v3.25.2
Expected credit loss measurement - Coverage ratios (Detail 2) - USD ($)
$ in Millions
Jun. 30, 2025
Mar. 31, 2025
Dec. 31, 2024
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 302,608 $ 288,458 $ 295,027
Total on- and off-balance sheet $ 933,577 $ 869,306 $ 854,839
ECL coverage 0.30% 0.28% 0.27%
Total      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 282,465 $ 270,279 $ 270,131
ECL coverage 0.14% 0.12% 0.12%
Total | Private clients with mortgages      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 11,178 $ 9,352 $ 8,473
ECL coverage 0.04% 0.04% 0.04%
Total | Real estate financing      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 9,734 $ 8,225 $ 8,694
ECL coverage 0.08% 0.08% 0.07%
Total | Total real estate lending      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 20,912 $ 17,578 $ 17,167
ECL coverage 0.06% 0.06% 0.06%
Total | Large corporate clients      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 71,511 $ 69,056 $ 69,892
ECL coverage 0.37% 0.27% 0.28%
Total | SME clients      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 17,371 $ 15,801 $ 13,944
ECL coverage 0.46% 0.47% 0.53%
Total | Total corporate lending      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 88,882 $ 84,857 $ 83,837
ECL coverage 0.39% 0.31% 0.32%
Total | Lombard      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 82,536 $ 79,638 $ 80,390
ECL coverage 0.01% 0.01% 0.01%
Total | Credit cards      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 11,566 $ 10,285 $ 10,074
ECL coverage 0.08% 0.08% 0.08%
Total | Commodity trade finance      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 2,230 $ 3,019 $ 3,487
ECL coverage 0.03% 0.02% 0.03%
Total | Ship / aircraft financing      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 2,430 $ 2,520 $ 2,669
ECL coverage 0.00% 0.00% 0.13%
Total | Consumer financing      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 327 $ 377 $ 134
ECL coverage 0.02% 0.03% 0.06%
Total | Financial intermediaries and hedge funds      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 28,287 $ 29,826 $ 19,609
ECL coverage 0.02% 0.01% 0.01%
Total | Other off-balance sheet commitments      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 45,295 $ 42,180 $ 52,765
ECL coverage 0.06% 0.09% 0.04%
Total | Total other lending      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 172,671 $ 167,845 $ 169,127
ECL coverage 0.03% 0.04% 0.02%
Stages 1 and 2      
Disclosure Of Provision Matrix [Line Items]      
ECL coverage 0.11% 0.10% 0.10%
Stages 1 and 2 | Total      
Disclosure Of Provision Matrix [Line Items]      
ECL coverage 0.11% 0.11% 0.11%
Stages 1 and 2 | Total | Private clients with mortgages      
Disclosure Of Provision Matrix [Line Items]      
ECL coverage 0.04% 0.04% 0.04%
Stages 1 and 2 | Total | Real estate financing      
Disclosure Of Provision Matrix [Line Items]      
ECL coverage 0.08% 0.08% 0.07%
Stages 1 and 2 | Total | Total real estate lending      
Disclosure Of Provision Matrix [Line Items]      
ECL coverage 0.06% 0.06% 0.06%
Stages 1 and 2 | Total | Large corporate clients      
Disclosure Of Provision Matrix [Line Items]      
ECL coverage 0.28% 0.24% 0.26%
Stages 1 and 2 | Total | SME clients      
Disclosure Of Provision Matrix [Line Items]      
ECL coverage 0.37% 0.41% 0.48%
Stages 1 and 2 | Total | Total corporate lending      
Disclosure Of Provision Matrix [Line Items]      
ECL coverage 0.30% 0.27% 0.30%
Stages 1 and 2 | Total | Lombard      
Disclosure Of Provision Matrix [Line Items]      
ECL coverage 0.01% 0.01% 0.00%
Stages 1 and 2 | Total | Credit cards      
Disclosure Of Provision Matrix [Line Items]      
ECL coverage 0.08% 0.08% 0.08%
Stages 1 and 2 | Total | Commodity trade finance      
Disclosure Of Provision Matrix [Line Items]      
ECL coverage 0.03% 0.02% 0.03%
Stages 1 and 2 | Total | Ship / aircraft financing      
Disclosure Of Provision Matrix [Line Items]      
ECL coverage 0.00% 0.00% 0.13%
Stages 1 and 2 | Total | Consumer financing      
Disclosure Of Provision Matrix [Line Items]      
ECL coverage 0.02% 0.03% 0.06%
Stages 1 and 2 | Total | Financial intermediaries and hedge funds      
Disclosure Of Provision Matrix [Line Items]      
ECL coverage 0.02% 0.01% 0.01%
Stages 1 and 2 | Total | Other off-balance sheet commitments      
Disclosure Of Provision Matrix [Line Items]      
ECL coverage 0.06% 0.07% 0.02%
Stages 1 and 2 | Total | Total other lending      
Disclosure Of Provision Matrix [Line Items]      
ECL coverage 0.03% 0.03% 0.02%
Twelve-month expected credit losses | Stages 1 and 2      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 293,863 $ 278,679 $ 286,776
Total on- and off-balance sheet $ 892,588 $ 830,678 $ 818,260
ECL coverage 0.06% 0.06% 0.06%
Twelve-month expected credit losses | Stages 1 and 2 | Total      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 273,720 $ 260,501 $ 261,880
ECL coverage 0.07% 0.07% 0.07%
Twelve-month expected credit losses | Stages 1 and 2 | Total | Private clients with mortgages      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 10,950 $ 9,083 $ 8,271
ECL coverage 0.03% 0.03% 0.04%
Twelve-month expected credit losses | Stages 1 and 2 | Total | Real estate financing      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 9,401 $ 7,851 $ 8,300
ECL coverage 0.09% 0.10% 0.06%
Twelve-month expected credit losses | Stages 1 and 2 | Total | Total real estate lending      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 20,351 $ 16,934 $ 16,571
ECL coverage 0.06% 0.06% 0.05%
Twelve-month expected credit losses | Stages 1 and 2 | Total | Large corporate clients      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 65,801 $ 64,495 $ 65,009
ECL coverage 0.17% 0.15% 0.17%
Twelve-month expected credit losses | Stages 1 and 2 | Total | SME clients      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 16,346 $ 14,290 $ 12,788
ECL coverage 0.22% 0.19% 0.30%
Twelve-month expected credit losses | Stages 1 and 2 | Total | Total corporate lending      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 82,148 $ 78,785 $ 77,797
ECL coverage 0.18% 0.16% 0.19%
Twelve-month expected credit losses | Stages 1 and 2 | Total | Lombard      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 82,424 $ 79,597 $ 80,235
ECL coverage 0.01% 0.01% 0.00%
Twelve-month expected credit losses | Stages 1 and 2 | Total | Credit cards      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 11,045 $ 9,815 $ 9,604
ECL coverage 0.06% 0.06% 0.06%
Twelve-month expected credit losses | Stages 1 and 2 | Total | Commodity trade finance      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 2,223 $ 3,001 $ 3,464
ECL coverage 0.03% 0.02% 0.03%
Twelve-month expected credit losses | Stages 1 and 2 | Total | Ship / aircraft financing      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 2,390 $ 2,486 $ 2,663
ECL coverage 0.00% 0.00% 0.13%
Twelve-month expected credit losses | Stages 1 and 2 | Total | Consumer financing      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 327 $ 377 $ 134
ECL coverage 0.02% 0.03% 0.06%
Twelve-month expected credit losses | Stages 1 and 2 | Total | Financial intermediaries and hedge funds      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 27,748 $ 28,309 $ 19,145
ECL coverage 0.02% 0.01% 0.01%
Twelve-month expected credit losses | Stages 1 and 2 | Total | Other off-balance sheet commitments      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 45,064 $ 41,197 $ 52,268
ECL coverage 0.05% 0.05% 0.02%
Twelve-month expected credit losses | Stages 1 and 2 | Total | Total other lending      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 171,221 $ 164,782 $ 167,512
ECL coverage 0.02% 0.02% 0.01%
Lifetime expected credit losses | Stages 1 and 2      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 8,108 $ 9,150 $ 7,572
Total on- and off-balance sheet $ 34,006 $ 31,969 $ 30,006
ECL coverage 1.27% 1.30% 1.42%
Lifetime expected credit losses | Stages 1 and 2 | Total      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 8,108 $ 9,150 $ 7,572
ECL coverage 1.46% 1.26% 1.35%
Lifetime expected credit losses | Stages 1 and 2 | Total | Private clients with mortgages      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 222 $ 264 $ 176
ECL coverage 0.25% 0.33% 0.22%
Lifetime expected credit losses | Stages 1 and 2 | Total | Real estate financing      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 333 $ 374 $ 394
ECL coverage 0.00% 0.00% 0.33%
Lifetime expected credit losses | Stages 1 and 2 | Total | Total real estate lending      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 555 $ 638 $ 570
ECL coverage 0.00% 0.00% 0.30%
Lifetime expected credit losses | Stages 1 and 2 | Total | Large corporate clients      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 5,392 $ 4,286 $ 4,612
ECL coverage 1.56% 1.60% 1.50%
Lifetime expected credit losses | Stages 1 and 2 | Total | SME clients      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 780 $ 1,268 $ 842
ECL coverage 3.58% 2.93% 3.24%
Lifetime expected credit losses | Stages 1 and 2 | Total | Total corporate lending      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 6,172 $ 5,554 $ 5,454
ECL coverage 1.82% 1.90% 1.77%
Lifetime expected credit losses | Stages 1 and 2 | Total | Lombard      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 75 $ 8 $ 120
ECL coverage 0.00% 0.14% 0.01%
Lifetime expected credit losses | Stages 1 and 2 | Total | Credit cards      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 518 $ 467 $ 467
ECL coverage 0.36% 0.37% 0.36%
Lifetime expected credit losses | Stages 1 and 2 | Total | Commodity trade finance      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 6 $ 17 $ 23
ECL coverage 0.46% 0.14% 0.51%
Lifetime expected credit losses | Stages 1 and 2 | Total | Ship / aircraft financing      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 41 $ 34 $ 6
ECL coverage 0.00% 0.00% 0.49%
Lifetime expected credit losses | Stages 1 and 2 | Total | Consumer financing      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 0 $ 0 $ 0
ECL coverage 0.00% 0.00% 0.00%
Lifetime expected credit losses | Stages 1 and 2 | Total | Financial intermediaries and hedge funds      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 539 $ 1,517 $ 464
ECL coverage 0.07% 0.03% 0.08%
Lifetime expected credit losses | Stages 1 and 2 | Total | Other off-balance sheet commitments      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 203 $ 914 $ 468
ECL coverage 2.07% 0.86% 0.28%
Lifetime expected credit losses | Stages 1 and 2 | Total | Total other lending      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 1,381 $ 2,958 $ 1,549
ECL coverage 0.47% 0.34% 0.23%
Lifetime expected credit losses | Stage 3      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 570 $ 551 $ 590
Total on- and off-balance sheet $ 5,950 $ 5,486 $ 5,421
ECL coverage 25.46% 23.90% 22.23%
Lifetime expected credit losses | Stage 3 | Total      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 570 $ 551 $ 590
ECL coverage 14.94% 8.59% 5.80%
Lifetime expected credit losses | Stage 3 | Total | Private clients with mortgages      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 6 $ 6 $ 25
ECL coverage 0.00% 4.21% 0.84%
Lifetime expected credit losses | Stage 3 | Total | Real estate financing      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 0 $ 0 $ 0
ECL coverage 0.00% 0.00% 0.00%
Lifetime expected credit losses | Stage 3 | Total | Total real estate lending      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 6 $ 6 $ 25
ECL coverage 0.00% 4.16% 0.84%
Lifetime expected credit losses | Stage 3 | Total | Large corporate clients      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 265 $ 225 $ 217
ECL coverage 23.59% 9.72% 5.88%
Lifetime expected credit losses | Stage 3 | Total | SME clients      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 237 $ 223 $ 287
ECL coverage 7.18% 4.75% 2.81%
Lifetime expected credit losses | Stage 3 | Total | Total corporate lending      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 503 $ 448 $ 504
ECL coverage 15.84% 7.25% 4.13%
Lifetime expected credit losses | Stage 3 | Total | Lombard      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 36 $ 33 $ 30
ECL coverage 15.08% 16.02% 17.64%
Lifetime expected credit losses | Stage 3 | Total | Credit cards      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 3 $ 3 $ 3
ECL coverage 0.00% 0.00% 0.00%
Lifetime expected credit losses | Stage 3 | Total | Commodity trade finance      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 0 $ 0 $ 0
ECL coverage 0.00% 0.00% 0.00%
Lifetime expected credit losses | Stage 3 | Total | Ship / aircraft financing      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 0 $ 0 $ 0
ECL coverage 0.00% 0.00% 0.00%
Lifetime expected credit losses | Stage 3 | Total | Consumer financing      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 0 $ 0 $ 0
ECL coverage 0.00% 0.00% 0.00%
Lifetime expected credit losses | Stage 3 | Total | Financial intermediaries and hedge funds      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 0 $ 0 $ 0
ECL coverage 0.00% 0.00% 0.00%
Lifetime expected credit losses | Stage 3 | Total | Other off-balance sheet commitments      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 22 $ 61 $ 27
ECL coverage 0.46% 15.36% 29.03%
Lifetime expected credit losses | Stage 3 | Total | Total other lending      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 61 $ 97 $ 61
ECL coverage 9.03% 15.06% 21.71%
Lifetime expected credit losses | Purchased credit-impaired (PCI)      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 67 $ 78 $ 89
Total on- and off-balance sheet $ 1,033 $ 1,172 $ 1,153
ECL coverage 28.52% 24.16% 21.31%
Lifetime expected credit losses | Purchased credit-impaired (PCI) | Total      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 67 $ 78 $ 89
ECL coverage 2.29% 2.28% 1.71%
Lifetime expected credit losses | Purchased credit-impaired (PCI) | Total | Private clients with mortgages      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 0 $ 0 $ 1
ECL coverage 0.00% 0.00% 0.00%
Lifetime expected credit losses | Purchased credit-impaired (PCI) | Total | Real estate financing      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 0 $ 0 $ 0
ECL coverage 0.00% 0.00% 0.00%
Lifetime expected credit losses | Purchased credit-impaired (PCI) | Total | Total real estate lending      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 0 $ 0 $ 1
ECL coverage 0.00% 0.00% 0.00%
Lifetime expected credit losses | Purchased credit-impaired (PCI) | Total | Large corporate clients      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 53 $ 49 $ 54
ECL coverage 2.71% 3.13% 2.90%
Lifetime expected credit losses | Purchased credit-impaired (PCI) | Total | SME clients      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 7 $ 21 $ 27
ECL coverage 4.25% 1.90% 0.00%
Lifetime expected credit losses | Purchased credit-impaired (PCI) | Total | Total corporate lending      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 60 $ 70 $ 81
ECL coverage 2.89% 2.77% 1.86%
Lifetime expected credit losses | Purchased credit-impaired (PCI) | Total | Lombard      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 0 $ 0 $ 4
ECL coverage 0.00% 0.00% 0.00%
Lifetime expected credit losses | Purchased credit-impaired (PCI) | Total | Credit cards      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 0 $ 0 $ 0
ECL coverage 0.00% 0.00% 0.00%
Lifetime expected credit losses | Purchased credit-impaired (PCI) | Total | Commodity trade finance      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 0 $ 0 $ 0
ECL coverage 0.00% 0.00% 0.00%
Lifetime expected credit losses | Purchased credit-impaired (PCI) | Total | Ship / aircraft financing      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 0 $ 0 $ 0
ECL coverage 0.00% 0.00% 0.00%
Lifetime expected credit losses | Purchased credit-impaired (PCI) | Total | Consumer financing      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 0 $ 0 $ 0
ECL coverage 0.00% 0.00% 0.00%
Lifetime expected credit losses | Purchased credit-impaired (PCI) | Total | Financial intermediaries and hedge funds      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 0 $ 0 $ 0
ECL coverage 0.00% 0.00% 0.00%
Lifetime expected credit losses | Purchased credit-impaired (PCI) | Total | Other off-balance sheet commitments      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 7 $ 8 $ 2
ECL coverage 0.00% 0.00% 0.00%
Lifetime expected credit losses | Purchased credit-impaired (PCI) | Total | Total other lending      
Disclosure Of Provision Matrix [Line Items]      
Total exposure $ 7 $ 8 $ 6
ECL coverage 0.00% 0.00% 0.00%