Restricted financial assets (Tables)	12 Months Ended
Restricted financial assets (Tables)	Dec. 31, 2023
Notes Disclosure Restricted Financial Assets Tables [Line Items]
Disclosure of restricted financial assets [text block]	Restricted financial assets USD m 31.12.23 31.12.22 Restricted financial assets of which: assets pledged as collateral that may be sold or repledged by counterparties Restricted financial assets of which: assets pledged as collateral that may be sold or repledged by counterparties Financial assets pledged as collateral Cash and balances at central banks 1 1,041 Financial assets at fair value held for trading 83,689 51,263 57,377 36,742 Loans and advances to customers 127,362 15,195 Financial assets at fair value not held for trading 3,099 2,110 1,509 1,220 Debt securities classified as Other financial assets measured at amortized cost 7,561 6,299 3,432 2,685 Total financial assets pledged as collateral 222,752 77,513 Other restricted financial assets Amounts due from banks 2,874 3,689 Financial assets at fair value held for trading 184 162 Cash collateral receivables on derivative instruments 9,539 5,155 Loans and advances to customers 275 1,127 Other financial assets measured at amortized cost 4,724 2 815 Financial assets at fair value not held for trading 18,229 14,478 Financial assets measured at fair value through other comprehensive income 1,846 1,842 Other 354 44 Total other restricted financial assets 38,025 27,312 Total financial assets pledged and other restricted financial assets 3 260,777 104,825 of which: Credit Suisse 4 114,611 1 Assets pledged to the depositor protection system in Switzerland following new requirements that became effective in 2023. 2 Predominantly includes cash collateral provided to exchanges and clearing houses to secure securities trading activity through those counterparties. 3 Does not include assets placed with central banks related to undrawn credit lines and for payment, clearing and settlement purposes (31 December 2023: USD 9.8 bn; 31 December 2022: USD 5.9 bn). 4 Refer to Note 2 for more information about the acquisition of the Credit Suisse Group.
Disclosure Of Financial Assets Transferred During Period Which Do Not Qualify For Derecognition Explanatory	Transferred financial assets subject to continued recognition in full USD m 31.12.23 31.12.22 Carrying amount of transferred assets Carrying amount of associated liabilities recognized on balance sheet Carrying amount of transferred assets Carrying amount of associated liabilities recognized on balance sheet Financial assets at fair value held for trading that may be sold or repledged by counterparties 51,263 23,765 36,742 16,470 Financial assets at fair value not held for trading that may be sold or repledged by counterparties 2,110 1,976 1,220 1,050 Debt securities classified as Other financial assets measured at amortized cost that may be sold or repledged by counterparties 6,299 5,928 2,685 2,302 Total financial assets transferred 59,672 31,669 40,647 19,822 of which: Credit Suisse 1 6,739 391 1 Refer to Note 2 for more information about the acquisition of the Credit Suisse Group.
Disclosure Of Off Balance Sheet Assets Received Table [Text Block]	Off-balance sheet assets received USD m 31.12.23 31.12.22 Fair value of assets received that can be sold or repledged of which: sold or repledged 2 Fair value of assets received that can be sold or repledged of which: sold or repledged 2 Fair value of assets received that can be sold or repledged 1 576,596 382,313 434,023 331,805 of which: Credit Suisse 3 88,068 26,697 1 Includes securities received as initial margin from its clients that UBS is required to remit to central counterparties, brokers and deposit banks through its exchange-traded derivative clearing and execution services. 2 Does not include off-balance sheet securities (31 December 2023: USD 29.1 bn; 31 December 2022: USD 9.9 bn) placed with central banks related to undrawn credit lines and for payment, clearing and settlement purposes for which there are no associated liabilities or contingent liabilities. 3 Refer to Note 2 for more information about the acquisition of the Credit Suisse Group.