v3.25.4
Report of Directors Financial Review Risk Report - Distribution of financial instruments by credit quality (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets $ 3,117,161 $ 2,923,319
Off-balance sheet commitments 360,260 334,622
Assets held for sale    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 261 3,019
Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 2,486,661 2,350,371
Off-balance sheet commitments 360,529 334,934
Gross carrying amount | Assets held for sale    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 261 3,019
Allowance for ECL    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets (4,593) (4,618)
Off-balance sheet commitments (269) (312)
Allowance for ECL | Assets held for sale    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 0 0
Financial assets at amortised cost, category    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 182,089 153,973
Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 2,706,154 2,507,370
Financial assets at amortised cost, category | Allowance for ECL    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets (11,194) (10,197)
Financial assets designated and otherwise mandatorily measured at fair value through profit or loss    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 3,942 3,357
– loan and other credit-related commitments    
Disclosure of financial assets that are either past due or impaired [line items]    
Off-balance sheet commitments 257,845 242,211
– loan and other credit-related commitments | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Off-balance sheet commitments 257,845 242,211
– loan and other credit-related commitments | Allowance for ECL    
Disclosure of financial assets that are either past due or impaired [line items]    
Off-balance sheet commitments 0 0
Performance And Other Guarantee Contracts    
Disclosure of financial assets that are either past due or impaired [line items]    
Off-balance sheet commitments 102,415 92,411
Performance And Other Guarantee Contracts | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Off-balance sheet commitments 102,684 92,723
Performance And Other Guarantee Contracts | Allowance for ECL    
Disclosure of financial assets that are either past due or impaired [line items]    
Off-balance sheet commitments (269) (312)
Loans And Advances To Customers    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 988,399 930,658
Loans And Advances To Customers | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 999,091 940,373
Loans And Advances To Customers | Financial assets at amortised cost, category | Allowance for ECL    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets (10,692) (9,715)
Loans And Advances To Banks    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 108,462 102,039
Loans And Advances To Banks | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 108,469 102,052
Loans And Advances To Banks | Financial assets at amortised cost, category | Allowance for ECL    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets (7) (13)
Reverse Repurchase Agreement, Non-trading    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 298,392 252,549
Debt securities | Financial assets at amortised cost, category    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 158,644 131,825
Debt securities | Debt instruments measured at fair value through other comprehensive income | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 383,568 346,124
Debt securities | Debt instruments measured at fair value through other comprehensive income | Allowance for ECL    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets (30) (54)
Debt securities | Financial assets designated and otherwise mandatorily measured at fair value through profit or loss    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 2,042 1,674
Trading securities    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 189,841 159,648
Trading securities | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 189,841 159,648
Trading securities | Allowance for ECL    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 0 0
Other | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 890,326 828,580
Other | Financial assets at amortised cost, category | Allowance for ECL    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets (129) (92)
Other | Financial assets designated and otherwise mandatorily measured at fair value through profit or loss    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 79,930 69,776
Other | Financial assets designated and otherwise mandatorily measured at fair value through profit or loss | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 79,930 69,776
Other | Financial assets designated and otherwise mandatorily measured at fair value through profit or loss | Allowance for ECL    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 0 0
Derivatives    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 237,740 268,637
Derivatives | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 237,740 268,637
Derivatives | Allowance for ECL    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 0 0
– personal | Loans And Advances To Customers | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 474,528 447,225
– personal | Loans And Advances To Customers | Financial assets at amortised cost, category | Allowance for ECL    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets (2,797) (2,524)
– corporate and commercial | Loans And Advances To Customers | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 424,505 410,684
– corporate and commercial | Loans And Advances To Customers | Financial assets at amortised cost, category | Allowance for ECL    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets (7,526) (6,755)
– non-bank financial institutions | Loans And Advances To Customers | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 100,058 82,464
– non-bank financial institutions | Loans And Advances To Customers | Financial assets at amortised cost, category | Allowance for ECL    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets (369) (436)
Strong | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Off-balance sheet commitments 153,426 136,892
Strong | Gross carrying amount | Assets held for sale    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 10 3,019
Strong | – loan and other credit-related commitments | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Off-balance sheet commitments 105,985 96,952
Strong | Performance And Other Guarantee Contracts | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Off-balance sheet commitments 47,441 39,940
Strong | Trading securities | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 143,943 119,546
Strong | Other | Financial assets designated and otherwise mandatorily measured at fair value through profit or loss | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 61,509 53,282
Strong | Derivatives | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 194,320 224,870
Good | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Off-balance sheet commitments 114,621 109,296
Good | Gross carrying amount | Assets held for sale    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 103 0
Good | – loan and other credit-related commitments | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Off-balance sheet commitments 81,431 76,340
Good | Performance And Other Guarantee Contracts | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Off-balance sheet commitments 33,190 32,956
Good | Trading securities | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 22,187 21,951
Good | Other | Financial assets designated and otherwise mandatorily measured at fair value through profit or loss | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 13,037 11,862
Good | Derivatives | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 33,752 34,124
Satisfactory | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Off-balance sheet commitments 87,332 82,958
Satisfactory | Gross carrying amount | Assets held for sale    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 0 0
Satisfactory | – loan and other credit-related commitments | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Off-balance sheet commitments 67,475 65,619
Satisfactory | Performance And Other Guarantee Contracts | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Off-balance sheet commitments 19,857 17,339
Satisfactory | Trading securities | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 22,943 15,804
Satisfactory | Other | Financial assets designated and otherwise mandatorily measured at fair value through profit or loss | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 5,014 4,390
Satisfactory | Derivatives | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 9,382 9,373
Sub-standard | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Off-balance sheet commitments 4,053 4,518
Sub-standard | Gross carrying amount | Assets held for sale    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 0 0
Sub-standard | – loan and other credit-related commitments | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Off-balance sheet commitments 2,702 2,847
Sub-standard | Performance And Other Guarantee Contracts | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Off-balance sheet commitments 1,351 1,671
Sub-standard | Trading securities | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 603 2,300
Sub-standard | Other | Financial assets designated and otherwise mandatorily measured at fair value through profit or loss | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 351 231
Sub-standard | Derivatives | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 283 258
Credit impaired | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Off-balance sheet commitments 1,097 1,270
Financial assets excluding equity securities    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 2,881,200 2,716,120
Financial assets excluding equity securities | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 2,892,058 2,725,994
Financial assets excluding equity securities | Allowance for ECL    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets (10,858) (9,874)
Financial assets excluding equity securities | Strong | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 2,165,440 2,047,487
Financial assets excluding equity securities | Good | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 387,915 360,420
Financial assets excluding equity securities | Satisfactory | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 290,228 268,451
Financial assets excluding equity securities | Sub-standard | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets $ 23,426 $ 26,706
Portfolio Concentration Risk | Financial assets excluding equity securities | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Percentage of total credit quality (%) 100.00% 100.00%
Portfolio Concentration Risk | Financial assets excluding equity securities | Strong | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Percentage of total credit quality (%) 74.90% 75.10%
Portfolio Concentration Risk | Financial assets excluding equity securities | Good | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Percentage of total credit quality (%) 13.40% 13.20%
Portfolio Concentration Risk | Financial assets excluding equity securities | Satisfactory | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Percentage of total credit quality (%) 10.00% 9.90%
Portfolio Concentration Risk | Financial assets excluding equity securities | Sub-standard | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Percentage of total credit quality (%) 0.80% 1.00%
Credit impaired | Credit impaired | Gross carrying amount | Assets held for sale    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets $ 148 $ 0
Credit impaired | Credit impaired | – loan and other credit-related commitments | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Off-balance sheet commitments 252 453
Credit impaired | Credit impaired | Performance And Other Guarantee Contracts | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Off-balance sheet commitments 845 817
Credit impaired | Credit impaired | Trading securities | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 165 47
Credit impaired | Credit impaired | Other | Financial assets designated and otherwise mandatorily measured at fair value through profit or loss | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 19 11
Credit impaired | Credit impaired | Derivatives | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 3 12
Credit impaired | Financial assets excluding equity securities | Credit impaired | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets $ 25,049 $ 22,930
Credit impaired | Portfolio Concentration Risk | Financial assets excluding equity securities | Credit impaired | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Percentage of total credit quality (%) 0.90% 0.80%
IFRS 9    
Disclosure of financial assets that are either past due or impaired [line items]    
Off-balance sheet commitments $ 707,902 $ 635,988
IFRS 9 | Assets held for sale    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 4,088 3,269
IFRS 9 | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Off-balance sheet commitments 708,268 636,365
IFRS 9 | Gross carrying amount | Assets held for sale    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 4,115 3,273
IFRS 9 | Allowance for ECL    
Disclosure of financial assets that are either past due or impaired [line items]    
Off-balance sheet commitments (366) (377)
IFRS 9 | Allowance for ECL | Assets held for sale    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets (27) (4)
IFRS 9 | Debt instruments measured at fair value through other comprehensive income    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 386,370 353,855
IFRS 9 | Debt instruments measured at fair value through other comprehensive income | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 386,400 353,909
IFRS 9 | Debt instruments measured at fair value through other comprehensive income | Allowance for ECL    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets (30) (54)
IFRS 9 | – loan and other credit-related commitments    
Disclosure of financial assets that are either past due or impaired [line items]    
Off-balance sheet commitments 690,477 619,019
IFRS 9 | – loan and other credit-related commitments | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Off-balance sheet commitments 690,792 619,367
IFRS 9 | – loan and other credit-related commitments | Allowance for ECL    
Disclosure of financial assets that are either past due or impaired [line items]    
Off-balance sheet commitments (315) (348)
IFRS 9 | Financial guarantees    
Disclosure of financial assets that are either past due or impaired [line items]    
Off-balance sheet commitments 17,425 16,969
IFRS 9 | Financial guarantees | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Off-balance sheet commitments 17,476 16,998
IFRS 9 | Financial guarantees | Allowance for ECL    
Disclosure of financial assets that are either past due or impaired [line items]    
Off-balance sheet commitments (51) (29)
IFRS 9 | Loans And Advances To Customers | Financial assets at amortised cost, category    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 988,399 930,658
IFRS 9 | Loans And Advances To Customers | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 999,091 940,373
IFRS 9 | Loans And Advances To Customers | Financial assets at amortised cost, category | Allowance for ECL    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets (10,692) (9,715)
IFRS 9 | Loans And Advances To Banks | Financial assets at amortised cost, category    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 108,462 102,039
IFRS 9 | Loans And Advances To Banks | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 108,469 102,052
IFRS 9 | Loans And Advances To Banks | Financial assets at amortised cost, category | Allowance for ECL    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets (7) (13)
IFRS 9 | Cash And Balances At Central Banks | Financial assets at amortised cost, category    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 242,859 267,674
IFRS 9 | Cash And Balances At Central Banks | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 242,859 267,674
IFRS 9 | Cash And Balances At Central Banks | Financial assets at amortised cost, category | Allowance for ECL    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 0 0
IFRS 9 | Hong Kong Government certificates of indebtedness | Financial assets at amortised cost, category    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 44,063 42,293
IFRS 9 | Hong Kong Government certificates of indebtedness | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 44,063 42,293
IFRS 9 | Hong Kong Government certificates of indebtedness | Financial assets at amortised cost, category | Allowance for ECL    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 0 0
IFRS 9 | Reverse Repurchase Agreement, Non-trading | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 75,372  
IFRS 9 | Reverse Repurchase Agreement, Non-trading | Financial assets at amortised cost, category    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 298,392 252,549
IFRS 9 | Reverse Repurchase Agreement, Non-trading | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 298,392 252,549
IFRS 9 | Reverse Repurchase Agreement, Non-trading | Financial assets at amortised cost, category | Allowance for ECL    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 0 0
IFRS 9 | Financial Investments Excluding Equity Securities | Financial assets at amortised cost, category    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 182,089 153,973
IFRS 9 | Financial Investments Excluding Equity Securities | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 182,101 153,982
IFRS 9 | Financial Investments Excluding Equity Securities | Financial assets at amortised cost, category | Allowance for ECL    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets (12) (9)
IFRS 9 | Other assets    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 118,706 108,730
IFRS 9 | Other assets | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 118,796 108,809
IFRS 9 | Other assets | Allowance for ECL    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets (90) (79)
IFRS 9 | Endorsements And Acceptances    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 8,695 8,093
IFRS 9 | Endorsements And Acceptances | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 8,706 8,107
IFRS 9 | Endorsements And Acceptances | Allowance for ECL    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets (11) (14)
IFRS 9 | Accrued Income And Other Assets    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 110,011 100,637
IFRS 9 | Accrued Income And Other Assets | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 110,090 100,702
IFRS 9 | Accrued Income And Other Assets | Allowance for ECL    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets (79) (65)
IFRS 9 | Debt securities | Debt instruments measured at fair value through other comprehensive income    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 386,370 353,855
IFRS 9 | Debt securities | Debt instruments measured at fair value through other comprehensive income | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 386,400 353,909
IFRS 9 | Debt securities | Debt instruments measured at fair value through other comprehensive income | Allowance for ECL    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets (30) (54)
IFRS 9 | Other | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 890,326  
IFRS 9 | Other | Allowance for ECL    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets (129)  
IFRS 9 | Other | Financial assets at amortised cost, category    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 890,197 828,488
IFRS 9 | Other | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 890,326 828,580
IFRS 9 | Other | Financial assets at amortised cost, category | Allowance for ECL    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets (129) (92)
IFRS 9 | – personal | Loans And Advances To Customers | Financial assets at amortised cost, category    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 471,731 444,701
IFRS 9 | – personal | Loans And Advances To Customers | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 474,528 447,225
IFRS 9 | – personal | Loans And Advances To Customers | Financial assets at amortised cost, category | Allowance for ECL    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets (2,797) (2,524)
IFRS 9 | – corporate and commercial | Loans And Advances To Customers | Financial assets at amortised cost, category    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 416,979 403,929
IFRS 9 | – corporate and commercial | Loans And Advances To Customers | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 424,505 410,684
IFRS 9 | – corporate and commercial | Loans And Advances To Customers | Financial assets at amortised cost, category | Allowance for ECL    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets (7,526) (6,755)
IFRS 9 | – non-bank financial institutions | Loans And Advances To Customers | Financial assets at amortised cost, category    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 99,689 82,028
IFRS 9 | – non-bank financial institutions | Loans And Advances To Customers | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 100,058 82,464
IFRS 9 | – non-bank financial institutions | Loans And Advances To Customers | Financial assets at amortised cost, category | Allowance for ECL    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets (369) (436)
IFRS 9 | Strong | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Off-balance sheet commitments 449,176 407,485
IFRS 9 | Strong | Gross carrying amount | Assets held for sale    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 449 2,425
IFRS 9 | Strong | Debt instruments measured at fair value through other comprehensive income | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 375,950 336,313
IFRS 9 | Strong | – loan and other credit-related commitments | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Off-balance sheet commitments 441,740 400,120
IFRS 9 | Strong | Financial guarantees | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Off-balance sheet commitments 7,436 7,365
IFRS 9 | Strong | Loans And Advances To Customers | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 545,487 515,266
IFRS 9 | Strong | Loans And Advances To Banks | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 97,524 92,621
IFRS 9 | Strong | Cash And Balances At Central Banks | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 242,187 266,713
IFRS 9 | Strong | Hong Kong Government certificates of indebtedness | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 44,063 42,293
IFRS 9 | Strong | Reverse Repurchase Agreement, Non-trading | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 193,352 155,831
IFRS 9 | Strong | Financial Investments Excluding Equity Securities | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 171,057 146,970
IFRS 9 | Strong | Other assets | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 95,589 88,338
IFRS 9 | Strong | Endorsements And Acceptances | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 1,504 2,101
IFRS 9 | Strong | Accrued Income And Other Assets | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 94,085 86,237
IFRS 9 | Strong | Debt securities | Debt instruments measured at fair value through other comprehensive income | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 375,950 336,313
IFRS 9 | Strong | Other | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 746,697 702,570
IFRS 9 | Strong | – personal | Loans And Advances To Customers | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 380,030 360,317
IFRS 9 | Strong | – corporate and commercial | Loans And Advances To Customers | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 113,787 114,504
IFRS 9 | Strong | – non-bank financial institutions | Loans And Advances To Customers | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 51,670 40,445
IFRS 9 | Good | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Off-balance sheet commitments 151,068 135,659
IFRS 9 | Good | Gross carrying amount | Assets held for sale    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 2,751 458
IFRS 9 | Good | Debt instruments measured at fair value through other comprehensive income | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 2,592 9,448
IFRS 9 | Good | – loan and other credit-related commitments | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Off-balance sheet commitments 146,923 131,396
IFRS 9 | Good | Financial guarantees | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Off-balance sheet commitments 4,145 4,263
IFRS 9 | Good | Loans And Advances To Customers | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 215,781 193,080
IFRS 9 | Good | Loans And Advances To Banks | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 6,222 4,255
IFRS 9 | Good | Cash And Balances At Central Banks | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 590 949
IFRS 9 | Good | Hong Kong Government certificates of indebtedness | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 0 0
IFRS 9 | Good | Reverse Repurchase Agreement, Non-trading | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 78,296 70,877
IFRS 9 | Good | Financial Investments Excluding Equity Securities | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 654 3,681
IFRS 9 | Good | Other assets | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 11,950 9,735
IFRS 9 | Good | Endorsements And Acceptances | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 3,331 2,663
IFRS 9 | Good | Accrued Income And Other Assets | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 8,619 7,072
IFRS 9 | Good | Debt securities | Debt instruments measured at fair value through other comprehensive income | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 2,592 9,448
IFRS 9 | Good | Other | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 94,241 85,700
IFRS 9 | Good | – personal | Loans And Advances To Customers | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 57,064 53,595
IFRS 9 | Good | – corporate and commercial | Loans And Advances To Customers | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 132,972 118,785
IFRS 9 | Good | – non-bank financial institutions | Loans And Advances To Customers | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 25,745 20,700
IFRS 9 | Satisfactory | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Off-balance sheet commitments 96,544 81,619
IFRS 9 | Satisfactory | Gross carrying amount | Assets held for sale    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 864 367
IFRS 9 | Satisfactory | Debt instruments measured at fair value through other comprehensive income | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 7,572 7,768
IFRS 9 | Satisfactory | – loan and other credit-related commitments | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Off-balance sheet commitments 91,400 77,220
IFRS 9 | Satisfactory | Financial guarantees | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Off-balance sheet commitments 5,144 4,399
IFRS 9 | Satisfactory | Loans And Advances To Customers | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 191,839 186,416
IFRS 9 | Satisfactory | Loans And Advances To Banks | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 4,613 5,040
IFRS 9 | Satisfactory | Cash And Balances At Central Banks | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 82 12
IFRS 9 | Satisfactory | Hong Kong Government certificates of indebtedness | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 0 0
IFRS 9 | Satisfactory | Reverse Repurchase Agreement, Non-trading | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 26,740 25,799
IFRS 9 | Satisfactory | Financial Investments Excluding Equity Securities | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 10,390 3,331
IFRS 9 | Satisfactory | Other assets | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 10,789 10,151
IFRS 9 | Satisfactory | Endorsements And Acceptances | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 3,624 3,090
IFRS 9 | Satisfactory | Accrued Income And Other Assets | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 7,165 7,061
IFRS 9 | Satisfactory | Debt securities | Debt instruments measured at fair value through other comprehensive income | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 7,572 7,768
IFRS 9 | Satisfactory | Other | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 48,865 39,660
IFRS 9 | Satisfactory | – personal | Loans And Advances To Customers | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 30,688 27,774
IFRS 9 | Satisfactory | – corporate and commercial | Loans And Advances To Customers | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 139,599 138,705
IFRS 9 | Satisfactory | – non-bank financial institutions | Loans And Advances To Customers | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 21,552 19,937
IFRS 9 | Sub-standard | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Off-balance sheet commitments 10,632 10,393
IFRS 9 | Sub-standard | Gross carrying amount | Assets held for sale    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 0 1
IFRS 9 | Sub-standard | Debt instruments measured at fair value through other comprehensive income | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 286 380
IFRS 9 | Sub-standard | – loan and other credit-related commitments | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Off-balance sheet commitments 10,073 9,670
IFRS 9 | Sub-standard | Financial guarantees | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Off-balance sheet commitments 559 723
IFRS 9 | Sub-standard | Loans And Advances To Customers | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 21,455 22,906
IFRS 9 | Sub-standard | Loans And Advances To Banks | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 109 134
IFRS 9 | Sub-standard | Cash And Balances At Central Banks | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 0 0
IFRS 9 | Sub-standard | Hong Kong Government certificates of indebtedness | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 0 0
IFRS 9 | Sub-standard | Reverse Repurchase Agreement, Non-trading | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 4 42
IFRS 9 | Sub-standard | Financial Investments Excluding Equity Securities | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 0 0
IFRS 9 | Sub-standard | Other assets | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 335 454
IFRS 9 | Sub-standard | Endorsements And Acceptances | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 236 243
IFRS 9 | Sub-standard | Accrued Income And Other Assets | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 99 211
IFRS 9 | Sub-standard | Debt securities | Debt instruments measured at fair value through other comprehensive income | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 286 380
IFRS 9 | Sub-standard | Other | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 339 497
IFRS 9 | Sub-standard | – personal | Loans And Advances To Customers | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 2,801 1,979
IFRS 9 | Sub-standard | – corporate and commercial | Loans And Advances To Customers | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 18,041 20,224
IFRS 9 | Sub-standard | – non-bank financial institutions | Loans And Advances To Customers | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 613 703
IFRS 9 | Credit impaired | Debt instruments measured at fair value through other comprehensive income | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 0 0
IFRS 9 | Credit impaired | – loan and other credit-related commitments | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Off-balance sheet commitments 656 961
IFRS 9 | Credit impaired | Loans And Advances To Customers | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 24,529 22,705
IFRS 9 | Credit impaired | Loans And Advances To Banks | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 1 2
IFRS 9 | Credit impaired | Other | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 184 153
IFRS 9 | Credit impaired | Credit impaired | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Off-balance sheet commitments 848 1,209
IFRS 9 | Credit impaired | Credit impaired | Gross carrying amount | Assets held for sale    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 51 22
IFRS 9 | Credit impaired | Credit impaired | – loan and other credit-related commitments | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Off-balance sheet commitments 656 961
IFRS 9 | Credit impaired | Credit impaired | Financial guarantees | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Off-balance sheet commitments 192 248
IFRS 9 | Credit impaired | Credit impaired | Loans And Advances To Customers | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 24,529 22,705
IFRS 9 | Credit impaired | Credit impaired | Loans And Advances To Banks | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 1 2
IFRS 9 | Credit impaired | Credit impaired | Cash And Balances At Central Banks | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 0 0
IFRS 9 | Credit impaired | Credit impaired | Hong Kong Government certificates of indebtedness | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 0 0
IFRS 9 | Credit impaired | Credit impaired | Reverse Repurchase Agreement, Non-trading | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 0 0
IFRS 9 | Credit impaired | Credit impaired | Financial Investments Excluding Equity Securities | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 0 0
IFRS 9 | Credit impaired | Credit impaired | Other assets | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 133 131
IFRS 9 | Credit impaired | Credit impaired | Endorsements And Acceptances | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 11 10
IFRS 9 | Credit impaired | Credit impaired | Accrued Income And Other Assets | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 122 121
IFRS 9 | Credit impaired | Credit impaired | Debt securities | Debt instruments measured at fair value through other comprehensive income | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 0 0
IFRS 9 | Credit impaired | Credit impaired | – personal | Loans And Advances To Customers | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 3,945 3,560
IFRS 9 | Credit impaired | Credit impaired | – corporate and commercial | Loans And Advances To Customers | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets 20,106 18,466
IFRS 9 | Credit impaired | Credit impaired | – non-bank financial institutions | Loans And Advances To Customers | Financial assets at amortised cost, category | Gross carrying amount    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets $ 478 $ 679