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Expected credit loss measurement - On-balance sheet financial assets subject to ECL (Detail) - USD ($) $ in Millions | Jun. 30, 2021 | Mar. 31, 2021 | Dec. 31, 2020
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Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Total ECL allowances and provisions |  | $ (1,294) | $ (1,378) | $ (1,468)
Total on-balance sheet financial assets in scope of ECL requirements |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 715,496 | 706,460 | 695,603
Total financial assets measured at amortized cost |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 707,720 | 698,361 | 687,345
Cash and balances at central banks |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 160,672 | 158,914 | 158,231
Loans and advances to banks |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 16,500 | 18,448 | 15,444
Receivables from securities financing transactions |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 83,494 | 82,384 | 74,210
Cash collateral receivables on derivative instruments |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 29,785 | 35,046 | 32,737
Loans and advances to customers |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 390,126 | 376,798 | 379,528
Loans and advances to customers | Private clients with mortgages |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 147,827 | 142,611 | 148,175
Loans and advances to customers | Real estate financing |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 42,627 | 41,092 | 43,429
Loans and advances to customers | Large corporate clients |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 14,294 | 13,305 | 15,161
Loans and advances to customers | SME clients |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 14,116 | 14,034 | 14,872
Loans and advances to customers | Lombard |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 146,167 | 141,139 | 133,850
Loans and advances to customers | Credit cards |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 1,611 | 1,392 | 1,558
Loans and advances to customers | Commodity trade finance |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 3,399 | 3,695 | 3,269
Other financial assets measured at amortized cost |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 27,143 | 26,770 | 27,194
Loans to financial advisors |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 2,415 | 2,473 | 2,569
Financial assets measured at fair value through other comprehensive income |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 7,775 | 8,100 | 8,258
Twelve-month expected credit losses | Positions that are not credit impaired |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Total ECL allowances and provisions |  | (277) | (301) | (306)
Twelve-month expected credit losses | Positions that are not credit impaired | Total on-balance sheet financial assets in scope of ECL requirements |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 694,392 | 684,654 | 672,021
Twelve-month expected credit losses | Positions that are not credit impaired | Total financial assets measured at amortized cost |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 686,616 | 676,554 | 663,763
Twelve-month expected credit losses | Positions that are not credit impaired | Cash and balances at central banks |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 160,672 | 158,914 | 158,231
Twelve-month expected credit losses | Positions that are not credit impaired | Loans and advances to banks |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 16,457 | 18,387 | 15,260
Twelve-month expected credit losses | Positions that are not credit impaired | Receivables from securities financing transactions |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 83,494 | 82,385 | 74,210
Twelve-month expected credit losses | Positions that are not credit impaired | Cash collateral receivables on derivative instruments |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 29,785 | 35,046 | 32,737
Twelve-month expected credit losses | Positions that are not credit impaired | Loans and advances to customers |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 369,810 | 355,787 | 356,948
Twelve-month expected credit losses | Positions that are not credit impaired | Loans and advances to customers | Private clients with mortgages |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 137,851 | 132,636 | 138,769
Twelve-month expected credit losses | Positions that are not credit impaired | Loans and advances to customers | Real estate financing |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 37,950 | 36,099 | 37,568
Twelve-month expected credit losses | Positions that are not credit impaired | Loans and advances to customers | Large corporate clients |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 12,671 | 11,155 | 12,658
Twelve-month expected credit losses | Positions that are not credit impaired | Loans and advances to customers | SME clients |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 11,753 | 11,620 | 11,990
Twelve-month expected credit losses | Positions that are not credit impaired | Loans and advances to customers | Lombard |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 146,135 | 141,112 | 133,795
Twelve-month expected credit losses | Positions that are not credit impaired | Loans and advances to customers | Credit cards |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 1,255 | 1,063 | 1,198
Twelve-month expected credit losses | Positions that are not credit impaired | Loans and advances to customers | Commodity trade finance |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 3,345 | 3,663 | 3,214
Twelve-month expected credit losses | Positions that are not credit impaired | Other financial assets measured at amortized cost |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 26,398 | 26,036 | 26,377
Twelve-month expected credit losses | Positions that are not credit impaired | Loans to financial advisors |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 1,924 | 1,961 | 1,982
Twelve-month expected credit losses | Positions that are not credit impaired | Financial assets measured at fair value through other comprehensive income |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 7,775 | 8,100 | 8,258
Lifetime expected credit losses | Positions that are not credit impaired |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Total ECL allowances and provisions |  | (233) | (290) | (333)
Lifetime expected credit losses | Positions that are not credit impaired | Total on-balance sheet financial assets in scope of ECL requirements |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 18,882 | 19,371 | 20,873
Lifetime expected credit losses | Positions that are not credit impaired | Total financial assets measured at amortized cost |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 18,882 | 19,371 | 20,873
Lifetime expected credit losses | Positions that are not credit impaired | Cash and balances at central banks |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 0 | 0 | 0
Lifetime expected credit losses | Positions that are not credit impaired | Loans and advances to banks |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 42 | 61 | 184
Lifetime expected credit losses | Positions that are not credit impaired | Receivables from securities financing transactions |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 0 | 0 | 0
Lifetime expected credit losses | Positions that are not credit impaired | Cash collateral receivables on derivative instruments |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 0 | 0 | 0
Lifetime expected credit losses | Positions that are not credit impaired | Loans and advances to customers |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 18,403 | 18,995 | 20,341
Lifetime expected credit losses | Positions that are not credit impaired | Loans and advances to customers | Private clients with mortgages |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 9,140 | 9,118 | 8,448
Lifetime expected credit losses | Positions that are not credit impaired | Loans and advances to customers | Real estate financing |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 4,663 | 4,979 | 5,838
Lifetime expected credit losses | Positions that are not credit impaired | Loans and advances to customers | Large corporate clients |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 1,229 | 1,673 | 2,029
Lifetime expected credit losses | Positions that are not credit impaired | Loans and advances to customers | SME clients |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 1,814 | 1,886 | 2,254
Lifetime expected credit losses | Positions that are not credit impaired | Loans and advances to customers | Lombard |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 0 | 0 | 0
Lifetime expected credit losses | Positions that are not credit impaired | Loans and advances to customers | Credit cards |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 327 | 301 | 330
Lifetime expected credit losses | Positions that are not credit impaired | Loans and advances to customers | Commodity trade finance |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 38 | 16 | 43
Lifetime expected credit losses | Positions that are not credit impaired | Other financial assets measured at amortized cost |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 436 | 314 | 348
Lifetime expected credit losses | Positions that are not credit impaired | Loans to financial advisors |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 197 | 107 | 137
Lifetime expected credit losses | Positions that are not credit impaired | Financial assets measured at fair value through other comprehensive income |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 0 | 0 | 0
Lifetime expected credit losses | Credit-impaired positions |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Total ECL allowances and provisions |  | (784) | (787) | (829)
Lifetime expected credit losses | Credit-impaired positions | Total on-balance sheet financial assets in scope of ECL requirements |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 2,222 | 2,436 | 2,709
Lifetime expected credit losses | Credit-impaired positions | Total financial assets measured at amortized cost |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 2,222 | 2,436 | 2,709
Lifetime expected credit losses | Credit-impaired positions | Cash and balances at central banks |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 0 | 0 | 0
Lifetime expected credit losses | Credit-impaired positions | Loans and advances to banks |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 0 | 0 | 0
Lifetime expected credit losses | Credit-impaired positions | Receivables from securities financing transactions |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 0 | 0 | 0
Lifetime expected credit losses | Credit-impaired positions | Cash collateral receivables on derivative instruments |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 0 | 0 | 0
Lifetime expected credit losses | Credit-impaired positions | Loans and advances to customers |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 1,913 | 2,016 | 2,240
Lifetime expected credit losses | Credit-impaired positions | Loans and advances to customers | Private clients with mortgages |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 836 | 857 | 959
Lifetime expected credit losses | Credit-impaired positions | Loans and advances to customers | Real estate financing |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 14 | 15 | 23
Lifetime expected credit losses | Credit-impaired positions | Loans and advances to customers | Large corporate clients |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 395 | 477 | 474
Lifetime expected credit losses | Credit-impaired positions | Loans and advances to customers | SME clients |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 549 | 527 | 628
Lifetime expected credit losses | Credit-impaired positions | Loans and advances to customers | Lombard |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 32 | 27 | 55
Lifetime expected credit losses | Credit-impaired positions | Loans and advances to customers | Credit cards |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 28 | 28 | 30
Lifetime expected credit losses | Credit-impaired positions | Loans and advances to customers | Commodity trade finance |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 16 | 15 | 12
Lifetime expected credit losses | Credit-impaired positions | Other financial assets measured at amortized cost |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 309 | 420 | 469
Lifetime expected credit losses | Credit-impaired positions | Loans to financial advisors |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 295 | 405 | 450
Lifetime expected credit losses | Credit-impaired positions | Financial assets measured at fair value through other comprehensive income |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets | [1] | 0 | 0 | 0
Allowance for expected credit loss | Total on-balance sheet financial assets in scope of ECL requirements |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | (1,085) | (1,133) | (1,211)
Allowance for expected credit loss | Total financial assets measured at amortized cost |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | (1,085) | (1,133) | (1,211)
Allowance for expected credit loss | Cash and balances at central banks |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | 0 | 0 | 0
Allowance for expected credit loss | Loans and advances to banks |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | (8) | (12) | (16)
Allowance for expected credit loss | Receivables from securities financing transactions |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | (3) | (3) | (2)
Allowance for expected credit loss | Cash collateral receivables on derivative instruments |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | 0 | 0 | 0
Allowance for expected credit loss | Loans and advances to customers |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | (950) | (993) | (1,060)
Allowance for expected credit loss | Loans and advances to customers | Private clients with mortgages |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | (139) | (158) | (166)
Allowance for expected credit loss | Loans and advances to customers | Real estate financing |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | (49) | (56) | (63)
Allowance for expected credit loss | Loans and advances to customers | Large corporate clients |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | (246) | (271) | (279)
Allowance for expected credit loss | Loans and advances to customers | SME clients |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | (291) | (283) | (310)
Allowance for expected credit loss | Loans and advances to customers | Lombard |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | (35) | (34) | (36)
Allowance for expected credit loss | Loans and advances to customers | Credit cards |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | (34) | (33) | (38)
Allowance for expected credit loss | Loans and advances to customers | Commodity trade finance |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | (103) | (101) | (106)
Allowance for expected credit loss | Other financial assets measured at amortized cost |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | (124) | (125) | (133)
Allowance for expected credit loss | Loans to financial advisors |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | (103) | (104) | (108)
Allowance for expected credit loss | Financial assets measured at fair value through other comprehensive income |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | 0 | 0 | 0
Allowance for expected credit loss | Twelve-month expected credit losses | Positions that are not credit impaired | Total on-balance sheet financial assets in scope of ECL requirements |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | (163) | (180) | (187)
Allowance for expected credit loss | Twelve-month expected credit losses | Positions that are not credit impaired | Total financial assets measured at amortized cost |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | (163) | (180) | (187)
Allowance for expected credit loss | Twelve-month expected credit losses | Positions that are not credit impaired | Cash and balances at central banks |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | 0 | 0 | 0
Allowance for expected credit loss | Twelve-month expected credit losses | Positions that are not credit impaired | Loans and advances to banks |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | (6) | (8) | (9)
Allowance for expected credit loss | Twelve-month expected credit losses | Positions that are not credit impaired | Receivables from securities financing transactions |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | (3) | (3) | (2)
Allowance for expected credit loss | Twelve-month expected credit losses | Positions that are not credit impaired | Cash collateral receivables on derivative instruments |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | 0 | 0 | 0
Allowance for expected credit loss | Twelve-month expected credit losses | Positions that are not credit impaired | Loans and advances to customers |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | (124) | (138) | (142)
Allowance for expected credit loss | Twelve-month expected credit losses | Positions that are not credit impaired | Loans and advances to customers | Private clients with mortgages |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | (26) | (37) | (35)
Allowance for expected credit loss | Twelve-month expected credit losses | Positions that are not credit impaired | Loans and advances to customers | Real estate financing |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | (17) | (15) | (15)
Allowance for expected credit loss | Twelve-month expected credit losses | Positions that are not credit impaired | Loans and advances to customers | Large corporate clients |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | (20) | (28) | (27)
Allowance for expected credit loss | Twelve-month expected credit losses | Positions that are not credit impaired | Loans and advances to customers | SME clients |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | (20) | (19) | (19)
Allowance for expected credit loss | Twelve-month expected credit losses | Positions that are not credit impaired | Loans and advances to customers | Lombard |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | (6) | (5) | (5)
Allowance for expected credit loss | Twelve-month expected credit losses | Positions that are not credit impaired | Loans and advances to customers | Credit cards |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | (9) | (9) | (11)
Allowance for expected credit loss | Twelve-month expected credit losses | Positions that are not credit impaired | Loans and advances to customers | Commodity trade finance |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | (5) | (5) | (5)
Allowance for expected credit loss | Twelve-month expected credit losses | Positions that are not credit impaired | Other financial assets measured at amortized cost |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | (30) | (32) | (34)
Allowance for expected credit loss | Twelve-month expected credit losses | Positions that are not credit impaired | Loans to financial advisors |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | (23) | (26) | (27)
Allowance for expected credit loss | Twelve-month expected credit losses | Positions that are not credit impaired | Financial assets measured at fair value through other comprehensive income |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | 0 | 0 | 0
Allowance for expected credit loss | Lifetime expected credit losses | Positions that are not credit impaired | Total on-balance sheet financial assets in scope of ECL requirements |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | (166) | (195) | (229)
Allowance for expected credit loss | Lifetime expected credit losses | Positions that are not credit impaired | Total financial assets measured at amortized cost |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | (166) | (195) | (229)
Allowance for expected credit loss | Lifetime expected credit losses | Positions that are not credit impaired | Cash and balances at central banks |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | 0 | 0 | 0
Allowance for expected credit loss | Lifetime expected credit losses | Positions that are not credit impaired | Loans and advances to banks |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | (1) | (3) | (5)
Allowance for expected credit loss | Lifetime expected credit losses | Positions that are not credit impaired | Receivables from securities financing transactions |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | 0 | 0 | 0
Allowance for expected credit loss | Lifetime expected credit losses | Positions that are not credit impaired | Cash collateral receivables on derivative instruments |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | 0 | 0 | 0
Allowance for expected credit loss | Lifetime expected credit losses | Positions that are not credit impaired | Loans and advances to customers |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | (156) | (184) | (215)
Allowance for expected credit loss | Lifetime expected credit losses | Positions that are not credit impaired | Loans and advances to customers | Private clients with mortgages |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | (76) | (86) | (93)
Allowance for expected credit loss | Lifetime expected credit losses | Positions that are not credit impaired | Loans and advances to customers | Real estate financing |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | (32) | (41) | (44)
Allowance for expected credit loss | Lifetime expected credit losses | Positions that are not credit impaired | Loans and advances to customers | Large corporate clients |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | (19) | (28) | (40)
Allowance for expected credit loss | Lifetime expected credit losses | Positions that are not credit impaired | Loans and advances to customers | SME clients |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | (19) | (19) | (23)
Allowance for expected credit loss | Lifetime expected credit losses | Positions that are not credit impaired | Loans and advances to customers | Lombard |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | 0 | 0 | 0
Allowance for expected credit loss | Lifetime expected credit losses | Positions that are not credit impaired | Loans and advances to customers | Credit cards |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | (9) | (8) | (11)
Allowance for expected credit loss | Lifetime expected credit losses | Positions that are not credit impaired | Loans and advances to customers | Commodity trade finance |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | 0 | 0 | 0
Allowance for expected credit loss | Lifetime expected credit losses | Positions that are not credit impaired | Other financial assets measured at amortized cost |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | (9) | (7) | (9)
Allowance for expected credit loss | Lifetime expected credit losses | Positions that are not credit impaired | Loans to financial advisors |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | (6) | (4) | (5)
Allowance for expected credit loss | Lifetime expected credit losses | Positions that are not credit impaired | Financial assets measured at fair value through other comprehensive income |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | 0 | 0 | 0
Allowance for expected credit loss | Lifetime expected credit losses | Credit-impaired positions | Total on-balance sheet financial assets in scope of ECL requirements |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | (757) | (758) | (795)
Allowance for expected credit loss | Lifetime expected credit losses | Credit-impaired positions | Total financial assets measured at amortized cost |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | (757) | (758) | (795)
Allowance for expected credit loss | Lifetime expected credit losses | Credit-impaired positions | Cash and balances at central banks |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | 0 | 0 | 0
Allowance for expected credit loss | Lifetime expected credit losses | Credit-impaired positions | Loans and advances to banks |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | (1) | (1) | (1)
Allowance for expected credit loss | Lifetime expected credit losses | Credit-impaired positions | Receivables from securities financing transactions |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | 0 | 0 | 0
Allowance for expected credit loss | Lifetime expected credit losses | Credit-impaired positions | Cash collateral receivables on derivative instruments |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | 0 | 0 | 0
Allowance for expected credit loss | Lifetime expected credit losses | Credit-impaired positions | Loans and advances to customers |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | (670) | (671) | (703)
Allowance for expected credit loss | Lifetime expected credit losses | Credit-impaired positions | Loans and advances to customers | Private clients with mortgages |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | (37) | (35) | (39)
Allowance for expected credit loss | Lifetime expected credit losses | Credit-impaired positions | Loans and advances to customers | Real estate financing |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | 0 | 0 | (4)
Allowance for expected credit loss | Lifetime expected credit losses | Credit-impaired positions | Loans and advances to customers | Large corporate clients |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | (207) | (216) | (212)
Allowance for expected credit loss | Lifetime expected credit losses | Credit-impaired positions | Loans and advances to customers | SME clients |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | (253) | (246) | (268)
Allowance for expected credit loss | Lifetime expected credit losses | Credit-impaired positions | Loans and advances to customers | Lombard |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | (29) | (30) | (31)
Allowance for expected credit loss | Lifetime expected credit losses | Credit-impaired positions | Loans and advances to customers | Credit cards |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | (16) | (16) | (16)
Allowance for expected credit loss | Lifetime expected credit losses | Credit-impaired positions | Loans and advances to customers | Commodity trade finance |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | (98) | (96) | (101)
Allowance for expected credit loss | Lifetime expected credit losses | Credit-impaired positions | Other financial assets measured at amortized cost |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | (86) | (86) | (90)
Allowance for expected credit loss | Lifetime expected credit losses | Credit-impaired positions | Loans to financial advisors |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | (74) | (75) | (76)
Allowance for expected credit loss | Lifetime expected credit losses | Credit-impaired positions | Financial assets measured at fair value through other comprehensive income |  |  |  |
Disclosure Of Credit Risk Exposure [Line Items] |  |  |  |
Financial assets |  | $ 0 | $ 0 | $ 0
[1] | <div>The carrying amount of financial assets measured at amortized cost represents the total gross exposure net of the respective ECL allowances.</div>

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