| Report Of The Directors Financial Review Risk Report - Distribution of financial instruments to which the impairment requirements in IFRS 9 are applied, by credit quality and stage allocation (Details) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020 |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | $ 2,855,948 | $ 2,880,751 |
| Off-balance sheet commitments | 273,192 | 262,877 |
| Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 273,371 | 263,103 |
| Allowance for ECL | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | (179) | (226) |
| Loans and other credit-related commitments | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 187,837 | 184,989 |
| Loans and other credit-related commitments | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 187,837 | 184,989 |
| Loans and other credit-related commitments | Allowance for ECL | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 0 | 0 |
| Loans and advances to customers at amortised cost | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 1,045,814 | 1,037,987 |
| Loans and advances to banks at amortised cost | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 83,136 | 81,616 |
| Debt securities | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 97,302 | 88,639 |
| Financial assets at amortised cost, category | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 97,302 | 88,639 |
| Financial assets at amortised cost, category | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 2,676,167 | 2,584,710 |
| Financial assets at amortised cost, category | Allowance for ECL | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | (12,068) | (15,566) |
| Financial assets at amortised cost, category | Loans and advances to customers at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 1,057,231 | 1,052,477 |
| Financial assets at amortised cost, category | Loans and advances to customers at amortised cost | Allowance for ECL | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | (11,417) | (14,490) |
| Financial assets at amortised cost, category | Loans and advances to banks at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 83,153 | 81,658 |
| Financial assets at amortised cost, category | Loans and advances to banks at amortised cost | Allowance for ECL | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | (17) | (42) |
| Financial assets at amortised cost, category | Other | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 880,351 | 772,408 |
| Financial assets at amortised cost, category | Other | Allowance for ECL | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | (193) | (175) |
| Financial assets at amortised cost, category | Debt securities | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 75,668 | 76,882 |
| Financial assets at amortised cost, category | – stage 1 | Non-credit impaired | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 2,494,993 | 2,336,365 |
| Financial assets at amortised cost, category | – stage 1 | Non-credit impaired | Allowance for ECL | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | (1,648) | (2,414) |
| Financial assets at amortised cost, category | – stage 1 | Non-credit impaired | Loans and advances to customers at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 918,936 | 869,920 |
| Financial assets at amortised cost, category | – stage 1 | Non-credit impaired | Loans and advances to customers at amortised cost | Allowance for ECL | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | (1,367) | (1,974) |
| Financial assets at amortised cost, category | – stage 1 | Non-credit impaired | Loans and advances to banks at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 81,636 | 79,654 |
| Financial assets at amortised cost, category | – stage 1 | Non-credit impaired | Loans and advances to banks at amortised cost | Allowance for ECL | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | (14) | (33) |
| Financial assets at amortised cost, category | – stage 1 | Non-credit impaired | Other | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 875,016 | 768,216 |
| Financial assets at amortised cost, category | – stage 1 | Non-credit impaired | Other | Allowance for ECL | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | (91) | (80) |
| Financial assets at amortised cost, category | Lifetime expected credit losses | Non-credit impaired | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 160,756 | 227,405 |
| Financial assets at amortised cost, category | Lifetime expected credit losses | Non-credit impaired | Allowance for ECL | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | (3,380) | (5,445) |
| Financial assets at amortised cost, category | Lifetime expected credit losses | Non-credit impaired | Loans and advances to customers at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 119,224 | 163,185 |
| Financial assets at amortised cost, category | Lifetime expected credit losses | Non-credit impaired | Loans and advances to customers at amortised cost | Allowance for ECL | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | (3,119) | (4,965) |
| Financial assets at amortised cost, category | Lifetime expected credit losses | Non-credit impaired | Loans and advances to banks at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 1,517 | 2,004 |
| Financial assets at amortised cost, category | Lifetime expected credit losses | Non-credit impaired | Loans and advances to banks at amortised cost | Allowance for ECL | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | (3) | (9) |
| Financial assets at amortised cost, category | Lifetime expected credit losses | Non-credit impaired | Other | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 4,988 | 3,975 |
| Financial assets at amortised cost, category | Lifetime expected credit losses | Non-credit impaired | Other | Allowance for ECL | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | (54) | (44) |
| Financial assets at amortised cost, category | Lifetime expected credit losses | Credit impaired | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 20,101 | 20,621 |
| Financial assets at amortised cost, category | Lifetime expected credit losses | Credit impaired | Allowance for ECL | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | (6,970) | (7,585) |
| Financial assets at amortised cost, category | Lifetime expected credit losses | Credit impaired | Loans and advances to customers at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 18,797 | 19,095 |
| Financial assets at amortised cost, category | Lifetime expected credit losses | Credit impaired | Loans and advances to customers at amortised cost | Allowance for ECL | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | (6,867) | (7,439) |
| Financial assets at amortised cost, category | Lifetime expected credit losses | Credit impaired | Loans and advances to banks at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 0 | 0 |
| Financial assets at amortised cost, category | Lifetime expected credit losses | Credit impaired | Loans and advances to banks at amortised cost | Allowance for ECL | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 0 | 0 |
| Financial assets at amortised cost, category | Lifetime expected credit losses | Credit impaired | Other | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 304 | 177 |
| Financial assets at amortised cost, category | Lifetime expected credit losses | Credit impaired | Other | Allowance for ECL | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | (42) | (42) |
| Financial assets at amortised cost, category | Lifetime expected credit losses | – POCI | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 317 | 319 |
| Financial assets at amortised cost, category | Lifetime expected credit losses | – POCI | Allowance for ECL | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | (70) | (122) |
| Financial assets at amortised cost, category | Lifetime expected credit losses | – POCI | Loans and advances to customers at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 274 | 277 |
| Financial assets at amortised cost, category | Lifetime expected credit losses | – POCI | Loans and advances to customers at amortised cost | Allowance for ECL | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | (64) | (112) |
| Financial assets at amortised cost, category | Lifetime expected credit losses | – POCI | Loans and advances to banks at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 0 | 0 |
| Financial assets at amortised cost, category | Lifetime expected credit losses | – POCI | Loans and advances to banks at amortised cost | Allowance for ECL | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 0 | 0 |
| Financial assets at amortised cost, category | Lifetime expected credit losses | – POCI | Other | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 43 | 40 |
| Financial assets at amortised cost, category | Lifetime expected credit losses | – POCI | Other | Allowance for ECL | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | (6) | (9) |
| Financial assets measured at fair value through other comprehensive income, category | Debt securities | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 347,203 | 399,717 |
| Financial assets measured at fair value through other comprehensive income, category | Debt securities | Allowance for ECL | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | (96) | (141) |
| Strong | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 94,211 | 85,474 |
| Strong | Loans and other credit-related commitments | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 62,701 | 59,392 |
| Good | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 97,224 | 90,573 |
| Good | Loans and other credit-related commitments | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 65,031 | 62,664 |
| Satisfactory | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 75,711 | 80,922 |
| Satisfactory | Loans and other credit-related commitments | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 56,446 | 59,666 |
| Sub- standard | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 5,354 | 4,949 |
| Sub- standard | Loans and other credit-related commitments | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 3,327 | 2,837 |
| Credit impaired | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 871 | 1,185 |
| IFRS 9 | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 654,991 | 677,308 |
| Financial assets and off-balance sheet loan commitments | 2,664,099 | 2,569,144 |
| IFRS 9 | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 2,020,735 | 1,906,543 |
| Off-balance sheet commitments | 655,432 | 678,167 |
| Financial assets and off-balance sheet loan commitments | 2,676,167 | 2,584,710 |
| IFRS 9 | Allowance for ECL | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | (11,627) | (14,707) |
| Off-balance sheet commitments | (441) | (859) |
| Financial assets and off-balance sheet loan commitments | (12,068) | (15,566) |
| IFRS 9 | Loans and other credit-related commitments | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 627,258 | 659,049 |
| IFRS 9 | Loans and other credit-related commitments | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 627,637 | 659,783 |
| IFRS 9 | Loans and other credit-related commitments | Allowance for ECL | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | (379) | (734) |
| IFRS 9 | Financial guarantees | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 27,733 | 18,259 |
| IFRS 9 | Financial guarantees | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 27,795 | 18,384 |
| IFRS 9 | Financial guarantees | Allowance for ECL | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | (62) | (125) |
| IFRS 9 | Loans and advances to customers at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 1,057,231 | 1,052,477 |
| IFRS 9 | Loans and advances to customers at amortised cost | Allowance for ECL | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | (11,417) | (14,490) |
| IFRS 9 | Loans and advances to banks at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 83,153 | 81,658 |
| IFRS 9 | Loans and advances to banks at amortised cost | Allowance for ECL | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | (17) | (42) |
| IFRS 9 | Other | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 880,351 | 772,408 |
| IFRS 9 | Other | Allowance for ECL | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | (193) | (175) |
| IFRS 9 | – stage 1 | Non-credit impaired | Loans and other credit-related commitments | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 594,308 | 604,195 |
| IFRS 9 | – stage 1 | Non-credit impaired | Loans and other credit-related commitments | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 594,473 | 604,485 |
| IFRS 9 | – stage 1 | Non-credit impaired | Loans and other credit-related commitments | Allowance for ECL | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | (165) | (290) |
| IFRS 9 | – stage 1 | Non-credit impaired | Financial guarantees | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 24,921 | 14,053 |
| IFRS 9 | – stage 1 | Non-credit impaired | Financial guarantees | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 24,932 | 14,090 |
| IFRS 9 | – stage 1 | Non-credit impaired | Financial guarantees | Allowance for ECL | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | (11) | (37) |
| IFRS 9 | Lifetime expected credit losses | Non-credit impaired | Loans and other credit-related commitments | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 32,215 | 53,852 |
| IFRS 9 | Lifetime expected credit losses | Non-credit impaired | Loans and other credit-related commitments | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 32,389 | 54,217 |
| IFRS 9 | Lifetime expected credit losses | Non-credit impaired | Loans and other credit-related commitments | Allowance for ECL | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | (174) | (365) |
| IFRS 9 | Lifetime expected credit losses | Non-credit impaired | Financial guarantees | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 2,608 | 3,962 |
| IFRS 9 | Lifetime expected credit losses | Non-credit impaired | Financial guarantees | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 2,638 | 4,024 |
| IFRS 9 | Lifetime expected credit losses | Non-credit impaired | Financial guarantees | Allowance for ECL | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | (30) | (62) |
| IFRS 9 | Lifetime expected credit losses | Credit impaired | Loans and other credit-related commitments | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 735 | 1,002 |
| IFRS 9 | Lifetime expected credit losses | Credit impaired | Loans and other credit-related commitments | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 775 | 1,080 |
| IFRS 9 | Lifetime expected credit losses | Credit impaired | Loans and other credit-related commitments | Allowance for ECL | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | (40) | (78) |
| IFRS 9 | Lifetime expected credit losses | Credit impaired | Financial guarantees | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 204 | 243 |
| IFRS 9 | Lifetime expected credit losses | Credit impaired | Financial guarantees | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 225 | 269 |
| IFRS 9 | Lifetime expected credit losses | Credit impaired | Financial guarantees | Allowance for ECL | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | (21) | (26) |
| IFRS 9 | Lifetime expected credit losses | – POCI | Loans and other credit-related commitments | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 0 | 0 |
| IFRS 9 | Lifetime expected credit losses | – POCI | Loans and other credit-related commitments | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 0 | 1 |
| IFRS 9 | Lifetime expected credit losses | – POCI | Loans and other credit-related commitments | Allowance for ECL | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 0 | (1) |
| IFRS 9 | Lifetime expected credit losses | – POCI | Financial guarantees | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 0 | 1 |
| IFRS 9 | Lifetime expected credit losses | – POCI | Financial guarantees | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 0 | 1 |
| IFRS 9 | Lifetime expected credit losses | – POCI | Financial guarantees | Allowance for ECL | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 0 | 0 |
| IFRS 9 | Financial assets at amortised cost, category | Loans and advances to customers at amortised cost | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 1,045,814 | 1,037,987 |
| IFRS 9 | Financial assets at amortised cost, category | Loans and advances to customers at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 1,057,231 | 1,052,477 |
| IFRS 9 | Financial assets at amortised cost, category | Loans and advances to customers at amortised cost | Allowance for ECL | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | (11,417) | (14,490) |
| IFRS 9 | Financial assets at amortised cost, category | Loans and advances to banks at amortised cost | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 83,136 | 81,616 |
| IFRS 9 | Financial assets at amortised cost, category | Loans and advances to banks at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 83,153 | 81,658 |
| IFRS 9 | Financial assets at amortised cost, category | Loans and advances to banks at amortised cost | Allowance for ECL | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | (17) | (42) |
| IFRS 9 | Financial assets at amortised cost, category | Other | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 880,158 | 772,233 |
| IFRS 9 | Financial assets at amortised cost, category | Other | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 880,351 | 772,408 |
| IFRS 9 | Financial assets at amortised cost, category | Other | Allowance for ECL | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | (193) | (175) |
| IFRS 9 | Financial assets at amortised cost, category | – stage 1 | Non-credit impaired | Loans and advances to customers at amortised cost | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 917,569 | 867,946 |
| IFRS 9 | Financial assets at amortised cost, category | – stage 1 | Non-credit impaired | Loans and advances to customers at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 918,936 | 869,920 |
| IFRS 9 | Financial assets at amortised cost, category | – stage 1 | Non-credit impaired | Loans and advances to customers at amortised cost | Allowance for ECL | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | (1,367) | (1,974) |
| IFRS 9 | Financial assets at amortised cost, category | – stage 1 | Non-credit impaired | Loans and advances to banks at amortised cost | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 81,622 | 79,621 |
| IFRS 9 | Financial assets at amortised cost, category | – stage 1 | Non-credit impaired | Loans and advances to banks at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 81,636 | 79,654 |
| IFRS 9 | Financial assets at amortised cost, category | – stage 1 | Non-credit impaired | Loans and advances to banks at amortised cost | Allowance for ECL | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | (14) | (33) |
| IFRS 9 | Financial assets at amortised cost, category | – stage 1 | Non-credit impaired | Other | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 874,925 | 768,136 |
| IFRS 9 | Financial assets at amortised cost, category | – stage 1 | Non-credit impaired | Other | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 875,016 | 768,216 |
| IFRS 9 | Financial assets at amortised cost, category | – stage 1 | Non-credit impaired | Other | Allowance for ECL | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | (91) | (80) |
| IFRS 9 | Financial assets at amortised cost, category | Lifetime expected credit losses | Non-credit impaired | Loans and advances to customers at amortised cost | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 116,105 | 158,220 |
| IFRS 9 | Financial assets at amortised cost, category | Lifetime expected credit losses | Non-credit impaired | Loans and advances to customers at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 119,224 | 163,185 |
| IFRS 9 | Financial assets at amortised cost, category | Lifetime expected credit losses | Non-credit impaired | Loans and advances to customers at amortised cost | Allowance for ECL | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | (3,119) | (4,965) |
| IFRS 9 | Financial assets at amortised cost, category | Lifetime expected credit losses | Non-credit impaired | Loans and advances to banks at amortised cost | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 1,514 | 1,995 |
| IFRS 9 | Financial assets at amortised cost, category | Lifetime expected credit losses | Non-credit impaired | Loans and advances to banks at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 1,517 | 2,004 |
| IFRS 9 | Financial assets at amortised cost, category | Lifetime expected credit losses | Non-credit impaired | Loans and advances to banks at amortised cost | Allowance for ECL | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | (3) | (9) |
| IFRS 9 | Financial assets at amortised cost, category | Lifetime expected credit losses | Non-credit impaired | Other | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 4,934 | 3,931 |
| IFRS 9 | Financial assets at amortised cost, category | Lifetime expected credit losses | Non-credit impaired | Other | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 4,988 | 3,975 |
| IFRS 9 | Financial assets at amortised cost, category | Lifetime expected credit losses | Non-credit impaired | Other | Allowance for ECL | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | (54) | (44) |
| IFRS 9 | Financial assets at amortised cost, category | Lifetime expected credit losses | Credit impaired | Loans and advances to customers at amortised cost | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 11,930 | 11,656 |
| IFRS 9 | Financial assets at amortised cost, category | Lifetime expected credit losses | Credit impaired | Loans and advances to customers at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 18,797 | 19,095 |
| IFRS 9 | Financial assets at amortised cost, category | Lifetime expected credit losses | Credit impaired | Loans and advances to customers at amortised cost | Allowance for ECL | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | (6,867) | (7,439) |
| IFRS 9 | Financial assets at amortised cost, category | Lifetime expected credit losses | Credit impaired | Loans and advances to banks at amortised cost | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 0 | 0 |
| IFRS 9 | Financial assets at amortised cost, category | Lifetime expected credit losses | Credit impaired | Loans and advances to banks at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 0 | 0 |
| IFRS 9 | Financial assets at amortised cost, category | Lifetime expected credit losses | Credit impaired | Loans and advances to banks at amortised cost | Allowance for ECL | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 0 | 0 |
| IFRS 9 | Financial assets at amortised cost, category | Lifetime expected credit losses | Credit impaired | Other | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 262 | 135 |
| IFRS 9 | Financial assets at amortised cost, category | Lifetime expected credit losses | Credit impaired | Other | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 304 | 177 |
| IFRS 9 | Financial assets at amortised cost, category | Lifetime expected credit losses | Credit impaired | Other | Allowance for ECL | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | (42) | (42) |
| IFRS 9 | Financial assets at amortised cost, category | Lifetime expected credit losses | – POCI | Loans and advances to customers at amortised cost | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 210 | 165 |
| IFRS 9 | Financial assets at amortised cost, category | Lifetime expected credit losses | – POCI | Loans and advances to customers at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 274 | 277 |
| IFRS 9 | Financial assets at amortised cost, category | Lifetime expected credit losses | – POCI | Loans and advances to customers at amortised cost | Allowance for ECL | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | (64) | (112) |
| IFRS 9 | Financial assets at amortised cost, category | Lifetime expected credit losses | – POCI | Loans and advances to banks at amortised cost | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 0 | 0 |
| IFRS 9 | Financial assets at amortised cost, category | Lifetime expected credit losses | – POCI | Loans and advances to banks at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 0 | 0 |
| IFRS 9 | Financial assets at amortised cost, category | Lifetime expected credit losses | – POCI | Loans and advances to banks at amortised cost | Allowance for ECL | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 0 | 0 |
| IFRS 9 | Financial assets at amortised cost, category | Lifetime expected credit losses | – POCI | Other | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 37 | 31 |
| IFRS 9 | Financial assets at amortised cost, category | Lifetime expected credit losses | – POCI | Other | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 43 | 40 |
| IFRS 9 | Financial assets at amortised cost, category | Lifetime expected credit losses | – POCI | Other | Allowance for ECL | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | (6) | (9) |
| IFRS 9 | Financial assets measured at fair value through other comprehensive income, category | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 345,173 | 391,762 |
| IFRS 9 | Financial assets measured at fair value through other comprehensive income, category | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 345,269 | 391,903 |
| IFRS 9 | Financial assets measured at fair value through other comprehensive income, category | Allowance for ECL | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | (96) | (141) |
| IFRS 9 | Financial assets measured at fair value through other comprehensive income, category | Debt securities | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 345,173 | 391,762 |
| IFRS 9 | Financial assets measured at fair value through other comprehensive income, category | Debt securities | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 345,269 | 391,903 |
| IFRS 9 | Financial assets measured at fair value through other comprehensive income, category | Debt securities | Allowance for ECL | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | (96) | (141) |
| IFRS 9 | Financial assets measured at fair value through other comprehensive income, category | – stage 1 | Non-credit impaired | Debt securities | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 343,040 | 390,105 |
| IFRS 9 | Financial assets measured at fair value through other comprehensive income, category | – stage 1 | Non-credit impaired | Debt securities | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 343,107 | 390,193 |
| IFRS 9 | Financial assets measured at fair value through other comprehensive income, category | – stage 1 | Non-credit impaired | Debt securities | Allowance for ECL | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | (67) | (88) |
| IFRS 9 | Financial assets measured at fair value through other comprehensive income, category | Lifetime expected credit losses | Non-credit impaired | Debt securities | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 2,094 | 1,384 |
| IFRS 9 | Financial assets measured at fair value through other comprehensive income, category | Lifetime expected credit losses | Non-credit impaired | Debt securities | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 2,116 | 1,404 |
| IFRS 9 | Financial assets measured at fair value through other comprehensive income, category | Lifetime expected credit losses | Non-credit impaired | Debt securities | Allowance for ECL | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | (22) | (20) |
| IFRS 9 | Financial assets measured at fair value through other comprehensive income, category | Lifetime expected credit losses | Credit impaired | Debt securities | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 0 | 234 |
| IFRS 9 | Financial assets measured at fair value through other comprehensive income, category | Lifetime expected credit losses | Credit impaired | Debt securities | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 0 | 257 |
| IFRS 9 | Financial assets measured at fair value through other comprehensive income, category | Lifetime expected credit losses | Credit impaired | Debt securities | Allowance for ECL | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 0 | (23) |
| IFRS 9 | Financial assets measured at fair value through other comprehensive income, category | Lifetime expected credit losses | – POCI | Debt securities | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 39 | 39 |
| IFRS 9 | Financial assets measured at fair value through other comprehensive income, category | Lifetime expected credit losses | – POCI | Debt securities | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 46 | 49 |
| IFRS 9 | Financial assets measured at fair value through other comprehensive income, category | Lifetime expected credit losses | – POCI | Debt securities | Allowance for ECL | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | (7) | (10) |
| IFRS 9 | Strong | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 406,376 | 407,267 |
| Financial assets and off-balance sheet loan commitments | 1,798,075 | 1,668,047 |
| IFRS 9 | Strong | Loans and other credit-related commitments | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 389,865 | 400,911 |
| IFRS 9 | Strong | Financial guarantees | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 16,511 | 6,356 |
| IFRS 9 | Strong | – stage 1 | Non-credit impaired | Loans and other credit-related commitments | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 387,434 | 396,028 |
| IFRS 9 | Strong | – stage 1 | Non-credit impaired | Financial guarantees | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 16,351 | 6,286 |
| IFRS 9 | Strong | Lifetime expected credit losses | Non-credit impaired | Loans and other credit-related commitments | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 2,431 | 4,883 |
| IFRS 9 | Strong | Lifetime expected credit losses | Non-credit impaired | Financial guarantees | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 160 | 70 |
| IFRS 9 | Strong | Lifetime expected credit losses | Credit impaired | Loans and other credit-related commitments | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 0 | 0 |
| IFRS 9 | Strong | Lifetime expected credit losses | Credit impaired | Financial guarantees | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 0 | 0 |
| IFRS 9 | Strong | Lifetime expected credit losses | – POCI | Loans and other credit-related commitments | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 0 | 0 |
| IFRS 9 | Strong | Lifetime expected credit losses | – POCI | Financial guarantees | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 0 | 0 |
| IFRS 9 | Strong | Financial assets at amortised cost, category | Loans and advances to customers at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 544,695 | 506,231 |
| IFRS 9 | Strong | Financial assets at amortised cost, category | Loans and advances to banks at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 72,978 | 71,318 |
| IFRS 9 | Strong | Financial assets at amortised cost, category | Other | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 774,026 | 683,231 |
| IFRS 9 | Strong | Financial assets at amortised cost, category | – stage 1 | Non-credit impaired | Loans and advances to customers at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 537,642 | 499,836 |
| IFRS 9 | Strong | Financial assets at amortised cost, category | – stage 1 | Non-credit impaired | Loans and advances to banks at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 72,903 | 71,126 |
| IFRS 9 | Strong | Financial assets at amortised cost, category | – stage 1 | Non-credit impaired | Other | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 773,427 | 682,412 |
| IFRS 9 | Strong | Financial assets at amortised cost, category | Lifetime expected credit losses | Non-credit impaired | Loans and advances to customers at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 7,053 | 6,395 |
| IFRS 9 | Strong | Financial assets at amortised cost, category | Lifetime expected credit losses | Non-credit impaired | Loans and advances to banks at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 75 | 192 |
| IFRS 9 | Strong | Financial assets at amortised cost, category | Lifetime expected credit losses | Non-credit impaired | Other | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 599 | 819 |
| IFRS 9 | Strong | Financial assets at amortised cost, category | Lifetime expected credit losses | Credit impaired | Loans and advances to customers at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 0 | 0 |
| IFRS 9 | Strong | Financial assets at amortised cost, category | Lifetime expected credit losses | Credit impaired | Loans and advances to banks at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 0 | 0 |
| IFRS 9 | Strong | Financial assets at amortised cost, category | Lifetime expected credit losses | Credit impaired | Other | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 0 | 0 |
| IFRS 9 | Strong | Financial assets at amortised cost, category | Lifetime expected credit losses | – POCI | Loans and advances to customers at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 0 | 0 |
| IFRS 9 | Strong | Financial assets at amortised cost, category | Lifetime expected credit losses | – POCI | Loans and advances to banks at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 0 | 0 |
| IFRS 9 | Strong | Financial assets at amortised cost, category | Lifetime expected credit losses | – POCI | Other | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 0 | 0 |
| IFRS 9 | Strong | Financial assets measured at fair value through other comprehensive income, category | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 320,161 | 367,685 |
| IFRS 9 | Strong | Financial assets measured at fair value through other comprehensive income, category | Debt securities | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 320,161 | 367,685 |
| IFRS 9 | Strong | Financial assets measured at fair value through other comprehensive income, category | – stage 1 | Non-credit impaired | Debt securities | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 319,557 | 367,542 |
| IFRS 9 | Strong | Financial assets measured at fair value through other comprehensive income, category | Lifetime expected credit losses | Non-credit impaired | Debt securities | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 604 | 143 |
| IFRS 9 | Strong | Financial assets measured at fair value through other comprehensive income, category | Lifetime expected credit losses | Credit impaired | Debt securities | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 0 | 0 |
| IFRS 9 | Strong | Financial assets measured at fair value through other comprehensive income, category | Lifetime expected credit losses | – POCI | Debt securities | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 0 | 0 |
| IFRS 9 | Good | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 141,199 | 162,533 |
| Financial assets and off-balance sheet loan commitments | 447,210 | 463,117 |
| IFRS 9 | Good | Loans and other credit-related commitments | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 136,297 | 157,339 |
| IFRS 9 | Good | Financial guarantees | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 4,902 | 5,194 |
| IFRS 9 | Good | – stage 1 | Non-credit impaired | Loans and other credit-related commitments | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 129,455 | 143,600 |
| IFRS 9 | Good | – stage 1 | Non-credit impaired | Financial guarantees | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 4,469 | 4,431 |
| IFRS 9 | Good | Lifetime expected credit losses | Non-credit impaired | Loans and other credit-related commitments | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 6,842 | 13,739 |
| IFRS 9 | Good | Lifetime expected credit losses | Non-credit impaired | Financial guarantees | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 433 | 763 |
| IFRS 9 | Good | Lifetime expected credit losses | Credit impaired | Loans and other credit-related commitments | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 0 | 0 |
| IFRS 9 | Good | Lifetime expected credit losses | Credit impaired | Financial guarantees | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 0 | 0 |
| IFRS 9 | Good | Lifetime expected credit losses | – POCI | Loans and other credit-related commitments | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 0 | 0 |
| IFRS 9 | Good | Lifetime expected credit losses | – POCI | Financial guarantees | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 0 | 0 |
| IFRS 9 | Good | Financial assets at amortised cost, category | Loans and advances to customers at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 230,326 | 233,320 |
| IFRS 9 | Good | Financial assets at amortised cost, category | Loans and advances to banks at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 4,037 | 5,496 |
| IFRS 9 | Good | Financial assets at amortised cost, category | Other | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 71,648 | 61,768 |
| IFRS 9 | Good | Financial assets at amortised cost, category | – stage 1 | Non-credit impaired | Loans and advances to customers at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 206,645 | 199,138 |
| IFRS 9 | Good | Financial assets at amortised cost, category | – stage 1 | Non-credit impaired | Loans and advances to banks at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 3,935 | 5,098 |
| IFRS 9 | Good | Financial assets at amortised cost, category | – stage 1 | Non-credit impaired | Other | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 70,508 | 61,218 |
| IFRS 9 | Good | Financial assets at amortised cost, category | Lifetime expected credit losses | Non-credit impaired | Loans and advances to customers at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 23,681 | 34,182 |
| IFRS 9 | Good | Financial assets at amortised cost, category | Lifetime expected credit losses | Non-credit impaired | Loans and advances to banks at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 102 | 398 |
| IFRS 9 | Good | Financial assets at amortised cost, category | Lifetime expected credit losses | Non-credit impaired | Other | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 1,140 | 550 |
| IFRS 9 | Good | Financial assets at amortised cost, category | Lifetime expected credit losses | Credit impaired | Loans and advances to customers at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 0 | 0 |
| IFRS 9 | Good | Financial assets at amortised cost, category | Lifetime expected credit losses | Credit impaired | Loans and advances to banks at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 0 | 0 |
| IFRS 9 | Good | Financial assets at amortised cost, category | Lifetime expected credit losses | Credit impaired | Other | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 0 | 0 |
| IFRS 9 | Good | Financial assets at amortised cost, category | Lifetime expected credit losses | – POCI | Loans and advances to customers at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 0 | 0 |
| IFRS 9 | Good | Financial assets at amortised cost, category | Lifetime expected credit losses | – POCI | Loans and advances to banks at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 0 | 0 |
| IFRS 9 | Good | Financial assets at amortised cost, category | Lifetime expected credit losses | – POCI | Other | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 0 | 0 |
| IFRS 9 | Good | Financial assets measured at fair value through other comprehensive income, category | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 12,298 | 12,678 |
| IFRS 9 | Good | Financial assets measured at fair value through other comprehensive income, category | Debt securities | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 12,298 | 12,678 |
| IFRS 9 | Good | Financial assets measured at fair value through other comprehensive income, category | – stage 1 | Non-credit impaired | Debt securities | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 12,196 | 12,585 |
| IFRS 9 | Good | Financial assets measured at fair value through other comprehensive income, category | Lifetime expected credit losses | Non-credit impaired | Debt securities | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 102 | 93 |
| IFRS 9 | Good | Financial assets measured at fair value through other comprehensive income, category | Lifetime expected credit losses | Credit impaired | Debt securities | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 0 | 0 |
| IFRS 9 | Good | Financial assets measured at fair value through other comprehensive income, category | Lifetime expected credit losses | – POCI | Debt securities | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 0 | 0 |
| IFRS 9 | Satisfactory | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 97,724 | 96,101 |
| Financial assets and off-balance sheet loan commitments | 369,625 | 382,834 |
| IFRS 9 | Satisfactory | Loans and other credit-related commitments | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 92,558 | 90,784 |
| IFRS 9 | Satisfactory | Financial guarantees | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 5,166 | 5,317 |
| IFRS 9 | Satisfactory | – stage 1 | Non-credit impaired | Loans and other credit-related commitments | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 76,043 | 63,592 |
| IFRS 9 | Satisfactory | – stage 1 | Non-credit impaired | Financial guarantees | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 3,929 | 3,163 |
| IFRS 9 | Satisfactory | Lifetime expected credit losses | Non-credit impaired | Loans and other credit-related commitments | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 16,515 | 27,192 |
| IFRS 9 | Satisfactory | Lifetime expected credit losses | Non-credit impaired | Financial guarantees | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 1,237 | 2,154 |
| IFRS 9 | Satisfactory | Lifetime expected credit losses | Credit impaired | Loans and other credit-related commitments | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 0 | 0 |
| IFRS 9 | Satisfactory | Lifetime expected credit losses | Credit impaired | Financial guarantees | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 0 | 0 |
| IFRS 9 | Satisfactory | Lifetime expected credit losses | – POCI | Loans and other credit-related commitments | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 0 | 0 |
| IFRS 9 | Satisfactory | Lifetime expected credit losses | – POCI | Financial guarantees | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 0 | 0 |
| IFRS 9 | Satisfactory | Financial assets at amortised cost, category | Loans and advances to customers at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 233,739 | 256,584 |
| IFRS 9 | Satisfactory | Financial assets at amortised cost, category | Loans and advances to banks at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 5,020 | 3,568 |
| IFRS 9 | Satisfactory | Financial assets at amortised cost, category | Other | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 33,142 | 26,581 |
| IFRS 9 | Satisfactory | Financial assets at amortised cost, category | – stage 1 | Non-credit impaired | Loans and advances to customers at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 169,809 | 165,507 |
| IFRS 9 | Satisfactory | Financial assets at amortised cost, category | – stage 1 | Non-credit impaired | Loans and advances to banks at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 4,788 | 3,357 |
| IFRS 9 | Satisfactory | Financial assets at amortised cost, category | – stage 1 | Non-credit impaired | Other | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 30,997 | 24,532 |
| IFRS 9 | Satisfactory | Financial assets at amortised cost, category | Lifetime expected credit losses | Non-credit impaired | Loans and advances to customers at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 63,930 | 91,077 |
| IFRS 9 | Satisfactory | Financial assets at amortised cost, category | Lifetime expected credit losses | Non-credit impaired | Loans and advances to banks at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 232 | 211 |
| IFRS 9 | Satisfactory | Financial assets at amortised cost, category | Lifetime expected credit losses | Non-credit impaired | Other | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 2,145 | 2,049 |
| IFRS 9 | Satisfactory | Financial assets at amortised cost, category | Lifetime expected credit losses | Credit impaired | Loans and advances to customers at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 0 | 0 |
| IFRS 9 | Satisfactory | Financial assets at amortised cost, category | Lifetime expected credit losses | Credit impaired | Loans and advances to banks at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 0 | 0 |
| IFRS 9 | Satisfactory | Financial assets at amortised cost, category | Lifetime expected credit losses | Credit impaired | Other | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 0 | 0 |
| IFRS 9 | Satisfactory | Financial assets at amortised cost, category | Lifetime expected credit losses | – POCI | Loans and advances to customers at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 0 | 0 |
| IFRS 9 | Satisfactory | Financial assets at amortised cost, category | Lifetime expected credit losses | – POCI | Loans and advances to banks at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 0 | 0 |
| IFRS 9 | Satisfactory | Financial assets at amortised cost, category | Lifetime expected credit losses | – POCI | Other | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 0 | 0 |
| IFRS 9 | Satisfactory | Financial assets measured at fair value through other comprehensive income, category | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 11,677 | 10,409 |
| IFRS 9 | Satisfactory | Financial assets measured at fair value through other comprehensive income, category | Debt securities | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 11,677 | 10,409 |
| IFRS 9 | Satisfactory | Financial assets measured at fair value through other comprehensive income, category | – stage 1 | Non-credit impaired | Debt securities | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 11,354 | 10,066 |
| IFRS 9 | Satisfactory | Financial assets measured at fair value through other comprehensive income, category | Lifetime expected credit losses | Non-credit impaired | Debt securities | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 323 | 343 |
| IFRS 9 | Satisfactory | Financial assets measured at fair value through other comprehensive income, category | Lifetime expected credit losses | Credit impaired | Debt securities | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 0 | 0 |
| IFRS 9 | Satisfactory | Financial assets measured at fair value through other comprehensive income, category | Lifetime expected credit losses | – POCI | Debt securities | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 0 | 0 |
| IFRS 9 | Sub- standard | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 9,133 | 10,915 |
| Financial assets and off-balance sheet loan commitments | 40,843 | 49,772 |
| IFRS 9 | Sub- standard | Loans and other credit-related commitments | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 8,142 | 9,668 |
| IFRS 9 | Sub- standard | Financial guarantees | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 991 | 1,247 |
| IFRS 9 | Sub- standard | – stage 1 | Non-credit impaired | Loans and other credit-related commitments | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 1,541 | 1,265 |
| IFRS 9 | Sub- standard | – stage 1 | Non-credit impaired | Financial guarantees | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 183 | 210 |
| IFRS 9 | Sub- standard | Lifetime expected credit losses | Non-credit impaired | Loans and other credit-related commitments | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 6,601 | 8,403 |
| IFRS 9 | Sub- standard | Lifetime expected credit losses | Non-credit impaired | Financial guarantees | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 808 | 1,037 |
| IFRS 9 | Sub- standard | Lifetime expected credit losses | Credit impaired | Loans and other credit-related commitments | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 0 | 0 |
| IFRS 9 | Sub- standard | Lifetime expected credit losses | Credit impaired | Financial guarantees | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 0 | 0 |
| IFRS 9 | Sub- standard | Lifetime expected credit losses | – POCI | Loans and other credit-related commitments | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 0 | 0 |
| IFRS 9 | Sub- standard | Lifetime expected credit losses | – POCI | Financial guarantees | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 0 | 0 |
| IFRS 9 | Sub- standard | Financial assets at amortised cost, category | Loans and advances to customers at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 29,404 | 36,970 |
| IFRS 9 | Sub- standard | Financial assets at amortised cost, category | Loans and advances to banks at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 1,118 | 1,276 |
| IFRS 9 | Sub- standard | Financial assets at amortised cost, category | Other | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 1,188 | 611 |
| IFRS 9 | Sub- standard | Financial assets at amortised cost, category | – stage 1 | Non-credit impaired | Loans and advances to customers at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 4,840 | 5,439 |
| IFRS 9 | Sub- standard | Financial assets at amortised cost, category | – stage 1 | Non-credit impaired | Loans and advances to banks at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 10 | 73 |
| IFRS 9 | Sub- standard | Financial assets at amortised cost, category | – stage 1 | Non-credit impaired | Other | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 84 | 54 |
| IFRS 9 | Sub- standard | Financial assets at amortised cost, category | Lifetime expected credit losses | Non-credit impaired | Loans and advances to customers at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 24,560 | 31,531 |
| IFRS 9 | Sub- standard | Financial assets at amortised cost, category | Lifetime expected credit losses | Non-credit impaired | Loans and advances to banks at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 1,108 | 1,203 |
| IFRS 9 | Sub- standard | Financial assets at amortised cost, category | Lifetime expected credit losses | Non-credit impaired | Other | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 1,104 | 557 |
| IFRS 9 | Sub- standard | Financial assets at amortised cost, category | Lifetime expected credit losses | Credit impaired | Loans and advances to customers at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 0 | 0 |
| IFRS 9 | Sub- standard | Financial assets at amortised cost, category | Lifetime expected credit losses | Credit impaired | Loans and advances to banks at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 0 | 0 |
| IFRS 9 | Sub- standard | Financial assets at amortised cost, category | Lifetime expected credit losses | Credit impaired | Other | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 0 | 0 |
| IFRS 9 | Sub- standard | Financial assets at amortised cost, category | Lifetime expected credit losses | – POCI | Loans and advances to customers at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 4 | 0 |
| IFRS 9 | Sub- standard | Financial assets at amortised cost, category | Lifetime expected credit losses | – POCI | Loans and advances to banks at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 0 | 0 |
| IFRS 9 | Sub- standard | Financial assets at amortised cost, category | Lifetime expected credit losses | – POCI | Other | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 0 | 0 |
| IFRS 9 | Sub- standard | Financial assets measured at fair value through other comprehensive income, category | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 1,087 | 825 |
| IFRS 9 | Sub- standard | Financial assets measured at fair value through other comprehensive income, category | Debt securities | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 1,087 | 825 |
| IFRS 9 | Sub- standard | Financial assets measured at fair value through other comprehensive income, category | – stage 1 | Non-credit impaired | Debt securities | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 0 | 0 |
| IFRS 9 | Sub- standard | Financial assets measured at fair value through other comprehensive income, category | Lifetime expected credit losses | Non-credit impaired | Debt securities | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 1,087 | 825 |
| IFRS 9 | Sub- standard | Financial assets measured at fair value through other comprehensive income, category | Lifetime expected credit losses | Credit impaired | Debt securities | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 0 | 0 |
| IFRS 9 | Sub- standard | Financial assets measured at fair value through other comprehensive income, category | Lifetime expected credit losses | – POCI | Debt securities | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 0 | 0 |
| IFRS 9 | Credit impaired | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets and off-balance sheet loan commitments | 20,414 | 20,940 |
| IFRS 9 | Credit impaired | Loans and other credit-related commitments | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 775 | 1,081 |
| IFRS 9 | Credit impaired | Financial guarantees | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 225 | 270 |
| IFRS 9 | Credit impaired | – stage 1 | Non-credit impaired | Loans and other credit-related commitments | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 0 | 0 |
| IFRS 9 | Credit impaired | – stage 1 | Non-credit impaired | Financial guarantees | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 0 | 0 |
| IFRS 9 | Credit impaired | Lifetime expected credit losses | Non-credit impaired | Loans and other credit-related commitments | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 0 | 0 |
| IFRS 9 | Credit impaired | Lifetime expected credit losses | Non-credit impaired | Financial guarantees | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 0 | 0 |
| IFRS 9 | Credit impaired | Lifetime expected credit losses | Credit impaired | Loans and other credit-related commitments | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 775 | 1,080 |
| IFRS 9 | Credit impaired | Lifetime expected credit losses | Credit impaired | Financial guarantees | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 225 | 269 |
| IFRS 9 | Credit impaired | Lifetime expected credit losses | – POCI | Loans and other credit-related commitments | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 0 | 1 |
| IFRS 9 | Credit impaired | Lifetime expected credit losses | – POCI | Financial guarantees | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Off-balance sheet commitments | 0 | 1 |
| IFRS 9 | Credit impaired | Financial assets at amortised cost, category | Loans and advances to customers at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 19,067 | 19,372 |
| IFRS 9 | Credit impaired | Financial assets at amortised cost, category | Loans and advances to banks at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 0 | 0 |
| IFRS 9 | Credit impaired | Financial assets at amortised cost, category | Other | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 347 | 217 |
| IFRS 9 | Credit impaired | Financial assets at amortised cost, category | – stage 1 | Non-credit impaired | Loans and advances to customers at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 0 | 0 |
| IFRS 9 | Credit impaired | Financial assets at amortised cost, category | – stage 1 | Non-credit impaired | Loans and advances to banks at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 0 | 0 |
| IFRS 9 | Credit impaired | Financial assets at amortised cost, category | – stage 1 | Non-credit impaired | Other | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 0 | 0 |
| IFRS 9 | Credit impaired | Financial assets at amortised cost, category | Lifetime expected credit losses | Non-credit impaired | Loans and advances to customers at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 0 | 0 |
| IFRS 9 | Credit impaired | Financial assets at amortised cost, category | Lifetime expected credit losses | Non-credit impaired | Loans and advances to banks at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 0 | 0 |
| IFRS 9 | Credit impaired | Financial assets at amortised cost, category | Lifetime expected credit losses | Non-credit impaired | Other | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 0 | 0 |
| IFRS 9 | Credit impaired | Financial assets at amortised cost, category | Lifetime expected credit losses | Credit impaired | Loans and advances to customers at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 18,797 | 19,095 |
| IFRS 9 | Credit impaired | Financial assets at amortised cost, category | Lifetime expected credit losses | Credit impaired | Loans and advances to banks at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 0 | 0 |
| IFRS 9 | Credit impaired | Financial assets at amortised cost, category | Lifetime expected credit losses | Credit impaired | Other | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 304 | 177 |
| IFRS 9 | Credit impaired | Financial assets at amortised cost, category | Lifetime expected credit losses | – POCI | Loans and advances to customers at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 270 | 277 |
| IFRS 9 | Credit impaired | Financial assets at amortised cost, category | Lifetime expected credit losses | – POCI | Loans and advances to banks at amortised cost | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 0 | 0 |
| IFRS 9 | Credit impaired | Financial assets at amortised cost, category | Lifetime expected credit losses | – POCI | Other | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 43 | 40 |
| IFRS 9 | Credit impaired | Financial assets measured at fair value through other comprehensive income, category | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 46 | 306 |
| IFRS 9 | Credit impaired | Financial assets measured at fair value through other comprehensive income, category | – stage 1 | Non-credit impaired | Debt securities | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 0 | 0 |
| IFRS 9 | Credit impaired | Financial assets measured at fair value through other comprehensive income, category | Lifetime expected credit losses | Non-credit impaired | Debt securities | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 0 | 0 |
| IFRS 9 | Credit impaired | Financial assets measured at fair value through other comprehensive income, category | Lifetime expected credit losses | Credit impaired | Debt securities | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | 0 | 257 |
| IFRS 9 | Credit impaired | Financial assets measured at fair value through other comprehensive income, category | Lifetime expected credit losses | – POCI | Debt securities | Gross carrying/nominal amount | | |
| Disclosure of financial assets that are either past due or impaired [line items] | | |
| Financial assets | $ 46 | $ 49 |
