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Expected credit loss measurement - Coverage ratios (Detail 2) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Disclosure Of Provision Matrix [Table]    
Total exposure $ 108,284 $ 105,116
Private clients with mortgages    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.03% 0.07%
Total exposure $ 9,123 $ 6,285
Real estate financing    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.09% 0.21%
Total exposure $ 8,766 $ 7,056
Large corporate clients    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.34% 0.46%
Total exposure $ 32,748 $ 32,828
SME clients    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.38% 0.40%
Total exposure $ 8,077 $ 9,121
Lombard    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.01% 0.02%
Total exposure $ 14,438 $ 14,178
Credit cards    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.07% 0.09%
Total exposure $ 9,466 $ 8,661
Commodity trade finance    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.04% 0.10%
Total exposure $ 3,262 $ 1,683
Financial intermediaries and hedge funds    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.15% 0.26%
Total exposure $ 12,153 $ 7,690
Guarantees    
Disclosure Of Provision Matrix [Table]    
Total exposure 20,972 17,081
Guarantees | Large corporate clients    
Disclosure Of Provision Matrix [Table]    
Total exposure 3,464 3,710
Guarantees | SME clients    
Disclosure Of Provision Matrix [Table]    
Total exposure 1,353 1,310
Guarantees | Lombard    
Disclosure Of Provision Matrix [Table]    
Total exposure 2,454 641
Guarantees | Commodity trade finance    
Disclosure Of Provision Matrix [Table]    
Total exposure 3,137 1,441
Guarantees | Financial intermediaries and hedge funds    
Disclosure Of Provision Matrix [Table]    
Total exposure 9,575 7,637
Irrevocable loan commitments    
Disclosure Of Provision Matrix [Table]    
Total exposure 39,478 41,372
Irrevocable loan commitments | Large corporate clients    
Disclosure Of Provision Matrix [Table]    
Total exposure 23,922 24,209
Forward starting reverse repurchase and securities borrowing agreements    
Disclosure Of Provision Matrix [Table]    
Total exposure 1,444 3,247
Committed unconditionally revocable credit lines    
Disclosure Of Provision Matrix [Table]    
Total exposure 40,778 40,134
Committed unconditionally revocable credit lines | Real estate financing    
Disclosure Of Provision Matrix [Table]    
Total exposure 7,328 6,328
Committed unconditionally revocable credit lines | Large corporate clients    
Disclosure Of Provision Matrix [Table]    
Total exposure 5,358 4,909
Committed unconditionally revocable credit lines | SME clients    
Disclosure Of Provision Matrix [Table]    
Total exposure 5,160 5,827
Committed unconditionally revocable credit lines | Lombard    
Disclosure Of Provision Matrix [Table]    
Total exposure 8,670 9,671
Committed unconditionally revocable credit lines | Credit cards    
Disclosure Of Provision Matrix [Table]    
Total exposure 9,466 8,661
Committed unconditionally revocable credit lines | Commodity trade finance    
Disclosure Of Provision Matrix [Table]    
Total exposure 117 242
Irrevocable committed prolongation of existing loans    
Disclosure Of Provision Matrix [Table]    
Total exposure $ 5,611 $ 3,282
Other off-balance sheet commitments    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.15% 0.13%
Total exposure $ 8,806 $ 14,366
Total    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.18% 0.25%
Total exposure $ 106,840 $ 101,869
Twelve-month expected credit losses | Positions that are not credit impaired    
Disclosure Of Provision Matrix [Table]    
Total exposure $ 101,971 $ 93,337
Twelve-month expected credit losses | Positions that are not credit impaired | Private clients with mortgages    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.03% 0.06%
Total exposure $ 8,798 $ 6,083
Twelve-month expected credit losses | Positions that are not credit impaired | Real estate financing    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.07% 0.09%
Total exposure $ 8,481 $ 6,576
Twelve-month expected credit losses | Positions that are not credit impaired | Large corporate clients    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.25% 0.27%
Total exposure $ 28,981 $ 25,026
Twelve-month expected credit losses | Positions that are not credit impaired | SME clients    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.19% 0.19%
Total exposure $ 7,276 $ 7,239
Twelve-month expected credit losses | Positions that are not credit impaired | Lombard    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.00% 0.01%
Total exposure $ 14,438 $ 14,170
Twelve-month expected credit losses | Positions that are not credit impaired | Credit cards    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.05% 0.08%
Total exposure $ 9,000 $ 8,220
Twelve-month expected credit losses | Positions that are not credit impaired | Commodity trade finance    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.04% 0.08%
Total exposure $ 3,262 $ 1,658
Twelve-month expected credit losses | Positions that are not credit impaired | Financial intermediaries and hedge funds    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.12% 0.13%
Total exposure $ 11,784 $ 7,242
Twelve-month expected credit losses | Positions that are not credit impaired | Guarantees    
Disclosure Of Provision Matrix [Table]    
Total exposure 19,695 14,687
Twelve-month expected credit losses | Positions that are not credit impaired | Guarantees | Large corporate clients    
Disclosure Of Provision Matrix [Table]    
Total exposure 2,567 2,048
Twelve-month expected credit losses | Positions that are not credit impaired | Guarantees | SME clients    
Disclosure Of Provision Matrix [Table]    
Total exposure 1,143 936
Twelve-month expected credit losses | Positions that are not credit impaired | Guarantees | Lombard    
Disclosure Of Provision Matrix [Table]    
Total exposure 2,454 633
Twelve-month expected credit losses | Positions that are not credit impaired | Guarantees | Commodity trade finance    
Disclosure Of Provision Matrix [Table]    
Total exposure 3,137 1,416
Twelve-month expected credit losses | Positions that are not credit impaired | Guarantees | Financial intermediaries and hedge funds    
Disclosure Of Provision Matrix [Table]    
Total exposure 9,491 7,413
Twelve-month expected credit losses | Positions that are not credit impaired | Irrevocable loan commitments    
Disclosure Of Provision Matrix [Table]    
Total exposure 37,097 36,894
Twelve-month expected credit losses | Positions that are not credit impaired | Irrevocable loan commitments | Large corporate clients    
Disclosure Of Provision Matrix [Table]    
Total exposure 21,811 20,195
Twelve-month expected credit losses | Positions that are not credit impaired | Forward starting reverse repurchase and securities borrowing agreements    
Disclosure Of Provision Matrix [Table]    
Total exposure 1,444 3,247
Twelve-month expected credit losses | Positions that are not credit impaired | Committed unconditionally revocable credit lines    
Disclosure Of Provision Matrix [Table]    
Total exposure 38,207 35,233
Twelve-month expected credit losses | Positions that are not credit impaired | Committed unconditionally revocable credit lines | Real estate financing    
Disclosure Of Provision Matrix [Table]    
Total exposure 7,046 5,811
Twelve-month expected credit losses | Positions that are not credit impaired | Committed unconditionally revocable credit lines | Large corporate clients    
Disclosure Of Provision Matrix [Table]    
Total exposure 4,599 2,783
Twelve-month expected credit losses | Positions that are not credit impaired | Committed unconditionally revocable credit lines | SME clients    
Disclosure Of Provision Matrix [Table]    
Total exposure 4,736 4,596
Twelve-month expected credit losses | Positions that are not credit impaired | Committed unconditionally revocable credit lines | Lombard    
Disclosure Of Provision Matrix [Table]    
Total exposure 8,670 9,671
Twelve-month expected credit losses | Positions that are not credit impaired | Committed unconditionally revocable credit lines | Credit cards    
Disclosure Of Provision Matrix [Table]    
Total exposure 9,000 8,220
Twelve-month expected credit losses | Positions that are not credit impaired | Committed unconditionally revocable credit lines | Commodity trade finance    
Disclosure Of Provision Matrix [Table]    
Total exposure 117 242
Twelve-month expected credit losses | Positions that are not credit impaired | Irrevocable committed prolongation of existing loans    
Disclosure Of Provision Matrix [Table]    
Total exposure $ 5,527 $ 3,277
Twelve-month expected credit losses | Positions that are not credit impaired | Other off-balance sheet commitments    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.06% 0.07%
Total exposure $ 8,507 $ 13,876
Twelve-month expected credit losses | Positions that are not credit impaired | Total    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.12% 0.13%
Total exposure $ 100,527 $ 90,090
Lifetime expected credit losses | Positions that are not credit impaired    
Disclosure Of Provision Matrix [Table]    
Total exposure $ 6,006 $ 11,396
Lifetime expected credit losses | Positions that are not credit impaired | Private clients with mortgages    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.09% 0.16%
Total exposure $ 276 $ 198
Lifetime expected credit losses | Positions that are not credit impaired | Real estate financing    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.88% 1.85%
Total exposure $ 285 $ 481
Lifetime expected credit losses | Positions that are not credit impaired | Large corporate clients    
Disclosure Of Provision Matrix [Table]    
ECL coverage 1.10% 0.92%
Total exposure $ 3,630 $ 7,598
Lifetime expected credit losses | Positions that are not credit impaired | SME clients    
Disclosure Of Provision Matrix [Table]    
ECL coverage 1.51% 0.63%
Total exposure $ 688 $ 1,734
Lifetime expected credit losses | Positions that are not credit impaired | Lombard    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.00% 0.00%
Total exposure $ 0 $ 0
Lifetime expected credit losses | Positions that are not credit impaired | Credit cards    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.34% 0.44%
Total exposure $ 462 $ 430
Lifetime expected credit losses | Positions that are not credit impaired | Commodity trade finance    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.00% 0.15%
Total exposure $ 0 $ 25
Lifetime expected credit losses | Positions that are not credit impaired | Financial intermediaries and hedge funds    
Disclosure Of Provision Matrix [Table]    
ECL coverage 1.20% 2.48%
Total exposure $ 369 $ 448
Lifetime expected credit losses | Positions that are not credit impaired | Guarantees    
Disclosure Of Provision Matrix [Table]    
Total exposure 1,127 2,225
Lifetime expected credit losses | Positions that are not credit impaired | Guarantees | Large corporate clients    
Disclosure Of Provision Matrix [Table]    
Total exposure 793 1,549
Lifetime expected credit losses | Positions that are not credit impaired | Guarantees | SME clients    
Disclosure Of Provision Matrix [Table]    
Total exposure 164 326
Lifetime expected credit losses | Positions that are not credit impaired | Guarantees | Lombard    
Disclosure Of Provision Matrix [Table]    
Total exposure 0 0
Lifetime expected credit losses | Positions that are not credit impaired | Guarantees | Commodity trade finance    
Disclosure Of Provision Matrix [Table]    
Total exposure 0 25
Lifetime expected credit losses | Positions that are not credit impaired | Guarantees | Financial intermediaries and hedge funds    
Disclosure Of Provision Matrix [Table]    
Total exposure 84 224
Lifetime expected credit losses | Positions that are not credit impaired | Irrevocable loan commitments    
Disclosure Of Provision Matrix [Table]    
Total exposure 2,335 4,374
Lifetime expected credit losses | Positions that are not credit impaired | Irrevocable loan commitments | Large corporate clients    
Disclosure Of Provision Matrix [Table]    
Total exposure 2,102 3,950
Lifetime expected credit losses | Positions that are not credit impaired | Forward starting reverse repurchase and securities borrowing agreements    
Disclosure Of Provision Matrix [Table]    
Total exposure 0 0
Lifetime expected credit losses | Positions that are not credit impaired | Committed unconditionally revocable credit lines    
Disclosure Of Provision Matrix [Table]    
Total exposure 2,508 4,792
Lifetime expected credit losses | Positions that are not credit impaired | Committed unconditionally revocable credit lines | Real estate financing    
Disclosure Of Provision Matrix [Table]    
Total exposure 281 517
Lifetime expected credit losses | Positions that are not credit impaired | Committed unconditionally revocable credit lines | Large corporate clients    
Disclosure Of Provision Matrix [Table]    
Total exposure 736 2,099
Lifetime expected credit losses | Positions that are not credit impaired | Committed unconditionally revocable credit lines | SME clients    
Disclosure Of Provision Matrix [Table]    
Total exposure 389 1,169
Lifetime expected credit losses | Positions that are not credit impaired | Committed unconditionally revocable credit lines | Lombard    
Disclosure Of Provision Matrix [Table]    
Total exposure 0 0
Lifetime expected credit losses | Positions that are not credit impaired | Committed unconditionally revocable credit lines | Credit cards    
Disclosure Of Provision Matrix [Table]    
Total exposure 462 430
Lifetime expected credit losses | Positions that are not credit impaired | Committed unconditionally revocable credit lines | Commodity trade finance    
Disclosure Of Provision Matrix [Table]    
Total exposure 0 0
Lifetime expected credit losses | Positions that are not credit impaired | Irrevocable committed prolongation of existing loans    
Disclosure Of Provision Matrix [Table]    
Total exposure $ 36 $ 5
Lifetime expected credit losses | Positions that are not credit impaired | Other off-balance sheet commitments    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.30% 0.11%
Total exposure $ 296 $ 482
Lifetime expected credit losses | Positions that are not credit impaired | Total    
Disclosure Of Provision Matrix [Table]    
ECL coverage 1.00% 0.91%
Total exposure $ 6,006 $ 11,396
Lifetime expected credit losses | Credit-impaired positions    
Disclosure Of Provision Matrix [Table]    
Total exposure $ 307 $ 382
Lifetime expected credit losses | Credit-impaired positions | Private clients with mortgages    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.15% 1.97%
Total exposure $ 49 $ 3
Lifetime expected credit losses | Credit-impaired positions | Real estate financing    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.00% 0.00%
Total exposure $ 0 $ 0
Lifetime expected credit losses | Credit-impaired positions | Large corporate clients    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.01% 5.65%
Total exposure $ 136 $ 205
Lifetime expected credit losses | Credit-impaired positions | SME clients    
Disclosure Of Provision Matrix [Table]    
ECL coverage 5.85% 7.79%
Total exposure $ 114 $ 148
Lifetime expected credit losses | Credit-impaired positions | Lombard    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.00% 19.41%
Total exposure $ 0 $ 8
Lifetime expected credit losses | Credit-impaired positions | Credit cards    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.00% 0.00%
Total exposure $ 4 $ 11
Lifetime expected credit losses | Credit-impaired positions | Commodity trade finance    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.00% 82.79%
Total exposure $ 0 $ 0
Lifetime expected credit losses | Credit-impaired positions | Financial intermediaries and hedge funds    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.00% 1.66%
Total exposure $ 0 $ 0
Lifetime expected credit losses | Credit-impaired positions | Guarantees    
Disclosure Of Provision Matrix [Table]    
Total exposure 150 170
Lifetime expected credit losses | Credit-impaired positions | Guarantees | Large corporate clients    
Disclosure Of Provision Matrix [Table]    
Total exposure 104 113
Lifetime expected credit losses | Credit-impaired positions | Guarantees | SME clients    
Disclosure Of Provision Matrix [Table]    
Total exposure 46 48
Lifetime expected credit losses | Credit-impaired positions | Guarantees | Lombard    
Disclosure Of Provision Matrix [Table]    
Total exposure 0 8
Lifetime expected credit losses | Credit-impaired positions | Guarantees | Commodity trade finance    
Disclosure Of Provision Matrix [Table]    
Total exposure 0 0
Lifetime expected credit losses | Credit-impaired positions | Guarantees | Financial intermediaries and hedge funds    
Disclosure Of Provision Matrix [Table]    
Total exposure 0 0
Lifetime expected credit losses | Credit-impaired positions | Irrevocable loan commitments    
Disclosure Of Provision Matrix [Table]    
Total exposure 46 104
Lifetime expected credit losses | Credit-impaired positions | Irrevocable loan commitments | Large corporate clients    
Disclosure Of Provision Matrix [Table]    
Total exposure 9 64
Lifetime expected credit losses | Credit-impaired positions | Forward starting reverse repurchase and securities borrowing agreements    
Disclosure Of Provision Matrix [Table]    
Total exposure 0 0
Lifetime expected credit losses | Credit-impaired positions | Committed unconditionally revocable credit lines    
Disclosure Of Provision Matrix [Table]    
Total exposure 63 108
Lifetime expected credit losses | Credit-impaired positions | Committed unconditionally revocable credit lines | Real estate financing    
Disclosure Of Provision Matrix [Table]    
Total exposure 0 0
Lifetime expected credit losses | Credit-impaired positions | Committed unconditionally revocable credit lines | Large corporate clients    
Disclosure Of Provision Matrix [Table]    
Total exposure 23 27
Lifetime expected credit losses | Credit-impaired positions | Committed unconditionally revocable credit lines | SME clients    
Disclosure Of Provision Matrix [Table]    
Total exposure 35 63
Lifetime expected credit losses | Credit-impaired positions | Committed unconditionally revocable credit lines | Lombard    
Disclosure Of Provision Matrix [Table]    
Total exposure 0 0
Lifetime expected credit losses | Credit-impaired positions | Committed unconditionally revocable credit lines | Credit cards    
Disclosure Of Provision Matrix [Table]    
Total exposure 4 11
Lifetime expected credit losses | Credit-impaired positions | Committed unconditionally revocable credit lines | Commodity trade finance    
Disclosure Of Provision Matrix [Table]    
Total exposure 0 0
Lifetime expected credit losses | Credit-impaired positions | Irrevocable committed prolongation of existing loans    
Disclosure Of Provision Matrix [Table]    
Total exposure $ 48 $ 0
Lifetime expected credit losses | Credit-impaired positions | Other off-balance sheet commitments    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.00% 124.14%
Total exposure $ 4 $ 8
Lifetime expected credit losses | Credit-impaired positions | Total    
Disclosure Of Provision Matrix [Table]    
ECL coverage 4.86% 8.94%
Total exposure $ 307 $ 382
UBS AG    
Disclosure Of Provision Matrix [Table]    
Total exposure $ 109,878 $ 107,059
UBS AG | Private clients with mortgages    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.03% 0.07%
Total exposure $ 9,123 $ 6,285
UBS AG | Real estate financing    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.09% 0.21%
Total exposure $ 8,766 $ 7,056
UBS AG | Large corporate clients    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.34% 0.46%
Total exposure $ 32,748 $ 32,828
UBS AG | SME clients    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.38% 0.40%
Total exposure $ 8,077 $ 9,121
UBS AG | Lombard    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.01% 0.02%
Total exposure $ 14,438 $ 14,178
UBS AG | Credit cards    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.07% 0.09%
Total exposure $ 9,466 $ 8,661
UBS AG | Commodity trade finance    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.04% 0.10%
Total exposure $ 3,262 $ 1,683
UBS AG | Financial intermediaries and hedge funds    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.13% 0.26%
Total exposure $ 13,747 $ 7,690
UBS AG | Guarantees    
Disclosure Of Provision Matrix [Table]    
Total exposure 20,972 17,081
UBS AG | Guarantees | Large corporate clients    
Disclosure Of Provision Matrix [Table]    
Total exposure 3,464 3,710
UBS AG | Guarantees | SME clients    
Disclosure Of Provision Matrix [Table]    
Total exposure 1,353 1,310
UBS AG | Guarantees | Lombard    
Disclosure Of Provision Matrix [Table]    
Total exposure 2,454 641
UBS AG | Guarantees | Commodity trade finance    
Disclosure Of Provision Matrix [Table]    
Total exposure 3,137 1,441
UBS AG | Guarantees | Financial intermediaries and hedge funds    
Disclosure Of Provision Matrix [Table]    
Total exposure 9,575 7,637
UBS AG | Irrevocable loan commitments    
Disclosure Of Provision Matrix [Table]    
Total exposure 39,478 41,372
UBS AG | Irrevocable loan commitments | Large corporate clients    
Disclosure Of Provision Matrix [Table]    
Total exposure 23,922 24,209
UBS AG | Forward starting reverse repurchase and securities borrowing agreements    
Disclosure Of Provision Matrix [Table]    
Total exposure 1,444 3,247
UBS AG | Committed unconditionally revocable credit lines    
Disclosure Of Provision Matrix [Table]    
Total exposure 42,373 42,077
UBS AG | Committed unconditionally revocable credit lines | Real estate financing    
Disclosure Of Provision Matrix [Table]    
Total exposure 7,328 6,328
UBS AG | Committed unconditionally revocable credit lines | Large corporate clients    
Disclosure Of Provision Matrix [Table]    
Total exposure 5,358 4,909
UBS AG | Committed unconditionally revocable credit lines | SME clients    
Disclosure Of Provision Matrix [Table]    
Total exposure 5,160 5,827
UBS AG | Committed unconditionally revocable credit lines | Lombard    
Disclosure Of Provision Matrix [Table]    
Total exposure 8,670 9,671
UBS AG | Committed unconditionally revocable credit lines | Credit cards    
Disclosure Of Provision Matrix [Table]    
Total exposure 9,466 8,661
UBS AG | Committed unconditionally revocable credit lines | Commodity trade finance    
Disclosure Of Provision Matrix [Table]    
Total exposure 117 242
UBS AG | Irrevocable committed prolongation of existing loans    
Disclosure Of Provision Matrix [Table]    
Total exposure $ 5,611 $ 3,282
UBS AG | Other off-balance sheet commitments    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.15% 0.12%
Total exposure $ 8,806 $ 16,309
UBS AG | Total    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.18% 0.25%
Total exposure $ 108,434 $ 103,812
UBS AG | Twelve-month expected credit losses | Positions that are not credit impaired    
Disclosure Of Provision Matrix [Table]    
Total exposure $ 103,565 $ 95,281
UBS AG | Twelve-month expected credit losses | Positions that are not credit impaired | Private clients with mortgages    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.03% 0.06%
Total exposure $ 8,798 $ 6,083
UBS AG | Twelve-month expected credit losses | Positions that are not credit impaired | Real estate financing    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.07% 0.09%
Total exposure $ 8,481 $ 6,576
UBS AG | Twelve-month expected credit losses | Positions that are not credit impaired | Large corporate clients    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.25% 0.27%
Total exposure $ 28,981 $ 25,026
UBS AG | Twelve-month expected credit losses | Positions that are not credit impaired | SME clients    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.19% 0.19%
Total exposure $ 7,276 $ 7,239
UBS AG | Twelve-month expected credit losses | Positions that are not credit impaired | Lombard    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.00% 0.01%
Total exposure $ 14,438 $ 14,170
UBS AG | Twelve-month expected credit losses | Positions that are not credit impaired | Credit cards    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.05% 0.08%
Total exposure $ 9,000 $ 8,220
UBS AG | Twelve-month expected credit losses | Positions that are not credit impaired | Commodity trade finance    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.04% 0.08%
Total exposure $ 3,262 $ 1,658
UBS AG | Twelve-month expected credit losses | Positions that are not credit impaired | Financial intermediaries and hedge funds    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.10% 0.13%
Total exposure $ 13,379 $ 7,270
UBS AG | Twelve-month expected credit losses | Positions that are not credit impaired | Guarantees    
Disclosure Of Provision Matrix [Table]    
Total exposure 19,695 14,687
UBS AG | Twelve-month expected credit losses | Positions that are not credit impaired | Guarantees | Large corporate clients    
Disclosure Of Provision Matrix [Table]    
Total exposure 2,567 2,048
UBS AG | Twelve-month expected credit losses | Positions that are not credit impaired | Guarantees | SME clients    
Disclosure Of Provision Matrix [Table]    
Total exposure 1,143 936
UBS AG | Twelve-month expected credit losses | Positions that are not credit impaired | Guarantees | Lombard    
Disclosure Of Provision Matrix [Table]    
Total exposure 2,454 633
UBS AG | Twelve-month expected credit losses | Positions that are not credit impaired | Guarantees | Commodity trade finance    
Disclosure Of Provision Matrix [Table]    
Total exposure 3,137 1,416
UBS AG | Twelve-month expected credit losses | Positions that are not credit impaired | Guarantees | Financial intermediaries and hedge funds    
Disclosure Of Provision Matrix [Table]    
Total exposure 9,491 7,413
UBS AG | Twelve-month expected credit losses | Positions that are not credit impaired | Irrevocable loan commitments    
Disclosure Of Provision Matrix [Table]    
Total exposure 37,097 36,894
UBS AG | Twelve-month expected credit losses | Positions that are not credit impaired | Irrevocable loan commitments | Large corporate clients    
Disclosure Of Provision Matrix [Table]    
Total exposure 21,811 20,195
UBS AG | Twelve-month expected credit losses | Positions that are not credit impaired | Forward starting reverse repurchase and securities borrowing agreements    
Disclosure Of Provision Matrix [Table]    
Total exposure 1,444 3,247
UBS AG | Twelve-month expected credit losses | Positions that are not credit impaired | Committed unconditionally revocable credit lines    
Disclosure Of Provision Matrix [Table]    
Total exposure 39,802 37,176
UBS AG | Twelve-month expected credit losses | Positions that are not credit impaired | Committed unconditionally revocable credit lines | Real estate financing    
Disclosure Of Provision Matrix [Table]    
Total exposure 7,046 5,811
UBS AG | Twelve-month expected credit losses | Positions that are not credit impaired | Committed unconditionally revocable credit lines | Large corporate clients    
Disclosure Of Provision Matrix [Table]    
Total exposure 4,599 2,783
UBS AG | Twelve-month expected credit losses | Positions that are not credit impaired | Committed unconditionally revocable credit lines | SME clients    
Disclosure Of Provision Matrix [Table]    
Total exposure 4,736 4,596
UBS AG | Twelve-month expected credit losses | Positions that are not credit impaired | Committed unconditionally revocable credit lines | Lombard    
Disclosure Of Provision Matrix [Table]    
Total exposure 8,670 9,671
UBS AG | Twelve-month expected credit losses | Positions that are not credit impaired | Committed unconditionally revocable credit lines | Credit cards    
Disclosure Of Provision Matrix [Table]    
Total exposure 9,000 8,220
UBS AG | Twelve-month expected credit losses | Positions that are not credit impaired | Committed unconditionally revocable credit lines | Commodity trade finance    
Disclosure Of Provision Matrix [Table]    
Total exposure 117 242
UBS AG | Twelve-month expected credit losses | Positions that are not credit impaired | Irrevocable committed prolongation of existing loans    
Disclosure Of Provision Matrix [Table]    
Total exposure $ 5,527 $ 3,277
UBS AG | Twelve-month expected credit losses | Positions that are not credit impaired | Other off-balance sheet commitments    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.06% 0.06%
Total exposure $ 8,507 $ 15,792
UBS AG | Twelve-month expected credit losses | Positions that are not credit impaired | Total    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.12% 0.13%
Total exposure $ 102,121 $ 92,034
UBS AG | Lifetime expected credit losses | Positions that are not credit impaired    
Disclosure Of Provision Matrix [Table]    
Total exposure $ 6,006 $ 11,396
UBS AG | Lifetime expected credit losses | Positions that are not credit impaired | Private clients with mortgages    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.09% 0.16%
Total exposure $ 276 $ 198
UBS AG | Lifetime expected credit losses | Positions that are not credit impaired | Real estate financing    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.88% 1.85%
Total exposure $ 285 $ 481
UBS AG | Lifetime expected credit losses | Positions that are not credit impaired | Large corporate clients    
Disclosure Of Provision Matrix [Table]    
ECL coverage 1.10% 0.92%
Total exposure $ 3,630 $ 7,598
UBS AG | Lifetime expected credit losses | Positions that are not credit impaired | SME clients    
Disclosure Of Provision Matrix [Table]    
ECL coverage 1.51% 0.63%
Total exposure $ 688 $ 1,734
UBS AG | Lifetime expected credit losses | Positions that are not credit impaired | Lombard    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.00% 0.00%
Total exposure $ 0 $ 0
UBS AG | Lifetime expected credit losses | Positions that are not credit impaired | Credit cards    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.34% 0.44%
Total exposure $ 462 $ 430
UBS AG | Lifetime expected credit losses | Positions that are not credit impaired | Commodity trade finance    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.00% 0.15%
Total exposure $ 0 $ 25
UBS AG | Lifetime expected credit losses | Positions that are not credit impaired | Financial intermediaries and hedge funds    
Disclosure Of Provision Matrix [Table]    
ECL coverage 1.20% 2.48%
Total exposure $ 369 $ 448
UBS AG | Lifetime expected credit losses | Positions that are not credit impaired | Guarantees    
Disclosure Of Provision Matrix [Table]    
Total exposure 1,127 2,225
UBS AG | Lifetime expected credit losses | Positions that are not credit impaired | Guarantees | Large corporate clients    
Disclosure Of Provision Matrix [Table]    
Total exposure 793 1,549
UBS AG | Lifetime expected credit losses | Positions that are not credit impaired | Guarantees | SME clients    
Disclosure Of Provision Matrix [Table]    
Total exposure 164 326
UBS AG | Lifetime expected credit losses | Positions that are not credit impaired | Guarantees | Lombard    
Disclosure Of Provision Matrix [Table]    
Total exposure 0 0
UBS AG | Lifetime expected credit losses | Positions that are not credit impaired | Guarantees | Commodity trade finance    
Disclosure Of Provision Matrix [Table]    
Total exposure 0 25
UBS AG | Lifetime expected credit losses | Positions that are not credit impaired | Guarantees | Financial intermediaries and hedge funds    
Disclosure Of Provision Matrix [Table]    
Total exposure 84 224
UBS AG | Lifetime expected credit losses | Positions that are not credit impaired | Irrevocable loan commitments    
Disclosure Of Provision Matrix [Table]    
Total exposure 2,335 4,374
UBS AG | Lifetime expected credit losses | Positions that are not credit impaired | Irrevocable loan commitments | Large corporate clients    
Disclosure Of Provision Matrix [Table]    
Total exposure 2,102 3,950
UBS AG | Lifetime expected credit losses | Positions that are not credit impaired | Forward starting reverse repurchase and securities borrowing agreements    
Disclosure Of Provision Matrix [Table]    
Total exposure 0 0
UBS AG | Lifetime expected credit losses | Positions that are not credit impaired | Committed unconditionally revocable credit lines    
Disclosure Of Provision Matrix [Table]    
Total exposure 2,508 4,792
UBS AG | Lifetime expected credit losses | Positions that are not credit impaired | Committed unconditionally revocable credit lines | Real estate financing    
Disclosure Of Provision Matrix [Table]    
Total exposure 281 517
UBS AG | Lifetime expected credit losses | Positions that are not credit impaired | Committed unconditionally revocable credit lines | Large corporate clients    
Disclosure Of Provision Matrix [Table]    
Total exposure 736 2,099
UBS AG | Lifetime expected credit losses | Positions that are not credit impaired | Committed unconditionally revocable credit lines | SME clients    
Disclosure Of Provision Matrix [Table]    
Total exposure 389 1,169
UBS AG | Lifetime expected credit losses | Positions that are not credit impaired | Committed unconditionally revocable credit lines | Lombard    
Disclosure Of Provision Matrix [Table]    
Total exposure 0 0
UBS AG | Lifetime expected credit losses | Positions that are not credit impaired | Committed unconditionally revocable credit lines | Credit cards    
Disclosure Of Provision Matrix [Table]    
Total exposure 462 430
UBS AG | Lifetime expected credit losses | Positions that are not credit impaired | Committed unconditionally revocable credit lines | Commodity trade finance    
Disclosure Of Provision Matrix [Table]    
Total exposure 0 0
UBS AG | Lifetime expected credit losses | Positions that are not credit impaired | Irrevocable committed prolongation of existing loans    
Disclosure Of Provision Matrix [Table]    
Total exposure $ 36 $ 5
UBS AG | Lifetime expected credit losses | Positions that are not credit impaired | Other off-balance sheet commitments    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.30% 0.11%
Total exposure $ 296 $ 482
UBS AG | Lifetime expected credit losses | Positions that are not credit impaired | Total    
Disclosure Of Provision Matrix [Table]    
ECL coverage 1.00% 0.91%
Total exposure $ 6,006 $ 11,396
UBS AG | Lifetime expected credit losses | Credit-impaired positions    
Disclosure Of Provision Matrix [Table]    
Total exposure $ 307 $ 382
UBS AG | Lifetime expected credit losses | Credit-impaired positions | Private clients with mortgages    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.15% 1.97%
Total exposure $ 49 $ 3
UBS AG | Lifetime expected credit losses | Credit-impaired positions | Real estate financing    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.00% 0.00%
Total exposure $ 0 $ 0
UBS AG | Lifetime expected credit losses | Credit-impaired positions | Large corporate clients    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.01% 5.65%
Total exposure $ 136 $ 205
UBS AG | Lifetime expected credit losses | Credit-impaired positions | SME clients    
Disclosure Of Provision Matrix [Table]    
ECL coverage 5.85% 7.79%
Total exposure $ 114 $ 148
UBS AG | Lifetime expected credit losses | Credit-impaired positions | Lombard    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.00% 19.41%
Total exposure $ 0 $ 8
UBS AG | Lifetime expected credit losses | Credit-impaired positions | Credit cards    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.00% 0.00%
Total exposure $ 4 $ 11
UBS AG | Lifetime expected credit losses | Credit-impaired positions | Commodity trade finance    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.00% 82.79%
Total exposure $ 0 $ 0
UBS AG | Lifetime expected credit losses | Credit-impaired positions | Financial intermediaries and hedge funds    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.00% 1.66%
Total exposure $ 0 $ 0
UBS AG | Lifetime expected credit losses | Credit-impaired positions | Guarantees    
Disclosure Of Provision Matrix [Table]    
Total exposure 150 170
UBS AG | Lifetime expected credit losses | Credit-impaired positions | Guarantees | Large corporate clients    
Disclosure Of Provision Matrix [Table]    
Total exposure 104 113
UBS AG | Lifetime expected credit losses | Credit-impaired positions | Guarantees | SME clients    
Disclosure Of Provision Matrix [Table]    
Total exposure 46 48
UBS AG | Lifetime expected credit losses | Credit-impaired positions | Guarantees | Lombard    
Disclosure Of Provision Matrix [Table]    
Total exposure 0 8
UBS AG | Lifetime expected credit losses | Credit-impaired positions | Guarantees | Commodity trade finance    
Disclosure Of Provision Matrix [Table]    
Total exposure 0 0
UBS AG | Lifetime expected credit losses | Credit-impaired positions | Guarantees | Financial intermediaries and hedge funds    
Disclosure Of Provision Matrix [Table]    
Total exposure 0 0
UBS AG | Lifetime expected credit losses | Credit-impaired positions | Irrevocable loan commitments    
Disclosure Of Provision Matrix [Table]    
Total exposure 46 104
UBS AG | Lifetime expected credit losses | Credit-impaired positions | Irrevocable loan commitments | Large corporate clients    
Disclosure Of Provision Matrix [Table]    
Total exposure 9 64
UBS AG | Lifetime expected credit losses | Credit-impaired positions | Forward starting reverse repurchase and securities borrowing agreements    
Disclosure Of Provision Matrix [Table]    
Total exposure 0 0
UBS AG | Lifetime expected credit losses | Credit-impaired positions | Committed unconditionally revocable credit lines    
Disclosure Of Provision Matrix [Table]    
Total exposure 63 108
UBS AG | Lifetime expected credit losses | Credit-impaired positions | Committed unconditionally revocable credit lines | Real estate financing    
Disclosure Of Provision Matrix [Table]    
Total exposure 0 0
UBS AG | Lifetime expected credit losses | Credit-impaired positions | Committed unconditionally revocable credit lines | Large corporate clients    
Disclosure Of Provision Matrix [Table]    
Total exposure 23 27
UBS AG | Lifetime expected credit losses | Credit-impaired positions | Committed unconditionally revocable credit lines | SME clients    
Disclosure Of Provision Matrix [Table]    
Total exposure 35 63
UBS AG | Lifetime expected credit losses | Credit-impaired positions | Committed unconditionally revocable credit lines | Lombard    
Disclosure Of Provision Matrix [Table]    
Total exposure 0 0
UBS AG | Lifetime expected credit losses | Credit-impaired positions | Committed unconditionally revocable credit lines | Credit cards    
Disclosure Of Provision Matrix [Table]    
Total exposure 4 11
UBS AG | Lifetime expected credit losses | Credit-impaired positions | Committed unconditionally revocable credit lines | Commodity trade finance    
Disclosure Of Provision Matrix [Table]    
Total exposure 0 0
UBS AG | Lifetime expected credit losses | Credit-impaired positions | Irrevocable committed prolongation of existing loans    
Disclosure Of Provision Matrix [Table]    
Total exposure $ 48 $ 0
UBS AG | Lifetime expected credit losses | Credit-impaired positions | Other off-balance sheet commitments    
Disclosure Of Provision Matrix [Table]    
ECL coverage 0.00% 124.14%
Total exposure $ 4 $ 8
UBS AG | Lifetime expected credit losses | Credit-impaired positions | Total    
Disclosure Of Provision Matrix [Table]    
ECL coverage 4.86% 8.94%
Total exposure $ 307 $ 382