v3.25.2
Credit risk - Disclosure of assets held for sale (Details)
£ in Millions
Jun. 30, 2025
GBP (£)
Dec. 31, 2024
GBP (£)
Gross | Retail credit cards    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets £ 20,253 £ 22,306
Gross | Retail credit cards | Stage 1    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets 15,975 17,629
Gross | Retail credit cards | Lifetime expected credit losses | Stage 2    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets 2,663 2,953
Gross | Retail credit cards | Lifetime expected credit losses | Stage 3    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets 1,615 1,724
Gross | Retail other    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets 4,036 3,949
Gross | Retail other | Stage 1    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets 3,582 3,329
Gross | Retail other | Lifetime expected credit losses | Stage 2    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets 260 404
Gross | Retail other | Lifetime expected credit losses | Stage 3    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets 194 216
Gross | Corporate loans    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets 116,105 116,995
Gross | Corporate loans | Stage 1    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets 106,426 107,194
Gross | Corporate loans | Lifetime expected credit losses | Stage 2    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets 7,815 8,147
Gross | Corporate loans | Lifetime expected credit losses | Stage 3    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets 1,864 1,654
ECL | Retail credit cards    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets (2,371) (2,557)
ECL | Retail credit cards | Stage 1    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets (297) (334)
ECL | Retail credit cards | Lifetime expected credit losses | Stage 2    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets (751) (807)
ECL | Retail credit cards | Lifetime expected credit losses | Stage 3    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets (1,323) (1,416)
ECL | Retail other    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets (35) (31)
ECL | Retail other | Stage 1    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets (12) (5)
ECL | Retail other | Lifetime expected credit losses | Stage 2    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets (3) (1)
ECL | Retail other | Lifetime expected credit losses | Stage 3    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets (20) (25)
ECL | Corporate loans    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets (818) (791)
ECL | Corporate loans | Stage 1    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets (150) (144)
ECL | Corporate loans | Lifetime expected credit losses | Stage 2    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets (261) (254)
ECL | Corporate loans | Lifetime expected credit losses | Stage 3    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets £ (407) £ (393)
Assets classified as held for sale | Total loans and advances at amortised cost    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Coverage ratio 0.042 0.049
Assets classified as held for sale | Total loans and advances at amortised cost | Stage 1    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Coverage ratio 0.011 0.012
Assets classified as held for sale | Total loans and advances at amortised cost | Lifetime expected credit losses | Stage 2    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Coverage ratio 0.227 0.184
Assets classified as held for sale | Total loans and advances at amortised cost | Lifetime expected credit losses | Stage 3    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Coverage ratio 0.811 0.739
Assets classified as held for sale | Retail credit cards | Co-branded card portolio    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Coverage ratio 0.042 0.043
Assets classified as held for sale | Retail credit cards | German Consumer Finance portfolio    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Coverage ratio 0 0.050
Assets classified as held for sale | Retail credit cards | Stage 1 | Co-branded card portolio    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Coverage ratio 0.011 0.012
Assets classified as held for sale | Retail credit cards | Stage 1 | German Consumer Finance portfolio    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Coverage ratio 0 0.009
Assets classified as held for sale | Retail credit cards | Lifetime expected credit losses | Stage 2 | Co-branded card portolio    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Coverage ratio 0.227 0.234
Assets classified as held for sale | Retail credit cards | Lifetime expected credit losses | Stage 2 | German Consumer Finance portfolio    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Coverage ratio 0 0.094
Assets classified as held for sale | Retail credit cards | Lifetime expected credit losses | Stage 3 | Co-branded card portolio    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Coverage ratio 0.808 0.807
Assets classified as held for sale | Retail credit cards | Lifetime expected credit losses | Stage 3 | German Consumer Finance portfolio    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Coverage ratio 0 0.742
Assets classified as held for sale | Retail other | German Consumer Finance portfolio    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Coverage ratio 0 0.068
Assets classified as held for sale | Retail other | Stage 1 | German Consumer Finance portfolio    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Coverage ratio 0 0.014
Assets classified as held for sale | Retail other | Lifetime expected credit losses | Stage 2 | German Consumer Finance portfolio    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Coverage ratio 0 0.150
Assets classified as held for sale | Retail other | Lifetime expected credit losses | Stage 3 | German Consumer Finance portfolio    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Coverage ratio 0 0.676
Assets classified as held for sale | Corporate loans | Co-branded card portolio    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Coverage ratio 0.078 0.085
Assets classified as held for sale | Corporate loans | Stage 1 | Co-branded card portolio    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Coverage ratio 0.023 0.020
Assets classified as held for sale | Corporate loans | Lifetime expected credit losses | Stage 2 | Co-branded card portolio    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Coverage ratio 0.286 0.333
Assets classified as held for sale | Corporate loans | Lifetime expected credit losses | Stage 3 | Co-branded card portolio    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Coverage ratio 1.000 1.000
Assets classified as held for sale | Gross | Total loans and advances at amortised cost    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets £ 5,704 £ 10,033
Assets classified as held for sale | Gross | Total loans and advances at amortised cost | Stage 1    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets 5,031 8,586
Assets classified as held for sale | Gross | Total loans and advances at amortised cost | Lifetime expected credit losses | Stage 2    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets 620 1,225
Assets classified as held for sale | Gross | Total loans and advances at amortised cost | Lifetime expected credit losses | Stage 3    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets 53 222
Assets classified as held for sale | Gross | Retail credit cards | Co-branded card portolio    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets 5,653 6,241
Assets classified as held for sale | Gross | Retail credit cards | German Consumer Finance portfolio    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets 0 2,308
Assets classified as held for sale | Gross | Retail credit cards | Stage 1 | Co-branded card portolio    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets 4,988 5,495
Assets classified as held for sale | Gross | Retail credit cards | Stage 1 | German Consumer Finance portfolio    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets 0 1,908
Assets classified as held for sale | Gross | Retail credit cards | Lifetime expected credit losses | Stage 2 | Co-branded card portolio    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets 613 689
Assets classified as held for sale | Gross | Retail credit cards | Lifetime expected credit losses | Stage 2 | German Consumer Finance portfolio    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets 0 307
Assets classified as held for sale | Gross | Retail credit cards | Lifetime expected credit losses | Stage 3 | Co-branded card portolio    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets 52 57
Assets classified as held for sale | Gross | Retail credit cards | Lifetime expected credit losses | Stage 3 | German Consumer Finance portfolio    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets 0 93
Assets classified as held for sale | Gross | Retail other | German Consumer Finance portfolio    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets 0 1,425
Assets classified as held for sale | Gross | Retail other | Stage 1 | German Consumer Finance portfolio    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets 0 1,134
Assets classified as held for sale | Gross | Retail other | Lifetime expected credit losses | Stage 2 | German Consumer Finance portfolio    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets 0 220
Assets classified as held for sale | Gross | Retail other | Lifetime expected credit losses | Stage 3 | German Consumer Finance portfolio    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets 0 71
Assets classified as held for sale | Gross | Corporate loans | Co-branded card portolio    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets 51 59
Assets classified as held for sale | Gross | Corporate loans | Stage 1 | Co-branded card portolio    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets 43 49
Assets classified as held for sale | Gross | Corporate loans | Lifetime expected credit losses | Stage 2 | Co-branded card portolio    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets 7 9
Assets classified as held for sale | Gross | Corporate loans | Lifetime expected credit losses | Stage 3 | Co-branded card portolio    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets 1 1
Assets classified as held for sale | ECL | Total loans and advances at amortised cost    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets (240) (489)
Assets classified as held for sale | ECL | Total loans and advances at amortised cost | Stage 1    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets (56) (99)
Assets classified as held for sale | ECL | Total loans and advances at amortised cost | Lifetime expected credit losses | Stage 2    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets (141) (226)
Assets classified as held for sale | ECL | Total loans and advances at amortised cost | Lifetime expected credit losses | Stage 3    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets (43) (164)
Assets classified as held for sale | ECL | Retail credit cards | Co-branded card portolio    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets (236) (271)
Assets classified as held for sale | ECL | Retail credit cards | German Consumer Finance portfolio    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets 0 (116)
Assets classified as held for sale | ECL | Retail credit cards | Stage 1 | Co-branded card portolio    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets (55) (64)
Assets classified as held for sale | ECL | Retail credit cards | Stage 1 | German Consumer Finance portfolio    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets 0 (18)
Assets classified as held for sale | ECL | Retail credit cards | Lifetime expected credit losses | Stage 2 | Co-branded card portolio    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets (139) (161)
Assets classified as held for sale | ECL | Retail credit cards | Lifetime expected credit losses | Stage 2 | German Consumer Finance portfolio    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets 0 (29)
Assets classified as held for sale | ECL | Retail credit cards | Lifetime expected credit losses | Stage 3 | Co-branded card portolio    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets (42) (46)
Assets classified as held for sale | ECL | Retail credit cards | Lifetime expected credit losses | Stage 3 | German Consumer Finance portfolio    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets 0 (69)
Assets classified as held for sale | ECL | Retail other | German Consumer Finance portfolio    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets 0 (97)
Assets classified as held for sale | ECL | Retail other | Stage 1 | German Consumer Finance portfolio    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets 0 (16)
Assets classified as held for sale | ECL | Retail other | Lifetime expected credit losses | Stage 2 | German Consumer Finance portfolio    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets 0 (33)
Assets classified as held for sale | ECL | Retail other | Lifetime expected credit losses | Stage 3 | German Consumer Finance portfolio    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets 0 (48)
Assets classified as held for sale | ECL | Corporate loans | Co-branded card portolio    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets (4) (5)
Assets classified as held for sale | ECL | Corporate loans | Stage 1 | Co-branded card portolio    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets (1) (1)
Assets classified as held for sale | ECL | Corporate loans | Lifetime expected credit losses | Stage 2 | Co-branded card portolio    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets (2) (3)
Assets classified as held for sale | ECL | Corporate loans | Lifetime expected credit losses | Stage 3 | Co-branded card portolio    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets £ (1) £ (1)