Barclays Bank (ATMP) 6-K 1 Aug 24 2024 Q2 Current report (foreign) Financial data

Cover

Cover	6 Months Ended
	Jun. 30, 2024
Cover [Abstract]
Document Type	6-K
Entity Registrant Name	Barclays Bank PLC
Amendment Flag	false
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q2
Document Period End Date	Jun. 30, 2024
Entity Central Index Key	0000312070
Current Fiscal Year End Date	--12-31

Condensed consolidated income s

Condensed consolidated income statement (unaudited) - GBP (£) £ in Millions		6 Months Ended
		Jun. 30, 2024	Jun. 30, 2023
Profit or loss [abstract]
Interest and similar income		£ 12,772	£ 10,692
Interest and similar expense		(9,657)	(7,572)
Net interest income		3,115	3,120
Fee and commission income		4,775	4,527
Fee and commission expense		(1,527)	(1,721)
Net fee and commission income		3,248	2,806
Net trading income		3,302	3,853
Net investment income/(expense)		15	(14)
Other income		14	39
Total income		9,694	9,804
Staff costs		(2,866)	(2,827)
Infrastructure, administration and general expenses		(3,199)	(3,125)
UK regulatory levies	[1]	(66)	0
Litigation and conduct		(56)	(34)
Operating expenses		(6,187)	(5,986)
Share of post-tax results of associates and joint ventures		1	2
Profit/(loss) before impairment		3,508	3,820
Credit impairment charge		(831)	(688)
Profit before tax		2,677	3,132
Tax charge		(520)	(525)
Profit after tax		2,157	2,607
Attributable to:
Equity holders of the parent		1,735	2,188
Other equity instrument holders		422	419
Profit after tax		£ 2,157	£ 2,607
[1]Comprises the impact of the BoE levy scheme. Please refer to Financial Review, Other matters for details.

Condensed consolidated statemen

Condensed consolidated statement of comprehensive income (unaudited) - GBP (£) £ in Millions		6 Months Ended
		Jun. 30, 2024	Jun. 30, 2023
Statement of comprehensive income [abstract]
Profit after tax		£ 2,157	£ 2,607
Other comprehensive (loss)/income that may be recycled to profit or loss
Currency translation reserve	[1]	(107)	(1,325)
Fair value through other comprehensive income reserve	[1]	(286)	58
Cash flow hedging reserve	[1]	(169)	(383)
Other comprehensive loss that may be recycled to profit or loss	[1]	(562)	(1,650)
Other comprehensive loss not recycled to profit or loss
Retirement benefit remeasurements		(97)	(476)
Own credit		(462)	(494)
Other comprehensive loss not recycled to profit or loss		(559)	(970)
Other comprehensive loss for the period		(1,121)	(2,620)
Total comprehensive income/(loss) for the period		£ 1,036	£ (13)
[1] Reported net of tax.

Condensed consolidated balance

Condensed consolidated balance sheet (unaudited) - GBP (£) £ in Millions	Jun. 30, 2024	Dec. 31, 2023
Assets
Cash and balances at central banks	£ 212,127	£ 189,686
Cash collateral and settlement balances	141,368	103,708
Debt securities at amortised cost	44,799	39,046
Loans and advances at amortised cost to banks	8,565	9,024
Loans and advances at amortised cost to customers	137,208	137,177
Reverse repurchase agreements and other similar secured lending	2,980	1,103
Trading portfolio assets	197,281	174,566
Financial assets at fair value through the income statement	213,305	204,236
Derivative financial instruments	252,244	256,111
Financial assets at fair value through other comprehensive income	54,022	51,423
Investments in associates and joint ventures	15	22
Goodwill and intangible assets	1,035	1,084
Property, plant and equipment	1,546	1,262
Current tax assets	427	546
Deferred tax assets	4,291	3,888
Retirement benefit assets	3,541	3,667
Assets included in disposal groups classified as held for sale	3,725	3,916
Other assets	5,485	4,701
Total assets	1,283,964	1,185,166
Liabilities
Deposits at amortised cost from banks	19,588	14,598
Deposits at amortised cost from customers	304,424	287,200
Cash collateral and settlement balances	142,670	92,988
Repurchase agreements and other similar secured borrowing	39,533	28,554
Debt securities in issue	43,078	45,653
Subordinated liabilities	37,849	35,903
Trading portfolio liabilities	58,672	57,761
Financial liabilities designated at fair value	321,082	298,573
Derivative financial instruments	242,065	249,880
Current tax liabilities	683	411
Deferred tax liabilities	3	3
Retirement benefit liabilities	167	173
Provisions	757	817
Liabilities included in disposal groups classified as held for sale	3,984	3,164
Other liabilities	10,299	8,984
Total liabilities	1,224,854	1,124,662
Equity
Called up share capital and share premium	2,348	2,348
Other equity instruments	9,875	10,765
Other reserves	(1,387)	(363)
Retained earnings	48,274	47,754
Total equity	59,110	60,504
Total liabilities and equity	£ 1,283,964	£ 1,185,166

Condensed consolidated statem_2

Condensed consolidated statement of changes in equity (unaudited) - GBP (£) £ in Millions	Total		Called up share capital and share premium	Other equity instruments	[1]	Other reserves	[2]	Retained earnings
Beginning balance, equity at Dec. 31, 2022	£ 58,953		£ 2,348	£ 10,691		£ (1,464)		£ 47,378
Profit after tax	2,607			419				2,188
Currency translation movements	(1,325)	[3]				(1,325)
Fair value through other comprehensive income reserve	58	[3]				58
Cash flow hedges	(383)	[3]				(383)
Retirement benefit remeasurements	(476)							(476)
Own credit	(494)					(494)
Total comprehensive income/(loss) for the period	(13)			419		(2,144)		1,712
Issue and exchange of equity instruments	613			613
Other equity instruments coupons paid	(419)			(419)
Employee settled Barclays PLC shares scheme	241							241
Vesting of Barclays PLC shares under share based payment schemes	(430)							(430)
Dividends paid on ordinary shares	(700)							(700)
Dividends paid on preference shares and other shareholders equity	(19)							(19)
Net equity impact on intra group transfers	124					220		(96)
Other reserve movements	(2)							(2)
Ending balance, equity at Jun. 30, 2023	58,348		2,348	11,304		(3,388)		48,084
Profit after tax	954			389				565
Currency translation movements	116					116
Fair value through other comprehensive income reserve	77					77
Cash flow hedges	3,045					3,045
Retirement benefit remeasurements	(370)							(370)
Own credit	(216)					(216)
Total comprehensive income/(loss) for the period	3,606			389		3,022		195
Issue and exchange of equity instruments	(551)			(539)				(12)
Other equity instruments coupons paid	(389)			(389)
Employee settled Barclays PLC shares scheme	168							168
Vesting of Barclays PLC shares under share based payment schemes	(12)							(12)
Dividends paid on ordinary shares	(648)							(648)
Dividends paid on preference shares and other shareholders equity	(21)							(21)
Other reserve movements	3					3
Ending balance, equity at Dec. 31, 2023	60,504		2,348	10,765		(363)		47,754
Profit after tax	2,157			422				1,735
Currency translation movements	(107)	[3]				(107)
Fair value through other comprehensive income reserve	(286)	[3]				(286)
Cash flow hedges	(169)	[3]				(169)
Retirement benefit remeasurements	(97)							(97)
Own credit	(462)					(462)
Total comprehensive income/(loss) for the period	1,036			422		(1,024)		1,638
Issue and exchange of equity instruments	(982)			(890)				(92)
Other equity instruments coupons paid	(422)			(422)
Employee settled Barclays PLC shares scheme	289							289
Vesting of Barclays PLC shares under share based payment schemes	(432)							(432)
Dividends paid on ordinary shares	(852)							(852)
Dividends paid on preference shares and other shareholders equity	(21)							(21)
Other reserve movements	(10)							(10)
Ending balance, equity at Jun. 30, 2024	£ 59,110		£ 2,348	£ 9,875		£ (1,387)		£ 48,274
[1] Other equity instruments of £9,875m (December 2023: £10,765m) comprise AT1 securities issued to Barclays PLC. Barclays PLC uses funds from market issuances to purchase AT1 securities from Barclays Bank PLC. There was one issuance in the form of Fixed Rate Resetting Perpetual Subordinated Contingent Convertible Securities totalling £619m (net of issuance cost of £6m) and one redemption for £1,509m (net of £6m issuance cost, transferred to retained earnings on redemption) for the period ended 30 June 2024. During the period ended 31 December 2023, there were three issuances in the form of Fixed Rate Resetting Perpetual Subordinated Contingent Convertible Securities totalling £2,499m, which includes issuance costs of £26m and two redemptions totalling £2,425m. Details of other reserves are shown on pages 41 Reported net of tax.

Condensed consolidated statem_3

Condensed consolidated statement of changes in equity (unaudited) (Parenthetical) £ in Millions		6 Months Ended	12 Months Ended
		Jun. 30, 2024 GBP (£) issuance redemption	Dec. 31, 2023 GBP (£) redemption issuance
Equity		£ 59,110	£ 60,504
Other equity instruments
Equity	[1]	£ 9,875	£ 10,765
Other equity instruments | Fixed Rate Resetting Perpetual Subordinated Contingent Convertible Securities
Number of convertible instruments issued | issuance		1	3
Issue of convertible instruments		£ 619	£ 2,499
Issuance costs of convertible instruments		£ 6	£ 26
Number of convertible instruments redeemed | redemption		1	2
Notional amount		£ 1,509	£ 2,425
Issuance costs of convertible instruments redeemed		£ 6
[1] Other equity instruments of £9,875m (December 2023: £10,765m) comprise AT1 securities issued to Barclays PLC. Barclays PLC uses funds from market issuances to purchase AT1 securities from Barclays Bank PLC. There was one issuance in the form of Fixed Rate Resetting Perpetual Subordinated Contingent Convertible Securities totalling £619m (net of issuance cost of £6m) and one redemption for £1,509m (net of £6m issuance cost, transferred to retained earnings on redemption) for the period ended 30 June 2024. During the period ended 31 December 2023, there were three issuances in the form of Fixed Rate Resetting Perpetual Subordinated Contingent Convertible Securities totalling £2,499m, which includes issuance costs of £26m and two redemptions totalling £2,425m.

Condensed consolidated cash flo

Condensed consolidated cash flow statement (unaudited) - GBP (£) £ in Millions	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Statement of cash flows [abstract]
Profit before tax	£ 2,677	£ 3,132
Adjustment for non-cash items	2,586	5,832
Net (increase)/decrease in loans and advances at amortised cost	(2,723)	8,081
Net increase in deposits at amortised cost	22,214	16,241
Net decrease in debt securities in issue	(2,575)	(1,635)
Changes in other operating assets and liabilities	10,137	308
Corporate income tax (paid)/received	(66)
Corporate income tax (paid)/received		174
Net cash from operating activities	32,250	32,133
Net cash from investing activities	(7,383)	(11,947)
Net cash from financing activities	(67)	(1,114)
Effect of exchange rates on cash and cash equivalents	(1,622)	(6,546)
Net increase in cash and cash equivalents	23,178	12,526
Cash and cash equivalents at beginning of the period	208,412	219,854
Cash and cash equivalents at end of the period	£ 231,590	£ 232,380

Credit risk

Credit risk	6 Months Ended
	Jun. 30, 2024
Disclosure of credit risk exposure [abstract]
Credit risk	Loans and advances at amortised cost by product Total loans and advances at amortised cost in the credit risk performance section includes loans and advances at amortised cost to banks and loans and advances at amortised cost to customers. The table below presents a product breakdown by stages of loans and advances at amortised cost and the impairment allowance. Also included are stage allocation of debt securities by gross exposure, impairment allowance and coverage ratio. Impairment allowance under IFRS 9 considers both the drawn and the undrawn counterparty exposure. For retail portfolios, the total impairment allowance is allocated to gross loans and advances to the extent allowance does not exceed the drawn exposure and any excess is reported on the liabilities side of the balance sheet as a provision. For corporate portfolios, impairment allowance on undrawn exposure is reported on the liability side of the balance sheet as a provision. Stage 2 As at 30.06.24 Stage 1 Not past due <=30 days past due >30 days past due Total Stage 3 Total 1 Gross exposure £m £m £m £m £m £m £m Retail mortgages 4,587 15 3 51 69 601 5,257 Retail credit cards 21,766 2,747 316 262 3,325 1,844 26,935 Retail other 3,017 239 51 107 397 222 3,636 Corporate loans 103,960 8,505 49 243 8,797 1,328 114,085 Total loans and advances at amortised cost 133,330 11,506 419 663 12,588 3,995 149,913 Debt securities at amortised cost 41,261 3,556 — — 3,556 — 44,817 Total loans and advances at amortised cost including debt securities 174,591 15,062 419 663 16,144 3,995 194,730 Impairment allowance Retail mortgages 6 — — — — 283 289 Retail credit cards 399 771 140 164 1,075 1,507 2,981 Retail other 6 3 — — 3 29 38 Corporate loans 168 250 7 8 265 399 832 Total loans and advances at amortised cost 579 1,024 147 172 1,343 2,218 4,140 Debt securities at amortised cost 8 10 — — 10 — 18 Total loans and advances at amortised cost including debt securities 587 1,034 147 172 1,353 2,218 4,158 Net exposure Retail mortgages 4,581 15 3 51 69 318 4,968 Retail credit cards 21,367 1,976 176 98 2,250 337 23,954 Retail other 3,011 236 51 107 394 193 3,598 Corporate loans 103,792 8,255 42 235 8,532 929 113,253 Total loans and advances at amortised cost 132,751 10,482 272 491 11,245 1,777 145,773 Debt securities at amortised cost 41,253 3,546 — — 3,546 — 44,799 Total loans and advances at amortised cost including debt securities 174,004 14,028 272 491 14,791 1,777 190,572 Coverage ratio % % % % % % % Retail mortgages 0.1 — — — — 47.1 5.5 Retail credit cards 1.8 28.1 44.3 62.6 32.3 81.7 11.1 Retail other 0.2 1.3 — — 0.8 13.1 1.0 Corporate loans 0.2 2.9 14.3 3.3 3.0 30.0 0.7 Total loans and advances at amortised cost 0.4 8.9 35.1 25.9 10.7 55.5 2.8 Debt securities at amortised cost — 0.3 — — 0.3 — — Total loans and advances at amortised cost including debt securities 0.3 6.9 35.1 25.9 8.4 55.5 2.1 1 Other financial assets subject to impairment excluded in the table above include cash collateral and settlement balances, financial assets at fair value through other comprehensive income and other assets. These have a total gross exposure of £193.9bn and an impairment allowance of £149m. This comprises £16m impairment allowance on £192.8bn Stage 1 exposure, £3m on £1.0bn Stage 2 exposure and £130m on £136m Stage 3 exposure. Loan commitments and financial guarantee contracts have total impairment allowance of £452m. Stage 2 As at 31.12.23 Stage 1 Not past due <=30 days past due >30 days past due Total Stage 3 Total 1 Gross exposure £m £m £m £m £m £m £m Retail mortgages 7,257 342 14 33 389 716 8,362 Retail credit cards 22,315 2,818 339 293 3,450 1,522 27,287 Retail other 2,734 210 71 88 369 308 3,411 Corporate loans 100,956 8,642 166 159 8,967 1,235 111,158 Total loans and advances at amortised cost 133,262 12,012 590 573 13,175 3,781 150,218 Debt securities at amortised cost 35,321 3,749 — — 3,749 — 39,070 Total loans and advances at amortised cost including debt securities 168,583 15,761 590 573 16,924 3,781 189,288 Impairment allowance Retail mortgages 11 23 3 2 28 321 360 Retail credit cards 412 805 145 188 1,138 1,226 2,776 Retail other 8 2 — — 2 35 45 Corporate loans 179 295 7 7 309 348 836 Total loans and advances at amortised cost 610 1,125 155 197 1,477 1,930 4,017 Debt securities at amortised cost 7 17 — — 17 — 24 Total loans and advances at amortised cost including debt securities 617 1,142 155 197 1,494 1,930 4,041 Net exposure Retail mortgages 7,246 319 11 31 361 395 8,002 Retail credit cards 21,903 2,013 194 105 2,312 296 24,511 Retail other 2,726 208 71 88 367 273 3,366 Corporate loans 100,777 8,347 159 152 8,658 887 110,322 Total loans and advances at amortised cost 132,652 10,887 435 376 11,698 1,851 146,201 Debt securities at amortised cost 35,314 3,732 — — 3,732 — 39,046 Total loans and advances at amortised cost including debt securities 167,966 14,619 435 376 15,430 1,851 185,247 Coverage ratio % % % % % % % Retail mortgages 0.2 6.7 21.4 6.1 7.2 44.8 4.3 Retail credit cards 1.8 28.6 42.8 64.2 33.0 80.6 10.2 Retail other 0.3 1.0 — — 0.5 11.4 1.3 Corporate loans 0.2 3.4 4.2 4.4 3.4 28.2 0.8 Total loans and advances at amortised cost 0.5 9.4 26.3 34.4 11.2 51.0 2.7 Debt securities at amortised cost — 0.5 — — 0.5 — 0.1 Total loans and advances at amortised cost including debt securities 0.4 7.2 26.3 34.4 8.8 51.0 2.1 1 Other financial assets subject to impairment excluded in the table above include cash collateral and settlement balances, financial assets at fair value through other comprehensive income, accrued income and sundry debtors. These have a total gross exposure of £157.7bn and an impairment allowance of £145m. This comprises £14m impairment allowance on £157.3bn Stage 1 exposure, £1m on £243m Stage 2 exposure and £130m on £136m Stage 3 exposure. Loan commitments and financial guarantee contracts have total impairment allowance of £473m. Assets held for sale During 2023, gross loans and advances and related impairment allowances for the German consumer finance business portfolio were reclassified from loans and advances to customers to assets held for sale in the balance sheet. Loans and advances to customers classified as assets held for sale Stage 1 Stage 2 Stage 3 Total Gross ECL Coverage Gross ECL Coverage Gross ECL Coverage Gross ECL Coverage As at 30.06.24 £m £m % £m £m % £m £m % £m £m % Retail credit cards 1,660 17 1.0 453 41 9.1 93 68 73.1 2,206 126 5.7 Retail other 1,361 18 1.3 259 35 13.5 79 55 69.6 1,699 108 6.4 Total 3,021 35 1.2 712 76 10.7 172 123 71.5 3,905 234 6.0 As at 31.12.23 Retail credit cards 1,621 15 0.9 445 41 9.2 92 68 73.9 2,158 124 5.7 Retail other 1,561 20 1.3 288 32 11.1 84 60 71.4 1,933 112 5.8 Total 3,182 35 1.1 733 73 10.0 176 128 72.7 4,091 236 5.8 Movement in gross exposures and impairment allowance including provisions for loan commitments and financial guarantees The following tables present a reconciliation of the opening to the closing balance of the exposure and impairment allowance. Transfers between stages in the tables have been reflected as if they had taken place at the beginning of the period. 'Net drawdowns, repayments, net re-measurement and movements due to exposure and risk parameter changes' includes additional drawdowns and partial repayments from existing facilities. Additionally, the below tables do not include other financial assets subject to impairment such as debt securities at amortised cost, cash collateral and settlement balances, financial assets at fair value through other comprehensive income and other assets. The movements are measured over a six-month period. Loans and advances at amortised cost Stage 1 Stage 2 Stage 3 Total Gross exposure ECL Gross exposure ECL Gross exposure ECL Gross exposure ECL £m £m £m £m £m £m £m £m Retail mortgages As at 1 January 2024 7,257 11 389 28 716 321 8,362 360 Transfers from Stage 1 to Stage 2 (136) — 136 — — — — — Transfers from Stage 2 to Stage 1 90 3 (90) (3) — — — — Transfers to Stage 3 (34) — (30) (3) 64 3 — — Transfers from Stage 3 18 1 18 1 (36) (2) — — Business activity in the period 247 — — — — — 247 — Refinements to models used for calculation — — — — — — — — Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes 127 (3) (7) 7 47 3 167 7 Final repayments (505) (1) (31) (1) (53) (2) (589) (4) Disposals 1 (2,477) (5) (316) (29) (129) (32) (2,922) (66) Write-offs — — — — (8) (8) (8) (8) As at 30 June 2024 4,587 6 69 — 601 283 5,257 289 Retail credit cards As at 1 January 2024 22,315 412 3,450 1,138 1,522 1,226 27,287 2,776 Transfers from Stage 1 to Stage 2 (1,358) (49) 1,358 49 — — — — Transfers from Stage 2 to Stage 1 1,038 285 (1,038) (285) — — — — Transfers to Stage 3 (211) (9) (600) (296) 811 305 — — Transfers from Stage 3 5 4 5 3 (10) (7) — — Business activity in the period 715 16 34 13 1 — 750 29 Refinements to models used for calculation 2 — 27 — 5 — 11 — 43 Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes 22 (263) 309 525 (8) 444 323 706 Final repayments (61) (4) (17) (7) — — (78) (11) Disposals 1 (699) (20) (176) (70) (1) (1) (876) (91) Write-offs — — — — (471) (471) (471) (471) As at 30 June 2024 21,766 399 3,325 1,075 1,844 1,507 26,935 2,981 1 The £2.9bn of gross disposals reported within Retail mortgages relate to sale of the performing Italian mortgage portfolio. The £876m of gross disposals reported within Retail credit cards relate to sale of the outstanding US Cards receivables to Blackstone. 2 Refinements to models used for calculation reported within Retail credit cards include a £43m movement in the calculated ECL for the US Cards portfolio. These reflect model enhancements made during the period. Barclays continually reviews the output of models to determine accuracy of the ECL calculation including review of model monitoring, external benchmarking and experience of model operation over an extended period of time. This helps to ensure that the models used continue to reflect the risks inherent across the businesses. Stage 1 Stage 2 Stage 3 Total Gross exposure ECL Gross exposure ECL Gross exposure ECL Gross exposure ECL £m £m £m £m £m £m £m £m Retail other As at 1 January 2024 2,734 8 369 2 308 35 3,411 45 Transfers from Stage 1 to Stage 2 (162) — 162 — — — — — Transfers from Stage 2 to Stage 1 83 — (83) — — — — — Transfers to Stage 3 (69) — (54) — 123 — — — Transfers from Stage 3 25 — 45 — (70) — — — Business activity in the period 717 1 44 — — — 761 1 Refinements to models used for calculation — — — — — — — — Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes 874 (1) (6) 2 1 4 869 5 Final repayments (1,185) (2) (80) (1) (132) (2) (1,397) (5) Disposals — — — — — — — — Write-offs — — — — (8) (8) (8) (8) As at 30 June 2024 3,017 6 397 3 222 29 3,636 38 Corporate loans As at 1 January 2024 100,956 179 8,967 309 1,235 348 111,158 836 Transfers from Stage 1 to Stage 2 (2,083) (11) 2,083 11 — — — — Transfers from Stage 2 to Stage 1 1,742 49 (1,742) (49) — — — — Transfers to Stage 3 (59) (1) (317) (16) 376 17 — — Transfers from Stage 3 94 1 7 1 (101) (2) — — Business activity in the period 15,771 24 586 15 50 1 16,407 40 Refinements to models used for calculation 1 — 3 — 18 — — — 21 Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes 5,039 (55) 229 24 (27) 135 5,241 104 Final repayments (17,470) (20) (1,011) (47) (107) (2) (18,588) (69) Disposals 2 (30) (1) (5) (1) — — (35) (2) Write-offs — — — — (98) (98) (98) (98) As at 30 June 2024 103,960 168 8,797 265 1,328 399 114,085 832 1 Refinements to models used for calculation reported within Corporate loans include a £21m movement in the calculated ECL for the IB portfolio. These reflect model enhancements made during the period. Barclays continually reviews the output of models to determine accuracy of the ECL calculation including review of model monitoring, external benchmarking and experience of model operation over an extended period of time. This helps to ensure that the models used continue to reflect the risks inherent across the businesses. 2 The £35m of gross disposals reported within Corporate loans relate to debt sales undertaken during the period. Reconciliation of ECL movement to impairment charge/(release) for the period Stage 1 Stage 2 Stage 3 Total £m £m £m £m Retail mortgages — 1 2 3 Retail credit cards 7 7 753 767 Retail other (2) 1 2 1 Corporate loans (10) (43) 149 96 ECL movement excluding disposals and write-offs 1 (5) (34) 906 867 ECL movement on loan commitments and other financial guarantees 15 (23) (13) (21) ECL movement on other financial assets 2 2 — 4 ECL movement on debt securities at amortised cost 1 (7) — (6) Recoveries and reimbursements 2 (31) 25 (26) (32) ECL charge on assets held for sale 44 Total exchange and other adjustments (25) Total income statement charge for the period 831 1 In H124, gross write-offs amounted to £585m (H123: £404m). Post write-off recoveries amounted to £14m (H123: £7m). Net write-offs represent gross write-offs less post write-off recoveries and amounted to £571m (H123: £397m). 2 Recoveries and reimbursements include £18m (H123 loss: £7m) for reimbursements expected to be received under the arrangement where Barclays Bank Group has entered into financial guarantee contracts which provide credit protection over certain assets with third parties and cash recoveries of previously written off amounts £14m (H123: £7m). Loan commitments and financial guarantees Stage 1 Stage 2 Stage 3 Total Gross exposure ECL Gross exposure ECL Gross exposure ECL Gross exposure ECL £m £m £m £m £m £m £m £m Retail mortgages As at 1 January 2024 41 — — — 1 — 42 — Net transfers between stages — — — — — — — — Business activity in the year — — — — — — — — Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes 5 — — — — — 5 — Limit management and final repayments (7) — — — — — (7) — As at 30 June 2024 39 — — — 1 — 40 — Retail credit cards 1 As at 1 January 2024 109,634 48 1,767 36 10 1 111,411 85 Net transfers between stages (920) 21 918 (21) 2 — — — Business activity in the year 7,550 7 48 3 1 — 7,599 10 Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes 2,935 (16) (774) 20 (3) — 2,158 4 Limit management and final repayments (5,567) (5) (239) (10) — — (5,806) (15) As at 30 June 2024 113,632 55 1,720 28 10 1 115,362 84 Retail other 1 As at 1 January 2024 3,446 5 116 2 29 — 3,591 7 Net transfers between stages (4) — (2) — 6 — — — Business activity in the year 442 1 84 — — — 526 1 Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes 316 (1) (35) (2) 1 — 282 (3) Limit management and final repayments (540) — (7) — (16) — (563) — As at 30 June 2024 3,660 5 156 — 20 — 3,836 5 Corporate loans As at 1 January 2024 212,414 114 20,035 225 802 42 233,251 381 Net transfers between stages 2,335 35 (2,482) (37) 147 2 — — Business activity in the year 48,333 19 2,364 20 72 — 50,769 39 Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes 5,058 (34) 552 40 (97) (10) 5,513 (4) Limit management and final repayments (46,540) (12) (4,533) (36) (104) (5) (51,177) (53) As at 30 June 2024 221,600 122 15,936 212 820 29 238,356 363 1 Loan commitments reported within Retail credit cards and Retail other also include financial assets classified as held for sale. Management adjustments to models for impairment Management adjustments to impairment models are applied in order to factor in certain conditions or changes in policy that are not fully incorporated into the impairment models, or to reflect additional facts and circumstances at the period end. Management adjustments are reviewed and incorporated into future model development where applicable. Management adjustments are captured through “Economic uncertainty” and “Other” adjustments, and are presented by product below: Management adjustments to models for impairment allowance presented by product 1 Impairment allowance pre management adjustments 2 Economic uncertainty adjustments Other adjustments 3 Management adjustments Total impairment allowance 4 Proportion of Management adjustments to total impairment allowance (a) (b) (a+b) As at 30.06.2024 £m £m £m £m £m % Retail mortgages 292 — (3) (3) 289 (1.0) Retail credit cards 3,065 — — — 3,065 — Retail other 42 — 1 1 43 2.3 Corporate loans 1,163 — 32 32 1,195 2.7 Total 4,562 — 30 30 4,592 0.7 Debt securities at amortised cost 27 — (9) (9) 18 (50.0) Total including debt securities at amortised cost 4,589 — 21 21 4,610 0.5 As at 31.12.2023 £m £m £m £m £m % Retail mortgages 363 — (3) (3) 360 (0.8) Retail credit cards 2,852 — 9 9 2,861 0.3 Retail other 62 — (10) (10) 52 (19.2) Corporate loans 1,231 16 (30) (14) 1,217 (1.2) Total 4,508 16 (34) (18) 4,490 (0.4) Debt securities at amortised cost 24 — — — 24 — Total including debt securities at amortised cost 4,532 16 (34) (18) 4,514 (0.4) Economic uncertainty adjustments presented by stage Stage 1 Stage 2 Stage 3 Total As at 31.12.2023 £m £m £m £m Retail mortgages — — — — Retail credit cards — — — — Retail other — — — — Corporate loans 4 12 — 16 Total 4 12 — 16 1 Positive values reflect an increase in impairment allowance and negative values reflect a reduction in the impairment allowance. 2 Includes £4.1bn (December 2023: £4.0bn) of modelled ECL, £0.3bn (December 2023: £0.3bn) of individually assessed impairments and £0.2bn (December 2023: £0.2bn) of ECL from non-modelled exposures and debt securities. 3 Management adjustments related to other financial assets subject to impairment not included in the table above include cash collateral and settlement balances £ (2) m and financial assets at fair value through other comprehensive income £ (2) m within the IB portfolio. 4 Total impairment allowance consists of ECL stock on drawn and undrawn exposure. Economic Uncertainty adjustments Economic uncertainty adjustments are captured in two ways. Firstly, customer uncertainty: the identification of customers and clients who may be more vulnerable to economic instability; and secondly, model uncertainty: to capture the impact from model limitations and sensitivities to specific macroeconomic parameters which are applied at a portfolio level. The previously held customer and client uncertainty provision to provide for expected downside uncertainties on European Corporates has been retired following a resilient credit performance and updated macroeconomic outlook. Other adjustments Other adjustments are operational in nature and are expected to remain in place until they can be reflected in the underlying models. These adjustments result from data limitations and model performance related issues identified through model monitoring and other established governance processes. Other adjustments of £21m (December 2023: £(34)m) includes: • Corporate loans £32m (December 2023: £(30)m): The movement is driven by an adjustment introduced to align the credit conversion factor on revolving credit facilities within the IB portfolio to Basel 3.1. • Debt securities £(9)m: This reflects an adjustment applied to Exposure at Default (EAD) within the IB portfolio to remediate an overly conservative modelled amortisation expectation. Measurement uncertainty Scenarios used to calculate the Barclays Bank Group’s expected credit losses charge were refreshed in Q224 with the Baseline scenario reflecting the latest consensus macroeconomic forecasts available at the time of the scenario refresh. In the Baseline scenario, the UK economy is gradually recovering and is further stimulated as restrictive monetary policy starts loosening. US GDP growth falls to 1.7% in 2025 but then stabilises at 2.0%. Labour markets remain resilient. The average UK and US unemployment rates peak at 4.4% and 4.1% respectively in 2025 and remain at these levels for the rest of the 5-year projection period. With the significant decline in inflationary pressures, major central banks begin to cut rates in 2024. UK house prices keep falling in 2024 before stabilising and resuming the upward trend from 2025. The housing market in the US remains more resilient, with house prices continuing to grow. In the Downside 2 scenario, inflationary pressures are assumed to intensify again, mainly driven by strong wage growth. Central banks raise rates further, with the UK bank rate and the US federal funds rate each reaching 8.5% in Q125. Major economies experience a rapid tightening of financial conditions alongside a significant increase in market volatility resulting in a sharp repricing of assets and higher credit losses. Central banks are forced to cut interest rates aggressively. Falling demand reduces UK and US GDP and headline inflation drops significantly. In the Upside 2 scenario, a rise in labour force participation and higher productivity contribute to accelerated economic growth without creating new inflationary pressures. With inflation continuing to fall, central banks lower interest rates, further stimulating aggregate demand, leading to reduced unemployment and healthy GDP growth. The methodology for estimating scenario probability weights involves simulating a range of future paths for UK and US GDP using historical data with the five scenarios mapped against the distribution of these future paths. The median is centred around the Baseline with scenarios further from the Baseline attracting a lower weighting before the five weights are normalised to total 100%. The increases in the Upside scenario weightings were driven by the improvement in GDP in the Baseline scenario, bringing the Baseline scenario closer to the Upside scenarios. For further details see page 18 The tables on the following pages show the key macroeconomic variables used in the five scenarios (5-year annual paths) and the probability weights applied to each scenario. Macroeconomic variables used in the calculation of ECL As at 30 June 2024 2024 2025 2026 2027 2028 Baseline % % % % % UK GDP 1 0.7 1.2 1.6 1.7 1.6 UK unemployment 2 4.3 4.4 4.4 4.4 4.4 UK HPI 3 (1.2) 1.6 3.0 4.4 3.2 UK bank rate 6 5.0 4.3 3.8 3.6 3.5 US GDP 1 2.3 1.7 2.0 2.0 2.0 US unemployment 4 4.0 4.1 4.1 4.1 4.1 US HPI 5 3.3 3.0 3.3 3.3 3.3 US federal funds rate 6 5.3 4.4 4.0 3.8 3.8 Downside 2 UK GDP 1 0.2 (3.2) 0.5 2.1 1.3 UK unemployment 2 4.4 6.4 6.9 5.3 4.7 UK HPI 3 (3.6) (23.3) 2.8 15.6 7.7 UK bank rate 6 5.9 4.0 1.0 1.0 1.0 US GDP 1 1.8 (2.9) 1.2 2.8 1.6 US unemployment 4 4.2 6.3 6.4 5.3 4.9 US HPI 5 0.9 (10.7) 2.0 8.0 5.3 US federal funds rate 6 5.9 4.1 1.5 1.5 1.5 Downside 1 UK GDP 1 0.4 (1.0) 1.0 1.9 1.5 UK unemployment 2 4.3 5.4 5.6 4.9 4.6 UK HPI 3 (2.4) (11.5) 2.9 9.9 5.5 UK bank rate 6 5.5 4.1 2.4 2.3 2.3 US GDP 1 2.0 (0.6) 1.6 2.4 1.8 US unemployment 4 4.1 5.2 5.3 4.7 4.5 US HPI 5 2.1 (4.0) 2.7 5.6 4.3 US federal funds rate 6 5.6 4.3 2.8 2.6 2.6 Upside 2 UK GDP 1 1.1 3.9 3.2 2.6 2.3 UK unemployment 2 4.1 3.4 3.4 3.3 3.2 UK HPI 3 4.9 14.2 6.8 2.7 3.8 UK bank rate 6 4.9 3.4 2.6 2.6 2.5 US GDP 1 2.6 3.2 2.9 2.8 2.8 US unemployment 4 3.7 3.5 3.4 3.4 3.4 US HPI 5 5.3 3.9 5.0 4.6 4.6 US federal funds rate 6 5.2 3.7 3.1 2.8 2.8 Upside 1 UK GDP 1 0.9 2.5 2.4 2.2 2.0 UK unemployment 2 4.2 3.9 3.9 3.9 3.8 UK HPI 3 1.8 7.8 4.9 3.6 3.5 UK bank rate 6 5.0 3.8 3.2 3.1 3.0 US GDP 1 2.4 2.5 2.4 2.4 2.4 US unemployment 4 3.8 3.8 3.8 3.8 3.8 US HPI 5 4.3 3.5 4.2 3.9 3.9 US federal funds rate 6 5.3 4.1 3.5 3.3 3.3 1. Average Real GDP seasonally adjusted change in year. 2. Average UK unemployment rate 16-year+. 3. Change in year end UK HPI = Halifax All Houses, All Buyers index, relative to prior year end. 4. Average US civilian unemployment rate 16-year+. 5. Change in year end US HPI = FHFA House Price Index, relative to prior year end. 6. Average rate. Macroeconomic variables used in the calculation of ECL As at 31 December 2023 2023 2024 2025 2026 2027 Baseline % % % % % UK GDP 1 0.5 0.3 1.2 1.6 1.6 UK unemployment 2 4.2 4.7 4.7 4.8 5.0 UK HPI 3 (3.3) (5.1) 0.7 3.1 5.3 UK bank rate 6 4.7 4.9 4.1 3.8 3.5 US GDP 1 2.4 1.3 1.7 1.9 1.9 US unemployment 4 3.7 4.3 4.3 4.3 4.3 US HPI 5 5.4 3.4 3.0 3.3 3.3 US federal funds rate 6 5.1 5.0 3.9 3.8 3.8 Downside 2 UK GDP 1 0.5 (1.5) (2.6) 2.4 1.6 UK unemployment 2 4.2 5.2 7.9 6.3 5.5 UK HPI 3 (3.3) (19.3) (16.8) 14.5 12.4 UK bank rate 6 4.7 6.6 1.3 1.0 1.0 US GDP 1 2.4 (0.6) (2.0) 3.1 2.0 US unemployment 4 3.7 5.2 7.2 5.9 5.2 US HPI 5 5.4 (6.5) (5.7) 7.2 6.4 US federal funds rate 6 5.1 6.3 1.8 1.5 1.5 Downside 1 UK GDP 1 0.5 (0.6) (0.7) 2.0 1.6 UK unemployment 2 4.2 4.9 6.3 5.6 5.2 UK HPI 3 (3.3) (12.4) (8.3) 8.7 8.8 UK bank rate 6 4.7 5.8 2.7 2.5 2.3 US GDP 1 2.4 0.3 (0.2) 2.5 1.9 US unemployment 4 3.7 4.7 5.8 5.1 4.8 US HPI 5 5.4 (1.7) (1.4) 5.2 4.8 US federal funds rate 6 5.1 5.7 2.9 2.8 2.8 Upside 2 UK GDP 1 0.5 2.4 3.7 2.9 2.4 UK unemployment 2 4.2 3.9 3.5 3.6 3.6 UK HPI 3 (3.3) 7.8 7.6 4.5 5.6 UK bank rate 6 4.7 4.3 2.7 2.5 2.5 US GDP 1 2.4 2.8 3.1 2.8 2.8 US unemployment 4 3.7 3.5 3.6 3.6 3.6 US HPI 5 5.4 6.1 4.3 4.5 4.6 US federal funds rate 6 5.1 4.3 2.9 2.8 2.8 Upside 1 UK GDP 1 0.5 1.4 2.5 2.3 2.0 UK unemployment 2 4.2 4.3 4.1 4.2 4.3 UK HPI 3 (3.3) 1.2 4.1 3.8 5.4 UK bank rate 6 4.7 4.6 3.4 3.3 3.0 US GDP 1 2.4 2.0 2.4 2.4 2.4 US unemployment 4 3.7 3.9 3.9 4.0 4.0 US HPI 5 5.4 4.7 3.7 3.9 3.9 US federal funds rate 6 5.1 4.7 3.5 3.3 3.3 1. Average Real GDP seasonally adjusted change in year. 2. Average UK unemployment rate 16-year+. 3. Change in year end UK HPI = Halifax All Houses, All Buyers index, relative to prior year end. 4. Average US civilian unemployment rate 16-year+. 5. Change in year end US HPI = FHFA House Price Index, relative to prior year end. 6. Average rate. Scenario probability weighting Upside 2 Upside 1 Baseline Downside 1 Downside 2 % % % % % As at 30 June 2024 Scenario probability weighting 16.5 26.1 32.6 16.2 8.6 As at 31 December 2023 Scenario probability weighting 13.8 24.7 32.4 18.3 10.8 Specific bases show the most extreme position of each variable in the context of the downside/upside scenarios, for example, the highest unemployment for downside scenarios, average unemployment for baseline scenarios and lowest unemployment for upside scenarios. GDP and HPI downside and upside scenario data represents the lowest and highest cumulative position relative to the start point in the 20 quarter period. Macroeconomic variables (specific bases) 1 Upside 2 Upside 1 Baseline Downside 1 Downside 2 As at 30 June 2024 % % % % % UK GDP 2 15.1 11.5 1.4 (0.7) (3.7) UK unemployment 3 3.1 3.8 4.4 6.2 8.0 UK HPI 4 36.5 23.4 2.2 (14.6) (28.2) UK bank rate 3 2.5 3.0 4.0 6.5 8.5 US GDP 2 14.8 12.3 2.0 (0.2) (3.3) US unemployment 3 3.4 3.8 4.1 5.7 7.3 US HPI 4 25.7 21.5 3.2 (2.0) (10.6) US federal funds rate 3 2.8 3.3 4.3 6.6 8.5 As at 31 December 2023 UK GDP 2 13.4 9.6 1.1 (1.3) (4.1) UK unemployment 3 3.5 3.9 4.7 6.5 8.3 UK HPI 4 23.8 11.5 0.1 (22.5) (35.0) UK bank rate 3 2.5 3.0 4.2 6.8 8.5 US GDP 2 15.1 12.3 1.8 0.6 (1.7) US unemployment 3 3.4 3.5 4.2 5.9 7.5 US HPI 4 27.4 23.5 3.7 0.4 (7.6) US federal funds rate 3 2.8 3.3 4.3 6.8 8.5 1 UK GDP = Real GDP growth seasonally adjusted; UK unemployment = UK unemployment rate 16-year+; UK HI = Halifax All Houses, All Buyers Index; US GDP = Real GDP growth seasonally adjusted; US unemployment = US civilian unemployment rate 16-year+; US HPI = FHFA House Price Index. 20 quarter period starts from Q124 (2023: Q123). 2 Maximum growth relative to Q423 (2023: Q422), based on 20 quarter period in Upside scenarios; 5-year yearly average Compound Annual Growth Rate (CAGR) in Baseline; minimum growth relative to Q423 (2023: Q422), based on 20 quarter period in Downside scenarios. 3 Lowest quarter in 20 quarter period in Upside scenarios; 5-year average in Baseline; highest quarter 20 quarter period in Downside scenarios. 4 Maximum growth relative to Q423 (2023: Q422), based on 20 quarter period in Upside scenarios; 5-year quarter end CAGR in Baseline; minimum growth relative to Q423 (2023: Q422), based on 20 quarter period in Downside scenarios. Average basis represents the average quarterly value of variables in the 20 quarter period with GDP and HPI based on yearly average and quarterly CAGRs respectively. Macroeconomic variables (5-year averages) 1 Upside 2 Upside 1 Baseline Downside 1 Downside 2 As at 30 June 2024 % % % % % UK GDP 2 2.6 2.0 1.4 0.8 0.2 UK unemployment 3 3.5 3.9 4.4 5.0 5.5 UK HPI 4 6.4 4.3 2.2 0.6 (1.1) UK bank rate 3 3.2 3.6 4.0 3.3 2.6 US GDP 2 2.9 2.4 2.0 1.5 0.9 US unemployment 3 3.5 3.8 4.1 4.7 5.4 US HPI 4 4.7 4.0 3.2 2.1 0.9 US federal funds rate 3 3.5 3.9 4.3 3.6 2.9 As at 31 December 2023 UK GDP 2 2.4 1.7 1.1 0.6 0.1 UK unemployment 3 3.7 4.2 4.7 5.2 5.8 UK HPI 4 4.4 2.2 0.1 (1.7) (3.5) UK bank rate 3 3.3 3.8 4.2 3.6 2.9 US GDP 2 2.8 2.3 1.8 1.4 0.9 US unemployment 3 3.6 3.9 4.2 4.8 5.4 US HPI 4 5.0 4.3 3.7 2.4 1.2 US federal funds rate 3 3.6 4.0 4.3 3.9 3.2 1 UK GDP = Real GDP growth seasonally adjusted; UK unemployment = UK unemployment rate 16-year+; UK HPI = Halifax All Houses, All Buyers Index; US GDP = Real GDP growth seasonally adjusted; US unemployment = US civilian unemployment rate 16-year+; US HPI = FHFA House Price Index. 2 5-year yearly average CAGR, starting 2023 (2023: 2022). 3 5-year average. Period based on 20 quarters from Q124 (2023: Q123). 4 5-year quarter end CAGR, starting Q423 (2023: Q422). Management VaR (95%) by asset class Half year ended 30.06.24 Half year ended 31.12.23 Half year ended 30.06.23 Average High Low Average High Low Average High Low £m £m £m £m £m £m £m £m £m Credit risk 22 27 19 32 40 22 48 57 38 Interest rate risk 16 25 9 15 24 10 16 25 9 Equity risk 6 9 4 5 9 3 6 10 3 Basis risk 6 8 4 10 13 8 15 24 11 Spread risk 5 7 4 7 10 6 10 14 7 Foreign exchange risk 4 9 2 4 9 1 3 6 1 Commodity risk — 1 — — 1 — — 1 — Inflation risk 4 5 2 4 6 2 9 11 6 Diversification effect 1 (34) n/a n/a (38) n/a n/a (62) n/a n/a Total management VaR 29 36 20 39 55 24 45 60 35 1 Diversification effects recognise that forecast losses from different assets or businesses are unlikely to occur concurrently, hence the expected aggregate loss is lower than the sum of the expected losses from each area. Historical correlations between losses are taken into account in making these assessments. The high and low VaR figures reported for each category did not necessarily occur on the same day as the high and low total management VaR. Consequently, a diversification effect balance for the high and low VaR figures would not be meaningful and is therefore omitted from the above table.

Basis of preparation

Basis of preparation	6 Months Ended
	Jun. 30, 2024
Disclosure of initial application of standards or interpretations [abstract]
Basis of preparation	Basis of preparation These condensed consolidated interim financial statements (“the financial statements”) for the six months ended 30 June 2024 have been prepared in accordance with (a) the Disclosure Guidance and Transparency Rules (DTR) of the UK’s Financial Conduct Authority (FCA), (b) the Transparency (Directive 2004/109/EC) Regulations 2007 of Ireland (as amended), and (c) (i) UK adopted IAS 34, Interim Financial Reporting (ii) IAS 34, Interim Financial Reporting, as published by the International Accounting Standards Board (IASB), and (iii) IAS 34, Interim Financial Reporting as adopted pursuant to Regulation (EC) No 1606/2002 as it applies in the European Union (EU). UK adopted IAS 34 and EU adopted IAS 34 are currently the same and were the same as at 31 December 2023. The condensed consolidated interim financial statements should be read in conjunction with the annual financial statements for the year ended 31 December 2023. The annual financial statements for the year ended 31 December 2023 were prepared in accordance with the requirements of the Companies Act 2006 and in accordance with (i) UK-adopted international accounting standards (ii) International Financial Reporting Standards (IFRS) and interpretations (IFRICs) as issued by the IASB, and (iii) IFRS adopted pursuant to Regulation (EC) No 1606/2002 as it applies in the EU. UK adopted IFRS and EU adopted IFRS are currently the same and were the same as at 31 December 2023. The accounting policies and methods of computation used in these condensed consolidated interim financial statements are the same as those used in the Barclays Bank PLC Annual Report 2023. 1. Going concern The financial statements are prepared on a going concern basis, as the Directors are satisfied that the Barclays Bank Group and parent company have the resources to continue in business for a period of at least 12 months from approval of the interim financial statements. In making this assessment, the Directors have considered a wide range of information relating to present and future conditions which includes a review of a working capital report (WCR). The WCR is used by the Directors to assess the future performance of the Barclays Bank Group and that it has the resources in place that are required to meet its ongoing regulatory requirements. The WCR includes an assessment of the impact of internally generated stress testing scenarios on the liquidity and capital requirements forecasts. The stress tests used were based upon an assessment of reasonably possible downside economic scenarios that the Barclays Bank Group could experience. The WCR indicated that the Barclays Bank Group had sufficient capital in place to support its future business requirements and remained above its regulatory minimum requirements in the internal stress scenarios. 2. Other disclosures The Credit risk disclosures on pages 7 19

Segmental reporting

Segmental reporting	6 Months Ended
	Jun. 30, 2024
Disclosure of operating segments [abstract]
Segmental reporting	Segmental reporting From 2024, the Barclays Bank Group presents its reporting segments through the following operating divisions, in addition to Head Office: – Barclays UK Corporate Bank – Barclays Private Bank and Wealth Management – Barclays Investment Bank – Barclays US Consumer Bank For more information about each reporting segment, refer to page 2 Analysis of results by business Barclays UK Corporate Bank Barclays Private Bank and Wealth Management Barclays Investment Bank Barclays US Consumer Bank Head Office Barclays Bank Group Half year ended 30.06.24 £m £m £m £m £m £m Net interest income 604 376 654 1,347 134 3,115 Non-interest income / (expense) 308 272 5,905 344 (250) 6,579 Total income 912 648 6,559 1,691 (116) 9,694 Operating costs (492) (454) (3,963) (807) (349) (6,065) UK regulatory levies 1 (30) (3) (33) — — (66) Litigation and conduct — 1 (11) (4) (42) (56) Total operating expenses (522) (456) (4,007) (811) (391) (6,187) Other net income 2 — — — — 1 1 Profit/(loss) before impairment 390 192 2,552 880 (506) 3,508 Credit impairment (charge)/release (23) 3 (34) (719) (58) (831) Profit/(loss) before tax 367 195 2,518 161 (564) 2,677 As at 30.06.24 £bn £bn £bn £bn £bn £bn Total assets 64.0 35.8 1,121.9 32.0 30.3 1,284.0 Total liabilities 87.3 65.3 1,043.1 21.5 7.7 1,224.9 Barclays UK Corporate Bank Barclays Private Bank and Wealth Management Barclays Investment Bank Barclays US Consumer Bank Head Office Barclays Bank Group Half year ended 30.06.23 £m £m £m £m £m £m Net interest income 644 377 863 1,262 (26) 3,120 Non-interest income 330 192 5,636 337 189 6,684 Total income 974 569 6,499 1,599 163 9,804 Operating costs (457) (340) (3,956) (837) (362) (5,952) UK regulatory levies 1 — — — — — — Litigation and conduct — — 2 (4) (32) (34) Total operating expenses (457) (340) (3,954) (841) (394) (5,986) Other net (expense)/income 2 2 — — 1 (1) 2 Profit/(loss) before impairment 519 229 2,545 759 (232) 3,820 Credit impairment (charge)/release 60 (10) (102) (585) (51) (688) Profit/(loss) before tax 579 219 2,443 174 (283) 3,132 As at 31.12.23 £bn £bn £bn £bn £bn £bn Total assets 61.6 32.1 1,027.6 33.4 30.5 1,185.2 Total liabilities 86.8 61.0 948.9 21.2 6.8 1,124.7 1 Comprises the impact of the BoE levy scheme and the UK bank levy. 2 Other net income represents the share of post-tax results of associates and joint ventures. Split of income by geographic region 1 Half year ended 30.06.24 Half year ended 30.06.23 £m £m United Kingdom 3,185 3,555 Europe 1,190 1,255 Americas 4,617 4,234 Africa and Middle East 39 42 Asia 663 718 Total 9,694 9,804 1

Net fee and commission income

Net fee and commission income	6 Months Ended
	Jun. 30, 2024
Fee and commission income (expense) [abstract]
Net fee and commission income	Net fee and commission income Fee and commission income is disaggregated below and includes a total for fees in scope of IFRS 15, Revenue from Contracts with Customers: Barclays UK Corporate Bank Barclays Private Bank and Wealth Management Barclays Investment Bank Barclays US Consumer Bank Head Office Barclays Bank Group Half year ended 30.06.24 £m £m £m £m £m £m Fee type Transactional 228 16 171 1,320 160 1,895 Advisory — 156 325 — — 481 Brokerage and execution — 62 777 — — 839 Underwriting and syndication 46 — 1,391 — — 1,437 Other 6 2 35 — 11 54 Total revenue from contracts with customers 280 236 2,699 1,320 171 4,706 Other non-contract fee income 11 — 58 — — 69 Fee and commission income 291 236 2,757 1,320 171 4,775 Fee and commission expense (46) (19) (520) (893) (49) (1,527) Net fee and commission income 245 217 2,237 427 122 3,248 Barclays UK Corporate Bank Barclays Private Bank and Wealth Management Barclays Investment Bank Barclays US Consumer Bank Head Office Barclays Bank Group Half year ended 30.06.23 £m £m £m £m £m £m Fee type Transactional 212 13 160 1,290 150 1,825 Advisory — 94 363 — — 457 Brokerage and execution — 44 998 — — 1,042 Underwriting and syndication 39 — 997 — — 1,036 Other 8 2 43 5 35 93 Total revenue from contracts with customers 259 153 2,561 1,295 185 4,453 Other non-contract fee income 15 3 56 — — 74 Fee and commission income 274 156 2,617 1,295 185 4,527 Fee and commission expense (50) (15) (742) (870) (44) (1,721) Net fee and commission income 224 141 1,875 425 141 2,806 Transactional fees are service charges on deposit accounts, cash management services and transactional processing fees. These include interchange and merchant fee income generated from credit and bank card usage. Advisory fees are generated from wealth management services and investment banking advisory services related to mergers, acquisitions and financial restructurings. Brokerage and execution fees are earned for executing client transactions with various exchanges and over-the-counter markets and assisting clients in clearing transactions and facilitating foreign exchange transactions for spot/forward contracts. Underwriting and syndication fees are earned for the distribution of client equity or debt securities and the arrangement and administration of a loan syndication. These include commitment fees to provide loan financing.

Dividends on ordinary shares an

Dividends on ordinary shares and preference shares	6 Months Ended
	Jun. 30, 2024
Dividends [Abstract]
Dividends on ordinary shares and preference shares	Dividends on ordinary shares and preference shares Half year ended 30.06.24 Half year ended 30.06.23 Dividends paid during the period £m £m Ordinary shares 852 700 Preference shares 21 19 Total 873 719

Fair value of financial instrum

Fair value of financial instruments	6 Months Ended
	Jun. 30, 2024
Disclosure of fair value measurement of assets [abstract]
Fair value of financial instruments	Fair value of financial instruments This section should be read in conjunction with Note 16, Fair value of financial instruments of the Barclays Bank PLC Annual Report 2023, which provides more detail about accounting policies adopted, valuation methodologies used in calculating fair value and the valuation control framework which governs oversight of valuations. There have been no changes in the accounting policies adopted or the valuation methodologies used. Valuation The following table shows the Barclays Bank Group’s assets and liabilities that are held at fair value disaggregated by valuation technique (fair value hierarchy) and balance sheet classification: Valuation technique using Quoted market prices Observable inputs Significant unobservable inputs (Level 1) (Level 2) (Level 3) Total As at 30.06.24 £m £m £m £m Trading portfolio assets 98,942 89,613 8,726 197,281 Financial assets at fair value through the income statement 7,416 198,865 7,024 213,305 Derivative financial instruments 86 249,337 2,821 252,244 Financial assets at fair value through other comprehensive income 21,930 29,692 2,400 54,022 Investment property — — 1 1 Total assets 128,374 567,507 20,972 716,853 Trading portfolio liabilities (32,666) (25,621) (385) (58,672) Financial liabilities designated at fair value (182) (318,426) (2,474) (321,082) Derivative financial instruments (66) (237,664) (4,335) (242,065) Total liabilities (32,914) (581,711) (7,194) (621,819) As at 31.12.23 Trading portfolio assets 94,615 73,442 6,509 174,566 Financial assets at fair value through the income statement 5,747 193,121 5,368 204,236 Derivative financial instruments 107 252,464 3,540 256,111 Financial assets at fair value through other comprehensive income 21,079 29,568 776 51,423 Investment property — — 2 2 Total assets 121,548 548,595 16,195 686,338 Trading portfolio liabilities (28,380) (29,013) (368) (57,761) Financial liabilities designated at fair value (117) (297,244) (1,212) (298,573) Derivative financial instruments (81) (245,146) (4,653) (249,880) Total liabilities (28,578) (571,403) (6,233) (606,214) The following table shows the Barclays Bank Group’s Level 3 assets and liabilities that are held at fair value disaggregated by product type: As at 30.06.24 As at 31.12.23 Assets Liabilities Assets Liabilities £m £m £m £m Interest rate derivatives 1,622 (1,538) 2,211 (1,701) Foreign exchange derivatives 175 (118) 111 (91) Credit derivatives 216 (798) 241 (820) Equity derivatives 808 (1,881) 977 (2,041) Corporate debt 2,211 (353) 1,568 (352) Reverse repurchase and repurchase agreements 620 (934) 209 (517) Loans 11,404 — 8,986 — Private equity investments 183 — 145 — Asset backed securities 2,145 (2) 605 — Issued debt — (1,539) — (637) Other 1 1,588 (31) 1,142 (74) Total 20,972 (7,194) 16,195 (6,233) 1 Other includes funds and fund-linked products, Government and Government sponsored debt, equities cash products and investment property. Assets and liabilities reclassified between Level 1 and Level 2 During the six-month period ended 30 June 2024 there were no material transfers between Level 1 and Level 2 (year ended December 2023: no material transfers between Level 1 and Level 2). Level 3 movement analysis The following table summarises the movements in the balances of Level 3 assets and liabilities during the period. The table shows gains and losses and includes amounts for all financial assets and liabilities that are held at fair value transferred to and from Level 3 during the period. Transfers have been reflected as if they had taken place at the beginning of the period. Asset and liability movements between Level 2 and Level 3 are primarily due to i) an increase or decrease in observable market activity related to an input or ii) a change in the significance of the unobservable input, with assets and liabilities classified as Level 3 if an unobservable input is deemed significant. Level 3 movement analysis Purchases Sales Issues Settle- ments Total gains and (losses) in the period recognised in the income statement Total gains or (losses) recognised in OCI Transfers As at 30.06.24 As at 01.01.24 Trading income Other income In Out £m £m £m £m £m £m £m £m £m £m £m Corporate debt 679 833 (225) — (49) (56) — — 144 (21) 1,305 Loans 4,469 1,478 (247) — (661) 42 — — 139 (10) 5,210 Asset backed securities 318 39 (196) — — 23 — — 611 (65) 730 Other 1,043 763 (339) — (4) (16) — — 152 (118) 1,481 Trading portfolio assets 6,509 3,113 (1,007) — (714) (7) — — 1,046 (214) 8,726 Corporate debt 889 — (3) — — 13 7 — — — 906 Loans 3,984 1,760 (1,000) — (266) (21) 18 — 138 (61) 4,552 Private equity investments 145 37 (2) — (4) 2 5 — — — 183 Reverse repurchase and repurchase agreements 209 297 — — — — — — 141 (27) 620 Asset backed securities 85 590 (1) — (12) 1 — — 9 (14) 658 Other 56 48 — — — (1) 4 — 2 (4) 105 Financial assets at fair value through the income statement 5,368 2,732 (1,006) — (282) (6) 34 — 290 (106) 7,024 Loans 533 1,097 — — — 1 11 — — — 1,642 Asset backed securities 200 757 — — — — — — — (200) 757 Other 43 — (42) — — — — — — — 1 Financial assets at fair value through other comprehensive income 776 1,854 (42) — — 1 11 — — (200) 2,400 Investment property 2 — (1) — — — — — — — 1 Trading portfolio liabilities (368) (28) 17 — — 18 — — (30) 6 (385) Financial liabilities designated at fair value (1,212) 1 9 (628) 16 (27) — — (881) 248 (2,474) Interest rate derivatives 510 10 — — (136) (158) — — 31 (173) 84 Foreign exchange derivatives 20 (1) — — 18 6 — — 21 (7) 57 Credit derivatives (579) 5 33 — — (22) — — (22) 3 (582) Equity derivatives (1,064) (195) — (19) (53) (19) — — (9) 286 (1,073) Net derivative financial instruments 1 (1,113) (181) 33 (19) (171) (193) — — 21 109 (1,514) Total 9,962 7,491 (1,997) (647) (1,151) (214) 45 — 446 (157) 13,778 1 Derivative financial instruments are presented on a net basis. On a gross basis, derivative financial assets were £2,821m and derivative financial liabilities were £(4,335)m. Level 3 movement analysis Purchases Sales Issues Settle- ments Total gains and (losses) in the period recognised in the income statement Total gains or (losses) recognised in OCI Transfers As at 30.06.23 As at 01.01.23 Trading income Other income In Out £m £m £m £m £m £m £m £m £m £m £m Corporate debt 595 338 (118) — (53) 5 — — 36 (29) 774 Loans 4,837 919 (1,152) — (311) 4 — — 556 (334) 4,519 Asset backed securities 175 324 (278) — — (11) — — 288 (60) 438 Other 873 704 (328) — (38) (32) — — 142 (253) 1,068 Trading portfolio assets 6,480 2,285 (1,876) — (402) (34) — — 1,022 (676) 6,799 Corporate debt 1,079 — (120) — — (20) (3) — — — 936 Loans 4,553 1,839 (823) — (613) (44) (42) — 28 (106) 4,792 Private equity investments 140 — — — (5) (5) 8 — — — 138 Reverse repurchase and repurchase agreements 38 — — — — (11) — — 46 (29) 44 Asset backed securities 192 8 (2) — — (13) — — 21 (16) 190 Other 109 — (10) — (20) 1 (10) — 1 — 71 Financial assets at fair value through the income statement 6,111 1,847 (955) — (638) (92) (47) — 96 (151) 6,171 Loans — 47 — — — — — — — — 47 Asset backed securities 3 — — — (1) — — — — — 2 Other 1 — — — — — — — — — 1 Financial assets at fair value through other comprehensive income 4 47 — — (1) — — — — — 50 Investment property 5 — — — — — (3) — — — 2 Trading portfolio liabilities (56) (16) 4 — — 15 — — (8) 9 (52) Financial liabilities designated at fair value (1,042) — — (226) — 4 (1) — (290) 463 (1,092) Interest rate derivatives (497) — — — 19 (35) — — 544 446 477 Foreign exchange derivatives 39 — — — — (31) — — 13 (15) 6 Credit derivatives (313) (191) 5 — 66 13 — — 52 16 (352) Equity derivatives (419) (90) — — (132) (135) — — (104) 12 (868) Net derivative financial instruments 1 (1,190) (281) 5 — (47) (188) — — 505 459 (737) Total 10,312 3,882 (2,822) (226) (1,088) (295) (51) — 1,325 104 11,141 1 Derivative financial instruments are presented on a net basis. On a gross basis, derivative financial assets were £4,532m and derivative financial liabilities were £(5,269)m. Unrealised gains and losses on Level 3 financial assets and liabilities The following table discloses the unrealised gains and losses recognised in the period arising on Level 3 financial assets and liabilities held at the period end. Half year ended 30.06.24 Half year ended 30.06.23 Income statement Other compre-hensive income Total Income statement Other compre-hensive income Total Trading income Other income Trading income Other income £m £m £m £m £m £m £m £m Trading portfolio assets (2) — — (2) (35) — — (35) Financial assets at fair value through the income statement 15 30 — 45 (87) (50) — (137) Financial assets at fair value through other comprehensive income (2) 11 — 9 — — — — Investment properties — — — — — (3) — (3) Trading portfolio liabilities 17 — — 17 15 — — 15 Financial liabilities designated at fair value (29) — — (29) 2 (1) — 1 Net derivative financial instruments (191) — — (191) (186) — — (186) Total (192) 41 — (151) (291) (54) — (345) Valuation techniques and sensitivity analysis Sensitivity analysis is performed on products with significant unobservable inputs (Level 3) to generate a range of reasonably possible alternative valuations. The sensitivity methodologies applied take account of the nature of valuation techniques used, as well as the availability and reliability of observable proxy and historical data and the impact of using alternative models. Sensitivities are dynamically calculated on a monthly basis. The calculation is based on range or spread data of a reliable reference source or a scenario based on relevant market analysis alongside the impact of using alternative models. Sensitivities are calculated without reflecting the impact of any diversification in the portfolio. Current period valuation and sensitivity methodologies are consistent with those described within Note 16, Fair value of financial instruments in the Barclays Bank PLC Annual Report 2023. Sensitivity analysis of valuations using unobservable inputs (Relates to Level 3 Portfolios) As at 30.06.24 As at 31.12.23 Favourable changes Unfavourable changes Favourable changes Unfavourable changes Income statement Equity Income Statement Equity Income statement Equity Income Statement Equity £m £m £m £m £m £m £m £m Interest rate derivatives 99 — (170) — 78 — (158) — Foreign exchange derivatives 6 — (10) — 4 — (9) — Credit derivatives 11 — (15) — 27 — (32) — Equity derivatives 202 — (289) — 142 — (226) — Corporate debt 55 — (31) — 34 — (22) — Loans 633 32 (830) (32) 545 2 (763) (2) Private equity investments 30 — (30) — 9 — (9) — Asset Backed Securities 39 4 (29) (4) 36 1 (27) (1) Other 1 93 — (106) — 90 — (91) — Total 1,168 36 (1,510) (36) 965 3 (1,337) (3) 1 Other includes Equity cash products, Fund and fund-linked products, Issued debt, Commercial paper, Government and Government sponsored debt and Investment property. The effect of stressing unobservable inputs to a range of reasonably possible alternatives, alongside considering the impact of using alternative models, would be to increase fair values by up to £1,204m (December 2023: £968m) or to decrease fair values by up to £1,546m (December 2023: £1,340m) with substantially all the potential effect impacting profit and loss rather than reserves. Significant unobservable inputs The valuation techniques and significant unobservable inputs for assets and liabilities recognised at fair value and classified as Level 3 are consistent with those set out in Note 16, Fair value of financial instruments in the Barclays Bank PLC Annual Report 2023. Fair value adjustments Key balance sheet valuation adjustments are quantified below: As at 30.06.24 As at 31.12.23 £m £m Exit price adjustments derived from market bid-offer spreads (498) (558) Uncollateralised derivative funding 5 (4) Derivative credit valuation adjustments (190) (209) Derivative debit valuation adjustments 111 144 • Exit price adjustments derived from market bid-offer spreads decreased by £60m to £(498)m. • Uncollateralised derivative funding moved marginally from £(4)m to £5m. • Derivative credit valuation adjustments decreased by £19m to £(190)m as a result of reduced uncollateralised asset exposure profile. • Derivative debit valuation adjustments decreased by £33m to £111m as a result of the tightening of input credit spreads. Portfolio exemption The Barclays Bank Group uses the portfolio exemption in IFRS 13, Fair Value Measurement to measure the fair value of groups of financial assets and liabilities. Financial instruments are measured using the price that would be received to sell a net long position (i.e., an asset) for a particular risk exposure or to transfer a net short position (i.e., a liability) for a particular risk exposure in an orderly transaction between market participants at the balance sheet date under current market conditions. Accordingly, the Barclays Bank Group measures the fair value of the group of financial assets and liabilities consistently with how market participants would price the net risk exposure at the measurement date. Unrecognised gains as a result of the use of valuation models using unobservable inputs The amount that is yet to be recognised in income that relates to the difference between the transaction price (the fair value at initial recognition) and the amount that would have arisen had valuation models using unobservable inputs been used on initial recognition, less amounts subsequently recognised, is £213m (December 2023: £194m) for financial instruments measured at fair value and £17m (December 2023: £18m) for financial instruments carried at amortised cost. There are additions and FX gains of £85m (December 2023: £136m) and amortisation and releases of £66m (December 2023: £48m) in amounts attributable to financial instruments measured at fair value and amortisation and releases of £1m (December 2023: £7m) and additions of £nil (December 2023: £nil) in amounts attributable to financial instruments carried at amortised cost. Third party credit enhancements Structured and brokered certificates of deposit issued by the Barclays Bank Group are insured up to $250,000 per depositor by the Federal Deposit Insurance Corporation (FDIC) in the United States. The FDIC is funded by premiums that the Barclays Bank Group and other banks pay for deposit insurance coverage. The carrying value of these issued certificates of deposit that are designated under the IFRS 9 fair value option includes this third-party credit enhancement. The on-balance sheet value of these brokered certificates of deposit amounted to £3,829m (December 2023: £5,162m). Comparison of carrying amounts and Valuation methodologies employed in calculating the fair value of financial assets and liabilities measured at amortised cost are consistent with those described within Note 16, Fair value of financial instruments in the Barclays Bank PLC Annual Report 2023. The following table summarises the fair value of financial assets and liabilities measured at amortised cost on the Barclays Bank Group’s balance sheet: As at 30.06.24 As at 31.12.23 Carrying amount Fair value Carrying amount Fair value Financial assets £m £m £m £m Debt securities at amortised cost 44,799 43,887 39,046 37,807 Loans and advances at amortised cost 145,773 147,555 146,201 147,323 Reverse repurchase agreements and other similar secured lending 2,980 2,980 1,103 1,103 Financial liabilities Deposits at amortised cost (324,012) (324,092) (301,798) (301,851) Repurchase agreements and other similar secured borrowing (39,533) (39,533) (28,554) (28,554) Debt securities in issue (43,078) (42,994) (45,653) (45,557) Subordinated liabilities (37,849) (39,602) (35,903) (37,295)

Subordinated liabilities

Subordinated liabilities	6 Months Ended
	Jun. 30, 2024
Subordinated liabilities [abstract]
Subordinated liabilities	Subordinated liabilities Half year ended 30.06.24 Year ended 31.12.23 £m £m Opening balance as at 1 January 35,903 38,253 Issuances 7,354 5,986 Redemptions (4,804) (7,431) Other (604) (905) Closing balance 37,849 35,903 Designated at fair value (Note 5) 543 579 Total subordinated liabilities 38,392 36,482 Issuances of £7,354m comprise £5,999m intra-group loans from Barclays PLC, £1,276m EUR 4.973% Fixed Rate Resetting Tier 2 Subordinated Callable Notes issued to Barclays PLC and £79m USD Floating Rate Notes issued externally by a Barclays Bank PLC subsidiary. Redemptions of £4,804m comprise intra-group loans from Barclays PLC. Other movements predominantly comprise foreign exchange movements and fair value hedge adjustments.

Provisions

Provisions	6 Months Ended
	Jun. 30, 2024
Provisions [abstract]
Provisions	Provisions As at 30.06.24 As at 31.12.23 £m £m Customer redress 18 21 Legal, competition and regulatory matters 54 59 Redundancy and restructuring 91 126 Undrawn contractually committed facilities and guarantees 452 473 Sundry provisions 142 138 Total 757 817

Retirement benefits

Retirement benefits	6 Months Ended
	Jun. 30, 2024
Disclosure of defined benefit plans [abstract]
Retirement benefits	Retirement benefits As at 30 June 2024, the Barclays Bank Group’s IAS 19 net retirement benefit assets were £3.4bn (December 2023: £3.5bn). The UK Retirement Fund (UKRF), which is the Barclays Bank Group’s main scheme, had an IAS 19 net surplus of £3.5bn (December 2023: £3.6bn).

Other reserves

Other reserves	6 Months Ended
	Jun. 30, 2024
Disclosure of reserves within equity [abstract]
Other reserves	Other reserves As at 30.06.24 As at 31.12.23 £m £m Currency translation reserve 3,676 3,783 Fair value through other comprehensive income reserve (1,493) (1,207) Cash flow hedging reserve (3,064) (2,895) Own credit reserve (702) (240) Other reserves 196 196 Total (1,387) (363) Currency translation reserve The currency translation reserve represents the cumulative gains and losses on the retranslation of the Barclays Bank Group’s net investment in foreign operations, net of the effects of hedging. As at 30 June 2024, there was a cumulative gain of £3,676m (December 2023: £3,783m gain) in the currency translation reserve, a loss during the period of £107m. This principally reflects the GBP depreciating against USD during the period. Fair value through other comprehensive income reserve The fair value through other comprehensive income reserve represents the cumulative unrealised gains and losses on fair value through other comprehensive income investments since initial recognition. As at 30 June 2024, there was a cumulative loss of £1,493m (December 2023: £1,207m loss) in the fair value through other comprehensive income reserve. The loss during the period of £286m (2023: £135m gain) was principally driven by a £236m loss (2023: £293m gain) from the movement in fair value of bonds due to changes in bond yields and net gain of £158m (2023: £102m) transferred to the income statement and a tax credit of £107m (2023: tax charge £54m). Cash flow hedging reserve The cash flow hedging reserve represents the cumulative gains and losses on effective cash flow hedging instruments that will be recycled to the income statement when the hedged transactions affect profit or loss. As at 30 June 2024, there was a cumulative loss of £3,064m (December 2023: £2,895m loss) in the cash flow hedging reserve. The £169m loss in the period (2023: £2,661m gain) is driven by £1,162m loss (2023: £1,999m gain) from fair value movements on interest rate swaps as major interest rate forward curves increased (2023: decreased), this was offset by £935m of accumulated losses transferred to the income statement (2023: £1,665m losses) and a tax benefit of £58m (2023: tax charge of £1,003m). Own credit reserve The own credit reserve reflects the cumulative own credit gains and losses on financial liabilities at fair value. Amounts in the own credit reserve are not recycled to profit or loss in future periods. As at 30 June 2024, there was a cumulative loss of £702m (December 2023: £240m loss) in the own credit reserve and a loss during the period of £462m. This principally reflects a £635m loss from the tightening of credit spreads partially offset by a tax credit of £173m. Other reserves

Contingent liabilities and comm

Contingent liabilities and commitments	6 Months Ended
	Jun. 30, 2024
Disclosure of contingent liabilities [abstract]
Contingent liabilities and commitments	Contingent liabilities and commitments As at 30.06.24 As at 31.12.23 Contingent liabilities and financial guarantees £m £m Guarantees and letters of credit pledged as collateral security 17,272 17,578 Performance guarantees, acceptances and endorsements 9,553 9,251 Total 26,825 26,829 Commitments Documentary credits and other short-term trade related transactions 2,489 2,352 Standby facilities, credit lines and other commitments 347,530 335,583 Total 350,019 337,935 Further details on contingent liabilities, where it is not practicable to disclose an estimate of the potential financial effect on the Barclays Bank Group relating to legal and competition and regulatory matters can be found in Note 11 below.

Legal, competition and regulato

Legal, competition and regulatory matters	6 Months Ended
	Jun. 30, 2024
Legal, Competition And Regulatory Matters
Legal, competition and regulatory matters	Legal, competition and regulatory matters The Barclays Bank Group faces legal, competition and regulatory challenges, many of which are beyond our control. The extent of the impact of these matters cannot always be predicted but may materially impact our operations, financial results, condition and prospects. Matters arising from a set of similar circumstances can give rise to either a contingent liability or a provision, or both, depending on the relevant facts and circumstances. The recognition of provisions in relation to such matters involves critical accounting estimates and judgments in accordance with the relevant accounting policies applicable to Note 7, Provisions. We have not disclosed an estimate of the potential financial impact or effect on the Barclays Bank Group of contingent liabilities where it is not currently practicable to do so. Various matters detailed in this note seek damages of an unspecified amount. While certain matters specify the damages claimed, such claimed amounts do not necessarily reflect the Barclays Bank Group’s potential financial exposure in respect of those matters. Investigations into certain advisory services agreements and other proceedings FCA proceedings In 2008, Barclays Bank PLC and Qatar Holdings LLC entered into two advisory service agreements (the Agreements). The Financial Conduct Authority (FCA) conducted an investigation into whether the Agreements may have related to Barclays PLC’s capital raisings in June and November 2008 (the Capital Raisings) and therefore should have been disclosed in the announcements or public documents relating to the Capital Raisings. In 2013, the FCA issued warning notices (the Warning Notices) finding that Barclays PLC and Barclays Bank PLC acted recklessly and in breach of certain disclosure-related listing rules, and that Barclays PLC was also in breach of Listing Principle 3. The financial penalty provided in the Warning Notices was £50m. Barclays PLC and Barclays Bank PLC contested the findings. In 2022, the FCA’s Regulatory Decisions Committee (RDC) issued Decision Notices finding that Barclays PLC and Barclays Bank PLC breached certain disclosure-related listing rules. The RDC also found that in relation to the disclosures made in the Capital Raising of November 2008, Barclays PLC and Barclays Bank PLC acted recklessly, and that Barclays PLC breached Listing Principle 3. The RDC upheld the combined penalty of £50m on Barclays PLC and Barclays Bank PLC, the same penalty as in the Warning Notices. Barclays PLC and Barclays Bank PLC have referred the RDC’s findings to the Upper Tribunal for reconsideration. Other proceedings In 2023, Barclays received requests for arbitration from two Jersey special purpose vehicles connected to PCP International Finance Limited asserting claims in relation to the October 2008 capital raising. Barclays is defending these claims. Civil actions related to LIBOR and other benchmarks Various individuals and corporates in a range of jurisdictions have threatened or brought civil actions against the Barclays Bank Group and other banks in relation to the alleged manipulation of LIBOR and/or other benchmarks. USD LIBOR civil actions The majority of the USD LIBOR cases, which have been filed in various US jurisdictions, have been consolidated for pre-trial purposes in the US District Court in the Southern District of New York (SDNY). The complaints are substantially similar and allege, among other things, that Barclays PLC, Barclays Bank PLC, Barclays Capital Inc. (BCI) and other financial institutions individually and collectively violated provisions of the US Sherman Antitrust Act (Antitrust Act), the US Commodity Exchange Act (CEA), the US Racketeer Influenced and Corrupt Organizations Act (RICO), the US Securities Exchange Act of 1934 and various state laws by manipulating USD LIBOR rates. The remaining claims are individual actions seeking unspecified damages with the exception of one lawsuit, in which the plaintiffs sought no less than $100m in actual damages and additional punitive damages against all defendants, including Barclays Bank PLC. The parties have reached a settlement in principle in respect of such lawsuit. The financial impact of this settlement is not expected to be material to the Barclays Bank Group’s operating results, cash flows or financial position. Some of the other lawsuits also seek trebling of damages under the Antitrust Act and RICO. Sterling LIBOR civil actions In 2016, two putative class actions filed in the SDNY against Barclays Bank PLC, BCI and other Sterling LIBOR panel banks alleging, among other things, that the defendants manipulated the Sterling LIBOR rate in violation of the Antitrust Act, CEA and RICO, were consolidated. The defendants’ motion to dismiss the claims was granted in 2018. The plaintiffs have appealed the dismissal. ICE LIBOR civil action In 2020, an action related to the LIBOR benchmark administered by the Intercontinental Exchange Inc. and certain of its affiliates (ICE) was filed by a group of individual plaintiffs in the US District Court for the Northern District of California on behalf of individual borrowers and consumers of loans and credit cards with variable interest rates linked to USD ICE LIBOR. The defendants’ motion to dismiss the case was granted in 2022. The plaintiffs filed an amended complaint, which was dismissed in 2023. The plaintiffs are appealing the dismissal. Non-US benchmarks civil actions There remains one claim, issued in 2017, against Barclays Bank PLC and other banks in the UK in connection with alleged manipulation of LIBOR. Proceedings have also been brought in a number of other jurisdictions in Europe, Argentina and Israel relating to alleged manipulation of LIBOR and EURIBOR. Additional proceedings in other jurisdictions may be brought in the future. Foreign Exchange civil actions Various individuals and corporates in a range of jurisdictions have threatened or brought civil actions against the Barclays Bank Group and other banks in relation to alleged manipulation of Foreign Exchange markets. US retail basis civil action In 2015, a putative class action was filed against several international banks, including Barclays PLC and BCI, on behalf of a proposed class of individuals who exchanged currencies on a retail basis at bank branches (Retail Basis Claims). The SDNY has ruled that the Retail Basis Claims are not covered by the settlement agreement in the Consolidated FX Action. The Court subsequently dismissed all Retail Basis Claims against the Barclays Bank Group and all other defendants. The plaintiffs filed an amended complaint. The defendants’ motion for summary judgment was granted in 2023, dismissing the plaintiffs’ remaining claims. The plaintiffs appealed the decision and the dismissal was upheld by the appellate court in May 2024. The plaintiffs’ motion for reconsideration was denied. Non-US FX civil actions Legal proceedings have been brought or are threatened against Barclays PLC, Barclays Bank PLC, BCI and Barclays Execution Services Limited (BX) in connection with alleged manipulation of Foreign Exchange in the UK, a number of other jurisdictions in Europe, Israel, Brazil and Australia. Additional proceedings may be brought in the future. The above-mentioned proceedings include two purported class actions filed against Barclays PLC, Barclays Bank PLC, BX, BCI and other financial institutions in the UK Competition Appeal Tribunal (CAT) in 2019. The CAT refused to certify these claims in 2022 and in 2023, the Court of Appeal overturned the CAT’s decision and found that the claims should be certified on an opt out basis. The Court of Appeal upheld the CAT’s determination as to which of the two purported class representatives should be chosen to bring the claim. Barclays and the other financial institutions involved have obtained permission to appeal this decision to the UK Supreme Court. Metals-related civil actions A US civil complaint alleging manipulation of the price of silver in violation of the CEA, the Antitrust Act and state antitrust and consumer protection laws was brought by a proposed class of plaintiffs against a number of banks, including Barclays Bank PLC, BCI and BX, and transferred to the SDNY. The complaint was dismissed against these Barclays entities and certain other defendants in 2018, and against the remaining defendants in 2023. The plaintiffs have appealed the dismissal of the complaint against all defendants. Civil actions have also been filed in Canadian courts against Barclays PLC, Barclays Bank PLC, Barclays Capital Canada Inc. and BCI on behalf of proposed classes of plaintiffs alleging manipulation of gold and silver prices. US residential mortgage related civil action There remains one US Residential Mortgage-Backed Securities (RMBS) related civil action arising from unresolved repurchase requests submitted by Trustees for certain RMBS, alleging breaches of various loan-level representations and warranties (R&Ws) made by Barclays Bank PLC and/or a subsidiary acquired in 2007. Barclays’ motion to dismiss the action was denied in 2023. The parties are appealing the decision. Government and agency securities civil actions Treasury auction securities civil actions Consolidated putative class action complaints filed in US federal court against Barclays Bank PLC, BCI and other financial institutions under the Antitrust Act and state common law allege that the defendants (i) conspired to manipulate the US Treasury securities market and/or (ii) conspired to prevent the creation of certain platforms by boycotting or threatening to boycott such trading platforms. The court dismissed the consolidated action in 2021. The plaintiffs filed an amended complaint. The defendants’ motion to dismiss the amended complaint was granted in 2022. The plaintiffs appealed this decision, and in February 2024 the appellate court affirmed the dismissal. The plaintiffs did not seek US Supreme Court review, thereby concluding the matter. In addition, certain plaintiffs have filed a related, direct action against BCI and certain other financial institutions, alleging that defendants conspired to fix and manipulate the US Treasury securities market in violation of the Antitrust Act, the CEA and state common law. This action remains stayed. Supranational, Sovereign and Agency bonds civil actions Civil antitrust actions have been filed in the Federal Court of Canada in Toronto against Barclays Bank PLC, BCI, BX, Barclays Capital Securities Limited and Barclays Capital Canada, Inc. and other financial institutions alleging that the defendants conspired to fix prices and restrain competition in the market for US dollar-denominated Supranational, Sovereign and Agency bonds. The parties have reached a settlement, which has received preliminary court approval and has been paid. The financial impact of the settlement is not material to the Barclays Bank Group’s operating results, cash flows or financial position. Variable Rate Demand Obligations civil actions Civil actions have been filed against Barclays Bank PLC and BCI and other financial institutions alleging the defendants conspired or colluded to artificially inflate interest rates set for Variable Rate Demand Obligations (VRDOs). VRDOs are municipal bonds with interest rates that reset on a periodic basis, most commonly weekly. An action in state court has been filed by private plaintiffs on behalf of the state of California. Three putative class action complaints have been consolidated in the SDNY. In the consolidated SDNY class action, certain of the plaintiffs’ claims were dismissed in 2020 and 2022 and the plaintiffs’ motion for class certification was granted in 2023, which means the case may proceed as a class action. The defendants are appealing this decision. In the California action, the California appeals court reversed the dismissal of the plaintiffs’ claims in 2023. Odd-lot corporate bonds antitrust class action In 2020, BCI, together with other financial institutions, were named as defendants in a putative class action in the US. The complaint alleges a conspiracy to boycott developing electronic trading platforms for odd-lots and price fixing. The plaintiffs demand unspecified money damages. The defendants’ motion to dismiss was granted in 2021, which the plaintiffs appealed. In July 2024, the Second Circuit vacated the judgment and remanded the case to the SDNY for further proceedings. Credit Default Swap civil action A putative antitrust class action is pending in New Mexico federal court against Barclays Bank PLC, BCI and various other financial institutions. The plaintiffs, the New Mexico State Investment Council and certain New Mexico pension funds, allege that the defendants conspired to manipulate the benchmark price used to value Credit Default Swap (CDS) contracts at settlement (i.e., the CDS final auction price). The plaintiffs allege violations of US antitrust laws and the CEA, and unjust enrichment under state law. The defendants’ motion to dismiss was denied in 2023. Interest rate swap and credit default swap US civil actions Barclays PLC, Barclays Bank PLC and BCI, together with other financial institutions that act as market makers for interest rate swaps (IRS), are named as defendants in several antitrust actions, including one putative class action and individual actions brought by certain swap execution facilities, which are consolidated in the SDNY. The complaints allege the defendants conspired to prevent the development of exchanges for IRS and demand unspecified money damages. The parties have reached a settlement of the matter, which remains subject to final court approval. The financial impact of the settlement is not expected to be material to the Barclays Bank Group’s operating results, cash flows or financial position. In 2017, Tera Group Inc. (Tera) filed a separate civil antitrust action in the SDNY claiming that certain conduct alleged in the IRS cases also caused Tera to suffer harm with respect to the Credit Default Swaps market. In 2019, the court dismissed Tera’s claims for unjust enrichment and tortious interference but denied motions to dismiss the antitrust claims. Tera filed an amended complaint in 2020. Barclays’ motion to dismiss all claims was granted in 2023. Tera is appealing the decision. BDC Finance L.L.C. In 2008, BDC Finance L.L.C. (BDC) filed a complaint in the Supreme Court of the State of New York (NY Supreme Court), demanding damages of $298m, alleging that Barclays Bank PLC had breached a contract in connection with a portfolio of total return swaps governed by an ISDA Master Agreement (the Master Agreement). Following a trial, the court ruled in 2018 that Barclays Bank PLC was not a defaulting party, which was affirmed on appeal. In 2021, the trial court entered judgment in favour of Barclays Bank PLC for $3.3m and as yet to be determined legal fees and costs. BDC appealed. In 2022, the appellate court reversed the trial court’s summary judgment decision in favour of Barclays Bank PLC and remanded the case to the lower court for further proceedings. The parties filed cross-motions on the scope of trial. In January 2024, the court ruled in Barclays’ favour. BDC is appealing, and the trial is adjourned until the appeal is decided. Civil actions in respect of the US Anti-Terrorism Act Eight civil actions, on behalf of more than 4,000 plaintiffs, were filed in US federal courts in the US District Court in the Eastern District of New York (EDNY) and SDNY against Barclays Bank PLC and a number of other banks. The complaints generally allege that Barclays Bank PLC and those banks engaged in a conspiracy to facilitate US dollar-denominated transactions for the Iranian Government and various Iranian banks, which in turn funded acts of terrorism that injured or killed the plaintiffs or the plaintiffs’ family members. The plaintiffs seek to recover damages for pain, suffering and mental anguish under the provisions of the US Anti-Terrorism Act, which allow for the trebling of any proven damages. The court granted the defendants’ motions to dismiss three out of the six actions in the EDNY. The plaintiffs appealed in one action and the dismissal was affirmed, and judgment was entered, in 2023. The plaintiffs’ motion to vacate the judgment is fully briefed. The other two dismissed actions in the EDNY were consolidated into one action. The plaintiffs in that action, and in one other action in the EDNY, filed amended complaints in 2023. The two other actions in the EDNY are currently stayed. Out of the two actions in the SDNY, the court granted the defendants’ motion to dismiss the first action. That action is stayed, and the second SDNY action is stayed pending any appeal on the dismissal of the first. Shareholder derivative action In 2020, a purported Barclays shareholder filed a putative derivative action in New York state court against BCI and a number of current and former members of the Board of Directors of Barclays PLC and senior executives or employees of the Barclays Bank Group. The shareholder filed the claim on behalf of nominal defendant Barclays PLC, alleging that the individual defendants harmed the company through breaches of their duties, including under the Companies Act 2006. The plaintiff seeks damages on behalf of Barclays PLC for the losses that Barclays PLC allegedly suffered as a result of these alleged breaches. An amended complaint was filed in 2021, which BCI and certain other defendants moved to dismiss. The motion to dismiss was granted in 2022. The plaintiff appealed the decision, and the dismissal was unanimously affirmed in 2023 by the First Judicial Department in New York. The plaintiff is appealing the First Judicial Department’s decision to the New York Court of Appeals. Derivative transactions civil action In 2021, Vestia, a Dutch housing association, brought a claim against Barclays Bank PLC in the UK in the High Court in relation to a series of derivative transactions entered into with Barclays Bank PLC between 2008 and 2011, seeking damages of £329m. In May 2024, Barclays Bank PLC reached a settlement whereby Barclays paid €43.5m with no acknowledgement of liability. This matter is now closed. Skilled person review in relation to historic timeshare loans and associated matters Clydesdale Financial Services Limited (CFS), which trades as Barclays Partner Finance and houses Barclays’ point-of-sale finance business, was required by the FCA to undertake a skilled person review in 2020 following concerns about historic affordability assessments for certain loans to customers in connection with timeshare purchases. The skilled person review was concluded in 2021. CFS complied fully with the skilled person review requirements, including carrying out certain remediation measures. CFS was not required to conduct a full back book review. Instead, CFS reviewed limited historic lending to ascertain whether its practices caused customer harm and is remediating any examples of harm. This work was substantially completed during 2023, utilising provisions booked to account for any remediations. Motor finance commission arrangements In January 2024, the FCA announced that it was appointing a skilled person to undertake a review of the historical use of discretionary commission arrangements and sales in the motor finance market across several firms. This follows two final decisions by the UK Financial Ombudsman Service (FOS), including one upholding a complaint against CFS (a subsidiary of Barclays PLC) in relation to commission arrangements and disclosure in the sale of motor finance products and a number of complaints and court claims, including some against CFS. We have commenced a judicial review challenge against the FOS in the High Court in relation to this decision. Barclays will co-operate fully with the FCA’s skilled person review, the outcome of which is unknown, including any potential financial impact. The FCA currently plans to set out next steps on this matter in May 2025. Barclays ceased operating in the motor finance market in late 2019 whilst CFS was a subsidiary of the Barclays Bank Group. Over-issuance of securities in the US In 2022, executive management became aware that Barclays Bank PLC had issued securities materially in excess of the set amount under its US shelf registration statements. In 2022, a purported class action claim was filed in the US District Court in Manhattan seeking to hold Barclays PLC, Barclays Bank PLC and former and current executives responsible for declines in the price of Barclays PLC’s American depositary receipts, which the plaintiffs claim occurred as a result of alleged misstatements and omissions in its public disclosures. The defendants’ motion to dismiss the case was granted in part and denied in part in February 2024. Barclays has filed a motion for reconsideration or, alternatively, permission to appeal the decision. In addition, holders of a series of ETNs have brought a purported class action in federal court in New York against Barclays PLC, Barclays Bank PLC, and former and current executives and board members in the US alleging, among other things, that Barclays’ failure to disclose that these ETNs were unregistered securities misled investors and that, as a result, Barclays is liable for the holders’ alleged losses following the suspension of further sales and issuances of such series of ETNs. The plaintiffs were granted leave to amend and filed a new complaint in March 2024. Barclays has filed a motion to dismiss. In March 2024, a putative class action was filed in federal court in New York against Barclays PLC, Barclays Bank PLC and former and current executives. The plaintiff purports to bring claims on behalf of a class of short sellers, alleging that their short positions suffered substantial losses when Barclays suspended new issuances and sales of VXX ETNs as a result of the over-issuance of securities. HM Revenue & Customs (HMRC) assessments concerning UK Value Added Tax In 2018, HMRC issued notices that have the effect of either removing certain Barclays overseas subsidiaries that have operations in the UK from Barclays’ UK VAT group or preventing them from joining it. Supplies between members of a UK VAT group are generally free from VAT. The notices had both retrospective and prospective effect. Barclays has appealed HMRC’s decisions to the First Tier Tribunal (Tax Chamber) in relation to both the retrospective VAT assessments and the on-going VAT payments made since 2018. £181m of VAT (inclusive of interest) was assessed retrospectively by HMRC covering the periods 2014 to 2018, of which approximately £128m is expected to be attributed to Barclays Bank UK PLC and £53m to Barclays Bank PLC. This retrospectively assessed VAT was paid in 2018 and an asset, adjusted to reflect expected eventual recovery, is recognised. Since 2018 Barclays has paid, and recognised as an expense, VAT on intra-group supplies from the relevant subsidiaries to the members of the VAT group. Trial was completed in Q2 2024 in respect of the ongoing VAT payments. Judgment is awaited. General The Barclays Bank Group is engaged in various other legal, competition and regulatory matters in the UK, the US and a number of other overseas jurisdictions. It is subject to legal proceedings brought by and against the Barclays Bank Group which arise in the ordinary course of business from time to time, including (but not limited to) disputes in relation to contracts, securities, guarantees, debt collection, consumer credit, fraud, trusts, client assets, competition, data management and protection, intellectual property, money laundering, financial crime, employment, environmental and other statutory and common law issues. The Barclays Bank Group is also subject to enquiries and examinations, requests for information, audits, investigations and legal and other proceedings by regulators, governmental and other public bodies in connection with (but not limited to) consumer protection measures, measures to combat money laundering and financial crime, compliance with legislation and regulation, wholesale trading activity and other areas of banking and business activities in which the Barclays Bank Group is or has been engaged. The Barclays Bank Group is cooperating with the relevant authorities and keeping all relevant agencies briefed as appropriate in relation to these matters and others described in this note on an ongoing basis. At the present time, the Barclays Bank Group does not expect the ultimate resolution of any of these other matters to have a material adverse effect on its financial position. However, in light of the uncertainties involved in such matters and the matters specifically described in this note, there can be no assurance that the outcome of a particular matter or matters (including formerly active matters or those matters arising after the date of this note) will not be material to Barclays Bank PLC’s results, operations or cash flows for a particular period, depending on, among other things, the amount of the loss resulting from the matter(s) and the amount of profit otherwise reported for the reporting period.

Related party transactions

Related party transactions	6 Months Ended
	Jun. 30, 2024
Disclosure of transactions between related parties [abstract]
Related party transactions	Related party transactions Related party transactions in the half year ended 30 June 2024 were similar in nature to those disclosed in the Barclays Bank PLC Annual Report 2023. No related party transactions that have taken place in the half year ended 30 June 2024 have materially affected the financial position or performance of the Barclays Bank Group during this period.

Credit risk (Tables)

Credit risk (Tables)	6 Months Ended
	Jun. 30, 2024
Disclosure of credit risk exposure [abstract]
Disclosure of provision matrix	Stage 2 As at 30.06.24 Stage 1 Not past due <=30 days past due >30 days past due Total Stage 3 Total 1 Gross exposure £m £m £m £m £m £m £m Retail mortgages 4,587 15 3 51 69 601 5,257 Retail credit cards 21,766 2,747 316 262 3,325 1,844 26,935 Retail other 3,017 239 51 107 397 222 3,636 Corporate loans 103,960 8,505 49 243 8,797 1,328 114,085 Total loans and advances at amortised cost 133,330 11,506 419 663 12,588 3,995 149,913 Debt securities at amortised cost 41,261 3,556 — — 3,556 — 44,817 Total loans and advances at amortised cost including debt securities 174,591 15,062 419 663 16,144 3,995 194,730 Impairment allowance Retail mortgages 6 — — — — 283 289 Retail credit cards 399 771 140 164 1,075 1,507 2,981 Retail other 6 3 — — 3 29 38 Corporate loans 168 250 7 8 265 399 832 Total loans and advances at amortised cost 579 1,024 147 172 1,343 2,218 4,140 Debt securities at amortised cost 8 10 — — 10 — 18 Total loans and advances at amortised cost including debt securities 587 1,034 147 172 1,353 2,218 4,158 Net exposure Retail mortgages 4,581 15 3 51 69 318 4,968 Retail credit cards 21,367 1,976 176 98 2,250 337 23,954 Retail other 3,011 236 51 107 394 193 3,598 Corporate loans 103,792 8,255 42 235 8,532 929 113,253 Total loans and advances at amortised cost 132,751 10,482 272 491 11,245 1,777 145,773 Debt securities at amortised cost 41,253 3,546 — — 3,546 — 44,799 Total loans and advances at amortised cost including debt securities 174,004 14,028 272 491 14,791 1,777 190,572 Coverage ratio % % % % % % % Retail mortgages 0.1 — — — — 47.1 5.5 Retail credit cards 1.8 28.1 44.3 62.6 32.3 81.7 11.1 Retail other 0.2 1.3 — — 0.8 13.1 1.0 Corporate loans 0.2 2.9 14.3 3.3 3.0 30.0 0.7 Total loans and advances at amortised cost 0.4 8.9 35.1 25.9 10.7 55.5 2.8 Debt securities at amortised cost — 0.3 — — 0.3 — — Total loans and advances at amortised cost including debt securities 0.3 6.9 35.1 25.9 8.4 55.5 2.1 1 Other financial assets subject to impairment excluded in the table above include cash collateral and settlement balances, financial assets at fair value through other comprehensive income and other assets. These have a total gross exposure of £193.9bn and an impairment allowance of £149m. This comprises £16m impairment allowance on £192.8bn Stage 1 exposure, £3m on £1.0bn Stage 2 exposure and £130m on £136m Stage 3 exposure. Loan commitments and financial guarantee contracts have total impairment allowance of £452m. Stage 2 As at 31.12.23 Stage 1 Not past due <=30 days past due >30 days past due Total Stage 3 Total 1 Gross exposure £m £m £m £m £m £m £m Retail mortgages 7,257 342 14 33 389 716 8,362 Retail credit cards 22,315 2,818 339 293 3,450 1,522 27,287 Retail other 2,734 210 71 88 369 308 3,411 Corporate loans 100,956 8,642 166 159 8,967 1,235 111,158 Total loans and advances at amortised cost 133,262 12,012 590 573 13,175 3,781 150,218 Debt securities at amortised cost 35,321 3,749 — — 3,749 — 39,070 Total loans and advances at amortised cost including debt securities 168,583 15,761 590 573 16,924 3,781 189,288 Impairment allowance Retail mortgages 11 23 3 2 28 321 360 Retail credit cards 412 805 145 188 1,138 1,226 2,776 Retail other 8 2 — — 2 35 45 Corporate loans 179 295 7 7 309 348 836 Total loans and advances at amortised cost 610 1,125 155 197 1,477 1,930 4,017 Debt securities at amortised cost 7 17 — — 17 — 24 Total loans and advances at amortised cost including debt securities 617 1,142 155 197 1,494 1,930 4,041 Net exposure Retail mortgages 7,246 319 11 31 361 395 8,002 Retail credit cards 21,903 2,013 194 105 2,312 296 24,511 Retail other 2,726 208 71 88 367 273 3,366 Corporate loans 100,777 8,347 159 152 8,658 887 110,322 Total loans and advances at amortised cost 132,652 10,887 435 376 11,698 1,851 146,201 Debt securities at amortised cost 35,314 3,732 — — 3,732 — 39,046 Total loans and advances at amortised cost including debt securities 167,966 14,619 435 376 15,430 1,851 185,247 Coverage ratio % % % % % % % Retail mortgages 0.2 6.7 21.4 6.1 7.2 44.8 4.3 Retail credit cards 1.8 28.6 42.8 64.2 33.0 80.6 10.2 Retail other 0.3 1.0 — — 0.5 11.4 1.3 Corporate loans 0.2 3.4 4.2 4.4 3.4 28.2 0.8 Total loans and advances at amortised cost 0.5 9.4 26.3 34.4 11.2 51.0 2.7 Debt securities at amortised cost — 0.5 — — 0.5 — 0.1 Total loans and advances at amortised cost including debt securities 0.4 7.2 26.3 34.4 8.8 51.0 2.1 1 Other financial assets subject to impairment excluded in the table above include cash collateral and settlement balances, financial assets at fair value through other comprehensive income, accrued income and sundry debtors. These have a total gross exposure of £157.7bn and an impairment allowance of £145m. This comprises £14m impairment allowance on £157.3bn Stage 1 exposure, £1m on £243m Stage 2 exposure and £130m on £136m Stage 3 exposure. Loan commitments and financial guarantee contracts have total impairment allowance of £473m.
Disclosure of assets held for sale	Loans and advances to customers classified as assets held for sale Stage 1 Stage 2 Stage 3 Total Gross ECL Coverage Gross ECL Coverage Gross ECL Coverage Gross ECL Coverage As at 30.06.24 £m £m % £m £m % £m £m % £m £m % Retail credit cards 1,660 17 1.0 453 41 9.1 93 68 73.1 2,206 126 5.7 Retail other 1,361 18 1.3 259 35 13.5 79 55 69.6 1,699 108 6.4 Total 3,021 35 1.2 712 76 10.7 172 123 71.5 3,905 234 6.0 As at 31.12.23 Retail credit cards 1,621 15 0.9 445 41 9.2 92 68 73.9 2,158 124 5.7 Retail other 1,561 20 1.3 288 32 11.1 84 60 71.4 1,933 112 5.8 Total 3,182 35 1.1 733 73 10.0 176 128 72.7 4,091 236 5.8
Disclosure of credit risk	The following tables present a reconciliation of the opening to the closing balance of the exposure and impairment allowance. Transfers between stages in the tables have been reflected as if they had taken place at the beginning of the period. 'Net drawdowns, repayments, net re-measurement and movements due to exposure and risk parameter changes' includes additional drawdowns and partial repayments from existing facilities. Additionally, the below tables do not include other financial assets subject to impairment such as debt securities at amortised cost, cash collateral and settlement balances, financial assets at fair value through other comprehensive income and other assets. The movements are measured over a six-month period. Loans and advances at amortised cost Stage 1 Stage 2 Stage 3 Total Gross exposure ECL Gross exposure ECL Gross exposure ECL Gross exposure ECL £m £m £m £m £m £m £m £m Retail mortgages As at 1 January 2024 7,257 11 389 28 716 321 8,362 360 Transfers from Stage 1 to Stage 2 (136) — 136 — — — — — Transfers from Stage 2 to Stage 1 90 3 (90) (3) — — — — Transfers to Stage 3 (34) — (30) (3) 64 3 — — Transfers from Stage 3 18 1 18 1 (36) (2) — — Business activity in the period 247 — — — — — 247 — Refinements to models used for calculation — — — — — — — — Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes 127 (3) (7) 7 47 3 167 7 Final repayments (505) (1) (31) (1) (53) (2) (589) (4) Disposals 1 (2,477) (5) (316) (29) (129) (32) (2,922) (66) Write-offs — — — — (8) (8) (8) (8) As at 30 June 2024 4,587 6 69 — 601 283 5,257 289 Retail credit cards As at 1 January 2024 22,315 412 3,450 1,138 1,522 1,226 27,287 2,776 Transfers from Stage 1 to Stage 2 (1,358) (49) 1,358 49 — — — — Transfers from Stage 2 to Stage 1 1,038 285 (1,038) (285) — — — — Transfers to Stage 3 (211) (9) (600) (296) 811 305 — — Transfers from Stage 3 5 4 5 3 (10) (7) — — Business activity in the period 715 16 34 13 1 — 750 29 Refinements to models used for calculation 2 — 27 — 5 — 11 — 43 Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes 22 (263) 309 525 (8) 444 323 706 Final repayments (61) (4) (17) (7) — — (78) (11) Disposals 1 (699) (20) (176) (70) (1) (1) (876) (91) Write-offs — — — — (471) (471) (471) (471) As at 30 June 2024 21,766 399 3,325 1,075 1,844 1,507 26,935 2,981 1 The £2.9bn of gross disposals reported within Retail mortgages relate to sale of the performing Italian mortgage portfolio. The £876m of gross disposals reported within Retail credit cards relate to sale of the outstanding US Cards receivables to Blackstone. 2 Refinements to models used for calculation reported within Retail credit cards include a £43m movement in the calculated ECL for the US Cards portfolio. These reflect model enhancements made during the period. Barclays continually reviews the output of models to determine accuracy of the ECL calculation including review of model monitoring, external benchmarking and experience of model operation over an extended period of time. This helps to ensure that the models used continue to reflect the risks inherent across the businesses. Stage 1 Stage 2 Stage 3 Total Gross exposure ECL Gross exposure ECL Gross exposure ECL Gross exposure ECL £m £m £m £m £m £m £m £m Retail other As at 1 January 2024 2,734 8 369 2 308 35 3,411 45 Transfers from Stage 1 to Stage 2 (162) — 162 — — — — — Transfers from Stage 2 to Stage 1 83 — (83) — — — — — Transfers to Stage 3 (69) — (54) — 123 — — — Transfers from Stage 3 25 — 45 — (70) — — — Business activity in the period 717 1 44 — — — 761 1 Refinements to models used for calculation — — — — — — — — Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes 874 (1) (6) 2 1 4 869 5 Final repayments (1,185) (2) (80) (1) (132) (2) (1,397) (5) Disposals — — — — — — — — Write-offs — — — — (8) (8) (8) (8) As at 30 June 2024 3,017 6 397 3 222 29 3,636 38 Corporate loans As at 1 January 2024 100,956 179 8,967 309 1,235 348 111,158 836 Transfers from Stage 1 to Stage 2 (2,083) (11) 2,083 11 — — — — Transfers from Stage 2 to Stage 1 1,742 49 (1,742) (49) — — — — Transfers to Stage 3 (59) (1) (317) (16) 376 17 — — Transfers from Stage 3 94 1 7 1 (101) (2) — — Business activity in the period 15,771 24 586 15 50 1 16,407 40 Refinements to models used for calculation 1 — 3 — 18 — — — 21 Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes 5,039 (55) 229 24 (27) 135 5,241 104 Final repayments (17,470) (20) (1,011) (47) (107) (2) (18,588) (69) Disposals 2 (30) (1) (5) (1) — — (35) (2) Write-offs — — — — (98) (98) (98) (98) As at 30 June 2024 103,960 168 8,797 265 1,328 399 114,085 832 1 Refinements to models used for calculation reported within Corporate loans include a £21m movement in the calculated ECL for the IB portfolio. These reflect model enhancements made during the period. Barclays continually reviews the output of models to determine accuracy of the ECL calculation including review of model monitoring, external benchmarking and experience of model operation over an extended period of time. This helps to ensure that the models used continue to reflect the risks inherent across the businesses. 2 The £35m of gross disposals reported within Corporate loans relate to debt sales undertaken during the period. Reconciliation of ECL movement to impairment charge/(release) for the period Stage 1 Stage 2 Stage 3 Total £m £m £m £m Retail mortgages — 1 2 3 Retail credit cards 7 7 753 767 Retail other (2) 1 2 1 Corporate loans (10) (43) 149 96 ECL movement excluding disposals and write-offs 1 (5) (34) 906 867 ECL movement on loan commitments and other financial guarantees 15 (23) (13) (21) ECL movement on other financial assets 2 2 — 4 ECL movement on debt securities at amortised cost 1 (7) — (6) Recoveries and reimbursements 2 (31) 25 (26) (32) ECL charge on assets held for sale 44 Total exchange and other adjustments (25) Total income statement charge for the period 831 1 In H124, gross write-offs amounted to £585m (H123: £404m). Post write-off recoveries amounted to £14m (H123: £7m). Net write-offs represent gross write-offs less post write-off recoveries and amounted to £571m (H123: £397m). 2 Recoveries and reimbursements include £18m (H123 loss: £7m) for reimbursements expected to be received under the arrangement where Barclays Bank Group has entered into financial guarantee contracts which provide credit protection over certain assets with third parties and cash recoveries of previously written off amounts £14m (H123: £7m). Loan commitments and financial guarantees Stage 1 Stage 2 Stage 3 Total Gross exposure ECL Gross exposure ECL Gross exposure ECL Gross exposure ECL £m £m £m £m £m £m £m £m Retail mortgages As at 1 January 2024 41 — — — 1 — 42 — Net transfers between stages — — — — — — — — Business activity in the year — — — — — — — — Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes 5 — — — — — 5 — Limit management and final repayments (7) — — — — — (7) — As at 30 June 2024 39 — — — 1 — 40 — Retail credit cards 1 As at 1 January 2024 109,634 48 1,767 36 10 1 111,411 85 Net transfers between stages (920) 21 918 (21) 2 — — — Business activity in the year 7,550 7 48 3 1 — 7,599 10 Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes 2,935 (16) (774) 20 (3) — 2,158 4 Limit management and final repayments (5,567) (5) (239) (10) — — (5,806) (15) As at 30 June 2024 113,632 55 1,720 28 10 1 115,362 84 Retail other 1 As at 1 January 2024 3,446 5 116 2 29 — 3,591 7 Net transfers between stages (4) — (2) — 6 — — — Business activity in the year 442 1 84 — — — 526 1 Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes 316 (1) (35) (2) 1 — 282 (3) Limit management and final repayments (540) — (7) — (16) — (563) — As at 30 June 2024 3,660 5 156 — 20 — 3,836 5 Corporate loans As at 1 January 2024 212,414 114 20,035 225 802 42 233,251 381 Net transfers between stages 2,335 35 (2,482) (37) 147 2 — — Business activity in the year 48,333 19 2,364 20 72 — 50,769 39 Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes 5,058 (34) 552 40 (97) (10) 5,513 (4) Limit management and final repayments (46,540) (12) (4,533) (36) (104) (5) (51,177) (53) As at 30 June 2024 221,600 122 15,936 212 820 29 238,356 363 1 Loan commitments reported within Retail credit cards and Retail other also include financial assets classified as held for sale.
Drivers of loan impairment charge	Management adjustments to models for impairment allowance presented by product 1 Impairment allowance pre management adjustments 2 Economic uncertainty adjustments Other adjustments 3 Management adjustments Total impairment allowance 4 Proportion of Management adjustments to total impairment allowance (a) (b) (a+b) As at 30.06.2024 £m £m £m £m £m % Retail mortgages 292 — (3) (3) 289 (1.0) Retail credit cards 3,065 — — — 3,065 — Retail other 42 — 1 1 43 2.3 Corporate loans 1,163 — 32 32 1,195 2.7 Total 4,562 — 30 30 4,592 0.7 Debt securities at amortised cost 27 — (9) (9) 18 (50.0) Total including debt securities at amortised cost 4,589 — 21 21 4,610 0.5 As at 31.12.2023 £m £m £m £m £m % Retail mortgages 363 — (3) (3) 360 (0.8) Retail credit cards 2,852 — 9 9 2,861 0.3 Retail other 62 — (10) (10) 52 (19.2) Corporate loans 1,231 16 (30) (14) 1,217 (1.2) Total 4,508 16 (34) (18) 4,490 (0.4) Debt securities at amortised cost 24 — — — 24 — Total including debt securities at amortised cost 4,532 16 (34) (18) 4,514 (0.4) Economic uncertainty adjustments presented by stage Stage 1 Stage 2 Stage 3 Total As at 31.12.2023 £m £m £m £m Retail mortgages — — — — Retail credit cards — — — — Retail other — — — — Corporate loans 4 12 — 16 Total 4 12 — 16 1 Positive values reflect an increase in impairment allowance and negative values reflect a reduction in the impairment allowance. 2 Includes £4.1bn (December 2023: £4.0bn) of modelled ECL, £0.3bn (December 2023: £0.3bn) of individually assessed impairments and £0.2bn (December 2023: £0.2bn) of ECL from non-modelled exposures and debt securities. 3 Management adjustments related to other financial assets subject to impairment not included in the table above include cash collateral and settlement balances £ (2) m and financial assets at fair value through other comprehensive income £ (2) m within the IB portfolio. 4 Total impairment allowance consists of ECL stock on drawn and undrawn exposure.
Macroeconomic variables used in the calculation of ECL and the respective scenario probability weighting	Macroeconomic variables used in the calculation of ECL As at 30 June 2024 2024 2025 2026 2027 2028 Baseline % % % % % UK GDP 1 0.7 1.2 1.6 1.7 1.6 UK unemployment 2 4.3 4.4 4.4 4.4 4.4 UK HPI 3 (1.2) 1.6 3.0 4.4 3.2 UK bank rate 6 5.0 4.3 3.8 3.6 3.5 US GDP 1 2.3 1.7 2.0 2.0 2.0 US unemployment 4 4.0 4.1 4.1 4.1 4.1 US HPI 5 3.3 3.0 3.3 3.3 3.3 US federal funds rate 6 5.3 4.4 4.0 3.8 3.8 Downside 2 UK GDP 1 0.2 (3.2) 0.5 2.1 1.3 UK unemployment 2 4.4 6.4 6.9 5.3 4.7 UK HPI 3 (3.6) (23.3) 2.8 15.6 7.7 UK bank rate 6 5.9 4.0 1.0 1.0 1.0 US GDP 1 1.8 (2.9) 1.2 2.8 1.6 US unemployment 4 4.2 6.3 6.4 5.3 4.9 US HPI 5 0.9 (10.7) 2.0 8.0 5.3 US federal funds rate 6 5.9 4.1 1.5 1.5 1.5 Downside 1 UK GDP 1 0.4 (1.0) 1.0 1.9 1.5 UK unemployment 2 4.3 5.4 5.6 4.9 4.6 UK HPI 3 (2.4) (11.5) 2.9 9.9 5.5 UK bank rate 6 5.5 4.1 2.4 2.3 2.3 US GDP 1 2.0 (0.6) 1.6 2.4 1.8 US unemployment 4 4.1 5.2 5.3 4.7 4.5 US HPI 5 2.1 (4.0) 2.7 5.6 4.3 US federal funds rate 6 5.6 4.3 2.8 2.6 2.6 Upside 2 UK GDP 1 1.1 3.9 3.2 2.6 2.3 UK unemployment 2 4.1 3.4 3.4 3.3 3.2 UK HPI 3 4.9 14.2 6.8 2.7 3.8 UK bank rate 6 4.9 3.4 2.6 2.6 2.5 US GDP 1 2.6 3.2 2.9 2.8 2.8 US unemployment 4 3.7 3.5 3.4 3.4 3.4 US HPI 5 5.3 3.9 5.0 4.6 4.6 US federal funds rate 6 5.2 3.7 3.1 2.8 2.8 Upside 1 UK GDP 1 0.9 2.5 2.4 2.2 2.0 UK unemployment 2 4.2 3.9 3.9 3.9 3.8 UK HPI 3 1.8 7.8 4.9 3.6 3.5 UK bank rate 6 5.0 3.8 3.2 3.1 3.0 US GDP 1 2.4 2.5 2.4 2.4 2.4 US unemployment 4 3.8 3.8 3.8 3.8 3.8 US HPI 5 4.3 3.5 4.2 3.9 3.9 US federal funds rate 6 5.3 4.1 3.5 3.3 3.3 1. Average Real GDP seasonally adjusted change in year. 2. Average UK unemployment rate 16-year+. 3. Change in year end UK HPI = Halifax All Houses, All Buyers index, relative to prior year end. 4. Average US civilian unemployment rate 16-year+. 5. Change in year end US HPI = FHFA House Price Index, relative to prior year end. 6. Average rate. Macroeconomic variables used in the calculation of ECL As at 31 December 2023 2023 2024 2025 2026 2027 Baseline % % % % % UK GDP 1 0.5 0.3 1.2 1.6 1.6 UK unemployment 2 4.2 4.7 4.7 4.8 5.0 UK HPI 3 (3.3) (5.1) 0.7 3.1 5.3 UK bank rate 6 4.7 4.9 4.1 3.8 3.5 US GDP 1 2.4 1.3 1.7 1.9 1.9 US unemployment 4 3.7 4.3 4.3 4.3 4.3 US HPI 5 5.4 3.4 3.0 3.3 3.3 US federal funds rate 6 5.1 5.0 3.9 3.8 3.8 Downside 2 UK GDP 1 0.5 (1.5) (2.6) 2.4 1.6 UK unemployment 2 4.2 5.2 7.9 6.3 5.5 UK HPI 3 (3.3) (19.3) (16.8) 14.5 12.4 UK bank rate 6 4.7 6.6 1.3 1.0 1.0 US GDP 1 2.4 (0.6) (2.0) 3.1 2.0 US unemployment 4 3.7 5.2 7.2 5.9 5.2 US HPI 5 5.4 (6.5) (5.7) 7.2 6.4 US federal funds rate 6 5.1 6.3 1.8 1.5 1.5 Downside 1 UK GDP 1 0.5 (0.6) (0.7) 2.0 1.6 UK unemployment 2 4.2 4.9 6.3 5.6 5.2 UK HPI 3 (3.3) (12.4) (8.3) 8.7 8.8 UK bank rate 6 4.7 5.8 2.7 2.5 2.3 US GDP 1 2.4 0.3 (0.2) 2.5 1.9 US unemployment 4 3.7 4.7 5.8 5.1 4.8 US HPI 5 5.4 (1.7) (1.4) 5.2 4.8 US federal funds rate 6 5.1 5.7 2.9 2.8 2.8 Upside 2 UK GDP 1 0.5 2.4 3.7 2.9 2.4 UK unemployment 2 4.2 3.9 3.5 3.6 3.6 UK HPI 3 (3.3) 7.8 7.6 4.5 5.6 UK bank rate 6 4.7 4.3 2.7 2.5 2.5 US GDP 1 2.4 2.8 3.1 2.8 2.8 US unemployment 4 3.7 3.5 3.6 3.6 3.6 US HPI 5 5.4 6.1 4.3 4.5 4.6 US federal funds rate 6 5.1 4.3 2.9 2.8 2.8 Upside 1 UK GDP 1 0.5 1.4 2.5 2.3 2.0 UK unemployment 2 4.2 4.3 4.1 4.2 4.3 UK HPI 3 (3.3) 1.2 4.1 3.8 5.4 UK bank rate 6 4.7 4.6 3.4 3.3 3.0 US GDP 1 2.4 2.0 2.4 2.4 2.4 US unemployment 4 3.7 3.9 3.9 4.0 4.0 US HPI 5 5.4 4.7 3.7 3.9 3.9 US federal funds rate 6 5.1 4.7 3.5 3.3 3.3 1. Average Real GDP seasonally adjusted change in year. 2. Average UK unemployment rate 16-year+. 3. Change in year end UK HPI = Halifax All Houses, All Buyers index, relative to prior year end. 4. Average US civilian unemployment rate 16-year+. 5. Change in year end US HPI = FHFA House Price Index, relative to prior year end. 6. Average rate. Scenario probability weighting Upside 2 Upside 1 Baseline Downside 1 Downside 2 % % % % % As at 30 June 2024 Scenario probability weighting 16.5 26.1 32.6 16.2 8.6 As at 31 December 2023 Scenario probability weighting 13.8 24.7 32.4 18.3 10.8 Specific bases show the most extreme position of each variable in the context of the downside/upside scenarios, for example, the highest unemployment for downside scenarios, average unemployment for baseline scenarios and lowest unemployment for upside scenarios. GDP and HPI downside and upside scenario data represents the lowest and highest cumulative position relative to the start point in the 20 quarter period. Macroeconomic variables (specific bases) 1 Upside 2 Upside 1 Baseline Downside 1 Downside 2 As at 30 June 2024 % % % % % UK GDP 2 15.1 11.5 1.4 (0.7) (3.7) UK unemployment 3 3.1 3.8 4.4 6.2 8.0 UK HPI 4 36.5 23.4 2.2 (14.6) (28.2) UK bank rate 3 2.5 3.0 4.0 6.5 8.5 US GDP 2 14.8 12.3 2.0 (0.2) (3.3) US unemployment 3 3.4 3.8 4.1 5.7 7.3 US HPI 4 25.7 21.5 3.2 (2.0) (10.6) US federal funds rate 3 2.8 3.3 4.3 6.6 8.5 As at 31 December 2023 UK GDP 2 13.4 9.6 1.1 (1.3) (4.1) UK unemployment 3 3.5 3.9 4.7 6.5 8.3 UK HPI 4 23.8 11.5 0.1 (22.5) (35.0) UK bank rate 3 2.5 3.0 4.2 6.8 8.5 US GDP 2 15.1 12.3 1.8 0.6 (1.7) US unemployment 3 3.4 3.5 4.2 5.9 7.5 US HPI 4 27.4 23.5 3.7 0.4 (7.6) US federal funds rate 3 2.8 3.3 4.3 6.8 8.5 1 UK GDP = Real GDP growth seasonally adjusted; UK unemployment = UK unemployment rate 16-year+; UK HI = Halifax All Houses, All Buyers Index; US GDP = Real GDP growth seasonally adjusted; US unemployment = US civilian unemployment rate 16-year+; US HPI = FHFA House Price Index. 20 quarter period starts from Q124 (2023: Q123). 2 Maximum growth relative to Q423 (2023: Q422), based on 20 quarter period in Upside scenarios; 5-year yearly average Compound Annual Growth Rate (CAGR) in Baseline; minimum growth relative to Q423 (2023: Q422), based on 20 quarter period in Downside scenarios. 3 Lowest quarter in 20 quarter period in Upside scenarios; 5-year average in Baseline; highest quarter 20 quarter period in Downside scenarios. 4 Maximum growth relative to Q423 (2023: Q422), based on 20 quarter period in Upside scenarios; 5-year quarter end CAGR in Baseline; minimum growth relative to Q423 (2023: Q422), based on 20 quarter period in Downside scenarios. Average basis represents the average quarterly value of variables in the 20 quarter period with GDP and HPI based on yearly average and quarterly CAGRs respectively. Macroeconomic variables (5-year averages) 1 Upside 2 Upside 1 Baseline Downside 1 Downside 2 As at 30 June 2024 % % % % % UK GDP 2 2.6 2.0 1.4 0.8 0.2 UK unemployment 3 3.5 3.9 4.4 5.0 5.5 UK HPI 4 6.4 4.3 2.2 0.6 (1.1) UK bank rate 3 3.2 3.6 4.0 3.3 2.6 US GDP 2 2.9 2.4 2.0 1.5 0.9 US unemployment 3 3.5 3.8 4.1 4.7 5.4 US HPI 4 4.7 4.0 3.2 2.1 0.9 US federal funds rate 3 3.5 3.9 4.3 3.6 2.9 As at 31 December 2023 UK GDP 2 2.4 1.7 1.1 0.6 0.1 UK unemployment 3 3.7 4.2 4.7 5.2 5.8 UK HPI 4 4.4 2.2 0.1 (1.7) (3.5) UK bank rate 3 3.3 3.8 4.2 3.6 2.9 US GDP 2 2.8 2.3 1.8 1.4 0.9 US unemployment 3 3.6 3.9 4.2 4.8 5.4 US HPI 4 5.0 4.3 3.7 2.4 1.2 US federal funds rate 3 3.6 4.0 4.3 3.9 3.2 1 UK GDP = Real GDP growth seasonally adjusted; UK unemployment = UK unemployment rate 16-year+; UK HPI = Halifax All Houses, All Buyers Index; US GDP = Real GDP growth seasonally adjusted; US unemployment = US civilian unemployment rate 16-year+; US HPI = FHFA House Price Index. 2 5-year yearly average CAGR, starting 2023 (2023: 2022). 3 5-year average. Period based on 20 quarters from Q124 (2023: Q123). 4 5-year quarter end CAGR, starting Q423 (2023: Q422).
Disclosure of management Value at Risk	Management VaR (95%) by asset class Half year ended 30.06.24 Half year ended 31.12.23 Half year ended 30.06.23 Average High Low Average High Low Average High Low £m £m £m £m £m £m £m £m £m Credit risk 22 27 19 32 40 22 48 57 38 Interest rate risk 16 25 9 15 24 10 16 25 9 Equity risk 6 9 4 5 9 3 6 10 3 Basis risk 6 8 4 10 13 8 15 24 11 Spread risk 5 7 4 7 10 6 10 14 7 Foreign exchange risk 4 9 2 4 9 1 3 6 1 Commodity risk — 1 — — 1 — — 1 — Inflation risk 4 5 2 4 6 2 9 11 6 Diversification effect 1 (34) n/a n/a (38) n/a n/a (62) n/a n/a Total management VaR 29 36 20 39 55 24 45 60 35 1 Diversification effects recognise that forecast losses from different assets or businesses are unlikely to occur concurrently, hence the expected aggregate loss is lower than the sum of the expected losses from each area. Historical correlations between losses are taken into account in making these assessments. The high and low VaR figures reported for each category did not necessarily occur on the same day as the high and low total management VaR. Consequently, a diversification effect balance for the high and low VaR figures would not be meaningful and is therefore omitted from the above table.

Segmental reporting (Tables)

Segmental reporting (Tables)	6 Months Ended
	Jun. 30, 2024
Disclosure of operating segments [abstract]
Analysis of results by business	Analysis of results by business Barclays UK Corporate Bank Barclays Private Bank and Wealth Management Barclays Investment Bank Barclays US Consumer Bank Head Office Barclays Bank Group Half year ended 30.06.24 £m £m £m £m £m £m Net interest income 604 376 654 1,347 134 3,115 Non-interest income / (expense) 308 272 5,905 344 (250) 6,579 Total income 912 648 6,559 1,691 (116) 9,694 Operating costs (492) (454) (3,963) (807) (349) (6,065) UK regulatory levies 1 (30) (3) (33) — — (66) Litigation and conduct — 1 (11) (4) (42) (56) Total operating expenses (522) (456) (4,007) (811) (391) (6,187) Other net income 2 — — — — 1 1 Profit/(loss) before impairment 390 192 2,552 880 (506) 3,508 Credit impairment (charge)/release (23) 3 (34) (719) (58) (831) Profit/(loss) before tax 367 195 2,518 161 (564) 2,677 As at 30.06.24 £bn £bn £bn £bn £bn £bn Total assets 64.0 35.8 1,121.9 32.0 30.3 1,284.0 Total liabilities 87.3 65.3 1,043.1 21.5 7.7 1,224.9 Barclays UK Corporate Bank Barclays Private Bank and Wealth Management Barclays Investment Bank Barclays US Consumer Bank Head Office Barclays Bank Group Half year ended 30.06.23 £m £m £m £m £m £m Net interest income 644 377 863 1,262 (26) 3,120 Non-interest income 330 192 5,636 337 189 6,684 Total income 974 569 6,499 1,599 163 9,804 Operating costs (457) (340) (3,956) (837) (362) (5,952) UK regulatory levies 1 — — — — — — Litigation and conduct — — 2 (4) (32) (34) Total operating expenses (457) (340) (3,954) (841) (394) (5,986) Other net (expense)/income 2 2 — — 1 (1) 2 Profit/(loss) before impairment 519 229 2,545 759 (232) 3,820 Credit impairment (charge)/release 60 (10) (102) (585) (51) (688) Profit/(loss) before tax 579 219 2,443 174 (283) 3,132 As at 31.12.23 £bn £bn £bn £bn £bn £bn Total assets 61.6 32.1 1,027.6 33.4 30.5 1,185.2 Total liabilities 86.8 61.0 948.9 21.2 6.8 1,124.7 1 Comprises the impact of the BoE levy scheme and the UK bank levy. 2 Other net income represents the share of post-tax results of associates and joint ventures.
Split of income by geographic region	Split of income by geographic region 1 Half year ended 30.06.24 Half year ended 30.06.23 £m £m United Kingdom 3,185 3,555 Europe 1,190 1,255 Americas 4,617 4,234 Africa and Middle East 39 42 Asia 663 718 Total 9,694 9,804 1

Net fee and commission income (

Net fee and commission income (Tables)	6 Months Ended
	Jun. 30, 2024
Fee and commission income (expense) [abstract]
Total fees in scope of IFRS 15 revenues from contracts with customers	Fee and commission income is disaggregated below and includes a total for fees in scope of IFRS 15, Revenue from Contracts with Customers: Barclays UK Corporate Bank Barclays Private Bank and Wealth Management Barclays Investment Bank Barclays US Consumer Bank Head Office Barclays Bank Group Half year ended 30.06.24 £m £m £m £m £m £m Fee type Transactional 228 16 171 1,320 160 1,895 Advisory — 156 325 — — 481 Brokerage and execution — 62 777 — — 839 Underwriting and syndication 46 — 1,391 — — 1,437 Other 6 2 35 — 11 54 Total revenue from contracts with customers 280 236 2,699 1,320 171 4,706 Other non-contract fee income 11 — 58 — — 69 Fee and commission income 291 236 2,757 1,320 171 4,775 Fee and commission expense (46) (19) (520) (893) (49) (1,527) Net fee and commission income 245 217 2,237 427 122 3,248 Barclays UK Corporate Bank Barclays Private Bank and Wealth Management Barclays Investment Bank Barclays US Consumer Bank Head Office Barclays Bank Group Half year ended 30.06.23 £m £m £m £m £m £m Fee type Transactional 212 13 160 1,290 150 1,825 Advisory — 94 363 — — 457 Brokerage and execution — 44 998 — — 1,042 Underwriting and syndication 39 — 997 — — 1,036 Other 8 2 43 5 35 93 Total revenue from contracts with customers 259 153 2,561 1,295 185 4,453 Other non-contract fee income 15 3 56 — — 74 Fee and commission income 274 156 2,617 1,295 185 4,527 Fee and commission expense (50) (15) (742) (870) (44) (1,721) Net fee and commission income 224 141 1,875 425 141 2,806

Dividends on ordinary shares _2

Dividends on ordinary shares and preference shares (Tables)	6 Months Ended
	Jun. 30, 2024
Dividends [Abstract]
Dividends on ordinary shares and preference shares	Half year ended 30.06.24 Half year ended 30.06.23 Dividends paid during the period £m £m Ordinary shares 852 700 Preference shares 21 19 Total 873 719

Fair value of financial instr_2

Fair value of financial instruments (Tables)	6 Months Ended
	Jun. 30, 2024
Disclosure of fair value measurement of assets [abstract]
Assets and liabilities held at fair value disaggregated by valuation technique (fair value hierarchy) and balance sheet classification and level 3 assets and liabilities held at fair value disaggregated by product type	The following table shows the Barclays Bank Group’s assets and liabilities that are held at fair value disaggregated by valuation technique (fair value hierarchy) and balance sheet classification: Valuation technique using Quoted market prices Observable inputs Significant unobservable inputs (Level 1) (Level 2) (Level 3) Total As at 30.06.24 £m £m £m £m Trading portfolio assets 98,942 89,613 8,726 197,281 Financial assets at fair value through the income statement 7,416 198,865 7,024 213,305 Derivative financial instruments 86 249,337 2,821 252,244 Financial assets at fair value through other comprehensive income 21,930 29,692 2,400 54,022 Investment property — — 1 1 Total assets 128,374 567,507 20,972 716,853 Trading portfolio liabilities (32,666) (25,621) (385) (58,672) Financial liabilities designated at fair value (182) (318,426) (2,474) (321,082) Derivative financial instruments (66) (237,664) (4,335) (242,065) Total liabilities (32,914) (581,711) (7,194) (621,819) As at 31.12.23 Trading portfolio assets 94,615 73,442 6,509 174,566 Financial assets at fair value through the income statement 5,747 193,121 5,368 204,236 Derivative financial instruments 107 252,464 3,540 256,111 Financial assets at fair value through other comprehensive income 21,079 29,568 776 51,423 Investment property — — 2 2 Total assets 121,548 548,595 16,195 686,338 Trading portfolio liabilities (28,380) (29,013) (368) (57,761) Financial liabilities designated at fair value (117) (297,244) (1,212) (298,573) Derivative financial instruments (81) (245,146) (4,653) (249,880) Total liabilities (28,578) (571,403) (6,233) (606,214) The following table shows the Barclays Bank Group’s Level 3 assets and liabilities that are held at fair value disaggregated by product type: As at 30.06.24 As at 31.12.23 Assets Liabilities Assets Liabilities £m £m £m £m Interest rate derivatives 1,622 (1,538) 2,211 (1,701) Foreign exchange derivatives 175 (118) 111 (91) Credit derivatives 216 (798) 241 (820) Equity derivatives 808 (1,881) 977 (2,041) Corporate debt 2,211 (353) 1,568 (352) Reverse repurchase and repurchase agreements 620 (934) 209 (517) Loans 11,404 — 8,986 — Private equity investments 183 — 145 — Asset backed securities 2,145 (2) 605 — Issued debt — (1,539) — (637) Other 1 1,588 (31) 1,142 (74) Total 20,972 (7,194) 16,195 (6,233) 1 Other includes funds and fund-linked products, Government and Government sponsored debt, equities cash products and investment property.
Analysis of movements in Level 3 assets and liabilities	The following table summarises the movements in the balances of Level 3 assets and liabilities during the period. The table shows gains and losses and includes amounts for all financial assets and liabilities that are held at fair value transferred to and from Level 3 during the period. Transfers have been reflected as if they had taken place at the beginning of the period. Asset and liability movements between Level 2 and Level 3 are primarily due to i) an increase or decrease in observable market activity related to an input or ii) a change in the significance of the unobservable input, with assets and liabilities classified as Level 3 if an unobservable input is deemed significant. Level 3 movement analysis Purchases Sales Issues Settle- ments Total gains and (losses) in the period recognised in the income statement Total gains or (losses) recognised in OCI Transfers As at 30.06.24 As at 01.01.24 Trading income Other income In Out £m £m £m £m £m £m £m £m £m £m £m Corporate debt 679 833 (225) — (49) (56) — — 144 (21) 1,305 Loans 4,469 1,478 (247) — (661) 42 — — 139 (10) 5,210 Asset backed securities 318 39 (196) — — 23 — — 611 (65) 730 Other 1,043 763 (339) — (4) (16) — — 152 (118) 1,481 Trading portfolio assets 6,509 3,113 (1,007) — (714) (7) — — 1,046 (214) 8,726 Corporate debt 889 — (3) — — 13 7 — — — 906 Loans 3,984 1,760 (1,000) — (266) (21) 18 — 138 (61) 4,552 Private equity investments 145 37 (2) — (4) 2 5 — — — 183 Reverse repurchase and repurchase agreements 209 297 — — — — — — 141 (27) 620 Asset backed securities 85 590 (1) — (12) 1 — — 9 (14) 658 Other 56 48 — — — (1) 4 — 2 (4) 105 Financial assets at fair value through the income statement 5,368 2,732 (1,006) — (282) (6) 34 — 290 (106) 7,024 Loans 533 1,097 — — — 1 11 — — — 1,642 Asset backed securities 200 757 — — — — — — — (200) 757 Other 43 — (42) — — — — — — — 1 Financial assets at fair value through other comprehensive income 776 1,854 (42) — — 1 11 — — (200) 2,400 Investment property 2 — (1) — — — — — — — 1 Trading portfolio liabilities (368) (28) 17 — — 18 — — (30) 6 (385) Financial liabilities designated at fair value (1,212) 1 9 (628) 16 (27) — — (881) 248 (2,474) Interest rate derivatives 510 10 — — (136) (158) — — 31 (173) 84 Foreign exchange derivatives 20 (1) — — 18 6 — — 21 (7) 57 Credit derivatives (579) 5 33 — — (22) — — (22) 3 (582) Equity derivatives (1,064) (195) — (19) (53) (19) — — (9) 286 (1,073) Net derivative financial instruments 1 (1,113) (181) 33 (19) (171) (193) — — 21 109 (1,514) Total 9,962 7,491 (1,997) (647) (1,151) (214) 45 — 446 (157) 13,778 1 Derivative financial instruments are presented on a net basis. On a gross basis, derivative financial assets were £2,821m and derivative financial liabilities were £(4,335)m. Level 3 movement analysis Purchases Sales Issues Settle- ments Total gains and (losses) in the period recognised in the income statement Total gains or (losses) recognised in OCI Transfers As at 30.06.23 As at 01.01.23 Trading income Other income In Out £m £m £m £m £m £m £m £m £m £m £m Corporate debt 595 338 (118) — (53) 5 — — 36 (29) 774 Loans 4,837 919 (1,152) — (311) 4 — — 556 (334) 4,519 Asset backed securities 175 324 (278) — — (11) — — 288 (60) 438 Other 873 704 (328) — (38) (32) — — 142 (253) 1,068 Trading portfolio assets 6,480 2,285 (1,876) — (402) (34) — — 1,022 (676) 6,799 Corporate debt 1,079 — (120) — — (20) (3) — — — 936 Loans 4,553 1,839 (823) — (613) (44) (42) — 28 (106) 4,792 Private equity investments 140 — — — (5) (5) 8 — — — 138 Reverse repurchase and repurchase agreements 38 — — — — (11) — — 46 (29) 44 Asset backed securities 192 8 (2) — — (13) — — 21 (16) 190 Other 109 — (10) — (20) 1 (10) — 1 — 71 Financial assets at fair value through the income statement 6,111 1,847 (955) — (638) (92) (47) — 96 (151) 6,171 Loans — 47 — — — — — — — — 47 Asset backed securities 3 — — — (1) — — — — — 2 Other 1 — — — — — — — — — 1 Financial assets at fair value through other comprehensive income 4 47 — — (1) — — — — — 50 Investment property 5 — — — — — (3) — — — 2 Trading portfolio liabilities (56) (16) 4 — — 15 — — (8) 9 (52) Financial liabilities designated at fair value (1,042) — — (226) — 4 (1) — (290) 463 (1,092) Interest rate derivatives (497) — — — 19 (35) — — 544 446 477 Foreign exchange derivatives 39 — — — — (31) — — 13 (15) 6 Credit derivatives (313) (191) 5 — 66 13 — — 52 16 (352) Equity derivatives (419) (90) — — (132) (135) — — (104) 12 (868) Net derivative financial instruments 1 (1,190) (281) 5 — (47) (188) — — 505 459 (737) Total 10,312 3,882 (2,822) (226) (1,088) (295) (51) — 1,325 104 11,141 1 Derivative financial instruments are presented on a net basis. On a gross basis, derivative financial assets were £4,532m and derivative financial liabilities were £(5,269)m.
Unrealised gains and losses recognised during the period on Level 3 assets and liabilities held at period end	Unrealised gains and losses on Level 3 financial assets and liabilities The following table discloses the unrealised gains and losses recognised in the period arising on Level 3 financial assets and liabilities held at the period end. Half year ended 30.06.24 Half year ended 30.06.23 Income statement Other compre-hensive income Total Income statement Other compre-hensive income Total Trading income Other income Trading income Other income £m £m £m £m £m £m £m £m Trading portfolio assets (2) — — (2) (35) — — (35) Financial assets at fair value through the income statement 15 30 — 45 (87) (50) — (137) Financial assets at fair value through other comprehensive income (2) 11 — 9 — — — — Investment properties — — — — — (3) — (3) Trading portfolio liabilities 17 — — 17 15 — — 15 Financial liabilities designated at fair value (29) — — (29) 2 (1) — 1 Net derivative financial instruments (191) — — (191) (186) — — (186) Total (192) 41 — (151) (291) (54) — (345)
Sensitivity analysis of valuations using unobservable inputs	Sensitivity analysis of valuations using unobservable inputs (Relates to Level 3 Portfolios) As at 30.06.24 As at 31.12.23 Favourable changes Unfavourable changes Favourable changes Unfavourable changes Income statement Equity Income Statement Equity Income statement Equity Income Statement Equity £m £m £m £m £m £m £m £m Interest rate derivatives 99 — (170) — 78 — (158) — Foreign exchange derivatives 6 — (10) — 4 — (9) — Credit derivatives 11 — (15) — 27 — (32) — Equity derivatives 202 — (289) — 142 — (226) — Corporate debt 55 — (31) — 34 — (22) — Loans 633 32 (830) (32) 545 2 (763) (2) Private equity investments 30 — (30) — 9 — (9) — Asset Backed Securities 39 4 (29) (4) 36 1 (27) (1) Other 1 93 — (106) — 90 — (91) — Total 1,168 36 (1,510) (36) 965 3 (1,337) (3) 1 Other includes Equity cash products, Fund and fund-linked products, Issued debt, Commercial paper, Government and Government sponsored debt and Investment property.
Fair value adjustments	Key balance sheet valuation adjustments are quantified below: As at 30.06.24 As at 31.12.23 £m £m Exit price adjustments derived from market bid-offer spreads (498) (558) Uncollateralised derivative funding 5 (4) Derivative credit valuation adjustments (190) (209) Derivative debit valuation adjustments 111 144
Comparison of carrying amounts and fair values for assets and liabilities not held at fair value	The following table summarises the fair value of financial assets and liabilities measured at amortised cost on the Barclays Bank Group’s balance sheet: As at 30.06.24 As at 31.12.23 Carrying amount Fair value Carrying amount Fair value Financial assets £m £m £m £m Debt securities at amortised cost 44,799 43,887 39,046 37,807 Loans and advances at amortised cost 145,773 147,555 146,201 147,323 Reverse repurchase agreements and other similar secured lending 2,980 2,980 1,103 1,103 Financial liabilities Deposits at amortised cost (324,012) (324,092) (301,798) (301,851) Repurchase agreements and other similar secured borrowing (39,533) (39,533) (28,554) (28,554) Debt securities in issue (43,078) (42,994) (45,653) (45,557) Subordinated liabilities (37,849) (39,602) (35,903) (37,295)

Subordinated liabilities (Table

Subordinated liabilities (Tables)	6 Months Ended
	Jun. 30, 2024
Subordinated liabilities [abstract]
Subordinated liabilities	Half year ended 30.06.24 Year ended 31.12.23 £m £m Opening balance as at 1 January 35,903 38,253 Issuances 7,354 5,986 Redemptions (4,804) (7,431) Other (604) (905) Closing balance 37,849 35,903 Designated at fair value (Note 5) 543 579 Total subordinated liabilities 38,392 36,482

Provisions (Tables)

Provisions (Tables)	6 Months Ended
	Jun. 30, 2024
Provisions [abstract]
Provisions	As at 30.06.24 As at 31.12.23 £m £m Customer redress 18 21 Legal, competition and regulatory matters 54 59 Redundancy and restructuring 91 126 Undrawn contractually committed facilities and guarantees 452 473 Sundry provisions 142 138 Total 757 817

Other reserves (Tables)

Other reserves (Tables)	6 Months Ended
	Jun. 30, 2024
Disclosure of reserves within equity [abstract]
Other reserves	As at 30.06.24 As at 31.12.23 £m £m Currency translation reserve 3,676 3,783 Fair value through other comprehensive income reserve (1,493) (1,207) Cash flow hedging reserve (3,064) (2,895) Own credit reserve (702) (240) Other reserves 196 196 Total (1,387) (363)

Contingent liabilities and co_2

Contingent liabilities and commitments (Tables)	6 Months Ended
	Jun. 30, 2024
Disclosure of contingent liabilities [abstract]
Contingent liabilities and commitments	As at 30.06.24 As at 31.12.23 Contingent liabilities and financial guarantees £m £m Guarantees and letters of credit pledged as collateral security 17,272 17,578 Performance guarantees, acceptances and endorsements 9,553 9,251 Total 26,825 26,829 Commitments Documentary credits and other short-term trade related transactions 2,489 2,352 Standby facilities, credit lines and other commitments 347,530 335,583 Total 350,019 337,935

Credit risk - Loans and advance

Credit risk - Loans and advances at amortised cost by product (Details) £ in Millions	Jun. 30, 2024 GBP (£)	Dec. 31, 2023 GBP (£)
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Provisions	£ 757	£ 817
Expected credit losses held against contingent liabilities and commitments
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Provisions	452	473
Total loans and advances at amortised cost including debt securities | Financial assets 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	£ 190,572	£ 185,247
Coverage ratio	0.021	0.021
Total loans and advances at amortised cost including debt securities | Financial assets 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	£ 174,004	£ 167,966
Coverage ratio	0.003	0.004
Total loans and advances at amortised cost including debt securities | Financial assets 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	£ 14,791	£ 15,430
Coverage ratio	0.084	0.088
Total loans and advances at amortised cost including debt securities | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Not past due
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 14,028	£ 14,619
Coverage ratio	0.069	0.072
Total loans and advances at amortised cost including debt securities | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Not later than 30 days past due
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 272	£ 435
Coverage ratio	0.351	0.263
Total loans and advances at amortised cost including debt securities | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | >30 days past due
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 491	£ 376
Coverage ratio	0.259	0.344
Total loans and advances at amortised cost including debt securities | Financial assets 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	£ 1,777	£ 1,851
Coverage ratio	0.555	0.510
Total loans and advances at amortised cost | Financial assets 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	£ 145,773	£ 146,201
Coverage ratio	0.028	0.027
Total loans and advances at amortised cost | Financial assets 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	£ 132,751	£ 132,652
Coverage ratio	0.004	0.005
Total loans and advances at amortised cost | Financial assets 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	£ 11,245	£ 11,698
Coverage ratio	0.107	0.112
Total loans and advances at amortised cost | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Not past due
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 10,482	£ 10,887
Coverage ratio	0.089	0.094
Total loans and advances at amortised cost | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Not later than 30 days past due
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 272	£ 435
Coverage ratio	0.351	0.263
Total loans and advances at amortised cost | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | >30 days past due
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 491	£ 376
Coverage ratio	0.259	0.344
Total loans and advances at amortised cost | Financial assets 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	£ 1,777	£ 1,851
Coverage ratio	0.555	0.510
Retail mortgages | Financial assets 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	£ 4,968	£ 8,002
Coverage ratio	0.055	0.043
Retail mortgages | Financial assets 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	£ 4,581	£ 7,246
Coverage ratio	0.001	0.002
Retail mortgages | Financial assets 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	£ 69	£ 361
Coverage ratio	0	0.072
Retail mortgages | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Not past due
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 15	£ 319
Coverage ratio	0	0.067
Retail mortgages | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Not later than 30 days past due
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 3	£ 11
Coverage ratio	0	0.214
Retail mortgages | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | >30 days past due
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 51	£ 31
Coverage ratio	0	0.061
Retail mortgages | Financial assets 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	£ 318	£ 395
Coverage ratio	0.471	0.448
Retail credit cards | Financial assets 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	£ 23,954	£ 24,511
Coverage ratio	0.111	0.102
Retail credit cards | Financial assets 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	£ 21,367	£ 21,903
Coverage ratio	0.018	0.018
Retail credit cards | Financial assets 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	£ 2,250	£ 2,312
Coverage ratio	0.323	0.330
Retail credit cards | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Not past due
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 1,976	£ 2,013
Coverage ratio	0.281	0.286
Retail credit cards | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Not later than 30 days past due
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 176	£ 194
Coverage ratio	0.443	0.428
Retail credit cards | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | >30 days past due
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 98	£ 105
Coverage ratio	0.626	0.642
Retail credit cards | Financial assets 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	£ 337	£ 296
Coverage ratio	0.817	0.806
Retail other | Financial assets 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	£ 3,598	£ 3,366
Coverage ratio	0.010	0.013
Retail other | Financial assets 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	£ 3,011	£ 2,726
Coverage ratio	0.002	0.003
Retail other | Financial assets 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	£ 394	£ 367
Coverage ratio	0.008	0.005
Retail other | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Not past due
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 236	£ 208
Coverage ratio	0.013	0.010
Retail other | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Not later than 30 days past due
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 51	£ 71
Coverage ratio	0	0
Retail other | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | >30 days past due
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 107	£ 88
Coverage ratio	0	0
Retail other | Financial assets 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	£ 193	£ 273
Coverage ratio	0.131	0.114
Corporate loans | Financial assets 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	£ 113,253	£ 110,322
Coverage ratio	0.007	0.008
Corporate loans | Financial assets 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	£ 103,792	£ 100,777
Coverage ratio	0.002	0.002
Corporate loans | Financial assets 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	£ 8,532	£ 8,658
Coverage ratio	0.030	0.034
Corporate loans | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Not past due
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 8,255	£ 8,347
Coverage ratio	0.029	0.034
Corporate loans | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Not later than 30 days past due
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 42	£ 159
Coverage ratio	0.143	0.042
Corporate loans | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | >30 days past due
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 235	£ 152
Coverage ratio	0.033	0.044
Corporate loans | Financial assets 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	£ 929	£ 887
Coverage ratio	0.300	0.282
Debt securities at amortised cost | Financial assets 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	£ 44,799	£ 39,046
Coverage ratio	0	0.001
Debt securities at amortised cost | Financial assets 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	£ 41,253	£ 35,314
Coverage ratio	0	0
Debt securities at amortised cost | Financial assets 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	£ 3,546	£ 3,732
Coverage ratio	0.003	0.005
Debt securities at amortised cost | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Not past due
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 3,546	£ 3,732
Coverage ratio	0.003	0.005
Debt securities at amortised cost | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Not later than 30 days past due
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 0	£ 0
Coverage ratio	0	0
Debt securities at amortised cost | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | >30 days past due
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 0	£ 0
Coverage ratio	0	0
Debt securities at amortised cost | Financial assets 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	£ 0	£ 0
Coverage ratio	0	0
Gross exposure | Total loans and advances at amortised cost including debt securities | Financial assets 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	£ 194,730	£ 189,288
Gross exposure | Total loans and advances at amortised cost including debt securities | Financial assets 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	174,591	168,583
Gross exposure | Total loans and advances at amortised cost including debt securities | Financial assets 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	16,144	16,924
Gross exposure | Total loans and advances at amortised cost including debt securities | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Not past due
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	15,062	15,761
Gross exposure | Total loans and advances at amortised cost including debt securities | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Not later than 30 days past due
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	419	590
Gross exposure | Total loans and advances at amortised cost including debt securities | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | >30 days past due
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	663	573
Gross exposure | Total loans and advances at amortised cost including debt securities | Financial assets 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	3,995	3,781
Gross exposure | Total loans and advances at amortised cost | Financial assets 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	149,913	150,218
Gross exposure | Total loans and advances at amortised cost | Financial assets 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	133,330	133,262
Gross exposure | Total loans and advances at amortised cost | Financial assets 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	12,588	13,175
Gross exposure | Total loans and advances at amortised cost | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Not past due
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	11,506	12,012
Gross exposure | Total loans and advances at amortised cost | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Not later than 30 days past due
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	419	590
Gross exposure | Total loans and advances at amortised cost | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | >30 days past due
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	663	573
Gross exposure | Total loans and advances at amortised cost | Financial assets 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	3,995	3,781
Gross exposure | Retail mortgages | Financial assets 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	5,257	8,362
Gross exposure | Retail mortgages | Financial assets 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	4,587	7,257
Gross exposure | Retail mortgages | Financial assets 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	69	389
Gross exposure | Retail mortgages | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Not past due
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	15	342
Gross exposure | Retail mortgages | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Not later than 30 days past due
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	3	14
Gross exposure | Retail mortgages | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | >30 days past due
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	51	33
Gross exposure | Retail mortgages | Financial assets 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	601	716
Gross exposure | Retail credit cards | Financial assets 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	26,935	27,287
Gross exposure | Retail credit cards | Financial assets 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	21,766	22,315
Gross exposure | Retail credit cards | Financial assets 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	3,325	3,450
Gross exposure | Retail credit cards | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Not past due
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	2,747	2,818
Gross exposure | Retail credit cards | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Not later than 30 days past due
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	316	339
Gross exposure | Retail credit cards | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | >30 days past due
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	262	293
Gross exposure | Retail credit cards | Financial assets 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	1,844	1,522
Gross exposure | Retail other | Financial assets 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	3,636	3,411
Gross exposure | Retail other | Financial assets 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	3,017	2,734
Gross exposure | Retail other | Financial assets 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	397	369
Gross exposure | Retail other | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Not past due
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	239	210
Gross exposure | Retail other | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Not later than 30 days past due
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	51	71
Gross exposure | Retail other | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | >30 days past due
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	107	88
Gross exposure | Retail other | Financial assets 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	222	308
Gross exposure | Corporate loans | Financial assets 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	114,085	111,158
Gross exposure | Corporate loans | Financial assets 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	103,960	100,956
Gross exposure | Corporate loans | Financial assets 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	8,797	8,967
Gross exposure | Corporate loans | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Not past due
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	8,505	8,642
Gross exposure | Corporate loans | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Not later than 30 days past due
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	49	166
Gross exposure | Corporate loans | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | >30 days past due
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	243	159
Gross exposure | Corporate loans | Financial assets 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	1,328	1,235
Gross exposure | Debt securities at amortised cost | Financial assets 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	44,817	39,070
Gross exposure | Debt securities at amortised cost | Financial assets 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	41,261	35,321
Gross exposure | Debt securities at amortised cost | Financial assets 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	3,556	3,749
Gross exposure | Debt securities at amortised cost | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Not past due
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	3,556	3,749
Gross exposure | Debt securities at amortised cost | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Not later than 30 days past due
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	0	0
Gross exposure | Debt securities at amortised cost | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | >30 days past due
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	0	0
Gross exposure | Debt securities at amortised cost | Financial assets 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	0	0
Gross exposure | Other financial assets subject to impairment
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	193,900	157,700
Gross exposure | Other financial assets subject to impairment | 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	192,800	157,300
Gross exposure | Other financial assets subject to impairment | 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	1,000	243
Gross exposure | Other assets | 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	136	136
Impairment allowance | Total loans and advances at amortised cost including debt securities | Financial assets 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	4,158	4,041
Impairment allowance | Total loans and advances at amortised cost including debt securities | Financial assets 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	587	617
Impairment allowance | Total loans and advances at amortised cost including debt securities | Financial assets 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	1,353	1,494
Impairment allowance | Total loans and advances at amortised cost including debt securities | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Not past due
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	1,034	1,142
Impairment allowance | Total loans and advances at amortised cost including debt securities | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Not later than 30 days past due
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	147	155
Impairment allowance | Total loans and advances at amortised cost including debt securities | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | >30 days past due
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	172	197
Impairment allowance | Total loans and advances at amortised cost including debt securities | Financial assets 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	2,218	1,930
Impairment allowance | Total loans and advances at amortised cost | Financial assets 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	4,140	4,017
Impairment allowance | Total loans and advances at amortised cost | Financial assets 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	579	610
Impairment allowance | Total loans and advances at amortised cost | Financial assets 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	1,343	1,477
Impairment allowance | Total loans and advances at amortised cost | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Not past due
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	1,024	1,125
Impairment allowance | Total loans and advances at amortised cost | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Not later than 30 days past due
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	147	155
Impairment allowance | Total loans and advances at amortised cost | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | >30 days past due
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	172	197
Impairment allowance | Total loans and advances at amortised cost | Financial assets 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	2,218	1,930
Impairment allowance | Retail mortgages | Financial assets 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	289	360
Impairment allowance | Retail mortgages | Financial assets 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	6	11
Impairment allowance | Retail mortgages | Financial assets 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	0	28
Impairment allowance | Retail mortgages | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Not past due
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	0	23
Impairment allowance | Retail mortgages | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Not later than 30 days past due
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	0	3
Impairment allowance | Retail mortgages | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | >30 days past due
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
Impairment allowance | Retail mortgages | Financial assets 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	283	321
Impairment allowance | Retail credit cards | Financial assets 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	2,981	2,776
Impairment allowance | Retail credit cards | Financial assets 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	399	412
Impairment allowance | Retail credit cards | Financial assets 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	1,075	1,138
Impairment allowance | Retail credit cards | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Not past due
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	771	805
Impairment allowance | Retail credit cards | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Not later than 30 days past due
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	140	145
Impairment allowance | Retail credit cards | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | >30 days past due
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	164	188
Impairment allowance | Retail credit cards | Financial assets 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	1,507	1,226
Impairment allowance | Retail other | Financial assets 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	38	45
Impairment allowance | Retail other | Financial assets 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	6	8
Impairment allowance | Retail other | Financial assets 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	3	2
Impairment allowance | Retail other | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Not past due
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	3	2
Impairment allowance | Retail other | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Not later than 30 days past due
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	0	0
Impairment allowance | Retail other | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | >30 days past due
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	0	0
Impairment allowance | Retail other | Financial assets 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	29	35
Impairment allowance | Corporate loans | Financial assets 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	832	836
Impairment allowance | Corporate loans | Financial assets 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	168	179
Impairment allowance | Corporate loans | Financial assets 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	265	309
Impairment allowance | Corporate loans | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Not past due
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	250	295
Impairment allowance | Corporate loans | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Not later than 30 days past due
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	7	7
Impairment allowance | Corporate loans | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | >30 days past due
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	8	7
Impairment allowance | Corporate loans | Financial assets 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	399	348
Impairment allowance | Debt securities at amortised cost | Financial assets 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	18	24
Impairment allowance | Debt securities at amortised cost | Financial assets 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	8	7
Impairment allowance | Debt securities at amortised cost | Financial assets 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	10	17
Impairment allowance | Debt securities at amortised cost | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Not past due
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	10	17
Impairment allowance | Debt securities at amortised cost | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Not later than 30 days past due
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	0	0
Impairment allowance | Debt securities at amortised cost | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | >30 days past due
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	0	0
Impairment allowance | Debt securities at amortised cost | Financial assets 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	0	0
Impairment allowance | Other financial assets subject to impairment
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	149	145
Impairment allowance | Other financial assets subject to impairment | 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	16	14
Impairment allowance | Other financial assets subject to impairment | 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
Impairment allowance | Other assets | 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	£ 130	£ 130

Credit risk - Disclosure of ass

Credit risk - Disclosure of assets held for sale (Details) - Assets classified as held for sale - German Consumer Finance portfolio £ in Millions	Jun. 30, 2024 GBP (£)	Dec. 31, 2023 GBP (£)
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	0.060	0.058
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	0.012	0.011
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	0.107	0.100
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	0.715	0.727
Retail credit cards
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Coverage ratio	0.057	0.057
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]
Coverage ratio	0.010	0.009
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]
Coverage ratio	0.091	0.092
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]
Coverage ratio	0.731	0.739
Retail other
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Coverage ratio	0.064	0.058
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]
Coverage ratio	0.013	0.013
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]
Coverage ratio	0.135	0.111
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]
Coverage ratio	0.696	0.714
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	£ 3,905	£ 4,091
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	3,021	3,182
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	712	733
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	172	176
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	2,206	2,158
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	1,660	1,621
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	453	445
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	93	92
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	1,699	1,933
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	1,361	1,561
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	259	288
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	79	84
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	234	236
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	35	35
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	76	73
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	123	128
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	126	124
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	17	15
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	41	41
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	68	68
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	108	112
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	18	20
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	35	32
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	£ 55	£ 60

Credit risk - Movement in gross

Credit risk - Movement in gross exposures and impairment allowance (Details) - GBP (£) £ in Millions	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Loans and advances at amortised cost
Opening balance	£ 4,514
Ending balance	4,610
Reconciliation of ECL movement to impairment charge/(release) for the period
Recoveries and reimbursements	(32)
ECL charge on assets held for sale	44
Total exchange and other adjustments	(25)
Total income statement charge for the period	831	£ 688
Financial guarantee contracts
Reconciliation of ECL movement to impairment charge/(release) for the period
Reimbursements	18	7
Stage 1
Reconciliation of ECL movement to impairment charge/(release) for the period
Recoveries and reimbursements	(31)
Lifetime expected credit losses | Stage 2
Reconciliation of ECL movement to impairment charge/(release) for the period
Recoveries and reimbursements	25
Lifetime expected credit losses | Stage 3
Reconciliation of ECL movement to impairment charge/(release) for the period
Recoveries and reimbursements	(26)
Total loans and advances at amortised cost
Loans and advances at amortised cost
Opening balance	4,490
Ending balance	4,592
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	867
Total loans and advances at amortised cost | Stage 1
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	(5)
Total loans and advances at amortised cost | Lifetime expected credit losses | Stage 2
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	(34)
Total loans and advances at amortised cost | Lifetime expected credit losses | Stage 3
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	906
Total loans and advances at amortised cost | Financial assets at amortised cost
Loans and advances at amortised cost
Write-offs	(585)	(404)
Reconciliation of ECL movement to impairment charge/(release) for the period
Post write-off recoveries	14	7
Net write-offs	571	£ 397
Retail mortgages
Loans and advances at amortised cost
Opening balance	360
Ending balance	289
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	3
Retail mortgages | Stage 1
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	0
Retail mortgages | Lifetime expected credit losses | Stage 2
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	1
Retail mortgages | Lifetime expected credit losses | Stage 3
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	2
Retail credit cards
Loans and advances at amortised cost
Opening balance	2,861
Ending balance	3,065
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	767
Retail credit cards | Stage 1
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	7
Retail credit cards | Lifetime expected credit losses | Stage 2
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	7
Retail credit cards | Lifetime expected credit losses | Stage 3
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	753
Retail other
Loans and advances at amortised cost
Opening balance	52
Ending balance	43
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	1
Retail other | Stage 1
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	(2)
Retail other | Lifetime expected credit losses | Stage 2
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	1
Retail other | Lifetime expected credit losses | Stage 3
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	2
Corporate loans
Loans and advances at amortised cost
Opening balance	1,217
Ending balance	1,195
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	96
Corporate loans | Stage 1
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	(10)
Corporate loans | Lifetime expected credit losses | Stage 2
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	(43)
Corporate loans | Lifetime expected credit losses | Stage 3
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	149
ECL movement on loan commitments and other financial guarantees
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	(21)
ECL movement on loan commitments and other financial guarantees | Stage 1
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	15
ECL movement on loan commitments and other financial guarantees | Lifetime expected credit losses | Stage 2
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	(23)
ECL movement on loan commitments and other financial guarantees | Lifetime expected credit losses | Stage 3
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	(13)
ECL movement on other financial assets
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	4
ECL movement on other financial assets | Stage 1
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	2
ECL movement on other financial assets | Lifetime expected credit losses | Stage 2
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	2
ECL movement on other financial assets | Lifetime expected credit losses | Stage 3
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	0
ECL movement on debt securities at amortised cost
Loans and advances at amortised cost
Opening balance	24
Ending balance	18
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	(6)
ECL movement on debt securities at amortised cost | Stage 1
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	1
ECL movement on debt securities at amortised cost | Lifetime expected credit losses | Stage 2
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	(7)
ECL movement on debt securities at amortised cost | Lifetime expected credit losses | Stage 3
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	0
Gross exposure | Retail mortgages | Financial assets at amortised cost
Loans and advances at amortised cost
Opening balance	8,362
Business activity in the period	247
Refinements to models used for calculation	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	167
Final repayments	(589)
Disposals	2,922
Write-offs	(8)
Ending balance	5,257
Gross exposure | Retail mortgages | Financial assets at amortised cost | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	0
Gross exposure | Retail mortgages | Financial assets at amortised cost | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	0
Gross exposure | Retail mortgages | Financial assets at amortised cost | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	0
Gross exposure | Retail mortgages | Financial assets at amortised cost | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	0
Gross exposure | Retail mortgages | Financial assets at amortised cost | Stage 1
Loans and advances at amortised cost
Opening balance	7,257
Business activity in the period	247
Refinements to models used for calculation	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	127
Final repayments	(505)
Disposals	2,477
Write-offs	0
Ending balance	4,587
Gross exposure | Retail mortgages | Financial assets at amortised cost | Stage 1 | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	(136)
Gross exposure | Retail mortgages | Financial assets at amortised cost | Stage 1 | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	90
Gross exposure | Retail mortgages | Financial assets at amortised cost | Stage 1 | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	(34)
Gross exposure | Retail mortgages | Financial assets at amortised cost | Stage 1 | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	18
Gross exposure | Retail mortgages | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2
Loans and advances at amortised cost
Opening balance	389
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	(7)
Final repayments	(31)
Disposals	316
Write-offs	0
Ending balance	69
Gross exposure | Retail mortgages | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	136
Gross exposure | Retail mortgages | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	(90)
Gross exposure | Retail mortgages | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	(30)
Gross exposure | Retail mortgages | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	18
Gross exposure | Retail mortgages | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3
Loans and advances at amortised cost
Opening balance	716
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	47
Final repayments	(53)
Disposals	129
Write-offs	(8)
Ending balance	601
Gross exposure | Retail mortgages | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	0
Gross exposure | Retail mortgages | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	0
Gross exposure | Retail mortgages | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	64
Gross exposure | Retail mortgages | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	(36)
Gross exposure | Retail credit cards | Financial assets at amortised cost
Loans and advances at amortised cost
Opening balance	27,287
Business activity in the period	750
Refinements to models used for calculation	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	323
Final repayments	(78)
Disposals	876
Write-offs	(471)
Ending balance	26,935
Gross exposure | Retail credit cards | Financial assets at amortised cost | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	0
Gross exposure | Retail credit cards | Financial assets at amortised cost | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	0
Gross exposure | Retail credit cards | Financial assets at amortised cost | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	0
Gross exposure | Retail credit cards | Financial assets at amortised cost | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	0
Gross exposure | Retail credit cards | Financial assets at amortised cost | Stage 1
Loans and advances at amortised cost
Opening balance	22,315
Business activity in the period	715
Refinements to models used for calculation	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	22
Final repayments	(61)
Disposals	699
Write-offs	0
Ending balance	21,766
Gross exposure | Retail credit cards | Financial assets at amortised cost | Stage 1 | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	(1,358)
Gross exposure | Retail credit cards | Financial assets at amortised cost | Stage 1 | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	1,038
Gross exposure | Retail credit cards | Financial assets at amortised cost | Stage 1 | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	(211)
Gross exposure | Retail credit cards | Financial assets at amortised cost | Stage 1 | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	5
Gross exposure | Retail credit cards | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2
Loans and advances at amortised cost
Opening balance	3,450
Business activity in the period	34
Refinements to models used for calculation	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	309
Final repayments	(17)
Disposals	176
Write-offs	0
Ending balance	3,325
Gross exposure | Retail credit cards | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	1,358
Gross exposure | Retail credit cards | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	(1,038)
Gross exposure | Retail credit cards | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	(600)
Gross exposure | Retail credit cards | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	5
Gross exposure | Retail credit cards | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3
Loans and advances at amortised cost
Opening balance	1,522
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	(8)
Final repayments	0
Disposals	1
Write-offs	(471)
Ending balance	1,844
Gross exposure | Retail credit cards | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	0
Gross exposure | Retail credit cards | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	0
Gross exposure | Retail credit cards | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	811
Gross exposure | Retail credit cards | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	(10)
Gross exposure | Retail other | Financial assets at amortised cost
Loans and advances at amortised cost
Opening balance	3,411
Business activity in the period	761
Refinements to models used for calculation	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	869
Final repayments	(1,397)
Disposals	0
Write-offs	(8)
Ending balance	3,636
Gross exposure | Retail other | Financial assets at amortised cost | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	0
Gross exposure | Retail other | Financial assets at amortised cost | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	0
Gross exposure | Retail other | Financial assets at amortised cost | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	0
Gross exposure | Retail other | Financial assets at amortised cost | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	0
Gross exposure | Retail other | Financial assets at amortised cost | Stage 1
Loans and advances at amortised cost
Opening balance	2,734
Business activity in the period	717
Refinements to models used for calculation	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	874
Final repayments	(1,185)
Disposals	0
Write-offs	0
Ending balance	3,017
Gross exposure | Retail other | Financial assets at amortised cost | Stage 1 | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	(162)
Gross exposure | Retail other | Financial assets at amortised cost | Stage 1 | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	83
Gross exposure | Retail other | Financial assets at amortised cost | Stage 1 | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	(69)
Gross exposure | Retail other | Financial assets at amortised cost | Stage 1 | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	25
Gross exposure | Retail other | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2
Loans and advances at amortised cost
Opening balance	369
Business activity in the period	44
Refinements to models used for calculation	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(6)
Final repayments	(80)
Disposals	0
Write-offs	0
Ending balance	397
Gross exposure | Retail other | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	162
Gross exposure | Retail other | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	(83)
Gross exposure | Retail other | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	(54)
Gross exposure | Retail other | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	45
Gross exposure | Retail other | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3
Loans and advances at amortised cost
Opening balance	308
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	1
Final repayments	(132)
Disposals	0
Write-offs	(8)
Ending balance	222
Gross exposure | Retail other | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	0
Gross exposure | Retail other | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	0
Gross exposure | Retail other | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	123
Gross exposure | Retail other | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	(70)
Gross exposure | Corporate loans | Financial assets at amortised cost
Loans and advances at amortised cost
Opening balance	111,158
Business activity in the period	16,407
Refinements to models used for calculation	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	5,241
Final repayments	(18,588)
Disposals	35
Write-offs	(98)
Ending balance	114,085
Gross exposure | Corporate loans | Financial assets at amortised cost | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	0
Gross exposure | Corporate loans | Financial assets at amortised cost | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	0
Gross exposure | Corporate loans | Financial assets at amortised cost | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	0
Gross exposure | Corporate loans | Financial assets at amortised cost | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	0
Gross exposure | Corporate loans | Financial assets at amortised cost | Stage 1
Loans and advances at amortised cost
Opening balance	100,956
Business activity in the period	15,771
Refinements to models used for calculation	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	5,039
Final repayments	(17,470)
Disposals	30
Write-offs	0
Ending balance	103,960
Gross exposure | Corporate loans | Financial assets at amortised cost | Stage 1 | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	(2,083)
Gross exposure | Corporate loans | Financial assets at amortised cost | Stage 1 | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	1,742
Gross exposure | Corporate loans | Financial assets at amortised cost | Stage 1 | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	(59)
Gross exposure | Corporate loans | Financial assets at amortised cost | Stage 1 | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	94
Gross exposure | Corporate loans | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2
Loans and advances at amortised cost
Opening balance	8,967
Business activity in the period	586
Refinements to models used for calculation	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	229
Final repayments	(1,011)
Disposals	5
Write-offs	0
Ending balance	8,797
Gross exposure | Corporate loans | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	2,083
Gross exposure | Corporate loans | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	(1,742)
Gross exposure | Corporate loans | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	(317)
Gross exposure | Corporate loans | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	7
Gross exposure | Corporate loans | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3
Loans and advances at amortised cost
Opening balance	1,235
Business activity in the period	50
Refinements to models used for calculation	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(27)
Final repayments	(107)
Disposals	0
Write-offs	(98)
Ending balance	1,328
Gross exposure | Corporate loans | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	0
Gross exposure | Corporate loans | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	0
Gross exposure | Corporate loans | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	376
Gross exposure | Corporate loans | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	(101)
ECL | Retail mortgages | Financial assets at amortised cost
Loans and advances at amortised cost
Opening balance	360
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	7
Final repayments	(4)
Disposals	66
Write-offs	(8)
Ending balance	289
ECL | Retail mortgages | Financial assets at amortised cost | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	0
ECL | Retail mortgages | Financial assets at amortised cost | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	0
ECL | Retail mortgages | Financial assets at amortised cost | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	0
ECL | Retail mortgages | Financial assets at amortised cost | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	0
ECL | Retail mortgages | Financial assets at amortised cost | Stage 1
Loans and advances at amortised cost
Opening balance	11
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	(1)
Disposals	5
Write-offs	0
Ending balance	6
ECL | Retail mortgages | Financial assets at amortised cost | Stage 1 | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	0
ECL | Retail mortgages | Financial assets at amortised cost | Stage 1 | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	3
ECL | Retail mortgages | Financial assets at amortised cost | Stage 1 | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	0
ECL | Retail mortgages | Financial assets at amortised cost | Stage 1 | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	1
ECL | Retail mortgages | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2
Loans and advances at amortised cost
Opening balance	28
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	7
Final repayments	(1)
Disposals	29
Write-offs	0
Ending balance	0
ECL | Retail mortgages | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	0
ECL | Retail mortgages | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	(3)
ECL | Retail mortgages | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	(3)
ECL | Retail mortgages | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	1
ECL | Retail mortgages | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3
Loans and advances at amortised cost
Opening balance	321
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	(2)
Disposals	32
Write-offs	(8)
Ending balance	283
ECL | Retail mortgages | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	0
ECL | Retail mortgages | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	0
ECL | Retail mortgages | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	3
ECL | Retail mortgages | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	(2)
ECL | Retail credit cards | Financial assets at amortised cost
Loans and advances at amortised cost
Opening balance	2,776
Business activity in the period	29
Refinements to models used for calculation	43
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	706
Final repayments	(11)
Disposals	91
Write-offs	(471)
Ending balance	2,981
ECL | Retail credit cards | Financial assets at amortised cost | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	0
ECL | Retail credit cards | Financial assets at amortised cost | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	0
ECL | Retail credit cards | Financial assets at amortised cost | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	0
ECL | Retail credit cards | Financial assets at amortised cost | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	0
ECL | Retail credit cards | Financial assets at amortised cost | Stage 1
Loans and advances at amortised cost
Opening balance	412
Business activity in the period	16
Refinements to models used for calculation	27
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(263)
Final repayments	(4)
Disposals	20
Write-offs	0
Ending balance	399
ECL | Retail credit cards | Financial assets at amortised cost | Stage 1 | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	(49)
ECL | Retail credit cards | Financial assets at amortised cost | Stage 1 | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	285
ECL | Retail credit cards | Financial assets at amortised cost | Stage 1 | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	(9)
ECL | Retail credit cards | Financial assets at amortised cost | Stage 1 | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	4
ECL | Retail credit cards | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2
Loans and advances at amortised cost
Opening balance	1,138
Business activity in the period	13
Refinements to models used for calculation	5
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	525
Final repayments	(7)
Disposals	70
Write-offs	0
Ending balance	1,075
ECL | Retail credit cards | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	49
ECL | Retail credit cards | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	(285)
ECL | Retail credit cards | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	(296)
ECL | Retail credit cards | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	3
ECL | Retail credit cards | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3
Loans and advances at amortised cost
Opening balance	1,226
Business activity in the period	0
Refinements to models used for calculation	11
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	444
Final repayments	0
Disposals	1
Write-offs	(471)
Ending balance	1,507
ECL | Retail credit cards | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	0
ECL | Retail credit cards | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	0
ECL | Retail credit cards | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	305
ECL | Retail credit cards | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	(7)
ECL | Retail other | Financial assets at amortised cost
Loans and advances at amortised cost
Opening balance	45
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	5
Final repayments	(5)
Disposals	0
Write-offs	(8)
Ending balance	38
ECL | Retail other | Financial assets at amortised cost | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	0
ECL | Retail other | Financial assets at amortised cost | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	0
ECL | Retail other | Financial assets at amortised cost | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	0
ECL | Retail other | Financial assets at amortised cost | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	0
ECL | Retail other | Financial assets at amortised cost | Stage 1
Loans and advances at amortised cost
Opening balance	8
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	(1)
Final repayments	(2)
Disposals	0
Write-offs	0
Ending balance	6
ECL | Retail other | Financial assets at amortised cost | Stage 1 | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	0
ECL | Retail other | Financial assets at amortised cost | Stage 1 | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	0
ECL | Retail other | Financial assets at amortised cost | Stage 1 | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	0
ECL | Retail other | Financial assets at amortised cost | Stage 1 | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	0
ECL | Retail other | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2
Loans and advances at amortised cost
Opening balance	2
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	2
Final repayments	(1)
Disposals	0
Write-offs	0
Ending balance	3
ECL | Retail other | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	0
ECL | Retail other | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	0
ECL | Retail other | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	0
ECL | Retail other | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	0
ECL | Retail other | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3
Loans and advances at amortised cost
Opening balance	35
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	4
Final repayments	(2)
Disposals	0
Write-offs	(8)
Ending balance	29
ECL | Retail other | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	0
ECL | Retail other | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	0
ECL | Retail other | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	0
ECL | Retail other | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	0
ECL | Corporate loans | Financial assets at amortised cost
Loans and advances at amortised cost
Opening balance	836
Business activity in the period	40
Refinements to models used for calculation	21
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	104
Final repayments	(69)
Disposals	2
Write-offs	(98)
Ending balance	832
ECL | Corporate loans | Financial assets at amortised cost | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	0
ECL | Corporate loans | Financial assets at amortised cost | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	0
ECL | Corporate loans | Financial assets at amortised cost | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	0
ECL | Corporate loans | Financial assets at amortised cost | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	0
ECL | Corporate loans | Financial assets at amortised cost | Stage 1
Loans and advances at amortised cost
Opening balance	179
Business activity in the period	24
Refinements to models used for calculation	3
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(55)
Final repayments	(20)
Disposals	1
Write-offs	0
Ending balance	168
ECL | Corporate loans | Financial assets at amortised cost | Stage 1 | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	(11)
ECL | Corporate loans | Financial assets at amortised cost | Stage 1 | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	49
ECL | Corporate loans | Financial assets at amortised cost | Stage 1 | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	(1)
ECL | Corporate loans | Financial assets at amortised cost | Stage 1 | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	1
ECL | Corporate loans | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2
Loans and advances at amortised cost
Opening balance	309
Business activity in the period	15
Refinements to models used for calculation	18
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	24
Final repayments	(47)
Disposals	1
Write-offs	0
Ending balance	265
ECL | Corporate loans | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	11
ECL | Corporate loans | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	(49)
ECL | Corporate loans | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	(16)
ECL | Corporate loans | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	1
ECL | Corporate loans | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3
Loans and advances at amortised cost
Opening balance	348
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	135
Final repayments	(2)
Disposals	0
Write-offs	(98)
Ending balance	399
ECL | Corporate loans | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	0
ECL | Corporate loans | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	0
ECL | Corporate loans | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	17
ECL | Corporate loans | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	£ (2)

Credit risk - Provisions for lo

Credit risk - Provisions for loan commitment and financial guarantees (Details) £ in Millions	6 Months Ended
	Jun. 30, 2024 GBP (£)
Gross exposure | Retail mortgages
Loan commitments and financial guarantees
Opening balance	£ 42
Net transfers between stages	0
Business activity in the year	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	5
Limit management and final repayments	(7)
Ending balance	40
Gross exposure | Retail credit cards
Loan commitments and financial guarantees
Opening balance	111,411
Net transfers between stages	0
Business activity in the year	7,599
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	2,158
Limit management and final repayments	(5,806)
Ending balance	115,362
Gross exposure | Retail other
Loan commitments and financial guarantees
Opening balance	3,591
Net transfers between stages	0
Business activity in the year	526
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	282
Limit management and final repayments	(563)
Ending balance	3,836
Gross exposure | Corporate loans
Loan commitments and financial guarantees
Opening balance	233,251
Net transfers between stages	0
Business activity in the year	50,769
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	5,513
Limit management and final repayments	(51,177)
Ending balance	238,356
ECL | Retail mortgages
Loan commitments and financial guarantees
Opening balance	0
Net transfers between stages	0
Business activity in the year	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	0
Limit management and final repayments	0
Ending balance	0
ECL | Retail credit cards
Loan commitments and financial guarantees
Opening balance	85
Net transfers between stages	0
Business activity in the year	10
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	4
Limit management and final repayments	(15)
Ending balance	84
ECL | Retail other
Loan commitments and financial guarantees
Opening balance	7
Net transfers between stages	0
Business activity in the year	1
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(3)
Limit management and final repayments	0
Ending balance	5
ECL | Corporate loans
Loan commitments and financial guarantees
Opening balance	381
Net transfers between stages	0
Business activity in the year	39
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(4)
Limit management and final repayments	(53)
Ending balance	363
Stage 1 | Gross exposure | Retail mortgages
Loan commitments and financial guarantees
Opening balance	41
Net transfers between stages	0
Business activity in the year	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	5
Limit management and final repayments	(7)
Ending balance	39
Stage 1 | Gross exposure | Retail credit cards
Loan commitments and financial guarantees
Opening balance	109,634
Net transfers between stages	(920)
Business activity in the year	7,550
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	2,935
Limit management and final repayments	(5,567)
Ending balance	113,632
Stage 1 | Gross exposure | Retail other
Loan commitments and financial guarantees
Opening balance	3,446
Net transfers between stages	(4)
Business activity in the year	442
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	316
Limit management and final repayments	(540)
Ending balance	3,660
Stage 1 | Gross exposure | Corporate loans
Loan commitments and financial guarantees
Opening balance	212,414
Net transfers between stages	2,335
Business activity in the year	48,333
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	5,058
Limit management and final repayments	(46,540)
Ending balance	221,600
Stage 1 | ECL | Retail mortgages
Loan commitments and financial guarantees
Opening balance	0
Net transfers between stages	0
Business activity in the year	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	0
Limit management and final repayments	0
Ending balance	0
Stage 1 | ECL | Retail credit cards
Loan commitments and financial guarantees
Opening balance	48
Net transfers between stages	21
Business activity in the year	7
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(16)
Limit management and final repayments	(5)
Ending balance	55
Stage 1 | ECL | Retail other
Loan commitments and financial guarantees
Opening balance	5
Net transfers between stages	0
Business activity in the year	1
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(1)
Limit management and final repayments	0
Ending balance	5
Stage 1 | ECL | Corporate loans
Loan commitments and financial guarantees
Opening balance	114
Net transfers between stages	35
Business activity in the year	19
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(34)
Limit management and final repayments	(12)
Ending balance	122
Lifetime expected credit losses | Stage 2 | Gross exposure | Retail mortgages
Loan commitments and financial guarantees
Opening balance	0
Net transfers between stages	0
Business activity in the year	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	0
Limit management and final repayments	0
Ending balance	0
Lifetime expected credit losses | Stage 2 | Gross exposure | Retail credit cards
Loan commitments and financial guarantees
Opening balance	1,767
Net transfers between stages	918
Business activity in the year	48
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(774)
Limit management and final repayments	(239)
Ending balance	1,720
Lifetime expected credit losses | Stage 2 | Gross exposure | Retail other
Loan commitments and financial guarantees
Opening balance	116
Net transfers between stages	(2)
Business activity in the year	84
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(35)
Limit management and final repayments	(7)
Ending balance	156
Lifetime expected credit losses | Stage 2 | Gross exposure | Corporate loans
Loan commitments and financial guarantees
Opening balance	20,035
Net transfers between stages	(2,482)
Business activity in the year	2,364
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	552
Limit management and final repayments	(4,533)
Ending balance	15,936
Lifetime expected credit losses | Stage 2 | ECL | Retail mortgages
Loan commitments and financial guarantees
Opening balance	0
Net transfers between stages	0
Business activity in the year	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	0
Limit management and final repayments	0
Ending balance	0
Lifetime expected credit losses | Stage 2 | ECL | Retail credit cards
Loan commitments and financial guarantees
Opening balance	36
Net transfers between stages	(21)
Business activity in the year	3
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	20
Limit management and final repayments	(10)
Ending balance	28
Lifetime expected credit losses | Stage 2 | ECL | Retail other
Loan commitments and financial guarantees
Opening balance	2
Net transfers between stages	0
Business activity in the year	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(2)
Limit management and final repayments	0
Ending balance	0
Lifetime expected credit losses | Stage 2 | ECL | Corporate loans
Loan commitments and financial guarantees
Opening balance	225
Net transfers between stages	(37)
Business activity in the year	20
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	40
Limit management and final repayments	(36)
Ending balance	212
Lifetime expected credit losses | Stage 3 | Gross exposure | Retail mortgages
Loan commitments and financial guarantees
Opening balance	1
Net transfers between stages	0
Business activity in the year	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	0
Limit management and final repayments	0
Ending balance	1
Lifetime expected credit losses | Stage 3 | Gross exposure | Retail credit cards
Loan commitments and financial guarantees
Opening balance	10
Net transfers between stages	2
Business activity in the year	1
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(3)
Limit management and final repayments	0
Ending balance	10
Lifetime expected credit losses | Stage 3 | Gross exposure | Retail other
Loan commitments and financial guarantees
Opening balance	29
Net transfers between stages	6
Business activity in the year	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	1
Limit management and final repayments	(16)
Ending balance	20
Lifetime expected credit losses | Stage 3 | Gross exposure | Corporate loans
Loan commitments and financial guarantees
Opening balance	802
Net transfers between stages	147
Business activity in the year	72
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(97)
Limit management and final repayments	(104)
Ending balance	820
Lifetime expected credit losses | Stage 3 | ECL | Retail mortgages
Loan commitments and financial guarantees
Opening balance	0
Net transfers between stages	0
Business activity in the year	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	0
Limit management and final repayments	0
Ending balance	0
Lifetime expected credit losses | Stage 3 | ECL | Retail credit cards
Loan commitments and financial guarantees
Opening balance	1
Net transfers between stages	0
Business activity in the year	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	0
Limit management and final repayments	0
Ending balance	1
Lifetime expected credit losses | Stage 3 | ECL | Retail other
Loan commitments and financial guarantees
Opening balance	0
Net transfers between stages	0
Business activity in the year	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	0
Limit management and final repayments	0
Ending balance	0
Lifetime expected credit losses | Stage 3 | ECL | Corporate loans
Loan commitments and financial guarantees
Opening balance	42
Net transfers between stages	2
Business activity in the year	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(10)
Limit management and final repayments	(5)
Ending balance	£ 29

Credit risk - Management adjust

Credit risk - Management adjustments to models for impairment (Details) - GBP (£) £ in Millions	Jun. 30, 2024	Dec. 31, 2023
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	£ 4,610	£ 4,514
Proportion of Management adjustments to total impairment allowance	0.50%	(0.40%)
Impairment allowance pre management adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	£ 4,589	£ 4,532
Management adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	21	(18)
Economic uncertainty adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	0	16
Other adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	21	(34)
Total loans and advances at amortised cost
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	£ 4,592	£ 4,490
Proportion of Management adjustments to total impairment allowance	0.70%	(0.40%)
Total loans and advances at amortised cost | Impairment allowance pre management adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	£ 4,562	£ 4,508
Total loans and advances at amortised cost | Modelled ECL
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	4,100	4,000
Total loans and advances at amortised cost | Individually assessed impairments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	300	300
Total loans and advances at amortised cost | Non-modelled exposures
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	200	200
Total loans and advances at amortised cost | Management adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	30	(18)
Total loans and advances at amortised cost | Economic uncertainty adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	0	16
Total loans and advances at amortised cost | Other adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	30	(34)
Total loans and advances at amortised cost | Stage 1 | Economic uncertainty adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets		4
Total loans and advances at amortised cost | Lifetime expected credit losses | Stage 2 | Economic uncertainty adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets		12
Total loans and advances at amortised cost | Lifetime expected credit losses | Stage 3 | Economic uncertainty adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets		0
Retail mortgages
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	£ 289	£ 360
Proportion of Management adjustments to total impairment allowance	(1.00%)	(0.80%)
Retail mortgages | Impairment allowance pre management adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	£ 292	£ 363
Retail mortgages | Management adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	(3)	(3)
Retail mortgages | Economic uncertainty adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	0	0
Retail mortgages | Other adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	(3)	(3)
Retail mortgages | Stage 1 | Economic uncertainty adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets		0
Retail mortgages | Lifetime expected credit losses | Stage 2 | Economic uncertainty adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets		0
Retail mortgages | Lifetime expected credit losses | Stage 3 | Economic uncertainty adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets		0
Retail credit cards
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	£ 3,065	£ 2,861
Proportion of Management adjustments to total impairment allowance	0%	0.30%
Retail credit cards | Impairment allowance pre management adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	£ 3,065	£ 2,852
Retail credit cards | Management adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	0	9
Retail credit cards | Economic uncertainty adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	0	0
Retail credit cards | Other adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	0	9
Retail credit cards | Stage 1 | Economic uncertainty adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets		0
Retail credit cards | Lifetime expected credit losses | Stage 2 | Economic uncertainty adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets		0
Retail credit cards | Lifetime expected credit losses | Stage 3 | Economic uncertainty adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets		0
Retail other
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	£ 43	£ 52
Proportion of Management adjustments to total impairment allowance	2.30%	(19.20%)
Retail other | Impairment allowance pre management adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	£ 42	£ 62
Retail other | Management adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	1	(10)
Retail other | Economic uncertainty adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	0	0
Retail other | Other adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	1	(10)
Retail other | Stage 1 | Economic uncertainty adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets		0
Retail other | Lifetime expected credit losses | Stage 2 | Economic uncertainty adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets		0
Retail other | Lifetime expected credit losses | Stage 3 | Economic uncertainty adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets		0
Corporate loans
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	£ 1,195	£ 1,217
Proportion of Management adjustments to total impairment allowance	2.70%	(1.20%)
Corporate loans | Impairment allowance pre management adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	£ 1,163	£ 1,231
Corporate loans | Management adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	32	(14)
Corporate loans | Economic uncertainty adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	0	16
Corporate loans | Other adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	32	(30)
Corporate loans | Stage 1 | Economic uncertainty adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets		4
Corporate loans | Lifetime expected credit losses | Stage 2 | Economic uncertainty adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets		12
Corporate loans | Lifetime expected credit losses | Stage 3 | Economic uncertainty adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets		0
Debt securities at amortised cost
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	£ 18	£ 24
Proportion of Management adjustments to total impairment allowance	(50.00%)	0%
Debt securities at amortised cost | Impairment allowance pre management adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	£ 27	£ 24
Debt securities at amortised cost | Management adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	(9)	0
Debt securities at amortised cost | Economic uncertainty adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	0	0
Debt securities at amortised cost | Other adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	(9)	£ 0
Cash collateral and settlements | Management adjustments | Barclays Investment Bank | Other financial assets subject to impairment
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	(2)
Financial assets at fair value through other comprehensive income | Management adjustments | Barclays Investment Bank | Other financial assets subject to impairment
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	£ (2)

Credit risk - Narrative (Detail

Credit risk - Narrative (Details) £ in Millions	6 Months Ended
	Jun. 30, 2024 GBP (£) economic_scenario	Dec. 31, 2023 GBP (£)
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	£ 4,610	£ 4,514
Number of economic scenarios, percentage	100%
Credit risk
Disclosure of financial assets [line items]
Number of economic scenarios | economic_scenario	5
Stress horizon period	5 years
Other adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	£ 21	(34)
Corporate loans
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	1,195	1,217
Corporate loans | Other adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	32	(30)
Debt securities at amortised cost
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	18	24
Debt securities at amortised cost | Other adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	£ (9)	£ 0

Credit risk - Macroeconomic var

Credit risk - Macroeconomic variables used in the calculation of ECL (Details)	Jun. 30, 2024	Dec. 31, 2023
Baseline
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	32.60%	32.40%
Baseline | GDP | 2024 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	0.70%	0.50%
Baseline | GDP | 2024 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	2.30%	2.40%
Baseline | GDP | 2025 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	1.20%	0.30%
Baseline | GDP | 2025 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	1.70%	1.30%
Baseline | GDP | 2026 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	1.60%	1.20%
Baseline | GDP | 2026 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	2%	1.70%
Baseline | GDP | 2027 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	1.70%	1.60%
Baseline | GDP | 2027 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	2%	1.90%
Baseline | GDP | 2028 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	1.60%	1.60%
Baseline | GDP | 2028 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	2%	1.90%
Baseline | Unemployment | 2024 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	4.30%	4.20%
Baseline | Unemployment | 2024 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	4%	3.70%
Baseline | Unemployment | 2025 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	4.40%	4.70%
Baseline | Unemployment | 2025 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	4.10%	4.30%
Baseline | Unemployment | 2026 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	4.40%	4.70%
Baseline | Unemployment | 2026 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	4.10%	4.30%
Baseline | Unemployment | 2027 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	4.40%	4.80%
Baseline | Unemployment | 2027 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	4.10%	4.30%
Baseline | Unemployment | 2028 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	4.40%	5%
Baseline | Unemployment | 2028 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	4.10%	4.30%
Baseline | HPI | 2024 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	(1.20%)	(3.30%)
Baseline | HPI | 2024 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.30%	5.40%
Baseline | HPI | 2025 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	1.60%	(5.10%)
Baseline | HPI | 2025 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3%	3.40%
Baseline | HPI | 2026 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3%	0.70%
Baseline | HPI | 2026 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.30%	3%
Baseline | HPI | 2027 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	4.40%	3.10%
Baseline | HPI | 2027 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.30%	3.30%
Baseline | HPI | 2028 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.20%	5.30%
Baseline | HPI | 2028 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.30%	3.30%
Baseline | Bank rate | 2024 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	5%	4.70%
Baseline | Bank rate | 2025 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	4.30%	4.90%
Baseline | Bank rate | 2026 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.80%	4.10%
Baseline | Bank rate | 2027 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.60%	3.80%
Baseline | Bank rate | 2028 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.50%	3.50%
Baseline | Federal funds rate | 2024 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	5.30%	5.10%
Baseline | Federal funds rate | 2025 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	4.40%	5%
Baseline | Federal funds rate | 2026 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	4%	3.90%
Baseline | Federal funds rate | 2027 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.80%	3.80%
Baseline | Federal funds rate | 2028 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.80%	3.80%
Downside 2
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	8.60%	10.80%
Downside 2 | GDP | 2024 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	0.20%	0.50%
Downside 2 | GDP | 2024 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	1.80%	2.40%
Downside 2 | GDP | 2025 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	(3.20%)	(1.50%)
Downside 2 | GDP | 2025 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	(2.90%)	(0.60%)
Downside 2 | GDP | 2026 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	0.50%	(2.60%)
Downside 2 | GDP | 2026 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	1.20%	(2.00%)
Downside 2 | GDP | 2027 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	2.10%	2.40%
Downside 2 | GDP | 2027 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	2.80%	3.10%
Downside 2 | GDP | 2028 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	1.30%	1.60%
Downside 2 | GDP | 2028 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	1.60%	2%
Downside 2 | Unemployment | 2024 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	4.40%	4.20%
Downside 2 | Unemployment | 2024 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	4.20%	3.70%
Downside 2 | Unemployment | 2025 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	6.40%	5.20%
Downside 2 | Unemployment | 2025 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	6.30%	5.20%
Downside 2 | Unemployment | 2026 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	6.90%	7.90%
Downside 2 | Unemployment | 2026 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	6.40%	7.20%
Downside 2 | Unemployment | 2027 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	5.30%	6.30%
Downside 2 | Unemployment | 2027 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	5.30%	5.90%
Downside 2 | Unemployment | 2028 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	4.70%	5.50%
Downside 2 | Unemployment | 2028 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	4.90%	5.20%
Downside 2 | HPI | 2024 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	(3.60%)	(3.30%)
Downside 2 | HPI | 2024 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	0.90%	5.40%
Downside 2 | HPI | 2025 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	(23.30%)	(19.30%)
Downside 2 | HPI | 2025 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	(10.70%)	(6.50%)
Downside 2 | HPI | 2026 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	2.80%	(16.80%)
Downside 2 | HPI | 2026 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	2%	(5.70%)
Downside 2 | HPI | 2027 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	15.60%	14.50%
Downside 2 | HPI | 2027 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	8%	7.20%
Downside 2 | HPI | 2028 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	7.70%	12.40%
Downside 2 | HPI | 2028 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	5.30%	6.40%
Downside 2 | Bank rate | 2024 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	5.90%	4.70%
Downside 2 | Bank rate | 2025 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	4%	6.60%
Downside 2 | Bank rate | 2026 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	1%	1.30%
Downside 2 | Bank rate | 2027 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	1%	1%
Downside 2 | Bank rate | 2028 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	1%	1%
Downside 2 | Federal funds rate | 2024 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	5.90%	5.10%
Downside 2 | Federal funds rate | 2025 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	4.10%	6.30%
Downside 2 | Federal funds rate | 2026 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	1.50%	1.80%
Downside 2 | Federal funds rate | 2027 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	1.50%	1.50%
Downside 2 | Federal funds rate | 2028 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	1.50%	1.50%
Downside 1
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	16.20%	18.30%
Downside 1 | GDP | 2024 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	0.40%	0.50%
Downside 1 | GDP | 2024 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	2%	2.40%
Downside 1 | GDP | 2025 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	(1.00%)	(0.60%)
Downside 1 | GDP | 2025 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	(0.60%)	0.30%
Downside 1 | GDP | 2026 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	1%	(0.70%)
Downside 1 | GDP | 2026 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	1.60%	(0.20%)
Downside 1 | GDP | 2027 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	1.90%	2%
Downside 1 | GDP | 2027 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	2.40%	2.50%
Downside 1 | GDP | 2028 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	1.50%	1.60%
Downside 1 | GDP | 2028 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	1.80%	1.90%
Downside 1 | Unemployment | 2024 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	4.30%	4.20%
Downside 1 | Unemployment | 2024 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	4.10%	3.70%
Downside 1 | Unemployment | 2025 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	5.40%	4.90%
Downside 1 | Unemployment | 2025 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	5.20%	4.70%
Downside 1 | Unemployment | 2026 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	5.60%	6.30%
Downside 1 | Unemployment | 2026 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	5.30%	5.80%
Downside 1 | Unemployment | 2027 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	4.90%	5.60%
Downside 1 | Unemployment | 2027 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	4.70%	5.10%
Downside 1 | Unemployment | 2028 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	4.60%	5.20%
Downside 1 | Unemployment | 2028 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	4.50%	4.80%
Downside 1 | HPI | 2024 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	(2.40%)	(3.30%)
Downside 1 | HPI | 2024 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	2.10%	5.40%
Downside 1 | HPI | 2025 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	(11.50%)	(12.40%)
Downside 1 | HPI | 2025 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	(4.00%)	(1.70%)
Downside 1 | HPI | 2026 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	2.90%	(8.30%)
Downside 1 | HPI | 2026 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	2.70%	(1.40%)
Downside 1 | HPI | 2027 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	9.90%	8.70%
Downside 1 | HPI | 2027 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	5.60%	5.20%
Downside 1 | HPI | 2028 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	5.50%	8.80%
Downside 1 | HPI | 2028 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	4.30%	4.80%
Downside 1 | Bank rate | 2024 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	5.50%	4.70%
Downside 1 | Bank rate | 2025 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	4.10%	5.80%
Downside 1 | Bank rate | 2026 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	2.40%	2.70%
Downside 1 | Bank rate | 2027 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	2.30%	2.50%
Downside 1 | Bank rate | 2028 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	2.30%	2.30%
Downside 1 | Federal funds rate | 2024 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	5.60%	5.10%
Downside 1 | Federal funds rate | 2025 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	4.30%	5.70%
Downside 1 | Federal funds rate | 2026 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	2.80%	2.90%
Downside 1 | Federal funds rate | 2027 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	2.60%	2.80%
Downside 1 | Federal funds rate | 2028 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	2.60%	2.80%
Upside 2
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	16.50%	13.80%
Upside 2 | GDP | 2024 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	1.10%	0.50%
Upside 2 | GDP | 2024 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	2.60%	2.40%
Upside 2 | GDP | 2025 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.90%	2.40%
Upside 2 | GDP | 2025 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.20%	2.80%
Upside 2 | GDP | 2026 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.20%	3.70%
Upside 2 | GDP | 2026 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	2.90%	3.10%
Upside 2 | GDP | 2027 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	2.60%	2.90%
Upside 2 | GDP | 2027 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	2.80%	2.80%
Upside 2 | GDP | 2028 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	2.30%	2.40%
Upside 2 | GDP | 2028 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	2.80%	2.80%
Upside 2 | Unemployment | 2024 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	4.10%	4.20%
Upside 2 | Unemployment | 2024 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.70%	3.70%
Upside 2 | Unemployment | 2025 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.40%	3.90%
Upside 2 | Unemployment | 2025 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.50%	3.50%
Upside 2 | Unemployment | 2026 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.40%	3.50%
Upside 2 | Unemployment | 2026 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.40%	3.60%
Upside 2 | Unemployment | 2027 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.30%	3.60%
Upside 2 | Unemployment | 2027 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.40%	3.60%
Upside 2 | Unemployment | 2028 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.20%	3.60%
Upside 2 | Unemployment | 2028 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.40%	3.60%
Upside 2 | HPI | 2024 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	4.90%	(3.30%)
Upside 2 | HPI | 2024 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	5.30%	5.40%
Upside 2 | HPI | 2025 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	14.20%	7.80%
Upside 2 | HPI | 2025 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.90%	6.10%
Upside 2 | HPI | 2026 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	6.80%	7.60%
Upside 2 | HPI | 2026 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	5%	4.30%
Upside 2 | HPI | 2027 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	2.70%	4.50%
Upside 2 | HPI | 2027 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	4.60%	4.50%
Upside 2 | HPI | 2028 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.80%	5.60%
Upside 2 | HPI | 2028 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	4.60%	4.60%
Upside 2 | Bank rate | 2024 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	4.90%	4.70%
Upside 2 | Bank rate | 2025 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.40%	4.30%
Upside 2 | Bank rate | 2026 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	2.60%	2.70%
Upside 2 | Bank rate | 2027 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	2.60%	2.50%
Upside 2 | Bank rate | 2028 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	2.50%	2.50%
Upside 2 | Federal funds rate | 2024 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	5.20%	5.10%
Upside 2 | Federal funds rate | 2025 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.70%	4.30%
Upside 2 | Federal funds rate | 2026 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.10%	2.90%
Upside 2 | Federal funds rate | 2027 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	2.80%	2.80%
Upside 2 | Federal funds rate | 2028 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	2.80%	2.80%
Upside 1
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	26.10%	24.70%
Upside 1 | GDP | 2024 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	0.90%	0.50%
Upside 1 | GDP | 2024 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	2.40%	2.40%
Upside 1 | GDP | 2025 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	2.50%	1.40%
Upside 1 | GDP | 2025 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	2.50%	2%
Upside 1 | GDP | 2026 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	2.40%	2.50%
Upside 1 | GDP | 2026 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	2.40%	2.40%
Upside 1 | GDP | 2027 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	2.20%	2.30%
Upside 1 | GDP | 2027 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	2.40%	2.40%
Upside 1 | GDP | 2028 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	2%	2%
Upside 1 | GDP | 2028 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	2.40%	2.40%
Upside 1 | Unemployment | 2024 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	4.20%	4.20%
Upside 1 | Unemployment | 2024 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.80%	3.70%
Upside 1 | Unemployment | 2025 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.90%	4.30%
Upside 1 | Unemployment | 2025 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.80%	3.90%
Upside 1 | Unemployment | 2026 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.90%	4.10%
Upside 1 | Unemployment | 2026 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.80%	3.90%
Upside 1 | Unemployment | 2027 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.90%	4.20%
Upside 1 | Unemployment | 2027 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.80%	4%
Upside 1 | Unemployment | 2028 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.80%	4.30%
Upside 1 | Unemployment | 2028 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.80%	4%
Upside 1 | HPI | 2024 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	1.80%	(3.30%)
Upside 1 | HPI | 2024 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	4.30%	5.40%
Upside 1 | HPI | 2025 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	7.80%	1.20%
Upside 1 | HPI | 2025 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.50%	4.70%
Upside 1 | HPI | 2026 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	4.90%	4.10%
Upside 1 | HPI | 2026 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	4.20%	3.70%
Upside 1 | HPI | 2027 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.60%	3.80%
Upside 1 | HPI | 2027 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.90%	3.90%
Upside 1 | HPI | 2028 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.50%	5.40%
Upside 1 | HPI | 2028 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.90%	3.90%
Upside 1 | Bank rate | 2024 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	5%	4.70%
Upside 1 | Bank rate | 2025 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.80%	4.60%
Upside 1 | Bank rate | 2026 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.20%	3.40%
Upside 1 | Bank rate | 2027 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.10%	3.30%
Upside 1 | Bank rate | 2028 | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3%	3%
Upside 1 | Federal funds rate | 2024 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	5.30%	5.10%
Upside 1 | Federal funds rate | 2025 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	4.10%	4.70%
Upside 1 | Federal funds rate | 2026 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.50%	3.50%
Upside 1 | Federal funds rate | 2027 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.30%	3.30%
Upside 1 | Federal funds rate | 2028 | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.30%	3.30%

Credit risk - Scenario probabil

Credit risk - Scenario probability weighting (Details)	Jun. 30, 2024	Dec. 31, 2023
Upside 2
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	16.50%	13.80%
Upside 1
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	26.10%	24.70%
Baseline
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	32.60%	32.40%
Downside 1
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	16.20%	18.30%
Downside 2
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	8.60%	10.80%

Credit risk - Macroeconomic v_2

Credit risk - Macroeconomic variables (specific bases and 5-year averages) (Details)	Jun. 30, 2024	Dec. 31, 2023
Upside 2
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	16.50%	13.80%
Upside 2 | GDP | Specific bases | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	15.10%	13.40%
Upside 2 | GDP | Specific bases | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	14.80%	15.10%
Upside 2 | GDP | 5-year averages | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	2.60%	2.40%
Upside 2 | GDP | 5-year averages | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	2.90%	2.80%
Upside 2 | Unemployment | Specific bases | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.10%	3.50%
Upside 2 | Unemployment | Specific bases | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.40%	3.40%
Upside 2 | Unemployment | 5-year averages | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.50%	3.70%
Upside 2 | Unemployment | 5-year averages | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.50%	3.60%
Upside 2 | HPI | Specific bases | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	36.50%	23.80%
Upside 2 | HPI | Specific bases | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	25.70%	27.40%
Upside 2 | HPI | 5-year averages | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	6.40%	4.40%
Upside 2 | HPI | 5-year averages | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	4.70%	5%
Upside 2 | Bank rate | Specific bases | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	2.50%	2.50%
Upside 2 | Bank rate | 5-year averages | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.20%	3.30%
Upside 2 | Federal funds rate | Specific bases | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	2.80%	2.80%
Upside 2 | Federal funds rate | 5-year averages | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.50%	3.60%
Upside 1
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	26.10%	24.70%
Upside 1 | GDP | Specific bases | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	11.50%	9.60%
Upside 1 | GDP | Specific bases | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	12.30%	12.30%
Upside 1 | GDP | 5-year averages | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	2%	1.70%
Upside 1 | GDP | 5-year averages | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	2.40%	2.30%
Upside 1 | Unemployment | Specific bases | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.80%	3.90%
Upside 1 | Unemployment | Specific bases | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.80%	3.50%
Upside 1 | Unemployment | 5-year averages | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.90%	4.20%
Upside 1 | Unemployment | 5-year averages | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.80%	3.90%
Upside 1 | HPI | Specific bases | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	23.40%	11.50%
Upside 1 | HPI | Specific bases | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	21.50%	23.50%
Upside 1 | HPI | 5-year averages | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	4.30%	2.20%
Upside 1 | HPI | 5-year averages | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	4%	4.30%
Upside 1 | Bank rate | Specific bases | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3%	3%
Upside 1 | Bank rate | 5-year averages | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.60%	3.80%
Upside 1 | Federal funds rate | Specific bases | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.30%	3.30%
Upside 1 | Federal funds rate | 5-year averages | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.90%	4%
Baseline
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	32.60%	32.40%
Baseline | GDP | Specific bases | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	1.40%	1.10%
Baseline | GDP | Specific bases | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	2%	1.80%
Baseline | GDP | 5-year averages | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	1.40%	1.10%
Baseline | GDP | 5-year averages | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	2%	1.80%
Baseline | Unemployment | Specific bases | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	4.40%	4.70%
Baseline | Unemployment | Specific bases | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	4.10%	4.20%
Baseline | Unemployment | 5-year averages | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	4.40%	4.70%
Baseline | Unemployment | 5-year averages | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	4.10%	4.20%
Baseline | HPI | Specific bases | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	2.20%	0.10%
Baseline | HPI | Specific bases | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.20%	3.70%
Baseline | HPI | 5-year averages | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	2.20%	0.10%
Baseline | HPI | 5-year averages | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.20%	3.70%
Baseline | Bank rate | Specific bases | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	4%	4.20%
Baseline | Bank rate | 5-year averages | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	4%	4.20%
Baseline | Federal funds rate | Specific bases | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	4.30%	4.30%
Baseline | Federal funds rate | 5-year averages | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	4.30%	4.30%
Downside 1
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	16.20%	18.30%
Downside 1 | GDP | Specific bases | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	(0.70%)	(1.30%)
Downside 1 | GDP | Specific bases | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	(0.20%)	0.60%
Downside 1 | GDP | 5-year averages | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	0.80%	0.60%
Downside 1 | GDP | 5-year averages | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	1.50%	1.40%
Downside 1 | Unemployment | Specific bases | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	6.20%	6.50%
Downside 1 | Unemployment | Specific bases | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	5.70%	5.90%
Downside 1 | Unemployment | 5-year averages | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	5%	5.20%
Downside 1 | Unemployment | 5-year averages | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	4.70%	4.80%
Downside 1 | HPI | Specific bases | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	(14.60%)	(22.50%)
Downside 1 | HPI | Specific bases | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	(2.00%)	0.40%
Downside 1 | HPI | 5-year averages | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	0.60%	(1.70%)
Downside 1 | HPI | 5-year averages | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	2.10%	2.40%
Downside 1 | Bank rate | Specific bases | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	6.50%	6.80%
Downside 1 | Bank rate | 5-year averages | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.30%	3.60%
Downside 1 | Federal funds rate | Specific bases | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	6.60%	6.80%
Downside 1 | Federal funds rate | 5-year averages | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	3.60%	3.90%
Downside 2
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	8.60%	10.80%
Downside 2 | GDP | Specific bases | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	(3.70%)	(4.10%)
Downside 2 | GDP | Specific bases | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	(3.30%)	(1.70%)
Downside 2 | GDP | 5-year averages | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	0.20%	0.10%
Downside 2 | GDP | 5-year averages | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	0.90%	0.90%
Downside 2 | Unemployment | Specific bases | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	8%	8.30%
Downside 2 | Unemployment | Specific bases | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	7.30%	7.50%
Downside 2 | Unemployment | 5-year averages | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	5.50%	5.80%
Downside 2 | Unemployment | 5-year averages | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	5.40%	5.40%
Downside 2 | HPI | Specific bases | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	(28.20%)	(35.00%)
Downside 2 | HPI | Specific bases | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	(10.60%)	(7.60%)
Downside 2 | HPI | 5-year averages | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	(1.10%)	(3.50%)
Downside 2 | HPI | 5-year averages | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	0.90%	1.20%
Downside 2 | Bank rate | Specific bases | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	8.50%	8.50%
Downside 2 | Bank rate | 5-year averages | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	2.60%	2.90%
Downside 2 | Federal funds rate | Specific bases | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	8.50%	8.50%
Downside 2 | Federal funds rate | 5-year averages | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Scenario probability weighting	2.90%	3.20%

Credit risk - Disclosure of man

Credit risk - Disclosure of management Value at Risk (Details) - GBP (£) £ in Millions	Jun. 30, 2024	Dec. 31, 2023	Jun. 30, 2023
Average
Disclosure of credit risk exposure [line items]
Value at risk	£ 29	£ 39	£ 45
Average | Credit risk
Disclosure of credit risk exposure [line items]
Value at risk	22	32	48
Average | Interest rate risk
Disclosure of credit risk exposure [line items]
Value at risk	16	15	16
Average | Equity risk
Disclosure of credit risk exposure [line items]
Value at risk	6	5	6
Average | Basis risk
Disclosure of credit risk exposure [line items]
Value at risk	6	10	15
Average | Spread risk
Disclosure of credit risk exposure [line items]
Value at risk	5	7	10
Average | Foreign exchange risk
Disclosure of credit risk exposure [line items]
Value at risk	4	4	3
Average | Commodity risk
Disclosure of credit risk exposure [line items]
Value at risk	0	0	0
Average | Inflation risk
Disclosure of credit risk exposure [line items]
Value at risk	4	4	9
Average | Diversification effect
Disclosure of credit risk exposure [line items]
Value at risk	(34)	(38)	(62)
High
Disclosure of credit risk exposure [line items]
Value at risk	36	55	60
High | Credit risk
Disclosure of credit risk exposure [line items]
Value at risk	27	40	57
High | Interest rate risk
Disclosure of credit risk exposure [line items]
Value at risk	25	24	25
High | Equity risk
Disclosure of credit risk exposure [line items]
Value at risk	9	9	10
High | Basis risk
Disclosure of credit risk exposure [line items]
Value at risk	8	13	24
High | Spread risk
Disclosure of credit risk exposure [line items]
Value at risk	7	10	14
High | Foreign exchange risk
Disclosure of credit risk exposure [line items]
Value at risk	9	9	6
High | Commodity risk
Disclosure of credit risk exposure [line items]
Value at risk	1	1	1
High | Inflation risk
Disclosure of credit risk exposure [line items]
Value at risk	5	6	11
Low
Disclosure of credit risk exposure [line items]
Value at risk	20	24	35
Low | Credit risk
Disclosure of credit risk exposure [line items]
Value at risk	19	22	38
Low | Interest rate risk
Disclosure of credit risk exposure [line items]
Value at risk	9	10	9
Low | Equity risk
Disclosure of credit risk exposure [line items]
Value at risk	4	3	3
Low | Basis risk
Disclosure of credit risk exposure [line items]
Value at risk	4	8	11
Low | Spread risk
Disclosure of credit risk exposure [line items]
Value at risk	4	6	7
Low | Foreign exchange risk
Disclosure of credit risk exposure [line items]
Value at risk	2	1	1
Low | Commodity risk
Disclosure of credit risk exposure [line items]
Value at risk	0	0	0
Low | Inflation risk
Disclosure of credit risk exposure [line items]
Value at risk	£ 2	£ 2	£ 6

Segmental reporting - Analysis

Segmental reporting - Analysis of results by business (Details) - GBP (£) £ in Millions		6 Months Ended
		Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Disclosure of operating segments [line items]
Net interest income		£ 3,115	£ 3,120
Non-interest income / (expense)		6,579	6,684
Total income		9,694	9,804
Operating costs		(6,065)	(5,952)
UK regulatory levies	[1]	(66)	0
Litigation and conduct		(56)	(34)
Operating expenses		(6,187)	(5,986)
Other net (expense)/income		1	2
Profit/(loss) before impairment		3,508	3,820
Credit impairment (charge)/release		(831)	(688)
Profit before tax		2,677	3,132
Total assets		1,283,964		£ 1,185,166
Total liabilities		1,224,854		1,124,662
Operating segments | Barclays UK Corporate Bank
Disclosure of operating segments [line items]
Net interest income		604	644
Non-interest income / (expense)		308	330
Total income		912	974
Operating costs		(492)	(457)
UK regulatory levies		(30)	0
Litigation and conduct		0	0
Operating expenses		(522)	(457)
Other net (expense)/income		0	2
Profit/(loss) before impairment		390	519
Credit impairment (charge)/release		(23)	60
Profit before tax		367	579
Total assets		64,000		61,600
Total liabilities		87,300		86,800
Operating segments | Barclays Private Bank and Wealth Management
Disclosure of operating segments [line items]
Net interest income		376	377
Non-interest income / (expense)		272	192
Total income		648	569
Operating costs		(454)	(340)
UK regulatory levies		(3)	0
Litigation and conduct		1	0
Operating expenses		(456)	(340)
Other net (expense)/income		0	0
Profit/(loss) before impairment		192	229
Credit impairment (charge)/release		3	(10)
Profit before tax		195	219
Total assets		35,800		32,100
Total liabilities		65,300		61,000
Operating segments | Barclays Investment Bank
Disclosure of operating segments [line items]
Net interest income		654	863
Non-interest income / (expense)		5,905	5,636
Total income		6,559	6,499
Operating costs		(3,963)	(3,956)
UK regulatory levies		(33)	0
Litigation and conduct		(11)	2
Operating expenses		(4,007)	(3,954)
Other net (expense)/income		0	0
Profit/(loss) before impairment		2,552	2,545
Credit impairment (charge)/release		(34)	(102)
Profit before tax		2,518	2,443
Total assets		1,121,900		1,027,600
Total liabilities		1,043,100		948,900
Operating segments | Barclays US Consumer Bank
Disclosure of operating segments [line items]
Net interest income		1,347	1,262
Non-interest income / (expense)		344	337
Total income		1,691	1,599
Operating costs		(807)	(837)
UK regulatory levies		0	0
Litigation and conduct		(4)	(4)
Operating expenses		(811)	(841)
Other net (expense)/income		0	1
Profit/(loss) before impairment		880	759
Credit impairment (charge)/release		(719)	(585)
Profit before tax		161	174
Total assets		32,000		33,400
Total liabilities		21,500		21,200
Head Office
Disclosure of operating segments [line items]
Net interest income		134	(26)
Non-interest income / (expense)		(250)	189
Total income		(116)	163
Operating costs		(349)	(362)
UK regulatory levies		0	0
Litigation and conduct		(42)	(32)
Operating expenses		(391)	(394)
Other net (expense)/income		1	(1)
Profit/(loss) before impairment		(506)	(232)
Credit impairment (charge)/release		(58)	(51)
Profit before tax		(564)	£ (283)
Total assets		30,300		30,500
Total liabilities		£ 7,700		£ 6,800
[1]Comprises the impact of the BoE levy scheme. Please refer to Financial Review, Other matters for details.

Segmental reporting - Split of

Segmental reporting - Split of income by geographic region (Details) - GBP (£) £ in Millions	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Disclosure of operating segments [line items]
Total income	£ 9,694	£ 9,804
United Kingdom
Disclosure of operating segments [line items]
Total income	3,185	3,555
Europe
Disclosure of operating segments [line items]
Total income	1,190	1,255
Americas
Disclosure of operating segments [line items]
Total income	4,617	4,234
Africa and Middle East
Disclosure of operating segments [line items]
Total income	39	42
Asia
Disclosure of operating segments [line items]
Total income	£ 663	£ 718

Net fee and commission income_2

Net fee and commission income (Details) - GBP (£) £ in Millions	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Disclosure of disaggregation of revenue from contracts with customers [line items]
Total revenue from contracts with customers	£ 4,706	£ 4,453
Other non-contract fee income	69	74
Fee and commission income	4,775	4,527
Fee and commission expense	(1,527)	(1,721)
Net fee and commission income	3,248	2,806
Transactional
Disclosure of disaggregation of revenue from contracts with customers [line items]
Total revenue from contracts with customers	1,895	1,825
Advisory
Disclosure of disaggregation of revenue from contracts with customers [line items]
Total revenue from contracts with customers	481	457
Brokerage and execution
Disclosure of disaggregation of revenue from contracts with customers [line items]
Total revenue from contracts with customers	839	1,042
Underwriting and syndication
Disclosure of disaggregation of revenue from contracts with customers [line items]
Total revenue from contracts with customers	1,437	1,036
Other
Disclosure of disaggregation of revenue from contracts with customers [line items]
Total revenue from contracts with customers	54	93
Operating segments | Barclays UK Corporate Bank
Disclosure of disaggregation of revenue from contracts with customers [line items]
Total revenue from contracts with customers	280	259
Other non-contract fee income	11	15
Fee and commission income	291	274
Fee and commission expense	(46)	(50)
Net fee and commission income	245	224
Operating segments | Barclays UK Corporate Bank | Transactional
Disclosure of disaggregation of revenue from contracts with customers [line items]
Total revenue from contracts with customers	228	212
Operating segments | Barclays UK Corporate Bank | Advisory
Disclosure of disaggregation of revenue from contracts with customers [line items]
Total revenue from contracts with customers	0	0
Operating segments | Barclays UK Corporate Bank | Brokerage and execution
Disclosure of disaggregation of revenue from contracts with customers [line items]
Total revenue from contracts with customers	0	0
Operating segments | Barclays UK Corporate Bank | Underwriting and syndication
Disclosure of disaggregation of revenue from contracts with customers [line items]
Total revenue from contracts with customers	46	39
Operating segments | Barclays UK Corporate Bank | Other
Disclosure of disaggregation of revenue from contracts with customers [line items]
Total revenue from contracts with customers	6	8
Operating segments | Barclays Private Bank and Wealth Management
Disclosure of disaggregation of revenue from contracts with customers [line items]
Total revenue from contracts with customers	236	153
Other non-contract fee income	0	3
Fee and commission income	236	156
Fee and commission expense	(19)	(15)
Net fee and commission income	217	141
Operating segments | Barclays Private Bank and Wealth Management | Transactional
Disclosure of disaggregation of revenue from contracts with customers [line items]
Total revenue from contracts with customers	16	13
Operating segments | Barclays Private Bank and Wealth Management | Advisory
Disclosure of disaggregation of revenue from contracts with customers [line items]
Total revenue from contracts with customers	156	94
Operating segments | Barclays Private Bank and Wealth Management | Brokerage and execution
Disclosure of disaggregation of revenue from contracts with customers [line items]
Total revenue from contracts with customers	62	44
Operating segments | Barclays Private Bank and Wealth Management | Underwriting and syndication
Disclosure of disaggregation of revenue from contracts with customers [line items]
Total revenue from contracts with customers	0	0
Operating segments | Barclays Private Bank and Wealth Management | Other
Disclosure of disaggregation of revenue from contracts with customers [line items]
Total revenue from contracts with customers	2	2
Operating segments | Barclays Investment Bank
Disclosure of disaggregation of revenue from contracts with customers [line items]
Total revenue from contracts with customers	2,699	2,561
Other non-contract fee income	58	56
Fee and commission income	2,757	2,617
Fee and commission expense	(520)	(742)
Net fee and commission income	2,237	1,875
Operating segments | Barclays Investment Bank | Transactional
Disclosure of disaggregation of revenue from contracts with customers [line items]
Total revenue from contracts with customers	171	160
Operating segments | Barclays Investment Bank | Advisory
Disclosure of disaggregation of revenue from contracts with customers [line items]
Total revenue from contracts with customers	325	363
Operating segments | Barclays Investment Bank | Brokerage and execution
Disclosure of disaggregation of revenue from contracts with customers [line items]
Total revenue from contracts with customers	777	998
Operating segments | Barclays Investment Bank | Underwriting and syndication
Disclosure of disaggregation of revenue from contracts with customers [line items]
Total revenue from contracts with customers	1,391	997
Operating segments | Barclays Investment Bank | Other
Disclosure of disaggregation of revenue from contracts with customers [line items]
Total revenue from contracts with customers	35	43
Operating segments | Barclays US Consumer Bank
Disclosure of disaggregation of revenue from contracts with customers [line items]
Total revenue from contracts with customers	1,320	1,295
Other non-contract fee income	0	0
Fee and commission income	1,320	1,295
Fee and commission expense	(893)	(870)
Net fee and commission income	427	425
Operating segments | Barclays US Consumer Bank | Transactional
Disclosure of disaggregation of revenue from contracts with customers [line items]
Total revenue from contracts with customers	1,320	1,290
Operating segments | Barclays US Consumer Bank | Advisory
Disclosure of disaggregation of revenue from contracts with customers [line items]
Total revenue from contracts with customers	0	0
Operating segments | Barclays US Consumer Bank | Brokerage and execution
Disclosure of disaggregation of revenue from contracts with customers [line items]
Total revenue from contracts with customers	0	0
Operating segments | Barclays US Consumer Bank | Underwriting and syndication
Disclosure of disaggregation of revenue from contracts with customers [line items]
Total revenue from contracts with customers	0	0
Operating segments | Barclays US Consumer Bank | Other
Disclosure of disaggregation of revenue from contracts with customers [line items]
Total revenue from contracts with customers	0	5
Head Office
Disclosure of disaggregation of revenue from contracts with customers [line items]
Total revenue from contracts with customers	171	185
Other non-contract fee income	0	0
Fee and commission income	171	185
Fee and commission expense	(49)	(44)
Net fee and commission income	122	141
Head Office | Transactional
Disclosure of disaggregation of revenue from contracts with customers [line items]
Total revenue from contracts with customers	160	150
Head Office | Advisory
Disclosure of disaggregation of revenue from contracts with customers [line items]
Total revenue from contracts with customers	0	0
Head Office | Brokerage and execution
Disclosure of disaggregation of revenue from contracts with customers [line items]
Total revenue from contracts with customers	0	0
Head Office | Underwriting and syndication
Disclosure of disaggregation of revenue from contracts with customers [line items]
Total revenue from contracts with customers	0	0
Head Office | Other
Disclosure of disaggregation of revenue from contracts with customers [line items]
Total revenue from contracts with customers	£ 11	£ 35

Dividends on ordinary shares _3

Dividends on ordinary shares and preference shares (Details) - GBP (£) £ in Millions	6 Months Ended
	Jun. 30, 2024	Dec. 31, 2023	Jun. 30, 2023
Dividends [Abstract]
Ordinary shares	£ 852	£ 648	£ 700
Preference shares	21	£ 21	19
Total	£ 873		£ 719

Fair value of financial instr_3

Fair value of financial instruments - Assets and liabilities held at fair value disaggregated by valuation technique (fair value hierarchy) and balance sheet classification (Details) - GBP (£) £ in Millions	Jun. 30, 2024	Dec. 31, 2023
Disclosure of detailed information about financial instruments [line items]
Trading portfolio assets	£ 197,281	£ 174,566
Financial assets at fair value through the income statement	213,305	204,236
Derivative financial instruments	252,244	256,111
Financial assets at fair value through other comprehensive income	54,022	51,423
Trading portfolio liabilities	(58,672)	(57,761)
Financial liabilities designated at fair value	(321,082)	(298,573)
Derivative financial instruments	(242,065)	(249,880)
At fair value
Disclosure of detailed information about financial instruments [line items]
Trading portfolio assets	197,281	174,566
Financial assets at fair value through the income statement	213,305	204,236
Derivative financial instruments	252,244	256,111
Financial assets at fair value through other comprehensive income	54,022	51,423
Investment property	1	2
Total assets	716,853	686,338
Trading portfolio liabilities	(58,672)	(57,761)
Financial liabilities designated at fair value	(321,082)	(298,573)
Derivative financial instruments	(242,065)	(249,880)
Total liabilities	(621,819)	(606,214)
Quoted market prices (Level 1) | At fair value
Disclosure of detailed information about financial instruments [line items]
Trading portfolio assets	98,942	94,615
Financial assets at fair value through the income statement	7,416	5,747
Derivative financial instruments	86	107
Financial assets at fair value through other comprehensive income	21,930	21,079
Investment property	0	0
Total assets	128,374	121,548
Trading portfolio liabilities	(32,666)	(28,380)
Financial liabilities designated at fair value	(182)	(117)
Derivative financial instruments	(66)	(81)
Total liabilities	(32,914)	(28,578)
Observable inputs (Level 2) | At fair value
Disclosure of detailed information about financial instruments [line items]
Trading portfolio assets	89,613	73,442
Financial assets at fair value through the income statement	198,865	193,121
Derivative financial instruments	249,337	252,464
Financial assets at fair value through other comprehensive income	29,692	29,568
Investment property	0	0
Total assets	567,507	548,595
Trading portfolio liabilities	(25,621)	(29,013)
Financial liabilities designated at fair value	(318,426)	(297,244)
Derivative financial instruments	(237,664)	(245,146)
Total liabilities	(581,711)	(571,403)
Significant unobservable inputs (Level 3)
Disclosure of detailed information about financial instruments [line items]
Total assets	20,972	16,195
Total liabilities	(7,194)	(6,233)
Significant unobservable inputs (Level 3) | At fair value
Disclosure of detailed information about financial instruments [line items]
Trading portfolio assets	8,726	6,509
Financial assets at fair value through the income statement	7,024	5,368
Derivative financial instruments	2,821	3,540
Financial assets at fair value through other comprehensive income	2,400	776
Investment property	1	2
Total assets	20,972	16,195
Trading portfolio liabilities	(385)	(368)
Financial liabilities designated at fair value	(2,474)	(1,212)
Derivative financial instruments	(4,335)	(4,653)
Total liabilities	£ (7,194)	£ (6,233)

Fair value of financial instr_4

Fair value of financial instruments - Level 3 assets and liabilities held at fair value disaggregated by product type (Details) - Significant unobservable inputs (Level 3) - GBP (£) £ in Millions	Jun. 30, 2024	Dec. 31, 2023
Disclosure of detailed information about financial instruments [line items]
Assets	£ 20,972	£ 16,195
Liabilities	(7,194)	(6,233)
Corporate debt
Disclosure of detailed information about financial instruments [line items]
Assets	2,211	1,568
Liabilities	(353)	(352)
Reverse repurchase and repurchase agreements
Disclosure of detailed information about financial instruments [line items]
Assets	620	209
Liabilities	(934)	(517)
Loans
Disclosure of detailed information about financial instruments [line items]
Assets	11,404	8,986
Liabilities	0	0
Private equity investments
Disclosure of detailed information about financial instruments [line items]
Assets	183	145
Liabilities	0	0
Asset backed securities
Disclosure of detailed information about financial instruments [line items]
Assets	2,145	605
Liabilities	(2)	0
Issued debt
Disclosure of detailed information about financial instruments [line items]
Assets	0	0
Liabilities	(1,539)	(637)
Other
Disclosure of detailed information about financial instruments [line items]
Assets	1,588	1,142
Liabilities	(31)	(74)
Interest rate derivatives
Disclosure of detailed information about financial instruments [line items]
Assets	1,622	2,211
Liabilities	(1,538)	(1,701)
Foreign exchange derivatives
Disclosure of detailed information about financial instruments [line items]
Assets	175	111
Liabilities	(118)	(91)
Credit derivatives
Disclosure of detailed information about financial instruments [line items]
Assets	216	241
Liabilities	(798)	(820)
Equity derivatives
Disclosure of detailed information about financial instruments [line items]
Assets	808	977
Liabilities	£ (1,881)	£ (2,041)

Fair value of financial instr_5

Fair value of financial instruments - Analysis of movements in Level 3 assets and liabilities (Details) - GBP (£) £ in Millions	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Net assets (liabilities) [abstract]
Derivative financial assets	£ 252,244		£ 256,111
Derivative financial liabilities	(242,065)		£ (249,880)
Significant unobservable inputs (Level 3)
Financial assets
Beginning balance, financial assets	16,195
Ending balance, financial assets	20,972
Financial liabilities
Beginning balance, financial liabilities	(6,233)
Ending balance, financial liabilities	(7,194)
Recurring fair value measurement | Significant unobservable inputs (Level 3)
Net assets (liabilities) [abstract]
Beginning balance, assets (liabilities), net	9,962	£ 10,312
Purchases, fair value measurement, assets (liabilities), net	7,491	3,882
Sales, fair value measurement, assets (liabilities), net	(1,997)	(2,822)
Issues, fair value measurement, assets (liabilities), net	(647)	(226)
Settlements, fair value measurement, assets (liabilities), net	(1,151)	(1,088)
Total gains (losses) recognised in OCI, assets (liabilities), net	0	0
Transfers into Level 3 of fair value hierarchy, assets (liabilities), net	446	1,325
Transfers out of Level 3 of fair value hierarchy, assets (liabilities), net	(157)	104
Ending balance, assets (liabilities), net	13,778	11,141
Derivative financial assets	2,821	4,532
Derivative financial liabilities	(4,335)	(5,269)
Recurring fair value measurement | Significant unobservable inputs (Level 3) | Net assets (liabilities) at fair value through profit or loss, category trading income
Net assets (liabilities) [abstract]
Total gains (losses) in the period recognised in the income statement, assets (liabilities), net	(214)	(295)
Recurring fair value measurement | Significant unobservable inputs (Level 3) | Net assets (liabilities) at fair value through profit or loss, category other income
Net assets (liabilities) [abstract]
Total gains (losses) in the period recognised in the income statement, assets (liabilities), net	45	(51)
Recurring fair value measurement | Investment property | Significant unobservable inputs (Level 3)
Financial assets
Beginning balance, financial assets	2	5
Purchases, fair value measurement, assets	0	0
Sales, fair value measurement, assets	(1)	0
Issues, fair value measurement, assets	0	0
Settlements, fair value measurement, assets	0	0
Total gains (losses) recognised in OCI, assets	0	0
Transfers into Level 3 of fair value hierarchy, assets	0	0
Transfers out of Level 3 of fair value hierarchy, assets	0	0
Ending balance, financial assets	1	2
Recurring fair value measurement | Investment property | Significant unobservable inputs (Level 3) | Financial assets at fair value through profit or loss, category trading
Financial assets
Total gains and (losses) in the period recognised in the income statement, assets	0	0
Recurring fair value measurement | Investment property | Significant unobservable inputs (Level 3) | Financial assets at fair value through profit or loss, category other income
Financial assets
Total gains and (losses) in the period recognised in the income statement, assets	0	(3)
Recurring fair value measurement | Net derivative financial instruments | Significant unobservable inputs (Level 3)
Net assets (liabilities) [abstract]
Beginning balance, assets (liabilities), net	(1,113)	(1,190)
Purchases, fair value measurement, assets (liabilities), net	(181)	(281)
Sales, fair value measurement, assets (liabilities), net	33	5
Issues, fair value measurement, assets (liabilities), net	(19)	0
Settlements, fair value measurement, assets (liabilities), net	(171)	(47)
Total gains (losses) recognised in OCI, assets (liabilities), net	0	0
Transfers into Level 3 of fair value hierarchy, assets (liabilities), net	21	505
Transfers out of Level 3 of fair value hierarchy, assets (liabilities), net	109	459
Ending balance, assets (liabilities), net	(1,514)	(737)
Recurring fair value measurement | Net derivative financial instruments | Significant unobservable inputs (Level 3) | Net assets (liabilities) at fair value through profit or loss, category trading income
Net assets (liabilities) [abstract]
Total gains (losses) in the period recognised in the income statement, assets (liabilities), net	(193)	(188)
Recurring fair value measurement | Net derivative financial instruments | Significant unobservable inputs (Level 3) | Net assets (liabilities) at fair value through profit or loss, category other income
Net assets (liabilities) [abstract]
Total gains (losses) in the period recognised in the income statement, assets (liabilities), net	0	0
Trading portfolio liabilities | Recurring fair value measurement | Significant unobservable inputs (Level 3)
Financial liabilities
Beginning balance, financial liabilities	(368)	(56)
Purchases, fair value measurement, liabilities	(28)	(16)
Sales, fair value measurement, liabilities	17	4
Issues, fair value measurement, liabilities	0	0
Settlements, fair value measurement, liabilities	0	0
Total gains (losses) recognised in OCI, liabilities	0	0
Transfers into Level 3 of fair value hierarchy, liabilities	(30)	(8)
Transfers out of Level 3 of fair value hierarchy, liabilities	6	9
Ending balance, financial liabilities	(385)	(52)
Trading portfolio liabilities | Recurring fair value measurement | Significant unobservable inputs (Level 3) | Financial liabilities at fair value through profit or loss, category trading
Financial liabilities
Total gains (losses) in the period recognised in the income statement, liabilities	18	15
Trading portfolio liabilities | Recurring fair value measurement | Significant unobservable inputs (Level 3) | Financial liabilities at fair value through profit or loss, category other income
Financial liabilities
Total gains (losses) in the period recognised in the income statement, liabilities	0	0
Financial liabilities designated at fair value | Recurring fair value measurement | Significant unobservable inputs (Level 3)
Financial liabilities
Beginning balance, financial liabilities	(1,212)	(1,042)
Purchases, fair value measurement, liabilities	1	0
Sales, fair value measurement, liabilities	9	0
Issues, fair value measurement, liabilities	(628)	(226)
Settlements, fair value measurement, liabilities	16	0
Total gains (losses) recognised in OCI, liabilities	0	0
Transfers into Level 3 of fair value hierarchy, liabilities	(881)	(290)
Transfers out of Level 3 of fair value hierarchy, liabilities	248	463
Ending balance, financial liabilities	(2,474)	(1,092)
Financial liabilities designated at fair value | Recurring fair value measurement | Significant unobservable inputs (Level 3) | Financial liabilities at fair value through profit or loss, category trading
Financial liabilities
Total gains (losses) in the period recognised in the income statement, liabilities	(27)	4
Financial liabilities designated at fair value | Recurring fair value measurement | Significant unobservable inputs (Level 3) | Financial liabilities at fair value through profit or loss, category other income
Financial liabilities
Total gains (losses) in the period recognised in the income statement, liabilities	0	(1)
Interest rate derivatives | Significant unobservable inputs (Level 3)
Financial assets
Beginning balance, financial assets	2,211
Ending balance, financial assets	1,622
Financial liabilities
Beginning balance, financial liabilities	(1,701)
Ending balance, financial liabilities	(1,538)
Interest rate derivatives | Recurring fair value measurement | Net derivative financial instruments | Significant unobservable inputs (Level 3)
Net assets (liabilities) [abstract]
Beginning balance, assets (liabilities), net	510	(497)
Purchases, fair value measurement, assets (liabilities), net	10	0
Sales, fair value measurement, assets (liabilities), net	0	0
Issues, fair value measurement, assets (liabilities), net	0	0
Settlements, fair value measurement, assets (liabilities), net	(136)	19
Total gains (losses) recognised in OCI, assets (liabilities), net	0	0
Transfers into Level 3 of fair value hierarchy, assets (liabilities), net	31	544
Transfers out of Level 3 of fair value hierarchy, assets (liabilities), net	(173)	446
Ending balance, assets (liabilities), net	84	477
Interest rate derivatives | Recurring fair value measurement | Net derivative financial instruments | Significant unobservable inputs (Level 3) | Net assets (liabilities) at fair value through profit or loss, category trading income
Net assets (liabilities) [abstract]
Total gains (losses) in the period recognised in the income statement, assets (liabilities), net	(158)	(35)
Interest rate derivatives | Recurring fair value measurement | Net derivative financial instruments | Significant unobservable inputs (Level 3) | Net assets (liabilities) at fair value through profit or loss, category other income
Net assets (liabilities) [abstract]
Total gains (losses) in the period recognised in the income statement, assets (liabilities), net	0	0
Foreign exchange derivatives | Significant unobservable inputs (Level 3)
Financial assets
Beginning balance, financial assets	111
Ending balance, financial assets	175
Financial liabilities
Beginning balance, financial liabilities	(91)
Ending balance, financial liabilities	(118)
Foreign exchange derivatives | Recurring fair value measurement | Net derivative financial instruments | Significant unobservable inputs (Level 3)
Net assets (liabilities) [abstract]
Beginning balance, assets (liabilities), net	20	39
Purchases, fair value measurement, assets (liabilities), net	(1)	0
Sales, fair value measurement, assets (liabilities), net	0	0
Issues, fair value measurement, assets (liabilities), net	0	0
Settlements, fair value measurement, assets (liabilities), net	18	0
Total gains (losses) recognised in OCI, assets (liabilities), net	0	0
Transfers into Level 3 of fair value hierarchy, assets (liabilities), net	21	13
Transfers out of Level 3 of fair value hierarchy, assets (liabilities), net	(7)	(15)
Ending balance, assets (liabilities), net	57	6
Foreign exchange derivatives | Recurring fair value measurement | Net derivative financial instruments | Significant unobservable inputs (Level 3) | Net assets (liabilities) at fair value through profit or loss, category trading income
Net assets (liabilities) [abstract]
Total gains (losses) in the period recognised in the income statement, assets (liabilities), net	6	(31)
Foreign exchange derivatives | Recurring fair value measurement | Net derivative financial instruments | Significant unobservable inputs (Level 3) | Net assets (liabilities) at fair value through profit or loss, category other income
Net assets (liabilities) [abstract]
Total gains (losses) in the period recognised in the income statement, assets (liabilities), net	0	0
Credit derivatives | Significant unobservable inputs (Level 3)
Financial assets
Beginning balance, financial assets	241
Ending balance, financial assets	216
Financial liabilities
Beginning balance, financial liabilities	(820)
Ending balance, financial liabilities	(798)
Credit derivatives | Recurring fair value measurement | Net derivative financial instruments | Significant unobservable inputs (Level 3)
Net assets (liabilities) [abstract]
Beginning balance, assets (liabilities), net	(579)	(313)
Purchases, fair value measurement, assets (liabilities), net	5	(191)
Sales, fair value measurement, assets (liabilities), net	33	5
Issues, fair value measurement, assets (liabilities), net	0	0
Settlements, fair value measurement, assets (liabilities), net	0	66
Total gains (losses) recognised in OCI, assets (liabilities), net	0	0
Transfers into Level 3 of fair value hierarchy, assets (liabilities), net	(22)	52
Transfers out of Level 3 of fair value hierarchy, assets (liabilities), net	3	16
Ending balance, assets (liabilities), net	(582)	(352)
Credit derivatives | Recurring fair value measurement | Net derivative financial instruments | Significant unobservable inputs (Level 3) | Net assets (liabilities) at fair value through profit or loss, category trading income
Net assets (liabilities) [abstract]
Total gains (losses) in the period recognised in the income statement, assets (liabilities), net	(22)	13
Credit derivatives | Recurring fair value measurement | Net derivative financial instruments | Significant unobservable inputs (Level 3) | Net assets (liabilities) at fair value through profit or loss, category other income
Net assets (liabilities) [abstract]
Total gains (losses) in the period recognised in the income statement, assets (liabilities), net	0	0
Equity derivatives | Significant unobservable inputs (Level 3)
Financial assets
Beginning balance, financial assets	977
Ending balance, financial assets	808
Financial liabilities
Beginning balance, financial liabilities	(2,041)
Ending balance, financial liabilities	(1,881)
Equity derivatives | Recurring fair value measurement | Net derivative financial instruments | Significant unobservable inputs (Level 3)
Net assets (liabilities) [abstract]
Beginning balance, assets (liabilities), net	(1,064)	(419)
Purchases, fair value measurement, assets (liabilities), net	(195)	(90)
Sales, fair value measurement, assets (liabilities), net	0	0
Issues, fair value measurement, assets (liabilities), net	(19)	0
Settlements, fair value measurement, assets (liabilities), net	(53)	(132)
Total gains (losses) recognised in OCI, assets (liabilities), net	0	0
Transfers into Level 3 of fair value hierarchy, assets (liabilities), net	(9)	(104)
Transfers out of Level 3 of fair value hierarchy, assets (liabilities), net	286	12
Ending balance, assets (liabilities), net	(1,073)	(868)
Equity derivatives | Recurring fair value measurement | Net derivative financial instruments | Significant unobservable inputs (Level 3) | Net assets (liabilities) at fair value through profit or loss, category trading income
Net assets (liabilities) [abstract]
Total gains (losses) in the period recognised in the income statement, assets (liabilities), net	(19)	(135)
Equity derivatives | Recurring fair value measurement | Net derivative financial instruments | Significant unobservable inputs (Level 3) | Net assets (liabilities) at fair value through profit or loss, category other income
Net assets (liabilities) [abstract]
Total gains (losses) in the period recognised in the income statement, assets (liabilities), net	0	0
Corporate debt | Significant unobservable inputs (Level 3)
Financial assets
Beginning balance, financial assets	1,568
Ending balance, financial assets	2,211
Financial liabilities
Beginning balance, financial liabilities	(352)
Ending balance, financial liabilities	(353)
Loans | Significant unobservable inputs (Level 3)
Financial assets
Beginning balance, financial assets	8,986
Ending balance, financial assets	11,404
Financial liabilities
Beginning balance, financial liabilities	0
Ending balance, financial liabilities	0
Private equity investments | Significant unobservable inputs (Level 3)
Financial assets
Beginning balance, financial assets	145
Ending balance, financial assets	183
Financial liabilities
Beginning balance, financial liabilities	0
Ending balance, financial liabilities	0
Reverse repurchase and repurchase agreements | Significant unobservable inputs (Level 3)
Financial assets
Beginning balance, financial assets	209
Ending balance, financial assets	620
Financial liabilities
Beginning balance, financial liabilities	(517)
Ending balance, financial liabilities	(934)
Asset backed securities | Significant unobservable inputs (Level 3)
Financial assets
Beginning balance, financial assets	605
Ending balance, financial assets	2,145
Financial liabilities
Beginning balance, financial liabilities	0
Ending balance, financial liabilities	(2)
Other | Significant unobservable inputs (Level 3)
Financial assets
Beginning balance, financial assets	1,142
Ending balance, financial assets	1,588
Financial liabilities
Beginning balance, financial liabilities	(74)
Ending balance, financial liabilities	(31)
Trading portfolio assets | Recurring fair value measurement | Significant unobservable inputs (Level 3)
Financial assets
Beginning balance, financial assets	6,509	6,480
Purchases, fair value measurement, assets	3,113	2,285
Sales, fair value measurement, assets	(1,007)	(1,876)
Issues, fair value measurement, assets	0	0
Settlements, fair value measurement, assets	(714)	(402)
Total gains (losses) recognised in OCI, assets	0	0
Transfers into Level 3 of fair value hierarchy, assets	1,046	1,022
Transfers out of Level 3 of fair value hierarchy, assets	(214)	(676)
Ending balance, financial assets	8,726	6,799
Trading portfolio assets | Recurring fair value measurement | Significant unobservable inputs (Level 3) | Financial assets at fair value through profit or loss, category trading
Financial assets
Total gains and (losses) in the period recognised in the income statement, assets	(7)	(34)
Trading portfolio assets | Recurring fair value measurement | Significant unobservable inputs (Level 3) | Financial assets at fair value through profit or loss, category other income
Financial assets
Total gains and (losses) in the period recognised in the income statement, assets	0	0
Trading portfolio assets | Corporate debt | Recurring fair value measurement | Significant unobservable inputs (Level 3)
Financial assets
Beginning balance, financial assets	679	595
Purchases, fair value measurement, assets	833	338
Sales, fair value measurement, assets	(225)	(118)
Issues, fair value measurement, assets	0	0
Settlements, fair value measurement, assets	(49)	(53)
Total gains (losses) recognised in OCI, assets	0	0
Transfers into Level 3 of fair value hierarchy, assets	144	36
Transfers out of Level 3 of fair value hierarchy, assets	(21)	(29)
Ending balance, financial assets	1,305	774
Trading portfolio assets | Corporate debt | Recurring fair value measurement | Significant unobservable inputs (Level 3) | Financial assets at fair value through profit or loss, category trading
Financial assets
Total gains and (losses) in the period recognised in the income statement, assets	(56)	5
Trading portfolio assets | Corporate debt | Recurring fair value measurement | Significant unobservable inputs (Level 3) | Financial assets at fair value through profit or loss, category other income
Financial assets
Total gains and (losses) in the period recognised in the income statement, assets	0	0
Trading portfolio assets | Loans | Recurring fair value measurement | Significant unobservable inputs (Level 3)
Financial assets
Beginning balance, financial assets	4,469	4,837
Purchases, fair value measurement, assets	1,478	919
Sales, fair value measurement, assets	(247)	(1,152)
Issues, fair value measurement, assets	0	0
Settlements, fair value measurement, assets	(661)	(311)
Total gains (losses) recognised in OCI, assets	0	0
Transfers into Level 3 of fair value hierarchy, assets	139	556
Transfers out of Level 3 of fair value hierarchy, assets	(10)	(334)
Ending balance, financial assets	5,210	4,519
Trading portfolio assets | Loans | Recurring fair value measurement | Significant unobservable inputs (Level 3) | Financial assets at fair value through profit or loss, category trading
Financial assets
Total gains and (losses) in the period recognised in the income statement, assets	42	4
Trading portfolio assets | Loans | Recurring fair value measurement | Significant unobservable inputs (Level 3) | Financial assets at fair value through profit or loss, category other income
Financial assets
Total gains and (losses) in the period recognised in the income statement, assets	0	0
Trading portfolio assets | Asset backed securities | Recurring fair value measurement | Significant unobservable inputs (Level 3)
Financial assets
Beginning balance, financial assets	318	175
Purchases, fair value measurement, assets	39	324
Sales, fair value measurement, assets	(196)	(278)
Issues, fair value measurement, assets	0	0
Settlements, fair value measurement, assets	0	0
Total gains (losses) recognised in OCI, assets	0	0
Transfers into Level 3 of fair value hierarchy, assets	611	288
Transfers out of Level 3 of fair value hierarchy, assets	(65)	(60)
Ending balance, financial assets	730	438
Trading portfolio assets | Asset backed securities | Recurring fair value measurement | Significant unobservable inputs (Level 3) | Financial assets at fair value through profit or loss, category trading
Financial assets
Total gains and (losses) in the period recognised in the income statement, assets	23	(11)
Trading portfolio assets | Asset backed securities | Recurring fair value measurement | Significant unobservable inputs (Level 3) | Financial assets at fair value through profit or loss, category other income
Financial assets
Total gains and (losses) in the period recognised in the income statement, assets	0	0
Trading portfolio assets | Other | Recurring fair value measurement | Significant unobservable inputs (Level 3)
Financial assets
Beginning balance, financial assets	1,043	873
Purchases, fair value measurement, assets	763	704
Sales, fair value measurement, assets	(339)	(328)
Issues, fair value measurement, assets	0	0
Settlements, fair value measurement, assets	(4)	(38)
Total gains (losses) recognised in OCI, assets	0	0
Transfers into Level 3 of fair value hierarchy, assets	152	142
Transfers out of Level 3 of fair value hierarchy, assets	(118)	(253)
Ending balance, financial assets	1,481	1,068
Trading portfolio assets | Other | Recurring fair value measurement | Significant unobservable inputs (Level 3) | Financial assets at fair value through profit or loss, category trading
Financial assets
Total gains and (losses) in the period recognised in the income statement, assets	(16)	(32)
Trading portfolio assets | Other | Recurring fair value measurement | Significant unobservable inputs (Level 3) | Financial assets at fair value through profit or loss, category other income
Financial assets
Total gains and (losses) in the period recognised in the income statement, assets	0	0
Financial assets at fair value through the income statement | Recurring fair value measurement | Significant unobservable inputs (Level 3)
Financial assets
Beginning balance, financial assets	5,368	6,111
Purchases, fair value measurement, assets	2,732	1,847
Sales, fair value measurement, assets	(1,006)	(955)
Issues, fair value measurement, assets	0	0
Settlements, fair value measurement, assets	(282)	(638)
Total gains (losses) recognised in OCI, assets	0	0
Transfers into Level 3 of fair value hierarchy, assets	290	96
Transfers out of Level 3 of fair value hierarchy, assets	(106)	(151)
Ending balance, financial assets	7,024	6,171
Financial assets at fair value through the income statement | Recurring fair value measurement | Significant unobservable inputs (Level 3) | Financial assets at fair value through profit or loss, category trading
Financial assets
Total gains and (losses) in the period recognised in the income statement, assets	(6)	(92)
Financial assets at fair value through the income statement | Recurring fair value measurement | Significant unobservable inputs (Level 3) | Financial assets at fair value through profit or loss, category other income
Financial assets
Total gains and (losses) in the period recognised in the income statement, assets	34	(47)
Financial assets at fair value through the income statement | Corporate debt | Recurring fair value measurement | Significant unobservable inputs (Level 3)
Financial assets
Beginning balance, financial assets	889	1,079
Purchases, fair value measurement, assets	0	0
Sales, fair value measurement, assets	(3)	(120)
Issues, fair value measurement, assets	0	0
Settlements, fair value measurement, assets	0	0
Total gains (losses) recognised in OCI, assets	0	0
Transfers into Level 3 of fair value hierarchy, assets	0	0
Transfers out of Level 3 of fair value hierarchy, assets	0	0
Ending balance, financial assets	906	936
Financial assets at fair value through the income statement | Corporate debt | Recurring fair value measurement | Significant unobservable inputs (Level 3) | Financial assets at fair value through profit or loss, category trading
Financial assets
Total gains and (losses) in the period recognised in the income statement, assets	13	(20)
Financial assets at fair value through the income statement | Corporate debt | Recurring fair value measurement | Significant unobservable inputs (Level 3) | Financial assets at fair value through profit or loss, category other income
Financial assets
Total gains and (losses) in the period recognised in the income statement, assets	7	(3)
Financial assets at fair value through the income statement | Loans | Recurring fair value measurement | Significant unobservable inputs (Level 3)
Financial assets
Beginning balance, financial assets	3,984	4,553
Purchases, fair value measurement, assets	1,760	1,839
Sales, fair value measurement, assets	(1,000)	(823)
Issues, fair value measurement, assets	0	0
Settlements, fair value measurement, assets	(266)	(613)
Total gains (losses) recognised in OCI, assets	0	0
Transfers into Level 3 of fair value hierarchy, assets	138	28
Transfers out of Level 3 of fair value hierarchy, assets	(61)	(106)
Ending balance, financial assets	4,552	4,792
Financial assets at fair value through the income statement | Loans | Recurring fair value measurement | Significant unobservable inputs (Level 3) | Financial assets at fair value through profit or loss, category trading
Financial assets
Total gains and (losses) in the period recognised in the income statement, assets	(21)	(44)
Financial assets at fair value through the income statement | Loans | Recurring fair value measurement | Significant unobservable inputs (Level 3) | Financial assets at fair value through profit or loss, category other income
Financial assets
Total gains and (losses) in the period recognised in the income statement, assets	18	(42)
Financial assets at fair value through the income statement | Private equity investments | Recurring fair value measurement | Significant unobservable inputs (Level 3)
Financial assets
Beginning balance, financial assets	145	140
Purchases, fair value measurement, assets	37	0
Sales, fair value measurement, assets	(2)	0
Issues, fair value measurement, assets	0	0
Settlements, fair value measurement, assets	(4)	(5)
Total gains (losses) recognised in OCI, assets	0	0
Transfers into Level 3 of fair value hierarchy, assets	0	0
Transfers out of Level 3 of fair value hierarchy, assets	0	0
Ending balance, financial assets	183	138
Financial assets at fair value through the income statement | Private equity investments | Recurring fair value measurement | Significant unobservable inputs (Level 3) | Financial assets at fair value through profit or loss, category trading
Financial assets
Total gains and (losses) in the period recognised in the income statement, assets	2	(5)
Financial assets at fair value through the income statement | Private equity investments | Recurring fair value measurement | Significant unobservable inputs (Level 3) | Financial assets at fair value through profit or loss, category other income
Financial assets
Total gains and (losses) in the period recognised in the income statement, assets	5	8
Financial assets at fair value through the income statement | Reverse repurchase and repurchase agreements | Recurring fair value measurement | Significant unobservable inputs (Level 3)
Financial assets
Beginning balance, financial assets	209	38
Purchases, fair value measurement, assets	297	0
Sales, fair value measurement, assets	0	0
Issues, fair value measurement, assets	0	0
Settlements, fair value measurement, assets	0	0
Total gains (losses) recognised in OCI, assets	0	0
Transfers into Level 3 of fair value hierarchy, assets	141	46
Transfers out of Level 3 of fair value hierarchy, assets	(27)	(29)
Ending balance, financial assets	620	44
Financial assets at fair value through the income statement | Reverse repurchase and repurchase agreements | Recurring fair value measurement | Significant unobservable inputs (Level 3) | Financial assets at fair value through profit or loss, category trading
Financial assets
Total gains and (losses) in the period recognised in the income statement, assets	0	(11)
Financial assets at fair value through the income statement | Reverse repurchase and repurchase agreements | Recurring fair value measurement | Significant unobservable inputs (Level 3) | Financial assets at fair value through profit or loss, category other income
Financial assets
Total gains and (losses) in the period recognised in the income statement, assets	0	0
Financial assets at fair value through the income statement | Asset backed securities | Recurring fair value measurement | Significant unobservable inputs (Level 3)
Financial assets
Beginning balance, financial assets	85	192
Purchases, fair value measurement, assets	590	8
Sales, fair value measurement, assets	(1)	(2)
Issues, fair value measurement, assets	0	0
Settlements, fair value measurement, assets	(12)	0
Total gains (losses) recognised in OCI, assets	0	0
Transfers into Level 3 of fair value hierarchy, assets	9	21
Transfers out of Level 3 of fair value hierarchy, assets	(14)	(16)
Ending balance, financial assets	658	190
Financial assets at fair value through the income statement | Asset backed securities | Recurring fair value measurement | Significant unobservable inputs (Level 3) | Financial assets at fair value through profit or loss, category trading
Financial assets
Total gains and (losses) in the period recognised in the income statement, assets	1	(13)
Financial assets at fair value through the income statement | Asset backed securities | Recurring fair value measurement | Significant unobservable inputs (Level 3) | Financial assets at fair value through profit or loss, category other income
Financial assets
Total gains and (losses) in the period recognised in the income statement, assets	0	0
Financial assets at fair value through the income statement | Other | Recurring fair value measurement | Significant unobservable inputs (Level 3)
Financial assets
Beginning balance, financial assets	56	109
Purchases, fair value measurement, assets	48	0
Sales, fair value measurement, assets	0	(10)
Issues, fair value measurement, assets	0	0
Settlements, fair value measurement, assets	0	(20)
Total gains (losses) recognised in OCI, assets	0	0
Transfers into Level 3 of fair value hierarchy, assets	2	1
Transfers out of Level 3 of fair value hierarchy, assets	(4)	0
Ending balance, financial assets	105	71
Financial assets at fair value through the income statement | Other | Recurring fair value measurement | Significant unobservable inputs (Level 3) | Financial assets at fair value through profit or loss, category trading
Financial assets
Total gains and (losses) in the period recognised in the income statement, assets	(1)	1
Financial assets at fair value through the income statement | Other | Recurring fair value measurement | Significant unobservable inputs (Level 3) | Financial assets at fair value through profit or loss, category other income
Financial assets
Total gains and (losses) in the period recognised in the income statement, assets	4	(10)
Financial assets at fair value through other comprehensive income | Recurring fair value measurement | Significant unobservable inputs (Level 3)
Financial assets
Beginning balance, financial assets	776	4
Purchases, fair value measurement, assets	1,854	47
Sales, fair value measurement, assets	(42)	0
Issues, fair value measurement, assets	0	0
Settlements, fair value measurement, assets	0	(1)
Total gains (losses) recognised in OCI, assets	0	0
Transfers into Level 3 of fair value hierarchy, assets	0	0
Transfers out of Level 3 of fair value hierarchy, assets	(200)	0
Ending balance, financial assets	2,400	50
Financial assets at fair value through other comprehensive income | Recurring fair value measurement | Significant unobservable inputs (Level 3) | Financial assets at fair value through profit or loss, category trading
Financial assets
Total gains and (losses) in the period recognised in the income statement, assets	1	0
Financial assets at fair value through other comprehensive income | Recurring fair value measurement | Significant unobservable inputs (Level 3) | Financial assets at fair value through profit or loss, category other income
Financial assets
Total gains and (losses) in the period recognised in the income statement, assets	11	0
Financial assets at fair value through other comprehensive income | Loans | Recurring fair value measurement | Significant unobservable inputs (Level 3)
Financial assets
Beginning balance, financial assets	533	0
Purchases, fair value measurement, assets	1,097	47
Sales, fair value measurement, assets	0	0
Issues, fair value measurement, assets	0	0
Settlements, fair value measurement, assets	0	0
Total gains (losses) recognised in OCI, assets	0	0
Transfers into Level 3 of fair value hierarchy, assets	0	0
Transfers out of Level 3 of fair value hierarchy, assets	0	0
Ending balance, financial assets	1,642	47
Financial assets at fair value through other comprehensive income | Loans | Recurring fair value measurement | Significant unobservable inputs (Level 3) | Financial assets at fair value through profit or loss, category trading
Financial assets
Total gains and (losses) in the period recognised in the income statement, assets	1	0
Financial assets at fair value through other comprehensive income | Loans | Recurring fair value measurement | Significant unobservable inputs (Level 3) | Financial assets at fair value through profit or loss, category other income
Financial assets
Total gains and (losses) in the period recognised in the income statement, assets	11	0
Financial assets at fair value through other comprehensive income | Asset backed securities | Recurring fair value measurement | Significant unobservable inputs (Level 3)
Financial assets
Beginning balance, financial assets	200	3
Purchases, fair value measurement, assets	757	0
Sales, fair value measurement, assets	0	0
Issues, fair value measurement, assets	0	0
Settlements, fair value measurement, assets	0	(1)
Total gains (losses) recognised in OCI, assets	0	0
Transfers into Level 3 of fair value hierarchy, assets	0	0
Transfers out of Level 3 of fair value hierarchy, assets	(200)	0
Ending balance, financial assets	757	2
Financial assets at fair value through other comprehensive income | Asset backed securities | Recurring fair value measurement | Significant unobservable inputs (Level 3) | Financial assets at fair value through profit or loss, category trading
Financial assets
Total gains and (losses) in the period recognised in the income statement, assets	0	0
Financial assets at fair value through other comprehensive income | Asset backed securities | Recurring fair value measurement | Significant unobservable inputs (Level 3) | Financial assets at fair value through profit or loss, category other income
Financial assets
Total gains and (losses) in the period recognised in the income statement, assets	0	0
Financial assets at fair value through other comprehensive income | Other | Recurring fair value measurement | Significant unobservable inputs (Level 3)
Financial assets
Beginning balance, financial assets	43	1
Purchases, fair value measurement, assets	0	0
Sales, fair value measurement, assets	(42)	0
Issues, fair value measurement, assets	0	0
Settlements, fair value measurement, assets	0	0
Total gains (losses) recognised in OCI, assets	0	0
Transfers into Level 3 of fair value hierarchy, assets	0	0
Transfers out of Level 3 of fair value hierarchy, assets	0	0
Ending balance, financial assets	1	1
Financial assets at fair value through other comprehensive income | Other | Recurring fair value measurement | Significant unobservable inputs (Level 3) | Financial assets at fair value through profit or loss, category trading
Financial assets
Total gains and (losses) in the period recognised in the income statement, assets	0	0
Financial assets at fair value through other comprehensive income | Other | Recurring fair value measurement | Significant unobservable inputs (Level 3) | Financial assets at fair value through profit or loss, category other income
Financial assets
Total gains and (losses) in the period recognised in the income statement, assets	£ 0	£ 0

Fair value of financial instr_6

Fair value of financial instruments - Unrealised gains and losses recognised in the period on Level 3 assets and liabilities held at period end (Details) - GBP (£) £ in Millions	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Disclosure of detailed information about financial instruments [line items]
Trading income	£ 3,302	£ 3,853
Other income	14	39
Other comprehensive income	(1,121)	(2,620)
Significant unobservable inputs (Level 3)
Disclosure of detailed information about financial instruments [line items]
Trading income	(192)	(291)
Other income	41	(54)
Other comprehensive income	0	0
Total	(151)	(345)
Significant unobservable inputs (Level 3) | Investment properties
Disclosure of detailed information about financial instruments [line items]
Trading income	0	0
Other income	0	(3)
Other comprehensive income	0	0
Total	0	(3)
Significant unobservable inputs (Level 3) | Net derivative financial instruments
Disclosure of detailed information about financial instruments [line items]
Trading income	(191)	(186)
Other income	0	0
Other comprehensive income	0	0
Total	(191)	(186)
Trading portfolio liabilities | Significant unobservable inputs (Level 3)
Disclosure of detailed information about financial instruments [line items]
Trading income	17	15
Other income	0	0
Other comprehensive income	0	0
Total	17	15
Financial liabilities designated at fair value | Significant unobservable inputs (Level 3)
Disclosure of detailed information about financial instruments [line items]
Trading income	(29)	2
Other income	0	(1)
Other comprehensive income	0	0
Total	(29)	1
Trading portfolio assets | Significant unobservable inputs (Level 3)
Disclosure of detailed information about financial instruments [line items]
Trading income	(2)	(35)
Other income	0	0
Other comprehensive income	0	0
Total	(2)	(35)
Financial assets at fair value through the income statement | Significant unobservable inputs (Level 3)
Disclosure of detailed information about financial instruments [line items]
Trading income	15	(87)
Other income	30	(50)
Other comprehensive income	0	0
Total	45	(137)
Financial assets at fair value through other comprehensive income | Significant unobservable inputs (Level 3)
Disclosure of detailed information about financial instruments [line items]
Trading income	(2)	0
Other income	11	0
Other comprehensive income	0	0
Total	£ 9	£ 0

Fair value of financial instr_7

Fair value of financial instruments - Sensitivity analysis of valuations using unobservable inputs (Details) - Recurring fair value measurement - Significant unobservable inputs (Level 3) - GBP (£) £ in Millions	Jun. 30, 2024	Dec. 31, 2023
Favourable changes | Income statement
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions	£ 1,168	£ 965
Favourable changes | Equity
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions	36	3
Unfavourable changes | Income statement
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions	(1,510)	(1,337)
Unfavourable changes | Equity
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions	(36)	(3)
Corporate debt | Favourable changes | Income statement
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions	55	34
Corporate debt | Favourable changes | Equity
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions	0	0
Corporate debt | Unfavourable changes | Income statement
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions	(31)	(22)
Corporate debt | Unfavourable changes | Equity
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions	0	0
Loans | Favourable changes | Income statement
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions	633	545
Loans | Favourable changes | Equity
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions	32	2
Loans | Unfavourable changes | Income statement
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions	(830)	(763)
Loans | Unfavourable changes | Equity
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions	(32)	(2)
Private equity investments | Favourable changes | Income statement
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions	30	9
Private equity investments | Favourable changes | Equity
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions	0	0
Private equity investments | Unfavourable changes | Income statement
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions	(30)	(9)
Private equity investments | Unfavourable changes | Equity
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions	0	0
Asset backed securities | Favourable changes | Income statement
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions	39	36
Asset backed securities | Favourable changes | Equity
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions	4	1
Asset backed securities | Unfavourable changes | Income statement
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions	(29)	(27)
Asset backed securities | Unfavourable changes | Equity
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions	(4)	(1)
Other | Favourable changes | Income statement
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions	93	90
Other | Favourable changes | Equity
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions	0	0
Other | Unfavourable changes | Income statement
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions	(106)	(91)
Other | Unfavourable changes | Equity
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions	0	0
Interest rate derivatives | Favourable changes | Derivatives | Income statement
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions	99	78
Interest rate derivatives | Favourable changes | Derivatives | Equity
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions	0	0
Interest rate derivatives | Unfavourable changes | Derivatives | Income statement
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions	(170)	(158)
Interest rate derivatives | Unfavourable changes | Derivatives | Equity
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions	0	0
Foreign exchange derivatives | Favourable changes | Derivatives | Income statement
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions	6	4
Foreign exchange derivatives | Favourable changes | Derivatives | Equity
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions	0	0
Foreign exchange derivatives | Unfavourable changes | Derivatives | Income statement
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions	(10)	(9)
Foreign exchange derivatives | Unfavourable changes | Derivatives | Equity
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions	0	0
Credit derivatives | Favourable changes | Derivatives | Income statement
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions	11	27
Credit derivatives | Favourable changes | Derivatives | Equity
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions	0	0
Credit derivatives | Unfavourable changes | Derivatives | Income statement
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions	(15)	(32)
Credit derivatives | Unfavourable changes | Derivatives | Equity
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions	0	0
Equity derivatives | Favourable changes | Derivatives | Income statement
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions	202	142
Equity derivatives | Favourable changes | Derivatives | Equity
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions	0	0
Equity derivatives | Unfavourable changes | Derivatives | Income statement
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions	(289)	(226)
Equity derivatives | Unfavourable changes | Derivatives | Equity
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions	£ 0	£ 0

Fair value of financial instr_8

Fair value of financial instruments - Narrative (Details) - GBP (£) £ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2024	Dec. 31, 2023
Brokered certificates of deposit
Disclosure of detailed information about financial instruments [line items]
Deposits at amortised cost	£ 3,829	£ 5,162
Exit price adjustments derived from market bid-offer spreads
Disclosure of detailed information about financial instruments [line items]
Decrease in derivative fair value adjustments	60
Fair value adjustments	(498)	(558)
Uncollateralised derivative funding
Disclosure of detailed information about financial instruments [line items]
Fair value adjustments	5	(4)
Derivative credit valuation adjustments
Disclosure of detailed information about financial instruments [line items]
Decrease in derivative fair value adjustments	19
Fair value adjustments	(190)	(209)
Derivative debit valuation adjustments
Disclosure of detailed information about financial instruments [line items]
Decrease in derivative fair value adjustments	33
Fair value adjustments	111	144
Significant unobservable inputs (Level 3) | Financial instruments at fair value, category | Recurring fair value measurement
Disclosure of detailed information about financial instruments [line items]
Aggregate difference between fair value at initial recognition and transaction price yet to be recognised in profit or loss	213	194
Additions, aggregate difference between fair value at initial recognition and transaction price yet to be recognised in profit or loss	85	136
Amortisation and releases, aggregate difference between fair value at initial recognition and transaction price yet to be recognised in profit or loss	66	48
Significant unobservable inputs (Level 3) | Financial instruments at amortised cost, category | Recurring fair value measurement
Disclosure of detailed information about financial instruments [line items]
Aggregate difference between fair value at initial recognition and transaction price yet to be recognised in profit or loss	17	18
Additions, aggregate difference between fair value at initial recognition and transaction price yet to be recognised in profit or loss	0	0
Amortisation and releases, aggregate difference between fair value at initial recognition and transaction price yet to be recognised in profit or loss	1	7
Significant unobservable inputs (Level 3) | Favourable changes
Disclosure of detailed information about financial instruments [line items]
Increase in fair value measurement due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions, assets (liabilities)	1,204	968
Decrease in fair value measurement due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions, assets (liabilities)	£ 1,546	£ 1,340

Fair value of financial instr_9

Fair value of financial instruments - Fair value adjustments (Details) - GBP (£) £ in Millions	Jun. 30, 2024	Dec. 31, 2023
Exit price adjustments derived from market bid-offer spreads
Disclosure of detailed information about financial instruments [line items]
Fair value adjustments	£ (498)	£ (558)
Uncollateralised derivative funding
Disclosure of detailed information about financial instruments [line items]
Fair value adjustments	5	(4)
Derivative credit valuation adjustments
Disclosure of detailed information about financial instruments [line items]
Fair value adjustments	(190)	(209)
Derivative debit valuation adjustments
Disclosure of detailed information about financial instruments [line items]
Fair value adjustments	£ 111	£ 144

Fair value of financial inst_10

Fair value of financial instruments - Comparison of carrying amounts and fair values for assets and liabilities not held at fair value (Details) - GBP (£) £ in Millions	Jun. 30, 2024	Dec. 31, 2023	Dec. 31, 2022
Financial assets
Debt securities at amortised cost	£ 44,799	£ 39,046
Reverse repurchase agreements and other similar secured lending	2,980	1,103
Financial liabilities
Repurchase agreements and other similar secured borrowing	(39,533)	(28,554)
Debt securities in issue	(43,078)	(45,653)
Subordinated liabilities	(37,849)	(35,903)	£ (38,253)
Fair value
Financial assets
Debt securities at amortised cost	43,887	37,807
Loans and advances at amortised cost	147,555	147,323
Reverse repurchase agreements and other similar secured lending	2,980	1,103
Financial liabilities
Deposits at amortised cost	(324,092)	(301,851)
Repurchase agreements and other similar secured borrowing	(39,533)	(28,554)
Debt securities in issue	(42,994)	(45,557)
Subordinated liabilities	(39,602)	(37,295)
Gross exposure
Financial assets
Debt securities at amortised cost	44,799	39,046
Loans and advances at amortised cost	145,773	146,201
Reverse repurchase agreements and other similar secured lending	2,980	1,103
Financial liabilities
Deposits at amortised cost	(324,012)	(301,798)
Repurchase agreements and other similar secured borrowing	(39,533)	(28,554)
Debt securities in issue	(43,078)	(45,653)
Subordinated liabilities	£ (37,849)	£ (35,903)

Subordinated liabilities - Subo

Subordinated liabilities - Subordinated liabilities (Details) - GBP (£) £ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2024	Dec. 31, 2023
Disclosure of detailed information about borrowings [line items]
Opening balance as at 1 January	£ 35,903	£ 38,253
Issuances	7,354	5,986
Redemptions	(4,804)	(7,431)
Other	(604)	(905)
Closing balance	37,849	35,903
Total subordinated liabilities	38,392	36,482
At fair value
Disclosure of detailed information about borrowings [line items]
Opening balance as at 1 January	579
Closing balance	£ 543	£ 579

Subordinated liabilities - Narr

Subordinated liabilities - Narrative (Details) - GBP (£) £ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2024	Dec. 31, 2023
Disclosure of detailed information about borrowings [line items]
Issuances	£ 7,354	£ 5,986
Redemption of subordinated debt	4,804	£ 7,431
Barclays Bank PLC loans issued intra-group Barclays PLC | Barclays PLC
Disclosure of detailed information about borrowings [line items]
Issuances	5,999
4.973% Fixed Rate Resetting Tier 2 Subordinated Callable Notes | Fixed interest rate | Barclays PLC
Disclosure of detailed information about borrowings [line items]
Issuances	£ 1,276
Interest rate	4.973%
USD Notes | Floating interest rate
Disclosure of detailed information about borrowings [line items]
Issuances	£ 79

Provisions (Details)

Provisions (Details) - GBP (£) £ in Millions	Jun. 30, 2024	Dec. 31, 2023
Disclosure of other provisions [line items]
Provisions	£ 757	£ 817
Customer redress
Disclosure of other provisions [line items]
Provisions	18	21
Legal, competition and regulatory matters
Disclosure of other provisions [line items]
Provisions	54	59
Redundancy and restructuring
Disclosure of other provisions [line items]
Provisions	91	126
Undrawn contractually committed facilities and guarantees
Disclosure of other provisions [line items]
Provisions	452	473
Sundry provisions
Disclosure of other provisions [line items]
Provisions	£ 142	£ 138

Retirement benefits (Details)

Retirement benefits (Details) - GBP (£) £ in Millions	Jun. 30, 2024	Dec. 31, 2023	Sep. 30, 2023	Sep. 30, 2022
Disclosure of fair value of plan assets [line items]
Surplus in plan	£ 3,400	£ 3,500
Defined benefit plans other than multi-employer plans, state plans and plans that share risks between entities under common control | Pension defined benefit plans | United Kingdom
Disclosure of fair value of plan assets [line items]
Surplus in plan	£ 3,500	£ 3,600
Defined benefit plans other than multi-employer plans, state plans and plans that share risks between entities under common control | Pension defined benefit plans | United Kingdom | Deficit contributions valuation recovery plan 2022
Disclosure of fair value of plan assets [line items]
Surplus in plan			£ 2,020
Defined benefit plans other than multi-employer plans, state plans and plans that share risks between entities under common control | Pension defined benefit plans | United Kingdom | Deficit contributions valuation recovery plan 2019
Disclosure of fair value of plan assets [line items]
Surplus in plan				£ 1,970

Other reserves - Other reserves

Other reserves - Other reserves (Details) - GBP (£) £ in Millions	Jun. 30, 2024	Dec. 31, 2023
Disclosure of reserves within equity [line items]
Other reserves	£ (1,387)	£ (363)
Currency translation reserve
Disclosure of reserves within equity [line items]
Other reserves	3,676	3,783
Fair value through other comprehensive income reserve
Disclosure of reserves within equity [line items]
Other reserves	(1,493)	(1,207)
Cash flow hedging reserve
Disclosure of reserves within equity [line items]
Other reserves	(3,064)	(2,895)
Own credit reserve
Disclosure of reserves within equity [line items]
Other reserves	(702)	(240)
Other reserves
Disclosure of reserves within equity [line items]
Other reserves	£ 196	£ 196

Other reserves - Narrative (Det

Other reserves - Narrative (Details) - GBP (£) £ in Millions	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Disclosure of reserves within equity [line items]
Other reserves	£ (1,387)		£ (363)
Currency translation reserve
Disclosure of reserves within equity [line items]
Other reserves	3,676		3,783
Increase (decrease) in equity	(107)
Fair value through other comprehensive income reserve
Disclosure of reserves within equity [line items]
Other reserves	(1,493)		(1,207)
Increase (decrease) in equity	(286)	£ 135
Gains (losses) on changes in fair value	(236)	293
Net gains (losses) transferred to net profits	158	102
Tax (credit) charge	(107)	54
Cash flow hedging reserve
Disclosure of reserves within equity [line items]
Other reserves	(3,064)		(2,895)
Increase (decrease) in equity	(169)	2,661
Gains (losses) on changes in fair value	(1,162)	1,999
Net gains (losses) transferred to net profits	(935)	(1,665)
Tax (credit) charge	(58)	£ 1,003
Own credit reserve
Disclosure of reserves within equity [line items]
Other reserves	(702)		(240)
Increase (decrease) in equity	(462)
Tax (credit) charge	(173)
Loss on change in value of foreign currency basis spreads, before tax	635
Other reserves
Disclosure of reserves within equity [line items]
Other reserves	£ 196		£ 196

Contingent liabilities and co_3

Contingent liabilities and commitments (Details) - GBP (£) £ in Millions	Jun. 30, 2024	Dec. 31, 2023
Contingent liabilities and financial guarantees
Disclosure of contingent liabilities [line items]
Notional amount	£ 26,825	£ 26,829
Loans
Disclosure of contingent liabilities [line items]
Notional amount	350,019	337,935
Guarantees and letters of credit pledged as collateral security | Contingent liabilities and financial guarantees
Disclosure of contingent liabilities [line items]
Notional amount	17,272	17,578
Performance guarantees, acceptances and endorsements | Contingent liabilities and financial guarantees
Disclosure of contingent liabilities [line items]
Notional amount	9,553	9,251
Documentary credits and other short-term trade related transactions | Loans
Disclosure of contingent liabilities [line items]
Notional amount	2,489	2,352
Standby facilities, credit lines and other commitments | Loans
Disclosure of contingent liabilities [line items]
Notional amount	£ 347,530	£ 335,583

Legal, competition and regula_2

Legal, competition and regulatory matters (Details) € in Millions, £ in Millions, $ in Millions

1 Months Ended

6 Months Ended

12 Months Ended

May 31, 2024 EUR (€)

Jan. 31, 2024 decision

Dec. 31, 2023 lawsuit

Nov. 30, 2023 request

Jan. 31, 2023 lawsuit

Apr. 30, 2021 USD ($)

Jun. 30, 2024 GBP (£) lawsuit plaintiff

Jun. 30, 2024 USD ($) lawsuit plaintiff

Jun. 30, 2023 GBP (£)

Dec. 31, 2021 GBP (£)

Dec. 31, 2018 GBP (£)

Dec. 31, 2017 lawsuit

Dec. 31, 2016 lawsuit

Dec. 31, 2013 GBP (£)

Dec. 31, 2008 USD ($) agreement

Disclosure of contingent liabilities [line items]

Losses on litigation settlements | £

£ 56

£ 34

Other proceedings

Disclosure of contingent liabilities [line items]

Number of arbitration requests received | request

2

Sterling LIBOR case in SDNY

Disclosure of contingent liabilities [line items]

Number of lawsuits with damages sought

2

Non-US forex civil actions

Disclosure of contingent liabilities [line items]

Number of lawsuits with damages sought

2

2

Civil actions in respect of VRDO - SNDY

Disclosure of contingent liabilities [line items]

Number of lawsuits with damages sought

3

3

Interest rate swap and credit default swap US civil actions

Disclosure of contingent liabilities [line items]

Number of lawsuits with damages sought

1

1

Civil actions in respect of the US anti-terrorism act

Disclosure of contingent liabilities [line items]

Number of lawsuits with damages sought

8

8

Number of plaintiffs | plaintiff

4,000

4,000

Civil actions in respect of the US anti-terrorism act - EDNY

Disclosure of contingent liabilities [line items]

Number of lawsuits with damages sought

6

Number of lawsuits dismissed

3

Number of lawsuits subject to appeal

1

Number of lawsuits consolidated into a separate lawsuit

2

2

Number of separate lawsuits

1

1

Number of initial lawsuits amended

1

Number of lawsuits stayed

2

2

Civil actions in respect of the US anti-terrorism act - SDNY

Disclosure of contingent liabilities [line items]

Number of lawsuits with damages sought

2

Derivative transactions civil action

Disclosure of contingent liabilities [line items]

Loss contingency, damages sought, claimed amounts, value | £

£ 329

Losses on litigation settlements | €

€ 43.5

Motor finance commission arrangements

Disclosure of contingent liabilities [line items]

Number of final decisions by the UK Financial Ombudsman Service | decision

2

Number of final decisions by the UK Financial Ombudsman Service about commision arrangements | decision

1

HMRC assessments concerning UK VAT

Disclosure of contingent liabilities [line items]

Loss contingency, damages sought, claimed amounts, value | £

£ 181

HMRC assessments concerning UK VAT | Barclays UK PLC

Disclosure of contingent liabilities [line items]

Loss contingency, damages sought, claimed amounts, value | £

128

Originated and sold to third parties by Acquired Subsidiary | RMBS repurchase requests | US residential and commercial mortgage-related activity and litigation

Disclosure of contingent liabilities [line items]

Number of lawsuits with damages sought

1

1

Barclays Bank PLC | FCA proceedings and other investigations

Disclosure of contingent liabilities [line items]

Number of advisory service agreements | agreement

2

Loss contingency, financial penalty warning | £

£ 50

Barclays Bank PLC | Non-US forex civil actions

Disclosure of contingent liabilities [line items]

Number of lawsuits pending

1

Barclays Bank PLC | BDC Finance LLC

Disclosure of contingent liabilities [line items]

Litigation settlements approved, value | $

$ 3.3

$ 298

Barclays Bank PLC | HMRC assessments concerning UK VAT

Disclosure of contingent liabilities [line items]

Loss contingency, damages sought, claimed amounts, value | £

£ 53

Barclays Bank PLC | Lawsuits with damages sought | USD LIBOR cases in MDL court

Disclosure of contingent liabilities [line items]

Number of lawsuits with damages sought

1

1

Loss contingency, damages sought, claimed amounts, value | $

$ 100