v3.25.2
Report of directors financial review risk report - Summary of credit risk (excluding debt instruments measured at FVOCI) by stage distribution and ECL coverage by industry sector (Details) - GBP (£)
£ in Millions
Jun. 30, 2025
Dec. 31, 2024
Loans and advances to customers at amortised cost    
Disclosure of credit risk exposure [line items]    
Financial assets £ 78,881 £ 82,666
Loans and advances to banks at amortised cost    
Disclosure of credit risk exposure [line items]    
Financial assets £ 15,803 £ 14,521
Financial assets at amortised cost    
Disclosure of credit risk exposure [line items]    
ECL coverage % 0.10% 0.20%
Financial assets at amortised cost | Gross carrying/ nominal amount    
Disclosure of credit risk exposure [line items]    
Financial assets £ 487,895 £ 460,163
Financial assets at amortised cost | Allowance for ECL    
Disclosure of credit risk exposure [line items]    
Financial assets £ (729) £ (925)
Financial assets at amortised cost | 12-month expected credit losses | Non-credit impaired    
Disclosure of credit risk exposure [line items]    
ECL coverage % 0.00% 0.00%
Financial assets at amortised cost | 12-month expected credit losses | Non-credit impaired | Gross carrying/ nominal amount    
Disclosure of credit risk exposure [line items]    
Financial assets £ 477,851 £ 447,226
Financial assets at amortised cost | 12-month expected credit losses | Non-credit impaired | Allowance for ECL    
Disclosure of credit risk exposure [line items]    
Financial assets £ (90) £ (78)
Financial assets at amortised cost | Lifetime expected credit losses | Non-credit impaired    
Disclosure of credit risk exposure [line items]    
ECL coverage % 1.50% 1.30%
Financial assets at amortised cost | Lifetime expected credit losses | Non-credit impaired | – personal    
Disclosure of credit risk exposure [line items]    
ECL coverage % 1.80% 2.00%
Financial assets at amortised cost | Lifetime expected credit losses | Non-credit impaired | – corporate and commercial    
Disclosure of credit risk exposure [line items]    
ECL coverage % 2.30% 1.90%
Financial assets at amortised cost | Lifetime expected credit losses | Non-credit impaired | – non-bank financial institutions    
Disclosure of credit risk exposure [line items]    
ECL coverage % 0.90% 1.40%
Financial assets at amortised cost | Lifetime expected credit losses | Non-credit impaired | Gross carrying/ nominal amount    
Disclosure of credit risk exposure [line items]    
Financial assets £ 8,082 £ 10,553
Financial assets at amortised cost | Lifetime expected credit losses | Non-credit impaired | Gross carrying/ nominal amount | – personal    
Disclosure of credit risk exposure [line items]    
Financial assets 766 955
Financial assets at amortised cost | Lifetime expected credit losses | Non-credit impaired | Gross carrying/ nominal amount | – corporate and commercial    
Disclosure of credit risk exposure [line items]    
Financial assets 3,703 4,375
Financial assets at amortised cost | Lifetime expected credit losses | Non-credit impaired | Gross carrying/ nominal amount | – non-bank financial institutions    
Disclosure of credit risk exposure [line items]    
Financial assets 582 216
Financial assets at amortised cost | Lifetime expected credit losses | Non-credit impaired | Allowance for ECL    
Disclosure of credit risk exposure [line items]    
Financial assets (120) (133)
Financial assets at amortised cost | Lifetime expected credit losses | Non-credit impaired | Allowance for ECL | – personal    
Disclosure of credit risk exposure [line items]    
Financial assets (14) (19)
Financial assets at amortised cost | Lifetime expected credit losses | Non-credit impaired | Allowance for ECL | – corporate and commercial    
Disclosure of credit risk exposure [line items]    
Financial assets (84) (85)
Financial assets at amortised cost | Lifetime expected credit losses | Non-credit impaired | Allowance for ECL | – non-bank financial institutions    
Disclosure of credit risk exposure [line items]    
Financial assets £ (5) £ (3)
Financial assets at amortised cost | Lifetime expected credit losses | Credit impaired    
Disclosure of credit risk exposure [line items]    
ECL coverage % 26.10% 29.70%
Financial assets at amortised cost | Lifetime expected credit losses | Credit impaired | Gross carrying/ nominal amount    
Disclosure of credit risk exposure [line items]    
Financial assets £ 1,920 £ 2,343
Financial assets at amortised cost | Lifetime expected credit losses | Credit impaired | Allowance for ECL    
Disclosure of credit risk exposure [line items]    
Financial assets £ (501) £ (696)
Financial assets at amortised cost | Lifetime expected credit losses | POCI    
Disclosure of credit risk exposure [line items]    
ECL coverage % 42.90% 43.90%
Financial assets at amortised cost | Lifetime expected credit losses | POCI | Gross carrying/ nominal amount    
Disclosure of credit risk exposure [line items]    
Financial assets £ 42 £ 41
Financial assets at amortised cost | Lifetime expected credit losses | POCI | Allowance for ECL    
Disclosure of credit risk exposure [line items]    
Financial assets £ (18) £ (18)
Financial assets at amortised cost | Loans and advances to customers at amortised cost    
Disclosure of credit risk exposure [line items]    
ECL coverage % 0.80% 1.00%
Financial assets at amortised cost | Loans and advances to customers at amortised cost | – personal    
Disclosure of credit risk exposure [line items]    
ECL coverage % 0.80% 0.60%
Financial assets at amortised cost | Loans and advances to customers at amortised cost | – corporate and commercial    
Disclosure of credit risk exposure [line items]    
ECL coverage % 1.10% 1.20%
Financial assets at amortised cost | Loans and advances to customers at amortised cost | – non-bank financial institutions    
Disclosure of credit risk exposure [line items]    
ECL coverage % 0.20% 1.00%
Financial assets at amortised cost | Loans and advances to customers at amortised cost | Gross carrying/ nominal amount    
Disclosure of credit risk exposure [line items]    
Financial assets £ 79,551 £ 83,524
Financial assets at amortised cost | Loans and advances to customers at amortised cost | Gross carrying/ nominal amount | – personal    
Disclosure of credit risk exposure [line items]    
Financial assets 14,462 19,947
Financial assets at amortised cost | Loans and advances to customers at amortised cost | Gross carrying/ nominal amount | – corporate and commercial    
Disclosure of credit risk exposure [line items]    
Financial assets 46,846 47,427
Financial assets at amortised cost | Loans and advances to customers at amortised cost | Gross carrying/ nominal amount | – non-bank financial institutions    
Disclosure of credit risk exposure [line items]    
Financial assets 18,243 16,150
Financial assets at amortised cost | Loans and advances to customers at amortised cost | Allowance for ECL    
Disclosure of credit risk exposure [line items]    
Financial assets (670) (858)
Financial assets at amortised cost | Loans and advances to customers at amortised cost | Allowance for ECL | – personal    
Disclosure of credit risk exposure [line items]    
Financial assets (113) (112)
Financial assets at amortised cost | Loans and advances to customers at amortised cost | Allowance for ECL | – corporate and commercial    
Disclosure of credit risk exposure [line items]    
Financial assets (518) (592)
Financial assets at amortised cost | Loans and advances to customers at amortised cost | Allowance for ECL | – non-bank financial institutions    
Disclosure of credit risk exposure [line items]    
Financial assets £ (39) £ (154)
Financial assets at amortised cost | Loans and advances to customers at amortised cost | 12-month expected credit losses | Non-credit impaired    
Disclosure of credit risk exposure [line items]    
ECL coverage % 0.10% 0.10%
Financial assets at amortised cost | Loans and advances to customers at amortised cost | 12-month expected credit losses | Non-credit impaired | – personal    
Disclosure of credit risk exposure [line items]    
ECL coverage % 0.10% 0.10%
Financial assets at amortised cost | Loans and advances to customers at amortised cost | 12-month expected credit losses | Non-credit impaired | – corporate and commercial    
Disclosure of credit risk exposure [line items]    
ECL coverage % 0.10% 0.10%
Financial assets at amortised cost | Loans and advances to customers at amortised cost | 12-month expected credit losses | Non-credit impaired | – non-bank financial institutions    
Disclosure of credit risk exposure [line items]    
ECL coverage % 0.10% 0.00%
Financial assets at amortised cost | Loans and advances to customers at amortised cost | 12-month expected credit losses | Non-credit impaired | Gross carrying/ nominal amount    
Disclosure of credit risk exposure [line items]    
Financial assets £ 72,761 £ 75,844
Financial assets at amortised cost | Loans and advances to customers at amortised cost | 12-month expected credit losses | Non-credit impaired | Gross carrying/ nominal amount | – personal    
Disclosure of credit risk exposure [line items]    
Financial assets 13,401 18,733
Financial assets at amortised cost | Loans and advances to customers at amortised cost | 12-month expected credit losses | Non-credit impaired | Gross carrying/ nominal amount | – corporate and commercial    
Disclosure of credit risk exposure [line items]    
Financial assets 41,803 41,386
Financial assets at amortised cost | Loans and advances to customers at amortised cost | 12-month expected credit losses | Non-credit impaired | Gross carrying/ nominal amount | – non-bank financial institutions    
Disclosure of credit risk exposure [line items]    
Financial assets 17,557 15,725
Financial assets at amortised cost | Loans and advances to customers at amortised cost | 12-month expected credit losses | Non-credit impaired | Allowance for ECL    
Disclosure of credit risk exposure [line items]    
Financial assets (68) (56)
Financial assets at amortised cost | Loans and advances to customers at amortised cost | 12-month expected credit losses | Non-credit impaired | Allowance for ECL | – personal    
Disclosure of credit risk exposure [line items]    
Financial assets (13) (14)
Financial assets at amortised cost | Loans and advances to customers at amortised cost | 12-month expected credit losses | Non-credit impaired | Allowance for ECL | – corporate and commercial    
Disclosure of credit risk exposure [line items]    
Financial assets (44) (35)
Financial assets at amortised cost | Loans and advances to customers at amortised cost | 12-month expected credit losses | Non-credit impaired | Allowance for ECL | – non-bank financial institutions    
Disclosure of credit risk exposure [line items]    
Financial assets £ (11) £ (7)
Financial assets at amortised cost | Loans and advances to customers at amortised cost | Lifetime expected credit losses | Non-credit impaired    
Disclosure of credit risk exposure [line items]    
ECL coverage % 2.00% 1.90%
Financial assets at amortised cost | Loans and advances to customers at amortised cost | Lifetime expected credit losses | Non-credit impaired | – personal    
Disclosure of credit risk exposure [line items]    
ECL coverage % 1.80% 2.00%
Financial assets at amortised cost | Loans and advances to customers at amortised cost | Lifetime expected credit losses | Non-credit impaired | – corporate and commercial    
Disclosure of credit risk exposure [line items]    
ECL coverage % 2.30% 1.90%
Financial assets at amortised cost | Loans and advances to customers at amortised cost | Lifetime expected credit losses | Non-credit impaired | – non-bank financial institutions    
Disclosure of credit risk exposure [line items]    
ECL coverage % 0.90% 1.40%
Financial assets at amortised cost | Loans and advances to customers at amortised cost | Lifetime expected credit losses | Non-credit impaired | Gross carrying/ nominal amount    
Disclosure of credit risk exposure [line items]    
Financial assets £ 5,051 £ 5,546
Financial assets at amortised cost | Loans and advances to customers at amortised cost | Lifetime expected credit losses | Non-credit impaired | Gross carrying/ nominal amount | – personal    
Disclosure of credit risk exposure [line items]    
Financial assets 766 955
Financial assets at amortised cost | Loans and advances to customers at amortised cost | Lifetime expected credit losses | Non-credit impaired | Gross carrying/ nominal amount | – corporate and commercial    
Disclosure of credit risk exposure [line items]    
Financial assets 3,703 4,375
Financial assets at amortised cost | Loans and advances to customers at amortised cost | Lifetime expected credit losses | Non-credit impaired | Gross carrying/ nominal amount | – non-bank financial institutions    
Disclosure of credit risk exposure [line items]    
Financial assets 582 216
Financial assets at amortised cost | Loans and advances to customers at amortised cost | Lifetime expected credit losses | Non-credit impaired | Allowance for ECL    
Disclosure of credit risk exposure [line items]    
Financial assets (103) (107)
Financial assets at amortised cost | Loans and advances to customers at amortised cost | Lifetime expected credit losses | Non-credit impaired | Allowance for ECL | – personal    
Disclosure of credit risk exposure [line items]    
Financial assets (14) (19)
Financial assets at amortised cost | Loans and advances to customers at amortised cost | Lifetime expected credit losses | Non-credit impaired | Allowance for ECL | – corporate and commercial    
Disclosure of credit risk exposure [line items]    
Financial assets (84) (85)
Financial assets at amortised cost | Loans and advances to customers at amortised cost | Lifetime expected credit losses | Non-credit impaired | Allowance for ECL | – non-bank financial institutions    
Disclosure of credit risk exposure [line items]    
Financial assets £ (5) £ (3)
Financial assets at amortised cost | Loans and advances to customers at amortised cost | Lifetime expected credit losses | Credit impaired    
Disclosure of credit risk exposure [line items]    
ECL coverage % 28.30% 32.30%
Financial assets at amortised cost | Loans and advances to customers at amortised cost | Lifetime expected credit losses | Credit impaired | – personal    
Disclosure of credit risk exposure [line items]    
ECL coverage % 29.20% 30.50%
Financial assets at amortised cost | Loans and advances to customers at amortised cost | Lifetime expected credit losses | Credit impaired | – corporate and commercial    
Disclosure of credit risk exposure [line items]    
ECL coverage % 28.60% 27.90%
Financial assets at amortised cost | Loans and advances to customers at amortised cost | Lifetime expected credit losses | Credit impaired | – non-bank financial institutions    
Disclosure of credit risk exposure [line items]    
ECL coverage % 22.10% 68.90%
Financial assets at amortised cost | Loans and advances to customers at amortised cost | Lifetime expected credit losses | Credit impaired | Gross carrying/ nominal amount    
Disclosure of credit risk exposure [line items]    
Financial assets £ 1,700 £ 2,096
Financial assets at amortised cost | Loans and advances to customers at amortised cost | Lifetime expected credit losses | Credit impaired | Gross carrying/ nominal amount | – personal    
Disclosure of credit risk exposure [line items]    
Financial assets 295 259
Financial assets at amortised cost | Loans and advances to customers at amortised cost | Lifetime expected credit losses | Credit impaired | Gross carrying/ nominal amount | – corporate and commercial    
Disclosure of credit risk exposure [line items]    
Financial assets 1,301 1,628
Financial assets at amortised cost | Loans and advances to customers at amortised cost | Lifetime expected credit losses | Credit impaired | Gross carrying/ nominal amount | – non-bank financial institutions    
Disclosure of credit risk exposure [line items]    
Financial assets 104 209
Financial assets at amortised cost | Loans and advances to customers at amortised cost | Lifetime expected credit losses | Credit impaired | Allowance for ECL    
Disclosure of credit risk exposure [line items]    
Financial assets (481) (677)
Financial assets at amortised cost | Loans and advances to customers at amortised cost | Lifetime expected credit losses | Credit impaired | Allowance for ECL | – personal    
Disclosure of credit risk exposure [line items]    
Financial assets (86) (79)
Financial assets at amortised cost | Loans and advances to customers at amortised cost | Lifetime expected credit losses | Credit impaired | Allowance for ECL | – corporate and commercial    
Disclosure of credit risk exposure [line items]    
Financial assets (372) (454)
Financial assets at amortised cost | Loans and advances to customers at amortised cost | Lifetime expected credit losses | Credit impaired | Allowance for ECL | – non-bank financial institutions    
Disclosure of credit risk exposure [line items]    
Financial assets £ (23) £ (144)
Financial assets at amortised cost | Loans and advances to customers at amortised cost | Lifetime expected credit losses | POCI    
Disclosure of credit risk exposure [line items]    
ECL coverage % 46.20% 47.40%
Financial assets at amortised cost | Loans and advances to customers at amortised cost | Lifetime expected credit losses | POCI | – personal    
Disclosure of credit risk exposure [line items]    
ECL coverage % 0.00% 0.00%
Financial assets at amortised cost | Loans and advances to customers at amortised cost | Lifetime expected credit losses | POCI | – corporate and commercial    
Disclosure of credit risk exposure [line items]    
ECL coverage % 46.20% 47.40%
Financial assets at amortised cost | Loans and advances to customers at amortised cost | Lifetime expected credit losses | POCI | – non-bank financial institutions    
Disclosure of credit risk exposure [line items]    
ECL coverage % 0.00% 0.00%
Financial assets at amortised cost | Loans and advances to customers at amortised cost | Lifetime expected credit losses | POCI | Gross carrying/ nominal amount    
Disclosure of credit risk exposure [line items]    
Financial assets £ 39 £ 38
Financial assets at amortised cost | Loans and advances to customers at amortised cost | Lifetime expected credit losses | POCI | Gross carrying/ nominal amount | – personal    
Disclosure of credit risk exposure [line items]    
Financial assets 0 0
Financial assets at amortised cost | Loans and advances to customers at amortised cost | Lifetime expected credit losses | POCI | Gross carrying/ nominal amount | – corporate and commercial    
Disclosure of credit risk exposure [line items]    
Financial assets 39 38
Financial assets at amortised cost | Loans and advances to customers at amortised cost | Lifetime expected credit losses | POCI | Gross carrying/ nominal amount | – non-bank financial institutions    
Disclosure of credit risk exposure [line items]    
Financial assets 0 0
Financial assets at amortised cost | Loans and advances to customers at amortised cost | Lifetime expected credit losses | POCI | Allowance for ECL    
Disclosure of credit risk exposure [line items]    
Financial assets (18) (18)
Financial assets at amortised cost | Loans and advances to customers at amortised cost | Lifetime expected credit losses | POCI | Allowance for ECL | – personal    
Disclosure of credit risk exposure [line items]    
Financial assets 0 0
Financial assets at amortised cost | Loans and advances to customers at amortised cost | Lifetime expected credit losses | POCI | Allowance for ECL | – corporate and commercial    
Disclosure of credit risk exposure [line items]    
Financial assets (18) (18)
Financial assets at amortised cost | Loans and advances to customers at amortised cost | Lifetime expected credit losses | POCI | Allowance for ECL | – non-bank financial institutions    
Disclosure of credit risk exposure [line items]    
Financial assets £ 0 £ 0
Financial assets at amortised cost | Loans and advances to banks at amortised cost    
Disclosure of credit risk exposure [line items]    
ECL coverage % 0.00% 0.00%
Financial assets at amortised cost | Loans and advances to banks at amortised cost | Gross carrying/ nominal amount    
Disclosure of credit risk exposure [line items]    
Financial assets £ 15,806 £ 14,524
Financial assets at amortised cost | Loans and advances to banks at amortised cost | Allowance for ECL    
Disclosure of credit risk exposure [line items]    
Financial assets £ (3) £ (3)
Financial assets at amortised cost | Loans and advances to banks at amortised cost | 12-month expected credit losses | Non-credit impaired    
Disclosure of credit risk exposure [line items]    
ECL coverage % 0.00% 0.00%
Financial assets at amortised cost | Loans and advances to banks at amortised cost | 12-month expected credit losses | Non-credit impaired | Gross carrying/ nominal amount    
Disclosure of credit risk exposure [line items]    
Financial assets £ 15,752 £ 14,457
Financial assets at amortised cost | Loans and advances to banks at amortised cost | 12-month expected credit losses | Non-credit impaired | Allowance for ECL    
Disclosure of credit risk exposure [line items]    
Financial assets £ (1) £ (2)
Financial assets at amortised cost | Loans and advances to banks at amortised cost | Lifetime expected credit losses | Non-credit impaired    
Disclosure of credit risk exposure [line items]    
ECL coverage % 1.90% 1.50%
Financial assets at amortised cost | Loans and advances to banks at amortised cost | Lifetime expected credit losses | Non-credit impaired | Gross carrying/ nominal amount    
Disclosure of credit risk exposure [line items]    
Financial assets £ 53 £ 67
Financial assets at amortised cost | Loans and advances to banks at amortised cost | Lifetime expected credit losses | Non-credit impaired | Allowance for ECL    
Disclosure of credit risk exposure [line items]    
Financial assets £ (1) £ (1)
Financial assets at amortised cost | Loans and advances to banks at amortised cost | Lifetime expected credit losses | Credit impaired    
Disclosure of credit risk exposure [line items]    
ECL coverage % 100.00% 0.00%
Financial assets at amortised cost | Loans and advances to banks at amortised cost | Lifetime expected credit losses | Credit impaired | Gross carrying/ nominal amount    
Disclosure of credit risk exposure [line items]    
Financial assets £ 1 £ 0
Financial assets at amortised cost | Loans and advances to banks at amortised cost | Lifetime expected credit losses | Credit impaired | Allowance for ECL    
Disclosure of credit risk exposure [line items]    
Financial assets £ (1) £ 0
Financial assets at amortised cost | Loans and advances to banks at amortised cost | Lifetime expected credit losses | POCI    
Disclosure of credit risk exposure [line items]    
ECL coverage % 0.00% 0.00%
Financial assets at amortised cost | Loans and advances to banks at amortised cost | Lifetime expected credit losses | POCI | Gross carrying/ nominal amount    
Disclosure of credit risk exposure [line items]    
Financial assets £ 0 £ 0
Financial assets at amortised cost | Loans and advances to banks at amortised cost | Lifetime expected credit losses | POCI | Allowance for ECL    
Disclosure of credit risk exposure [line items]    
Financial assets £ 0 £ 0
Financial assets at amortised cost | Other financial assets measured at amortised cost    
Disclosure of credit risk exposure [line items]    
ECL coverage % 0.00% 0.00%
Financial assets at amortised cost | Other financial assets measured at amortised cost | Gross carrying/ nominal amount    
Disclosure of credit risk exposure [line items]    
Financial assets £ 244,062 £ 237,475
Financial assets at amortised cost | Other financial assets measured at amortised cost | Allowance for ECL    
Disclosure of credit risk exposure [line items]    
Financial assets £ (6) £ (6)
Financial assets at amortised cost | Other financial assets measured at amortised cost | 12-month expected credit losses | Non-credit impaired    
Disclosure of credit risk exposure [line items]    
ECL coverage % 0.00% 0.00%
Financial assets at amortised cost | Other financial assets measured at amortised cost | 12-month expected credit losses | Non-credit impaired | Gross carrying/ nominal amount    
Disclosure of credit risk exposure [line items]    
Financial assets £ 243,979 £ 237,375
Financial assets at amortised cost | Other financial assets measured at amortised cost | 12-month expected credit losses | Non-credit impaired | Allowance for ECL    
Disclosure of credit risk exposure [line items]    
Financial assets £ (3) £ (4)
Financial assets at amortised cost | Other financial assets measured at amortised cost | Lifetime expected credit losses | Non-credit impaired    
Disclosure of credit risk exposure [line items]    
ECL coverage % 0.00% 0.00%
Financial assets at amortised cost | Other financial assets measured at amortised cost | Lifetime expected credit losses | Non-credit impaired | Gross carrying/ nominal amount    
Disclosure of credit risk exposure [line items]    
Financial assets £ 48 £ 59
Financial assets at amortised cost | Other financial assets measured at amortised cost | Lifetime expected credit losses | Non-credit impaired | Allowance for ECL    
Disclosure of credit risk exposure [line items]    
Financial assets £ 0 £ 0
Financial assets at amortised cost | Other financial assets measured at amortised cost | Lifetime expected credit losses | Credit impaired    
Disclosure of credit risk exposure [line items]    
ECL coverage % 8.60% 4.90%
Financial assets at amortised cost | Other financial assets measured at amortised cost | Lifetime expected credit losses | Credit impaired | Gross carrying/ nominal amount    
Disclosure of credit risk exposure [line items]    
Financial assets £ 35 £ 41
Financial assets at amortised cost | Other financial assets measured at amortised cost | Lifetime expected credit losses | Credit impaired | Allowance for ECL    
Disclosure of credit risk exposure [line items]    
Financial assets £ (3) £ (2)
Financial assets at amortised cost | Other financial assets measured at amortised cost | Lifetime expected credit losses | POCI    
Disclosure of credit risk exposure [line items]    
ECL coverage % 0.00% 0.00%
Financial assets at amortised cost | Other financial assets measured at amortised cost | Lifetime expected credit losses | POCI | Gross carrying/ nominal amount    
Disclosure of credit risk exposure [line items]    
Financial assets £ 0 £ 0
Financial assets at amortised cost | Other financial assets measured at amortised cost | Lifetime expected credit losses | POCI | Allowance for ECL    
Disclosure of credit risk exposure [line items]    
Financial assets £ 0 £ 0
Financial assets at amortised cost | Loans and other credit-related commitments    
Disclosure of credit risk exposure [line items]    
ECL coverage % 0.00% 0.00%
Financial assets at amortised cost | Loans and other credit-related commitments | – personal    
Disclosure of credit risk exposure [line items]    
ECL coverage % 0.00% 0.00%
Financial assets at amortised cost | Loans and other credit-related commitments | – corporate and commercial    
Disclosure of credit risk exposure [line items]    
ECL coverage % 0.10% 0.10%
Financial assets at amortised cost | Loans and other credit-related commitments | – financial    
Disclosure of credit risk exposure [line items]    
ECL coverage % 0.00% 0.00%
Financial assets at amortised cost | Loans and other credit-related commitments | Gross carrying/ nominal amount    
Disclosure of credit risk exposure [line items]    
Financial assets £ 145,621 £ 121,764
Financial assets at amortised cost | Loans and other credit-related commitments | Gross carrying/ nominal amount | – personal    
Disclosure of credit risk exposure [line items]    
Financial assets 1,079 1,155
Financial assets at amortised cost | Loans and other credit-related commitments | Gross carrying/ nominal amount | – corporate and commercial    
Disclosure of credit risk exposure [line items]    
Financial assets 62,814 62,205
Financial assets at amortised cost | Loans and other credit-related commitments | Gross carrying/ nominal amount | – financial    
Disclosure of credit risk exposure [line items]    
Financial assets 81,728 58,404
Financial assets at amortised cost | Loans and other credit-related commitments | Allowance for ECL    
Disclosure of credit risk exposure [line items]    
Financial assets (46) (49)
Financial assets at amortised cost | Loans and other credit-related commitments | Allowance for ECL | – personal    
Disclosure of credit risk exposure [line items]    
Financial assets 0 0
Financial assets at amortised cost | Loans and other credit-related commitments | Allowance for ECL | – corporate and commercial    
Disclosure of credit risk exposure [line items]    
Financial assets (40) (44)
Financial assets at amortised cost | Loans and other credit-related commitments | Allowance for ECL | – financial    
Disclosure of credit risk exposure [line items]    
Financial assets £ (6) £ (5)
Financial assets at amortised cost | Loans and other credit-related commitments | 12-month expected credit losses | Non-credit impaired    
Disclosure of credit risk exposure [line items]    
ECL coverage % 0.00% 0.00%
Financial assets at amortised cost | Loans and other credit-related commitments | 12-month expected credit losses | Non-credit impaired | – personal    
Disclosure of credit risk exposure [line items]    
ECL coverage % 0.00% 0.00%
Financial assets at amortised cost | Loans and other credit-related commitments | 12-month expected credit losses | Non-credit impaired | – corporate and commercial    
Disclosure of credit risk exposure [line items]    
ECL coverage % 0.00% 0.00%
Financial assets at amortised cost | Loans and other credit-related commitments | 12-month expected credit losses | Non-credit impaired | – financial    
Disclosure of credit risk exposure [line items]    
ECL coverage % 0.00% 0.00%
Financial assets at amortised cost | Loans and other credit-related commitments | 12-month expected credit losses | Non-credit impaired | Gross carrying/ nominal amount    
Disclosure of credit risk exposure [line items]    
Financial assets £ 142,777 £ 116,787
Financial assets at amortised cost | Loans and other credit-related commitments | 12-month expected credit losses | Non-credit impaired | Gross carrying/ nominal amount | – personal    
Disclosure of credit risk exposure [line items]    
Financial assets 1,050 1,149
Financial assets at amortised cost | Loans and other credit-related commitments | 12-month expected credit losses | Non-credit impaired | Gross carrying/ nominal amount | – corporate and commercial    
Disclosure of credit risk exposure [line items]    
Financial assets 60,314 58,281
Financial assets at amortised cost | Loans and other credit-related commitments | 12-month expected credit losses | Non-credit impaired | Gross carrying/ nominal amount | – financial    
Disclosure of credit risk exposure [line items]    
Financial assets 81,413 57,357
Financial assets at amortised cost | Loans and other credit-related commitments | 12-month expected credit losses | Non-credit impaired | Allowance for ECL    
Disclosure of credit risk exposure [line items]    
Financial assets (17) (14)
Financial assets at amortised cost | Loans and other credit-related commitments | 12-month expected credit losses | Non-credit impaired | Allowance for ECL | – personal    
Disclosure of credit risk exposure [line items]    
Financial assets 0 0
Financial assets at amortised cost | Loans and other credit-related commitments | 12-month expected credit losses | Non-credit impaired | Allowance for ECL | – corporate and commercial    
Disclosure of credit risk exposure [line items]    
Financial assets (13) (12)
Financial assets at amortised cost | Loans and other credit-related commitments | 12-month expected credit losses | Non-credit impaired | Allowance for ECL | – financial    
Disclosure of credit risk exposure [line items]    
Financial assets £ (4) £ (2)
Financial assets at amortised cost | Loans and other credit-related commitments | Lifetime expected credit losses | Non-credit impaired    
Disclosure of credit risk exposure [line items]    
ECL coverage % 0.60% 0.50%
Financial assets at amortised cost | Loans and other credit-related commitments | Lifetime expected credit losses | Non-credit impaired | – personal    
Disclosure of credit risk exposure [line items]    
ECL coverage % 0.00% 0.00%
Financial assets at amortised cost | Loans and other credit-related commitments | Lifetime expected credit losses | Non-credit impaired | – corporate and commercial    
Disclosure of credit risk exposure [line items]    
ECL coverage % 0.60% 0.60%
Financial assets at amortised cost | Loans and other credit-related commitments | Lifetime expected credit losses | Non-credit impaired | – financial    
Disclosure of credit risk exposure [line items]    
ECL coverage % 0.30% 0.20%
Financial assets at amortised cost | Loans and other credit-related commitments | Lifetime expected credit losses | Non-credit impaired | Gross carrying/ nominal amount    
Disclosure of credit risk exposure [line items]    
Financial assets £ 2,701 £ 4,812
Financial assets at amortised cost | Loans and other credit-related commitments | Lifetime expected credit losses | Non-credit impaired | Gross carrying/ nominal amount | – personal    
Disclosure of credit risk exposure [line items]    
Financial assets 27 4
Financial assets at amortised cost | Loans and other credit-related commitments | Lifetime expected credit losses | Non-credit impaired | Gross carrying/ nominal amount | – corporate and commercial    
Disclosure of credit risk exposure [line items]    
Financial assets 2,361 3,775
Financial assets at amortised cost | Loans and other credit-related commitments | Lifetime expected credit losses | Non-credit impaired | Gross carrying/ nominal amount | – financial    
Disclosure of credit risk exposure [line items]    
Financial assets 313 1,033
Financial assets at amortised cost | Loans and other credit-related commitments | Lifetime expected credit losses | Non-credit impaired | Allowance for ECL    
Disclosure of credit risk exposure [line items]    
Financial assets (15) (24)
Financial assets at amortised cost | Loans and other credit-related commitments | Lifetime expected credit losses | Non-credit impaired | Allowance for ECL | – personal    
Disclosure of credit risk exposure [line items]    
Financial assets 0 0
Financial assets at amortised cost | Loans and other credit-related commitments | Lifetime expected credit losses | Non-credit impaired | Allowance for ECL | – corporate and commercial    
Disclosure of credit risk exposure [line items]    
Financial assets (14) (22)
Financial assets at amortised cost | Loans and other credit-related commitments | Lifetime expected credit losses | Non-credit impaired | Allowance for ECL | – financial    
Disclosure of credit risk exposure [line items]    
Financial assets £ (1) £ (2)
Financial assets at amortised cost | Loans and other credit-related commitments | Lifetime expected credit losses | Credit impaired    
Disclosure of credit risk exposure [line items]    
ECL coverage % 10.00% 6.80%
Financial assets at amortised cost | Loans and other credit-related commitments | Lifetime expected credit losses | Credit impaired | – personal    
Disclosure of credit risk exposure [line items]    
ECL coverage % 0.00% 0.00%
Financial assets at amortised cost | Loans and other credit-related commitments | Lifetime expected credit losses | Credit impaired | – corporate and commercial    
Disclosure of credit risk exposure [line items]    
ECL coverage % 9.60% 6.80%
Financial assets at amortised cost | Loans and other credit-related commitments | Lifetime expected credit losses | Credit impaired | – financial    
Disclosure of credit risk exposure [line items]    
ECL coverage % 50.00% 7.10%
Financial assets at amortised cost | Loans and other credit-related commitments | Lifetime expected credit losses | Credit impaired | Gross carrying/ nominal amount    
Disclosure of credit risk exposure [line items]    
Financial assets £ 140 £ 162
Financial assets at amortised cost | Loans and other credit-related commitments | Lifetime expected credit losses | Credit impaired | Gross carrying/ nominal amount | – personal    
Disclosure of credit risk exposure [line items]    
Financial assets 2 2
Financial assets at amortised cost | Loans and other credit-related commitments | Lifetime expected credit losses | Credit impaired | Gross carrying/ nominal amount | – corporate and commercial    
Disclosure of credit risk exposure [line items]    
Financial assets 136 146
Financial assets at amortised cost | Loans and other credit-related commitments | Lifetime expected credit losses | Credit impaired | Gross carrying/ nominal amount | – financial    
Disclosure of credit risk exposure [line items]    
Financial assets 2 14
Financial assets at amortised cost | Loans and other credit-related commitments | Lifetime expected credit losses | Credit impaired | Allowance for ECL    
Disclosure of credit risk exposure [line items]    
Financial assets (14) (11)
Financial assets at amortised cost | Loans and other credit-related commitments | Lifetime expected credit losses | Credit impaired | Allowance for ECL | – personal    
Disclosure of credit risk exposure [line items]    
Financial assets 0 0
Financial assets at amortised cost | Loans and other credit-related commitments | Lifetime expected credit losses | Credit impaired | Allowance for ECL | – corporate and commercial    
Disclosure of credit risk exposure [line items]    
Financial assets (13) (10)
Financial assets at amortised cost | Loans and other credit-related commitments | Lifetime expected credit losses | Credit impaired | Allowance for ECL | – financial    
Disclosure of credit risk exposure [line items]    
Financial assets £ (1) £ (1)
Financial assets at amortised cost | Loans and other credit-related commitments | Lifetime expected credit losses | POCI    
Disclosure of credit risk exposure [line items]    
ECL coverage % 0.00% 0.00%
Financial assets at amortised cost | Loans and other credit-related commitments | Lifetime expected credit losses | POCI | – personal    
Disclosure of credit risk exposure [line items]    
ECL coverage % 0.00% 0.00%
Financial assets at amortised cost | Loans and other credit-related commitments | Lifetime expected credit losses | POCI | – corporate and commercial    
Disclosure of credit risk exposure [line items]    
ECL coverage % 0.00% 0.00%
Financial assets at amortised cost | Loans and other credit-related commitments | Lifetime expected credit losses | POCI | – financial    
Disclosure of credit risk exposure [line items]    
ECL coverage % 0.00% 0.00%
Financial assets at amortised cost | Loans and other credit-related commitments | Lifetime expected credit losses | POCI | Gross carrying/ nominal amount    
Disclosure of credit risk exposure [line items]    
Financial assets £ 3 £ 3
Financial assets at amortised cost | Loans and other credit-related commitments | Lifetime expected credit losses | POCI | Gross carrying/ nominal amount | – personal    
Disclosure of credit risk exposure [line items]    
Financial assets 0 0
Financial assets at amortised cost | Loans and other credit-related commitments | Lifetime expected credit losses | POCI | Gross carrying/ nominal amount | – corporate and commercial    
Disclosure of credit risk exposure [line items]    
Financial assets 3 3
Financial assets at amortised cost | Loans and other credit-related commitments | Lifetime expected credit losses | POCI | Gross carrying/ nominal amount | – financial    
Disclosure of credit risk exposure [line items]    
Financial assets 0 0
Financial assets at amortised cost | Loans and other credit-related commitments | Lifetime expected credit losses | POCI | Allowance for ECL    
Disclosure of credit risk exposure [line items]    
Financial assets 0 0
Financial assets at amortised cost | Loans and other credit-related commitments | Lifetime expected credit losses | POCI | Allowance for ECL | – personal    
Disclosure of credit risk exposure [line items]    
Financial assets 0 0
Financial assets at amortised cost | Loans and other credit-related commitments | Lifetime expected credit losses | POCI | Allowance for ECL | – corporate and commercial    
Disclosure of credit risk exposure [line items]    
Financial assets 0 0
Financial assets at amortised cost | Loans and other credit-related commitments | Lifetime expected credit losses | POCI | Allowance for ECL | – financial    
Disclosure of credit risk exposure [line items]    
Financial assets £ 0 £ 0
Financial assets at amortised cost | Financial guarantees    
Disclosure of credit risk exposure [line items]    
ECL coverage % 0.10% 0.30%
Financial assets at amortised cost | Financial guarantees | – personal    
Disclosure of credit risk exposure [line items]    
ECL coverage % 0.00% 0.00%
Financial assets at amortised cost | Financial guarantees | – corporate and commercial    
Disclosure of credit risk exposure [line items]    
ECL coverage % 0.30% 0.60%
Financial assets at amortised cost | Financial guarantees | – financial    
Disclosure of credit risk exposure [line items]    
ECL coverage % 0.00% 0.10%
Financial assets at amortised cost | Financial guarantees | Gross carrying/ nominal amount    
Disclosure of credit risk exposure [line items]    
Financial assets £ 2,855 £ 2,876
Financial assets at amortised cost | Financial guarantees | Gross carrying/ nominal amount | – personal    
Disclosure of credit risk exposure [line items]    
Financial assets 125 131
Financial assets at amortised cost | Financial guarantees | Gross carrying/ nominal amount | – corporate and commercial    
Disclosure of credit risk exposure [line items]    
Financial assets 1,322 1,374
Financial assets at amortised cost | Financial guarantees | Gross carrying/ nominal amount | – financial    
Disclosure of credit risk exposure [line items]    
Financial assets 1,408 1,371
Financial assets at amortised cost | Financial guarantees | Allowance for ECL    
Disclosure of credit risk exposure [line items]    
Financial assets (4) (9)
Financial assets at amortised cost | Financial guarantees | Allowance for ECL | – personal    
Disclosure of credit risk exposure [line items]    
Financial assets 0 0
Financial assets at amortised cost | Financial guarantees | Allowance for ECL | – corporate and commercial    
Disclosure of credit risk exposure [line items]    
Financial assets (4) (8)
Financial assets at amortised cost | Financial guarantees | Allowance for ECL | – financial    
Disclosure of credit risk exposure [line items]    
Financial assets £ 0 £ (1)
Financial assets at amortised cost | Financial guarantees | 12-month expected credit losses | Non-credit impaired    
Disclosure of credit risk exposure [line items]    
ECL coverage % 0.00% 0.10%
Financial assets at amortised cost | Financial guarantees | 12-month expected credit losses | Non-credit impaired | – personal    
Disclosure of credit risk exposure [line items]    
ECL coverage % 0.00% 0.00%
Financial assets at amortised cost | Financial guarantees | 12-month expected credit losses | Non-credit impaired | – corporate and commercial    
Disclosure of credit risk exposure [line items]    
ECL coverage % 0.10% 0.20%
Financial assets at amortised cost | Financial guarantees | 12-month expected credit losses | Non-credit impaired | – financial    
Disclosure of credit risk exposure [line items]    
ECL coverage % 0.00% 0.00%
Financial assets at amortised cost | Financial guarantees | 12-month expected credit losses | Non-credit impaired | Gross carrying/ nominal amount    
Disclosure of credit risk exposure [line items]    
Financial assets £ 2,582 £ 2,763
Financial assets at amortised cost | Financial guarantees | 12-month expected credit losses | Non-credit impaired | Gross carrying/ nominal amount | – personal    
Disclosure of credit risk exposure [line items]    
Financial assets 124 130
Financial assets at amortised cost | Financial guarantees | 12-month expected credit losses | Non-credit impaired | Gross carrying/ nominal amount | – corporate and commercial    
Disclosure of credit risk exposure [line items]    
Financial assets 1,102 1,288
Financial assets at amortised cost | Financial guarantees | 12-month expected credit losses | Non-credit impaired | Gross carrying/ nominal amount | – financial    
Disclosure of credit risk exposure [line items]    
Financial assets 1,356 1,345
Financial assets at amortised cost | Financial guarantees | 12-month expected credit losses | Non-credit impaired | Allowance for ECL    
Disclosure of credit risk exposure [line items]    
Financial assets (1) (2)
Financial assets at amortised cost | Financial guarantees | 12-month expected credit losses | Non-credit impaired | Allowance for ECL | – personal    
Disclosure of credit risk exposure [line items]    
Financial assets 0 0
Financial assets at amortised cost | Financial guarantees | 12-month expected credit losses | Non-credit impaired | Allowance for ECL | – corporate and commercial    
Disclosure of credit risk exposure [line items]    
Financial assets (1) (2)
Financial assets at amortised cost | Financial guarantees | 12-month expected credit losses | Non-credit impaired | Allowance for ECL | – financial    
Disclosure of credit risk exposure [line items]    
Financial assets £ 0 £ 0
Financial assets at amortised cost | Financial guarantees | Lifetime expected credit losses | Non-credit impaired    
Disclosure of credit risk exposure [line items]    
ECL coverage % 0.40% 1.40%
Financial assets at amortised cost | Financial guarantees | Lifetime expected credit losses | Non-credit impaired | – personal    
Disclosure of credit risk exposure [line items]    
ECL coverage % 0.00% 0.00%
Financial assets at amortised cost | Financial guarantees | Lifetime expected credit losses | Non-credit impaired | – corporate and commercial    
Disclosure of credit risk exposure [line items]    
ECL coverage % 0.60% 2.30%
Financial assets at amortised cost | Financial guarantees | Lifetime expected credit losses | Non-credit impaired | – financial    
Disclosure of credit risk exposure [line items]    
ECL coverage % 0.00% 0.00%
Financial assets at amortised cost | Financial guarantees | Lifetime expected credit losses | Non-credit impaired | Gross carrying/ nominal amount    
Disclosure of credit risk exposure [line items]    
Financial assets £ 229 £ 69
Financial assets at amortised cost | Financial guarantees | Lifetime expected credit losses | Non-credit impaired | Gross carrying/ nominal amount | – personal    
Disclosure of credit risk exposure [line items]    
Financial assets 1 1
Financial assets at amortised cost | Financial guarantees | Lifetime expected credit losses | Non-credit impaired | Gross carrying/ nominal amount | – corporate and commercial    
Disclosure of credit risk exposure [line items]    
Financial assets 176 43
Financial assets at amortised cost | Financial guarantees | Lifetime expected credit losses | Non-credit impaired | Gross carrying/ nominal amount | – financial    
Disclosure of credit risk exposure [line items]    
Financial assets 52 25
Financial assets at amortised cost | Financial guarantees | Lifetime expected credit losses | Non-credit impaired | Allowance for ECL    
Disclosure of credit risk exposure [line items]    
Financial assets (1) (1)
Financial assets at amortised cost | Financial guarantees | Lifetime expected credit losses | Non-credit impaired | Allowance for ECL | – personal    
Disclosure of credit risk exposure [line items]    
Financial assets 0 0
Financial assets at amortised cost | Financial guarantees | Lifetime expected credit losses | Non-credit impaired | Allowance for ECL | – corporate and commercial    
Disclosure of credit risk exposure [line items]    
Financial assets (1) (1)
Financial assets at amortised cost | Financial guarantees | Lifetime expected credit losses | Non-credit impaired | Allowance for ECL | – financial    
Disclosure of credit risk exposure [line items]    
Financial assets £ 0 £ 0
Financial assets at amortised cost | Financial guarantees | Lifetime expected credit losses | Credit impaired    
Disclosure of credit risk exposure [line items]    
ECL coverage % 4.50% 13.60%
Financial assets at amortised cost | Financial guarantees | Lifetime expected credit losses | Credit impaired | – personal    
Disclosure of credit risk exposure [line items]    
ECL coverage % 0.00% 0.00%
Financial assets at amortised cost | Financial guarantees | Lifetime expected credit losses | Credit impaired | – corporate and commercial    
Disclosure of credit risk exposure [line items]    
ECL coverage % 4.50% 11.60%
Financial assets at amortised cost | Financial guarantees | Lifetime expected credit losses | Credit impaired | – financial    
Disclosure of credit risk exposure [line items]    
ECL coverage % 0.00% 100.00%
Financial assets at amortised cost | Financial guarantees | Lifetime expected credit losses | Credit impaired | Gross carrying/ nominal amount    
Disclosure of credit risk exposure [line items]    
Financial assets £ 44 £ 44
Financial assets at amortised cost | Financial guarantees | Lifetime expected credit losses | Credit impaired | Gross carrying/ nominal amount | – personal    
Disclosure of credit risk exposure [line items]    
Financial assets 0 0
Financial assets at amortised cost | Financial guarantees | Lifetime expected credit losses | Credit impaired | Gross carrying/ nominal amount | – corporate and commercial    
Disclosure of credit risk exposure [line items]    
Financial assets 44 43
Financial assets at amortised cost | Financial guarantees | Lifetime expected credit losses | Credit impaired | Gross carrying/ nominal amount | – financial    
Disclosure of credit risk exposure [line items]    
Financial assets 0 1
Financial assets at amortised cost | Financial guarantees | Lifetime expected credit losses | Credit impaired | Allowance for ECL    
Disclosure of credit risk exposure [line items]    
Financial assets (2) (6)
Financial assets at amortised cost | Financial guarantees | Lifetime expected credit losses | Credit impaired | Allowance for ECL | – personal    
Disclosure of credit risk exposure [line items]    
Financial assets 0 0
Financial assets at amortised cost | Financial guarantees | Lifetime expected credit losses | Credit impaired | Allowance for ECL | – corporate and commercial    
Disclosure of credit risk exposure [line items]    
Financial assets (2) (5)
Financial assets at amortised cost | Financial guarantees | Lifetime expected credit losses | Credit impaired | Allowance for ECL | – financial    
Disclosure of credit risk exposure [line items]    
Financial assets £ 0 £ (1)
Financial assets at amortised cost | Financial guarantees | Lifetime expected credit losses | POCI    
Disclosure of credit risk exposure [line items]    
ECL coverage % 0.00% 0.00%
Financial assets at amortised cost | Financial guarantees | Lifetime expected credit losses | POCI | – personal    
Disclosure of credit risk exposure [line items]    
ECL coverage % 0.00% 0.00%
Financial assets at amortised cost | Financial guarantees | Lifetime expected credit losses | POCI | – corporate and commercial    
Disclosure of credit risk exposure [line items]    
ECL coverage % 0.00% 0.00%
Financial assets at amortised cost | Financial guarantees | Lifetime expected credit losses | POCI | – financial    
Disclosure of credit risk exposure [line items]    
ECL coverage % 0.00% 0.00%
Financial assets at amortised cost | Financial guarantees | Lifetime expected credit losses | POCI | Gross carrying/ nominal amount    
Disclosure of credit risk exposure [line items]    
Financial assets £ 0 £ 0
Financial assets at amortised cost | Financial guarantees | Lifetime expected credit losses | POCI | Gross carrying/ nominal amount | – personal    
Disclosure of credit risk exposure [line items]    
Financial assets 0 0
Financial assets at amortised cost | Financial guarantees | Lifetime expected credit losses | POCI | Gross carrying/ nominal amount | – corporate and commercial    
Disclosure of credit risk exposure [line items]    
Financial assets 0 0
Financial assets at amortised cost | Financial guarantees | Lifetime expected credit losses | POCI | Gross carrying/ nominal amount | – financial    
Disclosure of credit risk exposure [line items]    
Financial assets 0 0
Financial assets at amortised cost | Financial guarantees | Lifetime expected credit losses | POCI | Allowance for ECL    
Disclosure of credit risk exposure [line items]    
Financial assets 0 0
Financial assets at amortised cost | Financial guarantees | Lifetime expected credit losses | POCI | Allowance for ECL | – personal    
Disclosure of credit risk exposure [line items]    
Financial assets 0 0
Financial assets at amortised cost | Financial guarantees | Lifetime expected credit losses | POCI | Allowance for ECL | – corporate and commercial    
Disclosure of credit risk exposure [line items]    
Financial assets 0 0
Financial assets at amortised cost | Financial guarantees | Lifetime expected credit losses | POCI | Allowance for ECL | – financial    
Disclosure of credit risk exposure [line items]    
Financial assets £ 0 £ 0