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Report Of The 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 Thousands
Dec. 31, 2023
Dec. 31, 2022
IFRS 9    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ 2,688,904,000 $ 2,619,610,000
IFRS 9 | Gross carrying amount    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments 2,700,821,000 2,632,057,000
IFRS 9 | Allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments $ (11,917,000) $ (12,447,000)
Wholesale | Commercial real estate loans and advances including loan commitments    
Disclosure of financial assets [line items]    
ECL coverage % 17.00% 11.90%
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]    
Financial assets and off-balance sheet loan commitments $ 116,545,000 $ 137,038,000
Collateral value $ 5,206,000 $ 4,297,000
ECL coverage % 2.40% 2.10%
Wholesale | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9 | Gross carrying amount | HSBC North America Holdings Inc.    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments   $ 5,300,000
Wholesale | Commercial real estate loans and advances including loan commitments | Loans and advances to customers and banks | IFRS 9 | Allowance for ECL | HSBC North America Holdings Inc.    
Disclosure of financial assets [line items]    
Financial assets and off-balance sheet loan commitments   (100,000)
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]    
Financial assets and off-balance sheet loan commitments $ 956,792,000 914,189,000
Collateral value $ 29,765,000 $ 35,213,000
ECL coverage % 0.60% 0.70%
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]    
Financial assets and off-balance sheet loan commitments $ 20,534,000 $ 23,731,000
Collateral value $ 774,000 $ 1,329,000
ECL coverage % 0.90% 1.50%
Wholesale | – UK | 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 $ 179,305,000 $ 163,301,000
Collateral value $ 4,763,000 $ 4,825,000
ECL coverage % 0.90% 0.90%
Wholesale | – Hong Kong | Commercial real estate loans and advances including loan commitments    
Disclosure of financial assets [line items]    
ECL coverage % 28.50% 18.60%
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]    
Financial assets and off-balance sheet loan commitments $ 54,099,000 $ 64,533,000
Collateral value $ 2,151,000 $ 880,000
ECL coverage % 4.00% 2.90%
Wholesale | – Hong Kong | 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 $ 184,871,000 $ 194,098,000
Collateral value $ 8,243,000 $ 9,671,000
ECL coverage % 0.60% 0.60%
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 $ 44,425,000 $ 56,378,000
ECL coverage % 4.70% 3.60%
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 $ 756,113,000 $ 720,240,000
ECL coverage % 0.60% 0.60%
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 $ 6,029,000 $ 8,766,000
ECL coverage % 0.90% 1.80%
Wholesale | Not collateralised | – UK | 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 $ 141,648,000 $ 125,823,000
ECL coverage % 1.00% 0.90%
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 $ 21,427,000 $ 27,034,000
ECL coverage % 8.80% 6.30%
Wholesale | Not collateralised | – Hong Kong | 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 $ 122,454,000 $ 120,759,000
ECL coverage % 0.50% 0.50%
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 $ 63,352,000 $ 73,239,000
ECL coverage % 1.00% 0.70%
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 $ 135,738,000 $ 124,183,000
ECL coverage % 0.50% 0.50%
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 $ 12,569,000 $ 12,690,000
ECL coverage % 0.70% 0.40%
Wholesale | Fully collateralised by LTV ratio | – UK | 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 $ 29,291,000 $ 28,402,000
ECL coverage % 0.60% 0.50%
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 $ 30,219,000 $ 36,213,000
ECL coverage % 0.80% 0.40%
Wholesale | Fully collateralised by LTV ratio | – Hong Kong | 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 $ 42,674,000 $ 51,465,000
ECL coverage % 0.50% 0.40%
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 $ 8,768,000 $ 7,421,000
ECL coverage % 1.00% 4.40%
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 $ 64,941,000 $ 69,766,000
ECL coverage % 1.30% 1.40%
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 $ 1,936,000 $ 2,275,000
ECL coverage % 2.00% 5.50%
Wholesale | Partially collateralised | – UK | 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 $ 8,366,000 $ 9,076,000
ECL coverage % 1.20% 1.20%
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 $ 2,453,000 $ 1,286,000
ECL coverage % 0.70% 4.40%
Wholesale | Partially collateralised | – Hong Kong | 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 $ 19,743,000 $ 21,874,000
ECL coverage % 1.20% 1.20%
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 $ 32,378,000 $ 36,702,000
ECL coverage % 0.70% 0.70%
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 $ 51,190,000 $ 48,068,000
ECL coverage % 0.50% 0.60%
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 $ 4,072,000 $ 3,617,000
ECL coverage % 0.60% 0.40%
Wholesale | – less than 50% | – UK | 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 $ 10,326,000 $ 9,975,000
ECL coverage % 0.50% 0.50%
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 $ 21,323,000 $ 25,042,000
ECL coverage % 0.50% 0.30%
Wholesale | – less than 50% | – Hong Kong | 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 $ 19,303,000 $ 20,447,000
ECL coverage % 0.40% 0.30%
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 $ 21,983,000 $ 27,570,000
ECL coverage % 1.10% 0.50%
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 $ 33,120,000 $ 40,069,000
ECL coverage % 0.60% 0.50%
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 $ 6,347,000 $ 7,849,000
ECL coverage % 0.60% 0.30%
Wholesale | – 51% to 75% | – UK | 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 $ 9,692,000 $ 10,603,000
ECL coverage % 0.70% 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 $ 6,554,000 $ 9,106,000
ECL coverage % 1.40% 0.50%
Wholesale | – 51% to 75% | – Hong Kong | 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 $ 14,312,000 $ 19,422,000
ECL coverage % 0.50% 0.50%
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 $ 5,031,000 $ 4,446,000
ECL coverage % 2.10% 0.80%
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 $ 13,169,000 $ 13,055,000
ECL coverage % 0.90% 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 $ 1,121,000 $ 707,000
ECL coverage % 1.50% 0.70%
Wholesale | – 76% to 90% | – UK | 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 $ 3,171,000 $ 2,569,000
ECL coverage % 1.30% 0.50%
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 $ 1,591,000 $ 1,393,000
ECL coverage % 2.30% 0.40%
Wholesale | – 76% to 90% | – Hong Kong | 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 $ 5,383,000 $ 6,734,000
ECL coverage % 0.90% 0.60%
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 $ 3,960,000 $ 4,521,000
ECL coverage % 1.90% 2.60%
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 $ 38,259,000 $ 22,991,000
ECL coverage % 0.20% 0.40%
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 $ 1,029,000 $ 517,000
ECL coverage % 0.60% 2.80%
Wholesale | – 91% to 100% | – UK | 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 $ 6,102,000 $ 5,255,000
ECL coverage % 0.30% 0.20%
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 $ 751,000 $ 672,000
ECL coverage % 1.90% 3.90%
Wholesale | – 91% to 100% | – Hong Kong | 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 $ 3,676,000 $ 4,862,000
ECL coverage % 0.50% 0.30%
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]    
Financial assets and off-balance sheet loan commitments $ 90,041,000 $ 102,955,000
Collateral value $ 4,004,000 $ 2,804,000
ECL coverage % 0.10% 0.10%
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]    
Financial assets and off-balance sheet loan commitments $ 839,167,000 $ 782,472,000
Collateral value $ 24,505,000 $ 27,775,000
ECL coverage % 0.10% 0.10%
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]    
Financial assets and off-balance sheet loan commitments $ 15,986,000 $ 18,173,000
Collateral value $ 524,000 $ 1,113,000
ECL coverage % 0.20% 0.20%
Wholesale | – stage 1 | Financial instruments not credit-impaired | – UK | 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 $ 146,376,000 $ 132,798,000
Collateral value $ 3,508,000 $ 3,470,000
ECL coverage % 0.20% 0.10%
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]    
Financial assets and off-balance sheet loan commitments $ 39,442,000 $ 48,959,000
Collateral value $ 1,569,000 $ 584,000
ECL coverage % 0.00% 0.00%
Wholesale | – stage 1 | Financial instruments not credit-impaired | – Hong Kong | 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 $ 163,034,000 $ 165,706,000
Collateral value $ 6,619,000 $ 7,737,000
ECL coverage % 0.10% 0.10%
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 $ 36,754,000 $ 43,987,000
ECL coverage % 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 $ 672,142,000 $ 632,889,000
ECL coverage % 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 $ 4,644,000 $ 5,960,000
ECL coverage % 0.40% 0.30%
Wholesale | – stage 1 | Financial instruments not credit-impaired | Not collateralised | – UK | 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 $ 117,824,000 $ 105,126,000
ECL coverage % 0.20% 0.10%
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 $ 16,889,000 $ 20,263,000
ECL coverage % 0.00% 0.00%
Wholesale | – stage 1 | Financial instruments not credit-impaired | Not collateralised | – Hong Kong | 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 $ 114,025,000 $ 109,919,000
ECL coverage % 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 $ 46,212,000 $ 54,003,000
ECL coverage % 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 $ 113,339,000 $ 94,789,000
ECL coverage % 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 $ 9,762,000 $ 10,293,000
ECL coverage % 0.10% 0.10%
Wholesale | – stage 1 | Financial instruments not credit-impaired | Fully collateralised by LTV ratio | – UK | 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 $ 22,217,000 $ 21,192,000
ECL coverage % 0.10% 0.10%
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 $ 20,783,000 $ 27,892,000
ECL coverage % 0.00% 0.00%
Wholesale | – stage 1 | Financial instruments not credit-impaired | Fully collateralised by LTV ratio | – Hong Kong | 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 $ 32,857,000 $ 38,083,000
ECL coverage % 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 $ 7,075,000 $ 4,965,000
ECL coverage % 0.10% 0.10%
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 $ 53,686,000 $ 54,794,000
ECL coverage % 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 $ 1,580,000 $ 1,920,000
ECL coverage % 0.10% 0.20%
Wholesale | – stage 1 | Financial instruments not credit-impaired | Partially collateralised | – UK | 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 $ 6,335,000 $ 6,480,000
ECL coverage % 0.20% 0.10%
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 $ 1,770,000 $ 804,000
ECL coverage % 0.00% 0.00%
Wholesale | – stage 1 | Financial instruments not credit-impaired | Partially collateralised | – Hong Kong | 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 $ 16,152,000 $ 17,704,000
ECL coverage % 0.00% 0.10%
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 $ 24,391,000 $ 29,635,000
ECL coverage % 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 $ 42,953,000 $ 36,747,000
ECL coverage % 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 $ 3,514,000 $ 2,900,000
ECL coverage % 0.10% 0.20%
Wholesale | – stage 1 | Financial instruments not credit-impaired | – less than 50% | – UK | 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 $ 7,385,000 $ 6,928,000
ECL coverage % 0.10% 0.10%
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 $ 15,425,000 $ 21,185,000
ECL coverage % 0.00% 0.00%
Wholesale | – stage 1 | Financial instruments not credit-impaired | – less than 50% | – Hong Kong | 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 $ 16,175,000 $ 15,695,000
ECL coverage % 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 $ 16,086,000 $ 18,664,000
ECL coverage % 0.10% 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 $ 24,011,000 $ 29,108,000
ECL coverage % 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 $ 4,826,000 $ 6,361,000
ECL coverage % 0.10% 0.10%
Wholesale | – stage 1 | Financial instruments not credit-impaired | – 51% to 75% | – UK | 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 $ 6,966,000 $ 7,611,000
ECL coverage % 0.10% 0.10%
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 $ 4,102,000 $ 5,365,000
ECL coverage % 0.10% 0.10%
Wholesale | – stage 1 | Financial instruments not credit-impaired | – 51% to 75% | – Hong Kong | 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 $ 9,461,000 $ 13,893,000
ECL coverage % 0.10% 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 $ 3,140,000 $ 3,220,000
ECL coverage % 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 $ 10,194,000 $ 9,643,000
ECL coverage % 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 $ 749,000 $ 556,000
ECL coverage % 0.10% 0.20%
Wholesale | – stage 1 | Financial instruments not credit-impaired | – 76% to 90% | – UK | 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 $ 2,256,000 $ 1,889,000
ECL coverage % 0.20% 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 $ 657,000 $ 995,000
ECL coverage % 0.10% 0.00%
Wholesale | – stage 1 | Financial instruments not credit-impaired | – 76% to 90% | – Hong Kong | 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 $ 4,245,000 $ 4,964,000
ECL coverage % 0.10% 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 $ 2,595,000 $ 2,484,000
ECL coverage % 0.20% 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 $ 36,181,000 $ 19,291,000
ECL coverage % 0.00% 0.10%
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 $ 673,000 $ 476,000
ECL coverage % 0.10% 0.20%
Wholesale | – stage 1 | Financial instruments not credit-impaired | – 91% to 100% | – UK | 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 $ 5,610,000 $ 4,764,000
ECL coverage % 0.10% 0.00%
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 $ 599,000 $ 347,000
ECL coverage % 0.00% 0.00%
Wholesale | – stage 1 | Financial instruments not credit-impaired | – 91% to 100% | – Hong Kong | 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 $ 2,976,000 $ 3,531,000
ECL coverage % 0.00% 0.10%
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]    
Financial assets and off-balance sheet loan commitments $ 21,792,000 $ 29,322,000
Collateral value $ 1,061,000 $ 1,192,000
ECL coverage % 2.80% 3.10%
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]    
Financial assets and off-balance sheet loan commitments $ 105,027,000 $ 119,261,000
Collateral value $ 4,266,000 $ 6,289,000
ECL coverage % 1.00% 1.00%
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]    
Financial assets and off-balance sheet loan commitments $ 4,039,000 $ 4,715,000
Collateral value $ 171,000 $ 144,000
ECL coverage % 1.50% 1.30%
Wholesale | Lifetime expected credit losses | Financial instruments not credit-impaired | – UK | 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 $ 28,045,000 $ 25,685,000
Collateral value $ 1,080,000 $ 1,197,000
ECL coverage % 1.80% 1.90%
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]    
Financial assets and off-balance sheet loan commitments $ 11,386,000 $ 12,495,000
Collateral value $ 535,000 $ 249,000
ECL coverage % 2.90% 4.70%
Wholesale | Lifetime expected credit losses | Financial instruments not credit-impaired | – Hong Kong | 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 $ 19,328,000 $ 25,973,000
Collateral value $ 1,306,000 $ 1,524,000
ECL coverage % 0.80% 0.80%
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 $ 5,128,000 $ 9,779,000
ECL coverage % 3.90% 5.70%
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 $ 76,261,000 $ 79,009,000
ECL coverage % 0.90% 1.10%
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 $ 1,288,000 $ 2,511,000
ECL coverage % 2.00% 1.50%
Wholesale | Lifetime expected credit losses | Financial instruments not credit-impaired | Not collateralised | – UK | 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 $ 20,401,000 $ 16,886,000
ECL coverage % 1.90% 2.20%
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 $ 2,323,000 $ 4,648,000
ECL coverage % 6.50% 10.60%
Wholesale | Lifetime expected credit losses | Financial instruments not credit-impaired | Not collateralised | – Hong Kong | 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 $ 7,523,000 $ 9,901,000
ECL coverage % 0.40% 0.70%
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 $ 15,177,000 $ 17,619,000
ECL coverage % 2.50% 1.80%
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 $ 19,747,000 $ 27,422,000
ECL coverage % 1.40% 1.10%
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 $ 2,512,000 $ 2,025,000
ECL coverage % 1.30% 0.90%
Wholesale | Lifetime expected credit losses | Financial instruments not credit-impaired | Fully collateralised by LTV ratio | – UK | 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 $ 5,912,000 $ 6,511,000
ECL coverage % 1.70% 1.30%
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 $ 8,447,000 $ 7,457,000
ECL coverage % 2.10% 1.10%
Wholesale | Lifetime expected credit losses | Financial instruments not credit-impaired | Fully collateralised by LTV ratio | – Hong Kong | 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 $ 8,918,000 $ 12,693,000
ECL coverage % 1.30% 1.00%
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 $ 1,487,000 $ 1,924,000
ECL coverage % 1.80% 2.20%
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 $ 9,019,000 $ 12,830,000
ECL coverage % 0.70% 0.90%
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 $ 239,000 $ 179,000
ECL coverage % 1.10% 1.10%
Wholesale | Lifetime expected credit losses | Financial instruments not credit-impaired | Partially collateralised | – UK | 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 $ 1,732,000 $ 2,288,000
ECL coverage % 1.80% 1.20%
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 $ 616,000 $ 390,000
ECL coverage % 0.80% 2.80%
Wholesale | Lifetime expected credit losses | Financial instruments not credit-impaired | Partially collateralised | – Hong Kong | 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 $ 2,887,000 $ 3,379,000
ECL coverage % 0.60% 0.60%
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 $ 7,413,000 $ 6,523,000
ECL coverage % 1.90% 1.90%
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 $ 7,069,000 $ 10,643,000
ECL coverage % 1.50% 1.10%
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 $ 507,000 $ 664,000
ECL coverage % 1.90% 0.90%
Wholesale | Lifetime expected credit losses | Financial instruments not credit-impaired | – less than 50% | – UK | 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 $ 2,340,000 $ 2,872,000
ECL coverage % 1.20% 1.00%
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 $ 5,604,000 $ 3,539,000
ECL coverage % 1.50% 1.40%
Wholesale | Lifetime expected credit losses | Financial instruments not credit-impaired | – less than 50% | – Hong Kong | 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 $ 2,898,000 $ 4,577,000
ECL coverage % 1.40% 0.90%
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 $ 5,240,000 $ 8,312,000
ECL coverage % 3.10% 1.30%
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 $ 8,222,000 $ 10,457,000
ECL coverage % 1.30% 1.20%
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 $ 1,418,000 $ 1,197,000
ECL coverage % 1.10% 0.90%
Wholesale | Lifetime expected credit losses | Financial instruments not credit-impaired | – 51% to 75% | – UK | 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 $ 2,292,000 $ 2,656,000
ECL coverage % 1.70% 1.50%
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 $ 2,140,000 $ 3,536,000
ECL coverage % 3.80% 1.00%
Wholesale | Lifetime expected credit losses | Financial instruments not credit-impaired | – 51% to 75% | – Hong Kong | 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 $ 4,515,000 $ 5,413,000
ECL coverage % 1.20% 1.20%
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 $ 1,437,000 $ 911,000
ECL coverage % 3.50% 2.10%
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 $ 2,531,000 $ 2,987,000
ECL coverage % 1.60% 1.00%
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 $ 292,000 $ 140,000
ECL coverage % 1.30% 1.40%
Wholesale | Lifetime expected credit losses | Financial instruments not credit-impaired | – 76% to 90% | – UK | 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 $ 809,000 $ 578,000
ECL coverage % 2.50% 1.90%
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 $ 619,000 $ 134,000
ECL coverage % 1.80% 0.10%
Wholesale | Lifetime expected credit losses | Financial instruments not credit-impaired | – 76% to 90% | – Hong Kong | 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 $ 863,000 $ 1,479,000
ECL coverage % 1.80% 0.70%
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 $ 1,087,000 $ 1,873,000
ECL coverage % 2.30% 3.50%
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 $ 1,925,000 $ 3,335,000
ECL coverage % 1.10% 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 $ 295,000 $ 24,000
ECL coverage % 1.60% 0.40%
Wholesale | Lifetime expected credit losses | Financial instruments not credit-impaired | – 91% to 100% | – UK | 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 $ 471,000 $ 405,000
ECL coverage % 2.10% 1.20%
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 $ 84,000 $ 248,000
ECL coverage % 0.10% 0.20%
Wholesale | Lifetime expected credit losses | Financial instruments not credit-impaired | – 91% to 100% | – Hong Kong | 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 $ 642,000 $ 1,224,000
ECL coverage % 0.40% 0.30%
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]    
Financial assets and off-balance sheet loan commitments $ 4,662,000 $ 4,742,000
Collateral value $ 115,000 $ 293,000
ECL coverage % 45.60% 39.10%
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]    
Financial assets and off-balance sheet loan commitments $ 12,564,000 $ 12,346,000
Collateral value $ 993,000 $ 1,133,000
ECL coverage % 32.50% 34.30%
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]    
Financial assets and off-balance sheet loan commitments $ 474,000 $ 843,000
Collateral value $ 62,000 $ 72,000
ECL coverage % 17.10% 29.50%
Wholesale | Lifetime expected credit losses | Financial instruments credit-impaired | – UK | 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 $ 4,884,000 $ 4,790,000
Collateral value $ 175,000 $ 158,000
ECL coverage % 18.30% 16.40%
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]    
Financial assets and off-balance sheet loan commitments $ 3,256,000 $ 3,060,000
Collateral value $ 39,000 $ 39,000
ECL coverage % 55.50% 42.50%
Wholesale | Lifetime expected credit losses | Financial instruments credit-impaired | – Hong Kong | 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 $ 2,487,000 $ 2,381,000
Collateral value $ 318,000 $ 397,000
ECL coverage % 31.80% 33.20%
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 $ 2,543,000 $ 2,612,000
ECL coverage % 72.40% 53.70%
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 $ 7,702,000 $ 8,278,000
ECL coverage % 40.00% 38.40%
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 $ 97,000 $ 295,000
ECL coverage % 12.40% 35.30%
Wholesale | Lifetime expected credit losses | Financial instruments credit-impaired | Not collateralised | – UK | 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 $ 3,423,000 $ 3,783,000
ECL coverage % 23.20% 17.80%
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 $ 2,215,000 $ 2,123,000
ECL coverage % 78.70% 56.90%
Wholesale | Lifetime expected credit losses | Financial instruments credit-impaired | Not collateralised | – Hong Kong | 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 $ 906,000 $ 939,000
ECL coverage % 57.50% 56.00%
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 $ 1,963,000 $ 1,617,000
ECL coverage % 12.00% 10.90%
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 $ 2,629,000 $ 1,948,000
ECL coverage % 10.70% 13.70%
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 $ 295,000 $ 372,000
ECL coverage % 13.90% 6.50%
Wholesale | Lifetime expected credit losses | Financial instruments credit-impaired | Fully collateralised by LTV ratio | – UK | 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 $ 1,162,000 $ 699,000
ECL coverage % 3.70% 4.60%
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 $ 989,000 $ 864,000
ECL coverage % 5.00% 5.20%
Wholesale | Lifetime expected credit losses | Financial instruments credit-impaired | Fully collateralised by LTV ratio | – Hong Kong | 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 $ 877,000 $ 665,000
ECL coverage % 6.60% 3.80%
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 $ 156,000 $ 513,000
ECL coverage % 30.20% 54.20%
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 $ 2,233,000 $ 2,120,000
ECL coverage % 32.20% 37.30%
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 $ 82,000 $ 176,000
ECL coverage % 34.20% 68.80%
Wholesale | Lifetime expected credit losses | Financial instruments credit-impaired | Partially collateralised | – UK | 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 $ 299,000 $ 308,000
ECL coverage % 18.40% 25.60%
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 $ 52,000 $ 73,000
ECL coverage % 24.50% 61.60%
Wholesale | Lifetime expected credit losses | Financial instruments credit-impaired | Partially collateralised | – Hong Kong | 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 $ 704,000 $ 777,000
ECL coverage % 30.20% 30.90%
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 $ 574,000 $ 544,000
ECL coverage % 13.10% 16.50%
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 $ 1,168,000 $ 678,000
ECL coverage % 11.80% 18.60%
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 $ 51,000 $ 53,000
ECL coverage % 21.60% 3.80%
Wholesale | Lifetime expected credit losses | Financial instruments credit-impaired | – less than 50% | – UK | 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 $ 601,000 $ 175,000
ECL coverage % 1.30% 3.40%
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 $ 294,000 $ 318,000
ECL coverage % 1.40% 2.20%
Wholesale | Lifetime expected credit losses | Financial instruments credit-impaired | – less than 50% | – Hong Kong | 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 $ 230,000 $ 175,000
ECL coverage % 11.80% 1.70%
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 $ 657,000 $ 594,000
ECL coverage % 9.30% 4.40%
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 $ 887,000 $ 503,000
ECL coverage % 6.40% 11.30%
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 $ 103,000 $ 291,000
ECL coverage % 16.40% 2.10%
Wholesale | Lifetime expected credit losses | Financial instruments credit-impaired | – 51% to 75% | – UK | 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 $ 434,000 $ 336,000
ECL coverage % 3.60% 6.50%
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 $ 312,000 $ 205,000
ECL coverage % 2.10% 3.40%
Wholesale | Lifetime expected credit losses | Financial instruments credit-impaired | – 51% to 75% | – Hong Kong | 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 $ 336,000 $ 115,000
ECL coverage % 3.10% 7.80%
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 $ 454,000 $ 315,000
ECL coverage % 11.80% 4.10%
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 $ 421,000 $ 402,000
ECL coverage % 10.30% 4.70%
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 $ 80,000 $ 11,000
ECL coverage % 14.90% 18.20%
Wholesale | Lifetime expected credit losses | Financial instruments credit-impaired | – 76% to 90% | – UK | 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 $ 106,000 $ 102,000
ECL coverage % 15.80% 1.00%
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 $ 315,000 $ 264,000
ECL coverage % 8.00% 1.90%
Wholesale | Lifetime expected credit losses | Financial instruments credit-impaired | – 76% to 90% | – Hong Kong | 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 $ 253,000 $ 268,000
ECL coverage % 2.00% 0.40%
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 $ 278,000 $ 164,000
ECL coverage % 16.60% 28.70%
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 $ 153,000 $ 365,000
ECL coverage % 27.60% 17.50%
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 $ 61,000 $ 17,000
ECL coverage % 1.90% 76.50%
Wholesale | Lifetime expected credit losses | Financial instruments credit-impaired | – 91% to 100% | – UK | 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 $ 21,000 $ 86,000
ECL coverage % 14.50% 3.50%
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 $ 68,000 $ 77,000
ECL coverage % 20.50% 32.50%
Wholesale | Lifetime expected credit losses | Financial instruments credit-impaired | – 91% to 100% | – Hong Kong | 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 $ 58,000 $ 107,000
ECL coverage % 27.00% 10.30%
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]    
Financial assets and off-balance sheet loan commitments $ 50,000 $ 19,000
Collateral value $ 26,000 $ 8,000
ECL coverage % 14.50% 0.00%
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]    
Financial assets and off-balance sheet loan commitments $ 34,000 $ 110,000
Collateral value $ 1,000 $ 16,000
ECL coverage % 67.10% 34.60%
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]    
Financial assets and off-balance sheet loan commitments $ 35,000 $ 0
Collateral value $ 17,000 $ 0
ECL coverage % 20.70% 0.00%
Wholesale | Lifetime expected credit losses | – POCI | – UK | 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 $ 28,000
Collateral value $ 0 $ 0
ECL coverage % 0.00% 3.60%
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]    
Financial assets and off-balance sheet loan commitments $ 15,000 $ 19,000
Collateral value $ 8,000 $ 8,000
ECL coverage % 0.00% 0.00%
Wholesale | Lifetime expected credit losses | – POCI | – Hong Kong | 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 $ 22,000 $ 38,000
Collateral value $ 0 $ 13,000
ECL coverage % 94.70% 57.90%
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 $ 0 $ 0
ECL coverage % 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 $ 8,000 $ 64,000
ECL coverage % 6.80% 18.80%
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
ECL coverage % 0.00% 0.00%
Wholesale | Lifetime expected credit losses | – POCI | Not collateralised | – UK | 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 $ 28,000
ECL coverage % 0.00% 3.60%
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 $ 0 $ 0
ECL coverage % 0.00% 0.00%
Wholesale | Lifetime expected credit losses | – POCI | Not collateralised | – Hong Kong | 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
ECL coverage % 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 $ 0 $ 0
ECL coverage % 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 $ 23,000 $ 24,000
ECL coverage % 89.80% 91.70%
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
ECL coverage % 0.00% 0.00%
Wholesale | Lifetime expected credit losses | – POCI | Fully collateralised by LTV ratio | – UK | 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
ECL coverage % 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
ECL coverage % 0.00% 0.00%
Wholesale | Lifetime expected credit losses | – POCI | Fully collateralised by LTV ratio | – Hong Kong | 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 $ 22,000 $ 24,000
ECL coverage % 94.70% 91.70%
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 $ 50,000 $ 19,000
ECL coverage % 14.50% 0.00%
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 $ 3,000 $ 22,000
ECL coverage % 38.40% 18.20%
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 $ 35,000 $ 0
ECL coverage % 20.70% 0.00%
Wholesale | Lifetime expected credit losses | – POCI | Partially collateralised | – UK | 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
ECL coverage % 0.00% 0.00%
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 $ 15,000 $ 19,000
ECL coverage % 0.00% 0.00%
Wholesale | Lifetime expected credit losses | – POCI | Partially collateralised | – Hong Kong | 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 $ 14,000
ECL coverage % 0.00% 0.00%
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 $ 0 $ 0
ECL coverage % 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
ECL coverage % 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
ECL coverage % 0.00% 0.00%
Wholesale | Lifetime expected credit losses | – POCI | – less than 50% | – UK | 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
ECL coverage % 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
ECL coverage % 0.00% 0.00%
Wholesale | Lifetime expected credit losses | – POCI | – less than 50% | – Hong Kong | 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
ECL coverage % 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
ECL coverage % 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 $ 0 $ 1,000
ECL coverage % 0.00% 0.00%
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
ECL coverage % 0.00% 0.00%
Wholesale | Lifetime expected credit losses | – POCI | – 51% to 75% | – UK | 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
ECL coverage % 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
ECL coverage % 0.00% 0.00%
Wholesale | Lifetime expected credit losses | – POCI | – 51% to 75% | – Hong Kong | 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 $ 1,000
ECL coverage % 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
ECL coverage % 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 $ 23,000 $ 23,000
ECL coverage % 90.60% 95.70%
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
ECL coverage % 0.00% 0.00%
Wholesale | Lifetime expected credit losses | – POCI | – 76% to 90% | – UK | 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
ECL coverage % 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
ECL coverage % 0.00% 0.00%
Wholesale | Lifetime expected credit losses | – POCI | – 76% to 90% | – Hong Kong | 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 $ 22,000 $ 23,000
ECL coverage % 94.70% 95.70%
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
ECL coverage % 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
ECL coverage % 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
ECL coverage % 0.00% 0.00%
Wholesale | Lifetime expected credit losses | – POCI | – 91% to 100% | – UK | 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
ECL coverage % 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
ECL coverage % 0.00% 0.00%
Wholesale | Lifetime expected credit losses | – POCI | – 91% to 100% | – Hong Kong | 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
ECL coverage % 0.00% 0.00%