Offsetting of financial assets (Details) - CHF (SFr)
SFr in Millions
Dec. 31, 2021
Dec. 31, 2020
Offsetting of derivatives    
Derivative assets, gross, subject to enforceable master netting agreements SFr 106,100 SFr 135,000
Offsetting (95,000) (120,600)
of which counterparty netting (83,000) (103,200)
of which cash collateral netting (12,000) (17,400)
Total net derivatives subject to enforceable master netting agreements 11,100 14,400
Total derivatives not subject to enforceable master netting agreements 6,700 11,200
Total net derivatives presented in the consolidated balance sheets 17,800 25,600
Offsetting of securities purchased under resale agreements and securities borrowing transactions    
Securities purchased under resale agreements, gross 74,100 55,800
Securities purchased under resale agreements, offsetting (16,600) (7,500)
Securities purchased under resale agreements, net 57,500 48,300
Securities borrowing transactions, gross 22,200 25,100
Securities borrowing transactions, offsetting 0 (400)
Securities borrowing transactions, net 22,200 24,700
Total subject to enforceable master netting agreements, gross 96,300 80,900
Total subject to enforceable master netting agreements, offsetting (16,600) (7,900)
Total subject to enforceable master netting agreements, net 79,700 73,000
Total not subject to enforceable master netting agreements 24,200 19,300
Total, gross 120,500 100,200
Total, net 103,900 92,300
of which reported at fair value 68,623 57,994
Amounts not offset in the consolidated balance sheets    
Derivatives, net 11,100 14,400
Derivatives, financial instruments 4,500 5,500
Derivatives, cash collateral received/pledged 0 100
Derivatives, net exposure 6,600 8,800
Securities purchased under resale agreements, net 57,500 48,300
Securities purchased under resale agreements, financial instruments 57,500 48,300
Securities purchased under resale agreements, cash collateral received/pledged 0 0
Securities purchased under resale agreements, net exposure 0 0
Securities borrowing transactions, net 22,200 24,700
Securities borrowing transactions, financial instruments 21,900 24,300
Securities borrowing transactions, cash collateral received/pledged 0 0
Securities borrowing transactions, net exposure 300 400
Total financial assets subject to enforceable master netting agreements, net 90,800 87,400
Total financial assets subject to enforceable master netting agreements, financial instruments 83,900 78,100
Total financial assets subject to enforceable master netting agreements, cash collateral received/pledged 0 100
Total financial assets subject to enforceable master netting agreements, net exposure 6,900 9,200
Trading assets    
Offsetting of derivatives    
Total net derivatives presented in the consolidated balance sheets 17,600 25,500
Other assets    
Offsetting of derivatives    
Total net derivatives presented in the consolidated balance sheets 200 100
OTC-cleared    
Offsetting of derivatives    
Derivative assets, gross, subject to enforceable master netting agreements 5,900 7,000
Offsetting (5,600) (6,200)
Total net derivatives subject to enforceable master netting agreements 300 800
Amounts not offset in the consolidated balance sheets    
Derivatives, net 300 800
OTC    
Offsetting of derivatives    
Derivative assets, gross, subject to enforceable master netting agreements 77,300 107,500
Offsetting (68,400) (94,400)
Total net derivatives subject to enforceable master netting agreements 8,900 13,100
Amounts not offset in the consolidated balance sheets    
Derivatives, net 8,900 13,100
Exchange-traded    
Offsetting of derivatives    
Derivative assets, gross, subject to enforceable master netting agreements 22,900 20,500
Offsetting (21,000) (20,000)
Total net derivatives subject to enforceable master netting agreements 1,900 500
Amounts not offset in the consolidated balance sheets    
Derivatives, net 1,900 500
Interest rate derivatives    
Offsetting of derivatives    
Derivative assets, gross, subject to enforceable master netting agreements 48,900 74,800
Interest rate derivatives | OTC-cleared    
Offsetting of derivatives    
Derivative assets, gross, subject to enforceable master netting agreements 4,400 6,100
Interest rate derivatives | OTC    
Offsetting of derivatives    
Derivative assets, gross, subject to enforceable master netting agreements 44,400 68,200
Interest rate derivatives | Exchange-traded    
Offsetting of derivatives    
Derivative assets, gross, subject to enforceable master netting agreements 100 500
Foreign exchange derivatives    
Offsetting of derivatives    
Derivative assets, gross, subject to enforceable master netting agreements 20,200 23,300
Foreign exchange derivatives | OTC-cleared    
Offsetting of derivatives    
Derivative assets, gross, subject to enforceable master netting agreements 200 200
Foreign exchange derivatives | OTC    
Offsetting of derivatives    
Derivative assets, gross, subject to enforceable master netting agreements 20,000 23,100
Equity/index-related derivatives    
Offsetting of derivatives    
Derivative assets, gross, subject to enforceable master netting agreements 30,900 30,600
Equity/index-related derivatives | OTC    
Offsetting of derivatives    
Derivative assets, gross, subject to enforceable master netting agreements 8,200 10,700
Equity/index-related derivatives | Exchange-traded    
Offsetting of derivatives    
Derivative assets, gross, subject to enforceable master netting agreements 22,700 19,900
Credit derivatives    
Offsetting of derivatives    
Derivative assets, gross, subject to enforceable master netting agreements 4,600 4,600
Credit derivatives | OTC-cleared    
Offsetting of derivatives    
Derivative assets, gross, subject to enforceable master netting agreements 1,300 700
Credit derivatives | OTC    
Offsetting of derivatives    
Derivative assets, gross, subject to enforceable master netting agreements 3,300 3,900
Other products    
Offsetting of derivatives    
Derivative assets, gross, subject to enforceable master netting agreements 1,500 1,700
Other products | OTC    
Offsetting of derivatives    
Derivative assets, gross, subject to enforceable master netting agreements 1,400 1,600
Other products | Exchange-traded    
Offsetting of derivatives    
Derivative assets, gross, subject to enforceable master netting agreements 100 100
Bank    
Offsetting of derivatives    
Derivative assets, gross, subject to enforceable master netting agreements 106,200 135,000
Offsetting (95,100) (120,600)
of which counterparty netting (83,000) (103,200)
of which cash collateral netting (12,100) (17,400)
Total net derivatives subject to enforceable master netting agreements 11,100 14,400
Total derivatives not subject to enforceable master netting agreements 6,700 11,200
Total net derivatives presented in the consolidated balance sheets 17,800 25,600
Offsetting of securities purchased under resale agreements and securities borrowing transactions    
Securities purchased under resale agreements, gross 74,100 55,800
Securities purchased under resale agreements, offsetting (16,600) (7,500)
Securities purchased under resale agreements, net 57,500 48,300
Securities borrowing transactions, gross 22,200 25,100
Securities borrowing transactions, offsetting 0 (400)
Securities borrowing transactions, net 22,200 24,700
Total subject to enforceable master netting agreements, gross 96,300 80,900
Total subject to enforceable master netting agreements, offsetting (16,600) (7,900)
Total subject to enforceable master netting agreements, net 79,700 73,000
Total not subject to enforceable master netting agreements 24,200 19,300
Total, gross 120,500 100,200
Total, net 103,900 92,300
of which reported at fair value 68,623 57,994
Amounts not offset in the consolidated balance sheets    
Derivatives, net 11,100 14,400
Derivatives, financial instruments 4,500 5,500
Derivatives, cash collateral received/pledged 0 100
Derivatives, net exposure 6,600 8,800
Securities purchased under resale agreements, net 57,500 48,300
Securities purchased under resale agreements, financial instruments 57,500 48,300
Securities purchased under resale agreements, cash collateral received/pledged 0 0
Securities purchased under resale agreements, net exposure 0 0
Securities borrowing transactions, net 22,200 24,700
Securities borrowing transactions, financial instruments 21,900 24,300
Securities borrowing transactions, cash collateral received/pledged 0 0
Securities borrowing transactions, net exposure 300 400
Total financial assets subject to enforceable master netting agreements, net 90,800 87,400
Total financial assets subject to enforceable master netting agreements, financial instruments 83,900 78,100
Total financial assets subject to enforceable master netting agreements, cash collateral received/pledged 0 100
Total financial assets subject to enforceable master netting agreements, net exposure 6,900 9,200
Bank | Trading assets    
Offsetting of derivatives    
Total net derivatives presented in the consolidated balance sheets 17,600 25,500
Bank | Other assets    
Offsetting of derivatives    
Total net derivatives presented in the consolidated balance sheets 200 100
Bank | OTC-cleared    
Offsetting of derivatives    
Derivative assets, gross, subject to enforceable master netting agreements 5,900 7,000
Offsetting (5,600) (6,200)
Total net derivatives subject to enforceable master netting agreements 300 800
Amounts not offset in the consolidated balance sheets    
Derivatives, net 300 800
Bank | OTC    
Offsetting of derivatives    
Derivative assets, gross, subject to enforceable master netting agreements 77,400 107,500
Offsetting (68,500) (94,400)
Total net derivatives subject to enforceable master netting agreements 8,900 13,100
Amounts not offset in the consolidated balance sheets    
Derivatives, net 8,900 13,100
Bank | Exchange-traded    
Offsetting of derivatives    
Derivative assets, gross, subject to enforceable master netting agreements 22,900 20,500
Offsetting (21,000) (20,000)
Total net derivatives subject to enforceable master netting agreements 1,900 500
Amounts not offset in the consolidated balance sheets    
Derivatives, net 1,900 500
Bank | Interest rate derivatives    
Offsetting of derivatives    
Derivative assets, gross, subject to enforceable master netting agreements 49,000 74,800
Bank | Interest rate derivatives | OTC-cleared    
Offsetting of derivatives    
Derivative assets, gross, subject to enforceable master netting agreements 4,400 6,100
Bank | Interest rate derivatives | OTC    
Offsetting of derivatives    
Derivative assets, gross, subject to enforceable master netting agreements 44,500 68,200
Bank | Interest rate derivatives | Exchange-traded    
Offsetting of derivatives    
Derivative assets, gross, subject to enforceable master netting agreements 100 500
Bank | Foreign exchange derivatives    
Offsetting of derivatives    
Derivative assets, gross, subject to enforceable master netting agreements 20,200 23,300
Bank | Foreign exchange derivatives | OTC-cleared    
Offsetting of derivatives    
Derivative assets, gross, subject to enforceable master netting agreements 200 200
Bank | Foreign exchange derivatives | OTC    
Offsetting of derivatives    
Derivative assets, gross, subject to enforceable master netting agreements 20,000 23,100
Bank | Equity/index-related derivatives    
Offsetting of derivatives    
Derivative assets, gross, subject to enforceable master netting agreements 30,900 30,600
Bank | Equity/index-related derivatives | OTC    
Offsetting of derivatives    
Derivative assets, gross, subject to enforceable master netting agreements 8,200 10,700
Bank | Equity/index-related derivatives | Exchange-traded    
Offsetting of derivatives    
Derivative assets, gross, subject to enforceable master netting agreements 22,700 19,900
Bank | Credit derivatives    
Offsetting of derivatives    
Derivative assets, gross, subject to enforceable master netting agreements 4,600 4,600
Bank | Credit derivatives | OTC-cleared    
Offsetting of derivatives    
Derivative assets, gross, subject to enforceable master netting agreements 1,300 700
Bank | Credit derivatives | OTC    
Offsetting of derivatives    
Derivative assets, gross, subject to enforceable master netting agreements 3,300 3,900
Bank | Other products    
Offsetting of derivatives    
Derivative assets, gross, subject to enforceable master netting agreements 1,500 1,700
Bank | Other products | OTC    
Offsetting of derivatives    
Derivative assets, gross, subject to enforceable master netting agreements 1,400 1,600
Bank | Other products | Exchange-traded    
Offsetting of derivatives    
Derivative assets, gross, subject to enforceable master netting agreements SFr 100 SFr 100