v3.25.4
Report of Directors Financial Review Risk Report - Reconciliation of changes in gross carrying/nominal amount and allowances for loans and advances to banks and customers including loan commitments and financial guarantees (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan $ 2,923,319  
Balance at 31 Dec 3,117,161 $ 2,923,319
Assets held for sale    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 3,019  
Balance at 31 Dec 261 3,019
Financial assets at amortised cost, category    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 153,973  
Balance at 31 Dec 182,089 153,973
Reverse Repurchase Agreement, Non-trading    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 252,549  
Balance at 31 Dec 298,392 252,549
Debt securities | Financial assets at amortised cost, category    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 131,825  
Balance at 31 Dec 158,644 131,825
Loans and advances to customers    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 930,658  
Balance at 31 Dec 988,399 930,658
IFRS 9 | Assets held for sale    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 3,269  
Balance at 31 Dec 4,088 3,269
IFRS 9 | Financial assets measured at fair value through other comprehensive income, category    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 353,855  
Balance at 31 Dec 386,370 353,855
IFRS 9 | Reverse Repurchase Agreement, Non-trading | Financial assets at amortised cost, category    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 252,549  
Balance at 31 Dec 298,392 252,549
IFRS 9 | Debt securities | Financial assets measured at fair value through other comprehensive income, category    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 353,855  
Balance at 31 Dec 386,370 353,855
IFRS 9 | Loans and advances to customers | Financial assets at amortised cost, category    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 930,658  
Balance at 31 Dec 988,399 930,658
– stage 1 | Financial instruments not credit-impaired | IFRS 9 | Debt securities | Financial assets measured at fair value through other comprehensive income, category    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 352,971  
Balance at 31 Dec 385,476 352,971
– stage 1 | Financial instruments not credit-impaired | IFRS 9 | Loans and advances to customers | Financial assets at amortised cost, category    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 823,342  
Balance at 31 Dec 892,232 823,342
Lifetime expected credit losses | Financial instruments not credit-impaired | IFRS 9 | Debt securities | Financial assets measured at fair value through other comprehensive income, category    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 884  
Balance at 31 Dec 894 884
Lifetime expected credit losses | Financial instruments not credit-impaired | IFRS 9 | Loans and advances to customers | Financial assets at amortised cost, category    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 90,702  
Balance at 31 Dec 78,618 90,702
Lifetime expected credit losses | Financial instruments credit-impaired | IFRS 9 | Debt securities | Financial assets measured at fair value through other comprehensive income, category    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 0  
Balance at 31 Dec 0 0
Lifetime expected credit losses | Financial instruments credit-impaired | IFRS 9 | Loans and advances to customers | Financial assets at amortised cost, category    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 16,575  
Balance at 31 Dec 17,292 16,575
Lifetime expected credit losses | – POCI | IFRS 9 | Debt securities | Financial assets measured at fair value through other comprehensive income, category    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 0  
Balance at 31 Dec 0 0
Lifetime expected credit losses | – POCI | IFRS 9 | Loans and advances to customers | Financial assets at amortised cost, category    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 39  
Balance at 31 Dec 257 39
Gross carrying amount    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 2,350,371  
Balance at 31 Dec 2,486,661 2,350,371
Gross carrying amount | Assets held for sale    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 3,019  
Balance at 31 Dec 261 3,019
Gross carrying amount | Financial assets at amortised cost, category    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 2,507,370  
Balance at 31 Dec 2,706,154 2,507,370
Gross carrying amount | Financial instruments including loan commitments and financial guarantees    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 1,678,790  
Balance at 31 Dec 1,815,828 1,678,790
Gross carrying amount | Loans and advances to banks and customers, including loan commitments and financial guarantees    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 1,629,501  
Changes due to modifications not derecognised 0  
Net new and further lending/repayments 66,068  
Assets written off 3,569  
Credit-related modifications that resulted in derecognition (88)  
Foreign exchange and others 48,544  
Balance at 31 Dec 1,740,456 1,629,501
Gross carrying amount | Loans and advances to banks and customers, including loan commitments and financial guarantees | Wholesale    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 927,594 965,135
Net new and further lending/repayments 33,778 23,759
Assets written off 1,928 2,925
Credit-related modifications that resulted in derecognition (88) 0
Foreign exchange and others 32,595 (58,375)
Balance at 31 Dec 991,951 927,594
Gross carrying amount | Loans and advances to banks and customers, including loan commitments and financial guarantees | Assets held for sale    
Increase (decrease) in financial assets [abstract]    
Others (6,000)  
Gross carrying amount | Loans and advances to banks and customers, including loan commitments and financial guarantees | Assets held for sale | Wholesale    
Increase (decrease) in financial assets [abstract]    
Others 3,300 2,900
Gross carrying amount | Loans and advances to banks and customers, including loan commitments and financial guarantees | Assets held for sale | Retained home and other loan portfolio    
Increase (decrease) in financial assets [abstract]    
Others (7,200)  
Gross carrying amount | Loans and advances to banks and customers, including loan commitments and financial guarantees | Assets held for sale | Banking business in Canada | Wholesale    
Increase (decrease) in financial assets [abstract]    
Others   (28,900)
Gross carrying amount | Loans and advances to banks and customers, including loan commitments and financial guarantees | Assets held for sale | Banking business in Canada | Personal lending    
Increase (decrease) in financial assets [abstract]    
Others   (6,400)
Gross carrying amount | Loans and advances to banks and customers, including loan commitments and financial guarantees | Assets held for sale | Argentina business | Personal lending    
Increase (decrease) in financial assets [abstract]    
Others   (2,400)
Gross carrying amount | Debt securities | Financial assets measured at fair value through other comprehensive income, category    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 346,124  
Balance at 31 Dec 383,568 346,124
Gross carrying amount | Loans and advances to customers, including loan commitments and financial guarantees | Personal lending    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 701,907 705,638
Net new and further lending/repayments 32,290 21,104
Assets written off 1,641 1,534
Foreign exchange and others 15,949 (23,276)
Balance at 31 Dec 748,505 701,907
Gross carrying amount | Loans and advances to customers, including loan commitments and financial guarantees | Personal lending | Other instruments    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 160,001 163,814
Net new and further lending/repayments 14,209 5,474
Assets written off 731 735
Foreign exchange and others (2,959) (8,529)
Balance at 31 Dec 170,520 160,001
Gross carrying amount | Loans and advances to customers, including loan commitments and financial guarantees | Personal lending | Mortgages    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 381,491 381,535
Net new and further lending/repayments 13,233 7,149
Assets written off 63 63
Foreign exchange and others 14,620 (7,130)
Balance at 31 Dec 409,281 381,491
Gross carrying amount | Loans and advances to customers, including loan commitments and financial guarantees | Banking Business In Canada & Business In Argentina | Personal lending | Other instruments    
Increase (decrease) in financial assets [abstract]    
Foreign exchange and others (4,500)  
Gross carrying amount | Loans and advances to customers, including loan commitments and financial guarantees | Assets held for sale | Personal lending    
Increase (decrease) in financial assets [abstract]    
Foreign exchange and others (2,700) (800)
Gross carrying amount | Loans and advances to customers, including loan commitments and financial guarantees | Assets held for sale | Personal lending | Other instruments    
Increase (decrease) in financial assets [abstract]    
Foreign exchange and others (400) (300)
Gross carrying amount | Loans and advances to customers, including loan commitments and financial guarantees | Assets held for sale | Personal lending | Mortgages    
Increase (decrease) in financial assets [abstract]    
Foreign exchange and others (2,300)  
Gross carrying amount | Loans and advances to customers, including loan commitments and financial guarantees | Assets held for sale | Retained home and other loan portfolio | Personal lending | Other instruments    
Increase (decrease) in financial assets [abstract]    
Foreign exchange and others (6,800)  
Gross carrying amount | Loans and advances to customers, including loan commitments and financial guarantees | Assets held for sale | Banking business in Canada | Personal lending | Other instruments    
Increase (decrease) in financial assets [abstract]    
Foreign exchange and others   (4,400)
Gross carrying amount | Loans and advances to customers | Assets held for sale | Retained home and other loan portfolio | Personal lending | Mortgages    
Increase (decrease) in financial assets [abstract]    
Foreign exchange and others (400)  
Gross carrying amount | Loans and advances to customers | Financial assets at amortised cost, category    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 940,373  
Balance at 31 Dec 999,091 940,373
Gross carrying amount | IFRS 9 | Assets held for sale    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 3,273  
Balance at 31 Dec 4,115 3,273
Gross carrying amount | IFRS 9 | Financial assets measured at fair value through other comprehensive income, category    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 353,909  
Balance at 31 Dec 386,400 353,909
Gross carrying amount | IFRS 9 | Financial instruments including loan commitments and financial guarantees    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 2,507,370  
Balance at 31 Dec 2,706,154 2,507,370
Gross carrying amount | IFRS 9 | Reverse Repurchase Agreement, Non-trading    
Increase (decrease) in financial assets [abstract]    
Balance at 31 Dec 75,372  
Gross carrying amount | IFRS 9 | Reverse Repurchase Agreement, Non-trading | Financial assets at amortised cost, category    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 252,549  
Balance at 31 Dec 298,392 252,549
Gross carrying amount | IFRS 9 | Debt securities | Financial assets measured at fair value through other comprehensive income, category    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 353,909  
Balance at 31 Dec 386,400 353,909
Gross carrying amount | IFRS 9 | Loans and advances to customers | Financial assets at amortised cost, category    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 940,373  
Balance at 31 Dec 999,091 940,373
Gross carrying amount | – stage 1 | Financial instruments not credit-impaired | Financial assets at amortised cost, category    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 2,365,477  
Balance at 31 Dec 2,575,821 2,365,477
Gross carrying amount | – stage 1 | Financial instruments not credit-impaired | Loans and advances to banks and customers, including loan commitments and financial guarantees    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 1,489,687  
Transfers of financial instruments: (28,196)  
transfers from stage 1 to stage 2 (134,309)  
transfers from stage 2 to stage 1 107,223  
– transfers to stage 3 (1,873)  
– transfers from stage 3 763  
Net new and further lending/repayments 107,733  
Foreign exchange and others 42,772  
Balance at 31 Dec 1,611,996 1,489,687
Gross carrying amount | – stage 1 | Financial instruments not credit-impaired | Loans and advances to banks and customers, including loan commitments and financial guarantees | Wholesale    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 833,036 845,982
Transfers of financial instruments: (35,399) (17,606)
Net new and further lending/repayments 66,354 58,044
Foreign exchange and others 29,369 (53,384)
Balance at 31 Dec 893,360 833,036
Gross carrying amount | – stage 1 | Financial instruments not credit-impaired | Loans and advances to customers, including loan commitments and financial guarantees | Personal lending    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 656,651 650,823
Transfers of financial instruments: 7,203 (2,023)
Net new and further lending/repayments 41,379 29,789
Foreign exchange and others 13,403 (21,938)
Balance at 31 Dec 718,636 656,651
Gross carrying amount | – stage 1 | Financial instruments not credit-impaired | Loans and advances to customers, including loan commitments and financial guarantees | Personal lending | Other instruments    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 155,663 156,767
Transfers of financial instruments: (1,310) 742
Net new and further lending/repayments 15,130 6,177
Foreign exchange and others (2,969) (8,023)
Balance at 31 Dec 166,514 155,663
Gross carrying amount | – stage 1 | Financial instruments not credit-impaired | Loans and advances to customers, including loan commitments and financial guarantees | Personal lending | Mortgages    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 344,676 340,764
Transfers of financial instruments: 10,647 (3,561)
Net new and further lending/repayments 20,746 14,008
Foreign exchange and others 12,254 (6,535)
Balance at 31 Dec 388,323 344,676
Gross carrying amount | – stage 1 | Financial instruments not credit-impaired | Loans and advances to customers | Financial assets at amortised cost, category    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 824,420  
Balance at 31 Dec 893,433 824,420
Gross carrying amount | – stage 1 | Financial instruments not credit-impaired | IFRS 9 | Debt securities | Financial assets measured at fair value through other comprehensive income, category    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 353,002  
Balance at 31 Dec 385,504 353,002
Gross carrying amount | – stage 1 | Financial instruments not credit-impaired | IFRS 9 | Loans and advances to customers | Financial assets at amortised cost, category    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 824,420  
Balance at 31 Dec 893,433 824,420
Gross carrying amount | Lifetime expected credit losses | Financial instruments not credit-impaired | Financial assets at amortised cost, category    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 117,824  
Balance at 31 Dec 104,578 117,824
Gross carrying amount | Lifetime expected credit losses | Financial instruments not credit-impaired | Loans and advances to banks and customers, including loan commitments and financial guarantees    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 115,898  
Transfers of financial instruments: 18,327  
transfers from stage 1 to stage 2 134,309  
transfers from stage 2 to stage 1 (107,223)  
– transfers to stage 3 (10,260)  
– transfers from stage 3 1,501  
Net new and further lending/repayments (35,843)  
Foreign exchange and others 4,507  
Balance at 31 Dec 102,889 115,898
Gross carrying amount | Lifetime expected credit losses | Financial instruments not credit-impaired | Loans and advances to banks and customers, including loan commitments and financial guarantees | Wholesale    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 74,288 102,129
Transfers of financial instruments: 27,793 6,997
Net new and further lending/repayments (27,221) (29,842)
Foreign exchange and others 2,197 (4,996)
Balance at 31 Dec 77,057 74,288
Gross carrying amount | Lifetime expected credit losses | Financial instruments not credit-impaired | Loans and advances to customers, including loan commitments and financial guarantees | Personal lending    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 41,610 50,955
Transfers of financial instruments: (9,466) (345)
Net new and further lending/repayments (8,622) (7,889)
Foreign exchange and others 2,310 (1,111)
Balance at 31 Dec 25,832 41,610
Gross carrying amount | Lifetime expected credit losses | Financial instruments not credit-impaired | Loans and advances to customers, including loan commitments and financial guarantees | Personal lending | Other instruments    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 3,509 5,895
Transfers of financial instruments: 600 (1,570)
Net new and further lending/repayments (1,008) (431)
Foreign exchange and others (27) (385)
Balance at 31 Dec 3,074 3,509
Gross carrying amount | Lifetime expected credit losses | Financial instruments not credit-impaired | Loans and advances to customers, including loan commitments and financial guarantees | Personal lending | Mortgages    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 34,341 38,513
Transfers of financial instruments: (11,388) 2,694
Net new and further lending/repayments (6,856) (6,336)
Foreign exchange and others 2,190 (530)
Balance at 31 Dec 18,287 34,341
Gross carrying amount | Lifetime expected credit losses | Financial instruments not credit-impaired | Loans and advances to customers | Financial assets at amortised cost, category    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 93,248  
Balance at 31 Dec 80,936 93,248
Gross carrying amount | Lifetime expected credit losses | Financial instruments not credit-impaired | IFRS 9 | Debt securities | Financial assets measured at fair value through other comprehensive income, category    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 907  
Balance at 31 Dec 896 907
Gross carrying amount | Lifetime expected credit losses | Financial instruments not credit-impaired | IFRS 9 | Loans and advances to customers | Financial assets at amortised cost, category    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 93,248  
Balance at 31 Dec 80,936 93,248
Gross carrying amount | Lifetime expected credit losses | Financial instruments credit-impaired | Financial assets at amortised cost, category    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 23,976  
Balance at 31 Dec 25,418 23,976
Gross carrying amount | Lifetime expected credit losses | Financial instruments credit-impaired | Loans and advances to banks and customers, including loan commitments and financial guarantees    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 23,823  
Transfers of financial instruments: 9,869  
– transfers to stage 3 12,133  
– transfers from stage 3 (2,264)  
Changes due to modifications not derecognised 0  
Net new and further lending/repayments (6,060)  
Assets written off 3,569  
Credit-related modifications that resulted in derecognition (88)  
Foreign exchange and others 1,259  
Balance at 31 Dec 25,234 23,823
Gross carrying amount | Lifetime expected credit losses | Financial instruments credit-impaired | Loans and advances to banks and customers, including loan commitments and financial guarantees | Wholesale    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 20,177 16,939
Transfers of financial instruments: 7,606 10,609
Net new and further lending/repayments (5,593) (4,450)
Assets written off 1,928 2,925
Credit-related modifications that resulted in derecognition (88) 0
Foreign exchange and others 1,023 4
Balance at 31 Dec 21,197 20,177
Gross carrying amount | Lifetime expected credit losses | Financial instruments credit-impaired | Loans and advances to customers, including loan commitments and financial guarantees | Personal lending    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 3,646 3,860
Transfers of financial instruments: 2,263 2,368
Net new and further lending/repayments (467) (796)
Assets written off 1,641 1,534
Foreign exchange and others 236 (227)
Balance at 31 Dec 4,037 3,646
Gross carrying amount | Lifetime expected credit losses | Financial instruments credit-impaired | Loans and advances to customers, including loan commitments and financial guarantees | Personal lending | Other instruments    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 829 1,152
Transfers of financial instruments: 710 828
Net new and further lending/repayments 87 (272)
Assets written off 731 735
Foreign exchange and others 37 (121)
Balance at 31 Dec 932 829
Gross carrying amount | Lifetime expected credit losses | Financial instruments credit-impaired | Loans and advances to customers, including loan commitments and financial guarantees | Personal lending | Mortgages    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 2,474 2,258
Transfers of financial instruments: 741 867
Net new and further lending/repayments (657) (523)
Assets written off 63 63
Foreign exchange and others 176 (65)
Balance at 31 Dec 2,671 2,474
Gross carrying amount | Lifetime expected credit losses | Financial instruments credit-impaired | Loans and advances to customers | Financial assets at amortised cost, category    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 22,615  
Balance at 31 Dec 24,389 22,615
Gross carrying amount | Lifetime expected credit losses | Financial instruments credit-impaired | IFRS 9 | Debt securities | Financial assets measured at fair value through other comprehensive income, category    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 0  
Balance at 31 Dec 0 0
Gross carrying amount | Lifetime expected credit losses | Financial instruments credit-impaired | IFRS 9 | Loans and advances to customers | Financial assets at amortised cost, category    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 22,615  
Balance at 31 Dec 24,389 22,615
Gross carrying amount | Lifetime expected credit losses | – POCI | Financial assets at amortised cost, category    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 93  
Balance at 31 Dec 337 93
Gross carrying amount | Lifetime expected credit losses | – POCI | Loans and advances to banks and customers, including loan commitments and financial guarantees    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 93  
Net new and further lending/repayments 238  
Foreign exchange and others 6  
Balance at 31 Dec 337 93
Gross carrying amount | Lifetime expected credit losses | – POCI | Loans and advances to banks and customers, including loan commitments and financial guarantees | Wholesale    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 93 85
Net new and further lending/repayments 238 7
Assets written off 0 0
Foreign exchange and others 6 1
Balance at 31 Dec 337 93
Gross carrying amount | Lifetime expected credit losses | – POCI | Loans and advances to customers | Financial assets at amortised cost, category    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 90  
Balance at 31 Dec 333 90
Gross carrying amount | Lifetime expected credit losses | – POCI | IFRS 9 | Debt securities | Financial assets measured at fair value through other comprehensive income, category    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 0  
Balance at 31 Dec 0 0
Gross carrying amount | Lifetime expected credit losses | – POCI | IFRS 9 | Loans and advances to customers | Financial assets at amortised cost, category    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 90  
Balance at 31 Dec 333 90
Allowance for ECL    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan (4,618)  
Balance at 31 Dec (4,593) (4,618)
ECL income statement change for the period (4,900) (4,800)
Allowance for ECL | Assets held for sale    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 0  
Balance at 31 Dec 0 0
Allowance for ECL | Financial assets at amortised cost, category    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan (10,197)  
Balance at 31 Dec (11,194) (10,197)
Allowance for ECL | Financial instruments including loan commitments and financial guarantees    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan (10,105)  
Balance at 31 Dec (11,065) (10,105)
Allowance for ECL | Financial instruments including loan commitments and financial guarantees | Aggregate continuing and discontinued operations    
Increase (decrease) in financial assets [abstract]    
Balance at 31 Dec (11,224)  
Increase (decrease) in ECL 3,850  
Allowance for ECL | Loans and advances to banks and customers, including loan commitments and financial guarantees    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan (10,105)  
Net remeasurement of ECL arising from transfer of stage 2  
Changes due to modifications not derecognised 0  
Net new and further lending/repayments 1,206  
Changes to risk parameters – credit quality (5,362)  
Changes to models used for ECL calculation 197  
Assets written off (3,569)  
Credit-related modifications that resulted in derecognition 9  
Foreign exchange and others (581)  
Balance at 31 Dec (11,065) (10,105)
ECL income statement change for the period 3,957  
Recoveries 320  
Others (248)  
Increase (decrease) in ECL (3,885)  
Allowance for ECL | Loans and advances to banks and customers, including loan commitments and financial guarantees | Wholesale    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan (7,559) (8,603)
Net remeasurement of ECL arising from transfer of stage (22) (24)
Net new and further lending/repayments 825 1,372
Changes to risk parameters – credit quality (3,265) (3,306)
Changes to models used for ECL calculation 247 144
Assets written off (1,928) (2,925)
Credit-related modifications that resulted in derecognition 9 0
Foreign exchange and others (403) (67)
Balance at 31 Dec (8,240) (7,559)
ECL income statement change for the period 2,215 1,814
Recoveries 77 40
Others (267) (126)
Increase (decrease) in ECL (2,405) (1,900)
Allowance for ECL | Loans and advances to banks and customers, including loan commitments and financial guarantees | Argentina business | Wholesale    
Increase (decrease) in financial assets [abstract]    
Foreign exchange and others   300
Allowance for ECL | Loans and advances to banks and customers, including loan commitments and financial guarantees | Assets held for sale    
Increase (decrease) in financial assets [abstract]    
Others 27  
Allowance for ECL | Loans and advances to banks and customers, including loan commitments and financial guarantees | Assets held for sale | Wholesale    
Increase (decrease) in financial assets [abstract]    
Others (11) 23
Allowance for ECL | Loans and advances to banks and customers, including loan commitments and financial guarantees | Assets held for sale | Retained home and other loan portfolio    
Increase (decrease) in financial assets [abstract]    
Others 7  
Allowance for ECL | Loans and advances to banks and customers, including loan commitments and financial guarantees | Assets held for sale | Banking business in Canada | Wholesale    
Increase (decrease) in financial assets [abstract]    
Others   20
Allowance for ECL | Loans and advances to banks and customers, including loan commitments and financial guarantees | Assets held for sale | Banking business in Canada | Personal lending    
Increase (decrease) in financial assets [abstract]    
Others   1
Allowance for ECL | Debt securities | Financial assets measured at fair value through other comprehensive income, category    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan (54)  
Balance at 31 Dec (30) (54)
Increase (decrease) in ECL 18  
Allowance for ECL | Loans and advances to customers, including loan commitments and financial guarantees | Personal lending    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan (2,546) (2,892)
Net remeasurement of ECL arising from transfer of stage 24 8
Net new and further lending/repayments 381 731
Changes to risk parameters – credit quality (2,097) (2,060)
Changes to models used for ECL calculation (50) (100)
Assets written off (1,641) (1,534)
Foreign exchange and others (178) 233
Balance at 31 Dec (2,825) (2,546)
ECL income statement change for the period 1,742 1,421
Recoveries 243 220
Others 19 (32)
Increase (decrease) in ECL (1,480) (1,233)
Allowance for ECL | Loans and advances to customers, including loan commitments and financial guarantees | Personal lending | Other instruments    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan (936) (1,222)
Net remeasurement of ECL arising from transfer of stage (1)  
Net new and further lending/repayments 125 313
Changes to risk parameters – credit quality (871) (908)
Changes to models used for ECL calculation 0 (23)
Assets written off (731) (735)
Foreign exchange and others (71) 121
Balance at 31 Dec (1,023) (936)
ECL income statement change for the period 747 570
Recoveries 114 107
Others 20 (21)
Increase (decrease) in ECL (613) (484)
Allowance for ECL | Loans and advances to customers, including loan commitments and financial guarantees | Personal lending | Mortgages    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan (473) (575)
Net remeasurement of ECL arising from transfer of stage 20 (19)
Net new and further lending/repayments 53 79
Changes to risk parameters – credit quality (108) (61)
Changes to models used for ECL calculation 1 22
Assets written off (63) (63)
Foreign exchange and others (36) 18
Balance at 31 Dec (480) (473)
ECL income statement change for the period 34 (21)
Recoveries 6 7
Others 4 (1)
Increase (decrease) in ECL (24) 27
Allowance for ECL | Loans and advances to customers, including loan commitments and financial guarantees | Assets held for sale | Personal lending    
Increase (decrease) in financial assets [abstract]    
Foreign exchange and others 16 23
Allowance for ECL | Loans and advances to customers, including loan commitments and financial guarantees | Assets held for sale | Personal lending | Mortgages    
Increase (decrease) in financial assets [abstract]    
Foreign exchange and others 2  
Allowance for ECL | Loans and advances to customers, including loan commitments and financial guarantees | Assets held for sale | Retained home and other loan portfolio | Personal lending | Other instruments    
Increase (decrease) in financial assets [abstract]    
Foreign exchange and others 6  
Allowance for ECL | Loans and advances to customers | Assets held for sale | Retained home and other loan portfolio | Personal lending | Other instruments    
Increase (decrease) in financial assets [abstract]    
Foreign exchange and others 11 10
Allowance for ECL | Loans and advances to customers | Assets held for sale | Retained home and other loan portfolio | Personal lending | Mortgages    
Increase (decrease) in financial assets [abstract]    
Foreign exchange and others 1  
Allowance for ECL | Loans and advances to customers | Financial assets at amortised cost, category    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan (9,715)  
Balance at 31 Dec (10,692) (9,715)
Allowance for ECL | IFRS 9 | Assets held for sale    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan (4)  
Balance at 31 Dec (27) (4)
Allowance for ECL | IFRS 9 | Financial assets measured at fair value through other comprehensive income, category    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan (54)  
Balance at 31 Dec (30) (54)
Allowance for ECL | IFRS 9 | Financial instruments including loan commitments and financial guarantees    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan (10,197)  
Balance at 31 Dec (11,194) (10,197)
Increase (decrease) in ECL 3,868  
Allowance for ECL | IFRS 9 | Financial instruments including loan commitments and financial guarantees | Financial assets at amortised cost, category    
Increase (decrease) in financial assets [abstract]    
Increase (decrease) in ECL (29)  
Allowance for ECL | IFRS 9 | Reverse Repurchase Agreement, Non-trading | Financial assets at amortised cost, category    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 0  
Balance at 31 Dec 0 0
Allowance for ECL | IFRS 9 | Performance And Other Guarantee Contracts    
Increase (decrease) in financial assets [abstract]    
Increase (decrease) in ECL 46  
Allowance for ECL | IFRS 9 | Debt securities | Financial assets measured at fair value through other comprehensive income, category    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan (54)  
Balance at 31 Dec (30) (54)
Allowance for ECL | IFRS 9 | Loans and advances to customers | Financial assets at amortised cost, category    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan (9,715)  
Balance at 31 Dec (10,692) (9,715)
Allowance for ECL | Financial instruments credit-impaired | Loans and advances to customers, including loan commitments and financial guarantees | Personal lending | Other instruments    
Increase (decrease) in financial assets [abstract]    
Net remeasurement of ECL arising from transfer of stage   48
Allowance for ECL | – stage 1 | Financial instruments not credit-impaired | Financial assets at amortised cost, category    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan (1,296)  
Balance at 31 Dec (1,438) (1,296)
Allowance for ECL | – stage 1 | Financial instruments not credit-impaired | Loans and advances to banks and customers, including loan commitments and financial guarantees    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan (1,232)  
Transfers of financial instruments: (931)  
transfers from stage 1 to stage 2 368  
transfers from stage 2 to stage 1 (1,233)  
– transfers to stage 3 15  
– transfers from stage 3 (81)  
Net remeasurement of ECL arising from transfer of stage 664  
Net new and further lending/repayments (178)  
Changes to risk parameters – credit quality 390  
Changes to models used for ECL calculation (59)  
Foreign exchange and others (16)  
Balance at 31 Dec (1,362) (1,232)
ECL income statement change for the period (817)  
Allowance for ECL | – stage 1 | Financial instruments not credit-impaired | Loans and advances to banks and customers, including loan commitments and financial guarantees | Wholesale    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan (645) (698)
Transfers of financial instruments: (267) (214)
Net remeasurement of ECL arising from transfer of stage 253 214
Net new and further lending/repayments (171) (151)
Changes to risk parameters – credit quality 181 112
Changes to models used for ECL calculation (30) 39
Foreign exchange and others 7 53
Balance at 31 Dec (672) (645)
ECL income statement change for the period (233) (214)
Allowance for ECL | – stage 1 | Financial instruments not credit-impaired | Loans and advances to customers, including loan commitments and financial guarantees | Personal lending    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan (587) (602)
Transfers of financial instruments: (664) (1,045)
Net remeasurement of ECL arising from transfer of stage 411 745
Net new and further lending/repayments (7) (17)
Changes to risk parameters – credit quality 209 251
Changes to models used for ECL calculation (29) 29
Foreign exchange and others (23) 52
Balance at 31 Dec (690) (587)
ECL income statement change for the period (584) (1,008)
Allowance for ECL | – stage 1 | Financial instruments not credit-impaired | Loans and advances to customers, including loan commitments and financial guarantees | Personal lending | Other instruments    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan (249) (240)
Transfers of financial instruments: (194) (360)
Net remeasurement of ECL arising from transfer of stage 104 302
Net new and further lending/repayments (64) (55)
Changes to risk parameters – credit quality 131 57
Changes to models used for ECL calculation 0 15
Foreign exchange and others (4) 32
Balance at 31 Dec (276) (249)
ECL income statement change for the period (171) (319)
Allowance for ECL | – stage 1 | Financial instruments not credit-impaired | Loans and advances to customers, including loan commitments and financial guarantees | Personal lending | Mortgages    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan (58) (109)
Transfers of financial instruments: (89) (232)
Net remeasurement of ECL arising from transfer of stage 52 163
Net new and further lending/repayments (4) 20
Changes to risk parameters – credit quality 39 115
Changes to models used for ECL calculation 5 (8)
Foreign exchange and others (5) (7)
Balance at 31 Dec (60) (58)
ECL income statement change for the period (92) (290)
Allowance for ECL | – stage 1 | Financial instruments not credit-impaired | Loans and advances to customers | Financial assets at amortised cost, category    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan (1,078)  
Balance at 31 Dec (1,201) (1,078)
Allowance for ECL | – stage 1 | Financial instruments not credit-impaired | IFRS 9 | Debt securities | Financial assets measured at fair value through other comprehensive income, category    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan (31)  
Balance at 31 Dec (28) (31)
Allowance for ECL | – stage 1 | Financial instruments not credit-impaired | IFRS 9 | Loans and advances to customers | Financial assets at amortised cost, category    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan (1,078)  
Balance at 31 Dec (1,201) (1,078)
Allowance for ECL | Lifetime expected credit losses | Financial instruments not credit-impaired | Financial assets at amortised cost, category    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan (2,679)  
Balance at 31 Dec (2,445) (2,679)
Allowance for ECL | Lifetime expected credit losses | Financial instruments not credit-impaired | Loans and advances to banks and customers, including loan commitments and financial guarantees    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan (2,674)  
Transfers of financial instruments: 2,101  
transfers from stage 1 to stage 2 (368)  
transfers from stage 2 to stage 1 1,233  
– transfers to stage 3 1,434  
– transfers from stage 3 (198)  
Net remeasurement of ECL arising from transfer of stage (604)  
Net new and further lending/repayments 614  
Changes to risk parameters – credit quality (1,991)  
Changes to models used for ECL calculation 272  
Foreign exchange and others (152)  
Balance at 31 Dec (2,434) (2,674)
ECL income statement change for the period 1,709  
Allowance for ECL | Lifetime expected credit losses | Financial instruments not credit-impaired | Loans and advances to banks and customers, including loan commitments and financial guarantees | Wholesale    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan (1,516) (1,668)
Transfers of financial instruments: 859 825
Net remeasurement of ECL arising from transfer of stage (226) (226)
Net new and further lending/repayments 304  
Changes to risk parameters – credit quality (826) (899)
Changes to models used for ECL calculation 277 105
Foreign exchange and others (66) 36
Balance at 31 Dec (1,194) (1,516)
ECL income statement change for the period 471 709
Allowance for ECL | Lifetime expected credit losses | Financial instruments not credit-impaired | Loans and advances to customers, including loan commitments and financial guarantees | Personal lending    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan (1,158) (1,434)
Transfers of financial instruments: 1,242 1,477
Net remeasurement of ECL arising from transfer of stage (378) (605)
Net new and further lending/repayments 310 278
Changes to risk parameters – credit quality (1,165) (874)
Changes to models used for ECL calculation (5) (109)
Foreign exchange and others (86) 109
Balance at 31 Dec (1,240) (1,158)
ECL income statement change for the period 1,238 1,310
Allowance for ECL | Lifetime expected credit losses | Financial instruments not credit-impaired | Loans and advances to customers, including loan commitments and financial guarantees | Personal lending | Other instruments    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan (370) (534)
Transfers of financial instruments: 418 528
Net remeasurement of ECL arising from transfer of stage (101) (197)
Net new and further lending/repayments 173 125
Changes to risk parameters – credit quality (482) (325)
Changes to models used for ECL calculation (1) (16)
Foreign exchange and others (32) 49
Balance at 31 Dec (395) (370)
ECL income statement change for the period 411 413
Allowance for ECL | Lifetime expected credit losses | Financial instruments not credit-impaired | Loans and advances to customers, including loan commitments and financial guarantees | Personal lending | Mortgages    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan (130) (202)
Transfers of financial instruments: 82 232
Net remeasurement of ECL arising from transfer of stage (31) (152)
Net new and further lending/repayments 29 26
Changes to risk parameters – credit quality (43) (73)
Changes to models used for ECL calculation (4) 29
Foreign exchange and others (11) 10
Balance at 31 Dec (108) (130)
ECL income statement change for the period 49 170
Allowance for ECL | Lifetime expected credit losses | Financial instruments not credit-impaired | Loans and advances to customers | Financial assets at amortised cost, category    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan (2,546)  
Balance at 31 Dec (2,318) (2,546)
Allowance for ECL | Lifetime expected credit losses | Financial instruments not credit-impaired | IFRS 9 | Debt securities | Financial assets measured at fair value through other comprehensive income, category    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan (23)  
Balance at 31 Dec (2) (23)
Allowance for ECL | Lifetime expected credit losses | Financial instruments not credit-impaired | IFRS 9 | Loans and advances to customers | Financial assets at amortised cost, category    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan (2,546)  
Balance at 31 Dec (2,318) (2,546)
Allowance for ECL | Lifetime expected credit losses | Financial instruments credit-impaired | Financial assets at amortised cost, category    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan (6,171)  
Balance at 31 Dec (7,235) (6,171)
Allowance for ECL | Lifetime expected credit losses | Financial instruments credit-impaired | Loans and advances to banks and customers, including loan commitments and financial guarantees    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan (6,148)  
Transfers of financial instruments: (1,170)  
– transfers to stage 3 (1,449)  
– transfers from stage 3 279  
Net remeasurement of ECL arising from transfer of stage (58)  
Changes due to modifications not derecognised 0  
Net new and further lending/repayments 768  
Changes to risk parameters – credit quality (3,737)  
Changes to models used for ECL calculation (16)  
Assets written off (3,569)  
Credit-related modifications that resulted in derecognition 9  
Foreign exchange and others (410)  
Balance at 31 Dec (7,193) (6,148)
ECL income statement change for the period 3,043  
Allowance for ECL | Lifetime expected credit losses | Financial instruments credit-impaired | Loans and advances to banks and customers, including loan commitments and financial guarantees | Wholesale    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan (5,347) (6,207)
Transfers of financial instruments: (592) (611)
Net remeasurement of ECL arising from transfer of stage (49) (12)
Net new and further lending/repayments 690 1,219
Changes to risk parameters – credit quality (2,596) (2,508)
Assets written off (1,928) (2,925)
Credit-related modifications that resulted in derecognition 9 0
Foreign exchange and others (341) (153)
Balance at 31 Dec (6,298) (5,347)
ECL income statement change for the period 1,955 1,301
Allowance for ECL | Lifetime expected credit losses | Financial instruments credit-impaired | Loans and advances to customers, including loan commitments and financial guarantees | Personal lending    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan (801) (856)
Transfers of financial instruments: (578) (432)
Net remeasurement of ECL arising from transfer of stage (9) (132)
Net new and further lending/repayments 78 470
Changes to risk parameters – credit quality (1,141) (1,437)
Changes to models used for ECL calculation (16) (20)
Assets written off (1,641) (1,534)
Foreign exchange and others (69) 72
Balance at 31 Dec (895) (801)
ECL income statement change for the period 1,088 1,119
Allowance for ECL | Lifetime expected credit losses | Financial instruments credit-impaired | Loans and advances to customers, including loan commitments and financial guarantees | Personal lending | Other instruments    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan (317) (448)
Transfers of financial instruments: (224) (168)
Net remeasurement of ECL arising from transfer of stage (4) (57)
Net new and further lending/repayments 16 243
Changes to risk parameters – credit quality (520) (640)
Changes to models used for ECL calculation 1 (22)
Assets written off (731) (735)
Foreign exchange and others (35) 40
Balance at 31 Dec (352) (317)
ECL income statement change for the period 507 476
Allowance for ECL | Lifetime expected credit losses | Financial instruments credit-impaired | Loans and advances to customers, including loan commitments and financial guarantees | Personal lending | Mortgages    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan (285) (264)
Transfers of financial instruments: 7 0
Net remeasurement of ECL arising from transfer of stage (1) (30)
Net new and further lending/repayments 28 33
Changes to risk parameters – credit quality (104) (103)
Changes to models used for ECL calculation 0 1
Assets written off (63) (63)
Foreign exchange and others (20) 15
Balance at 31 Dec (312) (285)
ECL income statement change for the period 77 99
Allowance for ECL | Lifetime expected credit losses | Financial instruments credit-impaired | Loans and advances to customers | Financial assets at amortised cost, category    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan (6,040)  
Balance at 31 Dec (7,097) (6,040)
Allowance for ECL | Lifetime expected credit losses | Financial instruments credit-impaired | IFRS 9 | Debt securities | Financial assets measured at fair value through other comprehensive income, category    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 0  
Balance at 31 Dec 0 0
Allowance for ECL | Lifetime expected credit losses | Financial instruments credit-impaired | IFRS 9 | Loans and advances to customers | Financial assets at amortised cost, category    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan (6,040)  
Balance at 31 Dec (7,097) (6,040)
Allowance for ECL | Lifetime expected credit losses | – POCI | Financial assets at amortised cost, category    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan (51)  
Balance at 31 Dec (76) (51)
Allowance for ECL | Lifetime expected credit losses | – POCI | Loans and advances to banks and customers, including loan commitments and financial guarantees    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan (51)  
Net new and further lending/repayments 2  
Changes to risk parameters – credit quality (24)  
Foreign exchange and others (3)  
Balance at 31 Dec (76) (51)
ECL income statement change for the period 22  
Allowance for ECL | Lifetime expected credit losses | – POCI | Loans and advances to banks and customers, including loan commitments and financial guarantees | Wholesale    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan (51) (30)
Net new and further lending/repayments 2 (7)
Changes to risk parameters – credit quality (24) (11)
Assets written off 0 0
Foreign exchange and others (3) (3)
Balance at 31 Dec (76) (51)
ECL income statement change for the period 22 18
Allowance for ECL | Lifetime expected credit losses | – POCI | Loans and advances to customers | Financial assets at amortised cost, category    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan (51)  
Balance at 31 Dec (76) (51)
Allowance for ECL | Lifetime expected credit losses | – POCI | IFRS 9 | Debt securities | Financial assets measured at fair value through other comprehensive income, category    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan 0  
Balance at 31 Dec 0 0
Allowance for ECL | Lifetime expected credit losses | – POCI | IFRS 9 | Loans and advances to customers | Financial assets at amortised cost, category    
Increase (decrease) in financial assets [abstract]    
Balance at 1 Jan (51)  
Balance at 31 Dec $ (76) $ (51)