Offsetting of financial liabilities (Details 2) - CHF (SFr)
SFr in Millions
Dec. 31, 2021
Dec. 31, 2020
Offsetting of derivatives    
Derivative liabilities, gross, subject to enforceable master netting agreements SFr 107,200 SFr 140,700
Offsetting (100,900) (130,000)
of which counterparty netting (83,000) (103,200)
of which cash collateral netting (17,900) (26,800)
Total net derivatives subject to enforceable master netting agreements 6,300 10,700
Total derivatives not subject to enforceable master netting agreements 4,300 6,800
Total net derivatives presented in the consolidated balance sheets 10,600 17,500
Offsetting of securities sold under repurchase agreements, securities lending transactions and obligation to return securities received as collateral    
Securities sold under repurchase agreements, gross 32,200 26,000
Securities sold under repurchase agreements, offsetting (16,600) (7,900)
Securities sold under repurchase agreements, net 15,600 18,100
Securities lending transactions, gross 15,400 16,600
Securities lending transactions, offsetting 0 0
Securities lending transactions, net 15,400 16,600
Obligation to return securities received as collateral, at fair value, gross 14,700 49,900
Obligation to return securities received as collateral, at fair value, offsetting 0 0
Obligation to return securities received as collateral, at fair value, net 14,700 49,900
Total subject to enforceable master netting agreements, gross 62,300 92,500
Total subject to enforceable master netting agreements, offsetting (16,600) (7,900)
Total subject to enforceable master netting agreements, net 45,700 84,600
Total not subject to enforceable master netting agreements 4,600 3,100
Total, gross 66,900 95,600
Total, net 50,300 87,700
of which reported at fair value 13,213 13,594
Amounts not offset in the consolidated balance sheets    
Derivatives, net 6,300 10,700
Derivatives, financial instruments 1,300 2,200
Derivatives, cash collateral received/pledged 0 0
Derivatives, net exposure 5,000 8,500
Securities sold under repurchase agreements, net 15,600 18,100
Securities sold under repurchase agreements, financial instruments 15,500 18,100
Securities sold under repurchase agreements, cash collateral received/pledged 100 0
Securities sold under repurchase agreements, net exposure 0 0
Securities lending transactions, net 15,400 16,600
Securities lending transactions, financial instruments 15,300 16,300
Securities lending transactions, cash collateral received/pledged 0 0
Securities lending transactions, net exposure 100 300
Obligation to return securities received as collateral, at fair value, net 14,700 49,900
Obligation to return securities received as collateral, financial instruments 13,000 43,400
Obligation to return securities received as collateral, cash collateral received/pledged 0 0
Obligation to return securities received as collateral, at fair value, net exposure 1,700 6,500
Total financial liabilities subject to enforceable master netting agreements, net 52,000 95,300
Total financial liabilities subject to enforceable master netting agreements, financial instruments 45,100 80,000
Total financial liabilities subject to enforceable master netting agreements, cash collateral received/pledged 100 0
Total financial liabilities subject to enforceable master netting agreements, net exposure 6,800 15,300
Trading liabilities    
Offsetting of derivatives    
Total net derivatives presented in the consolidated balance sheets 10,600 17,500
Other liabilities    
Offsetting of derivatives    
Total net derivatives presented in the consolidated balance sheets 0 0
Securities sold under repurchase agreements and securities    
Offsetting of securities sold under repurchase agreements, securities lending transactions and obligation to return securities received as collateral    
Total subject to enforceable master netting agreements, offsetting (16,600) (7,900)
Total, gross 51,900 44,800
Total, net 35,300 36,900
Obligation to return securities received as collateral    
Offsetting of securities sold under repurchase agreements, securities lending transactions and obligation to return securities received as collateral    
Total subject to enforceable master netting agreements, offsetting 0 0
Total, gross 15,000 50,800
Total, net 15,000 50,800
OTC-cleared    
Offsetting of derivatives    
Derivative liabilities, gross, subject to enforceable master netting agreements 5,600 5,500
Offsetting (5,300) (5,400)
Total net derivatives subject to enforceable master netting agreements 300 100
Amounts not offset in the consolidated balance sheets    
Derivatives, net 300 100
OTC    
Offsetting of derivatives    
Derivative liabilities, gross, subject to enforceable master netting agreements 80,100 114,100
Offsetting (74,600) (104,300)
Total net derivatives subject to enforceable master netting agreements 5,500 9,800
Amounts not offset in the consolidated balance sheets    
Derivatives, net 5,500 9,800
Exchange-traded    
Offsetting of derivatives    
Derivative liabilities, gross, subject to enforceable master netting agreements 21,500 21,100
Offsetting (21,000) (20,300)
Total net derivatives subject to enforceable master netting agreements 500 800
Amounts not offset in the consolidated balance sheets    
Derivatives, net 500 800
Interest rate derivatives    
Offsetting of derivatives    
Derivative liabilities, gross, subject to enforceable master netting agreements 44,300 70,900
Interest rate derivatives | OTC-cleared    
Offsetting of derivatives    
Derivative liabilities, gross, subject to enforceable master netting agreements 4,000 4,600
Interest rate derivatives | OTC    
Offsetting of derivatives    
Derivative liabilities, gross, subject to enforceable master netting agreements 40,300 65,700
Interest rate derivatives | Exchange-traded    
Offsetting of derivatives    
Derivative liabilities, gross, subject to enforceable master netting agreements 0 600
Foreign exchange derivatives    
Offsetting of derivatives    
Derivative liabilities, gross, subject to enforceable master netting agreements 22,200 27,900
Foreign exchange derivatives | OTC-cleared    
Offsetting of derivatives    
Derivative liabilities, gross, subject to enforceable master netting agreements 200 200
Foreign exchange derivatives | OTC    
Offsetting of derivatives    
Derivative liabilities, gross, subject to enforceable master netting agreements 22,000 27,700
Equity/index-related derivatives    
Offsetting of derivatives    
Derivative liabilities, gross, subject to enforceable master netting agreements 34,400 35,500
Equity/index-related derivatives | OTC    
Offsetting of derivatives    
Derivative liabilities, gross, subject to enforceable master netting agreements 13,000 15,100
Equity/index-related derivatives | Exchange-traded    
Offsetting of derivatives    
Derivative liabilities, gross, subject to enforceable master netting agreements 21,400 20,400
Credit derivatives    
Offsetting of derivatives    
Derivative liabilities, gross, subject to enforceable master netting agreements 5,700 5,600
Credit derivatives | OTC-cleared    
Offsetting of derivatives    
Derivative liabilities, gross, subject to enforceable master netting agreements 1,400 700
Credit derivatives | OTC    
Offsetting of derivatives    
Derivative liabilities, gross, subject to enforceable master netting agreements 4,300 4,900
Other products    
Offsetting of derivatives    
Derivative liabilities, gross, subject to enforceable master netting agreements 600 800
Other products | OTC    
Offsetting of derivatives    
Derivative liabilities, gross, subject to enforceable master netting agreements 500 700
Other products | Exchange-traded    
Offsetting of derivatives    
Derivative liabilities, gross, subject to enforceable master netting agreements 100 100
Bank    
Offsetting of derivatives    
Derivative liabilities, gross, subject to enforceable master netting agreements 107,200 140,800
Offsetting (100,900) (130,100)
of which counterparty netting (83,000) (103,200)
of which cash collateral netting (17,900) (26,900)
Total net derivatives subject to enforceable master netting agreements 6,300 10,700
Total derivatives not subject to enforceable master netting agreements 4,300 6,800
Total net derivatives presented in the consolidated balance sheets 10,600 17,500
Offsetting of securities sold under repurchase agreements, securities lending transactions and obligation to return securities received as collateral    
Securities sold under repurchase agreements, gross 32,300 26,100
Securities sold under repurchase agreements, offsetting (16,600) (7,900)
Securities sold under repurchase agreements, net 15,700 18,200
Securities lending transactions, gross 15,400 16,600
Securities lending transactions, offsetting 0 0
Securities lending transactions, net 15,400 16,600
Obligation to return securities received as collateral, at fair value, gross 14,700 49,900
Obligation to return securities received as collateral, at fair value, offsetting 0 0
Obligation to return securities received as collateral, at fair value, net 14,700 49,900
Total subject to enforceable master netting agreements, gross 62,400 92,600
Total subject to enforceable master netting agreements, offsetting (16,600) (7,900)
Total subject to enforceable master netting agreements, net 45,800 84,700
Total not subject to enforceable master netting agreements 4,600 3,100
Total, gross 67,000 95,700
Total, net 50,400 87,800
of which reported at fair value 13,307 13,688
Amounts not offset in the consolidated balance sheets    
Derivatives, net 6,300 10,700
Derivatives, financial instruments 1,300 2,200
Derivatives, cash collateral received/pledged 0 0
Derivatives, net exposure 5,000 8,500
Securities sold under repurchase agreements, net 15,700 18,200
Securities sold under repurchase agreements, financial instruments 15,600 18,200
Securities sold under repurchase agreements, cash collateral received/pledged 100 0
Securities sold under repurchase agreements, net exposure 0 0
Securities lending transactions, net 15,400 16,600
Securities lending transactions, financial instruments 15,300 16,300
Securities lending transactions, cash collateral received/pledged 0 0
Securities lending transactions, net exposure 100 300
Obligation to return securities received as collateral, at fair value, net 14,700 49,900
Obligation to return securities received as collateral, financial instruments 13,000 43,400
Obligation to return securities received as collateral, cash collateral received/pledged 0 0
Obligation to return securities received as collateral, at fair value, net exposure 1,700 6,500
Total financial liabilities subject to enforceable master netting agreements, net 52,100 95,400
Total financial liabilities subject to enforceable master netting agreements, financial instruments 45,200 80,100
Total financial liabilities subject to enforceable master netting agreements, cash collateral received/pledged 100 0
Total financial liabilities subject to enforceable master netting agreements, net exposure 6,800 15,300
Bank | Trading liabilities    
Offsetting of derivatives    
Total net derivatives presented in the consolidated balance sheets 10,600 17,500
Bank | Other liabilities    
Offsetting of derivatives    
Total net derivatives presented in the consolidated balance sheets 0 0
Bank | Securities sold under repurchase agreements and securities    
Offsetting of securities sold under repurchase agreements, securities lending transactions and obligation to return securities received as collateral    
Total subject to enforceable master netting agreements, offsetting (16,600) (7,900)
Total, gross 52,000 44,900
Total, net 35,400 37,000
Bank | Obligation to return securities received as collateral    
Offsetting of securities sold under repurchase agreements, securities lending transactions and obligation to return securities received as collateral    
Total subject to enforceable master netting agreements, offsetting 0 0
Total, gross 15,000 50,800
Total, net 15,000 50,800
Bank | OTC-cleared    
Offsetting of derivatives    
Derivative liabilities, gross, subject to enforceable master netting agreements 5,600 5,500
Offsetting (5,300) (5,400)
Total net derivatives subject to enforceable master netting agreements 300 100
Amounts not offset in the consolidated balance sheets    
Derivatives, net 300 100
Bank | OTC    
Offsetting of derivatives    
Derivative liabilities, gross, subject to enforceable master netting agreements 80,100 114,200
Offsetting (74,600) (104,400)
Total net derivatives subject to enforceable master netting agreements 5,500 9,800
Amounts not offset in the consolidated balance sheets    
Derivatives, net 5,500 9,800
Bank | Exchange-traded    
Offsetting of derivatives    
Derivative liabilities, gross, subject to enforceable master netting agreements 21,500 21,100
Offsetting (21,000) (20,300)
Total net derivatives subject to enforceable master netting agreements 500 800
Amounts not offset in the consolidated balance sheets    
Derivatives, net 500 800
Bank | Interest rate derivatives    
Offsetting of derivatives    
Derivative liabilities, gross, subject to enforceable master netting agreements 44,300 70,900
Bank | Interest rate derivatives | OTC-cleared    
Offsetting of derivatives    
Derivative liabilities, gross, subject to enforceable master netting agreements 4,000 4,600
Bank | Interest rate derivatives | OTC    
Offsetting of derivatives    
Derivative liabilities, gross, subject to enforceable master netting agreements 40,300 65,700
Bank | Interest rate derivatives | Exchange-traded    
Offsetting of derivatives    
Derivative liabilities, gross, subject to enforceable master netting agreements 0 600
Bank | Foreign exchange derivatives    
Offsetting of derivatives    
Derivative liabilities, gross, subject to enforceable master netting agreements 22,200 27,900
Bank | Foreign exchange derivatives | OTC-cleared    
Offsetting of derivatives    
Derivative liabilities, gross, subject to enforceable master netting agreements 200 200
Bank | Foreign exchange derivatives | OTC    
Offsetting of derivatives    
Derivative liabilities, gross, subject to enforceable master netting agreements 22,000 27,700
Bank | Equity/index-related derivatives    
Offsetting of derivatives    
Derivative liabilities, gross, subject to enforceable master netting agreements 34,400 35,500
Bank | Equity/index-related derivatives | OTC    
Offsetting of derivatives    
Derivative liabilities, gross, subject to enforceable master netting agreements 13,000 15,100
Bank | Equity/index-related derivatives | Exchange-traded    
Offsetting of derivatives    
Derivative liabilities, gross, subject to enforceable master netting agreements 21,400 20,400
Bank | Credit derivatives    
Offsetting of derivatives    
Derivative liabilities, gross, subject to enforceable master netting agreements 5,700 5,600
Bank | Credit derivatives | OTC-cleared    
Offsetting of derivatives    
Derivative liabilities, gross, subject to enforceable master netting agreements 1,400 700
Bank | Credit derivatives | OTC    
Offsetting of derivatives    
Derivative liabilities, gross, subject to enforceable master netting agreements 4,300 4,900
Bank | Other products    
Offsetting of derivatives    
Derivative liabilities, gross, subject to enforceable master netting agreements 600 900
Bank | Other products | OTC    
Offsetting of derivatives    
Derivative liabilities, gross, subject to enforceable master netting agreements 500 800
Bank | Other products | Exchange-traded    
Offsetting of derivatives    
Derivative liabilities, gross, subject to enforceable master netting agreements SFr 100 SFr 100