v3.25.2
Credit Risk - Disclosure of movement in gross exposures and impairment allowance including provisions for loan commitments and financial guarantees (Details) - GBP (£)
£ in Millions
6 Months Ended 12 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
Reconciliation of ECL movement to impairment charge/(release) for the period      
Impairment loss (reversal of impairment loss) £ 1,112 £ 897 £ 1,982
Financial guarantee contracts      
Reconciliation of ECL movement to impairment charge/(release) for the period      
Recoveries and reimbursements (58) (18)  
ECL movement on loan commitments and other financial guarantees      
Loans and advances at amortised cost      
Opening balance 431,718    
Closing balance 416,252   431,718
Gross exposure | Retail mortgages      
Loans and advances at amortised cost      
Opening balance 168,248    
Business activity in the period 15,591    
Refinements to models used for calculation 0    
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes (4,465)    
Final repayments (7,381)    
Disposals (10)    
Write-offs (13)    
Closing balance 171,970   168,248
Gross exposure | Retail credit cards      
Loans and advances at amortised cost      
Opening balance 38,086    
Business activity in the period 2,123    
Refinements to models used for calculation 0    
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes (2,591)    
Final repayments (149)    
Disposals (245)    
Write-offs (516)    
Closing balance 36,708   38,086
Gross exposure | Retail other      
Loans and advances at amortised cost      
Opening balance 14,218    
Business activity in the period 3,160    
Refinements to models used for calculation 0    
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes (581)    
Final repayments (2,458)    
Disposals (21)    
Write-offs (57)    
Closing balance 14,261   14,218
Gross exposure | Corporate loans      
Loans and advances at amortised cost      
Opening balance 130,791    
Business activity in the period 17,983    
Refinements to models used for calculation 0    
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes (921)    
Final repayments (17,733)    
Disposals (124)    
Write-offs (161)    
Closing balance 129,835   130,791
Gross exposure | ECL movement on loan commitments and other financial guarantees      
Loans and advances at amortised cost      
Opening balance 432,157    
Closing balance 416,677   432,157
Gross exposure | ECL movement on other financial assets      
Loans and advances at amortised cost      
Opening balance 204,200    
Closing balance 239,200   204,200
Impairment allowance      
Loans and advances at amortised cost      
Opening balance (5,532)    
Closing balance (5,395)   (5,532)
Reconciliation of ECL movement to impairment charge/(release) for the period      
Recoveries and reimbursements (101)    
ECL charge on assets held for sale 105    
Total exchange and other adjustments 269    
Impairment allowance | Loans and advances      
Reconciliation of ECL movement to impairment charge/(release) for the period      
ECL movement 858    
Impairment allowance | Retail mortgages      
Loans and advances at amortised cost      
Opening balance (187)    
Business activity in the period (8)    
Refinements to models used for calculation 0    
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes (18)    
Final repayments 14    
Disposals 6    
Write-offs 13    
Closing balance (180)   (187)
Reconciliation of ECL movement to impairment charge/(release) for the period      
ECL movement 12    
Impairment allowance | Retail credit cards      
Loans and advances at amortised cost      
Opening balance (3,307)    
Business activity in the period (70)    
Refinements to models used for calculation 32    
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes (477)    
Final repayments 8    
Disposals 190    
Write-offs 516    
Closing balance (3,108)   (3,307)
Reconciliation of ECL movement to impairment charge/(release) for the period      
ECL movement 507    
Impairment allowance | Retail other      
Loans and advances at amortised cost      
Opening balance (410)    
Business activity in the period (46)    
Refinements to models used for calculation 0    
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes (98)    
Final repayments 27    
Disposals 15    
Write-offs 57    
Closing balance (455)   (410)
Reconciliation of ECL movement to impairment charge/(release) for the period      
ECL movement 117    
Impairment allowance | Corporate loans      
Loans and advances at amortised cost      
Opening balance (1,166)    
Business activity in the period (78)    
Refinements to models used for calculation 14    
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes (252)    
Final repayments 94    
Disposals 24    
Write-offs 161    
Closing balance (1,203)   (1,166)
Reconciliation of ECL movement to impairment charge/(release) for the period      
ECL movement 222    
Impairment allowance | Corporate loans | Government debt      
Loans and advances at amortised cost      
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes (200)    
Impairment allowance | ECL movement on loan commitments and other financial guarantees      
Loans and advances at amortised cost      
Opening balance (439)    
Closing balance (425)   (439)
Reconciliation of ECL movement to impairment charge/(release) for the period      
ECL movement (14)    
Impairment allowance | ECL movement on other financial assets      
Loans and advances at amortised cost      
Opening balance (156)    
Closing balance (150)   (156)
Reconciliation of ECL movement to impairment charge/(release) for the period      
ECL movement (6)    
Impairment allowance | ECL movement on debt securities at amortised cost      
Reconciliation of ECL movement to impairment charge/(release) for the period      
ECL movement 1    
Transfers from Stage 1 to Stage 2 | Gross exposure | Retail mortgages      
Loans and advances at amortised cost      
Transfers 0    
Transfers from Stage 1 to Stage 2 | Gross exposure | Retail credit cards      
Loans and advances at amortised cost      
Transfers 0    
Transfers from Stage 1 to Stage 2 | Gross exposure | Retail other      
Loans and advances at amortised cost      
Transfers 0    
Transfers from Stage 1 to Stage 2 | Gross exposure | Corporate loans      
Loans and advances at amortised cost      
Transfers 0    
Transfers from Stage 1 to Stage 2 | Impairment allowance | Retail mortgages      
Loans and advances at amortised cost      
Transfers 0    
Transfers from Stage 1 to Stage 2 | Impairment allowance | Retail credit cards      
Loans and advances at amortised cost      
Transfers 0    
Transfers from Stage 1 to Stage 2 | Impairment allowance | Retail other      
Loans and advances at amortised cost      
Transfers 0    
Transfers from Stage 1 to Stage 2 | Impairment allowance | Corporate loans      
Loans and advances at amortised cost      
Transfers 0    
Transfers from Stage 2 to Stage 1 | Gross exposure | Retail mortgages      
Loans and advances at amortised cost      
Transfers 0    
Transfers from Stage 2 to Stage 1 | Gross exposure | Retail credit cards      
Loans and advances at amortised cost      
Transfers 0    
Transfers from Stage 2 to Stage 1 | Gross exposure | Retail other      
Loans and advances at amortised cost      
Transfers 0    
Transfers from Stage 2 to Stage 1 | Gross exposure | Corporate loans      
Loans and advances at amortised cost      
Transfers 0    
Transfers from Stage 2 to Stage 1 | Impairment allowance | Retail mortgages      
Loans and advances at amortised cost      
Transfers 0    
Transfers from Stage 2 to Stage 1 | Impairment allowance | Retail credit cards      
Loans and advances at amortised cost      
Transfers 0    
Transfers from Stage 2 to Stage 1 | Impairment allowance | Retail other      
Loans and advances at amortised cost      
Transfers 0    
Transfers from Stage 2 to Stage 1 | Impairment allowance | Corporate loans      
Loans and advances at amortised cost      
Transfers 0    
Transfers to Stage 3 | Gross exposure | Retail mortgages      
Loans and advances at amortised cost      
Transfers 0    
Transfers to Stage 3 | Gross exposure | Retail credit cards      
Loans and advances at amortised cost      
Transfers 0    
Transfers to Stage 3 | Gross exposure | Retail other      
Loans and advances at amortised cost      
Transfers 0    
Transfers to Stage 3 | Gross exposure | Corporate loans      
Loans and advances at amortised cost      
Transfers 0    
Transfers to Stage 3 | Impairment allowance | Retail mortgages      
Loans and advances at amortised cost      
Transfers 0    
Transfers to Stage 3 | Impairment allowance | Retail credit cards      
Loans and advances at amortised cost      
Transfers 0    
Transfers to Stage 3 | Impairment allowance | Retail other      
Loans and advances at amortised cost      
Transfers 0    
Transfers to Stage 3 | Impairment allowance | Corporate loans      
Loans and advances at amortised cost      
Transfers 0    
Transfers from Stage 3 | Gross exposure | Retail mortgages      
Loans and advances at amortised cost      
Transfers 0    
Transfers from Stage 3 | Gross exposure | Retail credit cards      
Loans and advances at amortised cost      
Transfers 0    
Transfers from Stage 3 | Gross exposure | Retail other      
Loans and advances at amortised cost      
Transfers 0    
Transfers from Stage 3 | Gross exposure | Corporate loans      
Loans and advances at amortised cost      
Transfers 0    
Transfers from Stage 3 | Impairment allowance | Retail mortgages      
Loans and advances at amortised cost      
Transfers 0    
Transfers from Stage 3 | Impairment allowance | Retail credit cards      
Loans and advances at amortised cost      
Transfers 0    
Transfers from Stage 3 | Impairment allowance | Retail other      
Loans and advances at amortised cost      
Transfers 0    
Transfers from Stage 3 | Impairment allowance | Corporate loans      
Loans and advances at amortised cost      
Transfers 0    
Financial assets at amortised cost | Loans and advances      
Loans and advances at amortised cost      
Opening balance 346,273    
Write-offs (747) (760)  
Closing balance 347,828   346,273
Reconciliation of ECL movement to impairment charge/(release) for the period      
Post write-off recoveries 43 38  
Net write-offs 704 £ 722  
Financial assets at amortised cost | Retail mortgages      
Loans and advances at amortised cost      
Opening balance 168,061    
Closing balance 171,790   168,061
Financial assets at amortised cost | Retail credit cards      
Loans and advances at amortised cost      
Opening balance 34,779    
Closing balance 33,600   34,779
Financial assets at amortised cost | Retail other      
Loans and advances at amortised cost      
Opening balance 13,808    
Closing balance 13,806   13,808
Financial assets at amortised cost | Corporate loans      
Loans and advances at amortised cost      
Opening balance 129,625    
Closing balance 128,632   129,625
Financial assets at amortised cost | ECL movement on debt securities at amortised cost      
Loans and advances at amortised cost      
Opening balance 68,210    
Closing balance 69,936   68,210
Financial assets at amortised cost | Gross exposure | Loans and advances      
Loans and advances at amortised cost      
Opening balance 351,343    
Closing balance 352,774   351,343
Financial assets at amortised cost | Gross exposure | Retail mortgages      
Loans and advances at amortised cost      
Opening balance 168,248    
Disposals (10)    
Closing balance 171,970   168,248
Financial assets at amortised cost | Gross exposure | Retail credit cards      
Loans and advances at amortised cost      
Opening balance 38,086    
Disposals (245)    
Closing balance 36,708   38,086
Financial assets at amortised cost | Gross exposure | Retail other      
Loans and advances at amortised cost      
Opening balance 14,218    
Disposals (21)    
Closing balance 14,261   14,218
Financial assets at amortised cost | Gross exposure | Corporate loans      
Loans and advances at amortised cost      
Opening balance 130,791    
Disposals (124)    
Closing balance 129,835   130,791
Financial assets at amortised cost | Gross exposure | ECL movement on debt securities at amortised cost      
Loans and advances at amortised cost      
Opening balance 68,233    
Closing balance 69,960   68,233
Financial assets at amortised cost | Impairment allowance | Loans and advances      
Loans and advances at amortised cost      
Opening balance (5,070)    
Closing balance (4,946)   (5,070)
Financial assets at amortised cost | Impairment allowance | Retail mortgages      
Loans and advances at amortised cost      
Opening balance (187)    
Closing balance (180)   (187)
Financial assets at amortised cost | Impairment allowance | Retail credit cards      
Loans and advances at amortised cost      
Opening balance (3,307)    
Closing balance (3,108)   (3,307)
Financial assets at amortised cost | Impairment allowance | Retail credit cards | US      
Loans and advances at amortised cost      
Refinements to models used for calculation 32    
Financial assets at amortised cost | Impairment allowance | Retail other      
Loans and advances at amortised cost      
Opening balance (410)    
Closing balance (455)   (410)
Financial assets at amortised cost | Impairment allowance | Corporate loans      
Loans and advances at amortised cost      
Opening balance (1,166)    
Closing balance (1,203)   (1,166)
Financial assets at amortised cost | Impairment allowance | Corporate loans | Barclays Investment Bank      
Loans and advances at amortised cost      
Refinements to models used for calculation 14    
Financial assets at amortised cost | Impairment allowance | ECL movement on debt securities at amortised cost      
Loans and advances at amortised cost      
Opening balance (23)    
Closing balance (24)   (23)
Stage 1 | ECL movement on loan commitments and other financial guarantees      
Loans and advances at amortised cost      
Opening balance 412,091    
Closing balance 398,511   412,091
Stage 1 | Gross exposure | Retail mortgages      
Loans and advances at amortised cost      
Opening balance 146,690    
Business activity in the period 15,180    
Refinements to models used for calculation 0    
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes (3,839)    
Final repayments (6,279)    
Disposals 0    
Write-offs 0    
Closing balance 152,861   146,690
Stage 1 | Gross exposure | Retail credit cards      
Loans and advances at amortised cost      
Opening balance 31,126    
Business activity in the period 1,951    
Refinements to models used for calculation 0    
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes (2,310)    
Final repayments (136)    
Disposals 0    
Write-offs 0    
Closing balance 29,768   31,126
Stage 1 | Gross exposure | Retail other      
Loans and advances at amortised cost      
Opening balance 12,450    
Business activity in the period 2,969    
Refinements to models used for calculation 0    
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes (615)    
Final repayments (2,049)    
Disposals 0    
Write-offs 0    
Closing balance 12,245   12,450
Stage 1 | Gross exposure | Corporate loans      
Loans and advances at amortised cost      
Opening balance 116,508    
Business activity in the period 16,320    
Refinements to models used for calculation 0    
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes 181    
Final repayments (15,888)    
Disposals (1)    
Write-offs 0    
Closing balance 115,899   116,508
Stage 1 | Gross exposure | ECL movement on loan commitments and other financial guarantees      
Loans and advances at amortised cost      
Opening balance 412,255    
Closing balance 398,675   412,255
Stage 1 | Gross exposure | ECL movement on other financial assets      
Loans and advances at amortised cost      
Opening balance 202,700    
Closing balance 238,200   202,700
Stage 1 | Impairment allowance      
Reconciliation of ECL movement to impairment charge/(release) for the period      
Recoveries and reimbursements (4)    
Stage 1 | Impairment allowance | Loans and advances      
Reconciliation of ECL movement to impairment charge/(release) for the period      
ECL movement (124)    
Stage 1 | Impairment allowance | Retail mortgages      
Loans and advances at amortised cost      
Opening balance (38)    
Business activity in the period (6)    
Refinements to models used for calculation 0    
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes 26    
Final repayments 2    
Disposals 0    
Write-offs 0    
Closing balance (37)   (38)
Reconciliation of ECL movement to impairment charge/(release) for the period      
ECL movement (1)    
Stage 1 | Impairment allowance | Retail credit cards      
Loans and advances at amortised cost      
Opening balance (553)    
Business activity in the period (31)    
Refinements to models used for calculation (14)    
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes 377    
Final repayments 5    
Disposals 0    
Write-offs 0    
Closing balance (457)   (553)
Reconciliation of ECL movement to impairment charge/(release) for the period      
ECL movement (96)    
Stage 1 | Impairment allowance | Retail other      
Loans and advances at amortised cost      
Opening balance (138)    
Business activity in the period (23)    
Refinements to models used for calculation 0    
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes 54    
Final repayments 12    
Disposals 0    
Write-offs 0    
Closing balance (103)   (138)
Reconciliation of ECL movement to impairment charge/(release) for the period      
ECL movement (35)    
Stage 1 | Impairment allowance | Corporate loans      
Loans and advances at amortised cost      
Opening balance (209)    
Business activity in the period (26)    
Refinements to models used for calculation 8    
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes 33    
Final repayments 14    
Disposals 1    
Write-offs 0    
Closing balance (216)   (209)
Reconciliation of ECL movement to impairment charge/(release) for the period      
ECL movement 8    
Stage 1 | Impairment allowance | ECL movement on loan commitments and other financial guarantees      
Loans and advances at amortised cost      
Opening balance (164)    
Closing balance (164)   (164)
Reconciliation of ECL movement to impairment charge/(release) for the period      
ECL movement 0    
Stage 1 | Impairment allowance | ECL movement on other financial assets      
Loans and advances at amortised cost      
Opening balance (19)    
Closing balance (23)   (19)
Reconciliation of ECL movement to impairment charge/(release) for the period      
ECL movement 4    
Stage 1 | Impairment allowance | ECL movement on debt securities at amortised cost      
Reconciliation of ECL movement to impairment charge/(release) for the period      
ECL movement 0    
Stage 1 | Transfers from Stage 1 to Stage 2 | Gross exposure | Retail mortgages      
Loans and advances at amortised cost      
Transfers (5,409)    
Stage 1 | Transfers from Stage 1 to Stage 2 | Gross exposure | Retail credit cards      
Loans and advances at amortised cost      
Transfers (2,065)    
Stage 1 | Transfers from Stage 1 to Stage 2 | Gross exposure | Retail other      
Loans and advances at amortised cost      
Transfers (757)    
Stage 1 | Transfers from Stage 1 to Stage 2 | Gross exposure | Corporate loans      
Loans and advances at amortised cost      
Transfers (3,210)    
Stage 1 | Transfers from Stage 1 to Stage 2 | Impairment allowance | Retail mortgages      
Loans and advances at amortised cost      
Transfers 2    
Stage 1 | Transfers from Stage 1 to Stage 2 | Impairment allowance | Retail credit cards      
Loans and advances at amortised cost      
Transfers 59    
Stage 1 | Transfers from Stage 1 to Stage 2 | Impairment allowance | Retail other      
Loans and advances at amortised cost      
Transfers 12    
Stage 1 | Transfers from Stage 1 to Stage 2 | Impairment allowance | Corporate loans      
Loans and advances at amortised cost      
Transfers 17    
Stage 1 | Transfers from Stage 2 to Stage 1 | Gross exposure | Retail mortgages      
Loans and advances at amortised cost      
Transfers 6,592    
Stage 1 | Transfers from Stage 2 to Stage 1 | Gross exposure | Retail credit cards      
Loans and advances at amortised cost      
Transfers 1,488    
Stage 1 | Transfers from Stage 2 to Stage 1 | Gross exposure | Retail other      
Loans and advances at amortised cost      
Transfers 309    
Stage 1 | Transfers from Stage 2 to Stage 1 | Gross exposure | Corporate loans      
Loans and advances at amortised cost      
Transfers 2,156    
Stage 1 | Transfers from Stage 2 to Stage 1 | Impairment allowance | Retail mortgages      
Loans and advances at amortised cost      
Transfers (21)    
Stage 1 | Transfers from Stage 2 to Stage 1 | Impairment allowance | Retail credit cards      
Loans and advances at amortised cost      
Transfers (306)    
Stage 1 | Transfers from Stage 2 to Stage 1 | Impairment allowance | Retail other      
Loans and advances at amortised cost      
Transfers (20)    
Stage 1 | Transfers from Stage 2 to Stage 1 | Impairment allowance | Corporate loans      
Loans and advances at amortised cost      
Transfers (46)    
Stage 1 | Transfers to Stage 3 | Gross exposure | Retail mortgages      
Loans and advances at amortised cost      
Transfers (153)    
Stage 1 | Transfers to Stage 3 | Gross exposure | Retail credit cards      
Loans and advances at amortised cost      
Transfers (298)    
Stage 1 | Transfers to Stage 3 | Gross exposure | Retail other      
Loans and advances at amortised cost      
Transfers (85)    
Stage 1 | Transfers to Stage 3 | Gross exposure | Corporate loans      
Loans and advances at amortised cost      
Transfers (374)    
Stage 1 | Transfers to Stage 3 | Impairment allowance | Retail mortgages      
Loans and advances at amortised cost      
Transfers 0    
Stage 1 | Transfers to Stage 3 | Impairment allowance | Retail credit cards      
Loans and advances at amortised cost      
Transfers 12    
Stage 1 | Transfers to Stage 3 | Impairment allowance | Retail other      
Loans and advances at amortised cost      
Transfers 1    
Stage 1 | Transfers to Stage 3 | Impairment allowance | Corporate loans      
Loans and advances at amortised cost      
Transfers 2    
Stage 1 | Transfers from Stage 3 | Gross exposure | Retail mortgages      
Loans and advances at amortised cost      
Transfers 79    
Stage 1 | Transfers from Stage 3 | Gross exposure | Retail credit cards      
Loans and advances at amortised cost      
Transfers 12    
Stage 1 | Transfers from Stage 3 | Gross exposure | Retail other      
Loans and advances at amortised cost      
Transfers 23    
Stage 1 | Transfers from Stage 3 | Gross exposure | Corporate loans      
Loans and advances at amortised cost      
Transfers 207    
Stage 1 | Transfers from Stage 3 | Impairment allowance | Retail mortgages      
Loans and advances at amortised cost      
Transfers (2)    
Stage 1 | Transfers from Stage 3 | Impairment allowance | Retail credit cards      
Loans and advances at amortised cost      
Transfers (6)    
Stage 1 | Transfers from Stage 3 | Impairment allowance | Retail other      
Loans and advances at amortised cost      
Transfers (1)    
Stage 1 | Transfers from Stage 3 | Impairment allowance | Corporate loans      
Loans and advances at amortised cost      
Transfers (10)    
Stage 1 | Financial assets at amortised cost | Loans and advances      
Loans and advances at amortised cost      
Opening balance 305,836    
Closing balance 309,960   305,836
Stage 1 | Financial assets at amortised cost | Retail mortgages      
Loans and advances at amortised cost      
Opening balance 146,652    
Closing balance 152,824   146,652
Stage 1 | Financial assets at amortised cost | Retail credit cards      
Loans and advances at amortised cost      
Opening balance 30,573    
Closing balance 29,311   30,573
Stage 1 | Financial assets at amortised cost | Retail other      
Loans and advances at amortised cost      
Opening balance 12,312    
Closing balance 12,142   12,312
Stage 1 | Financial assets at amortised cost | Corporate loans      
Loans and advances at amortised cost      
Opening balance 116,299    
Closing balance 115,683   116,299
Stage 1 | Financial assets at amortised cost | ECL movement on debt securities at amortised cost      
Loans and advances at amortised cost      
Opening balance 64,976    
Closing balance 69,240   64,976
Stage 1 | Financial assets at amortised cost | Gross exposure | Loans and advances      
Loans and advances at amortised cost      
Opening balance 306,774    
Closing balance 310,773   306,774
Stage 1 | Financial assets at amortised cost | Gross exposure | Retail mortgages      
Loans and advances at amortised cost      
Opening balance 146,690    
Closing balance 152,861   146,690
Stage 1 | Financial assets at amortised cost | Gross exposure | Retail credit cards      
Loans and advances at amortised cost      
Opening balance 31,126    
Closing balance 29,768   31,126
Stage 1 | Financial assets at amortised cost | Gross exposure | Retail other      
Loans and advances at amortised cost      
Opening balance 12,450    
Closing balance 12,245   12,450
Stage 1 | Financial assets at amortised cost | Gross exposure | Corporate loans      
Loans and advances at amortised cost      
Opening balance 116,508    
Closing balance 115,899   116,508
Stage 1 | Financial assets at amortised cost | Gross exposure | ECL movement on debt securities at amortised cost      
Loans and advances at amortised cost      
Opening balance 64,988    
Closing balance 69,252   64,988
Stage 1 | Financial assets at amortised cost | Impairment allowance | Loans and advances      
Loans and advances at amortised cost      
Opening balance (938)    
Closing balance (813)   (938)
Stage 1 | Financial assets at amortised cost | Impairment allowance | Retail mortgages      
Loans and advances at amortised cost      
Opening balance (38)    
Closing balance (37)   (38)
Stage 1 | Financial assets at amortised cost | Impairment allowance | Retail credit cards      
Loans and advances at amortised cost      
Opening balance (553)    
Closing balance (457)   (553)
Stage 1 | Financial assets at amortised cost | Impairment allowance | Retail other      
Loans and advances at amortised cost      
Opening balance (138)    
Closing balance (103)   (138)
Stage 1 | Financial assets at amortised cost | Impairment allowance | Corporate loans      
Loans and advances at amortised cost      
Opening balance (209)    
Closing balance (216)   (209)
Stage 1 | Financial assets at amortised cost | Impairment allowance | ECL movement on debt securities at amortised cost      
Loans and advances at amortised cost      
Opening balance (12)    
Closing balance (12)   (12)
Lifetime expected credit losses | Stage 2 | ECL movement on loan commitments and other financial guarantees      
Loans and advances at amortised cost      
Opening balance 18,478    
Closing balance 16,815   18,478
Lifetime expected credit losses | Stage 2 | Gross exposure | Retail mortgages      
Loans and advances at amortised cost      
Opening balance 19,596    
Business activity in the period 385    
Refinements to models used for calculation 0    
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes (563)    
Final repayments (909)    
Disposals (1)    
Write-offs 0    
Closing balance 17,225   19,596
Lifetime expected credit losses | Stage 2 | Gross exposure | Retail credit cards      
Loans and advances at amortised cost      
Opening balance 5,017    
Business activity in the period 171    
Refinements to models used for calculation 0    
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes (69)    
Final repayments (11)    
Disposals 0    
Write-offs 0    
Closing balance 5,064   5,017
Lifetime expected credit losses | Stage 2 | Gross exposure | Retail other      
Loans and advances at amortised cost      
Opening balance 1,373    
Business activity in the period 180    
Refinements to models used for calculation 0    
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes (30)    
Final repayments (290)    
Disposals 0    
Write-offs 0    
Closing balance 1,600   1,373
Lifetime expected credit losses | Stage 2 | Gross exposure | Corporate loans      
Loans and advances at amortised cost      
Opening balance 11,167    
Business activity in the period 1,290    
Refinements to models used for calculation 0    
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes (732)    
Final repayments (1,585)    
Disposals (2)    
Write-offs 0    
Closing balance 10,951   11,167
Lifetime expected credit losses | Stage 2 | Gross exposure | ECL movement on loan commitments and other financial guarantees      
Loans and advances at amortised cost      
Opening balance 18,728    
Closing balance 17,054   18,728
Lifetime expected credit losses | Stage 2 | Gross exposure | ECL movement on other financial assets      
Loans and advances at amortised cost      
Opening balance 1,300    
Closing balance 900   1,300
Lifetime expected credit losses | Stage 2 | Impairment allowance      
Reconciliation of ECL movement to impairment charge/(release) for the period      
Recoveries and reimbursements (20)    
Lifetime expected credit losses | Stage 2 | Impairment allowance | Loans and advances      
Reconciliation of ECL movement to impairment charge/(release) for the period      
ECL movement 12    
Lifetime expected credit losses | Stage 2 | Impairment allowance | Retail mortgages      
Loans and advances at amortised cost      
Opening balance (62)    
Business activity in the period (2)    
Refinements to models used for calculation 0    
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes (21)    
Final repayments 3    
Disposals 1    
Write-offs 0    
Closing balance (59)   (62)
Reconciliation of ECL movement to impairment charge/(release) for the period      
ECL movement (2)    
Lifetime expected credit losses | Stage 2 | Impairment allowance | Retail credit cards      
Loans and advances at amortised cost      
Opening balance (1,247)    
Business activity in the period (38)    
Refinements to models used for calculation 47    
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes (469)    
Final repayments 2    
Disposals 0    
Write-offs 0    
Closing balance (1,192)   (1,247)
Reconciliation of ECL movement to impairment charge/(release) for the period      
ECL movement (55)    
Lifetime expected credit losses | Stage 2 | Impairment allowance | Retail other      
Loans and advances at amortised cost      
Opening balance (111)    
Business activity in the period (19)    
Refinements to models used for calculation 0    
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes (54)    
Final repayments 3    
Disposals 0    
Write-offs 0    
Closing balance (153)   (111)
Reconciliation of ECL movement to impairment charge/(release) for the period      
ECL movement 42    
Lifetime expected credit losses | Stage 2 | Impairment allowance | Corporate loans      
Loans and advances at amortised cost      
Opening balance (331)    
Business activity in the period (27)    
Refinements to models used for calculation 6    
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes (86)    
Final repayments 36    
Disposals 2    
Write-offs 0    
Closing balance (356)   (331)
Reconciliation of ECL movement to impairment charge/(release) for the period      
ECL movement 27    
Lifetime expected credit losses | Stage 2 | Impairment allowance | ECL movement on loan commitments and other financial guarantees      
Loans and advances at amortised cost      
Opening balance (250)    
Closing balance (239)   (250)
Reconciliation of ECL movement to impairment charge/(release) for the period      
ECL movement (11)    
Lifetime expected credit losses | Stage 2 | Impairment allowance | ECL movement on other financial assets      
Loans and advances at amortised cost      
Opening balance (7)    
Closing balance (4)   (7)
Reconciliation of ECL movement to impairment charge/(release) for the period      
ECL movement (3)    
Lifetime expected credit losses | Stage 2 | Impairment allowance | ECL movement on debt securities at amortised cost      
Reconciliation of ECL movement to impairment charge/(release) for the period      
ECL movement 1    
Lifetime expected credit losses | Stage 2 | Transfers from Stage 1 to Stage 2 | Gross exposure | Retail mortgages      
Loans and advances at amortised cost      
Transfers 5,409    
Lifetime expected credit losses | Stage 2 | Transfers from Stage 1 to Stage 2 | Gross exposure | Retail credit cards      
Loans and advances at amortised cost      
Transfers 2,065    
Lifetime expected credit losses | Stage 2 | Transfers from Stage 1 to Stage 2 | Gross exposure | Retail other      
Loans and advances at amortised cost      
Transfers 757    
Lifetime expected credit losses | Stage 2 | Transfers from Stage 1 to Stage 2 | Gross exposure | Corporate loans      
Loans and advances at amortised cost      
Transfers 3,210    
Lifetime expected credit losses | Stage 2 | Transfers from Stage 1 to Stage 2 | Impairment allowance | Retail mortgages      
Loans and advances at amortised cost      
Transfers (2)    
Lifetime expected credit losses | Stage 2 | Transfers from Stage 1 to Stage 2 | Impairment allowance | Retail credit cards      
Loans and advances at amortised cost      
Transfers (59)    
Lifetime expected credit losses | Stage 2 | Transfers from Stage 1 to Stage 2 | Impairment allowance | Retail other      
Loans and advances at amortised cost      
Transfers (12)    
Lifetime expected credit losses | Stage 2 | Transfers from Stage 1 to Stage 2 | Impairment allowance | Corporate loans      
Loans and advances at amortised cost      
Transfers (17)    
Lifetime expected credit losses | Stage 2 | Transfers from Stage 2 to Stage 1 | Gross exposure | Retail mortgages      
Loans and advances at amortised cost      
Transfers (6,592)    
Lifetime expected credit losses | Stage 2 | Transfers from Stage 2 to Stage 1 | Gross exposure | Retail credit cards      
Loans and advances at amortised cost      
Transfers (1,488)    
Lifetime expected credit losses | Stage 2 | Transfers from Stage 2 to Stage 1 | Gross exposure | Retail other      
Loans and advances at amortised cost      
Transfers (309)    
Lifetime expected credit losses | Stage 2 | Transfers from Stage 2 to Stage 1 | Gross exposure | Corporate loans      
Loans and advances at amortised cost      
Transfers (2,156)    
Lifetime expected credit losses | Stage 2 | Transfers from Stage 2 to Stage 1 | Impairment allowance | Retail mortgages      
Loans and advances at amortised cost      
Transfers 21    
Lifetime expected credit losses | Stage 2 | Transfers from Stage 2 to Stage 1 | Impairment allowance | Retail credit cards      
Loans and advances at amortised cost      
Transfers 306    
Lifetime expected credit losses | Stage 2 | Transfers from Stage 2 to Stage 1 | Impairment allowance | Retail other      
Loans and advances at amortised cost      
Transfers 20    
Lifetime expected credit losses | Stage 2 | Transfers from Stage 2 to Stage 1 | Impairment allowance | Corporate loans      
Loans and advances at amortised cost      
Transfers 46    
Lifetime expected credit losses | Stage 2 | Transfers to Stage 3 | Gross exposure | Retail mortgages      
Loans and advances at amortised cost      
Transfers (255)    
Lifetime expected credit losses | Stage 2 | Transfers to Stage 3 | Gross exposure | Retail credit cards      
Loans and advances at amortised cost      
Transfers (636)    
Lifetime expected credit losses | Stage 2 | Transfers to Stage 3 | Gross exposure | Retail other      
Loans and advances at amortised cost      
Transfers (84)    
Lifetime expected credit losses | Stage 2 | Transfers to Stage 3 | Gross exposure | Corporate loans      
Loans and advances at amortised cost      
Transfers (461)    
Lifetime expected credit losses | Stage 2 | Transfers to Stage 3 | Impairment allowance | Retail mortgages      
Loans and advances at amortised cost      
Transfers 4    
Lifetime expected credit losses | Stage 2 | Transfers to Stage 3 | Impairment allowance | Retail credit cards      
Loans and advances at amortised cost      
Transfers 272    
Lifetime expected credit losses | Stage 2 | Transfers to Stage 3 | Impairment allowance | Retail other      
Loans and advances at amortised cost      
Transfers 22    
Lifetime expected credit losses | Stage 2 | Transfers to Stage 3 | Impairment allowance | Corporate loans      
Loans and advances at amortised cost      
Transfers 25    
Lifetime expected credit losses | Stage 2 | Transfers from Stage 3 | Gross exposure | Retail mortgages      
Loans and advances at amortised cost      
Transfers 155    
Lifetime expected credit losses | Stage 2 | Transfers from Stage 3 | Gross exposure | Retail credit cards      
Loans and advances at amortised cost      
Transfers 15    
Lifetime expected credit losses | Stage 2 | Transfers from Stage 3 | Gross exposure | Retail other      
Loans and advances at amortised cost      
Transfers 3    
Lifetime expected credit losses | Stage 2 | Transfers from Stage 3 | Gross exposure | Corporate loans      
Loans and advances at amortised cost      
Transfers 220    
Lifetime expected credit losses | Stage 2 | Transfers from Stage 3 | Impairment allowance | Retail mortgages      
Loans and advances at amortised cost      
Transfers (1)    
Lifetime expected credit losses | Stage 2 | Transfers from Stage 3 | Impairment allowance | Retail credit cards      
Loans and advances at amortised cost      
Transfers (6)    
Lifetime expected credit losses | Stage 2 | Transfers from Stage 3 | Impairment allowance | Retail other      
Loans and advances at amortised cost      
Transfers (2)    
Lifetime expected credit losses | Stage 2 | Transfers from Stage 3 | Impairment allowance | Corporate loans      
Loans and advances at amortised cost      
Transfers (10)    
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Loans and advances      
Loans and advances at amortised cost      
Opening balance 35,402    
Closing balance 33,080   35,402
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Retail mortgages      
Loans and advances at amortised cost      
Opening balance 19,534    
Closing balance 17,166   19,534
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Retail credit cards      
Loans and advances at amortised cost      
Opening balance 3,770    
Closing balance 3,872   3,770
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Retail other      
Loans and advances at amortised cost      
Opening balance 1,262    
Closing balance 1,447   1,262
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Corporate loans      
Loans and advances at amortised cost      
Opening balance 10,836    
Closing balance 10,595   10,836
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | ECL movement on debt securities at amortised cost      
Loans and advances at amortised cost      
Opening balance 3,234    
Closing balance 696   3,234
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure | Loans and advances      
Loans and advances at amortised cost      
Opening balance 37,153    
Closing balance 34,840   37,153
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure | Retail mortgages      
Loans and advances at amortised cost      
Opening balance 19,596    
Closing balance 17,225   19,596
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure | Retail credit cards      
Loans and advances at amortised cost      
Opening balance 5,017    
Closing balance 5,064   5,017
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure | Retail other      
Loans and advances at amortised cost      
Opening balance 1,373    
Closing balance 1,600   1,373
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure | Corporate loans      
Loans and advances at amortised cost      
Opening balance 11,167    
Closing balance 10,951   11,167
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure | ECL movement on debt securities at amortised cost      
Loans and advances at amortised cost      
Opening balance 3,245    
Closing balance 708   3,245
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance | Loans and advances      
Loans and advances at amortised cost      
Opening balance (1,751)    
Closing balance (1,760)   (1,751)
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance | Retail mortgages      
Loans and advances at amortised cost      
Opening balance (62)    
Closing balance (59)   (62)
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance | Retail credit cards      
Loans and advances at amortised cost      
Opening balance (1,247)    
Closing balance (1,192)   (1,247)
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance | Retail other      
Loans and advances at amortised cost      
Opening balance (111)    
Closing balance (153)   (111)
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance | Corporate loans      
Loans and advances at amortised cost      
Opening balance (331)    
Closing balance (356)   (331)
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance | ECL movement on debt securities at amortised cost      
Loans and advances at amortised cost      
Opening balance (11)    
Closing balance (12)   (11)
Lifetime expected credit losses | Stage 3 excluding POCI | ECL movement on loan commitments and other financial guarantees      
Loans and advances at amortised cost      
Opening balance 1,143    
Closing balance 921   1,143
Lifetime expected credit losses | Stage 3 excluding POCI | Gross exposure | Retail mortgages      
Loans and advances at amortised cost      
Opening balance 1,962    
Business activity in the period 26    
Refinements to models used for calculation 0    
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes (63)    
Final repayments (193)    
Disposals (9)    
Write-offs (13)    
Closing balance 1,884   1,962
Lifetime expected credit losses | Stage 3 excluding POCI | Gross exposure | Retail credit cards      
Loans and advances at amortised cost      
Opening balance 1,903    
Business activity in the period 1    
Refinements to models used for calculation 0    
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes (200)    
Final repayments (2)    
Disposals (245)    
Write-offs (516)    
Closing balance 1,848   1,903
Lifetime expected credit losses | Stage 3 excluding POCI | Gross exposure | Retail other      
Loans and advances at amortised cost      
Opening balance 378    
Business activity in the period 11    
Refinements to models used for calculation 0    
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes 67    
Final repayments (119)    
Disposals (21)    
Write-offs (57)    
Closing balance 402   378
Lifetime expected credit losses | Stage 3 excluding POCI | Gross exposure | Corporate loans      
Loans and advances at amortised cost      
Opening balance 3,116    
Business activity in the period 373    
Refinements to models used for calculation 0    
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes (370)    
Final repayments (260)    
Disposals (121)    
Write-offs (161)    
Closing balance 2,985   3,116
Lifetime expected credit losses | Stage 3 excluding POCI | Gross exposure | ECL movement on loan commitments and other financial guarantees      
Loans and advances at amortised cost      
Opening balance 1,168    
Closing balance 943   1,168
Lifetime expected credit losses | Stage 3 excluding POCI | Impairment allowance      
Reconciliation of ECL movement to impairment charge/(release) for the period      
Recoveries and reimbursements (77)    
Lifetime expected credit losses | Stage 3 excluding POCI | Impairment allowance | Loans and advances      
Reconciliation of ECL movement to impairment charge/(release) for the period      
ECL movement 970    
Lifetime expected credit losses | Stage 3 excluding POCI | Impairment allowance | Retail mortgages      
Loans and advances at amortised cost      
Opening balance (87)    
Business activity in the period 0    
Refinements to models used for calculation 0    
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes (23)    
Final repayments 9    
Disposals 5    
Write-offs 13    
Closing balance (84)   (87)
Reconciliation of ECL movement to impairment charge/(release) for the period      
ECL movement 15    
Lifetime expected credit losses | Stage 3 excluding POCI | Impairment allowance | Retail credit cards      
Loans and advances at amortised cost      
Opening balance (1,507)    
Business activity in the period (1)    
Refinements to models used for calculation (1)    
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes (385)    
Final repayments 1    
Disposals 190    
Write-offs 516    
Closing balance (1,459)   (1,507)
Reconciliation of ECL movement to impairment charge/(release) for the period      
ECL movement 658    
Lifetime expected credit losses | Stage 3 excluding POCI | Impairment allowance | Retail other      
Loans and advances at amortised cost      
Opening balance (161)    
Business activity in the period (4)    
Refinements to models used for calculation 0    
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes (98)    
Final repayments 12    
Disposals 15    
Write-offs 57    
Closing balance (199)   (161)
Reconciliation of ECL movement to impairment charge/(release) for the period      
ECL movement 110    
Lifetime expected credit losses | Stage 3 excluding POCI | Impairment allowance | Corporate loans      
Loans and advances at amortised cost      
Opening balance (626)    
Business activity in the period (25)    
Refinements to models used for calculation 0    
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes (199)    
Final repayments 44    
Disposals 21    
Write-offs 161    
Closing balance (631)   (626)
Reconciliation of ECL movement to impairment charge/(release) for the period      
ECL movement 187    
Lifetime expected credit losses | Stage 3 excluding POCI | Impairment allowance | ECL movement on loan commitments and other financial guarantees      
Loans and advances at amortised cost      
Opening balance (25)    
Closing balance (22)   (25)
Reconciliation of ECL movement to impairment charge/(release) for the period      
ECL movement (3)    
Lifetime expected credit losses | Stage 3 excluding POCI | Impairment allowance | ECL movement on other financial assets      
Reconciliation of ECL movement to impairment charge/(release) for the period      
ECL movement (7)    
Lifetime expected credit losses | Stage 3 excluding POCI | Impairment allowance | ECL movement on debt securities at amortised cost      
Reconciliation of ECL movement to impairment charge/(release) for the period      
ECL movement 0    
Lifetime expected credit losses | Stage 3 excluding POCI | Transfers from Stage 1 to Stage 2 | Gross exposure | Retail mortgages      
Loans and advances at amortised cost      
Transfers 0    
Lifetime expected credit losses | Stage 3 excluding POCI | Transfers from Stage 1 to Stage 2 | Gross exposure | Retail credit cards      
Loans and advances at amortised cost      
Transfers 0    
Lifetime expected credit losses | Stage 3 excluding POCI | Transfers from Stage 1 to Stage 2 | Gross exposure | Retail other      
Loans and advances at amortised cost      
Transfers 0    
Lifetime expected credit losses | Stage 3 excluding POCI | Transfers from Stage 1 to Stage 2 | Gross exposure | Corporate loans      
Loans and advances at amortised cost      
Transfers 0    
Lifetime expected credit losses | Stage 3 excluding POCI | Transfers from Stage 1 to Stage 2 | Impairment allowance | Retail mortgages      
Loans and advances at amortised cost      
Transfers 0    
Lifetime expected credit losses | Stage 3 excluding POCI | Transfers from Stage 1 to Stage 2 | Impairment allowance | Retail credit cards      
Loans and advances at amortised cost      
Transfers 0    
Lifetime expected credit losses | Stage 3 excluding POCI | Transfers from Stage 1 to Stage 2 | Impairment allowance | Retail other      
Loans and advances at amortised cost      
Transfers 0    
Lifetime expected credit losses | Stage 3 excluding POCI | Transfers from Stage 1 to Stage 2 | Impairment allowance | Corporate loans      
Loans and advances at amortised cost      
Transfers 0    
Lifetime expected credit losses | Stage 3 excluding POCI | Transfers from Stage 2 to Stage 1 | Gross exposure | Retail mortgages      
Loans and advances at amortised cost      
Transfers 0    
Lifetime expected credit losses | Stage 3 excluding POCI | Transfers from Stage 2 to Stage 1 | Gross exposure | Retail credit cards      
Loans and advances at amortised cost      
Transfers 0    
Lifetime expected credit losses | Stage 3 excluding POCI | Transfers from Stage 2 to Stage 1 | Gross exposure | Retail other      
Loans and advances at amortised cost      
Transfers 0    
Lifetime expected credit losses | Stage 3 excluding POCI | Transfers from Stage 2 to Stage 1 | Gross exposure | Corporate loans      
Loans and advances at amortised cost      
Transfers 0    
Lifetime expected credit losses | Stage 3 excluding POCI | Transfers from Stage 2 to Stage 1 | Impairment allowance | Retail mortgages      
Loans and advances at amortised cost      
Transfers 0    
Lifetime expected credit losses | Stage 3 excluding POCI | Transfers from Stage 2 to Stage 1 | Impairment allowance | Retail credit cards      
Loans and advances at amortised cost      
Transfers 0    
Lifetime expected credit losses | Stage 3 excluding POCI | Transfers from Stage 2 to Stage 1 | Impairment allowance | Retail other      
Loans and advances at amortised cost      
Transfers 0    
Lifetime expected credit losses | Stage 3 excluding POCI | Transfers from Stage 2 to Stage 1 | Impairment allowance | Corporate loans      
Loans and advances at amortised cost      
Transfers 0    
Lifetime expected credit losses | Stage 3 excluding POCI | Transfers to Stage 3 | Gross exposure | Retail mortgages      
Loans and advances at amortised cost      
Transfers 408    
Lifetime expected credit losses | Stage 3 excluding POCI | Transfers to Stage 3 | Gross exposure | Retail credit cards      
Loans and advances at amortised cost      
Transfers 934    
Lifetime expected credit losses | Stage 3 excluding POCI | Transfers to Stage 3 | Gross exposure | Retail other      
Loans and advances at amortised cost      
Transfers 169    
Lifetime expected credit losses | Stage 3 excluding POCI | Transfers to Stage 3 | Gross exposure | Corporate loans      
Loans and advances at amortised cost      
Transfers 835    
Lifetime expected credit losses | Stage 3 excluding POCI | Transfers to Stage 3 | Impairment allowance | Retail mortgages      
Loans and advances at amortised cost      
Transfers (4)    
Lifetime expected credit losses | Stage 3 excluding POCI | Transfers to Stage 3 | Impairment allowance | Retail credit cards      
Loans and advances at amortised cost      
Transfers (284)    
Lifetime expected credit losses | Stage 3 excluding POCI | Transfers to Stage 3 | Impairment allowance | Retail other      
Loans and advances at amortised cost      
Transfers (23)    
Lifetime expected credit losses | Stage 3 excluding POCI | Transfers to Stage 3 | Impairment allowance | Corporate loans      
Loans and advances at amortised cost      
Transfers (27)    
Lifetime expected credit losses | Stage 3 excluding POCI | Transfers from Stage 3 | Gross exposure | Retail mortgages      
Loans and advances at amortised cost      
Transfers (234)    
Lifetime expected credit losses | Stage 3 excluding POCI | Transfers from Stage 3 | Gross exposure | Retail credit cards      
Loans and advances at amortised cost      
Transfers (27)    
Lifetime expected credit losses | Stage 3 excluding POCI | Transfers from Stage 3 | Gross exposure | Retail other      
Loans and advances at amortised cost      
Transfers (26)    
Lifetime expected credit losses | Stage 3 excluding POCI | Transfers from Stage 3 | Gross exposure | Corporate loans      
Loans and advances at amortised cost      
Transfers (427)    
Lifetime expected credit losses | Stage 3 excluding POCI | Transfers from Stage 3 | Impairment allowance | Retail mortgages      
Loans and advances at amortised cost      
Transfers 3    
Lifetime expected credit losses | Stage 3 excluding POCI | Transfers from Stage 3 | Impairment allowance | Retail credit cards      
Loans and advances at amortised cost      
Transfers 12    
Lifetime expected credit losses | Stage 3 excluding POCI | Transfers from Stage 3 | Impairment allowance | Retail other      
Loans and advances at amortised cost      
Transfers 3    
Lifetime expected credit losses | Stage 3 excluding POCI | Transfers from Stage 3 | Impairment allowance | Corporate loans      
Loans and advances at amortised cost      
Transfers 20    
Lifetime expected credit losses | Stage 3 excluding POCI | Financial assets at amortised cost | Loans and advances      
Loans and advances at amortised cost      
Opening balance 4,978    
Closing balance 4,746   4,978
Lifetime expected credit losses | Stage 3 excluding POCI | Financial assets at amortised cost | Retail mortgages      
Loans and advances at amortised cost      
Opening balance 1,875    
Closing balance 1,800   1,875
Lifetime expected credit losses | Stage 3 excluding POCI | Financial assets at amortised cost | Retail credit cards      
Loans and advances at amortised cost      
Opening balance 396    
Closing balance 389   396
Lifetime expected credit losses | Stage 3 excluding POCI | Financial assets at amortised cost | Retail other      
Loans and advances at amortised cost      
Opening balance 217    
Closing balance 203   217
Lifetime expected credit losses | Stage 3 excluding POCI | Financial assets at amortised cost | Corporate loans      
Loans and advances at amortised cost      
Opening balance 2,490    
Closing balance 2,354   2,490
Lifetime expected credit losses | Stage 3 excluding POCI | Financial assets at amortised cost | ECL movement on debt securities at amortised cost      
Loans and advances at amortised cost      
Opening balance 0    
Closing balance 0   0
Lifetime expected credit losses | Stage 3 excluding POCI | Financial assets at amortised cost | Gross exposure | Loans and advances      
Loans and advances at amortised cost      
Opening balance 7,359    
Closing balance 7,119   7,359
Lifetime expected credit losses | Stage 3 excluding POCI | Financial assets at amortised cost | Gross exposure | Retail mortgages      
Loans and advances at amortised cost      
Opening balance 1,962    
Closing balance 1,884   1,962
Lifetime expected credit losses | Stage 3 excluding POCI | Financial assets at amortised cost | Gross exposure | Retail credit cards      
Loans and advances at amortised cost      
Opening balance 1,903    
Closing balance 1,848   1,903
Lifetime expected credit losses | Stage 3 excluding POCI | Financial assets at amortised cost | Gross exposure | Retail other      
Loans and advances at amortised cost      
Opening balance 378    
Closing balance 402   378
Lifetime expected credit losses | Stage 3 excluding POCI | Financial assets at amortised cost | Gross exposure | Corporate loans      
Loans and advances at amortised cost      
Opening balance 3,116    
Closing balance 2,985   3,116
Lifetime expected credit losses | Stage 3 excluding POCI | Financial assets at amortised cost | Gross exposure | ECL movement on debt securities at amortised cost      
Loans and advances at amortised cost      
Opening balance 0    
Closing balance 0   0
Lifetime expected credit losses | Stage 3 excluding POCI | Financial assets at amortised cost | Impairment allowance | Loans and advances      
Loans and advances at amortised cost      
Opening balance (2,381)    
Closing balance (2,373)   (2,381)
Lifetime expected credit losses | Stage 3 excluding POCI | Financial assets at amortised cost | Impairment allowance | Retail mortgages      
Loans and advances at amortised cost      
Opening balance (87)    
Closing balance (84)   (87)
Lifetime expected credit losses | Stage 3 excluding POCI | Financial assets at amortised cost | Impairment allowance | Retail credit cards      
Loans and advances at amortised cost      
Opening balance (1,507)    
Closing balance (1,459)   (1,507)
Lifetime expected credit losses | Stage 3 excluding POCI | Financial assets at amortised cost | Impairment allowance | Retail other      
Loans and advances at amortised cost      
Opening balance (161)    
Closing balance (199)   (161)
Lifetime expected credit losses | Stage 3 excluding POCI | Financial assets at amortised cost | Impairment allowance | Corporate loans      
Loans and advances at amortised cost      
Opening balance (626)    
Closing balance (631)   (626)
Lifetime expected credit losses | Stage 3 excluding POCI | Financial assets at amortised cost | Impairment allowance | ECL movement on debt securities at amortised cost      
Loans and advances at amortised cost      
Opening balance 0    
Closing balance 0   0
Lifetime expected credit losses | Stage 3 POCI | ECL movement on loan commitments and other financial guarantees      
Loans and advances at amortised cost      
Opening balance 6    
Closing balance 5   6
Lifetime expected credit losses | Stage 3 POCI | Gross exposure | Retail mortgages      
Loans and advances at amortised cost      
Opening balance 0    
Business activity in the period 0    
Refinements to models used for calculation 0    
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes 0    
Final repayments 0    
Disposals 0    
Write-offs 0    
Closing balance 0   0
Lifetime expected credit losses | Stage 3 POCI | Gross exposure | Retail credit cards      
Loans and advances at amortised cost      
Opening balance 40    
Business activity in the period 0    
Refinements to models used for calculation 0    
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes (12)    
Final repayments 0    
Disposals 0    
Write-offs 0    
Closing balance 28   40
Lifetime expected credit losses | Stage 3 POCI | Gross exposure | Retail other      
Loans and advances at amortised cost      
Opening balance 17    
Business activity in the period 0    
Refinements to models used for calculation 0    
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes (3)    
Final repayments 0    
Disposals 0    
Write-offs 0    
Closing balance 14   17
Lifetime expected credit losses | Stage 3 POCI | Gross exposure | Corporate loans      
Loans and advances at amortised cost      
Opening balance 0    
Business activity in the period 0    
Refinements to models used for calculation 0    
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes 0    
Final repayments 0    
Disposals 0    
Write-offs 0    
Closing balance 0   0
Lifetime expected credit losses | Stage 3 POCI | Gross exposure | ECL movement on loan commitments and other financial guarantees      
Loans and advances at amortised cost      
Opening balance 6    
Closing balance 5   6
Lifetime expected credit losses | Stage 3 POCI | Impairment allowance      
Reconciliation of ECL movement to impairment charge/(release) for the period      
Recoveries and reimbursements 0    
Lifetime expected credit losses | Stage 3 POCI | Impairment allowance | Loans and advances      
Reconciliation of ECL movement to impairment charge/(release) for the period      
ECL movement 0    
Lifetime expected credit losses | Stage 3 POCI | Impairment allowance | Retail mortgages      
Loans and advances at amortised cost      
Opening balance 0    
Business activity in the period 0    
Refinements to models used for calculation 0    
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes 0    
Final repayments 0    
Disposals 0    
Write-offs 0    
Closing balance 0   0
Reconciliation of ECL movement to impairment charge/(release) for the period      
ECL movement 0    
Lifetime expected credit losses | Stage 3 POCI | Impairment allowance | Retail credit cards      
Loans and advances at amortised cost      
Opening balance 0    
Business activity in the period 0    
Refinements to models used for calculation 0    
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes 0    
Final repayments 0    
Disposals 0    
Write-offs 0    
Closing balance 0   0
Reconciliation of ECL movement to impairment charge/(release) for the period      
ECL movement 0    
Lifetime expected credit losses | Stage 3 POCI | Impairment allowance | Retail other      
Loans and advances at amortised cost      
Opening balance 0    
Business activity in the period 0    
Refinements to models used for calculation 0    
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes 0    
Final repayments 0    
Disposals 0    
Write-offs 0    
Closing balance 0   0
Reconciliation of ECL movement to impairment charge/(release) for the period      
ECL movement 0    
Lifetime expected credit losses | Stage 3 POCI | Impairment allowance | Corporate loans      
Loans and advances at amortised cost      
Opening balance 0    
Business activity in the period 0    
Refinements to models used for calculation 0    
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes 0    
Final repayments 0    
Disposals 0    
Write-offs 0    
Closing balance 0   0
Reconciliation of ECL movement to impairment charge/(release) for the period      
ECL movement 0    
Lifetime expected credit losses | Stage 3 POCI | Impairment allowance | ECL movement on loan commitments and other financial guarantees      
Loans and advances at amortised cost      
Opening balance 0    
Closing balance 0   0
Reconciliation of ECL movement to impairment charge/(release) for the period      
ECL movement 0    
Lifetime expected credit losses | Stage 3 POCI | Impairment allowance | ECL movement on other financial assets      
Reconciliation of ECL movement to impairment charge/(release) for the period      
ECL movement 0    
Lifetime expected credit losses | Stage 3 POCI | Impairment allowance | ECL movement on debt securities at amortised cost      
Reconciliation of ECL movement to impairment charge/(release) for the period      
ECL movement 0    
Lifetime expected credit losses | Stage 3 POCI | Transfers from Stage 1 to Stage 2 | Gross exposure | Retail mortgages      
Loans and advances at amortised cost      
Transfers 0    
Lifetime expected credit losses | Stage 3 POCI | Transfers from Stage 1 to Stage 2 | Gross exposure | Retail credit cards      
Loans and advances at amortised cost      
Transfers 0    
Lifetime expected credit losses | Stage 3 POCI | Transfers from Stage 1 to Stage 2 | Gross exposure | Retail other      
Loans and advances at amortised cost      
Transfers 0    
Lifetime expected credit losses | Stage 3 POCI | Transfers from Stage 1 to Stage 2 | Gross exposure | Corporate loans      
Loans and advances at amortised cost      
Transfers 0    
Lifetime expected credit losses | Stage 3 POCI | Transfers from Stage 1 to Stage 2 | Impairment allowance | Retail mortgages      
Loans and advances at amortised cost      
Transfers 0    
Lifetime expected credit losses | Stage 3 POCI | Transfers from Stage 1 to Stage 2 | Impairment allowance | Retail credit cards      
Loans and advances at amortised cost      
Transfers 0    
Lifetime expected credit losses | Stage 3 POCI | Transfers from Stage 1 to Stage 2 | Impairment allowance | Retail other      
Loans and advances at amortised cost      
Transfers 0    
Lifetime expected credit losses | Stage 3 POCI | Transfers from Stage 1 to Stage 2 | Impairment allowance | Corporate loans      
Loans and advances at amortised cost      
Transfers 0    
Lifetime expected credit losses | Stage 3 POCI | Transfers from Stage 2 to Stage 1 | Gross exposure | Retail mortgages      
Loans and advances at amortised cost      
Transfers 0    
Lifetime expected credit losses | Stage 3 POCI | Transfers from Stage 2 to Stage 1 | Gross exposure | Retail credit cards      
Loans and advances at amortised cost      
Transfers 0    
Lifetime expected credit losses | Stage 3 POCI | Transfers from Stage 2 to Stage 1 | Gross exposure | Retail other      
Loans and advances at amortised cost      
Transfers 0    
Lifetime expected credit losses | Stage 3 POCI | Transfers from Stage 2 to Stage 1 | Gross exposure | Corporate loans      
Loans and advances at amortised cost      
Transfers 0    
Lifetime expected credit losses | Stage 3 POCI | Transfers from Stage 2 to Stage 1 | Impairment allowance | Retail mortgages      
Loans and advances at amortised cost      
Transfers 0    
Lifetime expected credit losses | Stage 3 POCI | Transfers from Stage 2 to Stage 1 | Impairment allowance | Retail credit cards      
Loans and advances at amortised cost      
Transfers 0    
Lifetime expected credit losses | Stage 3 POCI | Transfers from Stage 2 to Stage 1 | Impairment allowance | Retail other      
Loans and advances at amortised cost      
Transfers 0    
Lifetime expected credit losses | Stage 3 POCI | Transfers from Stage 2 to Stage 1 | Impairment allowance | Corporate loans      
Loans and advances at amortised cost      
Transfers 0    
Lifetime expected credit losses | Stage 3 POCI | Transfers to Stage 3 | Gross exposure | Retail mortgages      
Loans and advances at amortised cost      
Transfers 0    
Lifetime expected credit losses | Stage 3 POCI | Transfers to Stage 3 | Gross exposure | Retail credit cards      
Loans and advances at amortised cost      
Transfers 0    
Lifetime expected credit losses | Stage 3 POCI | Transfers to Stage 3 | Gross exposure | Retail other      
Loans and advances at amortised cost      
Transfers 0    
Lifetime expected credit losses | Stage 3 POCI | Transfers to Stage 3 | Gross exposure | Corporate loans      
Loans and advances at amortised cost      
Transfers 0    
Lifetime expected credit losses | Stage 3 POCI | Transfers to Stage 3 | Impairment allowance | Retail mortgages      
Loans and advances at amortised cost      
Transfers 0    
Lifetime expected credit losses | Stage 3 POCI | Transfers to Stage 3 | Impairment allowance | Retail credit cards      
Loans and advances at amortised cost      
Transfers 0    
Lifetime expected credit losses | Stage 3 POCI | Transfers to Stage 3 | Impairment allowance | Retail other      
Loans and advances at amortised cost      
Transfers 0    
Lifetime expected credit losses | Stage 3 POCI | Transfers to Stage 3 | Impairment allowance | Corporate loans      
Loans and advances at amortised cost      
Transfers 0    
Lifetime expected credit losses | Stage 3 POCI | Transfers from Stage 3 | Gross exposure | Retail mortgages      
Loans and advances at amortised cost      
Transfers 0    
Lifetime expected credit losses | Stage 3 POCI | Transfers from Stage 3 | Gross exposure | Retail credit cards      
Loans and advances at amortised cost      
Transfers 0    
Lifetime expected credit losses | Stage 3 POCI | Transfers from Stage 3 | Gross exposure | Retail other      
Loans and advances at amortised cost      
Transfers 0    
Lifetime expected credit losses | Stage 3 POCI | Transfers from Stage 3 | Gross exposure | Corporate loans      
Loans and advances at amortised cost      
Transfers 0    
Lifetime expected credit losses | Stage 3 POCI | Transfers from Stage 3 | Impairment allowance | Retail mortgages      
Loans and advances at amortised cost      
Transfers 0    
Lifetime expected credit losses | Stage 3 POCI | Transfers from Stage 3 | Impairment allowance | Retail credit cards      
Loans and advances at amortised cost      
Transfers 0    
Lifetime expected credit losses | Stage 3 POCI | Transfers from Stage 3 | Impairment allowance | Retail other      
Loans and advances at amortised cost      
Transfers 0    
Lifetime expected credit losses | Stage 3 POCI | Transfers from Stage 3 | Impairment allowance | Corporate loans      
Loans and advances at amortised cost      
Transfers 0    
Lifetime expected credit losses | Stage 3 POCI | Financial assets at amortised cost | Loans and advances      
Loans and advances at amortised cost      
Opening balance 57    
Closing balance 42   57
Lifetime expected credit losses | Stage 3 POCI | Financial assets at amortised cost | Retail mortgages      
Loans and advances at amortised cost      
Opening balance 0    
Closing balance 0   0
Lifetime expected credit losses | Stage 3 POCI | Financial assets at amortised cost | Retail credit cards      
Loans and advances at amortised cost      
Opening balance 40    
Closing balance 28   40
Lifetime expected credit losses | Stage 3 POCI | Financial assets at amortised cost | Retail other      
Loans and advances at amortised cost      
Opening balance 17    
Closing balance 14   17
Lifetime expected credit losses | Stage 3 POCI | Financial assets at amortised cost | Corporate loans      
Loans and advances at amortised cost      
Opening balance 0    
Closing balance 0   0
Lifetime expected credit losses | Stage 3 POCI | Financial assets at amortised cost | ECL movement on debt securities at amortised cost      
Loans and advances at amortised cost      
Opening balance 0    
Closing balance 0   0
Lifetime expected credit losses | Stage 3 POCI | Financial assets at amortised cost | Gross exposure | Loans and advances      
Loans and advances at amortised cost      
Opening balance 57    
Closing balance 42   57
Lifetime expected credit losses | Stage 3 POCI | Financial assets at amortised cost | Gross exposure | Retail mortgages      
Loans and advances at amortised cost      
Opening balance 0    
Closing balance 0   0
Lifetime expected credit losses | Stage 3 POCI | Financial assets at amortised cost | Gross exposure | Retail credit cards      
Loans and advances at amortised cost      
Opening balance 40    
Closing balance 28   40
Lifetime expected credit losses | Stage 3 POCI | Financial assets at amortised cost | Gross exposure | Retail other      
Loans and advances at amortised cost      
Opening balance 17    
Closing balance 14   17
Lifetime expected credit losses | Stage 3 POCI | Financial assets at amortised cost | Gross exposure | Corporate loans      
Loans and advances at amortised cost      
Opening balance 0    
Closing balance 0   0
Lifetime expected credit losses | Stage 3 POCI | Financial assets at amortised cost | Gross exposure | ECL movement on debt securities at amortised cost      
Loans and advances at amortised cost      
Opening balance 0    
Closing balance 0   0
Lifetime expected credit losses | Stage 3 POCI | Financial assets at amortised cost | Impairment allowance | Loans and advances      
Loans and advances at amortised cost      
Opening balance 0    
Closing balance 0   0
Lifetime expected credit losses | Stage 3 POCI | Financial assets at amortised cost | Impairment allowance | Retail mortgages      
Loans and advances at amortised cost      
Opening balance 0    
Closing balance 0   0
Lifetime expected credit losses | Stage 3 POCI | Financial assets at amortised cost | Impairment allowance | Retail credit cards      
Loans and advances at amortised cost      
Opening balance 0    
Closing balance 0   0
Lifetime expected credit losses | Stage 3 POCI | Financial assets at amortised cost | Impairment allowance | Retail other      
Loans and advances at amortised cost      
Opening balance 0    
Closing balance 0   0
Lifetime expected credit losses | Stage 3 POCI | Financial assets at amortised cost | Impairment allowance | Corporate loans      
Loans and advances at amortised cost      
Opening balance 0    
Closing balance 0   0
Lifetime expected credit losses | Stage 3 POCI | Financial assets at amortised cost | Impairment allowance | ECL movement on debt securities at amortised cost      
Loans and advances at amortised cost      
Opening balance 0    
Closing balance £ 0   £ 0