v3.26.1
Report of the directors financial review risk report - Reconciliation of changes in gross carrying/nominal amount and allowances for loans and advances to banks and customers including loan commitments and financial guarantees (Details)
£ in Millions, $ in Millions
6 Months Ended 12 Months Ended
Jun. 30, 2026
USD ($)
Jun. 30, 2026
GBP (£)
Dec. 31, 2025
USD ($)
Financial assets at amortised cost, category      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance $ 182,089    
Financial assets, ending balance 218,320   $ 182,089
Debt instruments at FVOCI      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 386,370    
Financial assets, ending balance 391,385   386,370
Financial instruments including loan commitments and financial guarantees      
Increase (decrease) in financial assets [abstract]      
Increase (decrease) in ECL 2,353   3,850
Loans and advances to bank and customers including loan commitments and financial guarantees      
Increase (decrease) in financial assets [abstract]      
Increase (decrease) in ECL     3,885
Other financial assets measured at amortised cost | Financial assets at amortised cost, category      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 890,197    
Financial assets, ending balance 965,673   890,197
Debt securities in issue | Financial assets at amortised cost, category      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 158,644    
Financial assets, ending balance 200,825   158,644
Debt securities in issue | Debt instruments at FVOCI      
Increase (decrease) in financial assets [abstract]      
Increase (decrease) in ECL (1)   (18)
Loans and advances to customers      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 988,399    
Financial assets, ending balance 1,022,105   988,399
Loans and advances to customers | Financial assets at amortised cost, category      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 988,399    
Financial assets, ending balance 1,022,105   988,399
Loans and advances to banks      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 108,462    
Financial assets, ending balance 110,529   108,462
Loans and advances to banks | Financial assets at amortised cost, category      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 108,462    
Financial assets, ending balance 110,529   108,462
IFRS 9 | Financial instruments including loan commitments and financial guarantees      
Increase (decrease) in financial assets [abstract]      
Increase (decrease) in ECL 2,354   3,868
IFRS 9 | Other financial assets measured at amortised cost | Financial assets at amortised cost, category      
Increase (decrease) in financial assets [abstract]      
Increase (decrease) in ECL 24   29
IFRS 9 | Performance and other guarantees not considered for IFRS 9      
Increase (decrease) in financial assets [abstract]      
Increase (decrease) in ECL (54)   (46)
Stage 1 | Non-credit impaired | Other financial assets measured at amortised cost | Financial assets at amortised cost, category      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 888,415    
Financial assets, ending balance 963,615   888,415
Stage 1 | Non-credit impaired | Debt securities in issue | Debt instruments at FVOCI      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 385,476    
Financial assets, ending balance 390,733   385,476
Stage 1 | Non-credit impaired | Loans and advances to customers | Financial assets at amortised cost, category      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 892,232    
Financial assets, ending balance 922,567   892,232
Stage 1 | Non-credit impaired | Loans and advances to banks | Financial assets at amortised cost, category      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 108,332    
Financial assets, ending balance 110,251   108,332
Stage 2 | Non-credit impaired | Other financial assets measured at amortised cost | Financial assets at amortised cost, category      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 1,640    
Financial assets, ending balance 1,835   1,640
Stage 2 | Non-credit impaired | Debt securities in issue | Debt instruments at FVOCI      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 894    
Financial assets, ending balance 652   894
Stage 2 | Non-credit impaired | Loans and advances to customers | Financial assets at amortised cost, category      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 78,618    
Financial assets, ending balance 83,260   78,618
Stage 2 | Non-credit impaired | Loans and advances to banks | Financial assets at amortised cost, category      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 130    
Financial assets, ending balance 278   130
Stage 2 | Credit impaired | Other financial assets measured at amortised cost | Financial assets at amortised cost, category      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 142    
Financial assets, ending balance 217   142
Stage 2 | Credit impaired | Debt securities in issue | Debt instruments at FVOCI      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 0    
Financial assets, ending balance 0   0
Stage 2 | Credit impaired | Loans and advances to customers | Financial assets at amortised cost, category      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 17,292    
Financial assets, ending balance 16,018   17,292
Stage 2 | Credit impaired | Loans and advances to banks | Financial assets at amortised cost, category      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 0    
Financial assets, ending balance 0   0
Stage 2 | – POCI | Other financial assets measured at amortised cost | Financial assets at amortised cost, category      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 0    
Financial assets, ending balance 6   0
Stage 2 | – POCI | Debt securities in issue | Debt instruments at FVOCI      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 0    
Financial assets, ending balance 0   0
Stage 2 | – POCI | Loans and advances to customers | Financial assets at amortised cost, category      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 257    
Financial assets, ending balance 260   257
Stage 2 | – POCI | Loans and advances to banks | Financial assets at amortised cost, category      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 0    
Financial assets, ending balance 0   0
Gross carrying amount | Wholesale      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 2,064,949    
Financial assets, ending balance 2,120,017   2,064,949
Gross carrying amount | Financial assets at amortised cost, category      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 2,706,154    
Financial assets, ending balance 2,907,516   2,706,154
Gross carrying amount | Debt instruments at FVOCI      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 386,400    
Financial assets, ending balance 391,414   386,400
Gross carrying amount | Loans and advances to bank and customers including loan commitments and financial guarantees      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 1,740,456   1,629,501
Changes due to modifications not derecognised (8)   0
Net new and further lending/ repayments 67,853   66,068
Assets written off (1,462)   (3,569)
Credit-related modifications that resulted in derecognition | £   £ 0  
Foreign exchange and others (18,078)   48,544
Financial assets, ending balance 1,788,761   1,740,456
Gross carrying amount | Loans and advances to bank and customers including loan commitments and financial guarantees | Assets held for sale      
Increase (decrease) in financial assets [abstract]      
Other (4,700)   (6,000)
Gross carrying amount | Loans and advances to bank and customers including loan commitments and financial guarantees | Assets held for sale | French Retained Home And Other Loan Portfolio      
Increase (decrease) in financial assets [abstract]      
Other     (7,200)
Gross carrying amount | Other financial assets measured at amortised cost | Financial assets at amortised cost, category      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 890,326    
Financial assets, ending balance 965,830   890,326
Gross carrying amount | Debt securities in issue | Debt instruments at FVOCI      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 383,568    
Financial assets, ending balance 386,831   383,568
Gross carrying amount | Loans and advances to customers | Financial assets at amortised cost, category      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 999,091    
Financial assets, ending balance 1,033,846   999,091
Gross carrying amount | Loans and advances to banks | Financial assets at amortised cost, category      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 108,469    
Financial assets, ending balance 110,539   108,469
Gross carrying amount | IFRS 9 | Financial instruments including loan commitments and financial guarantees      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 2,706,154    
Financial assets, ending balance 2,907,516   2,706,154
Gross carrying amount | IFRS 9 | Non-trading reverse purchase agreement commitments      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 75,372    
Financial assets, ending balance 152,925   75,372
Gross carrying amount | IFRS 9 | Other financial assets measured at amortised cost | Financial assets at amortised cost, category      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 890,326    
Financial assets, ending balance 965,830   890,326
Gross carrying amount | Stage 1 | Non-credit impaired | Wholesale      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 1,940,746    
Financial assets, ending balance 1,978,717   1,940,746
Gross carrying amount | Stage 1 | Non-credit impaired | Financial assets at amortised cost, category      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 2,575,821    
Financial assets, ending balance 2,771,827   2,575,821
Gross carrying amount | Stage 1 | Non-credit impaired | Loans and advances to bank and customers including loan commitments and financial guarantees      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 1,611,996   1,489,687
Transfers of financial instruments: (29,667)   (28,196)
– transfers from stage 1 to stage 2 (68,168)   (134,309)
– transfers from stage 2 to stage 1 39,640   107,223
– transfers to stage 3 (1,495)   (1,873)
– transfers from stage 3 356   763
Net new and further lending/ repayments 89,882   107,733
Foreign exchange and others (16,975)   42,772
Financial assets, ending balance 1,655,236   1,611,996
Gross carrying amount | Stage 1 | Non-credit impaired | Other financial assets measured at amortised cost | Financial assets at amortised cost, category      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 888,491    
Financial assets, ending balance 963,708   888,491
Gross carrying amount | Stage 1 | Non-credit impaired | Debt securities in issue | Debt instruments at FVOCI      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 385,504    
Financial assets, ending balance 390,760   385,504
Gross carrying amount | Stage 1 | Non-credit impaired | Loans and advances to customers | Financial assets at amortised cost, category      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 893,433    
Financial assets, ending balance 923,849   893,433
Gross carrying amount | Stage 1 | Non-credit impaired | Loans and advances to banks | Financial assets at amortised cost, category      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 108,336    
Financial assets, ending balance 110,258   108,336
Gross carrying amount | Stage 2 | Non-credit impaired | Wholesale      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 124,203    
Financial assets, ending balance 141,299   124,203
Gross carrying amount | Stage 2 | Non-credit impaired | Financial assets at amortised cost, category      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 104,578    
Financial assets, ending balance 109,875   104,578
Gross carrying amount | Stage 2 | Non-credit impaired | Loans and advances to bank and customers including loan commitments and financial guarantees      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 102,889   115,898
Transfers of financial instruments: 25,690   18,327
– transfers from stage 1 to stage 2 68,168   134,309
– transfers from stage 2 to stage 1 (39,640)   (107,223)
– transfers to stage 3 (3,335)   (10,260)
– transfers from stage 3 497   1,501
Net new and further lending/ repayments (19,543)   (35,843)
Foreign exchange and others (1,057)   4,507
Financial assets, ending balance 107,979   102,889
Gross carrying amount | Stage 2 | Non-credit impaired | Other financial assets measured at amortised cost | Financial assets at amortised cost, category      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 1,651    
Financial assets, ending balance 1,854   1,651
Gross carrying amount | Stage 2 | Non-credit impaired | Debt securities in issue | Debt instruments at FVOCI      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 896    
Financial assets, ending balance 654   896
Gross carrying amount | Stage 2 | Non-credit impaired | Loans and advances to customers | Financial assets at amortised cost, category      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 80,936    
Financial assets, ending balance 85,657   80,936
Gross carrying amount | Stage 2 | Non-credit impaired | Loans and advances to banks | Financial assets at amortised cost, category      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 132    
Financial assets, ending balance 280   132
Gross carrying amount | Stage 2 | Credit impaired | Financial assets at amortised cost, category      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 25,418    
Financial assets, ending balance 25,468   25,418
Gross carrying amount | Stage 2 | Credit impaired | Loans and advances to bank and customers including loan commitments and financial guarantees      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 25,234   23,823
Transfers of financial instruments: 3,977   9,869
– transfers to stage 3 4,830   12,133
– transfers from stage 3 (853)   (2,264)
Changes due to modifications not derecognised (8)   0
Net new and further lending/ repayments (2,488)   (6,060)
Assets written off (1,462)   (3,569)
Credit-related modifications that resulted in derecognition | £   0  
Foreign exchange and others (47)   1,259
Financial assets, ending balance 25,206   25,234
Gross carrying amount | Stage 2 | Credit impaired | Other financial assets measured at amortised cost | Financial assets at amortised cost, category      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 184    
Financial assets, ending balance 262   184
Gross carrying amount | Stage 2 | Credit impaired | Debt securities in issue | Debt instruments at FVOCI      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 0    
Financial assets, ending balance 0   0
Gross carrying amount | Stage 2 | Credit impaired | Loans and advances to customers | Financial assets at amortised cost, category      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 24,389    
Financial assets, ending balance 24,004   24,389
Gross carrying amount | Stage 2 | Credit impaired | Loans and advances to banks | Financial assets at amortised cost, category      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 1    
Financial assets, ending balance 1   1
Gross carrying amount | Stage 2 | – POCI | Financial assets at amortised cost, category      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 337    
Financial assets, ending balance 346   337
Gross carrying amount | Stage 2 | – POCI | Loans and advances to bank and customers including loan commitments and financial guarantees      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 337   93
Net new and further lending/ repayments 2   238
Foreign exchange and others 1   6
Financial assets, ending balance 340   337
Gross carrying amount | Stage 2 | – POCI | Other financial assets measured at amortised cost | Financial assets at amortised cost, category      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 0    
Financial assets, ending balance 6   0
Gross carrying amount | Stage 2 | – POCI | Debt securities in issue | Debt instruments at FVOCI      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 0    
Financial assets, ending balance 0   0
Gross carrying amount | Stage 2 | – POCI | Loans and advances to customers | Financial assets at amortised cost, category      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 333    
Financial assets, ending balance 336   333
Gross carrying amount | Stage 2 | – POCI | Loans and advances to banks | Financial assets at amortised cost, category      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 0    
Financial assets, ending balance 0   0
Allowance for ECL      
Increase (decrease) in financial assets [abstract]      
ECL income statement change for the period (5,000)   (4,900)
Allowance for ECL | Wholesale      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance (1,905)    
Financial assets, ending balance (2,105)   (1,905)
ECL income statement change for the period (2,100)   (2,000)
Allowance for ECL | Financial assets at amortised cost, category      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance (11,194)    
Financial assets, ending balance (12,363)   (11,194)
Allowance for ECL | Debt instruments at FVOCI      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance (30)    
Financial assets, ending balance (29)   (30)
Allowance for ECL | Financial instruments including loan commitments and financial guarantees      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance (11,224)    
Financial assets, ending balance (12,392)   (11,224)
Allowance for ECL | Loans and advances to bank and customers including loan commitments and financial guarantees      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance (11,065)   (10,105)
Net remeasurement of ECL arising from transfer of stage (75)   2
Net new and further lending/ repayments 754   1,206
Changes to risk parameters – credit quality (3,099)   (5,362)
Changes to models used for ECL calculation 24   197
Assets written off 1,462   3,569
Credit-related modifications that resulted in derecognition   0 9
Foreign exchange and others (161)   (581)
Financial assets, ending balance (12,206)   (11,065)
ECL income statement change for the period 2,442   3,957
Recoveries 196   320
Other (138)   (248)
Increase (decrease) in ECL (2,384)    
Allowance for ECL | Loans and advances to bank and customers including loan commitments and financial guarantees | Assets held for sale      
Increase (decrease) in financial assets [abstract]      
Other 52   27
Allowance for ECL | Loans and advances to bank and customers including loan commitments and financial guarantees | Assets held for sale | French Retained Home And Other Loan Portfolio      
Increase (decrease) in financial assets [abstract]      
Other     7
Allowance for ECL | Other financial assets measured at amortised cost | Financial assets at amortised cost, category      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance (129)    
Financial assets, ending balance (157)   (129)
Allowance for ECL | Debt securities in issue | Debt instruments at FVOCI      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance (30)    
Financial assets, ending balance (29)   (30)
Allowance for ECL | Loans and advances to customers | Financial assets at amortised cost, category      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance (10,692)    
Financial assets, ending balance (11,741)   (10,692)
Allowance for ECL | Loans and advances to banks | Financial assets at amortised cost, category      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance (7)    
Financial assets, ending balance (10)   (7)
Allowance for ECL | IFRS 9 | Financial instruments including loan commitments and financial guarantees      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance (11,194)    
Financial assets, ending balance (12,363)   (11,194)
Allowance for ECL | IFRS 9 | Other financial assets measured at amortised cost | Financial assets at amortised cost, category      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance (129)    
Financial assets, ending balance (157)   (129)
Allowance for ECL | Stage 1 | Non-credit impaired | Wholesale      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance (690)    
Financial assets, ending balance (799)   (690)
Allowance for ECL | Stage 1 | Non-credit impaired | Financial assets at amortised cost, category      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance (1,438)    
Financial assets, ending balance (1,549)   (1,438)
Allowance for ECL | Stage 1 | Non-credit impaired | Loans and advances to bank and customers including loan commitments and financial guarantees      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance (1,362)   (1,232)
Transfers of financial instruments: (335)   (931)
– transfers from stage 1 to stage 2 205   368
– transfers from stage 2 to stage 1 (515)   (1,233)
– transfers to stage 3 7   15
– transfers from stage 3 (32)   (81)
Net remeasurement of ECL arising from transfer of stage 290   664
Net new and further lending/ repayments (99)   (178)
Changes to risk parameters – credit quality 30   390
Changes to models used for ECL calculation 3   (59)
Foreign exchange and others 17   (16)
Financial assets, ending balance (1,456)   (1,362)
ECL income statement change for the period (224)   (817)
Allowance for ECL | Stage 1 | Non-credit impaired | Other financial assets measured at amortised cost | Financial assets at amortised cost, category      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance (76)    
Financial assets, ending balance (93)   (76)
Allowance for ECL | Stage 1 | Non-credit impaired | Debt securities in issue | Debt instruments at FVOCI      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance (28)    
Financial assets, ending balance (27)   (28)
Allowance for ECL | Stage 1 | Non-credit impaired | Loans and advances to customers | Financial assets at amortised cost, category      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance (1,201)    
Financial assets, ending balance (1,282)   (1,201)
Allowance for ECL | Stage 1 | Non-credit impaired | Loans and advances to banks | Financial assets at amortised cost, category      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance (4)    
Financial assets, ending balance (7)   (4)
Allowance for ECL | Stage 2 | Non-credit impaired | Wholesale      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance (1,214)    
Financial assets, ending balance (1,307)   (1,214)
Allowance for ECL | Stage 2 | Non-credit impaired | Financial assets at amortised cost, category      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance (2,445)    
Financial assets, ending balance (2,533)   (2,445)
Allowance for ECL | Stage 2 | Non-credit impaired | Loans and advances to bank and customers including loan commitments and financial guarantees      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance (2,434)   (2,674)
Transfers of financial instruments: 716   2,101
– transfers from stage 1 to stage 2 (205)   (368)
– transfers from stage 2 to stage 1 515   1,233
– transfers to stage 3 500   1,434
– transfers from stage 3 (94)   (198)
Net remeasurement of ECL arising from transfer of stage (307)   (604)
Net new and further lending/ repayments 317   614
Changes to risk parameters – credit quality (781)   (1,991)
Changes to models used for ECL calculation (33)   272
Foreign exchange and others 8   (152)
Financial assets, ending balance (2,514)   (2,434)
ECL income statement change for the period 804   1,709
Allowance for ECL | Stage 2 | Non-credit impaired | Other financial assets measured at amortised cost | Financial assets at amortised cost, category      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance (11)    
Financial assets, ending balance (19)   (11)
Allowance for ECL | Stage 2 | Non-credit impaired | Debt securities in issue | Debt instruments at FVOCI      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance (2)    
Financial assets, ending balance (2)   (2)
Allowance for ECL | Stage 2 | Non-credit impaired | Loans and advances to customers | Financial assets at amortised cost, category      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance (2,318)    
Financial assets, ending balance (2,397)   (2,318)
Allowance for ECL | Stage 2 | Non-credit impaired | Loans and advances to banks | Financial assets at amortised cost, category      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance (2)    
Financial assets, ending balance (2)   (2)
Allowance for ECL | Stage 2 | Credit impaired | Financial assets at amortised cost, category      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance (7,235)    
Financial assets, ending balance (8,205)   (7,235)
Allowance for ECL | Stage 2 | Credit impaired | Loans and advances to bank and customers including loan commitments and financial guarantees      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance (7,193)   (6,148)
Transfers of financial instruments: (381)   (1,170)
– transfers to stage 3 (507)   (1,449)
– transfers from stage 3 126   279
Net remeasurement of ECL arising from transfer of stage (58)   (58)
Net new and further lending/ repayments 531   768
Changes to risk parameters – credit quality (2,344)   (3,737)
Changes to models used for ECL calculation 6   (16)
Assets written off 1,462   3,569
Credit-related modifications that resulted in derecognition | £   £ 0  
Foreign exchange and others (185)   (410)
Financial assets, ending balance (8,160)   (7,193)
ECL income statement change for the period 1,863   3,043
Allowance for ECL | Stage 2 | Credit impaired | Other financial assets measured at amortised cost | Financial assets at amortised cost, category      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance (42)    
Financial assets, ending balance (45)   (42)
Allowance for ECL | Stage 2 | Credit impaired | Debt securities in issue | Debt instruments at FVOCI      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 0    
Financial assets, ending balance 0   0
Allowance for ECL | Stage 2 | Credit impaired | Loans and advances to customers | Financial assets at amortised cost, category      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance (7,097)    
Financial assets, ending balance (7,986)   (7,097)
Allowance for ECL | Stage 2 | Credit impaired | Loans and advances to banks | Financial assets at amortised cost, category      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance (1)    
Financial assets, ending balance (1)   (1)
Allowance for ECL | Stage 2 | – POCI | Financial assets at amortised cost, category      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance (76)    
Financial assets, ending balance (76)   (76)
Allowance for ECL | Stage 2 | – POCI | Loans and advances to bank and customers including loan commitments and financial guarantees      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance (76)   (51)
Net new and further lending/ repayments 5   2
Changes to risk parameters – credit quality (4)   (24)
Foreign exchange and others (1)   (3)
Financial assets, ending balance (76)   (76)
ECL income statement change for the period (1)   22
Allowance for ECL | Stage 2 | – POCI | Other financial assets measured at amortised cost | Financial assets at amortised cost, category      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 0    
Financial assets, ending balance 0   0
Allowance for ECL | Stage 2 | – POCI | Debt securities in issue | Debt instruments at FVOCI      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 0    
Financial assets, ending balance 0   0
Allowance for ECL | Stage 2 | – POCI | Loans and advances to customers | Financial assets at amortised cost, category      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance (76)    
Financial assets, ending balance (76)   (76)
Allowance for ECL | Stage 2 | – POCI | Loans and advances to banks | Financial assets at amortised cost, category      
Increase (decrease) in financial assets [abstract]      
Financial assets, beginning balance 0    
Financial assets, ending balance $ 0   $ 0