other assets - of which premises, equipment and right-of-use assets 61 58
Bank | Nonrecurring basis | Level 1    
Assets    
Other investments 0 0
Loans 0 0
Other assets 0 0
Total assets at fair value 0 0
Bank | Nonrecurring basis | Level 1 | Equity securities    
Assets    
Other investments 0 0
Bank | Nonrecurring basis | Level 1 | Equity securities (without a readily determinable fair value)    
Assets    
Other investments 0 0
Bank | Nonrecurring basis | Level 1 | Other assets    
Assets    
Other assets - of which loans held-for-sale 0 0
Other assets - of which premises, equipment and right-of-use assets 0 0
Bank | Nonrecurring basis | Level 2    
Assets    
Other investments 0 217
Loans 12 67
Other assets 29 104
Total assets at fair value 41 388
Bank | Nonrecurring basis | Level 2 | Equity securities    
Assets    
Other investments 0 0
Bank | Nonrecurring basis | Level 2 | Equity securities (without a readily determinable fair value)    
Assets    
Other investments 0 217
Bank | Nonrecurring basis | Level 2 | Other assets    
Assets    
Other assets - of which loans held-for-sale 28 97
Other assets - of which premises, equipment and right-of-use assets 1 4
Bank | Nonrecurring basis | Level 3    
Assets    
Other investments 152 326
Loans 5 4
Other assets 110 97
Total assets at fair value 267 427
Bank | Nonrecurring basis | Level 3 | Equity securities    
Assets    
Other investments 118 303
Bank | Nonrecurring basis | Level 3 | Equity securities (without a readily determinable fair value)    
Assets    
Other investments 21 10
Bank | Nonrecurring basis | Level 3 | Other assets    
Assets    
Other assets - of which loans held-for-sale 45 39
Other assets - of which premises, equipment and right-of-use assets SFr 60 SFr 54