v3.25.4
Report of Directors Financial Review Risk Report - Wholesale lending: commercial real estate loans and advances including loan commitments by level of collateral for key countries/territories (by stage) (Details) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 2,694,960 $ 2,497,173
IFRS 9 | Gross carrying amount    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments 2,706,154 2,507,370
IFRS 9 | Allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ (11,194) $ (10,197)
Wholesale | Commercial real estate loans and advances including loan commitments    
Disclosure of financial assets [line items]    
Expected credit loss rate 17.60% 16.00%
Wholesale | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Collateral value $ 3,370 $ 2,311
Wholesale | Other corporate, commerical, and non-bank financial institutions loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Collateral value 28,904 26,482
Wholesale | UK | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Collateral value $ 1,562 $ 741
Wholesale | Hong Kong | Commercial real estate loans and advances including loan commitments    
Disclosure of financial assets [line items]    
Expected credit loss rate 37.00% 31.20%
Wholesale | Hong Kong | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Collateral value $ 897 $ 560
Wholesale | Not collateralised | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 41,987 $ 42,581
Expected credit loss rate 2.30% 3.00%
Wholesale | Not collateralised | Other corporate, commerical, and non-bank financial institutions loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 864,644 $ 782,747
Expected credit loss rate 0.40% 0.50%
Wholesale | Not collateralised | UK | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 9,078 $ 6,504
Expected credit loss rate 0.70% 1.90%
Wholesale | Not collateralised | Hong Kong | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 18,145 $ 20,096
Expected credit loss rate 4.40% 5.00%
Wholesale | Fully collateralised by LTV ratio | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 50,402 $ 54,253
Expected credit loss rate 2.40% 1.20%
Wholesale | Fully collateralised by LTV ratio | Other corporate, commerical, and non-bank financial institutions loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 105,388 $ 102,895
Expected credit loss rate 0.80% 0.60%
Wholesale | Fully collateralised by LTV ratio | UK | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 14,441 $ 12,638
Expected credit loss rate 1.00% 0.60%
Wholesale | Fully collateralised by LTV ratio | Hong Kong | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 24,024 $ 27,287
Expected credit loss rate 2.90% 1.20%
Wholesale | Partially collateralised | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 5,158 $ 3,696
Expected credit loss rate 8.70% 5.80%
Wholesale | Partially collateralised | Other corporate, commerical, and non-bank financial institutions loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 62,447 $ 59,722
Expected credit loss rate 1.70% 1.50%
Wholesale | Partially collateralised | UK | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 2,354 $ 1,233
Expected credit loss rate 1.90% 5.30%
Wholesale | Partially collateralised | Hong Kong | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 1,349 $ 827
Expected credit loss rate 29.00% 12.90%
Wholesale | – less than 50% | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 26,673 $ 28,089
Expected credit loss rate 1.70% 0.90%
Wholesale | – less than 50% | Other corporate, commerical, and non-bank financial institutions loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 44,404 $ 45,495
Expected credit loss rate 0.60% 0.50%
Wholesale | – less than 50% | UK | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 5,072 $ 3,824
Expected credit loss rate 0.60% 0.80%
Wholesale | – less than 50% | Hong Kong | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 15,997 $ 18,626
Expected credit loss rate 1.80% 0.70%
Wholesale | – 51% to 75% | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 16,693 $ 16,923
Expected credit loss rate 2.90% 1.30%
Wholesale | – 51% to 75% | Other corporate, commerical, and non-bank financial institutions loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 27,530 $ 25,611
Expected credit loss rate 1.30% 1.00%
Wholesale | – 51% to 75% | UK | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 6,895 $ 5,964
Expected credit loss rate 1.40% 0.60%
Wholesale | – 51% to 75% | Hong Kong | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 6,127 $ 5,836
Expected credit loss rate 3.90% 1.80%
Wholesale | – 76% to 90% | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 4,202 $ 5,598
Expected credit loss rate 3.90% 2.10%
Wholesale | – 76% to 90% | Other corporate, commerical, and non-bank financial institutions loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 10,248 $ 11,043
Expected credit loss rate 1.20% 0.60%
Wholesale | – 76% to 90% | UK | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 1,926 $ 1,929
Expected credit loss rate 0.70% 0.30%
Wholesale | – 76% to 90% | Hong Kong | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 1,058 $ 2,040
Expected credit loss rate 6.00% 4.40%
Wholesale | – 91% to 100% | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 2,834 $ 3,643
Expected credit loss rate 4.60% 1.80%
Wholesale | – 91% to 100% | Other corporate, commerical, and non-bank financial institutions loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 23,206 $ 20,746
Expected credit loss rate 0.30% 0.20%
Wholesale | – 91% to 100% | UK | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 548 $ 921
Expected credit loss rate 0.40% 0.30%
Wholesale | – 91% to 100% | Hong Kong | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 842 $ 785
Expected credit loss rate 13.40% 0.60%
Wholesale | – stage 1 | Financial instruments not credit-impaired | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Collateral value $ 2,317 $ 1,255
Wholesale | – stage 1 | Financial instruments not credit-impaired | Other corporate, commerical, and non-bank financial institutions loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Collateral value 24,763 22,800
Wholesale | – stage 1 | Financial instruments not credit-impaired | UK | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Collateral value 1,381 296
Wholesale | – stage 1 | Financial instruments not credit-impaired | Hong Kong | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Collateral value 149 119
Wholesale | – stage 1 | Financial instruments not credit-impaired | Not collateralised | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 36,879 $ 36,168
Expected credit loss rate 0.10% 0.10%
Wholesale | – stage 1 | Financial instruments not credit-impaired | Not collateralised | Other corporate, commerical, and non-bank financial institutions loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 797,344 $ 713,028
Expected credit loss rate 0.10% 0.10%
Wholesale | – stage 1 | Financial instruments not credit-impaired | Not collateralised | UK | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 8,633 $ 4,487
Expected credit loss rate 0.20% 0.40%
Wholesale | – stage 1 | Financial instruments not credit-impaired | Not collateralised | Hong Kong | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 14,360 $ 16,380
Expected credit loss rate 0.00% 0.00%
Wholesale | – stage 1 | Financial instruments not credit-impaired | Fully collateralised by LTV ratio | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 26,814 $ 37,090
Expected credit loss rate 0.10% 0.10%
Wholesale | – stage 1 | Financial instruments not credit-impaired | Fully collateralised by LTV ratio | Other corporate, commerical, and non-bank financial institutions loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 88,647 $ 87,488
Expected credit loss rate 0.10% 0.10%
Wholesale | – stage 1 | Financial instruments not credit-impaired | Fully collateralised by LTV ratio | UK | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 12,426 $ 9,139
Expected credit loss rate 0.20% 0.20%
Wholesale | – stage 1 | Financial instruments not credit-impaired | Fully collateralised by LTV ratio | Hong Kong | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 5,588 $ 17,115
Expected credit loss rate 0.10% 0.10%
Wholesale | – stage 1 | Financial instruments not credit-impaired | Partially collateralised | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 3,635 $ 2,119
Expected credit loss rate 0.10% 0.20%
Wholesale | – stage 1 | Financial instruments not credit-impaired | Partially collateralised | Other corporate, commerical, and non-bank financial institutions loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 53,980 $ 51,536
Expected credit loss rate 0.10% 0.10%
Wholesale | – stage 1 | Financial instruments not credit-impaired | Partially collateralised | UK | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 2,111 $ 503
Expected credit loss rate 0.10% 0.20%
Wholesale | – stage 1 | Financial instruments not credit-impaired | Partially collateralised | Hong Kong | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 198 $ 185
Expected credit loss rate 0.00% 0.00%
Wholesale | – stage 1 | Financial instruments not credit-impaired | – less than 50% | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 13,415 $ 20,522
Expected credit loss rate 0.10% 0.10%
Wholesale | – stage 1 | Financial instruments not credit-impaired | – less than 50% | Other corporate, commerical, and non-bank financial institutions loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 37,949 $ 39,432
Expected credit loss rate 0.10% 0.10%
Wholesale | – stage 1 | Financial instruments not credit-impaired | – less than 50% | UK | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 4,606 $ 2,903
Expected credit loss rate 0.20% 0.20%
Wholesale | – stage 1 | Financial instruments not credit-impaired | – less than 50% | Hong Kong | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 4,008 $ 12,935
Expected credit loss rate 0.10% 0.10%
Wholesale | – stage 1 | Financial instruments not credit-impaired | – 51% to 75% | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 9,168 $ 11,392
Expected credit loss rate 0.20% 0.10%
Wholesale | – stage 1 | Financial instruments not credit-impaired | – 51% to 75% | Other corporate, commerical, and non-bank financial institutions loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 21,397 $ 20,169
Expected credit loss rate 0.10% 0.10%
Wholesale | – stage 1 | Financial instruments not credit-impaired | – 51% to 75% | UK | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 5,772 $ 4,202
Expected credit loss rate 0.20% 0.20%
Wholesale | – stage 1 | Financial instruments not credit-impaired | – 51% to 75% | Hong Kong | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 1,167 $ 3,534
Expected credit loss rate 0.20% 0.10%
Wholesale | – stage 1 | Financial instruments not credit-impaired | – 76% to 90% | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 2,232 $ 2,554
Expected credit loss rate 0.10% 0.10%
Wholesale | – stage 1 | Financial instruments not credit-impaired | – 76% to 90% | Other corporate, commerical, and non-bank financial institutions loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 8,253 $ 9,016
Expected credit loss rate 0.10% 0.10%
Wholesale | – stage 1 | Financial instruments not credit-impaired | – 76% to 90% | UK | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 1,511 $ 1,173
Expected credit loss rate 0.10% 0.10%
Wholesale | – stage 1 | Financial instruments not credit-impaired | – 76% to 90% | Hong Kong | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 59 $ 336
Expected credit loss rate 0.00% 0.10%
Wholesale | – stage 1 | Financial instruments not credit-impaired | – 91% to 100% | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 1,999 $ 2,622
Expected credit loss rate 0.10% 0.20%
Wholesale | – stage 1 | Financial instruments not credit-impaired | – 91% to 100% | Other corporate, commerical, and non-bank financial institutions loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 21,048 $ 18,871
Expected credit loss rate 0.00% 0.00%
Wholesale | – stage 1 | Financial instruments not credit-impaired | – 91% to 100% | UK | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 537 $ 861
Expected credit loss rate 0.20% 0.10%
Wholesale | – stage 1 | Financial instruments not credit-impaired | – 91% to 100% | Hong Kong | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 354 $ 310
Expected credit loss rate 0.00% 0.00%
Wholesale | Lifetime expected credit losses | Financial instruments not credit-impaired | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Collateral value $ 240 $ 457
Wholesale | Lifetime expected credit losses | Financial instruments not credit-impaired | Other corporate, commerical, and non-bank financial institutions loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Collateral value 2,942 2,519
Wholesale | Lifetime expected credit losses | Financial instruments not credit-impaired | UK | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Collateral value 109 350
Wholesale | Lifetime expected credit losses | Financial instruments not credit-impaired | Hong Kong | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Collateral value 11 41
Wholesale | Lifetime expected credit losses | Financial instruments not credit-impaired | Not collateralised | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 3,792 $ 4,709
Expected credit loss rate 2.70% 9.00%
Wholesale | Lifetime expected credit losses | Financial instruments not credit-impaired | Not collateralised | Other corporate, commerical, and non-bank financial institutions loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 60,899 $ 62,844
Expected credit loss rate 0.90% 0.90%
Wholesale | Lifetime expected credit losses | Financial instruments not credit-impaired | Not collateralised | UK | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 389 $ 1,890
Expected credit loss rate 8.20% 3.80%
Wholesale | Lifetime expected credit losses | Financial instruments not credit-impaired | Not collateralised | Hong Kong | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 2,691 $ 2,312
Expected credit loss rate 2.40% 14.30%
Wholesale | Lifetime expected credit losses | Financial instruments not credit-impaired | Fully collateralised by LTV ratio | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 16,633 $ 11,909
Expected credit loss rate 1.70% 1.70%
Wholesale | Lifetime expected credit losses | Financial instruments not credit-impaired | Fully collateralised by LTV ratio | Other corporate, commerical, and non-bank financial institutions loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 13,101 $ 11,992
Expected credit loss rate 1.60% 2.00%
Wholesale | Lifetime expected credit losses | Financial instruments not credit-impaired | Fully collateralised by LTV ratio | UK | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 1,661 $ 3,194
Expected credit loss rate 2.60% 1.10%
Wholesale | Lifetime expected credit losses | Financial instruments not credit-impaired | Fully collateralised by LTV ratio | Hong Kong | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 12,969 $ 6,045
Expected credit loss rate 0.80% 1.40%
Wholesale | Lifetime expected credit losses | Financial instruments not credit-impaired | Partially collateralised | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 350 $ 698
Expected credit loss rate 3.10% 2.80%
Wholesale | Lifetime expected credit losses | Financial instruments not credit-impaired | Partially collateralised | Other corporate, commerical, and non-bank financial institutions loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 6,337 $ 5,772
Expected credit loss rate 0.70% 0.80%
Wholesale | Lifetime expected credit losses | Financial instruments not credit-impaired | Partially collateralised | UK | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 115 $ 565
Expected credit loss rate 0.90% 2.90%
Wholesale | Lifetime expected credit losses | Financial instruments not credit-impaired | Partially collateralised | Hong Kong | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 110 $ 62
Expected credit loss rate 0.30% 1.90%
Wholesale | Lifetime expected credit losses | Financial instruments not credit-impaired | – less than 50% | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 10,682 $ 5,154
Expected credit loss rate 1.40% 1.70%
Wholesale | Lifetime expected credit losses | Financial instruments not credit-impaired | – less than 50% | Other corporate, commerical, and non-bank financial institutions loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 5,009 $ 4,360
Expected credit loss rate 1.20% 1.60%
Wholesale | Lifetime expected credit losses | Financial instruments not credit-impaired | – less than 50% | UK | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 430 $ 761
Expected credit loss rate 1.40% 1.50%
Wholesale | Lifetime expected credit losses | Financial instruments not credit-impaired | – less than 50% | Hong Kong | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 9,705 $ 3,589
Expected credit loss rate 0.90% 1.30%
Wholesale | Lifetime expected credit losses | Financial instruments not credit-impaired | – 51% to 75% | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 4,770 $ 3,840
Expected credit loss rate 2.20% 2.20%
Wholesale | Lifetime expected credit losses | Financial instruments not credit-impaired | – 51% to 75% | Other corporate, commerical, and non-bank financial institutions loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 4,855 $ 4,643
Expected credit loss rate 2.40% 2.80%
Wholesale | Lifetime expected credit losses | Financial instruments not credit-impaired | – 51% to 75% | UK | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 914 $ 1,693
Expected credit loss rate 3.80% 1.20%
Wholesale | Lifetime expected credit losses | Financial instruments not credit-impaired | – 51% to 75% | Hong Kong | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 2,927 $ 1,059
Expected credit loss rate 0.50% 2.20%
Wholesale | Lifetime expected credit losses | Financial instruments not credit-impaired | – 76% to 90% | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 915 $ 2,277
Expected credit loss rate 1.90% 0.90%
Wholesale | Lifetime expected credit losses | Financial instruments not credit-impaired | – 76% to 90% | Other corporate, commerical, and non-bank financial institutions loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 1,318 $ 1,515
Expected credit loss rate 1.50% 1.60%
Wholesale | Lifetime expected credit losses | Financial instruments not credit-impaired | – 76% to 90% | UK | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 308 $ 732
Expected credit loss rate 1.00% 0.40%
Wholesale | Lifetime expected credit losses | Financial instruments not credit-impaired | – 76% to 90% | Hong Kong | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 294 $ 1,050
Expected credit loss rate 1.70% 1.10%
Wholesale | Lifetime expected credit losses | Financial instruments not credit-impaired | – 91% to 100% | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 266 $ 638
Expected credit loss rate 2.30% 2.30%
Wholesale | Lifetime expected credit losses | Financial instruments not credit-impaired | – 91% to 100% | Other corporate, commerical, and non-bank financial institutions loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 1,919 $ 1,474
Expected credit loss rate 0.60% 0.80%
Wholesale | Lifetime expected credit losses | Financial instruments not credit-impaired | – 91% to 100% | UK | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 9 $ 8
Expected credit loss rate 5.10% 7.70%
Wholesale | Lifetime expected credit losses | Financial instruments not credit-impaired | – 91% to 100% | Hong Kong | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 43 $ 347
Expected credit loss rate 2.30% 0.50%
Wholesale | Lifetime expected credit losses | Financial instruments credit-impaired | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Collateral value $ 780 $ 570
Wholesale | Lifetime expected credit losses | Financial instruments credit-impaired | Other corporate, commerical, and non-bank financial institutions loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Collateral value 1,199 1,162
Wholesale | Lifetime expected credit losses | Financial instruments credit-impaired | UK | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Collateral value 42 69
Wholesale | Lifetime expected credit losses | Financial instruments credit-impaired | Hong Kong | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Collateral value 734 397
Wholesale | Lifetime expected credit losses | Financial instruments credit-impaired | Not collateralised | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 1,310 $ 1,704
Expected credit loss rate 64.60% 47.50%
Wholesale | Lifetime expected credit losses | Financial instruments credit-impaired | Not collateralised | Other corporate, commerical, and non-bank financial institutions loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 6,186 $ 6,870
Expected credit loss rate 43.50% 41.50%
Wholesale | Lifetime expected credit losses | Financial instruments credit-impaired | Not collateralised | UK | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 56 $ 127
Expected credit loss rate 19.60% 27.80%
Wholesale | Lifetime expected credit losses | Financial instruments credit-impaired | Not collateralised | Hong Kong | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 1,088 $ 1,404
Expected credit loss rate 66.50% 47.90%
Wholesale | Lifetime expected credit losses | Financial instruments credit-impaired | Fully collateralised by LTV ratio | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 6,942 $ 5,254
Expected credit loss rate 13.30% 7.80%
Wholesale | Lifetime expected credit losses | Financial instruments credit-impaired | Fully collateralised by LTV ratio | Other corporate, commerical, and non-bank financial institutions loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 3,611 $ 3,394
Expected credit loss rate 14.50% 8.00%
Wholesale | Lifetime expected credit losses | Financial instruments credit-impaired | Fully collateralised by LTV ratio | UK | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 354 $ 305
Expected credit loss rate 21.80% 8.20%
Wholesale | Lifetime expected credit losses | Financial instruments credit-impaired | Fully collateralised by LTV ratio | Hong Kong | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 5,467 $ 4,127
Expected credit loss rate 10.60% 5.80%
Wholesale | Lifetime expected credit losses | Financial instruments credit-impaired | Partially collateralised | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 1,093 $ 815
Expected credit loss rate 35.40% 19.70%
Wholesale | Lifetime expected credit losses | Financial instruments credit-impaired | Partially collateralised | Other corporate, commerical, and non-bank financial institutions loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 2,130 $ 2,411
Expected credit loss rate 45.60% 34.30%
Wholesale | Lifetime expected credit losses | Financial instruments credit-impaired | Partially collateralised | UK | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 67 $ 119
Expected credit loss rate 17.90% 21.10%
Wholesale | Lifetime expected credit losses | Financial instruments credit-impaired | Partially collateralised | Hong Kong | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 1,022 $ 562
Expected credit loss rate 36.70% 17.60%
Wholesale | Lifetime expected credit losses | Financial instruments credit-impaired | – less than 50% | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 2,563 $ 2,413
Expected credit loss rate 11.00% 5.70%
Wholesale | Lifetime expected credit losses | Financial instruments credit-impaired | – less than 50% | Other corporate, commerical, and non-bank financial institutions loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 1,446 $ 1,703
Expected credit loss rate 12.30% 6.90%
Wholesale | Lifetime expected credit losses | Financial instruments credit-impaired | – less than 50% | UK | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 36 $ 160
Expected credit loss rate 38.90% 8.00%
Wholesale | Lifetime expected credit losses | Financial instruments credit-impaired | – less than 50% | Hong Kong | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 2,284 $ 2,102
Expected credit loss rate 8.20% 3.80%
Wholesale | Lifetime expected credit losses | Financial instruments credit-impaired | – 51% to 75% | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 2,755 $ 1,691
Expected credit loss rate 13.50% 7.60%
Wholesale | Lifetime expected credit losses | Financial instruments credit-impaired | – 51% to 75% | Other corporate, commerical, and non-bank financial institutions loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 1,249 $ 778
Expected credit loss rate 16.70% 12.00%
Wholesale | Lifetime expected credit losses | Financial instruments credit-impaired | – 51% to 75% | UK | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 209 $ 69
Expected credit loss rate 24.90% 12.00%
Wholesale | Lifetime expected credit losses | Financial instruments credit-impaired | – 51% to 75% | Hong Kong | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 2,033 $ 1,243
Expected credit loss rate 10.90% 6.20%
Wholesale | Lifetime expected credit losses | Financial instruments credit-impaired | – 76% to 90% | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 1,055 $ 767
Expected credit loss rate 13.60% 12.50%
Wholesale | Lifetime expected credit losses | Financial instruments credit-impaired | – 76% to 90% | Other corporate, commerical, and non-bank financial institutions loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 677 $ 512
Expected credit loss rate 14.00% 7.10%
Wholesale | Lifetime expected credit losses | Financial instruments credit-impaired | – 76% to 90% | UK | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 107 $ 24
Expected credit loss rate 9.30% 10.20%
Wholesale | Lifetime expected credit losses | Financial instruments credit-impaired | – 76% to 90% | Hong Kong | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 705 $ 654
Expected credit loss rate 8.40% 11.80%
Wholesale | Lifetime expected credit losses | Financial instruments credit-impaired | – 91% to 100% | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 569 $ 383
Expected credit loss rate 21.60% 12.30%
Wholesale | Lifetime expected credit losses | Financial instruments credit-impaired | – 91% to 100% | Other corporate, commerical, and non-bank financial institutions loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 239 $ 401
Expected credit loss rate 16.70% 6.30%
Wholesale | Lifetime expected credit losses | Financial instruments credit-impaired | – 91% to 100% | UK | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 2 $ 52
Expected credit loss rate 61.20% 2.70%
Wholesale | Lifetime expected credit losses | Financial instruments credit-impaired | – 91% to 100% | Hong Kong | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 445 $ 128
Expected credit loss rate 25.20% 2.40%
Wholesale | Lifetime expected credit losses | – POCI | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Collateral value $ 33 $ 29
Wholesale | Lifetime expected credit losses | – POCI | Other corporate, commerical, and non-bank financial institutions loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Collateral value 0 1
Wholesale | Lifetime expected credit losses | – POCI | UK | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Collateral value 30 26
Wholesale | Lifetime expected credit losses | – POCI | Hong Kong | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Collateral value 3 3
Wholesale | Lifetime expected credit losses | – POCI | Not collateralised | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 6 $ 0
Expected credit loss rate 0.00% 0.00%
Wholesale | Lifetime expected credit losses | – POCI | Not collateralised | Other corporate, commerical, and non-bank financial institutions loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 215 $ 5
Expected credit loss rate 6.50% 14.20%
Wholesale | Lifetime expected credit losses | – POCI | Not collateralised | UK | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 0 $ 0
Expected credit loss rate 0.00% 0.00%
Wholesale | Lifetime expected credit losses | – POCI | Not collateralised | Hong Kong | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 6 $ 0
Expected credit loss rate 0.00% 0.00%
Wholesale | Lifetime expected credit losses | – POCI | Fully collateralised by LTV ratio | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 13 $ 0
Expected credit loss rate 0.00% 0.00%
Wholesale | Lifetime expected credit losses | – POCI | Fully collateralised by LTV ratio | Other corporate, commerical, and non-bank financial institutions loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 29 $ 21
Expected credit loss rate 55.20% 98.10%
Wholesale | Lifetime expected credit losses | – POCI | Fully collateralised by LTV ratio | UK | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 0 $ 0
Expected credit loss rate 0.00% 0.00%
Wholesale | Lifetime expected credit losses | – POCI | Fully collateralised by LTV ratio | Hong Kong | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 0 $ 0
Expected credit loss rate 0.00% 0.00%
Wholesale | Lifetime expected credit losses | – POCI | Partially collateralised | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 80 $ 64
Expected credit loss rate 57.50% 45.80%
Wholesale | Lifetime expected credit losses | – POCI | Partially collateralised | Other corporate, commerical, and non-bank financial institutions loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 0 $ 3
Expected credit loss rate 0.00% 7.00%
Wholesale | Lifetime expected credit losses | – POCI | Partially collateralised | UK | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 61 $ 46
Expected credit loss rate 47.50% 48.60%
Wholesale | Lifetime expected credit losses | – POCI | Partially collateralised | Hong Kong | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 19 $ 18
Expected credit loss rate 84.20% 38.10%
Wholesale | Lifetime expected credit losses | – POCI | – less than 50% | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 13 $ 0
Expected credit loss rate 0.00% 0.00%
Wholesale | Lifetime expected credit losses | – POCI | – less than 50% | Other corporate, commerical, and non-bank financial institutions loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 0 $ 0
Expected credit loss rate 0.00% 0.00%
Wholesale | Lifetime expected credit losses | – POCI | – less than 50% | UK | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 0 $ 0
Expected credit loss rate 0.00% 0.00%
Wholesale | Lifetime expected credit losses | – POCI | – less than 50% | Hong Kong | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 0 $ 0
Expected credit loss rate 0.00% 0.00%
Wholesale | Lifetime expected credit losses | – POCI | – 51% to 75% | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 0 $ 0
Expected credit loss rate 0.00% 0.00%
Wholesale | Lifetime expected credit losses | – POCI | – 51% to 75% | Other corporate, commerical, and non-bank financial institutions loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 29 $ 21
Expected credit loss rate 55.20% 98.10%
Wholesale | Lifetime expected credit losses | – POCI | – 51% to 75% | UK | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 0 $ 0
Expected credit loss rate 0.00% 0.00%
Wholesale | Lifetime expected credit losses | – POCI | – 51% to 75% | Hong Kong | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 0 $ 0
Expected credit loss rate 0.00% 0.00%
Wholesale | Lifetime expected credit losses | – POCI | – 76% to 90% | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 0 $ 0
Expected credit loss rate 0.00% 0.00%
Wholesale | Lifetime expected credit losses | – POCI | – 76% to 90% | Other corporate, commerical, and non-bank financial institutions loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 0 $ 0
Expected credit loss rate 0.00% 0.00%
Wholesale | Lifetime expected credit losses | – POCI | – 76% to 90% | UK | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 0 $ 0
Expected credit loss rate 0.00% 0.00%
Wholesale | Lifetime expected credit losses | – POCI | – 76% to 90% | Hong Kong | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 0 $ 0
Expected credit loss rate 0.00% 0.00%
Wholesale | Lifetime expected credit losses | – POCI | – 91% to 100% | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 0 $ 0
Expected credit loss rate 0.00% 0.00%
Wholesale | Lifetime expected credit losses | – POCI | – 91% to 100% | Other corporate, commerical, and non-bank financial institutions loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 0 $ 0
Expected credit loss rate 0.00% 0.00%
Wholesale | Lifetime expected credit losses | – POCI | – 91% to 100% | UK | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 0 $ 0
Expected credit loss rate 0.00% 0.00%
Wholesale | Lifetime expected credit losses | – POCI | – 91% to 100% | Hong Kong | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 0 $ 0
Expected credit loss rate 0.00% 0.00%