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Expected credit loss measurement - Coverage ratios (Detail 2) - USD ($) $ in Millions | Jun. 30, 2023 | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | --- | ---
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 340,634 | $ 112,425 | $ 112,050
Financial Assets And Exposure To Credit Risk On Loan Commitments And Financial Guarantee Contracts In Core Loan Portfolio | $ 992,931 | $ 501,237 | $ 498,921
ECL coverage | 0.18% | 0.21% | 0.21%
Total |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 335,704 | $ 107,677 | $ 108,249
ECL coverage | 0.11% | 0.20% | 0.19%
Total | Private clients with mortgages |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 9,284 | $ 6,377 | $ 6,535
ECL coverage | 0.04% | 0.06% | 0.05%
Total | Real estate financing |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 18,031 | $ 9,298 | $ 10,054
ECL coverage | 0.07% | 0.07% | 0.06%
Total | Total real estate lending |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 27,315 | $ 15,675 | $ 16,589
ECL coverage | 0.06% | 0.06% | 0.06%
Total | Large corporate clients |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 90,393 | $ 31,375 | $ 32,126
ECL coverage | 0.25% | 0.38% | 0.38%
Total | SME clients |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 32,494 | $ 7,674 | $ 7,122
ECL coverage | 0.23% | 0.55% | 0.47%
Total | Total corporate lending |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 122,887 | $ 39,049 | $ 39,247
ECL coverage | 0.24% | 0.41% | 0.40%
Total | Lombard loans |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 91,235 | $ 12,456 | $ 12,919
ECL coverage | 0.00% | 0.01% | 0.02%
Total | Credit cards |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 9,763 | $ 9,567 | $ 9,390
ECL coverage | 0.07% | 0.08% | 0.07%
Total | Commodity trade finance |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 5,833 | $ 2,187 | $ 2,459
ECL coverage | 0.06% | 0.04% | 0.03%
Total | Ship / aircraft financing |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 1,731 |  |
ECL coverage | 0.04% |  |
Total | Consumer financing |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 301 |  |
ECL coverage | 0.34% |  |
Total | Financial intermediaries and hedge funds |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 46,786 | $ 17,260 | $ 15,841
ECL coverage | 0.03% | 0.08% | 0.09%
Total | Other off-balance sheet commitments |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 29,854 | $ 11,483 | $ 11,803
ECL coverage | 0.08% | 0.18% | 0.11%
Total | Total other lending |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 185,502 | $ 52,953 | $ 52,412
ECL coverage | 0.03% | 0.08% | 0.07%
Stage 1 and 2 positions |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
ECL coverage | 0.12% | 0.10% | 0.10%
Stage 1 and 2 positions | Total |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
ECL coverage | 0.10% | 0.17% | 0.16%
Stage 1 and 2 positions | Total | Private clients with mortgages |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
ECL coverage | 0.04% | 0.06% | 0.04%
Stage 1 and 2 positions | Total | Real estate financing |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
ECL coverage | 0.07% | 0.07% | 0.06%
Stage 1 and 2 positions | Total | Total real estate lending |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
ECL coverage | 0.06% | 0.06% | 0.06%
Stage 1 and 2 positions | Total | Large corporate clients |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
ECL coverage | 0.25% | 0.34% | 0.32%
Stage 1 and 2 positions | Total | SME clients |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
ECL coverage | 0.21% | 0.44% | 0.43%
Stage 1 and 2 positions | Total | Total corporate lending |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
ECL coverage | 0.24% | 0.36% | 0.34%
Stage 1 and 2 positions | Total | Lombard loans |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
ECL coverage | 0.00% | 0.01% | 0.01%
Stage 1 and 2 positions | Total | Credit cards |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
ECL coverage | 0.08% | 0.08% | 0.07%
Stage 1 and 2 positions | Total | Commodity trade finance |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
ECL coverage | 0.06% | 0.04% | 0.03%
Stage 1 and 2 positions | Total | Ship / aircraft financing |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
ECL coverage | 0.04% |  |
Stage 1 and 2 positions | Total | Consumer financing |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
ECL coverage | 0.34% |  |
Stage 1 and 2 positions | Total | Financial intermediaries and hedge funds |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
ECL coverage | 0.03% | 0.08% | 0.09%
Stage 1 and 2 positions | Total | Other off-balance sheet commitments |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
ECL coverage | 0.05% | 0.09% | 0.09%
Stage 1 and 2 positions | Total | Total other lending |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
ECL coverage | 0.02% | 0.06% | 0.06%
Twelve-month expected credit losses | Stage 1 and 2 positions |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 335,213 | $ 107,112 | $ 105,258
Financial Assets And Exposure To Credit Risk On Loan Commitments And Financial Guarantee Contracts In Core Loan Portfolio | $ 964,532 | $ 476,811 | $ 474,045
ECL coverage | 0.09% | 0.06% | 0.05%
Twelve-month expected credit losses | Stage 1 and 2 positions | Total |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 330,283 | $ 102,364 | $ 101,457
ECL coverage | 0.09% | 0.11% | 0.10%
Twelve-month expected credit losses | Stage 1 and 2 positions | Total | Private clients with mortgages |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 8,950 | $ 6,163 | $ 6,296
ECL coverage | 0.03% | 0.05% | 0.04%
Twelve-month expected credit losses | Stage 1 and 2 positions | Total | Real estate financing |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 17,751 | $ 9,101 | $ 9,779
ECL coverage | 0.07% | 0.08% | 0.07%
Twelve-month expected credit losses | Stage 1 and 2 positions | Total | Total real estate lending |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 26,701 | $ 15,263 | $ 16,075
ECL coverage | 0.06% | 0.07% | 0.06%
Twelve-month expected credit losses | Stage 1 and 2 positions | Total | Large corporate clients |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 87,307 | $ 28,390 | $ 28,950
ECL coverage | 0.21% | 0.18% | 0.18%
Twelve-month expected credit losses | Stage 1 and 2 positions | Total | SME clients |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 31,955 | $ 7,124 | $ 6,525
ECL coverage | 0.18% | 0.30% | 0.30%
Twelve-month expected credit losses | Stage 1 and 2 positions | Total | Total corporate lending |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 119,262 | $ 35,514 | $ 35,475
ECL coverage | 0.20% | 0.21% | 0.20%
Twelve-month expected credit losses | Stage 1 and 2 positions | Total | Lombard loans |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 91,234 | $ 12,455 | $ 12,918
ECL coverage | 0.00% | 0.01% | 0.01%
Twelve-month expected credit losses | Stage 1 and 2 positions | Total | Credit cards |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 9,274 | $ 9,078 | $ 8,900
ECL coverage | 0.06% | 0.06% | 0.05%
Twelve-month expected credit losses | Stage 1 and 2 positions | Total | Commodity trade finance |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 5,833 | $ 2,187 | $ 2,459
ECL coverage | 0.06% | 0.04% | 0.03%
Twelve-month expected credit losses | Stage 1 and 2 positions | Total | Ship / aircraft financing |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 1,731 |  |
ECL coverage | 0.03% |  |
Twelve-month expected credit losses | Stage 1 and 2 positions | Total | Consumer financing |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 301 |  |
ECL coverage | 0.34% |  |
Twelve-month expected credit losses | Stage 1 and 2 positions | Total | Financial intermediaries and hedge funds |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 46,406 | $ 16,781 | $ 14,177
ECL coverage | 0.03% | 0.05% | 0.07%
Twelve-month expected credit losses | Stage 1 and 2 positions | Total | Other off-balance sheet commitments |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 29,541 | $ 11,086 | $ 11,454
ECL coverage | 0.04% | 0.07% | 0.08%
Twelve-month expected credit losses | Stage 1 and 2 positions | Total | Total other lending |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 184,320 | $ 51,587 | $ 49,907
ECL coverage | 0.02% | 0.05% | 0.05%
Lifetime expected credit losses | Stage 1 and 2 positions |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 4,743 | $ 5,044 | $ 6,522
Financial Assets And Exposure To Credit Risk On Loan Commitments And Financial Guarantee Contracts In Core Loan Portfolio | $ 22,462 | $ 21,920 | $ 22,418
ECL coverage | 1.03% | 1.16% | 1.12%
Lifetime expected credit losses | Stage 1 and 2 positions | Total |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 4,743 | $ 5,044 | $ 6,522
ECL coverage | 1.14% | 1.43% | 1.06%
Lifetime expected credit losses | Stage 1 and 2 positions | Total | Private clients with mortgages |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 324 | $ 212 | $ 236
ECL coverage | 0.22% | 0.28% | 0.18%
Lifetime expected credit losses | Stage 1 and 2 positions | Total | Real estate financing |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 280 | $ 197 | $ 275
ECL coverage | 0.00% | 0.00% | 0.00%
Lifetime expected credit losses | Stage 1 and 2 positions | Total | Total real estate lending |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 603 | $ 409 | $ 511
ECL coverage | 0.00% | 0.00% | 0.02%
Lifetime expected credit losses | Stage 1 and 2 positions | Total | Large corporate clients |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 2,580 | $ 2,821 | $ 3,013
ECL coverage | 1.41% | 1.90% | 1.65%
Lifetime expected credit losses | Stage 1 and 2 positions | Total | SME clients |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 400 | $ 470 | $ 499
ECL coverage | 2.57% | 2.45% | 2.14%
Lifetime expected credit losses | Stage 1 and 2 positions | Total | Total corporate lending |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 2,980 | $ 3,290 | $ 3,513
ECL coverage | 1.56% | 1.98% | 1.72%
Lifetime expected credit losses | Stage 1 and 2 positions | Total | Lombard loans |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 0 | $ 0 | $ 0
ECL coverage | 0.00% | 0.00% | 0.00%
Lifetime expected credit losses | Stage 1 and 2 positions | Total | Credit cards |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 484 | $ 486 | $ 487
ECL coverage | 0.37% | 0.36% | 0.36%
Lifetime expected credit losses | Stage 1 and 2 positions | 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 1 and 2 positions | Total | Ship / aircraft financing |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 0 |  |
ECL coverage | 0.00% |  |
Lifetime expected credit losses | Stage 1 and 2 positions | Total | Consumer financing |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 0 |  |
ECL coverage | 0.00% |  |
Lifetime expected credit losses | Stage 1 and 2 positions | Total | Financial intermediaries and hedge funds |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 380 | $ 479 | $ 1,664
ECL coverage | 0.90% | 0.80% | 0.25%
Lifetime expected credit losses | Stage 1 and 2 positions | Total | Other off-balance sheet commitments |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 296 | $ 380 | $ 346
ECL coverage | 0.95% | 0.66% | 0.68%
Lifetime expected credit losses | Stage 1 and 2 positions | Total | Total other lending |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 1,160 | $ 1,345 | $ 2,498
ECL coverage | 0.71% | 0.60% | 0.33%
Lifetime expected credit losses | Stage 3 positions |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 261 | $ 269 | $ 270
Financial Assets And Exposure To Credit Risk On Loan Commitments And Financial Guarantee Contracts In Core Loan Portfolio | $ 2,862 | $ 2,506 | $ 2,458
ECL coverage | 21.73% | 22.02% | 22.42%
Lifetime expected credit losses | Stage 3 positions | Total |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 261 | $ 269 | $ 270
ECL coverage | 7.37% | 12.32% | 9.80%
Lifetime expected credit losses | Stage 3 positions | Total | Private clients with mortgages |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 11 | $ 3 | $ 3
ECL coverage | 0.60% | 3.40% | 11.83%
Lifetime expected credit losses | Stage 3 positions | 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 positions | Total | Total real estate lending |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 11 | $ 3 | $ 3
ECL coverage | 0.60% | 3.40% | 12.88%
Lifetime expected credit losses | Stage 3 positions | Total | Large corporate clients |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 138 | $ 165 | $ 163
ECL coverage | 1.32% | 8.30% | 12.63%
Lifetime expected credit losses | Stage 3 positions | Total | SME clients |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 95 | $ 80 | $ 98
ECL coverage | 9.94% | 11.14% | 3.04%
Lifetime expected credit losses | Stage 3 positions | Total | Total corporate lending |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 233 | $ 245 | $ 260
ECL coverage | 4.82% | 9.23% | 9.03%
Lifetime expected credit losses | Stage 3 positions | Total | Lombard loans |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 1 | $ 1 | $ 1
ECL coverage | 67.18% | 0.00% | 0.00%
Lifetime expected credit losses | Stage 3 positions | Total | Credit cards |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 4 | $ 3 | $ 3
ECL coverage | 0.00% | 0.00% | 0.00%
Lifetime expected credit losses | Stage 3 positions | 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 positions | Total | Ship / aircraft financing |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 0 |  |
ECL coverage | 0.00% |  |
Lifetime expected credit losses | Stage 3 positions | Total | Consumer financing |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 0 |  |
ECL coverage | 0.00% |  |
Lifetime expected credit losses | Stage 3 positions | 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 positions | Total | Other off-balance sheet commitments |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 11 | $ 17 | $ 3
ECL coverage | 64.08% | 0.00% | 0.00%
Lifetime expected credit losses | Stage 3 positions | Total | Total other lending |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 17 | $ 22 | $ 7
ECL coverage | 47.74% | 0.00% | 0.00%
Lifetime expected credit losses | Purchased credit-impaired (PCI) |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 417 |  |
Financial Assets And Exposure To Credit Risk On Loan Commitments And Financial Guarantee Contracts In Core Loan Portfolio | $ 3,075 |  |
ECL coverage | 0.94% |  |
Lifetime expected credit losses | Purchased credit-impaired (PCI) | Total |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 417 |  |
ECL coverage | 0.22% |  |
Lifetime expected credit losses | Purchased credit-impaired (PCI) | Total | Private clients with mortgages |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 0 |  |
ECL coverage | 0.00% |  |
Lifetime expected credit losses | Purchased credit-impaired (PCI) | Total | Real estate financing |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 0 |  |
ECL coverage | 0.00% |  |
Lifetime expected credit losses | Purchased credit-impaired (PCI) | Total | Total real estate lending |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 0 |  |
ECL coverage | 0.00% |  |
Lifetime expected credit losses | Purchased credit-impaired (PCI) | Total | Large corporate clients |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 369 |  |
ECL coverage | 0.05% |  |
Lifetime expected credit losses | Purchased credit-impaired (PCI) | Total | SME clients |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 43 |  |
ECL coverage | 0.00% |  |
Lifetime expected credit losses | Purchased credit-impaired (PCI) | Total | Total corporate lending |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 412 |  |
ECL coverage | 0.00% |  |
Lifetime expected credit losses | Purchased credit-impaired (PCI) | Total | Lombard loans |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 0 |  |
ECL coverage | 0.00% |  |
Lifetime expected credit losses | Purchased credit-impaired (PCI) | Total | Credit cards |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 0 |  |
ECL coverage | 0.00% |  |
Lifetime expected credit losses | Purchased credit-impaired (PCI) | Total | Commodity trade finance |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 0 |  |
ECL coverage | 0.00% |  |
Lifetime expected credit losses | Purchased credit-impaired (PCI) | Total | Ship / aircraft financing |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 0 |  |
ECL coverage | 0.00% |  |
Lifetime expected credit losses | Purchased credit-impaired (PCI) | Total | Consumer financing |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 0 |  |
ECL coverage | 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 |  |
ECL coverage | 0.00% |  |
Lifetime expected credit losses | Purchased credit-impaired (PCI) | Total | Other off-balance sheet commitments |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 6 |  |
ECL coverage | 42.44% |  |
Lifetime expected credit losses | Purchased credit-impaired (PCI) | Total | Total other lending |  |  |
Disclosure Of Provision Matrix [Line Items] |  |  |
Total exposure | $ 6 |  |
ECL coverage | 42.15% |  |

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