Barclays (BCS) 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 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	0000312069
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		£ 18,642	£ 15,632
Interest and similar expense		(12,514)	(9,309)
Net interest income		6,128	6,323
Fee and commission income		5,429	5,257
Fee and commission expense		(1,691)	(1,898)
Net fee and commission income		3,738	3,359
Net trading income		3,228	3,786
Net investment income		160	10
Other income		23	44
Total income		13,277	13,522
Staff costs		(4,964)	(4,985)
Infrastructure, administration and general expenses		(3,033)	(3,045)
UK regulatory levies	[1]	(120)	0
Litigation and conduct		(64)	(32)
Operating expenses		(8,181)	(8,062)
Share of post-tax results of associates and joint ventures		16	(2)
Profit before impairment		5,112	5,458
Credit impairment charges		(897)	(896)
Profit before tax		4,215	4,562
Tax charge		(892)	(914)
Profit after tax		3,323	3,648
Attributable to:
Shareholders of the parent		2,787	3,111
Other equity holders		510	507
Equity holders of the parent		3,297	3,618
Non-controlling interests		26	30
Profit after tax		£ 3,323	£ 3,648
Earnings per share
Basic earnings per ordinary share (in GBP per share)		£ 0.186	£ 0.199
Diluted earnings per ordinary share (in GBP per share)		£ 0.181	£ 0.193
[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		£ 3,323	£ 3,648
Other comprehensive (loss)/income that may be recycled to profit or loss:
Currency translation reserve	[1]	(84)	(1,173)
Fair value through other comprehensive income reserve	[1]	(269)	77
Cash flow hedging reserve	[1]	(90)	(755)
Other comprehensive loss that may be recycled to profit	[1]	(443)	(1,851)
Other comprehensive loss not recycled to profit or loss:
Retirement benefit remeasurements	[1]	(97)	(476)
Fair value through other comprehensive income reserve	[1]	0	(2)
Own credit	[1]	(462)	(494)
Other comprehensive loss not recycled to profit	[1]	(559)	(972)
Other comprehensive loss for the period		(1,002)	(2,823)
Total comprehensive income for the period		2,321	825
Attributable to:
Equity holders of the parent		2,295	795
Non-controlling interests		26	30
Total comprehensive income for the period		£ 2,321	£ 825
[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	£ 243,459	£ 224,634
Cash collateral and settlement balances	146,754	108,889
Debt securities at amortised cost	61,700	56,749
Loans and advances at amortised cost to banks	8,014	9,459
Loans and advances at amortised cost to customers	329,795	333,288
Reverse repurchase agreements and other similar secured lending at amortised cost	4,724	2,594
Trading portfolio assets	197,306	174,605
Financial assets at fair value through the income statement	215,206	206,651
Derivative financial instruments	253,614	256,836
Financial assets at fair value through other comprehensive income	82,747	71,836
Investments in associates and joint ventures	876	879
Goodwill and intangible assets	7,839	7,794
Property, plant and equipment	3,650	3,417
Current tax assets	176	121
Deferred tax assets	6,274	5,960
Retirement benefit assets	3,541	3,667
Assets included in a disposal group classified as held for sale	3,725	3,916
Other assets	7,234	6,192
Total assets	1,576,634	1,477,487
Liabilities
Deposits at amortised cost from banks	19,371	14,472
Deposits at amortised cost from customers	538,081	524,317
Cash collateral and settlement balances	144,582	94,084
Repurchase agreements and other similar secured borrowings at amortised cost	52,352	41,601
Debt securities in issue	96,772	96,825
Subordinated liabilities	11,795	10,494
Trading portfolio liabilities	59,315	58,669
Financial liabilities designated at fair value	320,957	297,539
Derivative financial instruments	242,136	250,044
Current tax liabilities	686	529
Deferred tax liabilities	22	22
Retirement benefit liabilities	277	266
Provisions	1,292	1,584
Liabilities included in a disposal group classified as held for sale	3,984	3,164
Other liabilities	13,179	12,013
Total liabilities	1,504,801	1,405,623
Equity
Called up share capital and share premium	4,256	4,288
Other reserves	(882)	(77)
Retained earnings	54,840	53,734
Shareholders' equity attributable to ordinary shareholders of the parent	58,214	57,945
Other equity instruments	12,959	13,259
Total equity excluding non-controlling interests	71,173	71,204
Non-controlling interests	660	660
Total equity	71,833	71,864
Total liabilities and equity	£ 1,576,634	£ 1,477,487

Condensed consolidated statem_2

Condensed consolidated statement of changes in equity (unaudited) - GBP (£) £ in Millions	Total		Total	Called up share capital and share premium	[1],[2]	Other equity instruments	[3]	Other reserves		Retained earnings	Non-controlling interests
Beginning Balance, equity at Dec. 31, 2022	£ 69,260		£ 68,292	£ 4,373		£ 13,284		£ (2,192)		£ 52,827	£ 968
Profit after tax	3,648		3,618			507				3,111	30
Currency translation movements	(1,173)	[4]	(1,173)					(1,173)
Fair value through other comprehensive income reserve	75		75					75
Cash flow hedges	(755)	[4]	(755)					(755)
Retirement benefit remeasurements	(476)	[4]	(476)							(476)
Own credit	(494)	[4]	(494)					(494)
Total comprehensive income for the period	825		795			507		(2,347)		2,635	30
Employee share schemes and hedging thereof	409		409	38						371
Issue and redemption of other equity instruments	399		492			500				(8)	(93)
Other equity instruments coupon paid	(507)		(507)			(507)
Vesting of employee share schemes	(488)		(488)					(4)		(484)
Dividends paid	(823)		(793)							(793)	(30)
Repurchase of shares	(503)		(503)	(86)				86		(503)
Other movements	(27)		(28)			(25)				(3)	1
Ending Balance, equity at Jun. 30, 2023	68,545		67,669	4,325		13,759		(4,457)		54,042	876
Beginning Balance, equity at Dec. 31, 2022	69,260		68,292	4,373		13,284		(2,192)		52,827	968
Ending Balance, equity at Dec. 31, 2023	71,864		71,204	4,288		13,259		(77)	[5]	53,734	660
Beginning Balance, equity at Jun. 30, 2023	68,545		67,669	4,325		13,759		(4,457)		54,042	876
Profit after tax	1,675		1,641			478				1,163	34
Currency translation movements	72		72					72
Fair value through other comprehensive income reserve	119		119					119
Cash flow hedges	4,283		4,283					4,283
Retirement benefit remeasurements	(379)		(379)							(379)
Own credit	(216)		(216)					(216)
Total comprehensive income for the period	5,554		5,520			478		4,258		784	34
Employee share schemes and hedging thereof	212		212	86						126
Issue and redemption of other equity instruments	(779)		(560)			(530)				(30)	(219)
Other equity instruments coupon paid	(478)		(478)			(478)
Vesting of employee share schemes	(26)		(26)					(4)		(22)
Dividends paid	(451)		(417)							(417)	(34)
Repurchase of shares	(754)		(754)	(123)				123		(754)
Other movements	41		38			30		3		5	3
Ending Balance, equity at Dec. 31, 2023	71,864		71,204	4,288		13,259		(77)	[5]	53,734	660
Profit after tax	3,323		3,297			510				2,787	26
Currency translation movements	(84)	[4]	(84)					(84)	[5]
Fair value through other comprehensive income reserve	(269)		(269)					(269)	[5]
Cash flow hedges	(90)	[4]	(90)					(90)	[5]
Retirement benefit remeasurements	(97)	[4]	(97)							(97)
Own credit	(462)	[4]	(462)					(462)	[5]
Total comprehensive income for the period	2,321		2,295			510		(905)	[5]	2,690	26
Employee share schemes and hedging thereof	647		647	65						582
Issue and redemption of other equity instruments	(355)		(355)			(263)				(92)
Other equity instruments coupon paid	(510)		(510)			(510)
Vesting of employee share schemes	(485)		(485)					3	[5]	(488)
Dividends paid	(822)		(796)							(796)	(26)
Repurchase of shares	(782)		(782)	(97)				97	[5]	(782)
Other movements	(45)		(45)			(37)				(8)
Ending Balance, equity at Jun. 30, 2024	£ 71,833		£ 71,173	£ 4,256		£ 12,959		£ (882)	[5]	£ 54,840	£ 660
[1] 1 During the period ended 30 June 2024, Barclays PLC announced and executed a share buy-back of up to £1,000m. 389m shares were repurchased and cancelled. The nominal value of £97m has been transferred from Share capital to Capital redemption reserve within Other reserves. During the year ended 31 December 2023, two share buybacks were executed, totalling £1,250m. Barclays PLC repurchased and cancelled 837m shares. The nominal value of £209m was transferred from Share capital to Capital redemption reserve within Other reserves. Other equity instruments of £12,959m (December 2023: £13,259m) comprise AT1 securities issued by Barclays PLC. There was one issuance in the form of Fixed Rate Resetting Perpetual Subordinated Contingent Convertible Securities for £1,245m (net of £5m issuance costs) and one redemption of £1,509m (net of £6m issuance costs, transferred to retained earnings on redemption) for the period ended 30th 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, for £3,140m, which includes issuance costs of £10m and two redemptions totalling £3,170m. Reported net of tax. See Note 14 Other reserves.

Condensed consolidated statem_3

Condensed consolidated statement of changes in equity (unaudited) (Parenthetical) £ in Millions, shares in Millions		6 Months Ended		12 Months Ended
		Jun. 30, 2024 GBP (£) redemption issuance £ / shares shares	Dec. 31, 2023 GBP (£) shares	Dec. 31, 2023 GBP (£) redemption issuance shareBuyback shares
Repurchase of treasury shares (in shares) | shares		389		837
Repurchase of shares		£ (782)	£ (754)
Number of share buybacks | shareBuyback				2
Equity		71,833	71,864	£ 71,864
Capital redemption reserve
Repurchase of shares		97		209
Issued capital
Repurchase of shares		(97)		(209)
Other equity instruments
Equity	[1]	12,959	£ 13,259	£ 13,259
Maximum
Payments to acquire or redeem entity's shares		£ 1,000
Ordinary shares
Number of shares issued (in shares) | shares		14,826	15,155	15,155
Par value per share (in GBP per share) | £ / shares		£ 0.25
Payments to acquire or redeem entity's shares				£ 1,250
Fixed Rate Resetting Perpetual Subordinated Contingent Convertible Securities | Other equity instruments
Equity		£ 12,959	£ 13,259	£ 13,259
Number of convertible instruments issued | issuance		1		3
Issue of convertible instruments		£ 1,245		£ 3,140
Issuance costs of convertible instruments		£ 5		£ 10
Number of convertible instruments redeemed | redemption		1		2
Notional amount		£ 1,509	£ 3,170	£ 3,170
Issuance costs of convertible instruments redeemed		£ 6
[1] Other equity instruments of £12,959m (December 2023: £13,259m) comprise AT1 securities issued by Barclays PLC. There was one issuance in the form of Fixed Rate Resetting Perpetual Subordinated Contingent Convertible Securities for £1,245m (net of £5m issuance costs) and one redemption of £1,509m (net of £6m issuance costs, transferred to retained earnings on redemption) for the period ended 30th 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, for £3,140m, which includes issuance costs of £10m and two redemptions totalling £3,170m.

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		£ 4,215	£ 4,562
Adjustment for non-cash items		4,976	10,085
Net decrease in loans and advances at amortised cost		1,839	7,734
Net increase in deposits at amortised cost		18,663	8,919
Net decrease in debt securities in issue		(1,686)	(9,596)
Changes in other operating assets and liabilities		10,103	2,553
Corporate income tax paid		(540)	(346)
Net cash from operating activities		37,570	23,911
Net cash from investing activities		(16,333)	(14,784)
Net cash from financing activities	[1]	166	(191)
Effect of exchange rates on cash and cash equivalents		(1,624)	(6,069)
Net increase in cash and cash equivalents		19,779	2,867
Cash and cash equivalents at beginning of the period		248,007	278,790
Cash and cash equivalents at end of the period		£ 267,786	£ 281,657
[1] Issuance and redemption of debt securities included in financing activities relate to instruments that qualify as eligible liabilities and satisfy regulatory requirements for MREL instruments which came into effect during 2019.

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 geography 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 and geographical breakdown by stages of loans and advances at amortised cost and the impairment allowance. Also included are stage allocation of debt securities and off-balance sheet loan commitments and financial guarantee contracts 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. Gross exposure Impairment allowance Stage 1 Stage 2 Stage 3 Total Stage 1 Stage 2 Stage 3 Total As at 30.06.24 £m £m £m £m £m £m £m £m Retail mortgages 142,023 20,811 1,691 164,525 39 80 101 220 Retail credit cards 8,673 2,021 194 10,888 109 459 95 663 Retail other 6,773 1,181 236 8,190 51 112 142 305 Corporate loans 1 50,913 8,266 1,525 60,704 159 184 327 670 Total UK 208,382 32,279 3,646 244,307 358 835 665 1,858 Retail mortgages 1,570 37 510 2,117 2 — 278 280 Retail credit cards 21,766 3,325 1,844 26,935 399 1,075 1,507 2,981 Retail other 1,618 131 162 1,911 2 1 26 29 Corporate loans 63,197 4,054 992 68,243 91 158 307 556 Total Rest of the World 88,151 7,547 3,508 99,206 494 1,234 2,118 3,846 Total loans and advances at amortised cost 296,533 39,826 7,154 343,513 852 2,069 2,783 5,704 Debt securities at amortised cost 58,088 3,632 — 61,720 10 10 — 20 Total loans and advances at amortised cost including debt securities 354,621 43,458 7,154 405,233 862 2,079 2,783 5,724 Off-balance sheet loan commitments and financial guarantee contracts 2 390,104 19,948 1,034 411,086 186 256 32 474 Total 3,4 744,725 63,406 8,188 816,319 1,048 2,335 2,815 6,198 Net exposure Coverage ratio Stage 1 Stage 2 Stage 3 Total Stage 1 Stage 2 Stage 3 Total As at 30.06.24 £m £m £m £m % % % % Retail mortgages 141,984 20,731 1,590 164,305 — 0.4 6.0 0.1 Retail credit cards 8,564 1,562 99 10,225 1.3 22.7 49.0 6.1 Retail other 6,722 1,069 94 7,885 0.8 9.5 60.2 3.7 Corporate loans 1 50,754 8,082 1,198 60,034 0.3 2.2 21.4 1.1 Total UK 208,024 31,444 2,981 242,449 0.2 2.6 18.2 0.8 Retail mortgages 1,568 37 232 1,837 0.1 — 54.5 13.2 Retail credit cards 21,367 2,250 337 23,954 1.8 32.3 81.7 11.1 Retail other 1,616 130 136 1,882 0.1 0.8 16.0 1.5 Corporate loans 63,106 3,896 685 67,687 0.1 3.9 30.9 0.8 Total Rest of the World 87,657 6,313 1,390 95,360 0.6 16.4 60.4 3.9 Total loans and advances at amortised cost 295,681 37,757 4,371 337,809 0.3 5.2 38.9 1.7 Debt securities at amortised cost 58,078 3,622 — 61,700 — 0.3 — — Total loans and advances at amortised cost including debt securities 353,759 41,379 4,371 399,509 0.2 4.8 38.9 1.4 Off-balance sheet loan commitments and financial guarantee contracts 2 389,918 19,692 1,002 410,612 — 1.3 3.1 0.1 Total 3,4 743,677 61,071 5,373 810,121 0.1 3.7 34.4 0.8 1 Includes Business Banking, which has a gross exposure of £14.1bn and an impairment allowance of £367m. This comprises £79m impairment allowance on £9.6bn Stage 1 exposure, £53m on £3.3bn Stage 2 exposure and £235m on £1.2bn Stage 3 exposure. Excluding this, total coverage for corporate loans in UK is 0.7%. 2 Excludes loan commitments and financial guarantees of £19.3bn carried at fair value and includes exposures relating to financial assets classified as assets held for sale. 3 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 £228.4bn and an impairment allowance of £154m. This comprises £18m impairment allowance on £227.2bn Stage 1 exposure, £3m on £1.1bn Stage 2 exposure and £133m on £140m Stage 3 exposure. 4 The annualised loan loss rate is 45bps after applying the total impairment charge of £897m. Gross exposure Impairment allowance Stage 1 Stage 2 Stage 3 Total Stage 1 Stage 2 Stage 3 Total As at 31.12.23 £m £m £m £m £m £m £m £m Retail mortgages 146,001 19,123 1,812 166,936 43 77 112 232 Retail credit cards 8,094 2,128 198 10,420 111 492 107 710 Retail other 6,832 1,252 264 8,348 56 117 144 317 Corporate loans 1 54,257 8,673 1,692 64,622 191 214 346 751 Total UK 215,184 31,176 3,966 250,326 401 900 709 2,010 Retail mortgages 4,201 346 612 5,159 7 28 316 351 Retail credit cards 22,315 3,450 1,522 27,287 412 1,138 1,226 2,776 Retail other 1,637 91 229 1,957 3 1 32 36 Corporate loans 58,248 4,629 862 63,739 96 200 252 548 Total Rest of the World 86,401 8,516 3,225 98,142 518 1,367 1,826 3,711 Total loans and advances at amortised cost 301,585 39,692 7,191 348,468 919 2,267 2,535 5,721 Debt securities 52,869 3,907 — 56,776 11 16 — 27 Total loans and advances at amortised cost including debt securities 354,454 43,599 7,191 405,244 930 2,283 2,535 5,748 Off-balance sheet loan commitments and financial guarantee contracts 2 374,063 24,208 1,037 399,308 173 287 44 504 Total 3,4 728,517 67,807 8,228 804,552 1,103 2,570 2,579 6,252 Net exposure Coverage ratio Stage 1 Stage 2 Stage 3 Total Stage 1 Stage 2 Stage 3 Total As at 31.12.23 £m £m £m £m % % % % Retail mortgages 145,958 19,046 1,700 166,704 — 0.4 6.2 0.1 Retail credit cards 7,983 1,636 91 9,710 1.4 23.1 54.0 6.8 Retail other 6,776 1,135 120 8,031 0.8 9.3 54.5 3.8 Corporate loans 1 54,066 8,459 1,346 63,871 0.4 2.5 20.4 1.2 Total UK 214,783 30,276 3,257 248,316 0.2 2.9 17.9 0.8 Retail mortgages 4,194 318 296 4,808 0.2 8.1 51.6 6.8 Retail credit cards 21,903 2,312 296 24,511 1.8 33.0 80.6 10.2 Retail other 1,634 90 197 1,921 0.2 1.1 14.0 1.8 Corporate loans 58,152 4,429 610 63,191 0.2 4.3 29.2 0.9 Total Rest of the World 85,883 7,149 1,399 94,431 0.6 16.1 56.6 3.8 Total loans and advances at amortised cost 300,666 37,425 4,656 342,747 0.3 5.7 35.3 1.6 Debt securities 52,858 3,891 — 56,749 — 0.4 — — Total loans and advances at amortised cost including debt securities 353,524 41,316 4,656 399,496 0.3 5.2 35.3 1.4 Off-balance sheet loan commitments and financial guarantee contracts 2 373,890 23,921 993 398,804 — 1.2 4.2 0.1 Total 3,4 727,414 65,237 5,649 798,300 0.2 3.8 31.3 0.8 1 Includes Business Banking, which has a gross exposure of £15.2bn and an impairment allowance of £431m. This comprises £99m impairment allowance on £9.8bn Stage 1 exposure, £81m on £4.1bn Stage 2 exposure and £251m on £1.3bn Stage 3 exposure. Excluding this, total coverage for corporate loans in UK is 0.6%. 2 Excludes loan commitments and financial guarantees of £16.5bn carried at fair value and includes exposures relating to financial assets classified as assets held for sale. 3 Other financial assets subject to impairment not included 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 £183.6bn and impairment allowance of £151m. This comprises £16m impairment allowance on £182.8bn Stage 1 exposure, £2m on £0.6bn Stage 2 exposure and £133m on £140m Stage 3 exposure. 4 The annualised loan loss rate is 46bps after applying the total impairment charge of £1,881m. 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 Rest of the World 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 Rest of the World 3,182 35 1.1 733 73 10.0 176 128 72.7 4,091 236 5.8 Loans and advances at amortised cost by product The table below presents a product breakdown by stages of loans and advances at amortised cost. Also included is a breakdown of Stage 2 past due balances. Stage 2 As at 30.06.24 Stage 1 Not past due <=30 days past due >30 days past due Total Stage 3 Total Gross exposure £m £m £m £m £m £m £m Retail mortgages 143,593 17,979 2,054 815 20,848 2,201 166,642 Retail credit cards 30,439 4,685 367 294 5,346 2,038 37,823 Retail other 8,391 1,065 106 141 1,312 398 10,101 Corporate loans 114,110 12,017 57 246 12,320 2,517 128,947 Total 296,533 35,746 2,584 1,496 39,826 7,154 343,513 Impairment allowance Retail mortgages 41 44 16 20 80 379 500 Retail credit cards 508 1,191 160 183 1,534 1,602 3,644 Retail other 53 78 17 18 113 168 334 Corporate loans 250 327 7 8 342 634 1,226 Total 852 1,640 200 229 2,069 2,783 5,704 Net exposure Retail mortgages 143,552 17,935 2,038 795 20,768 1,822 166,142 Retail credit cards 29,931 3,494 207 111 3,812 436 34,179 Retail other 8,338 987 89 123 1,199 230 9,767 Corporate loans 113,860 11,690 50 238 11,978 1,883 127,721 Total 295,681 34,106 2,384 1,267 37,757 4,371 337,809 Coverage ratio % % % % % % % Retail mortgages — 0.2 0.8 2.5 0.4 17.2 0.3 Retail credit cards 1.7 25.4 43.6 62.2 28.7 78.6 9.6 Retail other 0.6 7.3 16.0 12.8 8.6 42.2 3.3 Corporate loans 0.2 2.7 12.3 3.3 2.8 25.2 1.0 Total 0.3 4.6 7.7 15.3 5.2 38.9 1.7 As at 31.12.23 Gross exposure £m £m £m £m £m £m £m Retail mortgages 150,202 16,834 1,971 664 19,469 2,424 172,095 Retail credit cards 30,409 4,858 392 328 5,578 1,720 37,707 Retail other 8,469 1,094 126 123 1,343 493 10,305 Corporate loans 112,505 12,960 179 163 13,302 2,554 128,361 Total 301,585 35,746 2,668 1,278 39,692 7,191 348,468 Impairment allowance Retail mortgages 50 73 20 12 105 428 583 Retail credit cards 523 1,257 166 207 1,630 1,333 3,486 Retail other 59 82 18 18 118 176 353 Corporate loans 287 399 8 7 414 598 1,299 Total 919 1,811 212 244 2,267 2,535 5,721 Net exposure Retail mortgages 150,152 16,761 1,951 652 19,364 1,996 171,512 Retail credit cards 29,886 3,601 226 121 3,948 387 34,221 Retail other 8,410 1,012 108 105 1,225 317 9,952 Corporate loans 112,218 12,561 171 156 12,888 1,956 127,062 Total 300,666 33,935 2,456 1,034 37,425 4,656 342,747 Coverage ratio % % % % % % % Retail mortgages — 0.4 1.0 1.8 0.5 17.7 0.3 Retail credit cards 1.7 25.9 42.3 63.1 29.2 77.5 9.2 Retail other 0.7 7.5 14.3 14.6 8.8 35.7 3.4 Corporate loans 0.3 3.1 4.5 4.3 3.1 23.4 1.0 Total 0.3 5.1 7.9 19.1 5.7 35.3 1.6 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 Retail mortgages £m £m £m £m £m £m £m £m As at 1 January 2024 150,202 50 19,469 105 2,424 428 172,095 583 Transfers from Stage 1 to Stage 2 (7,828) (4) 7,828 4 — — — — Transfers from Stage 2 to Stage 1 4,688 20 (4,688) (20) — — — — Transfers to Stage 3 (76) (1) (158) (5) 234 6 — — Transfers from Stage 3 30 3 76 1 (106) (4) — — Business activity in the period 9,077 3 224 1 — — 9,301 4 Refinements to models used for calculation — — — — — — — — Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes (3,874) (22) (554) 29 (8) 3 (4,436) 10 Final repayments (6,149) (3) (1,033) (6) (204) (12) (7,386) (21) Disposals 1 (2,477) (5) (316) (29) (129) (32) (2,922) (66) Write-offs — — — — (10) (10) (10) (10) As at 30 June 2024 143,593 41 20,848 80 2,201 379 166,642 500 Retail credit cards As at 1 January 2024 30,409 523 5,578 1,630 1,720 1,333 37,707 3,486 Transfers from Stage 1 to Stage 2 (1,898) (63) 1,898 63 — — — — Transfers from Stage 2 to Stage 1 1,595 389 (1,595) (389) — — — — Transfers to Stage 3 (250) (10) (728) (348) 978 358 — — Transfers from Stage 3 12 6 13 5 (25) (11) — — Business activity in the period 1,547 31 72 23 1 1 1,620 55 Refinements to models used for calculation 2 — 27 — (25) — 11 — 13 Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes (202) (371) 306 654 8 526 112 809 Final repayments (75) (4) (22) (9) (2) (2) (99) (15) Disposals 1 (699) (20) (176) (70) (79) (51) (954) (141) Write-offs — — — — (563) (563) (563) (563) As at 30 June 2024 30,439 508 5,346 1,534 2,038 1,602 37,823 3,644 1 The £2.9bn of gross disposals reported within Retail mortgages relate to sale of the performing Italian mortgage portfolio. The £954m of gross disposals reported within Retail credit cards include £876m sale of the outstanding US Cards receivables to Blackstone and £78m of other debt sales undertaken during the period. 2 Refinements to models used for calculation reported within Retail credit cards include a £43m movement in the US Cards and a £(30)m movement in the UK 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. 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 Retail other £m £m £m £m £m £m £m £m As at 1 January 2024 8,469 59 1,343 118 493 176 10,305 353 Transfers from Stage 1 to Stage 2 (516) (7) 516 7 — — — — Transfers from Stage 2 to Stage 1 371 23 (371) (23) — — — — Transfers to Stage 3 (99) (1) (117) (23) 216 24 — — Transfers from Stage 3 26 1 47 1 (73) (2) — — Business activity in the period 2,092 13 117 9 6 4 2,215 26 Refinements to models used for calculation — — — — — — — — Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes (254) (28) (107) 28 (7) 55 (368) 55 Final repayments (1,698) (7) (116) (4) (160) (18) (1,974) (29) Disposals 1 — — — — (24) (18) (24) (18) Write-offs — — — — (53) (53) (53) (53) As at 30 June 2024 8,391 53 1,312 113 398 168 10,101 334 Corporate loans As at 1 January 2024 112,505 287 13,302 414 2,554 598 128,361 1,299 Transfers from Stage 1 to Stage 2 (2,905) (21) 2,905 21 — — — — Transfers from Stage 2 to Stage 1 2,769 77 (2,769) (77) — — — — Transfers to Stage 3 (244) (2) (586) (28) 830 30 — — Transfers from Stage 3 165 8 136 12 (301) (20) — — Business activity in the period 15,755 27 637 16 136 6 16,528 49 Refinements to models used for calculation 2 — (21) — 9 — — — (12) Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes 3 4,398 (81) (136) 26 (344) 167 3,918 112 Final repayments (18,303) (23) (1,164) (50) (224) (13) (19,691) (86) Disposals 1 (30) (1) (5) (1) — — (35) (2) Write-offs — — — — (134) (134) (134) (134) As at 30 June 2024 114,110 250 12,320 342 2,517 634 128,947 1,226 1 The £24m of gross disposals reported within Retail other relate to debt sales undertaken during the period. The £35m of gross disposals reported within Corporate loans relate to debt sales undertaken during the period. 2 Refinements to models used for calculation reported within Corporate loans include a £(33)m movement in the ESHLA and a £21m movement in 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. 3 'Net drawdowns, repayments, net re-measurement and movements due to exposure and risk parameter changes' reported within Corporate loans includes assets of £0.3bn de-recognised due to payment received on defaulted loans from government guarantees issued under the government’s Bounce Back Loan Scheme. Reconciliation of ECL movement to impairment charge/(release) for the period Stage 1 Stage 2 Stage 3 Total £m £m £m £m Retail mortgages (4) 4 (7) (7) Retail credit cards 5 (26) 883 862 Retail other (6) (5) 63 52 Corporate loans (36) (71) 170 63 ECL movements excluding disposals and write-offs 1 (41) (98) 1,109 970 ECL movement on loan commitments and other financial guarantees 13 (31) (12) (30) ECL movement on other financial assets 2 1 — 3 ECL movement on debt securities at amortised cost (1) (6) — (7) Recoveries and reimbursements 2 (31) 25 (50) (56) ECL charge on assets held for sale 44 Total exchange and other adjustments (27) Total income statement charge for the period 897 1 In H124, gross write-offs amounted to £760m (H123: £583m) and post write-off recoveries amounted to £38m (H123: £21m). Net write-offs represent gross write-offs less post write-off recoveries and amounted to £722m (H123: £562m). 2 Recoveries and reimbursements include £18m (H123 loss: £3m) for reimbursements expected to be received under the arrangement where 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 of £38m (H123: £21m). Loan commitments and financial guarantees Stage 1 Stage 2 Stage 3 Total Gross ECL Gross ECL Gross ECL Gross ECL Retail mortgages £m £m £m £m £m £m £m £m As at 1 January 2024 7,776 — 448 — 4 — 8,228 — Net transfers between stages (25) — 25 — — — — — Business activity in the period 6,279 — — — — — 6,279 — Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes (4,289) — (61) — (1) — (4,351) — Limit management and final repayments (165) — (20) — — — (185) — As at 30 June 2024 9,576 — 392 — 3 — 9,971 — Retail credit cards 1 As at 1 January 2024 144,791 59 2,807 54 142 — 147,740 113 Net transfers between stages (1,060) 27 1,026 (27) 34 — — — Business activity in the period 8,925 13 66 3 1 — 8,992 16 Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes 3,106 (24) (942) 18 (30) — 2,134 (6) Limit management and final repayments (5,851) (6) (252) (12) (8) — (6,111) (18) As at 30 June 2024 149,911 69 2,705 36 139 — 152,755 105 Retail other 1 As at 1 January 2024 8,607 6 535 2 44 — 9,186 8 Net transfers between stages (8) — 1 — 7 — — — Business activity in the period 497 1 84 — — — 581 1 Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes 11 (1) (46) (2) (1) — (36) (3) Limit management and final repayments (638) — (7) — (16) — (661) — As at 30 June 2024 8,469 6 567 — 34 — 9,070 6 Corporate loans As at 1 January 2024 212,889 108 20,418 231 847 44 234,154 383 Net transfers between stages 2,361 36 (2,503) (38) 142 2 — — Business activity in the period 48,341 19 2,365 20 72 — 50,778 39 Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes 4,879 (40) 541 43 (99) (9) 5,321 (6) Limit management and final repayments (46,322) (12) (4,537) (36) (104) (5) (50,963) (53) As at 30 June 2024 222,148 111 16,284 220 858 32 239,290 363 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 and geography below: Management adjustments to models for impairment allowance presented by product and geography 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 30.06.24 £m £m £m £m £m % Retail mortgages 50 42 128 170 220 77.3 Retail credit cards 643 45 (4) 41 684 6.0 Retail other 231 9 70 79 310 25.5 Corporate loans 683 55 23 78 761 10.2 Total UK 1,607 151 217 368 1,975 18.6 Retail mortgages 282 — (2) (2) 280 (0.7) Retail credit cards 3,065 — — — 3,065 — Retail other 28 — 2 2 30 6.7 Corporate loans 792 — 36 36 828 4.3 Total Rest of the World 4,167 — 36 36 4,203 0.9 Total 5,774 151 253 404 6,178 6.5 Debt securities at amortised cost 29 — (9) (9) 20 (45.0) Total including debt securities at amortised cost 5,803 151 244 395 6,198 6.4 As at 31.12.23 £m £m £m £m £m % Retail mortgages 54 57 121 178 232 76.7 Retail credit cards 700 45 (9) 36 736 4.9 Retail other 251 9 62 71 322 22.0 Corporate loans 761 71 10 81 842 9.6 Total UK 1,766 182 184 366 2,132 17.2 Retail mortgages 354 — (3) (3) 351 (0.9) Retail credit cards 2,855 — 8 8 2,863 0.3 Retail other 45 — (6) (6) 39 (15.4) Corporate loans 828 16 (4) 12 840 1.4 Total Rest of the World 4,082 16 (5) 11 4,093 0.3 Total 5,848 198 179 377 6,225 6.1 Debt securities at amortised cost 27 — — — 27 — Total including debt securities at amortised cost 5,875 198 179 377 6,252 6.0 Economic uncertainty adjustments presented by stage Stage 1 Stage 2 Stage 3 Total As at 30.06.24 £m £m £m £m Retail mortgages 8 25 9 42 Retail credit cards 8 37 — 45 Retail other 3 6 — 9 Corporate loans 35 8 12 55 Total UK 54 76 21 151 Retail mortgages — — — — Retail credit cards — — — — Retail other — — — — Corporate loans — — — — Total Rest of the World — — — — Total 54 76 21 151 As at 31.12.23 £m £m £m £m Retail mortgages 12 32 13 57 Retail credit cards 8 37 — 45 Retail other 3 6 — 9 Corporate loans 48 12 11 71 Total UK 71 87 24 182 Retail mortgages — — — — Retail credit cards — — — — Retail other — — — — Corporate loans 4 12 — 16 Total Rest of the World 4 12 — 16 Total 75 99 24 198 1 Positive values reflect an increase in impairment allowance and negative values reflect a reduction in the impairment allowance. 2 Includes £5.1bn (December 2023: £5.2bn) of modelled ECL, £0.5bn (December 2023: £0.4bn) of individually assessed impairments and £0.2bn (December 2023: £0.3bn) 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 Models have been developed with data from non-inflationary periods establishing a relationship between input variables and customer delinquency based on past behaviour. As such there is a risk that the modelled output fails to capture the appropriate response to changes in macroeconomic variables including high interest rates with modelled impairment provisions impacted by uncertainty. This uncertainty continues to be 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. Economic uncertainty adjustments have reduced during the period reflecting the updated macroeconomic outlook. The balance as at 30 June 2024 is £151m (December 2023: £198m) and includes: Customer and client uncertainty provisions of £129m (December 2023: £166m): • Retail mortgages (UK) £20m (December 2023: £25m): This adjustment reflects the risk of borrowers refinancing onto higher rates in the medium term and remains broadly stable compared to year-end. • Retail credit cards (UK) £45m (December 2023: £45m) and Retail other (UK) £9m (December 2023: £9m): These reflect adjustments applied to customers considered most vulnerable to affordability pressures in light of uncertainty linked to higher for longer interest rates and are unchanged from year-end. • Corporate loans: – UK £55m (December 2023: £71m): This adjustment reflects the possible cross default risk on Barclays’ lending in respect of clients who have taken bounce back loans and is partially reduced on account of the latest credit performance. – ROW £nil (December 2023: £16m): The previously held adjustment to provide for expected downside uncertainties on European Corporates has been retired following a resilient credit performance and updated macroeconomic outlook. Model uncertainty provisions of £22m (December 2023: £32m): • Retail mortgages (UK) £22m (December 2023: £32m): This adjustment remediates the higher recovery expectations impacted by model oversensitivity to certain macroeconomic variables and has reduced following the 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 £244m (December 2023: £179m) includes: Adjustments for definition of default (DOD) under the Capital Requirements Regulation and model monitoring in Retail mortgages, Retail other and Corporate loans. • Retail mortgages (UK) £128m (December 2023: £121m): The increase reflects re-sizing of the DOD adjustment informed by credit performance. • Retail other (UK) £70m (December 2023: £62m): The increase reflects re-sizing of model monitoring and operational adjustments in the UK and PBWM portfolio. • Corporate loans: – UK £23m (December 2023: £10m): The movement reflects the reduction of an adjustment to remediate conservative modelled recovery expectations in the ESHLA portfolio. This reduction has been partially offset by the re-sizing of DOD and model monitoring adjustments in SME lending. – ROW £36m (December 2023: £(4)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 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 44 The following tables 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 30.06.24 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. As at 31.12.23 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

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 the Disclosure Guidance and Transparency Rules (DTR) of the UK’s FCA, and IAS 34, Interim Financial Reporting, as published by the International Accounting Standards Board (IASB) and adopted by the UK. 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 international accounting standards in conformity with the requirements of the Companies Act 2006 and in accordance with International Financial Reporting Standards (IFRS) and interpretations (IFRICs) as issued by the IASB and adopted by the UK. The accounting policies and methods of computation used in these condensed consolidated interim financial statements are the same as those used in the Barclays PLC Annual Report for the financial year ended 31 December 2023. 1. Going concern The financial statements are prepared on a going concern basis, as the Directors are satisfied that the 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 and includes a review of a working capital report (WCR). The WCR is used by the Directors to assess the future performance of the business and that it has the resources in place that are required to meet its ongoing regulatory requirements. The WCR also includes an assessment of the impact of internally generated stress testing scenarios on the liquidity and capital requirement forecasts. The stress tests used were based upon an assessment of reasonably possible downside economic scenarios that the Group could experience. The WCR indicated that the 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 32 51

Segmental reporting

Segmental reporting	6 Months Ended
	Jun. 30, 2024
Disclosure of operating segments [abstract]
Segmental reporting	Segmental reporting Analysis of results by business Barclays UK Barclays UK Corporate Bank Barclays Private Bank and Wealth Management Barclays Investment Bank Barclays US Consumer Bank Head Office Barclays Group Half year ended 30.06.24 £m £m £m £m £m £m £m Net interest income 3,146 573 362 465 1,334 248 6,128 Non-interest income/(expense) 567 304 270 5,882 344 (218) 7,149 Total income 3,713 877 632 6,347 1,678 30 13,277 Operating costs (2,048) (456) (434) (3,858) (796) (406) (7,997) UK regulatory levies 1 (54) (30) (3) (33) — — (120) Litigation and conduct (6) — 1 (11) (4) (43) (64) Total operating expenses (2,108) (486) (436) (3,902) (800) (449) (8,181) Other net income 2 — — — — — 16 16 Profit/(loss) before impairment 1,605 391 196 2,445 878 (403) 5,112 Credit impairment (charges)/ releases (66) (23) 3 (34) (719) (58) (897) Profit/(loss) before tax 1,539 368 199 2,411 159 (461) 4,215 As at 30.06.24 £bn £bn £bn £bn £bn £bn £bn Total assets 293.0 64.0 35.8 1,113.8 32.1 37.9 1,576.6 Total liabilities 262.5 86.4 65.2 997.1 21.5 72.1 1,504.8 Barclays UK Barclays UK Corporate Bank Barclays Private Bank and Wealth Management Barclays Investment Bank Barclays US Consumer Bank Head Office Barclays Group Half year ended 30.06.23 £m £m £m £m £m £m £m Net interest income 3,278 609 367 714 1,256 99 6,323 Non-interest income 644 326 191 5,598 337 103 7,199 Total income 3,922 935 558 6,312 1,593 202 13,522 Operating costs (2,182) (423) (326) (3,845) (828) (425) (8,030) UK regulatory levies 1 — — — — — — — Litigation and conduct 3 — — 1 (4) (33) (32) Total operating expenses (2,179) (423) (326) (3,844) (832) (458) (8,062) Other net income/(expenses) 2 — 2 — (1) — (3) (2) Profit/(loss) before impairment 1,743 514 232 2,467 761 (259) 5,458 Credit impairment (charges)/releases (208) 60 (10) (102) (585) (51) (896) Profit/(loss) before tax 1,535 574 222 2,365 176 (310) 4,562 As at 31.12.23 £bn £bn £bn £bn £bn £bn £bn Total assets 293.1 61.5 32.0 1,019.1 33.6 38.2 1,477.5 Total liabilities 264.2 85.9 60.9 904.5 21.1 69.0 1,405.6 Prior period segmental comparators shown in this document were re-presented in the 2023 Results Resegmentation Document, which may be accessed via the Barclays website at: home.barclays/investor-relations 1 Comprises the impact of the BoE levy scheme and the UK bank levy. 2 Other net income/(expenses) represents the share of post-tax results of associates and joint ventures, profit (or loss) on disposal of subsidiaries, associates and joint ventures and gains on acquisitions. Split of income by geographic region 1 Half year ended 30.06.24 Half year ended 30.06.23 £m £m United Kingdom 6,829 7,312 Europe 1,180 1,265 Americas 4,574 4,187 Africa and Middle East 39 42 Asia 655 716 Total 13,277 13,522 1 The geographical analysis is based on the location of the office where the transactions are recorded.

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 Barclays UK Corporate Bank Barclays Private Bank and Wealth Management Barclays Investment Bank Barclays US consumer Bank Head Office Barclays Group Half year ended 30.06.24 £m £m £m £m £m £m £m Fee type Transactional 551 232 16 171 1,320 171 2,461 Advisory — — 156 325 — — 481 Brokerage and execution 107 — 62 776 — — 945 Underwriting and syndication 17 46 — 1,391 — — 1,454 Other 13 — — — — 6 19 Total revenue from contracts with customers 688 278 234 2,663 1,320 177 5,360 Other non-contract fee income — 11 — 58 — — 69 Fee and commission income 688 289 234 2,721 1,320 177 5,429 Fee and commission expense (177) (43) (19) (516) (893) (43) (1,691) Net fee and commission income 511 246 215 2,205 427 134 3,738 Barclays UK Barclays UK Corporate Bank Barclays Private Bank and Wealth Management Barclays Investment Bank Barclays US consumer Bank Head Office Barclays Group Half year ended 30.06.23 £m £m £m £m £m £m £m Fee type Transactional 560 212 13 160 1,290 152 2,387 Advisory 57 — 94 363 — — 514 Brokerage and execution 122 — 44 998 — — 1,164 Underwriting and syndication — 39 — 997 — — 1,036 Other 27 1 1 11 5 37 82 Total revenue from contracts with customers 766 252 152 2,529 1,295 189 5,183 Other non-contract fee income — 15 3 56 — — 74 Fee and commission income 766 267 155 2,585 1,295 189 5,257 Fee and commission expense (188) (47) (14) (740) (870) (39) (1,898) Net fee and commission income 578 220 141 1,845 425 150 3,359 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.

Staff costs

Staff costs	6 Months Ended
	Jun. 30, 2024
Classes of employee benefits expense [abstract]
Staff costs	Staff costs Half year ended 30.06.24 Half year ended 30.06.23 Compensation costs £m £m Upfront bonus charge 675 665 Deferred bonus charge 269 263 Other incentives 35 42 Performance costs 979 970 Salaries 2,491 2,540 Social security costs 395 399 Post-retirement benefits 296 268 Other compensation costs 282 281 Total compensation costs 4,443 4,458 Other resourcing costs Outsourcing 299 340 Redundancy and restructuring 138 63 Temporary staff costs 31 53 Other 53 71 Total other resourcing costs 521 527 Total staff costs 4,964 4,985 Barclays Group compensation costs as a % of total income 33.5% 33.0%

Infrastructure, administration

Infrastructure, administration and general expenses	6 Months Ended
	Jun. 30, 2024
Expenses by nature [abstract]
Infrastructure, administration and general expenses	Infrastructure, administration and general expenses Half year ended 30.06.24 Half year ended 30.06.23 Infrastructure costs £m £m Property and equipment 857 857 Depreciation and amortisation 843 902 Impairment of property, equipment and intangible assets 4 18 Total infrastructure costs 1,704 1,777 Administration and general expenses Consultancy, legal and professional fees 388 336 Marketing and advertising 308 288 Other administration and general expenses 633 644 Total administration and general expenses 1,329 1,268 Total infrastructure, administration and general expenses 3,033 3,045

Earnings per share

Earnings per share	6 Months Ended
	Jun. 30, 2024
Earnings per share [abstract]
Earnings per share	Earnings per share Half year ended 30.06.24 Half year ended 30.06.23 £m £m Profit attributable to ordinary equity holders of the parent 2,787 3,111 m m Basic weighted average number of shares in issue 14,972 15,645 Number of potential ordinary shares 445 470 Diluted weighted average number of shares 15,417 16,115 p p Basic earnings per ordinary share 18.6 19.9 Diluted earnings per ordinary share 18.1 19.3

Dividends on ordinary shares

Dividends on ordinary shares	6 Months Ended
	Jun. 30, 2024
Dividends [Abstract]
Dividends on ordinary shares	Dividends on ordinary shares Half year ended 30.06.24 Half year ended 30.06.23 Per share Total Per share Total Dividends paid during the period p £m p £m Full year dividend paid during period 5.30 796 5.00 793 It is Barclays' policy to declare and pay dividends on a semi-annual basis. The 2023 full year dividend of 5.3p per ordinary share was paid on 3 April 2024 to the shareholders on the Share Register on 1 March 2024. A half year dividend for 2024 of 2.9p (H123: 2.7p) per ordinary share will be paid on 20 September 2024. For qualifying American Depositary Receipt (ADR) holders, the half year dividend of 2.9p per ordinary share becomes 11.6p per American Depositary Share (ADS) (representing four shares). The depositary bank will post the half year dividend on 20 September 2024 to ADR holders on the record at close of business on 16 August 2024. The Directors have confirmed their intention to initiate a share buyback of up to £750m after the balance sheet date. The share buyback is expected to commence in the third quarter of 2024. The financial statements for the six months ended 30 June 2024 do not reflect the impact of the proposed share buyback, which will be accounted for as and when shares are repurchased by the Company.

Derivative financial instrument

Derivative financial instruments	6 Months Ended
	Jun. 30, 2024
Disclosure of nature and extent of risks arising from financial instruments [abstract]
Derivative financial instruments	Derivative financial instruments Contract notional amount Fair value Assets Liabilities As at 30.06.24 £m £m £m Foreign exchange derivatives 7,727,915 78,912 (72,582) Interest rate derivatives 73,107,979 102,047 (89,954) Credit derivatives 1,533,970 6,449 (7,169) Equity and stock index and commodity derivatives 3,091,961 63,339 (71,790) Derivative assets/(liabilities) held for trading 85,461,825 250,747 (241,495) Derivatives in hedge accounting relationships Derivatives designated as cash flow hedges 145,884 2,738 (75) Derivatives designated as fair value hedges 156,031 122 (549) Derivatives designated as hedges of net investments 4,152 7 (17) Derivative assets/(liabilities) designated in hedge accounting relationships 306,067 2,867 (641) Total recognised derivative assets/(liabilities) 85,767,892 253,614 (242,136) As at 31.12.23 Foreign exchange derivatives 6,740,828 87,518 (83,225) Interest rate derivatives 54,134,591 109,431 (97,427) Credit derivatives 1,448,350 7,662 (8,630) Equity and stock index and commodity derivatives 2,669,722 50,032 (60,176) Derivative assets/(liabilities) held for trading 64,993,491 254,643 (249,458) Derivatives in hedge accounting relationships Derivatives designated as cash flow hedges 157,817 1,904 (8) Derivatives designated as fair value hedges 138,015 178 (533) Derivatives designated as hedges of net investments 3,744 111 (45) Derivative assets/(liabilities) designated in hedge accounting relationships 299,576 2,193 (586) Total recognised derivative assets/(liabilities) 65,293,067 256,836 (250,044) The IFRS netting posted against derivative assets was £51bn including £9bn of cash collateral netted (December 2023: £56bn including £8bn cash collateral netted) and £51bn for liabilities including £10bn of cash collateral netted (December 2023: £54bn including £9bn of cash collateral netted). Derivative asset exposures would be £227bn (December 2023: £230bn) lower than reported under IFRS if netting were permitted for assets and liabilities with the same counterparty or for which the Group holds cash collateral of £32bn (December 2023: £31bn). Similarly, derivative liabilities would be £218bn (December 2023: £223bn) lower reflecting counterparty netting and cash collateral placed of £23bn (December 2023: £24bn). In addition, non-cash collateral of £11bn (December 2023: £10bn) was held in respect of derivative assets £4bn (December 2023: £4bn) was placed in respect of derivative liabilities. Collateral amounts are limited to net on balance sheet exposure so as to not include over-collateralisation.

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 17, Fair value of financial instruments of the Barclays 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 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 98,992 89,588 8,726 197,306 Financial assets at fair value through the income statement 7,502 198,187 9,517 215,206 Derivative financial instruments 86 250,695 2,833 253,614 Financial assets at fair value through other comprehensive income 32,151 48,142 2,454 82,747 Investment property — — 1 1 Total assets 138,731 586,612 23,531 748,874 Trading portfolio liabilities (33,309) (25,621) (385) (59,315) Financial liabilities designated at fair value (182) (318,283) (2,492) (320,957) Derivative financial instruments (66) (237,735) (4,335) (242,136) Total liabilities (33,557) (581,639) (7,212) (622,408) As at 31.12.23 Trading portfolio assets 94,658 73,438 6,509 174,605 Financial assets at fair value through the income statement 5,831 192,571 8,249 206,651 Derivative financial instruments 107 253,189 3,540 256,836 Financial assets at fair value through other comprehensive income 30,247 40,511 1,078 71,836 Investment property — — 2 2 Total assets 130,843 559,709 19,378 709,930 Trading portfolio liabilities (29,274) (29,027) (368) (58,669) Financial liabilities designated at fair value (117) (296,200) (1,222) (297,539) Derivative financial instruments (81) (245,310) (4,653) (250,044) Total liabilities (29,472) (570,537) (6,243) (606,252) The following table shows the 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 1,623 (1,538) 2,211 (1,701) Foreign exchange derivatives 175 (118) 111 (91) Credit derivatives 216 (798) 241 (820) Equity derivatives 819 (1,881) 977 (2,041) Issued debt — (1,539) — (637) Corporate debt 2,261 (353) 1,867 (352) Reverse repurchase and repurchase agreements 620 (934) 209 (517) Loans 12,932 — 10,614 — Asset backed securities 2,145 (2) 603 — Private equity investments 1,128 (18) 1,375 (10) Other 1 1,612 (31) 1,170 (74) Total 23,531 (7,212) 19,378 (6,243) 1 Other includes funds and fund-linked products, Government and Government sponsored debt, equity 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 31 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 Total gains and (losses) in the period recognised in the income statement Total gains or (losses) recognised in OCI Transfers As at 01.01.24 Purchases Sales Issues Settle-ments Trading income Other income In Out As at 30.06.24 £m £m £m £m £m £m £m £m £m £m £m Corporate debt 681 831 (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 1,041 765 (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 888 — (2) — — 13 7 — — — 906 Loans 5,612 1,760 (999) — (344) (36) 18 — 139 (70) 6,080 Private equity investments 1,371 112 (482) — (17) 3 140 — — (3) 1,124 Reverse repurchase and repurchase agreements 209 297 — — — — — — 141 (27) 620 Asset backed securities 85 590 (1) — (12) 1 — — 9 (14) 658 Other 84 45 — — (7) — 9 — 2 (4) 129 Financial assets at fair value through the income statement 8,249 2,804 (1,484) — (380) (19) 174 — 291 (118) 9,517 Corporate debt 298 — — — — — — — — (248) 50 Loans 533 1,097 — — — 1 11 — — — 1,642 Private equity investments 4 — — — — — — — — — 4 Asset backed securities 200 757 — — — — — — — (200) 757 Other 43 — (42) — — — — — — — 1 Assets at fair value through other comprehensive income 1,078 1,854 (42) — — 1 11 — — (448) 2,454 Investment property 2 — (1) — — — — — — — 1 Trading portfolio liabilities (368) (24) 17 — — 18 — — (34) 6 (385) Financial liabilities designated at fair value (1,222) (6) 28 (627) 16 (27) (21) — (881) 248 (2,492) Interest rate derivatives 510 10 — — (135) (158) — — 31 (173) 85 Foreign exchange derivatives 20 (1) (1) — 19 6 — — 21 (7) 57 Credit derivatives (579) 5 33 — — (22) — — (22) 3 (582) Equity derivatives (1,064) (196) — (19) (53) (7) — — (9) 286 (1,062) Net derivative financial instruments 1 (1,113) (182) 32 (19) (169) (181) — — 21 109 (1,502) Total 13,135 7,559 (2,457) (646) (1,247) (215) 164 — 443 (417) 16,319 1 Derivative financial instruments are presented on a net basis. On a gross basis, derivative financial assets were £2,833m and derivative financial liabilities were £(4,335)m. Level 3 movement analysis As at 01.01.23 Purchases Sales Issues Settle- 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 Trading income Other income In Out £m £m £m £m £m £m £m £m £m £m £m Corporate debt 597 336 (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 871 706 (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 6,396 1,837 (823) — (771) (57) (42) — 50 (114) 6,476 Private equity investments 1,284 50 (22) — (3) (50) 14 — 2 — 1,275 Reverse repurchase and repurchase agreements 38 — — — — (11) — — 46 (29) 44 Asset backed securities 192 10 (4) — — (13) — — 21 (16) 190 Other 136 — (8) — (21) (2) (9) — 1 — 97 Financial assets at fair value through the income statement 9,125 1,897 (977) — (795) (153) (40) — 120 (159) 9,018 Corporate debt — 13 — — — — — — 46 — 59 Loans — 47 — — — — — — — — 47 Private equity investments 7 — — — — — — (2) — — 5 Asset backed securities 3 — — — (1) — — — — — 2 Other 1 — — — — — — — — — 1 Assets at fair value through other comprehensive income 11 60 — — (1) — — (2) 46 — 114 Investment property 5 — — — — — (3) — — — 2 Trading portfolio liabilities (56) (16) 4 — — 15 — — (8) 9 (52) Financial liabilities designated at fair value (1,050) — — (226) — 4 (1) — (290) 463 (1,100) Interest rate derivatives (496) 2 — — 19 (35) — — 544 446 480 Foreign exchange derivatives 39 — — — — (31) — — 12 (15) 5 Credit derivatives (313) (191) 5 — 66 13 — — 52 16 (352) Equity derivatives (419) (90) — — (132) (135) — — (104) 12 (868) Net derivative financial instruments 1 (1,189) (279) 5 — (47) (188) — — 504 459 (735) Total 13,326 3,947 (2,844) (226) (1,245) (356) (44) (2) 1,394 96 14,046 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 1 47 — 48 (144) (40) — (184) Financial assets at fair value through other comprehensive income 1 11 — 12 — — (2) (2) Investment properties — — — — — (3) — (3) Trading portfolio liabilities 17 — — 17 15 — — 15 Financial liabilities designated at fair value (29) (10) — (39) 2 (1) — 1 Net derivative financial instruments (180) — — (180) (186) — — (186) Total (192) 48 — (144) (348) (44) (2) (394) 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 17, Fair value of financial instruments in the Barclays 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 687 32 (851) (32) 612 2 (801) (2) Private equity investments 215 — (215) — 263 1 (263) (1) Asset Backed Securities 39 4 (29) (4) 36 1 (27) (1) Other 1 95 — (108) — 90 — (91) — Total 1,409 36 (1,718) (36) 1,286 4 (1,629) (4) 1 Other includes, Equity Cash Products, Fund and Fund Linked, Government and Government Sponsored Debt, Issued debt. 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 £1,445m (December 2023: £1,290m) or to decrease fair values by up to £1,754m (December 2023: £1,633m) 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 Note 17, Fair value of financial instruments in the Barclays 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 (510) (569) 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 £59m to £(510)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 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 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 has 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 £218m (December 2023: £205m) for financial instruments measured at fair value and £187m (December 2023: £192m) for financial instruments carried at amortised cost. There are additions and FX gains of £85m (December 2023: £136m FX loss) and amortisation and releases of £72m (December 2023: £57m) in amounts attributable to financial instruments measured at fair value and additions of £nil (December 2023: £nil) and amortisation and releases of £5m (December 2023: £24m) in amounts attributable to financial instruments measured at amortised cost. Third party credit enhancements Structured and brokered certificates of deposit issued by the 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 Barclays 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 fair values for assets and liabilities not held at fair value Valuation methodologies employed in calculating the fair value of financial assets and liabilities measured at amortised cost are consistent with those described within Note 17, Fair value of financial instruments in the Barclays PLC Annual Report 2023. The following table summarises the fair value of financial assets and liabilities measured at amortised cost on the 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 61,700 60,738 56,749 55,437 Loans and advances at amortised cost 337,809 333,405 342,747 334,706 Reverse repurchase agreements and other similar secured lending 4,724 4,724 2,594 2,594 Financial liabilities Deposits at amortised cost (557,452) (557,528) (538,789) (538,502) Repurchase agreements and other similar secured borrowing (52,352) (52,352) (41,601) (41,601) Debt securities in issue (96,772) (98,656) (96,825) (98,123) Subordinated liabilities (11,795) (12,242) (10,494) (10,803)

Goodwill and intangible assets

Goodwill and intangible assets	6 Months Ended
	Jun. 30, 2024
Intangible assets and goodwill [abstract]
Goodwill and intangible assets	Goodwill and intangible assetsThe Group performed an impairment review to assess the recoverability of its goodwill and intangible asset balances as at 31 December 2023. The outcome of this review is disclosed on pages 464-467 of the Barclays PLC Annual Report 2023. No impairment was recognised as a result of the review as value in use exceeded carrying amount. A review of the Group's goodwill and intangible assets as at 30 June 2024 did not identify any factors indicating impairment.

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 10,494 11,423 Issuances 1,355 1,523 Redemptions — (2,239) Other (54) (213) Closing balance 11,795 10,494 Issuances of £1,355m comprise £1,276m EUR 4.973% Fixed Rate Resetting Tier 2 Subordinated Callable Notes issued externally by Barclays PLC and £79m USD Floating Rate Notes issued externally by a Barclays subsidiary. 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 204 295 Legal, competition and regulatory matters 95 99 Redundancy and restructuring 241 397 Undrawn contractually committed facilities and guarantees 474 504 Sundry provisions 278 289 Total 1,292 1,584

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 Group’s IAS 19 net retirement benefit assets were £3.3bn (December 2023: £3.4bn). The UK Retirement Fund (UKRF), which is the 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 3,587 3,671 Fair value through other comprehensive income reserve (1,635) (1,366) Cash flow hedging reserve (3,797) (3,707) Own credit reserve (702) (240) Other reserves and treasury shares 1,665 1,565 Total (882) (77) Currency translation reserve The currency translation reserve represents the cumulative gains and losses on the retranslation of the Group’s net investment in foreign operations, net of the effects of hedging. As at 30 June 2024, there was a cumulative gain of £3,587m (December 2023: £3,671m gain) in the currency translation reserve, a loss during the period of £84m (2023: loss of £1,101m) inclusive of tax credit of £4m (2023: £9m). This principally reflects the appreciation of GBP against EUR and JPY offset by GBP depreciating against USD during H1 2024, in contrast to the strengthening of GBP against USD and EUR during 2023. Fair value through other comprehensive income reserve The fair value through other comprehensive income reserve represents the total of 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 £1,635m (December 2023: £1,366m loss) in the reserve. The loss during the period of £269m (2023: £194m gain) was principally driven by a £185m loss (2023: £299m gain) from the movement in fair value of bonds due to change in bond yields and a net gain of £186m transferred to the income statement (2023: £26m gain) and tax credit of £101m (2023: tax charge of £78m). 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 £3,797m (December 2023: £3,707m loss) in the cash flow hedging reserve. The £90m loss in the period (2023: £3,528m gain) is driven by a £1,057m loss (2023: £3,120m gain) from fair value movements on interest rate swaps as major interest rate forward curves increased (2023: decreased), this was offset by £939m of accumulated losses transferred to the income statement (2023: £1,750m losses) and a tax benefit of £28m (2023: tax charge of £1,342m). 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, the loss of £462m during the period (2023: loss of £707m) principally reflects a £635m loss (2023: loss of £983m) from the tightening of credit spreads partially offset by tax credit of £173m (2023: tax credit of £273m). Other reserves and treasury shares Other reserves relate to redeemed ordinary and preference shares issued by the Group. Treasury shares relate to Barclays PLC shares held principally in relation to the Group’s various share schemes. As at 30 June 2024, there was a cumulative gain of £1,665m (December 2023: £1,565m gain). This principally reflects an increase of £97m (December 2023: increase of £209m) due to the repurchase of 389m shares (December 2023: 837m) as part of the share buybacks conducted in 2024 followed by £3m gain (December 2023: £8m loss) on account of decrease in treasury shares balance held in relatio

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 17,052 17,353 Performance guarantees, acceptances and endorsements 8,434 7,987 Total 25,486 25,340 Commitments Documentary credits and other short-term trade related transactions 2,489 2,352 Standby facilities, credit lines and other commitments 402,361 388,085 Total 404,850 390,437 Further details on contingent liabilities, where it is not practicable to disclose an estimate of the potential financial effect on Barclays relating to legal and competition and regulatory matters can be found in Note 16.

Legal, competition and regulato

Legal, competition and regulatory matters	6 Months Ended
	Jun. 30, 2024
Legal, Competition And Regulatory Matters [Abstract]
Legal, competition and regulatory matters	Legal, competition and regulatory matters The 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 12, Provisions. We have not disclosed an estimate of the potential financial impact or effect on the 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 Group’s potential financial exposure in respect of those matters. Matters are ordered under headings corresponding to the financial statements in which they are disclosed. 1. Barclays PLC and Barclays Bank PLC 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 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 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 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 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 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 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 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 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 Serviced 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. 2. Barclays PLC, Barclays Bank PLC and Barclays Bank UK PLC 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. 3. Barclays PLC Civil action in respect of Barclays’ statements regarding the relationship between its former CEO and Jeffrey Epstein In 2023, a purported class action was filed in federal court in California against Barclays PLC and a number of current and former members of the Board of Directors of Barclays PLC. The complaint seeks to hold the defendants 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 Barclays’ public disclosures relating to its former CEO’s relationship with Jeffrey Epstein. Alternative trading systems In 2020, a claim was brought against Barclays PLC in the UK in the High Court by various shareholders regarding Barclays PLC’s share price based on the allegations contained within a complaint by the New York State Attorney General (NYAG) in 2014, which alleged, among other things, that Barclays PLC and BCI engaged in fraud and deceptive practices in connection with LX, BCI’s SEC-registered alternative trading system. The NYAG claim was settled in 2016, as previously disclosed. The more recent claim is currently due to go to trial on liability in October 2025 with a later trial to decide quantum issues. Barclays is defending the claim. General The 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 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 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 Group is or has been engaged. The 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, Barclays PLC does not expect the ultimate resolution of any of these other matters to have a material adverse effect on the Group’s 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 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 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 the performance of the Group during this period.

Credit Risk (Tables)

Credit Risk (Tables)	6 Months Ended
	Jun. 30, 2024
Disclosure of credit risk exposure [abstract]
Disclosure of loans and advances at amortised cost by geography and 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 and geographical breakdown by stages of loans and advances at amortised cost and the impairment allowance. Also included are stage allocation of debt securities and off-balance sheet loan commitments and financial guarantee contracts 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. Gross exposure Impairment allowance Stage 1 Stage 2 Stage 3 Total Stage 1 Stage 2 Stage 3 Total As at 30.06.24 £m £m £m £m £m £m £m £m Retail mortgages 142,023 20,811 1,691 164,525 39 80 101 220 Retail credit cards 8,673 2,021 194 10,888 109 459 95 663 Retail other 6,773 1,181 236 8,190 51 112 142 305 Corporate loans 1 50,913 8,266 1,525 60,704 159 184 327 670 Total UK 208,382 32,279 3,646 244,307 358 835 665 1,858 Retail mortgages 1,570 37 510 2,117 2 — 278 280 Retail credit cards 21,766 3,325 1,844 26,935 399 1,075 1,507 2,981 Retail other 1,618 131 162 1,911 2 1 26 29 Corporate loans 63,197 4,054 992 68,243 91 158 307 556 Total Rest of the World 88,151 7,547 3,508 99,206 494 1,234 2,118 3,846 Total loans and advances at amortised cost 296,533 39,826 7,154 343,513 852 2,069 2,783 5,704 Debt securities at amortised cost 58,088 3,632 — 61,720 10 10 — 20 Total loans and advances at amortised cost including debt securities 354,621 43,458 7,154 405,233 862 2,079 2,783 5,724 Off-balance sheet loan commitments and financial guarantee contracts 2 390,104 19,948 1,034 411,086 186 256 32 474 Total 3,4 744,725 63,406 8,188 816,319 1,048 2,335 2,815 6,198 Net exposure Coverage ratio Stage 1 Stage 2 Stage 3 Total Stage 1 Stage 2 Stage 3 Total As at 30.06.24 £m £m £m £m % % % % Retail mortgages 141,984 20,731 1,590 164,305 — 0.4 6.0 0.1 Retail credit cards 8,564 1,562 99 10,225 1.3 22.7 49.0 6.1 Retail other 6,722 1,069 94 7,885 0.8 9.5 60.2 3.7 Corporate loans 1 50,754 8,082 1,198 60,034 0.3 2.2 21.4 1.1 Total UK 208,024 31,444 2,981 242,449 0.2 2.6 18.2 0.8 Retail mortgages 1,568 37 232 1,837 0.1 — 54.5 13.2 Retail credit cards 21,367 2,250 337 23,954 1.8 32.3 81.7 11.1 Retail other 1,616 130 136 1,882 0.1 0.8 16.0 1.5 Corporate loans 63,106 3,896 685 67,687 0.1 3.9 30.9 0.8 Total Rest of the World 87,657 6,313 1,390 95,360 0.6 16.4 60.4 3.9 Total loans and advances at amortised cost 295,681 37,757 4,371 337,809 0.3 5.2 38.9 1.7 Debt securities at amortised cost 58,078 3,622 — 61,700 — 0.3 — — Total loans and advances at amortised cost including debt securities 353,759 41,379 4,371 399,509 0.2 4.8 38.9 1.4 Off-balance sheet loan commitments and financial guarantee contracts 2 389,918 19,692 1,002 410,612 — 1.3 3.1 0.1 Total 3,4 743,677 61,071 5,373 810,121 0.1 3.7 34.4 0.8 1 Includes Business Banking, which has a gross exposure of £14.1bn and an impairment allowance of £367m. This comprises £79m impairment allowance on £9.6bn Stage 1 exposure, £53m on £3.3bn Stage 2 exposure and £235m on £1.2bn Stage 3 exposure. Excluding this, total coverage for corporate loans in UK is 0.7%. 2 Excludes loan commitments and financial guarantees of £19.3bn carried at fair value and includes exposures relating to financial assets classified as assets held for sale. 3 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 £228.4bn and an impairment allowance of £154m. This comprises £18m impairment allowance on £227.2bn Stage 1 exposure, £3m on £1.1bn Stage 2 exposure and £133m on £140m Stage 3 exposure. 4 The annualised loan loss rate is 45bps after applying the total impairment charge of £897m. Gross exposure Impairment allowance Stage 1 Stage 2 Stage 3 Total Stage 1 Stage 2 Stage 3 Total As at 31.12.23 £m £m £m £m £m £m £m £m Retail mortgages 146,001 19,123 1,812 166,936 43 77 112 232 Retail credit cards 8,094 2,128 198 10,420 111 492 107 710 Retail other 6,832 1,252 264 8,348 56 117 144 317 Corporate loans 1 54,257 8,673 1,692 64,622 191 214 346 751 Total UK 215,184 31,176 3,966 250,326 401 900 709 2,010 Retail mortgages 4,201 346 612 5,159 7 28 316 351 Retail credit cards 22,315 3,450 1,522 27,287 412 1,138 1,226 2,776 Retail other 1,637 91 229 1,957 3 1 32 36 Corporate loans 58,248 4,629 862 63,739 96 200 252 548 Total Rest of the World 86,401 8,516 3,225 98,142 518 1,367 1,826 3,711 Total loans and advances at amortised cost 301,585 39,692 7,191 348,468 919 2,267 2,535 5,721 Debt securities 52,869 3,907 — 56,776 11 16 — 27 Total loans and advances at amortised cost including debt securities 354,454 43,599 7,191 405,244 930 2,283 2,535 5,748 Off-balance sheet loan commitments and financial guarantee contracts 2 374,063 24,208 1,037 399,308 173 287 44 504 Total 3,4 728,517 67,807 8,228 804,552 1,103 2,570 2,579 6,252 Net exposure Coverage ratio Stage 1 Stage 2 Stage 3 Total Stage 1 Stage 2 Stage 3 Total As at 31.12.23 £m £m £m £m % % % % Retail mortgages 145,958 19,046 1,700 166,704 — 0.4 6.2 0.1 Retail credit cards 7,983 1,636 91 9,710 1.4 23.1 54.0 6.8 Retail other 6,776 1,135 120 8,031 0.8 9.3 54.5 3.8 Corporate loans 1 54,066 8,459 1,346 63,871 0.4 2.5 20.4 1.2 Total UK 214,783 30,276 3,257 248,316 0.2 2.9 17.9 0.8 Retail mortgages 4,194 318 296 4,808 0.2 8.1 51.6 6.8 Retail credit cards 21,903 2,312 296 24,511 1.8 33.0 80.6 10.2 Retail other 1,634 90 197 1,921 0.2 1.1 14.0 1.8 Corporate loans 58,152 4,429 610 63,191 0.2 4.3 29.2 0.9 Total Rest of the World 85,883 7,149 1,399 94,431 0.6 16.1 56.6 3.8 Total loans and advances at amortised cost 300,666 37,425 4,656 342,747 0.3 5.7 35.3 1.6 Debt securities 52,858 3,891 — 56,749 — 0.4 — — Total loans and advances at amortised cost including debt securities 353,524 41,316 4,656 399,496 0.3 5.2 35.3 1.4 Off-balance sheet loan commitments and financial guarantee contracts 2 373,890 23,921 993 398,804 — 1.2 4.2 0.1 Total 3,4 727,414 65,237 5,649 798,300 0.2 3.8 31.3 0.8 1 Includes Business Banking, which has a gross exposure of £15.2bn and an impairment allowance of £431m. This comprises £99m impairment allowance on £9.8bn Stage 1 exposure, £81m on £4.1bn Stage 2 exposure and £251m on £1.3bn Stage 3 exposure. Excluding this, total coverage for corporate loans in UK is 0.6%. 2 Excludes loan commitments and financial guarantees of £16.5bn carried at fair value and includes exposures relating to financial assets classified as assets held for sale. 3 Other financial assets subject to impairment not included 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 £183.6bn and impairment allowance of £151m. This comprises £16m impairment allowance on £182.8bn Stage 1 exposure, £2m on £0.6bn Stage 2 exposure and £133m on £140m Stage 3 exposure. 4 The annualised loan loss rate is 46bps after applying the total impairment charge of £1,881m. Loans and advances at amortised cost by product The table below presents a product breakdown by stages of loans and advances at amortised cost. Also included is a breakdown of Stage 2 past due balances. Stage 2 As at 30.06.24 Stage 1 Not past due <=30 days past due >30 days past due Total Stage 3 Total Gross exposure £m £m £m £m £m £m £m Retail mortgages 143,593 17,979 2,054 815 20,848 2,201 166,642 Retail credit cards 30,439 4,685 367 294 5,346 2,038 37,823 Retail other 8,391 1,065 106 141 1,312 398 10,101 Corporate loans 114,110 12,017 57 246 12,320 2,517 128,947 Total 296,533 35,746 2,584 1,496 39,826 7,154 343,513 Impairment allowance Retail mortgages 41 44 16 20 80 379 500 Retail credit cards 508 1,191 160 183 1,534 1,602 3,644 Retail other 53 78 17 18 113 168 334 Corporate loans 250 327 7 8 342 634 1,226 Total 852 1,640 200 229 2,069 2,783 5,704 Net exposure Retail mortgages 143,552 17,935 2,038 795 20,768 1,822 166,142 Retail credit cards 29,931 3,494 207 111 3,812 436 34,179 Retail other 8,338 987 89 123 1,199 230 9,767 Corporate loans 113,860 11,690 50 238 11,978 1,883 127,721 Total 295,681 34,106 2,384 1,267 37,757 4,371 337,809 Coverage ratio % % % % % % % Retail mortgages — 0.2 0.8 2.5 0.4 17.2 0.3 Retail credit cards 1.7 25.4 43.6 62.2 28.7 78.6 9.6 Retail other 0.6 7.3 16.0 12.8 8.6 42.2 3.3 Corporate loans 0.2 2.7 12.3 3.3 2.8 25.2 1.0 Total 0.3 4.6 7.7 15.3 5.2 38.9 1.7 As at 31.12.23 Gross exposure £m £m £m £m £m £m £m Retail mortgages 150,202 16,834 1,971 664 19,469 2,424 172,095 Retail credit cards 30,409 4,858 392 328 5,578 1,720 37,707 Retail other 8,469 1,094 126 123 1,343 493 10,305 Corporate loans 112,505 12,960 179 163 13,302 2,554 128,361 Total 301,585 35,746 2,668 1,278 39,692 7,191 348,468 Impairment allowance Retail mortgages 50 73 20 12 105 428 583 Retail credit cards 523 1,257 166 207 1,630 1,333 3,486 Retail other 59 82 18 18 118 176 353 Corporate loans 287 399 8 7 414 598 1,299 Total 919 1,811 212 244 2,267 2,535 5,721 Net exposure Retail mortgages 150,152 16,761 1,951 652 19,364 1,996 171,512 Retail credit cards 29,886 3,601 226 121 3,948 387 34,221 Retail other 8,410 1,012 108 105 1,225 317 9,952 Corporate loans 112,218 12,561 171 156 12,888 1,956 127,062 Total 300,666 33,935 2,456 1,034 37,425 4,656 342,747 Coverage ratio % % % % % % % Retail mortgages — 0.4 1.0 1.8 0.5 17.7 0.3 Retail credit cards 1.7 25.9 42.3 63.1 29.2 77.5 9.2 Retail other 0.7 7.5 14.3 14.6 8.8 35.7 3.4 Corporate loans 0.3 3.1 4.5 4.3 3.1 23.4 1.0 Total 0.3 5.1 7.9 19.1 5.7 35.3 1.6
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 Rest of the World 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 Rest of the World 3,182 35 1.1 733 73 10.0 176 128 72.7 4,091 236 5.8
Disclosure of 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 Retail mortgages £m £m £m £m £m £m £m £m As at 1 January 2024 150,202 50 19,469 105 2,424 428 172,095 583 Transfers from Stage 1 to Stage 2 (7,828) (4) 7,828 4 — — — — Transfers from Stage 2 to Stage 1 4,688 20 (4,688) (20) — — — — Transfers to Stage 3 (76) (1) (158) (5) 234 6 — — Transfers from Stage 3 30 3 76 1 (106) (4) — — Business activity in the period 9,077 3 224 1 — — 9,301 4 Refinements to models used for calculation — — — — — — — — Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes (3,874) (22) (554) 29 (8) 3 (4,436) 10 Final repayments (6,149) (3) (1,033) (6) (204) (12) (7,386) (21) Disposals 1 (2,477) (5) (316) (29) (129) (32) (2,922) (66) Write-offs — — — — (10) (10) (10) (10) As at 30 June 2024 143,593 41 20,848 80 2,201 379 166,642 500 Retail credit cards As at 1 January 2024 30,409 523 5,578 1,630 1,720 1,333 37,707 3,486 Transfers from Stage 1 to Stage 2 (1,898) (63) 1,898 63 — — — — Transfers from Stage 2 to Stage 1 1,595 389 (1,595) (389) — — — — Transfers to Stage 3 (250) (10) (728) (348) 978 358 — — Transfers from Stage 3 12 6 13 5 (25) (11) — — Business activity in the period 1,547 31 72 23 1 1 1,620 55 Refinements to models used for calculation 2 — 27 — (25) — 11 — 13 Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes (202) (371) 306 654 8 526 112 809 Final repayments (75) (4) (22) (9) (2) (2) (99) (15) Disposals 1 (699) (20) (176) (70) (79) (51) (954) (141) Write-offs — — — — (563) (563) (563) (563) As at 30 June 2024 30,439 508 5,346 1,534 2,038 1,602 37,823 3,644 1 The £2.9bn of gross disposals reported within Retail mortgages relate to sale of the performing Italian mortgage portfolio. The £954m of gross disposals reported within Retail credit cards include £876m sale of the outstanding US Cards receivables to Blackstone and £78m of other debt sales undertaken during the period. 2 Refinements to models used for calculation reported within Retail credit cards include a £43m movement in the US Cards and a £(30)m movement in the UK 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. 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 Retail other £m £m £m £m £m £m £m £m As at 1 January 2024 8,469 59 1,343 118 493 176 10,305 353 Transfers from Stage 1 to Stage 2 (516) (7) 516 7 — — — — Transfers from Stage 2 to Stage 1 371 23 (371) (23) — — — — Transfers to Stage 3 (99) (1) (117) (23) 216 24 — — Transfers from Stage 3 26 1 47 1 (73) (2) — — Business activity in the period 2,092 13 117 9 6 4 2,215 26 Refinements to models used for calculation — — — — — — — — Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes (254) (28) (107) 28 (7) 55 (368) 55 Final repayments (1,698) (7) (116) (4) (160) (18) (1,974) (29) Disposals 1 — — — — (24) (18) (24) (18) Write-offs — — — — (53) (53) (53) (53) As at 30 June 2024 8,391 53 1,312 113 398 168 10,101 334 Corporate loans As at 1 January 2024 112,505 287 13,302 414 2,554 598 128,361 1,299 Transfers from Stage 1 to Stage 2 (2,905) (21) 2,905 21 — — — — Transfers from Stage 2 to Stage 1 2,769 77 (2,769) (77) — — — — Transfers to Stage 3 (244) (2) (586) (28) 830 30 — — Transfers from Stage 3 165 8 136 12 (301) (20) — — Business activity in the period 15,755 27 637 16 136 6 16,528 49 Refinements to models used for calculation 2 — (21) — 9 — — — (12) Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes 3 4,398 (81) (136) 26 (344) 167 3,918 112 Final repayments (18,303) (23) (1,164) (50) (224) (13) (19,691) (86) Disposals 1 (30) (1) (5) (1) — — (35) (2) Write-offs — — — — (134) (134) (134) (134) As at 30 June 2024 114,110 250 12,320 342 2,517 634 128,947 1,226 1 The £24m of gross disposals reported within Retail other relate to debt sales undertaken during the period. The £35m of gross disposals reported within Corporate loans relate to debt sales undertaken during the period. 2 Refinements to models used for calculation reported within Corporate loans include a £(33)m movement in the ESHLA and a £21m movement in 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. 3 'Net drawdowns, repayments, net re-measurement and movements due to exposure and risk parameter changes' reported within Corporate loans includes assets of £0.3bn de-recognised due to payment received on defaulted loans from government guarantees issued under the government’s Bounce Back Loan Scheme. Reconciliation of ECL movement to impairment charge/(release) for the period Stage 1 Stage 2 Stage 3 Total £m £m £m £m Retail mortgages (4) 4 (7) (7) Retail credit cards 5 (26) 883 862 Retail other (6) (5) 63 52 Corporate loans (36) (71) 170 63 ECL movements excluding disposals and write-offs 1 (41) (98) 1,109 970 ECL movement on loan commitments and other financial guarantees 13 (31) (12) (30) ECL movement on other financial assets 2 1 — 3 ECL movement on debt securities at amortised cost (1) (6) — (7) Recoveries and reimbursements 2 (31) 25 (50) (56) ECL charge on assets held for sale 44 Total exchange and other adjustments (27) Total income statement charge for the period 897 1 In H124, gross write-offs amounted to £760m (H123: £583m) and post write-off recoveries amounted to £38m (H123: £21m). Net write-offs represent gross write-offs less post write-off recoveries and amounted to £722m (H123: £562m). 2 Recoveries and reimbursements include £18m (H123 loss: £3m) for reimbursements expected to be received under the arrangement where 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 of £38m (H123: £21m). Loan commitments and financial guarantees Stage 1 Stage 2 Stage 3 Total Gross ECL Gross ECL Gross ECL Gross ECL Retail mortgages £m £m £m £m £m £m £m £m As at 1 January 2024 7,776 — 448 — 4 — 8,228 — Net transfers between stages (25) — 25 — — — — — Business activity in the period 6,279 — — — — — 6,279 — Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes (4,289) — (61) — (1) — (4,351) — Limit management and final repayments (165) — (20) — — — (185) — As at 30 June 2024 9,576 — 392 — 3 — 9,971 — Retail credit cards 1 As at 1 January 2024 144,791 59 2,807 54 142 — 147,740 113 Net transfers between stages (1,060) 27 1,026 (27) 34 — — — Business activity in the period 8,925 13 66 3 1 — 8,992 16 Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes 3,106 (24) (942) 18 (30) — 2,134 (6) Limit management and final repayments (5,851) (6) (252) (12) (8) — (6,111) (18) As at 30 June 2024 149,911 69 2,705 36 139 — 152,755 105 Retail other 1 As at 1 January 2024 8,607 6 535 2 44 — 9,186 8 Net transfers between stages (8) — 1 — 7 — — — Business activity in the period 497 1 84 — — — 581 1 Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes 11 (1) (46) (2) (1) — (36) (3) Limit management and final repayments (638) — (7) — (16) — (661) — As at 30 June 2024 8,469 6 567 — 34 — 9,070 6 Corporate loans As at 1 January 2024 212,889 108 20,418 231 847 44 234,154 383 Net transfers between stages 2,361 36 (2,503) (38) 142 2 — — Business activity in the period 48,341 19 2,365 20 72 — 50,778 39 Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes 4,879 (40) 541 43 (99) (9) 5,321 (6) Limit management and final repayments (46,322) (12) (4,537) (36) (104) (5) (50,963) (53) As at 30 June 2024 222,148 111 16,284 220 858 32 239,290 363 1 Loan commitments reported within Retail credit cards and Retail other also include financial assets classified as held for sale.
Disclosure of management adjustment to models for impairment	Management adjustments to models for impairment allowance presented by product and geography 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 30.06.24 £m £m £m £m £m % Retail mortgages 50 42 128 170 220 77.3 Retail credit cards 643 45 (4) 41 684 6.0 Retail other 231 9 70 79 310 25.5 Corporate loans 683 55 23 78 761 10.2 Total UK 1,607 151 217 368 1,975 18.6 Retail mortgages 282 — (2) (2) 280 (0.7) Retail credit cards 3,065 — — — 3,065 — Retail other 28 — 2 2 30 6.7 Corporate loans 792 — 36 36 828 4.3 Total Rest of the World 4,167 — 36 36 4,203 0.9 Total 5,774 151 253 404 6,178 6.5 Debt securities at amortised cost 29 — (9) (9) 20 (45.0) Total including debt securities at amortised cost 5,803 151 244 395 6,198 6.4 As at 31.12.23 £m £m £m £m £m % Retail mortgages 54 57 121 178 232 76.7 Retail credit cards 700 45 (9) 36 736 4.9 Retail other 251 9 62 71 322 22.0 Corporate loans 761 71 10 81 842 9.6 Total UK 1,766 182 184 366 2,132 17.2 Retail mortgages 354 — (3) (3) 351 (0.9) Retail credit cards 2,855 — 8 8 2,863 0.3 Retail other 45 — (6) (6) 39 (15.4) Corporate loans 828 16 (4) 12 840 1.4 Total Rest of the World 4,082 16 (5) 11 4,093 0.3 Total 5,848 198 179 377 6,225 6.1 Debt securities at amortised cost 27 — — — 27 — Total including debt securities at amortised cost 5,875 198 179 377 6,252 6.0 Economic uncertainty adjustments presented by stage Stage 1 Stage 2 Stage 3 Total As at 30.06.24 £m £m £m £m Retail mortgages 8 25 9 42 Retail credit cards 8 37 — 45 Retail other 3 6 — 9 Corporate loans 35 8 12 55 Total UK 54 76 21 151 Retail mortgages — — — — Retail credit cards — — — — Retail other — — — — Corporate loans — — — — Total Rest of the World — — — — Total 54 76 21 151 As at 31.12.23 £m £m £m £m Retail mortgages 12 32 13 57 Retail credit cards 8 37 — 45 Retail other 3 6 — 9 Corporate loans 48 12 11 71 Total UK 71 87 24 182 Retail mortgages — — — — Retail credit cards — — — — Retail other — — — — Corporate loans 4 12 — 16 Total Rest of the World 4 12 — 16 Total 75 99 24 198 1 Positive values reflect an increase in impairment allowance and negative values reflect a reduction in the impairment allowance. 2 Includes £5.1bn (December 2023: £5.2bn) of modelled ECL, £0.5bn (December 2023: £0.4bn) of individually assessed impairments and £0.2bn (December 2023: £0.3bn) 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.
Disclosure of macroeconomic variables	Macroeconomic variables used in the calculation of ECL As at 30.06.24 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. As at 31.12.23 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 30.06.24 Scenario probability weighting 16.5 26.1 32.6 16.2 8.6 As at 31.12.23 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 30.06.24 % % % % % 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 31.12.23 % % % % % 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 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 30.06.24 % % % % % 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 31.12.23 % % % % % 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 ECL under 100% weighted scenarios for key principal portfolios	The table below shows the modelled ECL assuming each of the five modelled scenarios are 100% weighted with the dispersion of results around the Baseline, highlighting the impact on exposure and ECL across the scenarios. Model exposure uses exposure at default (EAD) values and is not directly comparable to gross exposure used in prior disclosures. Scenarios As at 30.06.24 Weighted 1 Upside 2 Upside 1 Baseline Downside 1 Downside 2 Stage 1 Model Exposure (£m) Retail mortgages 137,577 140,036 139,029 137,590 134,420 132,510 Retail credit cards 2 65,142 65,077 65,108 65,137 65,221 65,228 Retail other 2 8,050 8,183 8,122 8,056 7,918 7,749 Corporate loans 204,588 207,006 205,881 204,883 202,114 197,234 Stage 1 Model ECL (£m) Retail mortgages 3 — 1 2 5 12 Retail credit cards 2 561 534 548 563 584 602 Retail other 2 32 31 32 32 33 31 Corporate loans 278 244 257 272 308 343 Stage 1 Coverage (%) Retail mortgages — — — — — — Retail credit cards 0.9 0.8 0.8 0.9 0.9 0.9 Retail other 0.4 0.4 0.4 0.4 0.4 0.4 Corporate loans 0.1 0.1 0.1 0.1 0.2 0.2 Stage 2 Model Exposure (£m) Retail mortgages 21,804 18,809 19,974 21,598 25,532 28,707 Retail credit cards 2 6,493 6,351 6,420 6,490 6,605 6,799 Retail other 2 1,307 1,174 1,235 1,301 1,439 1,608 Corporate loans 22,261 19,695 20,872 21,984 24,870 29,877 Stage 2 Model ECL (£m) Retail mortgages 8 1 3 5 16 40 Retail credit cards 2 1,544 1,449 1,492 1,537 1,633 1,759 Retail other 2 82 70 75 80 96 107 Corporate loans 537 426 467 513 670 923 Stage 2 Coverage (%) Retail mortgages — — — — 0.1 0.1 Retail credit cards 23.8 22.8 23.2 23.7 24.7 25.9 Retail other 6.3 6.0 6.1 6.1 6.7 6.7 Corporate loans 2.4 2.2 2.2 2.3 2.7 3.1 Stage 3 Model Exposure (£m) 3 Retail mortgages 1,546 1,546 1,546 1,546 1,546 1,546 Retail credit cards 2 2,151 2,151 2,151 2,151 2,151 2,151 Retail other 2 162 162 162 162 162 162 Corporate loans 3,561 3,561 3,561 3,561 3,561 3,561 Stage 3 Model ECL (£m) Retail mortgages 285 268 273 281 304 333 Retail credit cards 2 1,602 1,567 1,585 1,602 1,635 1,663 Retail other 2 94 92 93 94 95 97 Corporate loans 4 67 62 63 66 74 81 Stage 3 Coverage (%) Retail mortgages 18.4 17.3 17.7 18.2 19.7 21.5 Retail credit cards 74.5 72.8 73.7 74.5 76.0 77.3 Retail other 58.0 56.8 57.4 58.0 58.6 59.9 Corporate loans 4 1.9 1.7 1.8 1.9 2.1 2.3 Total Model ECL (£m) Retail mortgages 296 269 277 288 325 385 Retail credit cards 2 3,707 3,550 3,625 3,702 3,852 4,024 Retail other 2 208 193 200 206 224 235 Corporate loans 4 882 732 787 851 1,052 1,347 Total Model ECL 5,093 4,744 4,889 5,047 5,453 5,991 Reconciliation to total ECL £m Total weighted model ECL 5,093 ECL from individually assessed exposures 4 457 ECL from non-modelled exposures and others 224 ECL from debt securities at amortised cost 20 ECL from post model management adjustments 404 Of which: ECL from economic uncertainty adjustments 151 Total ECL 6,198 1 Model exposures are allocated to a stage based on an individual scenario rather than a probability-weighted approach as required for Barclays reported impairment allowances. As a result, it is not possible to back solve the final reported weighted ECL from individual scenarios given balances may be assigned to a different stage dependent on the scenario. 2 Model exposures and ECL reported within Retail credit cards and Retail other exclude the German consumer finance business portfolio classified as assets held for sale. 3 Model exposures allocated to Stage 3 does not change in any of the scenarios as the transition criteria relies only on an observable evidence of default as at 30 June 2024 and not on macroeconomic scenario. 4 Material corporate loan defaults are individually assessed across different recovery strategies. As a result, ECL of £457m is reported as an individually assessed impairment in the reconciliation table. Scenarios As at 31.12.23 Weighted 1 Upside 2 Upside 1 Baseline Downside 1 Downside 2 Stage 1 Model Exposure (£m) Retail mortgages 145,226 147,415 146,653 145,405 142,543 138,925 Retail credit cards 2 66,512 66,459 66,482 66,497 66,580 66,580 Retail other 2 8,749 8,915 8,841 8,758 8,631 8,479 Corporate loans 175,282 179,567 177,923 175,903 172,328 167,541 Stage 1 Model ECL (£m) Retail mortgages 9 4 5 7 11 22 Retail credit cards 2 562 529 545 561 584 605 Retail other 2 32 31 32 32 32 31 Corporate loans 275 243 257 270 298 318 Stage 1 Coverage (%) Retail mortgages — — — — — — Retail credit cards 0.8 0.8 0.8 0.8 0.9 0.9 Retail other 0.4 0.3 0.4 0.4 0.4 0.4 Corporate loans 0.2 0.1 0.1 0.2 0.2 0.2 Stage 2 Model Exposure (£m) Retail mortgages 20,615 17,769 18,702 20,149 23,836 28,822 Retail credit cards 2 7,076 6,897 6,976 7,064 7,183 7,387 Retail other 2 1,382 1,216 1,290 1,373 1,500 1,653 Corporate loans 24,374 19,919 21,621 23,763 27,445 32,375 Stage 2 Model ECL (£m) Retail mortgages 41 23 27 34 59 123 Retail credit cards 2 1,684 1,554 1,609 1,668 1,775 1,922 Retail other 2 85 72 78 84 95 105 Corporate loans 663 509 565 633 782 1,031 Stage 2 Coverage (%) Retail mortgages 0.2 0.1 0.1 0.2 0.2 0.4 Retail credit cards 23.8 22.5 23.1 23.6 24.7 26.0 Retail other 6.2 5.9 6.0 6.1 6.3 6.4 Corporate loans 2.7 2.6 2.6 2.7 2.8 3.2 Stage 3 Model Exposure (£m) 3 Retail mortgages 1,672 1,672 1,672 1,672 1,672 1,672 Retail credit cards 2 1,827 1,827 1,827 1,827 1,827 1,827 Retail other 2 164 164 164 164 164 164 Corporate loans 3,436 3,436 3,436 3,436 3,436 3,436 Stage 3 Model ECL (£m) Retail mortgages 333 308 316 325 351 393 Retail credit cards 2 1,315 1,279 1,296 1,313 1,341 1,366 Retail other 2 95 94 94 95 96 97 Corporate loans 4 77 71 73 75 82 89 Stage 3 Coverage (%) Retail mortgages 19.9 18.4 18.9 19.4 21.0 23.5 Retail credit cards 72.0 70.0 70.9 71.9 73.4 74.8 Retail other 57.9 57.3 57.3 57.9 58.5 59.1 Corporate loans 4 2.2 2.1 2.1 2.2 2.4 2.6 Total Model ECL (£m) Retail mortgages 383 335 348 366 421 538 Retail credit cards 2 3,561 3,362 3,450 3,542 3,700 3,893 Retail other 2 212 197 204 211 223 233 Corporate loans 4 1,015 823 895 978 1,162 1,438 Total Model ECL 5,171 4,717 4,897 5,097 5,506 6,102 Reconciliation to total ECL £m Total weighted model ECL 5,171 ECL from individually assessed exposures 4 401 ECL from non-modelled exposures and others 276 ECL from debt securities at amortised cost 27 ECL from post model management adjustments 377 Of which: ECL from economic uncertainty adjustments 198 Total ECL 6,252 1 Model exposures are allocated to a stage based on an individual scenario rather than a probability-weighted approach, as required for Barclays reported impairment allowances. As a result, it is not possible to back solve the final reported weighted ECL from individual scenarios given balances may be assigned to a different stage dependent on the scenario. 2 Model exposures and ECL reported within Retail credit cards and Retail other exclude the German consumer finance business portfolio classified as assets held for sale. 3 Model exposures allocated to Stage 3 does not change in any of the scenarios as the transition criteria relies only on an observable evidence of default as at 31 December 2023 and not on macroeconomic scenario. 4 Material corporate loan defaults are individually assessed across different recovery strategies. As a result, ECL of £401m is reported as an individually assessed impairment in the reconciliation table.
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 16 25 11 Spread risk 5 7 4 7 10 5 10 14 7 Foreign exchange risk 4 9 2 4 9 2 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 (63) n/a n/a Total management VaR 29 36 20 39 55 24 45 60 34 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.
Disclosure of own funds and eligible liabilities	Capital ratios 1,2 As at 30.06.24 As at 31.03.24 As at 31.12.23 CET1 13.6 % 13.5% 13.8% T1 17.3 % 17.3% 17.7% Total regulatory capital 19.9 % 19.6% 20.1% MREL ratio as a percentage of total RWAs 33.5 % 33.4% 33.6% Own funds and eligible liabilities £m £m £m Total equity excluding non-controlling interests per the balance sheet 71,173 71,680 71,204 Less: other equity instruments (recognised as AT1 capital) (12,959) (13,241) (13,259) Adjustment to retained earnings for foreseeable ordinary share dividends (645) (1,123) (795) Adjustment to retained earnings for foreseeable repurchase of shares (222) (796) — Adjustment to retained earnings for foreseeable other equity coupons (41) (46) (43) Other regulatory adjustments and deductions Additional value adjustments (PVA) (1,887) (1,834) (1,901) Goodwill and intangible assets (7,835) (7,807) (7,790) Deferred tax assets that rely on future profitability excluding temporary differences (1,630) (1,558) (1,630) Fair value reserves related to gains or losses on cash flow hedges 3,799 4,049 3,707 Excess of expected losses over impairment (324) (299) (296) Gains or losses on liabilities at fair value resulting from own credit 622 378 136 Defined benefit pension fund assets (2,564) (2,509) (2,654) Direct and indirect holdings by an institution of own CET1 instruments (5) (3) (20) Adjustment under IFRS 9 transitional arrangements 123 137 288 Other regulatory adjustments 90 116 357 CET1 capital 47,695 47,144 47,304 AT1 capital Capital instruments and related share premium accounts 13,000 13,263 13,263 Other regulatory adjustments and deductions (41) (22) (60) AT1 capital 12,959 13,241 13,203 T1 capital 60,654 60,385 60,507 T2 capital Capital instruments and related share premium accounts 8,836 7,704 7,966 Qualifying T2 capital (including minority interests) issued by subsidiaries 385 401 569 Credit risk adjustments (excess of impairment over expected losses) 39 — — Other regulatory adjustments and deductions (43) (35) (160) Total regulatory capital 69,871 68,455 68,882 Less : Ineligible T2 capital (including minority interests) issued by subsidiaries (385) (401) (569) Eligible liabilities 48,299 48,770 46,995 Total own funds and eligible liabilities 3 117,785 116,824 115,308 Total RWAs 351,433 349,635 342,717

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 Barclays UK Corporate Bank Barclays Private Bank and Wealth Management Barclays Investment Bank Barclays US Consumer Bank Head Office Barclays Group Half year ended 30.06.24 £m £m £m £m £m £m £m Net interest income 3,146 573 362 465 1,334 248 6,128 Non-interest income/(expense) 567 304 270 5,882 344 (218) 7,149 Total income 3,713 877 632 6,347 1,678 30 13,277 Operating costs (2,048) (456) (434) (3,858) (796) (406) (7,997) UK regulatory levies 1 (54) (30) (3) (33) — — (120) Litigation and conduct (6) — 1 (11) (4) (43) (64) Total operating expenses (2,108) (486) (436) (3,902) (800) (449) (8,181) Other net income 2 — — — — — 16 16 Profit/(loss) before impairment 1,605 391 196 2,445 878 (403) 5,112 Credit impairment (charges)/ releases (66) (23) 3 (34) (719) (58) (897) Profit/(loss) before tax 1,539 368 199 2,411 159 (461) 4,215 As at 30.06.24 £bn £bn £bn £bn £bn £bn £bn Total assets 293.0 64.0 35.8 1,113.8 32.1 37.9 1,576.6 Total liabilities 262.5 86.4 65.2 997.1 21.5 72.1 1,504.8 Barclays UK Barclays UK Corporate Bank Barclays Private Bank and Wealth Management Barclays Investment Bank Barclays US Consumer Bank Head Office Barclays Group Half year ended 30.06.23 £m £m £m £m £m £m £m Net interest income 3,278 609 367 714 1,256 99 6,323 Non-interest income 644 326 191 5,598 337 103 7,199 Total income 3,922 935 558 6,312 1,593 202 13,522 Operating costs (2,182) (423) (326) (3,845) (828) (425) (8,030) UK regulatory levies 1 — — — — — — — Litigation and conduct 3 — — 1 (4) (33) (32) Total operating expenses (2,179) (423) (326) (3,844) (832) (458) (8,062) Other net income/(expenses) 2 — 2 — (1) — (3) (2) Profit/(loss) before impairment 1,743 514 232 2,467 761 (259) 5,458 Credit impairment (charges)/releases (208) 60 (10) (102) (585) (51) (896) Profit/(loss) before tax 1,535 574 222 2,365 176 (310) 4,562 As at 31.12.23 £bn £bn £bn £bn £bn £bn £bn Total assets 293.1 61.5 32.0 1,019.1 33.6 38.2 1,477.5 Total liabilities 264.2 85.9 60.9 904.5 21.1 69.0 1,405.6 Prior period segmental comparators shown in this document were re-presented in the 2023 Results Resegmentation Document, which may be accessed via the Barclays website at: home.barclays/investor-relations 1 Comprises the impact of the BoE levy scheme and the UK bank levy. 2 Other net income/(expenses) represents the share of post-tax results of associates and joint ventures, profit (or loss) on disposal of subsidiaries, associates and joint ventures and gains on acquisitions.
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 6,829 7,312 Europe 1,180 1,265 Americas 4,574 4,187 Africa and Middle East 39 42 Asia 655 716 Total 13,277 13,522 1 The geographical analysis is based on the location of the office where the transactions are recorded.

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 Barclays UK Corporate Bank Barclays Private Bank and Wealth Management Barclays Investment Bank Barclays US consumer Bank Head Office Barclays Group Half year ended 30.06.24 £m £m £m £m £m £m £m Fee type Transactional 551 232 16 171 1,320 171 2,461 Advisory — — 156 325 — — 481 Brokerage and execution 107 — 62 776 — — 945 Underwriting and syndication 17 46 — 1,391 — — 1,454 Other 13 — — — — 6 19 Total revenue from contracts with customers 688 278 234 2,663 1,320 177 5,360 Other non-contract fee income — 11 — 58 — — 69 Fee and commission income 688 289 234 2,721 1,320 177 5,429 Fee and commission expense (177) (43) (19) (516) (893) (43) (1,691) Net fee and commission income 511 246 215 2,205 427 134 3,738 Barclays UK Barclays UK Corporate Bank Barclays Private Bank and Wealth Management Barclays Investment Bank Barclays US consumer Bank Head Office Barclays Group Half year ended 30.06.23 £m £m £m £m £m £m £m Fee type Transactional 560 212 13 160 1,290 152 2,387 Advisory 57 — 94 363 — — 514 Brokerage and execution 122 — 44 998 — — 1,164 Underwriting and syndication — 39 — 997 — — 1,036 Other 27 1 1 11 5 37 82 Total revenue from contracts with customers 766 252 152 2,529 1,295 189 5,183 Other non-contract fee income — 15 3 56 — — 74 Fee and commission income 766 267 155 2,585 1,295 189 5,257 Fee and commission expense (188) (47) (14) (740) (870) (39) (1,898) Net fee and commission income 578 220 141 1,845 425 150 3,359

Staff costs (Tables)

Staff costs (Tables)	6 Months Ended
	Jun. 30, 2024
Classes of employee benefits expense [abstract]
Staff costs	Half year ended 30.06.24 Half year ended 30.06.23 Compensation costs £m £m Upfront bonus charge 675 665 Deferred bonus charge 269 263 Other incentives 35 42 Performance costs 979 970 Salaries 2,491 2,540 Social security costs 395 399 Post-retirement benefits 296 268 Other compensation costs 282 281 Total compensation costs 4,443 4,458 Other resourcing costs Outsourcing 299 340 Redundancy and restructuring 138 63 Temporary staff costs 31 53 Other 53 71 Total other resourcing costs 521 527 Total staff costs 4,964 4,985 Barclays Group compensation costs as a % of total income 33.5% 33.0%

Infrastructure, administratio_2

Infrastructure, administration and general expenses (Tables)	6 Months Ended
	Jun. 30, 2024
Expenses by nature [abstract]
Infrastructure, administration and general expenses	Half year ended 30.06.24 Half year ended 30.06.23 Infrastructure costs £m £m Property and equipment 857 857 Depreciation and amortisation 843 902 Impairment of property, equipment and intangible assets 4 18 Total infrastructure costs 1,704 1,777 Administration and general expenses Consultancy, legal and professional fees 388 336 Marketing and advertising 308 288 Other administration and general expenses 633 644 Total administration and general expenses 1,329 1,268 Total infrastructure, administration and general expenses 3,033 3,045

Earnings per share (Tables)

Earnings per share (Tables)	6 Months Ended
	Jun. 30, 2024
Earnings per share [abstract]
Earnings per share	Half year ended 30.06.24 Half year ended 30.06.23 £m £m Profit attributable to ordinary equity holders of the parent 2,787 3,111 m m Basic weighted average number of shares in issue 14,972 15,645 Number of potential ordinary shares 445 470 Diluted weighted average number of shares 15,417 16,115 p p Basic earnings per ordinary share 18.6 19.9 Diluted earnings per ordinary share 18.1 19.3

Dividends on ordinary shares (T

Dividends on ordinary shares (Tables)	6 Months Ended
	Jun. 30, 2024
Dividends [Abstract]
Dividends on ordinary shares	Half year ended 30.06.24 Half year ended 30.06.23 Per share Total Per share Total Dividends paid during the period p £m p £m Full year dividend paid during period 5.30 796 5.00 793

Derivative financial instrume_2

Derivative financial instruments (Tables)	6 Months Ended
	Jun. 30, 2024
Disclosure of nature and extent of risks arising from financial instruments [abstract]
Total recognised derivative assets/(liabilities)	Contract notional amount Fair value Assets Liabilities As at 30.06.24 £m £m £m Foreign exchange derivatives 7,727,915 78,912 (72,582) Interest rate derivatives 73,107,979 102,047 (89,954) Credit derivatives 1,533,970 6,449 (7,169) Equity and stock index and commodity derivatives 3,091,961 63,339 (71,790) Derivative assets/(liabilities) held for trading 85,461,825 250,747 (241,495) Derivatives in hedge accounting relationships Derivatives designated as cash flow hedges 145,884 2,738 (75) Derivatives designated as fair value hedges 156,031 122 (549) Derivatives designated as hedges of net investments 4,152 7 (17) Derivative assets/(liabilities) designated in hedge accounting relationships 306,067 2,867 (641) Total recognised derivative assets/(liabilities) 85,767,892 253,614 (242,136) As at 31.12.23 Foreign exchange derivatives 6,740,828 87,518 (83,225) Interest rate derivatives 54,134,591 109,431 (97,427) Credit derivatives 1,448,350 7,662 (8,630) Equity and stock index and commodity derivatives 2,669,722 50,032 (60,176) Derivative assets/(liabilities) held for trading 64,993,491 254,643 (249,458) Derivatives in hedge accounting relationships Derivatives designated as cash flow hedges 157,817 1,904 (8) Derivatives designated as fair value hedges 138,015 178 (533) Derivatives designated as hedges of net investments 3,744 111 (45) Derivative assets/(liabilities) designated in hedge accounting relationships 299,576 2,193 (586) Total recognised derivative assets/(liabilities) 65,293,067 256,836 (250,044)

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 Level 3 assets and liabilities held at fair value disaggregated by product type	The following table shows the 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 98,992 89,588 8,726 197,306 Financial assets at fair value through the income statement 7,502 198,187 9,517 215,206 Derivative financial instruments 86 250,695 2,833 253,614 Financial assets at fair value through other comprehensive income 32,151 48,142 2,454 82,747 Investment property — — 1 1 Total assets 138,731 586,612 23,531 748,874 Trading portfolio liabilities (33,309) (25,621) (385) (59,315) Financial liabilities designated at fair value (182) (318,283) (2,492) (320,957) Derivative financial instruments (66) (237,735) (4,335) (242,136) Total liabilities (33,557) (581,639) (7,212) (622,408) As at 31.12.23 Trading portfolio assets 94,658 73,438 6,509 174,605 Financial assets at fair value through the income statement 5,831 192,571 8,249 206,651 Derivative financial instruments 107 253,189 3,540 256,836 Financial assets at fair value through other comprehensive income 30,247 40,511 1,078 71,836 Investment property — — 2 2 Total assets 130,843 559,709 19,378 709,930 Trading portfolio liabilities (29,274) (29,027) (368) (58,669) Financial liabilities designated at fair value (117) (296,200) (1,222) (297,539) Derivative financial instruments (81) (245,310) (4,653) (250,044) Total liabilities (29,472) (570,537) (6,243) (606,252) The following table shows the 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 1,623 (1,538) 2,211 (1,701) Foreign exchange derivatives 175 (118) 111 (91) Credit derivatives 216 (798) 241 (820) Equity derivatives 819 (1,881) 977 (2,041) Issued debt — (1,539) — (637) Corporate debt 2,261 (353) 1,867 (352) Reverse repurchase and repurchase agreements 620 (934) 209 (517) Loans 12,932 — 10,614 — Asset backed securities 2,145 (2) 603 — Private equity investments 1,128 (18) 1,375 (10) Other 1 1,612 (31) 1,170 (74) Total 23,531 (7,212) 19,378 (6,243) 1 Other includes funds and fund-linked products, Government and Government sponsored debt, equity 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 Total gains and (losses) in the period recognised in the income statement Total gains or (losses) recognised in OCI Transfers As at 01.01.24 Purchases Sales Issues Settle-ments Trading income Other income In Out As at 30.06.24 £m £m £m £m £m £m £m £m £m £m £m Corporate debt 681 831 (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 1,041 765 (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 888 — (2) — — 13 7 — — — 906 Loans 5,612 1,760 (999) — (344) (36) 18 — 139 (70) 6,080 Private equity investments 1,371 112 (482) — (17) 3 140 — — (3) 1,124 Reverse repurchase and repurchase agreements 209 297 — — — — — — 141 (27) 620 Asset backed securities 85 590 (1) — (12) 1 — — 9 (14) 658 Other 84 45 — — (7) — 9 — 2 (4) 129 Financial assets at fair value through the income statement 8,249 2,804 (1,484) — (380) (19) 174 — 291 (118) 9,517 Corporate debt 298 — — — — — — — — (248) 50 Loans 533 1,097 — — — 1 11 — — — 1,642 Private equity investments 4 — — — — — — — — — 4 Asset backed securities 200 757 — — — — — — — (200) 757 Other 43 — (42) — — — — — — — 1 Assets at fair value through other comprehensive income 1,078 1,854 (42) — — 1 11 — — (448) 2,454 Investment property 2 — (1) — — — — — — — 1 Trading portfolio liabilities (368) (24) 17 — — 18 — — (34) 6 (385) Financial liabilities designated at fair value (1,222) (6) 28 (627) 16 (27) (21) — (881) 248 (2,492) Interest rate derivatives 510 10 — — (135) (158) — — 31 (173) 85 Foreign exchange derivatives 20 (1) (1) — 19 6 — — 21 (7) 57 Credit derivatives (579) 5 33 — — (22) — — (22) 3 (582) Equity derivatives (1,064) (196) — (19) (53) (7) — — (9) 286 (1,062) Net derivative financial instruments 1 (1,113) (182) 32 (19) (169) (181) — — 21 109 (1,502) Total 13,135 7,559 (2,457) (646) (1,247) (215) 164 — 443 (417) 16,319 1 Derivative financial instruments are presented on a net basis. On a gross basis, derivative financial assets were £2,833m and derivative financial liabilities were £(4,335)m. Level 3 movement analysis As at 01.01.23 Purchases Sales Issues Settle- 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 Trading income Other income In Out £m £m £m £m £m £m £m £m £m £m £m Corporate debt 597 336 (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 871 706 (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 6,396 1,837 (823) — (771) (57) (42) — 50 (114) 6,476 Private equity investments 1,284 50 (22) — (3) (50) 14 — 2 — 1,275 Reverse repurchase and repurchase agreements 38 — — — — (11) — — 46 (29) 44 Asset backed securities 192 10 (4) — — (13) — — 21 (16) 190 Other 136 — (8) — (21) (2) (9) — 1 — 97 Financial assets at fair value through the income statement 9,125 1,897 (977) — (795) (153) (40) — 120 (159) 9,018 Corporate debt — 13 — — — — — — 46 — 59 Loans — 47 — — — — — — — — 47 Private equity investments 7 — — — — — — (2) — — 5 Asset backed securities 3 — — — (1) — — — — — 2 Other 1 — — — — — — — — — 1 Assets at fair value through other comprehensive income 11 60 — — (1) — — (2) 46 — 114 Investment property 5 — — — — — (3) — — — 2 Trading portfolio liabilities (56) (16) 4 — — 15 — — (8) 9 (52) Financial liabilities designated at fair value (1,050) — — (226) — 4 (1) — (290) 463 (1,100) Interest rate derivatives (496) 2 — — 19 (35) — — 544 446 480 Foreign exchange derivatives 39 — — — — (31) — — 12 (15) 5 Credit derivatives (313) (191) 5 — 66 13 — — 52 16 (352) Equity derivatives (419) (90) — — (132) (135) — — (104) 12 (868) Net derivative financial instruments 1 (1,189) (279) 5 — (47) (188) — — 504 459 (735) Total 13,326 3,947 (2,844) (226) (1,245) (356) (44) (2) 1,394 96 14,046 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	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 1 47 — 48 (144) (40) — (184) Financial assets at fair value through other comprehensive income 1 11 — 12 — — (2) (2) Investment properties — — — — — (3) — (3) Trading portfolio liabilities 17 — — 17 15 — — 15 Financial liabilities designated at fair value (29) (10) — (39) 2 (1) — 1 Net derivative financial instruments (180) — — (180) (186) — — (186) Total (192) 48 — (144) (348) (44) (2) (394)
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 687 32 (851) (32) 612 2 (801) (2) Private equity investments 215 — (215) — 263 1 (263) (1) Asset Backed Securities 39 4 (29) (4) 36 1 (27) (1) Other 1 95 — (108) — 90 — (91) — Total 1,409 36 (1,718) (36) 1,286 4 (1,629) (4) 1 Other includes, Equity Cash Products, Fund and Fund Linked, Government and Government Sponsored Debt, Issued debt.
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 (510) (569) 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 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 61,700 60,738 56,749 55,437 Loans and advances at amortised cost 337,809 333,405 342,747 334,706 Reverse repurchase agreements and other similar secured lending 4,724 4,724 2,594 2,594 Financial liabilities Deposits at amortised cost (557,452) (557,528) (538,789) (538,502) Repurchase agreements and other similar secured borrowing (52,352) (52,352) (41,601) (41,601) Debt securities in issue (96,772) (98,656) (96,825) (98,123) Subordinated liabilities (11,795) (12,242) (10,494) (10,803)

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 10,494 11,423 Issuances 1,355 1,523 Redemptions — (2,239) Other (54) (213) Closing balance 11,795 10,494

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 204 295 Legal, competition and regulatory matters 95 99 Redundancy and restructuring 241 397 Undrawn contractually committed facilities and guarantees 474 504 Sundry provisions 278 289 Total 1,292 1,584

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 3,587 3,671 Fair value through other comprehensive income reserve (1,635) (1,366) Cash flow hedging reserve (3,797) (3,707) Own credit reserve (702) (240) Other reserves and treasury shares 1,665 1,565 Total (882) (77)

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 17,052 17,353 Performance guarantees, acceptances and endorsements 8,434 7,987 Total 25,486 25,340 Commitments Documentary credits and other short-term trade related transactions 2,489 2,352 Standby facilities, credit lines and other commitments 402,361 388,085 Total 404,850 390,437

Credit Risk - Disclosure of loa

Credit Risk - Disclosure of loans and advances at amortised cost by geography (Details) £ in Millions	6 Months Ended		12 Months Ended
	Jun. 30, 2024 GBP (£)	Jun. 30, 2023 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]
Loan loss rate	0.0045		0.0046
Total income statement charge for the period	£ 897	£ 896	£ 1,881
Impairment allowance
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	(6,198)		(6,252)
Financial assets at fair value through profit or loss, designated upon initial recognition or subsequently | Gross exposure
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	19,300		16,500
Total of loans and advances at amortised cost including off balance sheet loan commitments and financial guarantee contracts
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 810,121		£ 798,300
Coverage ratio	0.008		0.008
Total of loans and advances at amortised cost including off balance sheet loan commitments and financial guarantee contracts | Gross exposure
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 816,319		£ 804,552
Total of loans and advances at amortised cost including off balance sheet loan commitments and financial guarantee contracts | Impairment allowance
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	6,198		6,252
Total of loans and advances at amortised cost including off balance sheet loan commitments and financial guarantee contracts | 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	£ 743,677		£ 727,414
Coverage ratio	0.001		0.002
Total of loans and advances at amortised cost including off balance sheet loan commitments and financial guarantee contracts | Stage 1 | Gross exposure
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 744,725		£ 728,517
Total of loans and advances at amortised cost including off balance sheet loan commitments and financial guarantee contracts | Stage 1 | Impairment allowance
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	1,048		1,103
Total of loans and advances at amortised cost including off balance sheet loan commitments and financial guarantee contracts | 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	£ 61,071		£ 65,237
Coverage ratio	0.037		0.038
Total of loans and advances at amortised cost including off balance sheet loan commitments and financial guarantee contracts | Lifetime expected credit losses | Stage 2 | Gross exposure
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 63,406		£ 67,807
Total of loans and advances at amortised cost including off balance sheet loan commitments and financial guarantee contracts | Lifetime expected credit losses | Stage 2 | Impairment allowance
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	2,335		2,570
Total of loans and advances at amortised cost including off balance sheet loan commitments and financial guarantee contracts | 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	£ 5,373		£ 5,649
Coverage ratio	0.344		0.313
Total of loans and advances at amortised cost including off balance sheet loan commitments and financial guarantee contracts | Lifetime expected credit losses | Stage 3 | Gross exposure
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 8,188		£ 8,228
Total of loans and advances at amortised cost including off balance sheet loan commitments and financial guarantee contracts | Lifetime expected credit losses | Stage 3 | Impairment allowance
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	2,815		2,579
Loans and advances at amortised cost including debt securities
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 399,509		£ 399,496
Coverage ratio	0.014		0.014
Loans and advances at amortised cost including debt securities | Gross exposure
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 405,233		£ 405,244
Loans and advances at amortised cost including debt securities | Impairment allowance
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	5,724		5,748
Loans and advances at amortised cost including debt securities | 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	£ 353,759		£ 353,524
Coverage ratio	0.002		0.003
Loans and advances at amortised cost including debt securities | Stage 1 | Gross exposure
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 354,621		£ 354,454
Loans and advances at amortised cost including debt securities | Stage 1 | Impairment allowance
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	862		930
Loans and advances at amortised cost including debt securities | 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	£ 41,379		£ 41,316
Coverage ratio	0.048		0.052
Loans and advances at amortised cost including debt securities | Lifetime expected credit losses | Stage 2 | Gross exposure
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 43,458		£ 43,599
Loans and advances at amortised cost including debt securities | Lifetime expected credit losses | Stage 2 | Impairment allowance
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	2,079		2,283
Loans and advances at amortised cost including debt securities | 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	£ 4,371		£ 4,656
Coverage ratio	0.389		0.353
Loans and advances at amortised cost including debt securities | Lifetime expected credit losses | Stage 3 | Gross exposure
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 7,154		£ 7,191
Loans and advances at amortised cost including debt securities | Lifetime expected credit losses | Stage 3 | Impairment allowance
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	2,783		2,535
Loans and advances | 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	£ 337,809		£ 342,747
Coverage ratio	0.017		0.016
Loans and advances | Financial assets at amortised cost | UK
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 242,449		£ 248,316
Coverage ratio	0.008		0.008
Loans and advances | Financial assets at amortised cost | Rest of the world
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 95,360		£ 94,431
Coverage ratio	0.039		0.038
Loans and advances | Financial assets at amortised cost | Gross exposure
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 343,513		£ 348,468
Loans and advances | Financial assets at amortised cost | Gross exposure | UK
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	244,307		250,326
Loans and advances | Financial assets at amortised cost | Gross exposure | Rest of the world
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	99,206		98,142
Loans and advances | Financial assets at amortised cost | Impairment allowance
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	5,704		5,721
Loans and advances | Financial assets at amortised cost | Impairment allowance | UK
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	1,858		2,010
Loans and advances | Financial assets at amortised cost | Impairment allowance | Rest of the world
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	3,846		3,711
Loans and advances | Stage 1 | 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	£ 295,681		£ 300,666
Coverage ratio	0.003		0.003
Loans and advances | Stage 1 | Financial assets at amortised cost | UK
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 208,024		£ 214,783
Coverage ratio	0.002		0.002
Loans and advances | Stage 1 | Financial assets at amortised cost | Rest of the world
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 87,657		£ 85,883
Coverage ratio	0.006		0.006
Loans and advances | Stage 1 | Financial assets at amortised cost | Gross exposure
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 296,533		£ 301,585
Loans and advances | Stage 1 | Financial assets at amortised cost | Gross exposure | UK
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	208,382		215,184
Loans and advances | Stage 1 | Financial assets at amortised cost | Gross exposure | Rest of the world
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	88,151		86,401
Loans and advances | Stage 1 | Financial assets at amortised cost | Impairment allowance
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	852		919
Loans and advances | Stage 1 | Financial assets at amortised cost | Impairment allowance | UK
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	358		401
Loans and advances | Stage 1 | Financial assets at amortised cost | Impairment allowance | Rest of the world
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	494		518
Loans and advances | Lifetime expected credit losses | Stage 2 | 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	£ 37,757		£ 37,425
Coverage ratio	0.052		0.057
Loans and advances | Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | UK
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 31,444		£ 30,276
Coverage ratio	0.026		0.029
Loans and advances | Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Rest of the world
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 6,313		£ 7,149
Coverage ratio	0.164		0.161
Loans and advances | Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 39,826		£ 39,692
Loans and advances | Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure | UK
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	32,279		31,176
Loans and advances | Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure | Rest of the world
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	7,547		8,516
Loans and advances | Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	2,069		2,267
Loans and advances | Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance | UK
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	835		900
Loans and advances | Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance | Rest of the world
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	1,234		1,367
Loans and advances | Lifetime expected credit losses | Stage 3 | 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	£ 4,371		£ 4,656
Coverage ratio	0.389		0.353
Loans and advances | Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | UK
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		£ 3,257
Coverage ratio	0.182		0.179
Loans and advances | Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Rest of the world
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 1,390		£ 1,399
Coverage ratio	0.604		0.566
Loans and advances | Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Gross exposure
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 7,154		£ 7,191
Loans and advances | Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Gross exposure | UK
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	3,646		3,966
Loans and advances | Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Gross exposure | Rest of the world
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	3,508		3,225
Loans and advances | Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Impairment allowance
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	2,783		2,535
Loans and advances | Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Impairment allowance | UK
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	665		709
Loans and advances | Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Impairment allowance | Rest of the world
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	2,118		1,826
Retail mortgages | Gross exposure
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	9,971		8,228
Retail mortgages | Impairment allowance
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	0		0
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	£ 166,142		£ 171,512
Coverage ratio	0.003		0.003
Retail mortgages | Financial assets at amortised cost | UK
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 164,305		£ 166,704
Coverage ratio	0.001		0.001
Retail mortgages | Financial assets at amortised cost | Rest of the world
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 1,837		£ 4,808
Coverage ratio	0.132		0.068
Retail mortgages | Financial assets at amortised cost | Gross exposure
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 166,642		£ 172,095
Retail mortgages | Financial assets at amortised cost | Gross exposure | UK
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	164,525		166,936
Retail mortgages | Financial assets at amortised cost | Gross exposure | Rest of the world
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	2,117		5,159
Retail mortgages | Financial assets at amortised cost | Impairment allowance
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	500		583
Retail mortgages | Financial assets at amortised cost | Impairment allowance | UK
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	220		232
Retail mortgages | Financial assets at amortised cost | Impairment allowance | Rest of the world
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	280		351
Retail mortgages | Stage 1 | Gross exposure
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	9,576		7,776
Retail mortgages | Stage 1 | Impairment allowance
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	0		0
Retail mortgages | Stage 1 | 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	£ 143,552		£ 150,152
Coverage ratio	0		0
Retail mortgages | Stage 1 | Financial assets at amortised cost | UK
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 141,984		£ 145,958
Coverage ratio	0		0
Retail mortgages | Stage 1 | Financial assets at amortised cost | Rest of the world
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 1,568		£ 4,194
Coverage ratio	0.001		0.002
Retail mortgages | Stage 1 | Financial assets at amortised cost | Gross exposure
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 143,593		£ 150,202
Retail mortgages | Stage 1 | Financial assets at amortised cost | Gross exposure | UK
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	142,023		146,001
Retail mortgages | Stage 1 | Financial assets at amortised cost | Gross exposure | Rest of the world
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	1,570		4,201
Retail mortgages | Stage 1 | Financial assets at amortised cost | Impairment allowance
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	41		50
Retail mortgages | Stage 1 | Financial assets at amortised cost | Impairment allowance | UK
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	39		43
Retail mortgages | Stage 1 | Financial assets at amortised cost | Impairment allowance | Rest of the world
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	2		7
Retail mortgages | Lifetime expected credit losses | Stage 2 | Gross exposure
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	392		448
Retail mortgages | Lifetime expected credit losses | Stage 2 | Impairment allowance
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	0		0
Retail mortgages | Lifetime expected credit losses | Stage 2 | 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	£ 20,768		£ 19,364
Coverage ratio	0.004		0.005
Retail mortgages | Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | UK
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 20,731		£ 19,046
Coverage ratio	0.004		0.004
Retail mortgages | Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Rest of the world
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 37		£ 318
Coverage ratio	0		0.081
Retail mortgages | Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 20,848		£ 19,469
Retail mortgages | Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure | UK
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	20,811		19,123
Retail mortgages | Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure | Rest of the world
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	37		346
Retail mortgages | Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	80		105
Retail mortgages | Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance | UK
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	80		77
Retail mortgages | Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance | Rest of the world
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
Retail mortgages | Lifetime expected credit losses | Stage 3 | Gross exposure
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	3		4
Retail mortgages | Lifetime expected credit losses | Stage 3 | Impairment allowance
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	0		0
Retail mortgages | Lifetime expected credit losses | Stage 3 | 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	£ 1,822		£ 1,996
Coverage ratio	0.172		0.177
Retail mortgages | Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | UK
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 1,590		£ 1,700
Coverage ratio	0.060		0.062
Retail mortgages | Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Rest of the world
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 232		£ 296
Coverage ratio	0.545		0.516
Retail mortgages | Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Gross exposure
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 2,201		£ 2,424
Retail mortgages | Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Gross exposure | UK
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	1,691		1,812
Retail mortgages | Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Gross exposure | Rest of the world
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	510		612
Retail mortgages | Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Impairment allowance
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	379		428
Retail mortgages | Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Impairment allowance | UK
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	101		112
Retail mortgages | Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Impairment allowance | Rest of the world
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	278		316
Retail credit cards | Gross exposure
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	152,755		147,740
Retail credit cards | Impairment allowance
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	105		113
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	£ 34,179		£ 34,221
Coverage ratio	0.096		0.092
Retail credit cards | Financial assets at amortised cost | UK
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 10,225		£ 9,710
Coverage ratio	0.061		0.068
Retail credit cards | Financial assets at amortised cost | Rest of the world
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 | Gross exposure
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 37,823		£ 37,707
Retail credit cards | Financial assets at amortised cost | Gross exposure | UK
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	10,888		10,420
Retail credit cards | Financial assets at amortised cost | Gross exposure | Rest of the world
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
Retail credit cards | Financial assets at amortised cost | Impairment allowance
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	3,644		3,486
Retail credit cards | Financial assets at amortised cost | Impairment allowance | UK
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	663		710
Retail credit cards | Financial assets at amortised cost | Impairment allowance | Rest of the world
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
Retail credit cards | Stage 1 | Gross exposure
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	149,911		144,791
Retail credit cards | Stage 1 | Impairment allowance
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	69		59
Retail credit cards | Stage 1 | 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	£ 29,931		£ 29,886
Coverage ratio	0.017		0.017
Retail credit cards | Stage 1 | Financial assets at amortised cost | UK
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 8,564		£ 7,983
Coverage ratio	0.013		0.014
Retail credit cards | Stage 1 | Financial assets at amortised cost | Rest of the world
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 | Stage 1 | Financial assets at amortised cost | Gross exposure
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 30,439		£ 30,409
Retail credit cards | Stage 1 | Financial assets at amortised cost | Gross exposure | UK
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	8,673		8,094
Retail credit cards | Stage 1 | Financial assets at amortised cost | Gross exposure | Rest of the world
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
Retail credit cards | Stage 1 | Financial assets at amortised cost | Impairment allowance
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	508		523
Retail credit cards | Stage 1 | Financial assets at amortised cost | Impairment allowance | UK
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	109		111
Retail credit cards | Stage 1 | Financial assets at amortised cost | Impairment allowance | Rest of the world
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
Retail credit cards | Lifetime expected credit losses | Stage 2 | Gross exposure
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	2,705		2,807
Retail credit cards | Lifetime expected credit losses | Stage 2 | Impairment allowance
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	36		54
Retail credit cards | Lifetime expected credit losses | Stage 2 | 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	£ 3,812		£ 3,948
Coverage ratio	0.287		0.292
Retail credit cards | Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | UK
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 1,562		£ 1,636
Coverage ratio	0.227		0.231
Retail credit cards | Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Rest of the world
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 | Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 5,346		£ 5,578
Retail credit cards | Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure | UK
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	2,021		2,128
Retail credit cards | Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure | Rest of the world
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
Retail credit cards | Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	1,534		1,630
Retail credit cards | Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance | UK
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	459		492
Retail credit cards | Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance | Rest of the world
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
Retail credit cards | Lifetime expected credit losses | Stage 3 | Gross exposure
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	139		142
Retail credit cards | Lifetime expected credit losses | Stage 3 | Impairment allowance
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	0		0
Retail credit cards | Lifetime expected credit losses | Stage 3 | 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	£ 436		£ 387
Coverage ratio	0.786		0.775
Retail credit cards | Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | UK
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 99		£ 91
Coverage ratio	0.490		0.540
Retail credit cards | Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Rest of the world
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 credit cards | Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Gross exposure
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 2,038		£ 1,720
Retail credit cards | Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Gross exposure | UK
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	194		198
Retail credit cards | Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Gross exposure | Rest of the world
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
Retail credit cards | Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Impairment allowance
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	1,602		1,333
Retail credit cards | Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Impairment allowance | UK
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	95		107
Retail credit cards | Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Impairment allowance | Rest of the world
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
Retail other | Gross exposure
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	9,070		9,186
Retail other | Impairment allowance
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	6		8
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	£ 9,767		£ 9,952
Coverage ratio	0.033		0.034
Retail other | Financial assets at amortised cost | UK
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 7,885		£ 8,031
Coverage ratio	0.037		0.038
Retail other | Financial assets at amortised cost | Rest of the world
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 1,882		£ 1,921
Coverage ratio	0.015		0.018
Retail other | Financial assets at amortised cost | Gross exposure
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 10,101		£ 10,305
Retail other | Financial assets at amortised cost | Gross exposure | UK
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	8,190		8,348
Retail other | Financial assets at amortised cost | Gross exposure | Rest of the world
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	1,911		1,957
Retail other | Financial assets at amortised cost | Impairment allowance
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	334		353
Retail other | Financial assets at amortised cost | Impairment allowance | UK
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	305		317
Retail other | Financial assets at amortised cost | Impairment allowance | Rest of the world
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	29		36
Retail other | Stage 1 | Gross exposure
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	8,469		8,607
Retail other | Stage 1 | Impairment allowance
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	6		6
Retail other | Stage 1 | 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	£ 8,338		£ 8,410
Coverage ratio	0.006		0.007
Retail other | Stage 1 | Financial assets at amortised cost | UK
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 6,722		£ 6,776
Coverage ratio	0.008		0.008
Retail other | Stage 1 | Financial assets at amortised cost | Rest of the world
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 1,616		£ 1,634
Coverage ratio	0.001		0.002
Retail other | Stage 1 | Financial assets at amortised cost | Gross exposure
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 8,391		£ 8,469
Retail other | Stage 1 | Financial assets at amortised cost | Gross exposure | UK
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	6,773		6,832
Retail other | Stage 1 | Financial assets at amortised cost | Gross exposure | Rest of the world
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	1,618		1,637
Retail other | Stage 1 | Financial assets at amortised cost | Impairment allowance
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	53		59
Retail other | Stage 1 | Financial assets at amortised cost | Impairment allowance | UK
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	51		56
Retail other | Stage 1 | Financial assets at amortised cost | Impairment allowance | Rest of the world
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	2		3
Retail other | Lifetime expected credit losses | Stage 2 | Gross exposure
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	567		535
Retail other | Lifetime expected credit losses | Stage 2 | Impairment allowance
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	0		2
Retail other | Lifetime expected credit losses | Stage 2 | 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	£ 1,199		£ 1,225
Coverage ratio	0.086		0.088
Retail other | Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | UK
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 1,069		£ 1,135
Coverage ratio	0.095		0.093
Retail other | Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Rest of the world
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 130		£ 90
Coverage ratio	0.008		0.011
Retail other | Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 1,312		£ 1,343
Retail other | Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure | UK
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	1,181		1,252
Retail other | Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure | Rest of the world
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	131		91
Retail other | Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	113		118
Retail other | Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance | UK
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	112		117
Retail other | Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance | Rest of the world
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	1		1
Retail other | Lifetime expected credit losses | Stage 3 | Gross exposure
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	34		44
Retail other | Lifetime expected credit losses | Stage 3 | Impairment allowance
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	0		0
Retail other | Lifetime expected credit losses | Stage 3 | 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	£ 230		£ 317
Coverage ratio	0.422		0.357
Retail other | Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | UK
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 94		£ 120
Coverage ratio	0.602		0.545
Retail other | Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Rest of the world
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 136		£ 197
Coverage ratio	0.160		0.140
Retail other | Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Gross exposure
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 398		£ 493
Retail other | Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Gross exposure | UK
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	236		264
Retail other | Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Gross exposure | Rest of the world
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	162		229
Retail other | Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Impairment allowance
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	168		176
Retail other | Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Impairment allowance | UK
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	142		144
Retail other | Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Impairment allowance | Rest of the world
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	26		32
Corporate loans | Gross exposure
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	239,290		234,154
Corporate loans | Impairment allowance
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	363		383
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	£ 127,721		£ 127,062
Coverage ratio	0.010		0.010
Corporate loans | Financial assets at amortised cost | UK
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 60,034		£ 63,871
Coverage ratio	0.011		0.012
Corporate loans | Financial assets at amortised cost | Rest of the world
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 67,687		£ 63,191
Coverage ratio	0.008		0.009
Corporate loans | Financial assets at amortised cost | Gross exposure
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 128,947		£ 128,361
Corporate loans | Financial assets at amortised cost | Gross exposure | UK
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	60,704		64,622
Corporate loans | Financial assets at amortised cost | Gross exposure | UK | Business Banking
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	14,100		15,200
Corporate loans | Financial assets at amortised cost | Gross exposure | Rest of the world
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	68,243		63,739
Corporate loans | Financial assets at amortised cost | Impairment allowance
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	1,226		1,299
Corporate loans | Financial assets at amortised cost | Impairment allowance | UK
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	670		751
Corporate loans | Financial assets at amortised cost | Impairment allowance | UK | Business Banking
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 367		£ 431
Coverage ratio	0.007		0.006
Corporate loans | Financial assets at amortised cost | Impairment allowance | Rest of the world
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 556		£ 548
Corporate loans | Stage 1 | Gross exposure
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	222,148		212,889
Corporate loans | Stage 1 | Impairment allowance
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	111		108
Corporate loans | Stage 1 | 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	£ 113,860		£ 112,218
Coverage ratio	0.002		0.003
Corporate loans | Stage 1 | Financial assets at amortised cost | UK
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 50,754		£ 54,066
Coverage ratio	0.003		0.004
Corporate loans | Stage 1 | Financial assets at amortised cost | Rest of the world
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 63,106		£ 58,152
Coverage ratio	0.001		0.002
Corporate loans | Stage 1 | Financial assets at amortised cost | Gross exposure
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 114,110		£ 112,505
Corporate loans | Stage 1 | Financial assets at amortised cost | Gross exposure | UK
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	50,913		54,257
Corporate loans | Stage 1 | Financial assets at amortised cost | Gross exposure | UK | Business Banking
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	9,600		9,800
Corporate loans | Stage 1 | Financial assets at amortised cost | Gross exposure | Rest of the world
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	63,197		58,248
Corporate loans | Stage 1 | Financial assets at amortised cost | Impairment allowance
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	250		287
Corporate loans | Stage 1 | Financial assets at amortised cost | Impairment allowance | UK
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	159		191
Corporate loans | Stage 1 | Financial assets at amortised cost | Impairment allowance | UK | Business Banking
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	79		99
Corporate loans | Stage 1 | Financial assets at amortised cost | Impairment allowance | Rest of the world
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	91		96
Corporate loans | Lifetime expected credit losses | Stage 2 | Gross exposure
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	16,284		20,418
Corporate loans | Lifetime expected credit losses | Stage 2 | Impairment allowance
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	220		231
Corporate loans | Lifetime expected credit losses | Stage 2 | 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	£ 11,978		£ 12,888
Coverage ratio	0.028		0.031
Corporate loans | Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | UK
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 8,082		£ 8,459
Coverage ratio	0.022		0.025
Corporate loans | Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Rest of the world
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 3,896		£ 4,429
Coverage ratio	0.039		0.043
Corporate loans | Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 12,320		£ 13,302
Corporate loans | Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure | UK
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	8,266		8,673
Corporate loans | Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure | UK | Business Banking
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	3,300		4,100
Corporate loans | Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure | Rest of the world
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	4,054		4,629
Corporate loans | Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	342		414
Corporate loans | Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance | UK
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	184		214
Corporate loans | Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance | UK | Business Banking
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	53		81
Corporate loans | Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance | Rest of the world
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	158		200
Corporate loans | Lifetime expected credit losses | Stage 3 | Gross exposure
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	858		847
Corporate loans | Lifetime expected credit losses | Stage 3 | Impairment allowance
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	32		44
Corporate loans | Lifetime expected credit losses | Stage 3 | 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	£ 1,883		£ 1,956
Coverage ratio	0.252		0.234
Corporate loans | Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | UK
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 1,198		£ 1,346
Coverage ratio	0.214		0.204
Corporate loans | Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Rest of the world
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 685		£ 610
Coverage ratio	0.309		0.292
Corporate loans | Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Gross exposure
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 2,517		£ 2,554
Corporate loans | Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Gross exposure | UK
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	1,525		1,692
Corporate loans | Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Gross exposure | UK | Business Banking
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	1,200		1,300
Corporate loans | Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Gross exposure | Rest of the world
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	992		862
Corporate loans | Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Impairment allowance
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	634		598
Corporate loans | Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Impairment allowance | UK
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	327		346
Corporate loans | Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Impairment allowance | UK | Business Banking
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	235		251
Corporate loans | Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Impairment allowance | Rest of the world
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	307		252
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	£ 61,700		£ 56,749
Coverage ratio	0		0
Debt securities at amortised cost | Financial assets at amortised cost | Gross exposure
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 61,720		£ 56,776
Debt securities at amortised cost | Financial assets at amortised cost | Impairment allowance
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	20		27
Debt securities at amortised cost | Stage 1 | 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	£ 58,078		£ 52,858
Coverage ratio	0		0
Debt securities at amortised cost | Stage 1 | Financial assets at amortised cost | Gross exposure
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 58,088		£ 52,869
Debt securities at amortised cost | Stage 1 | Financial assets at amortised cost | Impairment allowance
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	10		11
Debt securities at amortised cost | Lifetime expected credit losses | Stage 2 | 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	£ 3,622		£ 3,891
Coverage ratio	0.003		0.004
Debt securities at amortised cost | Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 3,632		£ 3,907
Debt securities at amortised cost | Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	10		16
Debt securities at amortised cost | Lifetime expected credit losses | Stage 3 | 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	£ 0		£ 0
Coverage ratio	0		0
Debt securities at amortised cost | Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Gross exposure
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
Debt securities at amortised cost | Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Impairment allowance
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
Off balance sheet loan commitments and financial guarantee contracts
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 410,612		£ 398,804
Coverage ratio	0.001		0.001
Off balance sheet loan commitments and financial guarantee contracts | Gross exposure
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 411,086		£ 399,308
Off balance sheet loan commitments and financial guarantee contracts | Impairment allowance
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	474		504
Off balance sheet loan commitments and financial guarantee contracts | 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	£ 389,918		£ 373,890
Coverage ratio	0		0
Off balance sheet loan commitments and financial guarantee contracts | Stage 1 | Gross exposure
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 390,104		£ 374,063
Off balance sheet loan commitments and financial guarantee contracts | Stage 1 | Impairment allowance
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	186		173
Off balance sheet loan commitments and financial guarantee contracts | 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	£ 19,692		£ 23,921
Coverage ratio	0.013		0.012
Off balance sheet loan commitments and financial guarantee contracts | Lifetime expected credit losses | Stage 2 | Gross exposure
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 19,948		£ 24,208
Off balance sheet loan commitments and financial guarantee contracts | Lifetime expected credit losses | Stage 2 | Impairment allowance
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	256		287
Off balance sheet loan commitments and financial guarantee contracts | 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	£ 1,002		£ 993
Coverage ratio	0.031		0.042
Off balance sheet loan commitments and financial guarantee contracts | Lifetime expected credit losses | Stage 3 | Gross exposure
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		£ 1,037
Off balance sheet loan commitments and financial guarantee contracts | Lifetime expected credit losses | Stage 3 | Impairment allowance
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	32		44
Other financial assets subject to impairment | Gross exposure
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	228,400		183,600
Other financial assets subject to impairment | Impairment allowance
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	154		151
Other financial assets subject to impairment | Stage 1 | Gross exposure
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	227,200		182,800
Other financial assets subject to impairment | Stage 1 | Impairment allowance
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	18		16
Other financial assets subject to impairment | Lifetime expected credit losses | Stage 2 | Gross exposure
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	1,100		600
Other financial assets subject to impairment | Lifetime expected credit losses | Stage 2 | Impairment allowance
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
Other financial assets subject to impairment | Lifetime expected credit losses | Stage 3 | Gross exposure
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	140		140
Other financial assets subject to impairment | Lifetime expected credit losses | Stage 3 | Impairment allowance
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 133		£ 133

Credit Risk - Assets held for s

Credit Risk - Assets held for sale (Details) £ in Millions	Jun. 30, 2024 GBP (£)	Dec. 31, 2023 GBP (£)
Impairment allowance
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ (6,198)	£ (6,252)
German Consumer Finance Portfolio | Non-current assets/liabilities held for sale | Retail credit cards | Rest of the world
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
German Consumer Finance Portfolio | Non-current assets/liabilities held for sale | Retail credit cards | Stage 1 | Rest of the world
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
German Consumer Finance Portfolio | Non-current assets/liabilities held for sale | Retail credit cards | Lifetime expected credit losses | Stage 2 | Rest of the world
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
German Consumer Finance Portfolio | Non-current assets/liabilities held for sale | Retail credit cards | Lifetime expected credit losses | Stage 3 | Rest of the world
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
German Consumer Finance Portfolio | Non-current assets/liabilities held for sale | Retail other | Rest of the world
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
German Consumer Finance Portfolio | Non-current assets/liabilities held for sale | Retail other | Stage 1 | Rest of the world
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
German Consumer Finance Portfolio | Non-current assets/liabilities held for sale | Retail other | Lifetime expected credit losses | Stage 2 | Rest of the world
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
German Consumer Finance Portfolio | Non-current assets/liabilities held for sale | Retail other | Lifetime expected credit losses | Stage 3 | Rest of the world
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
German Consumer Finance Portfolio | Non-current assets/liabilities held for sale | Loans and advances | Rest of the world
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
German Consumer Finance Portfolio | Non-current assets/liabilities held for sale | Loans and advances | Stage 1 | Rest of the world
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
German Consumer Finance Portfolio | Non-current assets/liabilities held for sale | Loans and advances | Lifetime expected credit losses | Stage 2 | Rest of the world
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
German Consumer Finance Portfolio | Non-current assets/liabilities held for sale | Loans and advances | Lifetime expected credit losses | Stage 3 | Rest of the world
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
German Consumer Finance Portfolio | Non-current assets/liabilities held for sale | Gross exposure | Retail credit cards | Rest of the world
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
German Consumer Finance Portfolio | Non-current assets/liabilities held for sale | Gross exposure | Retail credit cards | Stage 1 | Rest of the world
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
German Consumer Finance Portfolio | Non-current assets/liabilities held for sale | Gross exposure | Retail credit cards | Lifetime expected credit losses | Stage 2 | Rest of the world
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
German Consumer Finance Portfolio | Non-current assets/liabilities held for sale | Gross exposure | Retail credit cards | Lifetime expected credit losses | Stage 3 | Rest of the world
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
German Consumer Finance Portfolio | Non-current assets/liabilities held for sale | Gross exposure | Retail other | Rest of the world
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
German Consumer Finance Portfolio | Non-current assets/liabilities held for sale | Gross exposure | Retail other | Stage 1 | Rest of the world
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
German Consumer Finance Portfolio | Non-current assets/liabilities held for sale | Gross exposure | Retail other | Lifetime expected credit losses | Stage 2 | Rest of the world
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
German Consumer Finance Portfolio | Non-current assets/liabilities held for sale | Gross exposure | Retail other | Lifetime expected credit losses | Stage 3 | Rest of the world
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
German Consumer Finance Portfolio | Non-current assets/liabilities held for sale | Gross exposure | Loans and advances | Rest of the world
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
German Consumer Finance Portfolio | Non-current assets/liabilities held for sale | Gross exposure | Loans and advances | Stage 1 | Rest of the world
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
German Consumer Finance Portfolio | Non-current assets/liabilities held for sale | Gross exposure | Loans and advances | Lifetime expected credit losses | Stage 2 | Rest of the world
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
German Consumer Finance Portfolio | Non-current assets/liabilities held for sale | Gross exposure | Loans and advances | Lifetime expected credit losses | Stage 3 | Rest of the world
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
German Consumer Finance Portfolio | Non-current assets/liabilities held for sale | Impairment allowance | Retail credit cards | Rest of the world
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
German Consumer Finance Portfolio | Non-current assets/liabilities held for sale | Impairment allowance | Retail credit cards | Stage 1 | Rest of the world
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
German Consumer Finance Portfolio | Non-current assets/liabilities held for sale | Impairment allowance | Retail credit cards | Lifetime expected credit losses | Stage 2 | Rest of the world
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
German Consumer Finance Portfolio | Non-current assets/liabilities held for sale | Impairment allowance | Retail credit cards | Lifetime expected credit losses | Stage 3 | Rest of the world
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
German Consumer Finance Portfolio | Non-current assets/liabilities held for sale | Impairment allowance | Retail other | Rest of the world
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
German Consumer Finance Portfolio | Non-current assets/liabilities held for sale | Impairment allowance | Retail other | Stage 1 | Rest of the world
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
German Consumer Finance Portfolio | Non-current assets/liabilities held for sale | Impairment allowance | Retail other | Lifetime expected credit losses | Stage 2 | Rest of the world
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
German Consumer Finance Portfolio | Non-current assets/liabilities held for sale | Impairment allowance | Retail other | Lifetime expected credit losses | Stage 3 | Rest of the world
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
German Consumer Finance Portfolio | Non-current assets/liabilities held for sale | Impairment allowance | Loans and advances | Rest of the world
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
German Consumer Finance Portfolio | Non-current assets/liabilities held for sale | Impairment allowance | Loans and advances | Stage 1 | Rest of the world
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
German Consumer Finance Portfolio | Non-current assets/liabilities held for sale | Impairment allowance | Loans and advances | Lifetime expected credit losses | Stage 2 | Rest of the world
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
German Consumer Finance Portfolio | Non-current assets/liabilities held for sale | Impairment allowance | Loans and advances | Lifetime expected credit losses | Stage 3 | Rest of the world
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

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 (£)
Impairment allowance
Disclosure of financial assets [line items]
Financial assets	£ (6,198)	£ (6,252)
Financial assets at amortised cost | Loans and advances
Disclosure of financial assets [line items]
Financial assets	£ 337,809	£ 342,747
Coverage ratio	0.017	0.016
Financial assets at amortised cost | Retail mortgages
Disclosure of financial assets [line items]
Financial assets	£ 166,142	£ 171,512
Coverage ratio	0.003	0.003
Financial assets at amortised cost | Retail credit cards
Disclosure of financial assets [line items]
Financial assets	£ 34,179	£ 34,221
Coverage ratio	0.096	0.092
Financial assets at amortised cost | Retail other
Disclosure of financial assets [line items]
Financial assets	£ 9,767	£ 9,952
Coverage ratio	0.033	0.034
Financial assets at amortised cost | Corporate loans
Disclosure of financial assets [line items]
Financial assets	£ 127,721	£ 127,062
Coverage ratio	0.010	0.010
Financial assets at amortised cost | Gross exposure | Loans and advances
Disclosure of financial assets [line items]
Financial assets	£ 343,513	£ 348,468
Financial assets at amortised cost | Gross exposure | Retail mortgages
Disclosure of financial assets [line items]
Financial assets	166,642	172,095
Financial assets at amortised cost | Gross exposure | Retail credit cards
Disclosure of financial assets [line items]
Financial assets	37,823	37,707
Financial assets at amortised cost | Gross exposure | Retail other
Disclosure of financial assets [line items]
Financial assets	10,101	10,305
Financial assets at amortised cost | Gross exposure | Corporate loans
Disclosure of financial assets [line items]
Financial assets	128,947	128,361
Financial assets at amortised cost | Impairment allowance | Loans and advances
Disclosure of financial assets [line items]
Financial assets	5,704	5,721
Financial assets at amortised cost | Impairment allowance | Retail mortgages
Disclosure of financial assets [line items]
Financial assets	500	583
Financial assets at amortised cost | Impairment allowance | Retail credit cards
Disclosure of financial assets [line items]
Financial assets	3,644	3,486
Financial assets at amortised cost | Impairment allowance | Retail other
Disclosure of financial assets [line items]
Financial assets	334	353
Financial assets at amortised cost | Impairment allowance | Corporate loans
Disclosure of financial assets [line items]
Financial assets	1,226	1,299
Stage 1 | Financial assets at amortised cost | Loans and advances
Disclosure of financial assets [line items]
Financial assets	£ 295,681	£ 300,666
Coverage ratio	0.003	0.003
Stage 1 | Financial assets at amortised cost | Retail mortgages
Disclosure of financial assets [line items]
Financial assets	£ 143,552	£ 150,152
Coverage ratio	0	0
Stage 1 | Financial assets at amortised cost | Retail credit cards
Disclosure of financial assets [line items]
Financial assets	£ 29,931	£ 29,886
Coverage ratio	0.017	0.017
Stage 1 | Financial assets at amortised cost | Retail other
Disclosure of financial assets [line items]
Financial assets	£ 8,338	£ 8,410
Coverage ratio	0.006	0.007
Stage 1 | Financial assets at amortised cost | Corporate loans
Disclosure of financial assets [line items]
Financial assets	£ 113,860	£ 112,218
Coverage ratio	0.002	0.003
Stage 1 | Financial assets at amortised cost | Gross exposure | Loans and advances
Disclosure of financial assets [line items]
Financial assets	£ 296,533	£ 301,585
Stage 1 | Financial assets at amortised cost | Gross exposure | Retail mortgages
Disclosure of financial assets [line items]
Financial assets	143,593	150,202
Stage 1 | Financial assets at amortised cost | Gross exposure | Retail credit cards
Disclosure of financial assets [line items]
Financial assets	30,439	30,409
Stage 1 | Financial assets at amortised cost | Gross exposure | Retail other
Disclosure of financial assets [line items]
Financial assets	8,391	8,469
Stage 1 | Financial assets at amortised cost | Gross exposure | Corporate loans
Disclosure of financial assets [line items]
Financial assets	114,110	112,505
Stage 1 | Financial assets at amortised cost | Impairment allowance | Loans and advances
Disclosure of financial assets [line items]
Financial assets	852	919
Stage 1 | Financial assets at amortised cost | Impairment allowance | Retail mortgages
Disclosure of financial assets [line items]
Financial assets	41	50
Stage 1 | Financial assets at amortised cost | Impairment allowance | Retail credit cards
Disclosure of financial assets [line items]
Financial assets	508	523
Stage 1 | Financial assets at amortised cost | Impairment allowance | Retail other
Disclosure of financial assets [line items]
Financial assets	53	59
Stage 1 | Financial assets at amortised cost | Impairment allowance | Corporate loans
Disclosure of financial assets [line items]
Financial assets	250	287
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Loans and advances
Disclosure of financial assets [line items]
Financial assets	£ 37,757	£ 37,425
Coverage ratio	0.052	0.057
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Retail mortgages
Disclosure of financial assets [line items]
Financial assets	£ 20,768	£ 19,364
Coverage ratio	0.004	0.005
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Retail credit cards
Disclosure of financial assets [line items]
Financial assets	£ 3,812	£ 3,948
Coverage ratio	0.287	0.292
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Retail other
Disclosure of financial assets [line items]
Financial assets	£ 1,199	£ 1,225
Coverage ratio	0.086	0.088
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Corporate loans
Disclosure of financial assets [line items]
Financial assets	£ 11,978	£ 12,888
Coverage ratio	0.028	0.031
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Not past due | Loans and advances
Disclosure of financial assets [line items]
Financial assets	£ 34,106	£ 33,935
Coverage ratio	0.046	0.051
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Not past due | Retail mortgages
Disclosure of financial assets [line items]
Financial assets	£ 17,935	£ 16,761
Coverage ratio	0.002	0.004
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Not past due | Retail credit cards
Disclosure of financial assets [line items]
Financial assets	£ 3,494	£ 3,601
Coverage ratio	0.254	0.259
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Not past due | Retail other
Disclosure of financial assets [line items]
Financial assets	£ 987	£ 1,012
Coverage ratio	0.073	0.075
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Not past due | Corporate loans
Disclosure of financial assets [line items]
Financial assets	£ 11,690	£ 12,561
Coverage ratio	0.027	0.031
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Not later than 30 days past due | Loans and advances
Disclosure of financial assets [line items]
Financial assets	£ 2,384	£ 2,456
Coverage ratio	0.077	0.079
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Not later than 30 days past due | Retail mortgages
Disclosure of financial assets [line items]
Financial assets	£ 2,038	£ 1,951
Coverage ratio	0.008	0.010
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Not later than 30 days past due | Retail credit cards
Disclosure of financial assets [line items]
Financial assets	£ 207	£ 226
Coverage ratio	0.436	0.423
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Not later than 30 days past due | Retail other
Disclosure of financial assets [line items]
Financial assets	£ 89	£ 108
Coverage ratio	0.160	0.143
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Not later than 30 days past due | Corporate loans
Disclosure of financial assets [line items]
Financial assets	£ 50	£ 171
Coverage ratio	0.123	0.045
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | >30 days past due | Loans and advances
Disclosure of financial assets [line items]
Financial assets	£ 1,267	£ 1,034
Coverage ratio	0.153	0.191
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | >30 days past due | Retail mortgages
Disclosure of financial assets [line items]
Financial assets	£ 795	£ 652
Coverage ratio	0.025	0.018
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | >30 days past due | Retail credit cards
Disclosure of financial assets [line items]
Financial assets	£ 111	£ 121
Coverage ratio	0.622	0.631
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | >30 days past due | Retail other
Disclosure of financial assets [line items]
Financial assets	£ 123	£ 105
Coverage ratio	0.128	0.146
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | >30 days past due | Corporate loans
Disclosure of financial assets [line items]
Financial assets	£ 238	£ 156
Coverage ratio	0.033	0.043
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure | Loans and advances
Disclosure of financial assets [line items]
Financial assets	£ 39,826	£ 39,692
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure | Retail mortgages
Disclosure of financial assets [line items]
Financial assets	20,848	19,469
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure | Retail credit cards
Disclosure of financial assets [line items]
Financial assets	5,346	5,578
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure | Retail other
Disclosure of financial assets [line items]
Financial assets	1,312	1,343
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure | Corporate loans
Disclosure of financial assets [line items]
Financial assets	12,320	13,302
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure | Not past due | Loans and advances
Disclosure of financial assets [line items]
Financial assets	35,746	35,746
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure | Not past due | Retail mortgages
Disclosure of financial assets [line items]
Financial assets	17,979	16,834
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure | Not past due | Retail credit cards
Disclosure of financial assets [line items]
Financial assets	4,685	4,858
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure | Not past due | Retail other
Disclosure of financial assets [line items]
Financial assets	1,065	1,094
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure | Not past due | Corporate loans
Disclosure of financial assets [line items]
Financial assets	12,017	12,960
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure | Not later than 30 days past due | Loans and advances
Disclosure of financial assets [line items]
Financial assets	2,584	2,668
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure | Not later than 30 days past due | Retail mortgages
Disclosure of financial assets [line items]
Financial assets	2,054	1,971
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure | Not later than 30 days past due | Retail credit cards
Disclosure of financial assets [line items]
Financial assets	367	392
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure | Not later than 30 days past due | Retail other
Disclosure of financial assets [line items]
Financial assets	106	126
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure | Not later than 30 days past due | Corporate loans
Disclosure of financial assets [line items]
Financial assets	57	179
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure | >30 days past due | Loans and advances
Disclosure of financial assets [line items]
Financial assets	1,496	1,278
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure | >30 days past due | Retail mortgages
Disclosure of financial assets [line items]
Financial assets	815	664
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure | >30 days past due | Retail credit cards
Disclosure of financial assets [line items]
Financial assets	294	328
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure | >30 days past due | Retail other
Disclosure of financial assets [line items]
Financial assets	141	123
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure | >30 days past due | Corporate loans
Disclosure of financial assets [line items]
Financial assets	246	163
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance | Loans and advances
Disclosure of financial assets [line items]
Financial assets	2,069	2,267
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance | Retail mortgages
Disclosure of financial assets [line items]
Financial assets	80	105
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance | Retail credit cards
Disclosure of financial assets [line items]
Financial assets	1,534	1,630
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance | Retail other
Disclosure of financial assets [line items]
Financial assets	113	118
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance | Corporate loans
Disclosure of financial assets [line items]
Financial assets	342	414
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance | Not past due | Loans and advances
Disclosure of financial assets [line items]
Financial assets	1,640	1,811
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance | Not past due | Retail mortgages
Disclosure of financial assets [line items]
Financial assets	44	73
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance | Not past due | Retail credit cards
Disclosure of financial assets [line items]
Financial assets	1,191	1,257
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance | Not past due | Retail other
Disclosure of financial assets [line items]
Financial assets	78	82
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance | Not past due | Corporate loans
Disclosure of financial assets [line items]
Financial assets	327	399
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance | Not later than 30 days past due | Loans and advances
Disclosure of financial assets [line items]
Financial assets	200	212
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance | Not later than 30 days past due | Retail mortgages
Disclosure of financial assets [line items]
Financial assets	16	20
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance | Not later than 30 days past due | Retail credit cards
Disclosure of financial assets [line items]
Financial assets	160	166
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance | Not later than 30 days past due | Retail other
Disclosure of financial assets [line items]
Financial assets	17	18
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance | Not later than 30 days past due | Corporate loans
Disclosure of financial assets [line items]
Financial assets	7	8
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance | >30 days past due | Loans and advances
Disclosure of financial assets [line items]
Financial assets	229	244
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance | >30 days past due | Retail mortgages
Disclosure of financial assets [line items]
Financial assets	20	12
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance | >30 days past due | Retail credit cards
Disclosure of financial assets [line items]
Financial assets	183	207
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance | >30 days past due | Retail other
Disclosure of financial assets [line items]
Financial assets	18	18
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance | >30 days past due | Corporate loans
Disclosure of financial assets [line items]
Financial assets	8	7
Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Loans and advances
Disclosure of financial assets [line items]
Financial assets	£ 4,371	£ 4,656
Coverage ratio	0.389	0.353
Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Retail mortgages
Disclosure of financial assets [line items]
Financial assets	£ 1,822	£ 1,996
Coverage ratio	0.172	0.177
Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Retail credit cards
Disclosure of financial assets [line items]
Financial assets	£ 436	£ 387
Coverage ratio	0.786	0.775
Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Retail other
Disclosure of financial assets [line items]
Financial assets	£ 230	£ 317
Coverage ratio	0.422	0.357
Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Corporate loans
Disclosure of financial assets [line items]
Financial assets	£ 1,883	£ 1,956
Coverage ratio	0.252	0.234
Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Gross exposure | Loans and advances
Disclosure of financial assets [line items]
Financial assets	£ 7,154	£ 7,191
Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Gross exposure | Retail mortgages
Disclosure of financial assets [line items]
Financial assets	2,201	2,424
Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Gross exposure | Retail credit cards
Disclosure of financial assets [line items]
Financial assets	2,038	1,720
Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Gross exposure | Retail other
Disclosure of financial assets [line items]
Financial assets	398	493
Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Gross exposure | Corporate loans
Disclosure of financial assets [line items]
Financial assets	2,517	2,554
Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Impairment allowance | Loans and advances
Disclosure of financial assets [line items]
Financial assets	2,783	2,535
Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Impairment allowance | Retail mortgages
Disclosure of financial assets [line items]
Financial assets	379	428
Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Impairment allowance | Retail credit cards
Disclosure of financial assets [line items]
Financial assets	1,602	1,333
Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Impairment allowance | Retail other
Disclosure of financial assets [line items]
Financial assets	168	176
Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Impairment allowance | Corporate loans
Disclosure of financial assets [line items]
Financial assets	£ 634	£ 598

Credit Risk - Movement in gross

Credit Risk - Movement in gross exposures and impairment allowance including provisions for loan commitments and financial guarantees (Details) - GBP (£) £ in Millions	6 Months Ended		12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Loans and advances at amortised cost
Opening balance	£ 6,252
Closing balance	6,198		£ 6,252
Reconciliation of ECL movement to impairment charge/(release) for the period
Recoveries and reimbursements	56
ECL charge on assets held for sale	44
Total exchange and other adjustments	(27)
Total income statement charge for the period	897	£ 896	1,881
Financial guarantee contracts
Reconciliation of ECL movement to impairment charge/(release) for the period
Net release in ECL	18	3
Loans and advances
Loans and advances at amortised cost
Opening balance	6,225
Closing balance	6,178		6,225
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	970
Loans and advances | UK
Loans and advances at amortised cost
Opening balance	2,132
Closing balance	1,975		2,132
Retail mortgages
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	(7)
Retail mortgages | UK
Loans and advances at amortised cost
Opening balance	232
Closing balance	220		232
Retail credit cards
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	862
Retail credit cards | UK
Loans and advances at amortised cost
Opening balance	736
Closing balance	684		736
Retail other
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	52
Retail other | UK
Loans and advances at amortised cost
Opening balance	322
Closing balance	310		322
Corporate loans
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	63
Corporate loans | UK
Loans and advances at amortised cost
Opening balance	842
Closing balance	761		842
ECL movement on loan commitments and other financial guarantees
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	(30)
ECL movement on other financial assets
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	3
Debt securities at amortised cost
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	(7)
Gross exposure | Retail mortgages
Loans and advances at amortised cost
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(4,351)
Gross exposure | Retail credit cards
Loans and advances at amortised cost
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	2,134
Disposals	(954)
Gross exposure | Retail other
Loans and advances at amortised cost
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(36)
Gross exposure | Corporate loans
Loans and advances at amortised cost
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	5,321
Impairment allowance | Retail mortgages
Loans and advances at amortised cost
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	0
Impairment allowance | Retail credit cards
Loans and advances at amortised cost
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(6)
Impairment allowance | Retail other
Loans and advances at amortised cost
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(3)
Impairment allowance | Corporate loans
Loans and advances at amortised cost
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(6)
Impairment allowance | Corporate loans | Loans to government
Reconciliation of ECL movement to impairment charge/(release) for the period
Increase (decrease) through modification of contractual cash flows, financial assets	300
Financial assets at amortised cost | Loans and advances
Loans and advances at amortised cost
Write-offs	(760)	(583)
Reconciliation of ECL movement to impairment charge/(release) for the period
Gross write-offs	760	583
Post write-off recoveries	38	21
Net write-offs	722	£ 562
Financial assets at amortised cost | Gross exposure | Retail mortgages
Loans and advances at amortised cost
Opening balance	172,095
Business activity in the period	9,301
Refinements to models used for calculation	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(4,436)
Final repayments	(7,386)
Disposals	(2,922)
Write-offs	(10)
Closing balance	166,642		172,095
Reconciliation of ECL movement to impairment charge/(release) for the period
Gross write-offs	10
Financial assets at amortised cost | Gross exposure | Retail mortgages | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	0
Financial assets at amortised cost | Gross exposure | Retail mortgages | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	0
Financial assets at amortised cost | Gross exposure | Retail mortgages | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	0
Financial assets at amortised cost | Gross exposure | Retail mortgages | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	0
Financial assets at amortised cost | Gross exposure | Retail credit cards
Loans and advances at amortised cost
Opening balance	37,707
Business activity in the period	1,620
Refinements to models used for calculation	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	112
Final repayments	(99)
Disposals	(954)
Write-offs	(563)
Closing balance	37,823		37,707
Reconciliation of ECL movement to impairment charge/(release) for the period
Gross write-offs	563
Financial assets at amortised cost | Gross exposure | Retail credit cards | US
Loans and advances at amortised cost
Disposals	(876)
Financial assets at amortised cost | Gross exposure | Retail credit cards | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	0
Financial assets at amortised cost | Gross exposure | Retail credit cards | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	0
Financial assets at amortised cost | Gross exposure | Retail credit cards | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	0
Financial assets at amortised cost | Gross exposure | Retail credit cards | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	0
Financial assets at amortised cost | Gross exposure | Retail other
Loans and advances at amortised cost
Opening balance	10,305
Business activity in the period	2,215
Refinements to models used for calculation	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(368)
Final repayments	(1,974)
Disposals	(24)
Write-offs	(53)
Closing balance	10,101		10,305
Reconciliation of ECL movement to impairment charge/(release) for the period
Gross write-offs	53
Financial assets at amortised cost | Gross exposure | Retail other | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	0
Financial assets at amortised cost | Gross exposure | Retail other | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	0
Financial assets at amortised cost | Gross exposure | Retail other | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	0
Financial assets at amortised cost | Gross exposure | Retail other | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	0
Financial assets at amortised cost | Gross exposure | Corporate loans
Loans and advances at amortised cost
Opening balance	128,361
Business activity in the period	16,528
Refinements to models used for calculation	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	3,918
Final repayments	(19,691)
Disposals	(35)
Write-offs	(134)
Closing balance	128,947		128,361
Reconciliation of ECL movement to impairment charge/(release) for the period
Gross write-offs	134
Financial assets at amortised cost | Gross exposure | Corporate loans | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	0
Financial assets at amortised cost | Gross exposure | Corporate loans | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	0
Financial assets at amortised cost | Gross exposure | Corporate loans | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	0
Financial assets at amortised cost | Gross exposure | Corporate loans | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	0
Financial assets at amortised cost | Impairment allowance | Retail mortgages
Loans and advances at amortised cost
Opening balance	583
Business activity in the period	4
Refinements to models used for calculation	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	10
Final repayments	(21)
Disposals	(66)
Write-offs	(10)
Closing balance	500		583
Reconciliation of ECL movement to impairment charge/(release) for the period
Gross write-offs	10
Financial assets at amortised cost | Impairment allowance | Retail mortgages | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	0
Financial assets at amortised cost | Impairment allowance | Retail mortgages | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	0
Financial assets at amortised cost | Impairment allowance | Retail mortgages | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	0
Financial assets at amortised cost | Impairment allowance | Retail mortgages | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	0
Financial assets at amortised cost | Impairment allowance | Retail credit cards
Loans and advances at amortised cost
Opening balance	3,486
Business activity in the period	55
Refinements to models used for calculation	13
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	809
Final repayments	(15)
Disposals	(141)
Write-offs	(563)
Closing balance	3,644		3,486
Reconciliation of ECL movement to impairment charge/(release) for the period
Gross write-offs	563
Financial assets at amortised cost | Impairment allowance | Retail credit cards | US
Loans and advances at amortised cost
Refinements to models used for calculation	43
Financial assets at amortised cost | Impairment allowance | Retail credit cards | UK
Loans and advances at amortised cost
Refinements to models used for calculation	30,000
Financial assets at amortised cost | Impairment allowance | Retail credit cards | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	0
Financial assets at amortised cost | Impairment allowance | Retail credit cards | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	0
Financial assets at amortised cost | Impairment allowance | Retail credit cards | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	0
Financial assets at amortised cost | Impairment allowance | Retail credit cards | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	0
Financial assets at amortised cost | Impairment allowance | Retail other
Loans and advances at amortised cost
Opening balance	353
Business activity in the period	26
Refinements to models used for calculation	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	55
Final repayments	(29)
Disposals	(18)
Write-offs	(53)
Closing balance	334		353
Reconciliation of ECL movement to impairment charge/(release) for the period
Gross write-offs	53
Financial assets at amortised cost | Impairment allowance | Retail other | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	0
Financial assets at amortised cost | Impairment allowance | Retail other | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	0
Financial assets at amortised cost | Impairment allowance | Retail other | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	0
Financial assets at amortised cost | Impairment allowance | Retail other | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	0
Financial assets at amortised cost | Impairment allowance | Corporate loans
Loans and advances at amortised cost
Opening balance	1,299
Business activity in the period	49
Refinements to models used for calculation	(12)
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	112
Final repayments	(86)
Disposals	(2)
Write-offs	(134)
Closing balance	1,226		1,299
Reconciliation of ECL movement to impairment charge/(release) for the period
Gross write-offs	134
Financial assets at amortised cost | Impairment allowance | Corporate loans | ESHLA
Loans and advances at amortised cost
Refinements to models used for calculation	(33)
Financial assets at amortised cost | Impairment allowance | Corporate loans | IB
Loans and advances at amortised cost
Refinements to models used for calculation	21
Financial assets at amortised cost | Impairment allowance | Corporate loans | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	0
Financial assets at amortised cost | Impairment allowance | Corporate loans | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	0
Financial assets at amortised cost | Impairment allowance | Corporate loans | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	0
Financial assets at amortised cost | Impairment allowance | Corporate loans | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	0
Debt securities at amortised cost | Gross exposure | Retail credit cards
Loans and advances at amortised cost
Disposals	(78)
Stage 1
Reconciliation of ECL movement to impairment charge/(release) for the period
Recoveries and reimbursements	31
Stage 1 | Loans and advances
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	(41)
Stage 1 | Retail mortgages
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	(4)
Stage 1 | Retail credit cards
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	5
Stage 1 | Retail other
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	(6)
Stage 1 | Corporate loans
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	(36)
Stage 1 | ECL movement on loan commitments and other financial guarantees
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	13
Stage 1 | ECL movement on other financial assets
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	2
Stage 1 | Debt securities at amortised cost
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	(1)
Stage 1 | Gross exposure | Retail mortgages
Loans and advances at amortised cost
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(4,289)
Stage 1 | Gross exposure | Retail credit cards
Loans and advances at amortised cost
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	3,106
Stage 1 | Gross exposure | Retail other
Loans and advances at amortised cost
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	11
Stage 1 | Gross exposure | Corporate loans
Loans and advances at amortised cost
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	4,879
Stage 1 | Impairment allowance | Retail mortgages
Loans and advances at amortised cost
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	0
Stage 1 | Impairment allowance | Retail credit cards
Loans and advances at amortised cost
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(24)
Stage 1 | Impairment allowance | Retail other
Loans and advances at amortised cost
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(1)
Stage 1 | Impairment allowance | Corporate loans
Loans and advances at amortised cost
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(40)
Stage 1 | Financial assets at amortised cost | Gross exposure | Retail mortgages
Loans and advances at amortised cost
Opening balance	150,202
Business activity in the period	9,077
Refinements to models used for calculation	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(3,874)
Final repayments	(6,149)
Disposals	(2,477)
Write-offs	0
Closing balance	143,593		150,202
Reconciliation of ECL movement to impairment charge/(release) for the period
Gross write-offs	0
Stage 1 | Financial assets at amortised cost | Gross exposure | Retail mortgages | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	(7,828)
Stage 1 | Financial assets at amortised cost | Gross exposure | Retail mortgages | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	4,688
Stage 1 | Financial assets at amortised cost | Gross exposure | Retail mortgages | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	(76)
Stage 1 | Financial assets at amortised cost | Gross exposure | Retail mortgages | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	30
Stage 1 | Financial assets at amortised cost | Gross exposure | Retail credit cards
Loans and advances at amortised cost
Opening balance	30,409
Business activity in the period	1,547
Refinements to models used for calculation	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(202)
Final repayments	(75)
Disposals	(699)
Write-offs	0
Closing balance	30,439		30,409
Reconciliation of ECL movement to impairment charge/(release) for the period
Gross write-offs	0
Stage 1 | Financial assets at amortised cost | Gross exposure | Retail credit cards | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	(1,898)
Stage 1 | Financial assets at amortised cost | Gross exposure | Retail credit cards | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	1,595
Stage 1 | Financial assets at amortised cost | Gross exposure | Retail credit cards | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	(250)
Stage 1 | Financial assets at amortised cost | Gross exposure | Retail credit cards | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	12
Stage 1 | Financial assets at amortised cost | Gross exposure | Retail other
Loans and advances at amortised cost
Opening balance	8,469
Business activity in the period	2,092
Refinements to models used for calculation	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(254)
Final repayments	(1,698)
Disposals	0
Write-offs	0
Closing balance	8,391		8,469
Reconciliation of ECL movement to impairment charge/(release) for the period
Gross write-offs	0
Stage 1 | Financial assets at amortised cost | Gross exposure | Retail other | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	(516)
Stage 1 | Financial assets at amortised cost | Gross exposure | Retail other | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	371
Stage 1 | Financial assets at amortised cost | Gross exposure | Retail other | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	(99)
Stage 1 | Financial assets at amortised cost | Gross exposure | Retail other | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	26
Stage 1 | Financial assets at amortised cost | Gross exposure | Corporate loans
Loans and advances at amortised cost
Opening balance	112,505
Business activity in the period	15,755
Refinements to models used for calculation	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	4,398
Final repayments	(18,303)
Disposals	(30)
Write-offs	0
Closing balance	114,110		112,505
Reconciliation of ECL movement to impairment charge/(release) for the period
Gross write-offs	0
Stage 1 | Financial assets at amortised cost | Gross exposure | Corporate loans | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	(2,905)
Stage 1 | Financial assets at amortised cost | Gross exposure | Corporate loans | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	2,769
Stage 1 | Financial assets at amortised cost | Gross exposure | Corporate loans | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	(244)
Stage 1 | Financial assets at amortised cost | Gross exposure | Corporate loans | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	165
Stage 1 | Financial assets at amortised cost | Impairment allowance | Retail mortgages
Loans and advances at amortised cost
Opening balance	50
Business activity in the period	3
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	(3)
Disposals	(5)
Write-offs	0
Closing balance	41		50
Reconciliation of ECL movement to impairment charge/(release) for the period
Gross write-offs	0
Stage 1 | Financial assets at amortised cost | Impairment allowance | Retail mortgages | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	(4)
Stage 1 | Financial assets at amortised cost | Impairment allowance | Retail mortgages | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	20
Stage 1 | Financial assets at amortised cost | Impairment allowance | Retail mortgages | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	(1)
Stage 1 | Financial assets at amortised cost | Impairment allowance | Retail mortgages | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	3
Stage 1 | Financial assets at amortised cost | Impairment allowance | Retail credit cards
Loans and advances at amortised cost
Opening balance	523
Business activity in the period	31
Refinements to models used for calculation	27
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(371)
Final repayments	(4)
Disposals	(20)
Write-offs	0
Closing balance	508		523
Reconciliation of ECL movement to impairment charge/(release) for the period
Gross write-offs	0
Stage 1 | Financial assets at amortised cost | Impairment allowance | Retail credit cards | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	(63)
Stage 1 | Financial assets at amortised cost | Impairment allowance | Retail credit cards | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	389
Stage 1 | Financial assets at amortised cost | Impairment allowance | Retail credit cards | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	(10)
Stage 1 | Financial assets at amortised cost | Impairment allowance | Retail credit cards | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	6
Stage 1 | Financial assets at amortised cost | Impairment allowance | Retail other
Loans and advances at amortised cost
Opening balance	59
Business activity in the period	13
Refinements to models used for calculation	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(28)
Final repayments	(7)
Disposals	0
Write-offs	0
Closing balance	53		59
Reconciliation of ECL movement to impairment charge/(release) for the period
Gross write-offs	0
Stage 1 | Financial assets at amortised cost | Impairment allowance | Retail other | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	(7)
Stage 1 | Financial assets at amortised cost | Impairment allowance | Retail other | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	23
Stage 1 | Financial assets at amortised cost | Impairment allowance | Retail other | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	(1)
Stage 1 | Financial assets at amortised cost | Impairment allowance | Retail other | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	1
Stage 1 | Financial assets at amortised cost | Impairment allowance | Corporate loans
Loans and advances at amortised cost
Opening balance	287
Business activity in the period	27
Refinements to models used for calculation	(21)
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(81)
Final repayments	(23)
Disposals	(1)
Write-offs	0
Closing balance	250		287
Reconciliation of ECL movement to impairment charge/(release) for the period
Gross write-offs	0
Stage 1 | Financial assets at amortised cost | Impairment allowance | Corporate loans | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	(21)
Stage 1 | Financial assets at amortised cost | Impairment allowance | Corporate loans | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	77
Stage 1 | Financial assets at amortised cost | Impairment allowance | Corporate loans | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	(2)
Stage 1 | Financial assets at amortised cost | Impairment allowance | Corporate loans | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	8
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 2 | Loans and advances
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	(98)
Lifetime expected credit losses | Stage 2 | Retail mortgages
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	4
Lifetime expected credit losses | Stage 2 | Retail credit cards
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	(26)
Lifetime expected credit losses | Stage 2 | Retail other
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	(5)
Lifetime expected credit losses | Stage 2 | Corporate loans
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	(71)
Lifetime expected credit losses | Stage 2 | ECL movement on loan commitments and other financial guarantees
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	(31)
Lifetime expected credit losses | Stage 2 | ECL movement on other financial assets
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	1
Lifetime expected credit losses | Stage 2 | Debt securities at amortised cost
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	(6)
Lifetime expected credit losses | Stage 2 | Gross exposure | Retail mortgages
Loans and advances at amortised cost
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(61)
Lifetime expected credit losses | Stage 2 | Gross exposure | Retail credit cards
Loans and advances at amortised cost
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(942)
Lifetime expected credit losses | Stage 2 | Gross exposure | Retail other
Loans and advances at amortised cost
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(46)
Lifetime expected credit losses | Stage 2 | Gross exposure | Corporate loans
Loans and advances at amortised cost
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	541
Lifetime expected credit losses | Stage 2 | Impairment allowance | Retail mortgages
Loans and advances at amortised cost
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	0
Lifetime expected credit losses | Stage 2 | Impairment allowance | Retail credit cards
Loans and advances at amortised cost
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	18
Lifetime expected credit losses | Stage 2 | Impairment allowance | Retail other
Loans and advances at amortised cost
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(2)
Lifetime expected credit losses | Stage 2 | Impairment allowance | Corporate loans
Loans and advances at amortised cost
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	43
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure | Retail mortgages
Loans and advances at amortised cost
Opening balance	19,469
Business activity in the period	224
Refinements to models used for calculation	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(554)
Final repayments	(1,033)
Disposals	(316)
Write-offs	0
Closing balance	20,848		19,469
Reconciliation of ECL movement to impairment charge/(release) for the period
Gross write-offs	0
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure | Retail mortgages | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	7,828
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure | Retail mortgages | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	(4,688)
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure | Retail mortgages | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	(158)
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure | Retail mortgages | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	76
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure | Retail credit cards
Loans and advances at amortised cost
Opening balance	5,578
Business activity in the period	72
Refinements to models used for calculation	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	306
Final repayments	(22)
Disposals	(176)
Write-offs	0
Closing balance	5,346		5,578
Reconciliation of ECL movement to impairment charge/(release) for the period
Gross write-offs	0
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure | Retail credit cards | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	1,898
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure | Retail credit cards | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	(1,595)
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure | Retail credit cards | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	(728)
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure | Retail credit cards | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	13
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure | Retail other
Loans and advances at amortised cost
Opening balance	1,343
Business activity in the period	117
Refinements to models used for calculation	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(107)
Final repayments	(116)
Disposals	0
Write-offs	0
Closing balance	1,312		1,343
Reconciliation of ECL movement to impairment charge/(release) for the period
Gross write-offs	0
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure | Retail other | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	516
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure | Retail other | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	(371)
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure | Retail other | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	(117)
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure | Retail other | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	47
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure | Corporate loans
Loans and advances at amortised cost
Opening balance	13,302
Business activity in the period	637
Refinements to models used for calculation	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(136)
Final repayments	(1,164)
Disposals	(5)
Write-offs	0
Closing balance	12,320		13,302
Reconciliation of ECL movement to impairment charge/(release) for the period
Gross write-offs	0
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure | Corporate loans | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	2,905
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure | Corporate loans | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	(2,769)
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure | Corporate loans | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	(586)
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Gross exposure | Corporate loans | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	136
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance | Retail mortgages
Loans and advances at amortised cost
Opening balance	105
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	29
Final repayments	(6)
Disposals	(29)
Write-offs	0
Closing balance	80		105
Reconciliation of ECL movement to impairment charge/(release) for the period
Gross write-offs	0
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance | Retail mortgages | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	4
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance | Retail mortgages | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	(20)
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance | Retail mortgages | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	(5)
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance | Retail mortgages | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	1
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance | Retail credit cards
Loans and advances at amortised cost
Opening balance	1,630
Business activity in the period	23
Refinements to models used for calculation	(25)
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	654
Final repayments	(9)
Disposals	(70)
Write-offs	0
Closing balance	1,534		1,630
Reconciliation of ECL movement to impairment charge/(release) for the period
Gross write-offs	0
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance | Retail credit cards | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	63
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance | Retail credit cards | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	(389)
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance | Retail credit cards | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	(348)
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance | Retail credit cards | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	5
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance | Retail other
Loans and advances at amortised cost
Opening balance	118
Business activity in the period	9
Refinements to models used for calculation	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	28
Final repayments	(4)
Disposals	0
Write-offs	0
Closing balance	113		118
Reconciliation of ECL movement to impairment charge/(release) for the period
Gross write-offs	0
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance | Retail other | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	7
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance | Retail other | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	(23)
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance | Retail other | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	(23)
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance | Retail other | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	1
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance | Corporate loans
Loans and advances at amortised cost
Opening balance	414
Business activity in the period	16
Refinements to models used for calculation	9
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	26
Final repayments	(50)
Disposals	(1)
Write-offs	0
Closing balance	342		414
Reconciliation of ECL movement to impairment charge/(release) for the period
Gross write-offs	0
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance | Corporate loans | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	21
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance | Corporate loans | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	(77)
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance | Corporate loans | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	(28)
Lifetime expected credit losses | Stage 2 | Financial assets at amortised cost | Impairment allowance | Corporate loans | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	12
Lifetime expected credit losses | Stage 3
Reconciliation of ECL movement to impairment charge/(release) for the period
Recoveries and reimbursements	50
Lifetime expected credit losses | Stage 3 | Loans and advances
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	1,109
Lifetime expected credit losses | Stage 3 | Retail mortgages
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	(7)
Lifetime expected credit losses | Stage 3 | Retail credit cards
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	883
Lifetime expected credit losses | Stage 3 | Retail other
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	63
Lifetime expected credit losses | Stage 3 | Corporate loans
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	170
Lifetime expected credit losses | Stage 3 | ECL movement on loan commitments and other financial guarantees
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	(12)
Lifetime expected credit losses | Stage 3 | ECL movement on other financial assets
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	0
Lifetime expected credit losses | Stage 3 | Debt securities at amortised cost
Reconciliation of ECL movement to impairment charge/(release) for the period
ECL movement	0
Lifetime expected credit losses | Stage 3 | Gross exposure | Retail mortgages
Loans and advances at amortised cost
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(1)
Lifetime expected credit losses | Stage 3 | Gross exposure | Retail credit cards
Loans and advances at amortised cost
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(30)
Lifetime expected credit losses | Stage 3 | Gross exposure | Retail other
Loans and advances at amortised cost
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(1)
Lifetime expected credit losses | Stage 3 | Gross exposure | Corporate loans
Loans and advances at amortised cost
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(99)
Lifetime expected credit losses | Stage 3 | Impairment allowance | Retail mortgages
Loans and advances at amortised cost
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	0
Lifetime expected credit losses | Stage 3 | Impairment allowance | Retail credit cards
Loans and advances at amortised cost
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	0
Lifetime expected credit losses | Stage 3 | Impairment allowance | Retail other
Loans and advances at amortised cost
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	0
Lifetime expected credit losses | Stage 3 | Impairment allowance | Corporate loans
Loans and advances at amortised cost
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(9)
Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Gross exposure | Retail mortgages
Loans and advances at amortised cost
Opening balance	2,424
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	(8)
Final repayments	(204)
Disposals	(129)
Write-offs	(10)
Closing balance	2,201		2,424
Reconciliation of ECL movement to impairment charge/(release) for the period
Gross write-offs	10
Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Gross exposure | Retail mortgages | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	0
Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Gross exposure | Retail mortgages | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	0
Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Gross exposure | Retail mortgages | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	234
Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Gross exposure | Retail mortgages | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	(106)
Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Gross exposure | Retail credit cards
Loans and advances at amortised cost
Opening balance	1,720
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	(2)
Disposals	(79)
Write-offs	(563)
Closing balance	2,038		1,720
Reconciliation of ECL movement to impairment charge/(release) for the period
Gross write-offs	563
Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Gross exposure | Retail credit cards | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	0
Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Gross exposure | Retail credit cards | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	0
Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Gross exposure | Retail credit cards | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	978
Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Gross exposure | Retail credit cards | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	(25)
Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Gross exposure | Retail other
Loans and advances at amortised cost
Opening balance	493
Business activity in the period	6
Refinements to models used for calculation	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(7)
Final repayments	(160)
Disposals	(24)
Write-offs	(53)
Closing balance	398		493
Reconciliation of ECL movement to impairment charge/(release) for the period
Gross write-offs	53
Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Gross exposure | Retail other | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	0
Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Gross exposure | Retail other | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	0
Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Gross exposure | Retail other | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	216
Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Gross exposure | Retail other | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	(73)
Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Gross exposure | Corporate loans
Loans and advances at amortised cost
Opening balance	2,554
Business activity in the period	136
Refinements to models used for calculation	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(344)
Final repayments	(224)
Disposals	0
Write-offs	(134)
Closing balance	2,517		2,554
Reconciliation of ECL movement to impairment charge/(release) for the period
Gross write-offs	134
Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Gross exposure | Corporate loans | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	0
Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Gross exposure | Corporate loans | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	0
Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Gross exposure | Corporate loans | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	830
Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Gross exposure | Corporate loans | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	(301)
Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Impairment allowance | Retail mortgages
Loans and advances at amortised cost
Opening balance	428
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	(12)
Disposals	(32)
Write-offs	(10)
Closing balance	379		428
Reconciliation of ECL movement to impairment charge/(release) for the period
Gross write-offs	10
Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Impairment allowance | Retail mortgages | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	0
Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Impairment allowance | Retail mortgages | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	0
Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Impairment allowance | Retail mortgages | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	6
Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Impairment allowance | Retail mortgages | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	(4)
Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Impairment allowance | Retail credit cards
Loans and advances at amortised cost
Opening balance	1,333
Business activity in the period	1
Refinements to models used for calculation	11
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	526
Final repayments	(2)
Disposals	(51)
Write-offs	(563)
Closing balance	1,602		1,333
Reconciliation of ECL movement to impairment charge/(release) for the period
Gross write-offs	563
Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Impairment allowance | Retail credit cards | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	0
Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Impairment allowance | Retail credit cards | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	0
Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Impairment allowance | Retail credit cards | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	358
Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Impairment allowance | Retail credit cards | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	(11)
Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Impairment allowance | Retail other
Loans and advances at amortised cost
Opening balance	176
Business activity in the period	4
Refinements to models used for calculation	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	55
Final repayments	(18)
Disposals	(18)
Write-offs	(53)
Closing balance	168		176
Reconciliation of ECL movement to impairment charge/(release) for the period
Gross write-offs	53
Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Impairment allowance | Retail other | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	0
Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Impairment allowance | Retail other | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	0
Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Impairment allowance | Retail other | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	24
Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Impairment allowance | Retail other | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	(2)
Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Impairment allowance | Corporate loans
Loans and advances at amortised cost
Opening balance	598
Business activity in the period	6
Refinements to models used for calculation	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	167
Final repayments	(13)
Disposals	0
Write-offs	(134)
Closing balance	634		£ 598
Reconciliation of ECL movement to impairment charge/(release) for the period
Gross write-offs	134
Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Impairment allowance | Corporate loans | Transfers from Stage 1 to Stage 2
Loans and advances at amortised cost
Transfers	0
Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Impairment allowance | Corporate loans | Transfers from Stage 2 to Stage 1
Loans and advances at amortised cost
Transfers	0
Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Impairment allowance | Corporate loans | Transfers to Stage 3
Loans and advances at amortised cost
Transfers	30
Lifetime expected credit losses | Stage 3 | Financial assets at amortised cost | Impairment allowance | Corporate loans | Transfers from Stage 3
Loans and advances at amortised cost
Transfers	£ (20)

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	£ 8,228
Net transfers between stages	0
Business activity in the period	6,279
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(4,351)
Limit management and final repayments	(185)
Ending balance	9,971
Gross exposure | Retail credit cards
Loan commitments and financial guarantees
Opening balance	147,740
Net transfers between stages	0
Business activity in the period	8,992
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	2,134
Limit management and final repayments	(6,111)
Ending balance	152,755
Gross exposure | Retail other
Loan commitments and financial guarantees
Opening balance	9,186
Net transfers between stages	0
Business activity in the period	581
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(36)
Limit management and final repayments	(661)
Ending balance	9,070
Gross exposure | Corporate loans
Loan commitments and financial guarantees
Opening balance	234,154
Net transfers between stages	0
Business activity in the period	50,778
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	5,321
Limit management and final repayments	(50,963)
Ending balance	239,290
Impairment allowance | Retail mortgages
Loan commitments and financial guarantees
Opening balance	0
Net transfers between stages	0
Business activity in the period	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
Impairment allowance | Retail credit cards
Loan commitments and financial guarantees
Opening balance	113
Net transfers between stages	0
Business activity in the period	16
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(6)
Limit management and final repayments	(18)
Ending balance	105
Impairment allowance | Retail other
Loan commitments and financial guarantees
Opening balance	8
Net transfers between stages	0
Business activity in the period	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	6
Impairment allowance | Corporate loans
Loan commitments and financial guarantees
Opening balance	383
Net transfers between stages	0
Business activity in the period	39
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(6)
Limit management and final repayments	(53)
Ending balance	363
Stage 1 | Gross exposure | Retail mortgages
Loan commitments and financial guarantees
Opening balance	7,776
Net transfers between stages	(25)
Business activity in the period	6,279
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(4,289)
Limit management and final repayments	(165)
Ending balance	9,576
Stage 1 | Gross exposure | Retail credit cards
Loan commitments and financial guarantees
Opening balance	144,791
Net transfers between stages	(1,060)
Business activity in the period	8,925
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	3,106
Limit management and final repayments	(5,851)
Ending balance	149,911
Stage 1 | Gross exposure | Retail other
Loan commitments and financial guarantees
Opening balance	8,607
Net transfers between stages	(8)
Business activity in the period	497
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	11
Limit management and final repayments	(638)
Ending balance	8,469
Stage 1 | Gross exposure | Corporate loans
Loan commitments and financial guarantees
Opening balance	212,889
Net transfers between stages	2,361
Business activity in the period	48,341
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	4,879
Limit management and final repayments	(46,322)
Ending balance	222,148
Stage 1 | Impairment allowance | Retail mortgages
Loan commitments and financial guarantees
Opening balance	0
Net transfers between stages	0
Business activity in the period	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 | Impairment allowance | Retail credit cards
Loan commitments and financial guarantees
Opening balance	59
Net transfers between stages	27
Business activity in the period	13
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(24)
Limit management and final repayments	(6)
Ending balance	69
Stage 1 | Impairment allowance | Retail other
Loan commitments and financial guarantees
Opening balance	6
Net transfers between stages	0
Business activity in the period	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	6
Stage 1 | Impairment allowance | Corporate loans
Loan commitments and financial guarantees
Opening balance	108
Net transfers between stages	36
Business activity in the period	19
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(40)
Limit management and final repayments	(12)
Ending balance	111
Lifetime expected credit losses | Stage 2 | Gross exposure | Retail mortgages
Loan commitments and financial guarantees
Opening balance	448
Net transfers between stages	25
Business activity in the period	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(61)
Limit management and final repayments	(20)
Ending balance	392
Lifetime expected credit losses | Stage 2 | Gross exposure | Retail credit cards
Loan commitments and financial guarantees
Opening balance	2,807
Net transfers between stages	1,026
Business activity in the period	66
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(942)
Limit management and final repayments	(252)
Ending balance	2,705
Lifetime expected credit losses | Stage 2 | Gross exposure | Retail other
Loan commitments and financial guarantees
Opening balance	535
Net transfers between stages	1
Business activity in the period	84
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(46)
Limit management and final repayments	(7)
Ending balance	567
Lifetime expected credit losses | Stage 2 | Gross exposure | Corporate loans
Loan commitments and financial guarantees
Opening balance	20,418
Net transfers between stages	(2,503)
Business activity in the period	2,365
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	541
Limit management and final repayments	(4,537)
Ending balance	16,284
Lifetime expected credit losses | Stage 2 | Impairment allowance | Retail mortgages
Loan commitments and financial guarantees
Opening balance	0
Net transfers between stages	0
Business activity in the period	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 | Impairment allowance | Retail credit cards
Loan commitments and financial guarantees
Opening balance	54
Net transfers between stages	(27)
Business activity in the period	3
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	18
Limit management and final repayments	(12)
Ending balance	36
Lifetime expected credit losses | Stage 2 | Impairment allowance | Retail other
Loan commitments and financial guarantees
Opening balance	2
Net transfers between stages	0
Business activity in the period	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 | Impairment allowance | Corporate loans
Loan commitments and financial guarantees
Opening balance	231
Net transfers between stages	(38)
Business activity in the period	20
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	43
Limit management and final repayments	(36)
Ending balance	220
Lifetime expected credit losses | Stage 3 | Gross exposure | Retail mortgages
Loan commitments and financial guarantees
Opening balance	4
Net transfers between stages	0
Business activity in the period	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(1)
Limit management and final repayments	0
Ending balance	3
Lifetime expected credit losses | Stage 3 | Gross exposure | Retail credit cards
Loan commitments and financial guarantees
Opening balance	142
Net transfers between stages	34
Business activity in the period	1
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(30)
Limit management and final repayments	(8)
Ending balance	139
Lifetime expected credit losses | Stage 3 | Gross exposure | Retail other
Loan commitments and financial guarantees
Opening balance	44
Net transfers between stages	7
Business activity in the period	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	34
Lifetime expected credit losses | Stage 3 | Gross exposure | Corporate loans
Loan commitments and financial guarantees
Opening balance	847
Net transfers between stages	142
Business activity in the period	72
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(99)
Limit management and final repayments	(104)
Ending balance	858
Lifetime expected credit losses | Stage 3 | Impairment allowance | Retail mortgages
Loan commitments and financial guarantees
Opening balance	0
Net transfers between stages	0
Business activity in the period	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 | Impairment allowance | Retail credit cards
Loan commitments and financial guarantees
Opening balance	0
Net transfers between stages	0
Business activity in the period	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 | Impairment allowance | Retail other
Loan commitments and financial guarantees
Opening balance	0
Net transfers between stages	0
Business activity in the period	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 | Impairment allowance | Corporate loans
Loan commitments and financial guarantees
Opening balance	44
Net transfers between stages	2
Business activity in the period	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(9)
Limit management and final repayments	(5)
Ending balance	£ 32

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	£ 6,198	£ 6,252
Proportion of Management adjustments to total impairment allowance	6.40%	6%
Impairment allowance pre management adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	£ 5,803	£ 5,875
Management adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	395	377
Economic uncertainty adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	151	198
Other adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	244	179
Loans and advances
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	£ 6,178	£ 6,225
Proportion of Management adjustments to total impairment allowance	6.50%	6.10%
Loans and advances | UK
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	£ 1,975	£ 2,132
Proportion of Management adjustments to total impairment allowance	18.60%	17.20%
Loans and advances | Rest of the world
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	£ 4,203	£ 4,093
Proportion of Management adjustments to total impairment allowance	0.90%	0.30%
Loans and advances | Impairment allowance pre management adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	£ 5,774	£ 5,848
Loans and advances | Impairment allowance pre management adjustments | UK
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	1,607	1,766
Loans and advances | Impairment allowance pre management adjustments | Rest of the world
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	4,167	4,082
Loans and advances | Modelled ECL
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	5,100	5,200
Loans and advances | Individually assessed impairments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	500	400
Loans and advances | Non-modelled ECL
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	200	300
Loans and advances | Management adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	404	377
Loans and advances | Management adjustments | UK
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	368	366
Loans and advances | Management adjustments | Rest of the world
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	36	11
Loans and advances | Economic uncertainty adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	151	198
Loans and advances | Economic uncertainty adjustments | UK
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	151	182
Loans and advances | Economic uncertainty adjustments | Rest of the world
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	0	16
Loans and advances | Economic uncertainty adjustments | Stage 1
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	54	75
Loans and advances | Economic uncertainty adjustments | Stage 1 | UK
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	54	71
Loans and advances | Economic uncertainty adjustments | Stage 1 | Rest of the world
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	0	4
Loans and advances | Economic uncertainty adjustments | Lifetime expected credit losses | Stage 2
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	76	99
Loans and advances | Economic uncertainty adjustments | Lifetime expected credit losses | Stage 2 | UK
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	76	87
Loans and advances | Economic uncertainty adjustments | Lifetime expected credit losses | Stage 2 | Rest of the world
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	0	12
Loans and advances | Economic uncertainty adjustments | Lifetime expected credit losses | Stage 3
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	21	24
Loans and advances | Economic uncertainty adjustments | Lifetime expected credit losses | Stage 3 | UK
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	21	24
Loans and advances | Economic uncertainty adjustments | Lifetime expected credit losses | Stage 3 | Rest of the world
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	0	0
Loans and advances | Other adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	253	179
Loans and advances | Other adjustments | UK
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	217	184
Loans and advances | Other adjustments | Rest of the world
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	36	(5)
Retail mortgages | UK
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	£ 220	£ 232
Proportion of Management adjustments to total impairment allowance	77.30%	76.70%
Retail mortgages | Rest of the world
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	£ 280	£ 351
Proportion of Management adjustments to total impairment allowance	(0.70%)	(0.90%)
Retail mortgages | Impairment allowance pre management adjustments | UK
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	£ 50	£ 54
Retail mortgages | Impairment allowance pre management adjustments | Rest of the world
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	282	354
Retail mortgages | Management adjustments | UK
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	170	178
Retail mortgages | Management adjustments | Rest of the world
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	(2)	(3)
Retail mortgages | Economic uncertainty adjustments | UK
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	42	57
Retail mortgages | Economic uncertainty adjustments | Rest of the world
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	0	0
Retail mortgages | Economic uncertainty adjustments | Stage 1 | UK
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	8	12
Retail mortgages | Economic uncertainty adjustments | Stage 1 | Rest of the world
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	0	0
Retail mortgages | Economic uncertainty adjustments | Lifetime expected credit losses | Stage 2 | UK
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	25	32
Retail mortgages | Economic uncertainty adjustments | Lifetime expected credit losses | Stage 2 | Rest of the world
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	0	0
Retail mortgages | Economic uncertainty adjustments | Lifetime expected credit losses | Stage 3 | UK
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	9	13
Retail mortgages | Economic uncertainty adjustments | Lifetime expected credit losses | Stage 3 | Rest of the world
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	0	0
Retail mortgages | Other adjustments | UK
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	128	121
Retail mortgages | Other adjustments | Rest of the world
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	(2)	(3)
Retail credit cards | UK
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	£ 684	£ 736
Proportion of Management adjustments to total impairment allowance	6%	4.90%
Retail credit cards | Rest of the world
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	£ 3,065	£ 2,863
Proportion of Management adjustments to total impairment allowance	0%	0.30%
Retail credit cards | Impairment allowance pre management adjustments | UK
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	£ 643	£ 700
Retail credit cards | Impairment allowance pre management adjustments | Rest of the world
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	3,065	2,855
Retail credit cards | Management adjustments | UK
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	41	36
Retail credit cards | Management adjustments | Rest of the world
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	0	8
Retail credit cards | Economic uncertainty adjustments | UK
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	45	45
Retail credit cards | Economic uncertainty adjustments | Rest of the world
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	0	0
Retail credit cards | Economic uncertainty adjustments | Stage 1 | UK
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	8	8
Retail credit cards | Economic uncertainty adjustments | Stage 1 | Rest of the world
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	0	0
Retail credit cards | Economic uncertainty adjustments | Lifetime expected credit losses | Stage 2 | UK
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	37	37
Retail credit cards | Economic uncertainty adjustments | Lifetime expected credit losses | Stage 2 | Rest of the world
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	0	0
Retail credit cards | Economic uncertainty adjustments | Lifetime expected credit losses | Stage 3 | UK
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	0	0
Retail credit cards | Economic uncertainty adjustments | Lifetime expected credit losses | Stage 3 | Rest of the world
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	0	0
Retail credit cards | Other adjustments | UK
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	(4)	(9)
Retail credit cards | Other adjustments | Rest of the world
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	0	8
Retail other | UK
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	£ 310	£ 322
Proportion of Management adjustments to total impairment allowance	25.50%	22%
Retail other | Rest of the world
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	£ 30	£ 39
Proportion of Management adjustments to total impairment allowance	6.70%	(15.40%)
Retail other | Impairment allowance pre management adjustments | UK
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	£ 231	£ 251
Retail other | Impairment allowance pre management adjustments | Rest of the world
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	28	45
Retail other | Management adjustments | UK
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	79	71
Retail other | Management adjustments | Rest of the world
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	2	(6)
Retail other | Economic uncertainty adjustments | UK
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	9	9
Retail other | Economic uncertainty adjustments | Rest of the world
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	0	0
Retail other | Economic uncertainty adjustments | Stage 1 | UK
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	3	3
Retail other | Economic uncertainty adjustments | Stage 1 | Rest of the world
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	0	0
Retail other | Economic uncertainty adjustments | Lifetime expected credit losses | Stage 2 | UK
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	6	6
Retail other | Economic uncertainty adjustments | Lifetime expected credit losses | Stage 2 | Rest of the world
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	0	0
Retail other | Economic uncertainty adjustments | Lifetime expected credit losses | Stage 3 | UK
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	0	0
Retail other | Economic uncertainty adjustments | Lifetime expected credit losses | Stage 3 | Rest of the world
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	0	0
Retail other | Other adjustments | UK
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	70	62
Retail other | Other adjustments | Rest of the world
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	2	(6)
Corporate loans | UK
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	£ 761	£ 842
Proportion of Management adjustments to total impairment allowance	10.20%	9.60%
Corporate loans | Rest of the world
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	£ 828	£ 840
Proportion of Management adjustments to total impairment allowance	4.30%	1.40%
Corporate loans | Impairment allowance pre management adjustments | UK
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	£ 683	£ 761
Corporate loans | Impairment allowance pre management adjustments | Rest of the world
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	792	828
Corporate loans | Management adjustments | UK
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	78	81
Corporate loans | Management adjustments | Rest of the world
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	36	12
Corporate loans | Economic uncertainty adjustments | UK
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	55	71
Corporate loans | Economic uncertainty adjustments | Rest of the world
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	0	16
Corporate loans | Economic uncertainty adjustments | Stage 1 | UK
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	35	48
Corporate loans | Economic uncertainty adjustments | Stage 1 | Rest of the world
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	0	4
Corporate loans | Economic uncertainty adjustments | Lifetime expected credit losses | Stage 2 | UK
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	8	12
Corporate loans | Economic uncertainty adjustments | Lifetime expected credit losses | Stage 2 | Rest of the world
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	0	12
Corporate loans | Economic uncertainty adjustments | Lifetime expected credit losses | Stage 3 | UK
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	12	11
Corporate loans | Economic uncertainty adjustments | Lifetime expected credit losses | Stage 3 | Rest of the world
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	0	0
Corporate loans | Other adjustments | UK
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	23	10
Corporate loans | Other adjustments | Rest of the world
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	36	(4)
Debt securities and other
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	£ 20	£ 27
Proportion of Management adjustments to total impairment allowance	(45.00%)	0%
Debt securities and other | Impairment allowance pre management adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	£ 29	£ 27
Debt securities and other | Management adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	(9)	0
Debt securities and other | Economic uncertainty adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	0	0
Debt securities and other | Other adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	(9)	£ 0
Cash collateral and settlements | Management adjustments | Other financial assets subject to impairment | Barclays Investment Bank
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 | Other financial assets subject to impairment | Barclays Investment Bank
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	£ 6,198	£ 6,252
Number of economic scenarios, percentage	100%
Expected credit loss rate	100%
Impairment allowance
Disclosure of financial assets [line items]
Financial assets	£ (6,198)	(6,252)
Credit risk
Disclosure of financial assets [line items]
Number of economic scenarios | economic_scenario	5
Stress horizon period, ECL	5 years
Baseline
Disclosure of financial assets [line items]
Weighted expected credit loss, uplift percentage	0.90%
Economic uncertainty adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	£ 151	198
Other adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	244	179
Total weighted model ECL | Impairment allowance
Disclosure of financial assets [line items]
Financial assets	(5,093)	(5,171)
Loans and advances
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	6,178	6,225
Loans and advances | UK
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	1,975	2,132
Loans and advances | Rest of the world
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	4,203	4,093
Loans and advances | Economic uncertainty adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	151	198
Loans and advances | Economic uncertainty adjustments | UK
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	151	182
Loans and advances | Economic uncertainty adjustments | Rest of the world
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	0	16
Loans and advances | Economic uncertainty adjustments | Model uncertainty risk
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	22	32
Loans and advances | Economic uncertainty adjustments | Customers
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	129	166
Loans and advances | Other adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	253	179
Loans and advances | Other adjustments | UK
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	217	184
Loans and advances | Other adjustments | Rest of the world
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	36	(5)
Loans and advances | Total weighted model ECL
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	5,100	5,200
Loans and advances | Financial assets at amortised cost
Disclosure of financial assets [line items]
Financial assets	337,809	342,747
Loans and advances | Financial assets at amortised cost | UK
Disclosure of financial assets [line items]
Financial assets	242,449	248,316
Loans and advances | Financial assets at amortised cost | Rest of the world
Disclosure of financial assets [line items]
Financial assets	95,360	94,431
Loans and advances | Financial assets at amortised cost | Impairment allowance
Disclosure of financial assets [line items]
Financial assets	5,704	5,721
Loans and advances | Financial assets at amortised cost | Impairment allowance | UK
Disclosure of financial assets [line items]
Financial assets	1,858	2,010
Loans and advances | Financial assets at amortised cost | Impairment allowance | Rest of the world
Disclosure of financial assets [line items]
Financial assets	3,846	3,711
Loans and advances | Financial assets at amortised cost | Total weighted model ECL | Credit risk | Impairment allowance
Disclosure of financial assets [line items]
Financial assets	(5,093)	(5,171)
Loans and advances | Financial assets at amortised cost | Total weighted model ECL | Baseline | Impairment allowance
Disclosure of financial assets [line items]
Financial assets	(5,047)	(5,097)
Loans and advances | Financial assets at amortised cost | Total weighted model ECL | Downside 2 | Impairment allowance
Disclosure of financial assets [line items]
Financial assets	(5,991)	(6,102)
Retail mortgages | UK
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	220	232
Retail mortgages | Rest of the world
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	£ 280	351
Retail mortgages | Baseline
Disclosure of financial assets [line items]
Weighted expected credit loss, uplift percentage	2.80%
Retail mortgages | Economic uncertainty adjustments | UK
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	£ 42	57
Retail mortgages | Economic uncertainty adjustments | Rest of the world
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	0	0
Retail mortgages | Economic uncertainty adjustments | Model uncertainty risk
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	22	32
Retail mortgages | Economic uncertainty adjustments | Customers | UK
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	20	25
Retail mortgages | Other adjustments | UK
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	128	121
Retail mortgages | Other adjustments | Rest of the world
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	(2)	(3)
Retail mortgages | Financial assets at amortised cost
Disclosure of financial assets [line items]
Financial assets	166,142	171,512
Retail mortgages | Financial assets at amortised cost | UK
Disclosure of financial assets [line items]
Financial assets	164,305	166,704
Retail mortgages | Financial assets at amortised cost | Rest of the world
Disclosure of financial assets [line items]
Financial assets	1,837	4,808
Retail mortgages | Financial assets at amortised cost | Impairment allowance
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	500	583
Financial assets	500	583
Retail mortgages | Financial assets at amortised cost | Impairment allowance | UK
Disclosure of financial assets [line items]
Financial assets	220	232
Retail mortgages | Financial assets at amortised cost | Impairment allowance | Rest of the world
Disclosure of financial assets [line items]
Financial assets	280	351
Retail mortgages | Financial assets at amortised cost | Total weighted model ECL | Credit risk | Impairment allowance
Disclosure of financial assets [line items]
Financial assets	(296)	(383)
Retail mortgages | Financial assets at amortised cost | Total weighted model ECL | Baseline | Impairment allowance
Disclosure of financial assets [line items]
Financial assets	(288)	(366)
Retail mortgages | Financial assets at amortised cost | Total weighted model ECL | Downside 2 | Impairment allowance
Disclosure of financial assets [line items]
Financial assets	(385)	(538)
Retail credit cards | UK
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	684	736
Retail credit cards | Rest of the world
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	3,065	2,863
Retail credit cards | Economic uncertainty adjustments | UK
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	45	45
Retail credit cards | Economic uncertainty adjustments | Rest of the world
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	0	0
Retail credit cards | Economic uncertainty adjustments | Customers | UK
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	45	45
Retail credit cards | Other adjustments | UK
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	(4)	(9)
Retail credit cards | Other adjustments | Rest of the world
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	0	8
Retail credit cards | Financial assets at amortised cost
Disclosure of financial assets [line items]
Financial assets	34,179	34,221
Retail credit cards | Financial assets at amortised cost | UK
Disclosure of financial assets [line items]
Financial assets	10,225	9,710
Retail credit cards | Financial assets at amortised cost | Rest of the world
Disclosure of financial assets [line items]
Financial assets	23,954	24,511
Retail credit cards | Financial assets at amortised cost | Impairment allowance
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	3,644	3,486
Financial assets	3,644	3,486
Retail credit cards | Financial assets at amortised cost | Impairment allowance | UK
Disclosure of financial assets [line items]
Financial assets	663	710
Retail credit cards | Financial assets at amortised cost | Impairment allowance | Rest of the world
Disclosure of financial assets [line items]
Financial assets	2,981	2,776
Retail credit cards | Financial assets at amortised cost | Total weighted model ECL | Credit risk | Impairment allowance
Disclosure of financial assets [line items]
Financial assets	(3,707)	(3,561)
Retail credit cards | Financial assets at amortised cost | Total weighted model ECL | Baseline | Impairment allowance
Disclosure of financial assets [line items]
Financial assets	(3,702)	(3,542)
Retail credit cards | Financial assets at amortised cost | Total weighted model ECL | Downside 2 | Impairment allowance
Disclosure of financial assets [line items]
Financial assets	(4,024)	(3,893)
Retail other | UK
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	310	322
Retail other | Rest of the world
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	30	39
Retail other | Economic uncertainty adjustments | UK
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	9	9
Retail other | Economic uncertainty adjustments | Rest of the world
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	0	0
Retail other | Economic uncertainty adjustments | Customers | UK
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	9	9
Retail other | Other adjustments | UK
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	70	62
Retail other | Other adjustments | Rest of the world
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	2	(6)
Retail other | Financial assets at amortised cost
Disclosure of financial assets [line items]
Financial assets	9,767	9,952
Retail other | Financial assets at amortised cost | UK
Disclosure of financial assets [line items]
Financial assets	7,885	8,031
Retail other | Financial assets at amortised cost | Rest of the world
Disclosure of financial assets [line items]
Financial assets	1,882	1,921
Retail other | Financial assets at amortised cost | Impairment allowance
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	334	353
Financial assets	334	353
Retail other | Financial assets at amortised cost | Impairment allowance | UK
Disclosure of financial assets [line items]
Financial assets	305	317
Retail other | Financial assets at amortised cost | Impairment allowance | Rest of the world
Disclosure of financial assets [line items]
Financial assets	29	36
Retail other | Financial assets at amortised cost | Total weighted model ECL | Credit risk | Impairment allowance
Disclosure of financial assets [line items]
Financial assets	(208)	(212)
Retail other | Financial assets at amortised cost | Total weighted model ECL | Baseline | Impairment allowance
Disclosure of financial assets [line items]
Financial assets	(206)	(211)
Retail other | Financial assets at amortised cost | Total weighted model ECL | Downside 2 | Impairment allowance
Disclosure of financial assets [line items]
Financial assets	(235)	(233)
Corporate loans | UK
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	761	842
Corporate loans | Rest of the world
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	£ 828	840
Corporate loans | Baseline
Disclosure of financial assets [line items]
Weighted expected credit loss, uplift percentage	3.60%
Corporate loans | Economic uncertainty adjustments | UK
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	£ 55	71
Corporate loans | Economic uncertainty adjustments | Rest of the world
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	0	16
Corporate loans | Economic uncertainty adjustments | Customers | UK
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	55	71
Corporate loans | Economic uncertainty adjustments | Customers | Rest of the world
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	0	16
Corporate loans | Other adjustments | UK
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	23	10
Corporate loans | Other adjustments | Rest of the world
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	36	(4)
Corporate loans | Financial assets at amortised cost
Disclosure of financial assets [line items]
Financial assets	127,721	127,062
Corporate loans | Financial assets at amortised cost | UK
Disclosure of financial assets [line items]
Financial assets	60,034	63,871
Corporate loans | Financial assets at amortised cost | Rest of the world
Disclosure of financial assets [line items]
Financial assets	67,687	63,191
Corporate loans | Financial assets at amortised cost | Impairment allowance
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	1,226	1,299
Financial assets	1,226	1,299
Corporate loans | Financial assets at amortised cost | Impairment allowance | UK
Disclosure of financial assets [line items]
Financial assets	670	751
Corporate loans | Financial assets at amortised cost | Impairment allowance | Rest of the world
Disclosure of financial assets [line items]
Financial assets	556	548
Corporate loans | Financial assets at amortised cost | Total weighted model ECL | Credit risk | Impairment allowance
Disclosure of financial assets [line items]
Financial assets	(882)	(1,015)
Corporate loans | Financial assets at amortised cost | Total weighted model ECL | Baseline | Impairment allowance
Disclosure of financial assets [line items]
Financial assets	(851)	(978)
Corporate loans | Financial assets at amortised cost | Total weighted model ECL | Downside 2 | Impairment allowance
Disclosure of financial assets [line items]
Financial assets	(1,347)	(1,438)
Debt securities at amortised cost | Other adjustments
Disclosure of financial assets [line items]
Allowance account for credit losses of financial assets	(9)
Debt securities at amortised cost | Financial assets at amortised cost
Disclosure of financial assets [line items]
Financial assets	61,700	56,749
Debt securities at amortised cost | Financial assets at amortised cost | Impairment allowance
Disclosure of financial assets [line items]
Financial assets	£ 20	£ 27

Credit Risk - Measurement uncer

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

Credit Risk - Measurement unc_2

Credit Risk - Measurement uncertainty - 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 - Measurement unc_3

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

Credit Risk - Measurement unc_4

Credit Risk - Measurement uncertainty - ECL under 100% weighted scenarios for modelled portfolios (Details) £ in Millions	Jun. 30, 2024 GBP (£)	Dec. 31, 2023 GBP (£)
Impairment allowance
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ (6,198)	£ (6,252)
Impairment allowance | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(5,093)	(5,171)
Impairment allowance | ECL from individually assessed impairments
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(457)	(401)
Impairment allowance | ECL from non-modelled exposures and others
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(224)	(276)
Impairment allowance | ECL from debt securities at amortised cost
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(20)	(27)
Impairment allowance | ECL from post model management adjustments
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(404)	(377)
Impairment allowance | ECL from economic uncertainty adjustments
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(151)	(198)
Loans and advances | Financial assets at amortised cost
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 337,809	£ 342,747
Coverage ratio	0.017	0.016
Loans and advances | Financial assets at amortised cost | Stage 1
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 295,681	£ 300,666
Coverage ratio	0.003	0.003
Loans and advances | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 37,757	£ 37,425
Coverage ratio	0.052	0.057
Loans and advances | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 4,371	£ 4,656
Coverage ratio	0.389	0.353
Loans and advances | Gross exposure | Financial assets at amortised cost
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 343,513	£ 348,468
Loans and advances | Gross exposure | Financial assets at amortised cost | Stage 1
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	296,533	301,585
Loans and advances | Gross exposure | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	39,826	39,692
Loans and advances | Gross exposure | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	7,154	7,191
Loans and advances | Impairment allowance | Financial assets at amortised cost
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	5,704	5,721
Loans and advances | Impairment allowance | Financial assets at amortised cost | Stage 1
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	852	919
Loans and advances | Impairment allowance | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	2,069	2,267
Loans and advances | Impairment allowance | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	2,783	2,535
Retail mortgages | Financial assets at amortised cost
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 166,142	£ 171,512
Coverage ratio	0.003	0.003
Retail mortgages | Financial assets at amortised cost | Stage 1
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 143,552	£ 150,152
Coverage ratio	0	0
Retail mortgages | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 20,768	£ 19,364
Coverage ratio	0.004	0.005
Retail mortgages | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 1,822	£ 1,996
Coverage ratio	0.172	0.177
Retail mortgages | Gross exposure | Financial assets at amortised cost
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 166,642	£ 172,095
Retail mortgages | Gross exposure | Financial assets at amortised cost | Stage 1
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	143,593	150,202
Retail mortgages | Gross exposure | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	20,848	19,469
Retail mortgages | Gross exposure | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	2,201	2,424
Retail mortgages | Impairment allowance | Financial assets at amortised cost
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	500	583
Retail mortgages | Impairment allowance | Financial assets at amortised cost | Stage 1
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	41	50
Retail mortgages | Impairment allowance | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	80	105
Retail mortgages | Impairment allowance | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	379	428
Retail credit cards | Financial assets at amortised cost
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 34,179	£ 34,221
Coverage ratio	0.096	0.092
Retail credit cards | Financial assets at amortised cost | Stage 1
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 29,931	£ 29,886
Coverage ratio	0.017	0.017
Retail credit cards | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 3,812	£ 3,948
Coverage ratio	0.287	0.292
Retail credit cards | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 436	£ 387
Coverage ratio	0.786	0.775
Retail credit cards | Gross exposure | Financial assets at amortised cost
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 37,823	£ 37,707
Retail credit cards | Gross exposure | Financial assets at amortised cost | Stage 1
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	30,439	30,409
Retail credit cards | Gross exposure | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	5,346	5,578
Retail credit cards | Gross exposure | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	2,038	1,720
Retail credit cards | Impairment allowance | Financial assets at amortised cost
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	3,644	3,486
Retail credit cards | Impairment allowance | Financial assets at amortised cost | Stage 1
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	508	523
Retail credit cards | Impairment allowance | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	1,534	1,630
Retail credit cards | Impairment allowance | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	1,602	1,333
Retail other | Financial assets at amortised cost
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 9,767	£ 9,952
Coverage ratio	0.033	0.034
Retail other | Financial assets at amortised cost | Stage 1
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 8,338	£ 8,410
Coverage ratio	0.006	0.007
Retail other | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 1,199	£ 1,225
Coverage ratio	0.086	0.088
Retail other | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 230	£ 317
Coverage ratio	0.422	0.357
Retail other | Gross exposure | Financial assets at amortised cost
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 10,101	£ 10,305
Retail other | Gross exposure | Financial assets at amortised cost | Stage 1
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	8,391	8,469
Retail other | Gross exposure | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	1,312	1,343
Retail other | Gross exposure | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	398	493
Retail other | Impairment allowance | Financial assets at amortised cost
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	334	353
Retail other | Impairment allowance | Financial assets at amortised cost | Stage 1
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	53	59
Retail other | Impairment allowance | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	113	118
Retail other | Impairment allowance | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	168	176
Corporate loans | Financial assets at amortised cost
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 127,721	£ 127,062
Coverage ratio	0.010	0.010
Corporate loans | Financial assets at amortised cost | Stage 1
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 113,860	£ 112,218
Coverage ratio	0.002	0.003
Corporate loans | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 11,978	£ 12,888
Coverage ratio	0.028	0.031
Corporate loans | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 1,883	£ 1,956
Coverage ratio	0.252	0.234
Corporate loans | Gross exposure | Financial assets at amortised cost
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 128,947	£ 128,361
Corporate loans | Gross exposure | Financial assets at amortised cost | Stage 1
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	114,110	112,505
Corporate loans | Gross exposure | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	12,320	13,302
Corporate loans | Gross exposure | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	2,517	2,554
Corporate loans | Impairment allowance | Financial assets at amortised cost
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	1,226	1,299
Corporate loans | Impairment allowance | Financial assets at amortised cost | Stage 1
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	250	287
Corporate loans | Impairment allowance | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	342	414
Corporate loans | Impairment allowance | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	634	598
Credit risk | Loans and advances | Impairment allowance | Financial assets at amortised cost | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ (5,093)	£ (5,171)
Credit risk | Retail mortgages | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0	0
Credit risk | Retail mortgages | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0	0.2
Credit risk | Retail mortgages | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	18.4	19.9
Credit risk | Retail mortgages | Gross exposure | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 137,577	£ 145,226
Credit risk | Retail mortgages | Gross exposure | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	21,804	20,615
Credit risk | Retail mortgages | Gross exposure | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	1,546	1,672
Credit risk | Retail mortgages | Impairment allowance | Financial assets at amortised cost | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(296)	(383)
Credit risk | Retail mortgages | Impairment allowance | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(3)	(9)
Credit risk | Retail mortgages | Impairment allowance | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(8)	(41)
Credit risk | Retail mortgages | Impairment allowance | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ (285)	£ (333)
Credit risk | Retail credit cards | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0.9	0.8
Credit risk | Retail credit cards | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	23.8	23.8
Credit risk | Retail credit cards | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	74.5	72
Credit risk | Retail credit cards | Gross exposure | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 65,142	£ 66,512
Credit risk | Retail credit cards | Gross exposure | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	6,493	7,076
Credit risk | Retail credit cards | Gross exposure | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	2,151	1,827
Credit risk | Retail credit cards | Impairment allowance | Financial assets at amortised cost | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(3,707)	(3,561)
Credit risk | Retail credit cards | Impairment allowance | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(561)	(562)
Credit risk | Retail credit cards | Impairment allowance | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(1,544)	(1,684)
Credit risk | Retail credit cards | Impairment allowance | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ (1,602)	£ (1,315)
Credit risk | Retail other | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0.4	0.4
Credit risk | Retail other | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	6.3	6.2
Credit risk | Retail other | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	58	57.9
Credit risk | Retail other | Gross exposure | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 8,050	£ 8,749
Credit risk | Retail other | Gross exposure | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	1,307	1,382
Credit risk | Retail other | Gross exposure | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	162	164
Credit risk | Retail other | Impairment allowance | Financial assets at amortised cost | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(208)	(212)
Credit risk | Retail other | Impairment allowance | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(32)	(32)
Credit risk | Retail other | Impairment allowance | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(82)	(85)
Credit risk | Retail other | Impairment allowance | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ (94)	£ (95)
Credit risk | Corporate loans | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0.1	0.2
Credit risk | Corporate loans | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	2.4	2.7
Credit risk | Corporate loans | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	1.9	2.2
Credit risk | Corporate loans | Gross exposure | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 204,588	£ 175,282
Credit risk | Corporate loans | Gross exposure | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	22,261	24,374
Credit risk | Corporate loans | Gross exposure | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	3,561	3,436
Credit risk | Corporate loans | Impairment allowance | Financial assets at amortised cost | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(882)	(1,015)
Credit risk | Corporate loans | Impairment allowance | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(278)	(275)
Credit risk | Corporate loans | Impairment allowance | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(537)	(663)
Credit risk | Corporate loans | Impairment allowance | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(67)	(77)
Upside 2 | Loans and advances | Impairment allowance | Financial assets at amortised cost | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ (4,744)	£ (4,717)
Upside 2 | Retail mortgages | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0	0
Upside 2 | Retail mortgages | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0	0.1
Upside 2 | Retail mortgages | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	17.3	18.4
Upside 2 | Retail mortgages | Gross exposure | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 140,036	£ 147,415
Upside 2 | Retail mortgages | Gross exposure | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	18,809	17,769
Upside 2 | Retail mortgages | Gross exposure | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	1,546	1,672
Upside 2 | Retail mortgages | Impairment allowance | Financial assets at amortised cost | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(269)	(335)
Upside 2 | Retail mortgages | Impairment allowance | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	0	(4)
Upside 2 | Retail mortgages | Impairment allowance | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(1)	(23)
Upside 2 | Retail mortgages | Impairment allowance | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ (268)	£ (308)
Upside 2 | Retail credit cards | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0.8	0.8
Upside 2 | Retail credit cards | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	22.8	22.5
Upside 2 | Retail credit cards | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	72.8	70
Upside 2 | Retail credit cards | Gross exposure | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 65,077	£ 66,459
Upside 2 | Retail credit cards | Gross exposure | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	6,351	6,897
Upside 2 | Retail credit cards | Gross exposure | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	2,151	1,827
Upside 2 | Retail credit cards | Impairment allowance | Financial assets at amortised cost | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(3,550)	(3,362)
Upside 2 | Retail credit cards | Impairment allowance | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(534)	(529)
Upside 2 | Retail credit cards | Impairment allowance | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(1,449)	(1,554)
Upside 2 | Retail credit cards | Impairment allowance | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ (1,567)	£ (1,279)
Upside 2 | Retail other | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0.4	0.3
Upside 2 | Retail other | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	6	5.9
Upside 2 | Retail other | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	56.8	57.3
Upside 2 | Retail other | Gross exposure | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 8,183	£ 8,915
Upside 2 | Retail other | Gross exposure | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	1,174	1,216
Upside 2 | Retail other | Gross exposure | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	162	164
Upside 2 | Retail other | Impairment allowance | Financial assets at amortised cost | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(193)	(197)
Upside 2 | Retail other | Impairment allowance | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(31)	(31)
Upside 2 | Retail other | Impairment allowance | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(70)	(72)
Upside 2 | Retail other | Impairment allowance | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ (92)	£ (94)
Upside 2 | Corporate loans | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0.1	0.1
Upside 2 | Corporate loans | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	2.2	2.6
Upside 2 | Corporate loans | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	1.7	2.1
Upside 2 | Corporate loans | Gross exposure | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 207,006	£ 179,567
Upside 2 | Corporate loans | Gross exposure | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	19,695	19,919
Upside 2 | Corporate loans | Gross exposure | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	3,561	3,436
Upside 2 | Corporate loans | Impairment allowance | Financial assets at amortised cost | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(732)	(823)
Upside 2 | Corporate loans | Impairment allowance | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(244)	(243)
Upside 2 | Corporate loans | Impairment allowance | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(426)	(509)
Upside 2 | Corporate loans | Impairment allowance | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(62)	(71)
Upside 1 | Loans and advances | Impairment allowance | Financial assets at amortised cost | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ (4,889)	£ (4,897)
Upside 1 | Retail mortgages | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0	0
Upside 1 | Retail mortgages | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0	0.1
Upside 1 | Retail mortgages | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	17.7	18.9
Upside 1 | Retail mortgages | Gross exposure | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 139,029	£ 146,653
Upside 1 | Retail mortgages | Gross exposure | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	19,974	18,702
Upside 1 | Retail mortgages | Gross exposure | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	1,546	1,672
Upside 1 | Retail mortgages | Impairment allowance | Financial assets at amortised cost | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(277)	(348)
Upside 1 | Retail mortgages | Impairment allowance | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(1)	(5)
Upside 1 | Retail mortgages | Impairment allowance | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(3)	(27)
Upside 1 | Retail mortgages | Impairment allowance | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ (273)	£ (316)
Upside 1 | Retail credit cards | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0.8	0.8
Upside 1 | Retail credit cards | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	23.2	23.1
Upside 1 | Retail credit cards | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	73.7	70.9
Upside 1 | Retail credit cards | Gross exposure | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 65,108	£ 66,482
Upside 1 | Retail credit cards | Gross exposure | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	6,420	6,976
Upside 1 | Retail credit cards | Gross exposure | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	2,151	1,827
Upside 1 | Retail credit cards | Impairment allowance | Financial assets at amortised cost | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(3,625)	(3,450)
Upside 1 | Retail credit cards | Impairment allowance | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(548)	(545)
Upside 1 | Retail credit cards | Impairment allowance | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(1,492)	(1,609)
Upside 1 | Retail credit cards | Impairment allowance | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ (1,585)	£ (1,296)
Upside 1 | Retail other | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0.4	0.4
Upside 1 | Retail other | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	6.1	6
Upside 1 | Retail other | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	57.4	57.3
Upside 1 | Retail other | Gross exposure | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 8,122	£ 8,841
Upside 1 | Retail other | Gross exposure | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	1,235	1,290
Upside 1 | Retail other | Gross exposure | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	162	164
Upside 1 | Retail other | Impairment allowance | Financial assets at amortised cost | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(200)	(204)
Upside 1 | Retail other | Impairment allowance | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(32)	(32)
Upside 1 | Retail other | Impairment allowance | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(75)	(78)
Upside 1 | Retail other | Impairment allowance | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ (93)	£ (94)
Upside 1 | Corporate loans | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0.1	0.1
Upside 1 | Corporate loans | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	2.2	2.6
Upside 1 | Corporate loans | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	1.8	2.1
Upside 1 | Corporate loans | Gross exposure | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 205,881	£ 177,923
Upside 1 | Corporate loans | Gross exposure | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	20,872	21,621
Upside 1 | Corporate loans | Gross exposure | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	3,561	3,436
Upside 1 | Corporate loans | Impairment allowance | Financial assets at amortised cost | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(787)	(895)
Upside 1 | Corporate loans | Impairment allowance | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(257)	(257)
Upside 1 | Corporate loans | Impairment allowance | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(467)	(565)
Upside 1 | Corporate loans | Impairment allowance | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(63)	(73)
Baseline | Loans and advances | Impairment allowance | Financial assets at amortised cost | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ (5,047)	£ (5,097)
Baseline | Retail mortgages | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0	0
Baseline | Retail mortgages | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0	0.2
Baseline | Retail mortgages | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	18.2	19.4
Baseline | Retail mortgages | Gross exposure | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 137,590	£ 145,405
Baseline | Retail mortgages | Gross exposure | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	21,598	20,149
Baseline | Retail mortgages | Gross exposure | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	1,546	1,672
Baseline | Retail mortgages | Impairment allowance | Financial assets at amortised cost | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(288)	(366)
Baseline | Retail mortgages | Impairment allowance | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(2)	(7)
Baseline | Retail mortgages | Impairment allowance | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(5)	(34)
Baseline | Retail mortgages | Impairment allowance | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ (281)	£ (325)
Baseline | Retail credit cards | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0.9	0.8
Baseline | Retail credit cards | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	23.7	23.6
Baseline | Retail credit cards | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	74.5	71.9
Baseline | Retail credit cards | Gross exposure | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 65,137	£ 66,497
Baseline | Retail credit cards | Gross exposure | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	6,490	7,064
Baseline | Retail credit cards | Gross exposure | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	2,151	1,827
Baseline | Retail credit cards | Impairment allowance | Financial assets at amortised cost | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(3,702)	(3,542)
Baseline | Retail credit cards | Impairment allowance | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(563)	(561)
Baseline | Retail credit cards | Impairment allowance | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(1,537)	(1,668)
Baseline | Retail credit cards | Impairment allowance | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ (1,602)	£ (1,313)
Baseline | Retail other | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0.4	0.4
Baseline | Retail other | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	6.1	6.1
Baseline | Retail other | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	58	57.9
Baseline | Retail other | Gross exposure | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 8,056	£ 8,758
Baseline | Retail other | Gross exposure | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	1,301	1,373
Baseline | Retail other | Gross exposure | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	162	164
Baseline | Retail other | Impairment allowance | Financial assets at amortised cost | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(206)	(211)
Baseline | Retail other | Impairment allowance | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(32)	(32)
Baseline | Retail other | Impairment allowance | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(80)	(84)
Baseline | Retail other | Impairment allowance | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ (94)	£ (95)
Baseline | Corporate loans | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0.1	0.2
Baseline | Corporate loans | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	2.3	2.7
Baseline | Corporate loans | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	1.9	2.2
Baseline | Corporate loans | Gross exposure | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 204,883	£ 175,903
Baseline | Corporate loans | Gross exposure | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	21,984	23,763
Baseline | Corporate loans | Gross exposure | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	3,561	3,436
Baseline | Corporate loans | Impairment allowance | Financial assets at amortised cost | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(851)	(978)
Baseline | Corporate loans | Impairment allowance | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(272)	(270)
Baseline | Corporate loans | Impairment allowance | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(513)	(633)
Baseline | Corporate loans | Impairment allowance | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(66)	(75)
Downside 1 | Loans and advances | Impairment allowance | Financial assets at amortised cost | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ (5,453)	£ (5,506)
Downside 1 | Retail mortgages | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0	0
Downside 1 | Retail mortgages | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0.1	0.2
Downside 1 | Retail mortgages | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	19.7	21
Downside 1 | Retail mortgages | Gross exposure | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 134,420	£ 142,543
Downside 1 | Retail mortgages | Gross exposure | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	25,532	23,836
Downside 1 | Retail mortgages | Gross exposure | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	1,546	1,672
Downside 1 | Retail mortgages | Impairment allowance | Financial assets at amortised cost | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(325)	(421)
Downside 1 | Retail mortgages | Impairment allowance | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(5)	(11)
Downside 1 | Retail mortgages | Impairment allowance | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(16)	(59)
Downside 1 | Retail mortgages | Impairment allowance | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ (304)	£ (351)
Downside 1 | Retail credit cards | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0.9	0.9
Downside 1 | Retail credit cards | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	24.7	24.7
Downside 1 | Retail credit cards | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	76	73.4
Downside 1 | Retail credit cards | Gross exposure | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 65,221	£ 66,580
Downside 1 | Retail credit cards | Gross exposure | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	6,605	7,183
Downside 1 | Retail credit cards | Gross exposure | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	2,151	1,827
Downside 1 | Retail credit cards | Impairment allowance | Financial assets at amortised cost | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(3,852)	(3,700)
Downside 1 | Retail credit cards | Impairment allowance | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(584)	(584)
Downside 1 | Retail credit cards | Impairment allowance | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(1,633)	(1,775)
Downside 1 | Retail credit cards | Impairment allowance | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ (1,635)	£ (1,341)
Downside 1 | Retail other | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0.4	0.4
Downside 1 | Retail other | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	6.7	6.3
Downside 1 | Retail other | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	58.6	58.5
Downside 1 | Retail other | Gross exposure | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 7,918	£ 8,631
Downside 1 | Retail other | Gross exposure | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	1,439	1,500
Downside 1 | Retail other | Gross exposure | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	162	164
Downside 1 | Retail other | Impairment allowance | Financial assets at amortised cost | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(224)	(223)
Downside 1 | Retail other | Impairment allowance | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(33)	(32)
Downside 1 | Retail other | Impairment allowance | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(96)	(95)
Downside 1 | Retail other | Impairment allowance | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ (95)	£ (96)
Downside 1 | Corporate loans | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0.2	0.2
Downside 1 | Corporate loans | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	2.7	2.8
Downside 1 | Corporate loans | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	2.1	2.4
Downside 1 | Corporate loans | Gross exposure | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 202,114	£ 172,328
Downside 1 | Corporate loans | Gross exposure | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	24,870	27,445
Downside 1 | Corporate loans | Gross exposure | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	3,561	3,436
Downside 1 | Corporate loans | Impairment allowance | Financial assets at amortised cost | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(1,052)	(1,162)
Downside 1 | Corporate loans | Impairment allowance | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(308)	(298)
Downside 1 | Corporate loans | Impairment allowance | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(670)	(782)
Downside 1 | Corporate loans | Impairment allowance | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(74)	(82)
Downside 2 | Loans and advances | Impairment allowance | Financial assets at amortised cost | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ (5,991)	£ (6,102)
Downside 2 | Retail mortgages | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0	0
Downside 2 | Retail mortgages | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0.1	0.4
Downside 2 | Retail mortgages | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	21.5	23.5
Downside 2 | Retail mortgages | Gross exposure | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 132,510	£ 138,925
Downside 2 | Retail mortgages | Gross exposure | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	28,707	28,822
Downside 2 | Retail mortgages | Gross exposure | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	1,546	1,672
Downside 2 | Retail mortgages | Impairment allowance | Financial assets at amortised cost | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(385)	(538)
Downside 2 | Retail mortgages | Impairment allowance | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(12)	(22)
Downside 2 | Retail mortgages | Impairment allowance | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(40)	(123)
Downside 2 | Retail mortgages | Impairment allowance | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ (333)	£ (393)
Downside 2 | Retail credit cards | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0.9	0.9
Downside 2 | Retail credit cards | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	25.9	26
Downside 2 | Retail credit cards | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	77.3	74.8
Downside 2 | Retail credit cards | Gross exposure | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 65,228	£ 66,580
Downside 2 | Retail credit cards | Gross exposure | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	6,799	7,387
Downside 2 | Retail credit cards | Gross exposure | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	2,151	1,827
Downside 2 | Retail credit cards | Impairment allowance | Financial assets at amortised cost | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(4,024)	(3,893)
Downside 2 | Retail credit cards | Impairment allowance | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(602)	(605)
Downside 2 | Retail credit cards | Impairment allowance | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(1,759)	(1,922)
Downside 2 | Retail credit cards | Impairment allowance | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ (1,663)	£ (1,366)
Downside 2 | Retail other | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0.4	0.4
Downside 2 | Retail other | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	6.7	6.4
Downside 2 | Retail other | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	59.9	59.1
Downside 2 | Retail other | Gross exposure | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 7,749	£ 8,479
Downside 2 | Retail other | Gross exposure | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	1,608	1,653
Downside 2 | Retail other | Gross exposure | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	162	164
Downside 2 | Retail other | Impairment allowance | Financial assets at amortised cost | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(235)	(233)
Downside 2 | Retail other | Impairment allowance | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(31)	(31)
Downside 2 | Retail other | Impairment allowance | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(107)	(105)
Downside 2 | Retail other | Impairment allowance | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ (97)	£ (97)
Downside 2 | Corporate loans | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0.2	0.2
Downside 2 | Corporate loans | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	3.1	3.2
Downside 2 | Corporate loans | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	2.3	2.6
Downside 2 | Corporate loans | Gross exposure | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 197,234	£ 167,541
Downside 2 | Corporate loans | Gross exposure | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	29,877	32,375
Downside 2 | Corporate loans | Gross exposure | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	3,561	3,436
Downside 2 | Corporate loans | Impairment allowance | Financial assets at amortised cost | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(1,347)	(1,438)
Downside 2 | Corporate loans | Impairment allowance | Financial assets at amortised cost | Stage 1 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(343)	(318)
Downside 2 | Corporate loans | Impairment allowance | Financial assets at amortised cost | Lifetime expected credit losses | Stage 2 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(923)	(1,031)
Downside 2 | Corporate loans | Impairment allowance | Financial assets at amortised cost | Lifetime expected credit losses | Stage 3 | Total weighted model ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ (81)	£ (89)

Credit Risk - Analysis of manag

Credit Risk - Analysis of management value at risk (VaR) (Details) - GBP (£) £ in Millions	Jun. 30, 2024	Dec. 31, 2023	Jun. 30, 2023
Average
Disclosure of nature and extent of risks arising from financial instruments [line items]
Value at risk	£ 29	£ 39	£ 45
Average | Credit risk
Disclosure of nature and extent of risks arising from financial instruments [line items]
Value at risk	22	32	48
Average | Interest rate risk
Disclosure of nature and extent of risks arising from financial instruments [line items]
Value at risk	16	15	16
Average | Equity risk
Disclosure of nature and extent of risks arising from financial instruments [line items]
Value at risk	6	5	6
Average | Basis risk
Disclosure of nature and extent of risks arising from financial instruments [line items]
Value at risk	6	10	16
Average | Spread risk
Disclosure of nature and extent of risks arising from financial instruments [line items]
Value at risk	5	7	10
Average | Foreign exchange risk
Disclosure of nature and extent of risks arising from financial instruments [line items]
Value at risk	4	4	3
Average | Commodity risk
Disclosure of nature and extent of risks arising from financial instruments [line items]
Value at risk	0	0	0
Average | Inflation risk
Disclosure of nature and extent of risks arising from financial instruments [line items]
Value at risk	4	4	9
Average | Diversification effect
Disclosure of nature and extent of risks arising from financial instruments [line items]
Value at risk	(34)	(38)	(63)
Favourable changes
Disclosure of nature and extent of risks arising from financial instruments [line items]
Value at risk	36	55	60
Favourable changes | Credit risk
Disclosure of nature and extent of risks arising from financial instruments [line items]
Value at risk	27	40	57
Favourable changes | Interest rate risk
Disclosure of nature and extent of risks arising from financial instruments [line items]
Value at risk	25	24	25
Favourable changes | Equity risk
Disclosure of nature and extent of risks arising from financial instruments [line items]
Value at risk	9	9	10
Favourable changes | Basis risk
Disclosure of nature and extent of risks arising from financial instruments [line items]
Value at risk	8	13	25
Favourable changes | Spread risk
Disclosure of nature and extent of risks arising from financial instruments [line items]
Value at risk	7	10	14
Favourable changes | Foreign exchange risk
Disclosure of nature and extent of risks arising from financial instruments [line items]
Value at risk	9	9	6
Favourable changes | Commodity risk
Disclosure of nature and extent of risks arising from financial instruments [line items]
Value at risk	1	1	1
Favourable changes | Inflation risk
Disclosure of nature and extent of risks arising from financial instruments [line items]
Value at risk	5	6	11
Unfavourable changes
Disclosure of nature and extent of risks arising from financial instruments [line items]
Value at risk	20	24	34
Unfavourable changes | Credit risk
Disclosure of nature and extent of risks arising from financial instruments [line items]
Value at risk	19	22	38
Unfavourable changes | Interest rate risk
Disclosure of nature and extent of risks arising from financial instruments [line items]
Value at risk	9	10	9
Unfavourable changes | Equity risk
Disclosure of nature and extent of risks arising from financial instruments [line items]
Value at risk	4	3	3
Unfavourable changes | Basis risk
Disclosure of nature and extent of risks arising from financial instruments [line items]
Value at risk	4	8	11
Unfavourable changes | Spread risk
Disclosure of nature and extent of risks arising from financial instruments [line items]
Value at risk	4	5	7
Unfavourable changes | Foreign exchange risk
Disclosure of nature and extent of risks arising from financial instruments [line items]
Value at risk	2	2	1
Unfavourable changes | Commodity risk
Disclosure of nature and extent of risks arising from financial instruments [line items]
Value at risk	0	0	0
Unfavourable changes | Inflation risk
Disclosure of nature and extent of risks arising from financial instruments [line items]
Value at risk	£ 2	£ 2	£ 6

Credit Risk - Analysis of funds

Credit Risk - Analysis of funds and eligible liabilities (Details) - GBP (£) £ in Millions	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023
Disclosure of nature and extent of risks arising from financial instruments [line items]
Total equity excluding non-controlling interests per the balance sheet	£ 71,173	£ 71,680	£ 71,204
Other equity instruments (recognised as AT1 capital)	(12,959)	(13,241)	(13,259)
Adjustment to retained earnings for foreseeable ordinary share dividends	(645)	(1,123)	(795)
Adjustment to retained earnings for foreseeable repurchase of shares	(222)	(796)	0
Adjustment to retained earnings for foreseeable other equity coupons	(41)	(46)	(43)
Goodwill and intangible assets	(7,839)		(7,794)
Defined benefit pension fund assets	(3,541)		(3,667)
Total own funds and eligible liabilities	117,785	116,824	115,308
Total RWAs	351,433	349,635	342,717
CET1 capital
Disclosure of nature and extent of risks arising from financial instruments [line items]
Additional value adjustments (PVA)	(1,887)	(1,834)	(1,901)
Goodwill and intangible assets	(7,835)	(7,807)	(7,790)
Deferred tax assets that rely on future profitability excluding temporary differences	(1,630)	(1,558)	(1,630)
Fair value reserves related to gains or losses on cash flow hedges	3,799	4,049	3,707
Excess of expected losses over impairment	(324)	(299)	(296)
Gains or losses on liabilities at fair value resulting from own credit	622	378	136
Defined benefit pension fund assets	(2,564)	(2,509)	(2,654)
Direct and indirect holdings by an institution of own CET1 instruments	(5)	(3)	(20)
Adjustment under IFRS 9 transitional arrangements	123	137	288
Other regulatory adjustments	90	116	357
Total own funds and eligible liabilities	47,695	47,144	47,304
AT1 capital
Disclosure of nature and extent of risks arising from financial instruments [line items]
Total equity excluding non-controlling interests per the balance sheet	13,000	13,263	13,263
Other regulatory adjustments	(41)	(22)	(60)
Total own funds and eligible liabilities	12,959	13,241	13,203
T1 capital
Disclosure of nature and extent of risks arising from financial instruments [line items]
Total own funds and eligible liabilities	60,654	60,385	60,507
T2 capital
Disclosure of nature and extent of risks arising from financial instruments [line items]
Total equity excluding non-controlling interests per the balance sheet	8,836	7,704	7,966
Qualifying T2 capital (including minority interests) issued by subsidiaries	385	401	569
Adjustment under IFRS 9 transitional arrangements	39	0	0
Other regulatory adjustments	(43)	(35)	(160)
Total own funds and eligible liabilities	69,871	68,455	68,882
Ineligible T2 capital
Disclosure of nature and extent of risks arising from financial instruments [line items]
Total own funds and eligible liabilities	(385)	(401)	(569)
Eligible liabilities
Disclosure of nature and extent of risks arising from financial instruments [line items]
Total own funds and eligible liabilities	£ 48,299	£ 48,770	£ 46,995

Segmental reporting - Analysis

Segmental reporting - Analysis of results by business (Details) - GBP (£) £ in Millions		6 Months Ended		12 Months Ended
		Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Disclosure of operating segments [line items]
Net interest income		£ 6,128	£ 6,323
Non-interest income/(expense)		7,149	7,199
Total income		13,277	13,522
Operating costs		(7,997)	(8,030)
UK regulatory levies	[1]	(120)	0
Litigation and conduct		(64)	(32)
Operating expenses		(8,181)	(8,062)
Other net income/(expenses)		16	(2)
Profit before impairment		5,112	5,458
Credit impairment (charges)/ releases		(897)	(896)	£ (1,881)
Profit before tax		4,215	4,562
Total assets		1,576,634		1,477,487
Total liabilities		1,504,801		1,405,623
Operating segments | Barclays UK
Disclosure of operating segments [line items]
Net interest income		3,146	3,278
Non-interest income/(expense)		567	644
Total income		3,713	3,922
Operating costs		(2,048)	(2,182)
UK regulatory levies		(54)	0
Litigation and conduct		(6)	3
Operating expenses		(2,108)	(2,179)
Other net income/(expenses)		0	0
Profit before impairment		1,605	1,743
Credit impairment (charges)/ releases		(66)	(208)
Profit before tax		1,539	1,535
Total assets		293,000		293,100
Total liabilities		262,500		264,200
Operating segments | Barclays UK Corporate Bank
Disclosure of operating segments [line items]
Net interest income		573	609
Non-interest income/(expense)		304	326
Total income		877	935
Operating costs		(456)	(423)
UK regulatory levies		(30)	0
Litigation and conduct		0	0
Operating expenses		(486)	(423)
Other net income/(expenses)		0	2
Profit before impairment		391	514
Credit impairment (charges)/ releases		(23)	60
Profit before tax		368	574
Total assets		64,000		61,500
Total liabilities		86,400		85,900
Operating segments | Barclays Private Bank and Wealth Management
Disclosure of operating segments [line items]
Net interest income		362	367
Non-interest income/(expense)		270	191
Total income		632	558
Operating costs		(434)	(326)
UK regulatory levies		(3)	0
Litigation and conduct		1	0
Operating expenses		(436)	(326)
Other net income/(expenses)		0	0
Profit before impairment		196	232
Credit impairment (charges)/ releases		3	(10)
Profit before tax		199	222
Total assets		35,800		32,000
Total liabilities		65,200		60,900
Operating segments | Barclays Investment Bank
Disclosure of operating segments [line items]
Net interest income		465	714
Non-interest income/(expense)		5,882	5,598
Total income		6,347	6,312
Operating costs		(3,858)	(3,845)
UK regulatory levies		(33)	0
Litigation and conduct		(11)	1
Operating expenses		(3,902)	(3,844)
Other net income/(expenses)		0	(1)
Profit before impairment		2,445	2,467
Credit impairment (charges)/ releases		(34)	(102)
Profit before tax		2,411	2,365
Total assets		1,113,800		1,019,100
Total liabilities		997,100		904,500
Operating segments | Barclays US Consumer Bank
Disclosure of operating segments [line items]
Net interest income		1,334	1,256
Non-interest income/(expense)		344	337
Total income		1,678	1,593
Operating costs		(796)	(828)
UK regulatory levies		0	0
Litigation and conduct		(4)	(4)
Operating expenses		(800)	(832)
Other net income/(expenses)		0	0
Profit before impairment		878	761
Credit impairment (charges)/ releases		(719)	(585)
Profit before tax		159	176
Total assets		32,100		33,600
Total liabilities		21,500		21,100
Head Office
Disclosure of operating segments [line items]
Net interest income		248	99
Non-interest income/(expense)		(218)	103
Total income		30	202
Operating costs		(406)	(425)
UK regulatory levies		0	0
Litigation and conduct		(43)	(33)
Operating expenses		(449)	(458)
Other net income/(expenses)		16	(3)
Profit before impairment		(403)	(259)
Credit impairment (charges)/ releases		(58)	(51)
Profit before tax		(461)	£ (310)
Total assets		37,900		38,200
Total liabilities		£ 72,100		£ 69,000
[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	£ 13,277	£ 13,522
United Kingdom
Disclosure of operating segments [line items]
Total income	6,829	7,312
Europe
Disclosure of operating segments [line items]
Total income	1,180	1,265
Americas
Disclosure of operating segments [line items]
Total income	4,574	4,187
Africa and Middle East
Disclosure of operating segments [line items]
Total income	39	42
Asia
Disclosure of operating segments [line items]
Total income	£ 655	£ 716

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	£ 5,360	£ 5,183
Other non-contract fee income	69	74
Fee and commission income	5,429	5,257
Fee and commission expense	(1,691)	(1,898)
Net fee and commission income	3,738	3,359
Transactional
Disclosure of disaggregation of revenue from contracts with customers [line items]
Total revenue from contracts with customers	2,461	2,387
Advisory
Disclosure of disaggregation of revenue from contracts with customers [line items]
Total revenue from contracts with customers	481	514
Brokerage and execution
Disclosure of disaggregation of revenue from contracts with customers [line items]
Total revenue from contracts with customers	945	1,164
Underwriting and syndication
Disclosure of disaggregation of revenue from contracts with customers [line items]
Total revenue from contracts with customers	1,454	1,036
Other
Disclosure of disaggregation of revenue from contracts with customers [line items]
Total revenue from contracts with customers	19	82
Operating segments | Barclays UK
Disclosure of disaggregation of revenue from contracts with customers [line items]
Total revenue from contracts with customers	688	766
Other non-contract fee income	0	0
Fee and commission income	688	766
Fee and commission expense	(177)	(188)
Net fee and commission income	511	578
Operating segments | Barclays UK | Transactional
Disclosure of disaggregation of revenue from contracts with customers [line items]
Total revenue from contracts with customers	551	560
Operating segments | Barclays UK | Advisory
Disclosure of disaggregation of revenue from contracts with customers [line items]
Total revenue from contracts with customers	0	57
Operating segments | Barclays UK | Brokerage and execution
Disclosure of disaggregation of revenue from contracts with customers [line items]
Total revenue from contracts with customers	107	122
Operating segments | Barclays UK | Underwriting and syndication
Disclosure of disaggregation of revenue from contracts with customers [line items]
Total revenue from contracts with customers	17	0
Operating segments | Barclays UK | Other
Disclosure of disaggregation of revenue from contracts with customers [line items]
Total revenue from contracts with customers	13	27
Operating segments | Barclays UK Corporate Bank
Disclosure of disaggregation of revenue from contracts with customers [line items]
Total revenue from contracts with customers	278	252
Other non-contract fee income	11	15
Fee and commission income	289	267
Fee and commission expense	(43)	(47)
Net fee and commission income	246	220
Operating segments | Barclays UK Corporate Bank | Transactional
Disclosure of disaggregation of revenue from contracts with customers [line items]
Total revenue from contracts with customers	232	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	0	1
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	234	152
Other non-contract fee income	0	3
Fee and commission income	234	155
Fee and commission expense	(19)	(14)
Net fee and commission income	215	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	0	1
Operating segments | Barclays Investment Bank
Disclosure of disaggregation of revenue from contracts with customers [line items]
Total revenue from contracts with customers	2,663	2,529
Other non-contract fee income	58	56
Fee and commission income	2,721	2,585
Fee and commission expense	(516)	(740)
Net fee and commission income	2,205	1,845
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	776	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	0	11
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	177	189
Other non-contract fee income	0	0
Fee and commission income	177	189
Fee and commission expense	(43)	(39)
Net fee and commission income	134	150
Head Office | Transactional
Disclosure of disaggregation of revenue from contracts with customers [line items]
Total revenue from contracts with customers	171	152
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	£ 6	£ 37

Staff costs (Details)

Staff costs (Details) - GBP (£) £ in Millions	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Compensation costs
Upfront bonus charge	£ 675	£ 665
Deferred bonus charge	269	263
Other incentives	35	42
Performance costs	979	970
Salaries	2,491	2,540
Social security costs	395	399
Post-retirement benefits	296	268
Other compensation costs	282	281
Total compensation costs	4,443	4,458
Other resourcing costs
Outsourcing	299	340
Redundancy and restructuring	138	63
Temporary staff costs	31	53
Other	53	71
Total other resourcing costs	521	527
Total staff costs	£ 4,964	£ 4,985
Barclays Group compensation costs as a % of total income	33.50%	33%

Infrastructure, administratio_3

Infrastructure, administration and general expenses (Details) - GBP (£) £ in Millions	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Infrastructure costs
Property and equipment	£ 857	£ 857
Depreciation and amortisation	843	902
Impairment of property, equipment and intangible assets	4	18
Total infrastructure costs	1,704	1,777
Administration and general expenses
Consultancy, legal and professional fees	388	336
Marketing and advertising	308	288
Other administration and general expenses	633	644
Total administration and general expenses	1,329	1,268
Total infrastructure, administration and general expenses	£ 3,033	£ 3,045

Earnings per share (Details)

Earnings per share (Details) - GBP (£) £ / shares in Units, £ in Millions, shares in Millions	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Earnings per share [abstract]
Profit attributable to ordinary equity holders of the parent	£ 2,787	£ 3,111
Basic weighted average number of shares in issue (in shares)	14,972	15,645
Number of potential ordinary shares (in shares)	445	470
Diluted weighted average number of shares (in shares)	15,417	16,115
Basic earnings per ordinary share (in GBP per share)	£ 0.186	£ 0.199
Diluted earnings per ordinary share (in GBP per share)	£ 0.181	£ 0.193

Dividends on ordinary shares -

Dividends on ordinary shares - Dividends on ordinary shares (Details) - GBP (£) £ / shares in Units, £ in Millions	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Dividends [Abstract]
Dividends paid, ordinary shares per share (in GBP per share)	£ 0.0530	£ 0.0500
Dividends paid, ordinary shares	£ 796	£ 793

Dividends on ordinary shares _2

Dividends on ordinary shares - Narrative (Details) - GBP (£) £ / shares in Units, £ in Millions	3 Months Ended	6 Months Ended			12 Months Ended
	Sep. 30, 2024	Jun. 30, 2024	Dec. 31, 2023	Jun. 30, 2023	Dec. 31, 2023
Disclosure of classes of share capital [line items]
Increase (decrease) through treasury share transactions, equity		£ (782)	£ (754)	£ (503)
Share buyback | Maximum
Disclosure of classes of share capital [line items]
Increase (decrease) through treasury share transactions, equity	£ 750
Ordinary shares
Disclosure of classes of share capital [line items]
Interim dividends, per share (in GBP per share)		£ 0.029		£ 0.027	£ 0.053
Number of shares comprising, one american depository share (in shares)		4
Qualifying American depository shares
Disclosure of classes of share capital [line items]
Interim dividends, per share (in GBP per share)		£ 0.116

Derivative financial instrume_3

Derivative financial instruments - Total recognised derivative assets/(liabilities) (Details) - GBP (£) £ in Millions	Jun. 30, 2024	Dec. 31, 2023
Disclosure of detailed information about financial instruments [line items]
Derivative assets	£ 253,614	£ 256,836
Derivative liabilities	(242,136)	(250,044)
Derivatives
Disclosure of detailed information about financial instruments [line items]
Contract notional amount	85,767,892	65,293,067
Fair value
Disclosure of detailed information about financial instruments [line items]
Derivative assets	253,614	256,836
Derivative liabilities	(242,136)	(250,044)
Derivatives in hedge accounting relationships
Disclosure of detailed information about financial instruments [line items]
Contract notional amount	306,067	299,576
Derivatives in hedge accounting relationships | Derivatives designated as cash flow hedges
Disclosure of detailed information about financial instruments [line items]
Contract notional amount	145,884	157,817
Derivatives in hedge accounting relationships | Derivatives designated as fair value hedges
Disclosure of detailed information about financial instruments [line items]
Contract notional amount	156,031	138,015
Derivatives in hedge accounting relationships | Derivatives designated as hedges of net investments
Disclosure of detailed information about financial instruments [line items]
Contract notional amount	4,152	3,744
Derivatives in hedge accounting relationships | Fair value
Disclosure of detailed information about financial instruments [line items]
Derivative assets designated in hedge accounting relationships	2,867	2,193
Derivative liabilities designated in hedge accounting relationships	(641)	(586)
Derivatives in hedge accounting relationships | Fair value | Derivatives designated as cash flow hedges
Disclosure of detailed information about financial instruments [line items]
Derivative assets designated in hedge accounting relationships	2,738	1,904
Derivative liabilities designated in hedge accounting relationships	(75)	(8)
Derivatives in hedge accounting relationships | Fair value | Derivatives designated as fair value hedges
Disclosure of detailed information about financial instruments [line items]
Derivative assets designated in hedge accounting relationships	122	178
Derivative liabilities designated in hedge accounting relationships	(549)	(533)
Derivatives in hedge accounting relationships | Fair value | Derivatives designated as hedges of net investments
Disclosure of detailed information about financial instruments [line items]
Derivative assets designated in hedge accounting relationships	7	111
Derivative liabilities designated in hedge accounting relationships	(17)	(45)
Held for trading
Disclosure of detailed information about financial instruments [line items]
Contract notional amount	85,461,825	64,993,491
Held for trading | Fair value
Disclosure of detailed information about financial instruments [line items]
Derivative financial assets held for trading	250,747	254,643
Derivative financial liabilities held for trading	(241,495)	(249,458)
Held for trading | Foreign exchange derivatives
Disclosure of detailed information about financial instruments [line items]
Contract notional amount	7,727,915	6,740,828
Held for trading | Foreign exchange derivatives | Fair value
Disclosure of detailed information about financial instruments [line items]
Derivative financial assets held for trading	78,912	87,518
Derivative financial liabilities held for trading	(72,582)	(83,225)
Held for trading | Interest rate derivatives
Disclosure of detailed information about financial instruments [line items]
Contract notional amount	73,107,979	54,134,591
Held for trading | Interest rate derivatives | Fair value
Disclosure of detailed information about financial instruments [line items]
Derivative financial assets held for trading	102,047	109,431
Derivative financial liabilities held for trading	(89,954)	(97,427)
Held for trading | Credit derivatives
Disclosure of detailed information about financial instruments [line items]
Contract notional amount	1,533,970	1,448,350
Held for trading | Credit derivatives | Fair value
Disclosure of detailed information about financial instruments [line items]
Derivative financial assets held for trading	6,449	7,662
Derivative financial liabilities held for trading	(7,169)	(8,630)
Held for trading | Equity and stock index and commodity derivatives
Disclosure of detailed information about financial instruments [line items]
Contract notional amount	3,091,961	2,669,722
Held for trading | Equity and stock index and commodity derivatives | Fair value
Disclosure of detailed information about financial instruments [line items]
Derivative financial assets held for trading	63,339	50,032
Derivative financial liabilities held for trading	£ (71,790)	£ (60,176)

Derivative financial instrume_4

Derivative financial instruments - Narrative (Details) - GBP (£) £ in Billions	6 Months Ended	12 Months Ended
	Jun. 30, 2024	Dec. 31, 2023
Derivative financial liabilities
Disclosure of offsetting of financial assets [line items]
Gross financial assets set off against financial liabilities subject to offsetting, enforceable master netting arrangements or similar agreements	£ 51	£ 54
Derivative liability exposures	218	223
Non-cash assets pledged as collateral	4	4
Cash collateral netted | Derivative financial liabilities
Disclosure of offsetting of financial assets [line items]
Gross financial assets set off against financial liabilities subject to offsetting, enforceable master netting arrangements or similar agreements	10	9
Derivative liability exposures	23	24
Derivative financial assets
Disclosure of offsetting of financial assets [line items]
Gross financial liabilities set off against financial assets subject to offsetting, enforceable master netting arrangements or similar agreements	51	56
Derivative asset exposures	227	230
Non-cash collateral	11	10
Derivative financial assets | Cash collateral netted
Disclosure of offsetting of financial assets [line items]
Gross financial liabilities set off against financial assets subject to offsetting, enforceable master netting arrangements or similar agreements	9	8
Derivative asset exposures	£ 32	£ 31

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	£ 197,306	£ 174,605
Financial assets at fair value through the income statement	215,206	206,651
Derivative financial instruments	253,614	256,836
Financial assets at fair value through other comprehensive income	82,747	71,836
Trading portfolio liabilities	(59,315)	(58,669)
Financial liabilities designated at fair value	(320,957)	(297,539)
Derivative financial instruments	(242,136)	(250,044)
Fair value
Disclosure of detailed information about financial instruments [line items]
Trading portfolio assets	197,306	174,605
Financial assets at fair value through the income statement	215,206	206,651
Derivative financial instruments	253,614	256,836
Financial assets at fair value through other comprehensive income	82,747	71,836
Investment property	1	2
Total assets	748,874	709,930
Trading portfolio liabilities	(59,315)	(58,669)
Financial liabilities designated at fair value	(320,957)	(297,539)
Derivative financial instruments	(242,136)	(250,044)
Total liabilities	(622,408)	(606,252)
Quoted market prices (Level 1) | Fair value
Disclosure of detailed information about financial instruments [line items]
Trading portfolio assets	98,992	94,658
Financial assets at fair value through the income statement	7,502	5,831
Derivative financial instruments	86	107
Financial assets at fair value through other comprehensive income	32,151	30,247
Investment property	0	0
Total assets	138,731	130,843
Trading portfolio liabilities	(33,309)	(29,274)
Financial liabilities designated at fair value	(182)	(117)
Derivative financial instruments	(66)	(81)
Total liabilities	(33,557)	(29,472)
Observable inputs (Level 2) | Fair value
Disclosure of detailed information about financial instruments [line items]
Trading portfolio assets	89,588	73,438
Financial assets at fair value through the income statement	198,187	192,571
Derivative financial instruments	250,695	253,189
Financial assets at fair value through other comprehensive income	48,142	40,511
Investment property	0	0
Total assets	586,612	559,709
Trading portfolio liabilities	(25,621)	(29,027)
Financial liabilities designated at fair value	(318,283)	(296,200)
Derivative financial instruments	(237,735)	(245,310)
Total liabilities	(581,639)	(570,537)
Significant unobservable inputs (Level 3)
Disclosure of detailed information about financial instruments [line items]
Total assets	23,531	19,378
Total liabilities	(7,212)	(6,243)
Significant unobservable inputs (Level 3) | 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	9,517	8,249
Derivative financial instruments	2,833	3,540
Financial assets at fair value through other comprehensive income	2,454	1,078
Investment property	1	2
Total assets	23,531	19,378
Trading portfolio liabilities	(385)	(368)
Financial liabilities designated at fair value	(2,492)	(1,222)
Derivative financial instruments	(4,335)	(4,653)
Total liabilities	£ (7,212)	£ (6,243)

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]
Financial assets, at fair value	£ 23,531	£ 19,378
Financial liabilities, at fair value	(7,212)	(6,243)
Issued debt
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	0	0
Financial liabilities, at fair value	(1,539)	(637)
Corporate debt
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	2,261	1,867
Financial liabilities, at fair value	(353)	(352)
Reverse repurchase and repurchase agreements
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	620	209
Financial liabilities, at fair value	(934)	(517)
Loans
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	12,932	10,614
Financial liabilities, at fair value	0	0
Asset backed securities
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	2,145	603
Financial liabilities, at fair value	(2)	0
Private equity investments
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	1,128	1,375
Financial liabilities, at fair value	(18)	(10)
Other
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	1,612	1,170
Financial liabilities, at fair value	(31)	(74)
Interest rate derivatives
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	1,623	2,211
Financial liabilities, at fair value	(1,538)	(1,701)
Foreign exchange derivatives
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	175	111
Financial liabilities, at fair value	(118)	(91)
Credit derivatives
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	216	241
Financial liabilities, at fair value	(798)	(820)
Equity derivatives
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	819	977
Financial liabilities, at fair value	£ (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	£ 253,614		£ 256,836
Derivative financial liabilities	(242,136)		£ (250,044)
Significant unobservable inputs (Level 3)
Categories of financial assets [abstract]
Beginning balance, financial assets	19,378
Ending balance, financial assets	23,531
Categories of financial liabilities [abstract]
Beginning balance, financial liabilities	(6,243)
Ending balance, financial liabilities	(7,212)
Recurring fair value measurement | Significant unobservable inputs (Level 3)
Net assets (liabilities) [abstract]
Beginning balance, assets (liabilities)	13,135	£ 13,326
Purchases, fair value measurement, assets (liabilities) net	7,559	3,947
Sales, fair value measurement, assets (liabilities) net	(2,457)	(2,844)
Issues, fair value measurement, assets (liabilities) net	(646)	(226)
Settlements, fair value measurement, assets (liabilities) net	(1,247)	(1,245)
Total gains or losses recognised in OCI, assets (liabilities) net	0	(2)
Transfers into Level 3 of fair value hierarchy, assets (liabilities) net	443	1,394
Transfers out of Level 3 of fair value hierarchy, assets (liabilities) net	(417)	96
Ending balance, assets (liabilities)	16,319	14,046
Derivative financial assets	2,833	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 and losses in the period recognised in the income statement, assets (liabilities) net	(215)	(356)
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 and losses in the period recognised in the income statement, assets (liabilities) net	164	(44)
Recurring fair value measurement | Investment property | Significant unobservable inputs (Level 3)
Categories of financial assets [abstract]
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 or 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
Categories of financial assets [abstract]
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
Categories of financial assets [abstract]
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)	(1,113)	(1,189)
Purchases, fair value measurement, assets (liabilities) net	(182)	(279)
Sales, fair value measurement, assets (liabilities) net	32	5
Issues, fair value measurement, assets (liabilities) net	(19)	0
Settlements, fair value measurement, assets (liabilities) net	(169)	(47)
Total gains or losses recognised in OCI, assets (liabilities) net	0	0
Transfers into Level 3 of fair value hierarchy, assets (liabilities) net	21	504
Transfers out of Level 3 of fair value hierarchy, assets (liabilities) net	109	459
Ending balance, assets (liabilities)	(1,502)	(735)
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 and losses in the period recognised in the income statement, assets (liabilities) net	(181)	(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 and 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)
Categories of financial liabilities [abstract]
Beginning balance, financial liabilities	(368)	(56)
Purchases, fair value measurement, liabilities	(24)	(16)
Sales, fair value measurement, liabilities	17	4
Issues, fair value measurement, liabilities	0	0
Settlements, fair value measurement, liabilities	0	0
Total gains or losses recognised in OCI, liabilities	0	0
Transfers into Level 3 of fair value hierarchy, liabilities	(34)	(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
Categories of financial liabilities [abstract]
Total gains and 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
Categories of financial liabilities [abstract]
Total gains and 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)
Categories of financial liabilities [abstract]
Beginning balance, financial liabilities	(1,222)	(1,050)
Purchases, fair value measurement, liabilities	(6)	0
Sales, fair value measurement, liabilities	28	0
Issues, fair value measurement, liabilities	(627)	(226)
Settlements, fair value measurement, liabilities	16	0
Total gains or 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	(2,492)	(1,100)
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
Categories of financial liabilities [abstract]
Total gains and 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
Categories of financial liabilities [abstract]
Total gains and losses in the period recognised in the income statement, liabilities	(21)	(1)
Interest rate derivatives | Significant unobservable inputs (Level 3)
Categories of financial assets [abstract]
Beginning balance, financial assets	2,211
Ending balance, financial assets	1,623
Categories of financial liabilities [abstract]
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)	510	(496)
Purchases, fair value measurement, assets (liabilities) net	10	2
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	(135)	19
Total gains or 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)	85	480
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 and 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 and losses in the period recognised in the income statement, assets (liabilities) net	0	0
Foreign exchange derivatives | Significant unobservable inputs (Level 3)
Categories of financial assets [abstract]
Beginning balance, financial assets	111
Ending balance, financial assets	175
Categories of financial liabilities [abstract]
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)	20	39
Purchases, fair value measurement, assets (liabilities) net	(1)	0
Sales, fair value measurement, assets (liabilities) net	(1)	0
Issues, fair value measurement, assets (liabilities) net	0	0
Settlements, fair value measurement, assets (liabilities) net	19	0
Total gains or losses recognised in OCI, assets (liabilities) net	0	0
Transfers into Level 3 of fair value hierarchy, assets (liabilities) net	21	12
Transfers out of Level 3 of fair value hierarchy, assets (liabilities) net	(7)	(15)
Ending balance, assets (liabilities)	57	5
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 and 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 and losses in the period recognised in the income statement, assets (liabilities) net	0	0
Credit derivatives | Significant unobservable inputs (Level 3)
Categories of financial assets [abstract]
Beginning balance, financial assets	241
Ending balance, financial assets	216
Categories of financial liabilities [abstract]
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)	(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 or 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)	(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 and 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 and losses in the period recognised in the income statement, assets (liabilities) net	0	0
Equity derivatives | Significant unobservable inputs (Level 3)
Categories of financial assets [abstract]
Beginning balance, financial assets	977
Ending balance, financial assets	819
Categories of financial liabilities [abstract]
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)	(1,064)	(419)
Purchases, fair value measurement, assets (liabilities) net	(196)	(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 or 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)	(1,062)	(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 and losses in the period recognised in the income statement, assets (liabilities) net	(7)	(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 and losses in the period recognised in the income statement, assets (liabilities) net	0	0
Corporate debt | Significant unobservable inputs (Level 3)
Categories of financial assets [abstract]
Beginning balance, financial assets	1,867
Ending balance, financial assets	2,261
Categories of financial liabilities [abstract]
Beginning balance, financial liabilities	(352)
Ending balance, financial liabilities	(353)
Loans | Significant unobservable inputs (Level 3)
Categories of financial assets [abstract]
Beginning balance, financial assets	10,614
Ending balance, financial assets	12,932
Categories of financial liabilities [abstract]
Beginning balance, financial liabilities	0
Ending balance, financial liabilities	0
Asset backed securities | Significant unobservable inputs (Level 3)
Categories of financial assets [abstract]
Beginning balance, financial assets	603
Ending balance, financial assets	2,145
Categories of financial liabilities [abstract]
Beginning balance, financial liabilities	0
Ending balance, financial liabilities	(2)
Private equity investments | Significant unobservable inputs (Level 3)
Categories of financial assets [abstract]
Beginning balance, financial assets	1,375
Ending balance, financial assets	1,128
Categories of financial liabilities [abstract]
Beginning balance, financial liabilities	(10)
Ending balance, financial liabilities	(18)
Reverse repurchase and repurchase agreements | Significant unobservable inputs (Level 3)
Categories of financial assets [abstract]
Beginning balance, financial assets	209
Ending balance, financial assets	620
Categories of financial liabilities [abstract]
Beginning balance, financial liabilities	(517)
Ending balance, financial liabilities	(934)
Other | Significant unobservable inputs (Level 3)
Categories of financial assets [abstract]
Beginning balance, financial assets	1,170
Ending balance, financial assets	1,612
Categories of financial liabilities [abstract]
Beginning balance, financial liabilities	(74)
Ending balance, financial liabilities	(31)
Trading portfolio assets | Recurring fair value measurement | Significant unobservable inputs (Level 3)
Categories of financial assets [abstract]
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 or 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
Categories of financial assets [abstract]
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
Categories of financial assets [abstract]
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)
Categories of financial assets [abstract]
Beginning balance, financial assets	681	597
Purchases, fair value measurement, assets	831	336
Sales, fair value measurement, assets	(225)	(118)
Issues, fair value measurement, assets	0	0
Settlements, fair value measurement, assets	(49)	(53)
Total gains or 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
Categories of financial assets [abstract]
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
Categories of financial assets [abstract]
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)
Categories of financial assets [abstract]
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 or 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
Categories of financial assets [abstract]
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
Categories of financial assets [abstract]
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)
Categories of financial assets [abstract]
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
Settlements, fair value measurement, assets	0
Total gains or losses recognised in OCI, assets	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
Categories of financial assets [abstract]
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
Categories of financial assets [abstract]
Total gains and losses in the period recognised in the income statement, assets	0
Trading portfolio assets | Other | Recurring fair value measurement | Significant unobservable inputs (Level 3)
Categories of financial assets [abstract]
Beginning balance, financial assets	1,041	871
Purchases, fair value measurement, assets	765	706
Sales, fair value measurement, assets	(339)	(328)
Issues, fair value measurement, assets	0	0
Settlements, fair value measurement, assets	(4)	(38)
Total gains or 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
Categories of financial assets [abstract]
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
Categories of financial assets [abstract]
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)
Categories of financial assets [abstract]
Beginning balance, financial assets	8,249	9,125
Purchases, fair value measurement, assets	2,804	1,897
Sales, fair value measurement, assets	(1,484)	(977)
Issues, fair value measurement, assets	0	0
Settlements, fair value measurement, assets	(380)	(795)
Total gains or losses recognised in OCI, assets	0	0
Transfers into Level 3 of fair value hierarchy, assets	291	120
Transfers out of Level 3 of fair value hierarchy, assets	(118)	(159)
Ending balance, financial assets	9,517	9,018
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
Categories of financial assets [abstract]
Total gains and losses in the period recognised in the income statement, assets	(19)	(153)
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
Categories of financial assets [abstract]
Total gains and losses in the period recognised in the income statement, assets	174	(40)
Financial assets at fair value through the income statement | Corporate debt | Recurring fair value measurement | Significant unobservable inputs (Level 3)
Categories of financial assets [abstract]
Beginning balance, financial assets	888	1,079
Purchases, fair value measurement, assets	0	0
Sales, fair value measurement, assets	(2)	(120)
Issues, fair value measurement, assets	0	0
Settlements, fair value measurement, assets	0	0
Total gains or 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
Categories of financial assets [abstract]
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
Categories of financial assets [abstract]
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)
Categories of financial assets [abstract]
Beginning balance, financial assets	5,612	6,396
Purchases, fair value measurement, assets	1,760	1,837
Sales, fair value measurement, assets	(999)	(823)
Issues, fair value measurement, assets	0	0
Settlements, fair value measurement, assets	(344)	(771)
Total gains or losses recognised in OCI, assets	0	0
Transfers into Level 3 of fair value hierarchy, assets	139	50
Transfers out of Level 3 of fair value hierarchy, assets	(70)	(114)
Ending balance, financial assets	6,080	6,476
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
Categories of financial assets [abstract]
Total gains and losses in the period recognised in the income statement, assets	(36)	(57)
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
Categories of financial assets [abstract]
Total gains and losses in the period recognised in the income statement, assets	18	(42)
Financial assets at fair value through the income statement | Asset backed securities | Recurring fair value measurement | Significant unobservable inputs (Level 3)
Categories of financial assets [abstract]
Beginning balance, financial assets	85	192
Purchases, fair value measurement, assets	590	10
Sales, fair value measurement, assets	(1)	(4)
Issues, fair value measurement, assets	0	0
Settlements, fair value measurement, assets	(12)	0
Total gains or 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
Categories of financial assets [abstract]
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
Categories of financial assets [abstract]
Total gains and losses in the period recognised in the income statement, assets	0	0
Financial assets at fair value through the income statement | Private equity investments | Recurring fair value measurement | Significant unobservable inputs (Level 3)
Categories of financial assets [abstract]
Beginning balance, financial assets	1,371	1,284
Purchases, fair value measurement, assets	112	50
Sales, fair value measurement, assets	(482)	(22)
Issues, fair value measurement, assets	0	0
Settlements, fair value measurement, assets	(17)	(3)
Total gains or losses recognised in OCI, assets	0	0
Transfers into Level 3 of fair value hierarchy, assets	0	2
Transfers out of Level 3 of fair value hierarchy, assets	(3)	0
Ending balance, financial assets	1,124	1,275
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
Categories of financial assets [abstract]
Total gains and losses in the period recognised in the income statement, assets	3	(50)
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
Categories of financial assets [abstract]
Total gains and losses in the period recognised in the income statement, assets	140	14
Financial assets at fair value through the income statement | Reverse repurchase and repurchase agreements | Recurring fair value measurement | Significant unobservable inputs (Level 3)
Categories of financial assets [abstract]
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 or 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
Categories of financial assets [abstract]
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
Categories of financial assets [abstract]
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)
Categories of financial assets [abstract]
Beginning balance, financial assets	84	136
Purchases, fair value measurement, assets	45	0
Sales, fair value measurement, assets	0	(8)
Issues, fair value measurement, assets	0	0
Settlements, fair value measurement, assets	(7)	(21)
Total gains or 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	129	97
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
Categories of financial assets [abstract]
Total gains and losses in the period recognised in the income statement, assets	0	(2)
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
Categories of financial assets [abstract]
Total gains and losses in the period recognised in the income statement, assets	9	(9)
Assets at fair value through other comprehensive income | Recurring fair value measurement | Significant unobservable inputs (Level 3)
Categories of financial assets [abstract]
Beginning balance, financial assets	1,078	11
Purchases, fair value measurement, assets	1,854	60
Sales, fair value measurement, assets	(42)	0
Issues, fair value measurement, assets	0	0
Settlements, fair value measurement, assets	0	(1)
Total gains or losses recognised in OCI, assets	0	(2)
Transfers into Level 3 of fair value hierarchy, assets	0	46
Transfers out of Level 3 of fair value hierarchy, assets	(448)	0
Ending balance, financial assets	2,454	114
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
Categories of financial assets [abstract]
Total gains and losses in the period recognised in the income statement, assets	1	0
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
Categories of financial assets [abstract]
Total gains and losses in the period recognised in the income statement, assets	11	0
Assets at fair value through other comprehensive income | Corporate debt | Recurring fair value measurement | Significant unobservable inputs (Level 3)
Categories of financial assets [abstract]
Beginning balance, financial assets	298	0
Purchases, fair value measurement, assets	0	13
Sales, fair value measurement, assets	0	0
Issues, fair value measurement, assets	0	0
Settlements, fair value measurement, assets	0	0
Total gains or losses recognised in OCI, assets	0	0
Transfers into Level 3 of fair value hierarchy, assets	0	46
Transfers out of Level 3 of fair value hierarchy, assets	(248)	0
Ending balance, financial assets	50	59
Assets at fair value through other comprehensive income | Corporate debt | Recurring fair value measurement | Significant unobservable inputs (Level 3) | Financial assets at fair value through profit or loss, category trading
Categories of financial assets [abstract]
Total gains and losses in the period recognised in the income statement, assets	0	0
Assets at fair value through other comprehensive income | Corporate debt | Recurring fair value measurement | Significant unobservable inputs (Level 3) | Financial assets at fair value through profit or loss, category other income
Categories of financial assets [abstract]
Total gains and losses in the period recognised in the income statement, assets	0	0
Assets at fair value through other comprehensive income | Loans | Recurring fair value measurement | Significant unobservable inputs (Level 3)
Categories of financial assets [abstract]
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 or 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
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
Categories of financial assets [abstract]
Total gains and losses in the period recognised in the income statement, assets	1	0
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
Categories of financial assets [abstract]
Total gains and losses in the period recognised in the income statement, assets	11	0
Assets at fair value through other comprehensive income | Asset backed securities | Recurring fair value measurement | Significant unobservable inputs (Level 3)
Categories of financial assets [abstract]
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 or 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
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
Categories of financial assets [abstract]
Total gains and losses in the period recognised in the income statement, assets	0	0
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
Categories of financial assets [abstract]
Total gains and losses in the period recognised in the income statement, assets	0	0
Assets at fair value through other comprehensive income | Private equity investments | Recurring fair value measurement | Significant unobservable inputs (Level 3)
Categories of financial assets [abstract]
Beginning balance, financial assets	4	7
Purchases, fair value measurement, assets	0	0
Sales, fair value measurement, assets	0	0
Issues, fair value measurement, assets	0	0
Settlements, fair value measurement, assets	0	0
Total gains or losses recognised in OCI, assets	0	(2)
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	4	5
Assets at fair value through other comprehensive income | Private equity investments | Recurring fair value measurement | Significant unobservable inputs (Level 3) | Financial assets at fair value through profit or loss, category trading
Categories of financial assets [abstract]
Total gains and losses in the period recognised in the income statement, assets	0	0
Assets at fair value through other comprehensive income | Private equity investments | Recurring fair value measurement | Significant unobservable inputs (Level 3) | Financial assets at fair value through profit or loss, category other income
Categories of financial assets [abstract]
Total gains and losses in the period recognised in the income statement, assets	0	0
Assets at fair value through other comprehensive income | Other | Recurring fair value measurement | Significant unobservable inputs (Level 3)
Categories of financial assets [abstract]
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 or 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
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
Categories of financial assets [abstract]
Total gains and losses in the period recognised in the income statement, assets	0	0
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
Categories of financial assets [abstract]
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	£ 3,228	£ 3,786
Other income	23	44
Other compre hensive income	(1,002)	(2,823)
Significant unobservable inputs (Level 3)
Disclosure of detailed information about financial instruments [line items]
Trading income	(192)	(348)
Other income	48	(44)
Other compre hensive income	0	(2)
Total	(144)	(394)
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 compre hensive 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	(180)	(186)
Other income	0	0
Other compre hensive income	0	0
Total	(180)	(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 compre hensive 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	(10)	(1)
Other compre hensive income	0	0
Total	(39)	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 compre hensive 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	1	(144)
Other income	47	(40)
Other compre hensive income	0	0
Total	48	(184)
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	1	0
Other income	11	0
Other compre hensive income	0	(2)
Total	£ 12	£ (2)

Fair value of financial instr_7

Fair value of financial instruments - Sensitivity analysis of valuations using unobservable inputs (Details) - Significant unobservable inputs (Level 3) - Recurring fair value measurement - 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	£ 1,409	£ 1,286
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	4
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	(1,718)	(1,629)
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)	(4)
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	687	612
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	(851)	(801)
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	215	263
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	1
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	(215)	(263)
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	(1)
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	95	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	(108)	(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
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)	£ 1,445	£ 1,290
Decrease in fair value measurement due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions, assets (liabilities)	1,754	1,633
Exit price adjustments derived from market bid-offer spreads
Disclosure of detailed information about financial instruments [line items]
Increase (decrease) in derivative fair value adjustments	(59)
Fair value adjustments	(510)	(569)
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]
Increase (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]
Increase (decrease) in derivative fair value adjustments	(33)
Fair value adjustments	111	144
Brokered certificates of deposit
Disclosure of detailed information about financial instruments [line items]
Deposits at amortised cost	3,829	5,162
Financial instruments at fair value, category | Recurring fair value measurement | Significant unobservable inputs (Level 3)
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	218	205
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	72	57
Financial instruments at amortised cost, category | Recurring fair value measurement | Significant unobservable inputs (Level 3)
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	187	192
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	£ 5	£ 24

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	£ (510)	£ (569)
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
Categories of financial assets [abstract]
Debt securities at amortised cost	£ 61,700	£ 56,749
Reverse repurchase agreements and other similar secured lending	4,724	2,594
Categories of financial liabilities [abstract]
Repurchase agreements and other similar secured borrowing	(52,352)	(41,601)
Debt securities in issue	(96,772)	(96,825)
Subordinated liabilities	(11,795)	(10,494)	£ (11,423)
Fair value
Categories of financial assets [abstract]
Debt securities at amortised cost	60,738	55,437
Loans and advances at amortised cost	333,405	334,706
Reverse repurchase agreements and other similar secured lending	4,724	2,594
Categories of financial liabilities [abstract]
Deposits at amortised cost	(557,528)	(538,502)
Repurchase agreements and other similar secured borrowing	(52,352)	(41,601)
Debt securities in issue	(98,656)	(98,123)
Subordinated liabilities	(12,242)	(10,803)
Carrying amount
Categories of financial assets [abstract]
Debt securities at amortised cost	61,700	56,749
Loans and advances at amortised cost	337,809	342,747
Reverse repurchase agreements and other similar secured lending	4,724	2,594
Categories of financial liabilities [abstract]
Deposits at amortised cost	(557,452)	(538,789)
Repurchase agreements and other similar secured borrowing	(52,352)	(41,601)
Debt securities in issue	(96,772)	(96,825)
Subordinated liabilities	£ (11,795)	£ (10,494)

Subordinated liabilities - Subo

Subordinated liabilities - Subordinated liabilities (Details) - GBP (£) £ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2024	Dec. 31, 2023
Subordinated liabilities [abstract]
Opening balance as at 1 January	£ 10,494	£ 11,423
Issuances	1,355	1,523
Redemptions	0	(2,239)
Other	(54)	(213)
Closing balance	£ 11,795	£ 10,494

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	£ 1,355	£ 1,523
Barclays Plc | 4.973% Fixed Rate Resetting Tier 2 Subordinated Callable Notes | Fixed interest rate
Disclosure of detailed information about borrowings [line items]
Issuances	£ 1,276
Borrowings, interest rate	4.973%
Other subsidiaries | USD Floating Rate 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	£ 1,292	£ 1,584
Customer redress
Disclosure of other provisions [line items]
Provisions	204	295
Legal, competition and regulatory matters
Disclosure of other provisions [line items]
Provisions	95	99
Redundancy and restructuring
Disclosure of other provisions [line items]
Provisions	241	397
Undrawn contractually committed facilities and guarantees
Disclosure of other provisions [line items]
Provisions	474	504
Sundry provisions
Disclosure of other provisions [line items]
Provisions	£ 278	£ 289

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 (deficit) in plan	£ 3,300	£ 3,400
Pension defined benefit plans | Defined benefit plans other than multi-employer plans, state plans and plans that share risks between entities under common control | United Kingdom
Disclosure of fair value of plan assets [line items]
Surplus (deficit) in plan	£ 3,500	£ 3,600
Deficit contributions valuation recovery plan 2022 | Pension defined benefit plans | Defined benefit plans other than multi-employer plans, state plans and plans that share risks between entities under common control | United Kingdom
Disclosure of fair value of plan assets [line items]
Surplus (deficit) in plan			£ 2,020
Deficit contributions valuation recovery plan 2019 | Pension defined benefit plans | Defined benefit plans other than multi-employer plans, state plans and plans that share risks between entities under common control | United Kingdom
Disclosure of fair value of plan assets [line items]
Surplus (deficit) 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	£ (882)	£ (77)
Currency translation reserve
Disclosure of reserves within equity [line items]
Other reserves	3,587	3,671
Fair value through other comprehensive income reserve
Disclosure of reserves within equity [line items]
Other reserves	(1,635)	(1,366)
Cash flow hedging reserve
Disclosure of reserves within equity [line items]
Other reserves	(3,797)	(3,707)
Own credit reserve
Disclosure of reserves within equity [line items]
Other reserves	(702)	(240)
Other reserves and treasury shares
Disclosure of reserves within equity [line items]
Other reserves	£ 1,665	£ 1,565

Other reserves - Narrative (Det

Other reserves - Narrative (Details) - GBP (£) £ in Millions, shares in Millions	6 Months Ended		12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Disclosure of reserves within equity [line items]
Other reserves	£ (882)		£ (77)
Repurchase of treasury shares (in shares)	389		837
Currency translation reserve
Disclosure of reserves within equity [line items]
Other reserves	£ 3,587		£ 3,671
Increase (decrease) in equity	84	£ 1,101
Tax	4	9
Fair value through other comprehensive income reserve
Disclosure of reserves within equity [line items]
Other reserves	(1,635)		(1,366)
Increase (decrease) in equity	269	(194)
Tax	101	(78)
Gains (losses) on financial assets measured at fair value through other comprehensive income, before tax	(185)	299
Reclassification adjustments on financial assets measured at fair value through other comprehensive income, before tax	186	26
Cash flow hedging reserve
Disclosure of reserves within equity [line items]
Other reserves	(3,797)		(3,707)
Increase (decrease) in equity	90		(3,528)
Tax	28	(1,342)
Gains (losses) on financial assets measured at fair value through other comprehensive income, before tax	(1,057)	3,120
Reclassification adjustments on financial assets measured at fair value through other comprehensive income, before tax	(939)	(1,750)
Own credit reserve
Disclosure of reserves within equity [line items]
Other reserves	(702)		(240)
Increase (decrease) in equity	462	707
Tax	173	273
Gains (losses) on change in value of foreign currency basis spreads, before tax	635	£ 983
Other reserves and treasury shares
Disclosure of reserves within equity [line items]
Other reserves	1,665		1,565
Increase (decrease) in equity	(97)		(209)
Treasury shares
Disclosure of reserves within equity [line items]
Increase (decrease) in equity	£ (3)		£ 8

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	£ 25,486	£ 25,340
Commitments
Disclosure of contingent liabilities [line items]
Notional amount	404,850	390,437
Guarantees and letters of credit pledged as collateral security | Contingent liabilities and financial guarantees
Disclosure of contingent liabilities [line items]
Notional amount	17,052	17,353
Performance guarantees, acceptances and endorsements | Contingent liabilities and financial guarantees
Disclosure of contingent liabilities [line items]
Notional amount	8,434	7,987
Documentary credits and other short-term trade related transactions | Commitments
Disclosure of contingent liabilities [line items]
Notional amount	2,489	2,352
Standby facilities, credit lines and other commitments | Commitments
Disclosure of contingent liabilities [line items]
Notional amount	£ 402,361	£ 388,085

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 ($)

Jan. 31, 2017 lawsuit

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, 2016 lawsuit

Dec. 31, 2013 GBP (£)

Dec. 31, 2008 USD ($) agreement

Disclosure of contingent liabilities [line items]

Losses on litigation settlements | £

£ 64

£ 32

Sterling LIBOR Case in SDNY

Disclosure of contingent liabilities [line items]

Number of lawsuits with specified damages sought

2

Non-US forex civil actions

Disclosure of contingent liabilities [line items]

Number of lawsuits with specified damages sought

2

2

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

Disclosure of contingent liabilities [line items]

Number of lawsuits with specified damages sought

1

1

Civil actions in respect of VRDO - SNDY

Disclosure of contingent liabilities [line items]

Number of lawsuits with specified damages sought

3

3

Civil actions in respect of the US Anti-Terrorism Act - EDNY

Disclosure of contingent liabilities [line items]

Number of lawsuits dismissed

3

3

Number of lawsuits with specified damages sought

6

6

Number of plaintiffs | plaintiff

4,000

4,000

Number of lawsuits dismissed appealed

1

Number of separate lawsuits

1

1

Number of initial lawsuits amended

1

Number of lawsuits dismissed subject to appeal

2

2

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 specified damages sought

2

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

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

Disclosure of contingent liabilities [line items]

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

128

Interest Rate Swap And Credit Default Swap US Civil Actions

Disclosure of contingent liabilities [line items]

Number of lawsuits with specified damages sought

1

1

Civil Actions In Respect Of The US Anti-Terrorism Act

Disclosure of contingent liabilities [line items]

Number of lawsuits with specified damages sought

8

8

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

Other Proceedings

Disclosure of contingent liabilities [line items]

Number of arbitration requests received | request

2

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 | USD LIBOR Cases in MDL Court | Lawsuits with specified damages sought

Disclosure of contingent liabilities [line items]

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

$ 100

Number of lawsuits with specified damages sought

1

1

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