Barclays (BCS) 20-F 18 Feb 21 2020 FY Annual report (foreign) Financial data

Cover

Cover	12 Months Ended
	Dec. 31, 2020shares
Cover
Document Type	20-F
Amendment Flag	false
Document Period End Date	Dec. 31, 2020
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Entity Registrant Name	BARCLAYS PLC
Entity Central Index Key	0000312069
Current Fiscal Year End Date	--12-31
Entity Well Known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Document Transition Report	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock Shares Outstanding	17,359,296,032
Entity Voluntary Filers	No
Entity Interactive Data Current	Yes
Entity Address Address Line 1	1 CHURCHILL PLACE
Entity Address, Country	GB
Entity Address City Or Town	LONDON
Entity Address Postal Zip Code	E14 5HP
Document Registration Statement	false
Document Annual Report	true
Entity File Number	1-09246
Entity Incorporation State Country Code	X0
Document Accounting Standard	International Financial Reporting Standards
ICFR Auditor Attestation Flag	true
Title of 12(b) Security	American Depositary Shares, each representing four 25p ordinary shares
Trading Symbol	BCS
Security Exchange Name	NYSE
Document Shell Company Report	false

Cover II

Cover II	12 Months Ended
	Dec. 31, 2020
Entity Listings [Line Items]
Contact Personnel Name	GARTH WRIGHT
Entity Address Address Line 1	1 CHURCHILL PLACE
Entity Address Postal Zip Code	E14 5HP
Entity Address City Or Town	LONDON
Entity Address, Country	GB
Business Contact [Member]
Entity Listings [Line Items]
Contact Personnel Name	GARTH WRIGHT
Entity Address Address Line 1	1 CHURCHILL PLACE
Entity Address Postal Zip Code	E14 5HP
Entity Address City Or Town	LONDON
Entity Address, Country	GB
City Area Code	+44 (0)20
Local Phone Number	7116 3170

Consolidated Income Statement

Consolidated Income Statement - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019		Dec. 31, 2018
Profit (loss) [abstract]
Interest and similar income	£ 11,892	£ 15,456		£ 14,541
Interest and similar expense	(3,770)	(6,049)		(5,479)
Net interest income	8,122	9,407		9,062
Fee and commission income	8,641	9,122		8,893
Fee and commission expenses	(2,070)	(2,362)		(2,084)
Net fee and commission income	6,571	6,760		6,809
Net trading income	7,029	4,235		4,566
Net investment income	13	1,131		585
Other income	31	99		114
Total income	21,766	21,632		21,136
Credit impairment charges	(4,838)	(1,912)		(1,468)
Net operating income	16,928	19,720		19,668
Staff costs	(8,097)	(8,315)		(8,629)
Infrastructure costs	(3,323)	(2,970)		(2,950)
Administration and general expenses	(2,313)	(2,300)		(2,457)
Litigation and conduct	(153)	(1,849)		(2,207)
Total operating expenses	(13,886)	(15,434)		(16,243)
Share of post-tax results of associates and joint ventures	6	61		69
Profit on disposal of subsidiaries, associates and joint ventures	17	10		0
(Loss)/profit before tax	3,065	4,357	[1]	3,494	[1]
Taxation	(604)	(1,003)		(911)
(Loss)/profit after tax	2,461	3,354		2,583
Attributable to:
Equity holders of the parent	1,526	2,461		1,597
Other equity instrument holders	857	813		752
Total equity holders of the parent	2,383	3,274		2,349
Non-controlling interests	78	80		234
(Loss)/profit after tax	£ 2,461	£ 3,354		£ 2,583
Earnings per share
Basic earnings per ordinary share	£ 0.088	£ 0.143		£ 0.094
Diluted earnings per share	£ 0.086	£ 0.141		£ 0.092
[1]	2019 and 2018 comparative figures have been restated to make the cash flow statement more relevant following a review of the disclosure and the accounting policies applied. Amendments have been made to the classification of cash collateral reported within cash and cash equivalents and to the presentation of items within net cash flows from operating and investing activities. Footnotes b and c below quantify the impact of the changes to the respective cash flow categories in prior periods and provide further detail .

Consolidated statement of compr

Consolidated statement of comprehensive income - GBP (£) £ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of comprehensive income
Profit/(loss) after tax		£ 2,461	£ 3,354	£ 2,583
Currency translation reserve
Currency translation differences	[1]	(473)	(544)	834
Fair value through other comprehensive income reserve movements relating to debt securities
Net gains from changes in fair value		2,902	2,901	(553)
Net gains/(losses) transferred to net profit on disposal		(295)	(502)	48
Net losses due to impairment		2	1	4
Net (gains)/losses due to fair value hedging		(2,000)	(2,172)	236
Other movements		0	(5)	(26)
Tax		(155)	(57)	65
Cash flow hedging reserve
Net gains/(losses) from changes in fair value		1,299	724	(344)
Net gains transferred to net profit		(510)	(277)	(332)
Tax		(216)	(105)	175
Other		5	16	30
Other comprehensive income/(loss) that may be recycled to profit or loss		559	(20)	137
Other comprehensive income/(loss) not recycled to profit or loss
Retirement benefit remeasurements		(80)	(280)	412
Fair value through other comprehensive income reserve movements relating to equity instruments		(262)	(95)	(260)
Own credit		(810)	(316)	77
Tax		198	150	(118)
Other comprehensive income/(loss) not recycled to profit or loss		(954)	(541)	111
Other comprehensive income/(loss) for the year		(395)	(561)	248
Total comprehensive income for the year		2,066	2,793	2,831
Attributable to:
Equity holders of the parent		1,988	2,713	2,597
Non-controlling interests		78	80	234
Total comprehensive income for the year		£ 2,066	£ 2,793	£ 2,831
[1]	Includes £ 17 m gain ( 2019 : £ 15 m gain ; 2018 : £ 41 m loss ) on recycling of currency translation differences.

Consolidated statement of com_2

Consolidated statement of comprehensive income (Parenthetical) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of comprehensive income
Gain (loss) on recycling of currency translation differences	£ (17)	£ (15)	£ 41

Consolidated balance sheet

Consolidated balance sheet - GBP (£) £ in Millions	Dec. 31, 2020	Dec. 31, 2019
Assets
Cash and balances at central banks	£ 191,127	£ 150,258
Cash collateral and settlement balances	101,367	83,256
Loans and advances at amortised cost	342,632	339,115
Reverse repurchase agreements and other similar secured lending	9,031	3,379
Trading portfolio assets	127,950	114,195
Financial assets at fair value through the income statement	175,151	133,086
Derivative financial instruments	302,446	229,236
Financial assets at fair value through other comprehensive income	78,688	65,750
Investments in associates and joint ventures	781	721
Goodwill and intangible assets	7,948	8,119
Property, plant and equipment	4,036	4,215
Current tax assets	477	412
Deferred tax assets	3,444	3,290
Retirement benefit assets	1,814	2,108
Other assets	2,622	3,089
Total Assets	1,349,514	1,140,229
Liabilities
Deposits at amortised cost	481,036	415,787
Cash collateral and settlement balances	85,423	67,341
Repurchase agreements and other similar secured borrowing	14,174	14,517
Debt securities in issue	75,796	76,369
Subordinated liabilities	16,341	18,156
Trading portfolio liabilities	47,405	36,916
Financial liabilities designated at fair value	249,765	204,326
Derivative financial instruments	300,775	229,204
Current tax liabilities	645	313
Deferred tax liabilities	15	23
Retirement benefit liabilities	291	348
Other liabilities	8,662	8,505
Provisions	2,304	2,764
Total liabilities	1,282,632	1,074,569
Equity
Called up share capital and share premium	4,637	4,594
Other equity instruments	11,172	10,871
Other reserves	4,461	4,760
Retained earnings	45,527	44,204
Total equity excluding non-controlling interests	65,797	64,429
Non-controlling interests	1,085	1,231
Total equity	66,882	65,660
Total liabilities and equity	£ 1,349,514	£ 1,140,229

Consolidated statement of chang

Consolidated statement of changes in equity - GBP (£) £ in Millions	Total		Total equity excluding non-controlling interests [member]	Called up share capital and share premium [member]	Other equity instruments [member]	Other reserves [member]	Retained earnings [member]	Non-controlling interests [member]
Beginning Balance, equity at Dec. 31, 2017	£ 63,866		£ 61,755	£ 22,045	£ 8,941	£ 5,247	£ 25,522	£ 2,111
Profit after tax	2,583		2,349	0	752	0	1,597	234
Currency translation movements	834	[1]	834	0	0	834	0	0
Fair value through other comprehensive income reserve	(486)		(486)	0	0	(486)	0	0
Cash flow hedges	(501)		(501)	0	0	(501)	0	0
Retirement benefit remeasurements	313		313	0	0	0	313	0
Own credit reserve	58		58	0	0	58	0	0
Other	30		30	0	0	0	30	0
Total comprehensive income for the year	2,831		2,597	0	752	(95)	1,940	234
Issue of new ordinary shares	88		88	88	0	0	0	0
Employee share schemes and hedges thereof	500		500	51	0	0	449	0
Capital reorganisation	0		0	(17,873)	0	0	17,873
Issue and exchange of other equity instruments	384		384	0	692	0	(308)	0
Other equity instruments coupons paid	(752)		(752)	0	(752)	0	0	0
Redemption of preference shares, value	(2,041)		(732)	0	0	0	(732)	(1,309)
Debt to equity reclassification	419		0	0	0	0	0	419
Increase in treasury shares	(267)		(267)	0	0	(267)	0	0
Vesting of shares under employee share schemes	(267)		(267)	0	0	(267)	0	0
Dividends paid	(231)		(231)	0	0	268	(499)	0
Other reserve movements	(16)		(18)	0	(1)	0	(17)	2
Ending Balance, equity at Dec. 31, 2018	63,779		62,556	4,311	9,632	5,153	43,460	1,223
Profit after tax	3,354		3,274	0	813	0	2,461	80
Currency translation movements	(544)	[1]	(544)	0	0	(544)	0	0
Fair value through other comprehensive income reserve	71		71	0	0	71	0	0
Cash flow hedges	342		342	0	0	342	0	0
Retirement benefit remeasurements	(194)		(194)	0	0	0	(194)	0
Own credit reserve	(252)		(252)	0	0	(252)	0	0
Other	16		16	0	0	0	16	0
Total comprehensive income for the year	2,793		2,713	0	813	(383)	2,283	80
Issue of new ordinary shares	182		182	182	0	0	0	0
Employee share schemes and hedges thereof	579		579	101	0	0	478	0
Issue and exchange of other equity instruments	832		832	0	1,238	0	(406)	0
Other equity instruments coupons paid	(813)		(813)	0	(813)	0	0	0
Increase in treasury shares	(224)		(224)	0	0	(224)	0	0
Vesting of shares under employee share schemes	(190)		(190)	0	0	214	(404)	0
Dividends paid	(1,281)		(1,201)	0	0	0	(1,201)	(80)
Other reserve movements	3		(5)	0	1	0	(6)	8
Ending Balance, equity at Dec. 31, 2019	65,660		64,429	4,594	10,871	4,760	44,204	1,231
Profit after tax	2,461		2,383	0	857	0	1,526	78
Currency translation movements	(473)	[1]	(473)	0	0	(473)	0	0
Fair value through other comprehensive income reserve	192		192	0	0	192	0	0
Cash flow hedges	573		573	0	0	573	0	0
Retirement benefit remeasurements	(111)		(111)	0	0	0	(111)	0
Own credit reserve	(581)		(581)	0	0	(581)	0	0
Other	5		5	0	0	0	5	0
Total comprehensive income for the year	2,066		1,988	0	857	(289)	1,420	78
Employee share schemes and hedges thereof	346		346	43	0	0	303	0
Issue and exchange of other equity instruments	98		256	0	311	0	(55)	(158)
Other equity instruments coupons paid	(857)		(857)	0	(857)	0	0	0
Increase in treasury shares	(207)		(207)	0	0	(207)	0	0
Vesting of shares under employee share schemes	(150)		(150)	0	0	197	(347)	0
Dividends paid	(79)		0	0	0	0	0	(79)
Other reserve movements	5		(8)	0	(10)	0	2	13
Ending Balance, equity at Dec. 31, 2020	£ 66,882		£ 65,797	£ 4,637	£ 11,172	£ 4,461	£ 45,527	£ 1,085
[1]	Includes £ 17 m gain ( 2019 : £ 15 m gain ; 2018 : £ 41 m loss ) on recycling of currency translation differences.

Consolidated cash flow statemen

Consolidated cash flow statement - GBP (£) £ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019		Dec. 31, 2018
Reconciliation of profit before tax to net cash flows from operating activities:
Profit before tax		£ 3,065	£ 4,357	[1]	£ 3,494	[1]
Adjustment for non-cash items:
Credit impairment charges		4,838	1,912	[1]	1,468	[1]
Depreciation, amortisation and impairment of property, plant, equipment and intangibles		1,734	1,520	[1]	1,261	[1]
Other provisions, including pensions		1,365	2,336	[1]	2,594	[1]
Net loss on disposal of investments and property, plant and equipment		47	7	[1]	28	[1]
Other non-cash movements including exchange rate movements	[2]	(2,977)	(280)	[1]	(4,488)	[1]
Changes in operating assets and liabilities:
Net decrease/(increase) in cash collateral and settlement balances	[3]	4,321	(6,436)	[1]	680	[1]
Net increase in loans and advances to banks and customers	[2]	(4,365)	(2,255)	[1]	(11,049)	[1]
Net increase in reverse repurchase agreements and other similar lending		(5,652)	(1,071)	[1]	(1,711)	[1]
Net increase in deposits		65,249	20,949	[1]	14,996	[1]
Net (decrease)/increase in debt securities in issue		(6,309)	(9,911)	[1]	8,972	[1]
Net (increase)/decrease in repurchase agreements and other similar borrowing		(343)	(4,061)	[1]	3,525	[1]
Net (increase)/decrease in derivative financial instruments		(1,845)	2,863	[1]	(3,571)	[1]
Net (increase)/decrease in trading assets		(13,755)	(10,008)	[1]	9,958	[1]
Net increase/(decrease) in trading liabilities		10,489	(966)	[1]	531	[1]
Net decrease/(increase) in financial assets and liabilities at fair value through the income statement		3,374	4,054	[1]	(12,686)	[1]
Net decrease/(increase) in other assets		452	(412)	[1]	489	[1]
Net decrease in other liabilities		(1,500)	(2,872)	[1]	(4,755)	[1]
Corporate income tax paid		(683)	(228)	[1]	(548)	[1]
Net cash from operating activities		57,505	(502)	[1]	9,188	[1]
Net cash from investing activities
Purchase of debt securities at amortised cost	[2]	(14,671)	(14,729)	[1]	(4,539)	[1]
Proceeds from sale or redemption of debt securities at amortised cost	[2]	8,480	3,590	[1]	5,109	[1]
Purchase of financial assets through other comprehensive income		(91,744)	(92,365)	[1]	(106,669)	[1]
Proceeds from sale or redemption of financial assets through other comprehensive income		80,895	81,202	[1]	107,539	[1]
Purchase of property, plant and equipment and intangibles		(1,324)	(1,793)	[1]	(1,402)	[1]
Proceeds from sale of property, plant and equipment and intangibles		0	46	[1]	18	[1]
Other cash flows associated with investing activities		(12)	84	[1]	1,191	[1]
Net cash from investing activities		(18,376)	(23,965)	[1]	1,247	[1]
Net cash from financing activities
Dividends paid and other coupon payments on equity instruments		(936)	(1,912)	[1]	(1,658)	[1]
Issuance of subordinated debt		1,438	1,352	[1]	221	[1]
Redemption of subordinated debt		(3,258)	(3,248)	[1]	(3,246)	[1]
Issue of shares and other equity instruments		1,165	3,582	[1]	1,964	[1]
Repurchase of shares and other equity instruments		(1,056)	(2,668)	[1]	(3,582)	[1]
Issuance of debt securities	[4]	0	3,994	[1]	5,736	[1]
Net purchase of treasury shares		357	410	[1]	486	[1]
Net cash from financing activities		2,732	690	[1]	(6,787)	[1]
Effect of exchange rates on cash and cash equivalents		1,668	(3,347)	[1]	4,160	[1]
Net increase/(decrease) in cash and cash equivalents		43,529	(27,124)	[1]	7,808	[1]
Cash and cash equivalents at beginning of the year	[1]	166,613	193,737		185,929
Cash and cash equivalents at end of the year		210,142	166,613	[1]	193,737	[1]
Cash and cash equivalents comprise:
Cash and cash equivalents		£ 210,142	£ 166,613	[1]	£ 185,929	[1]
[1]	2019 and 2018 comparative figures have been restated to make the cash flow statement more relevant following a review of the disclosure and the accounting policies applied. Amendments have been made to the classification of cash collateral reported within cash and cash equivalents and to the presentation of items within net cash flows from operating and investing activities. Footnotes b and c below quantify the impact of the changes to the respective cash flow categories in prior periods and provide further detail .
[2]	Movements in cash and cash equivalents relating to debt securities at amortised cost were previously shown within loans and advances to banks and customers in operating activities. These debt securities holdings are now considered to be part of the investing activi ty performed by the Group following a change in accounting policy and have been presented within investing activities in 2020. Comparatives have been restated. The effect of this change was to reclassify £ 11,139 m of net cash outflows from operating activit ies to investing activities in 20 19 and inflows of £ 570 m in 2018 .
[3]	‘Cash collateral balances with central banks with original maturity less than three months’ was previously labelled ‘Cash collateral and settlement balances with banks with original maturity less than three months’. This line it em has been restated to include only balances that the Group holds at central banks related to payment schemes. Previously, cash collateral and settlement balances with non-central bank counterparties were also classified as cash equivalents and included w ithin this balance. Comparatives have been restated. The effect of this change decreased cash and cash equivalents by £ 16,774 m as at 31 December 2019, £ 17,429 m as at 31 December 2018 and £ 18,683 as at 31 December 2017. As a result, net cash from operating activities increased by £655m in 2019 and £1,254m in 2018 representing the net decrease/(increase) in the cash collateral and settlement bala nces line item in those periods .
[4]	Issuance 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.

Consolidated cash flow statem_2

Consolidated cash flow statement (Parenthetical) - GBP (£) £ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Disclosure of voluntary change in accounting policy [line items]
Decrease in cash and cash equivalents	[1]	£ 27,124	£ (7,808)
Increase (decrease) in cash and cash equivalents from operating activities	[1]	502	(9,188)
Increase (decrease) in cash and cash equivalents from investing activities	[1]	23,965	(1,247)
Net decrease/(increase) in cash collateral and settlement balances	[1],[2]	(6,436)	680
Increase (decrease) due to voluntary changes in accounting policy [member]
Disclosure of voluntary change in accounting policy [line items]
Decrease in cash and cash equivalents		16,774	17,429	£ 18,683
Increase (decrease) in cash and cash equivalents from operating activities		11,139	(570)
Increase (decrease) in cash and cash equivalents from investing activities		11,139	(570)
Net decrease/(increase) in cash collateral and settlement balances		£ 655	£ 1,254
[1]	2019 and 2018 comparative figures have been restated to make the cash flow statement more relevant following a review of the disclosure and the accounting policies applied. Amendments have been made to the classification of cash collateral reported within cash and cash equivalents and to the presentation of items within net cash flows from operating and investing activities. Footnotes b and c below quantify the impact of the changes to the respective cash flow categories in prior periods and provide further detail .
[2]	‘Cash collateral balances with central banks with original maturity less than three months’ was previously labelled ‘Cash collateral and settlement balances with banks with original maturity less than three months’. This line it em has been restated to include only balances that the Group holds at central banks related to payment schemes. Previously, cash collateral and settlement balances with non-central bank counterparties were also classified as cash equivalents and included w ithin this balance. Comparatives have been restated. The effect of this change decreased cash and cash equivalents by £ 16,774 m as at 31 December 2019, £ 17,429 m as at 31 December 2018 and £ 18,683 as at 31 December 2017. As a result, net cash from operating activities increased by £655m in 2019 and £1,254m in 2018 representing the net decrease/(increase) in the cash collateral and settlement bala nces line item in those periods .

Financial statements of Barclay

Financial statements of Barclays PLC, Parent company accounts - Statement of comprehensive income - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019		Dec. 31, 2018
Condensed Statement of Income Captions [Line Items]
Dividend received from subsidiaries	£ 37	£ 76		£ 91
Net interest (expense)/income	8,122	9,407		9,062
Other income	31	99		114
Credit impairment charges	(4,838)	(1,912)		(1,468)
Operating expenses	(13,886)	(15,434)		(16,243)
(Loss)/profit before tax	3,065	4,357	[1]	3,494	[1]
Taxation	(604)	(1,003)		(911)
(Loss)/profit after tax	2,461	3,354		2,583
Other comprehensive income/(oss)	(395)	(561)		248
Total comprehensive income for the year	2,066	2,793		2,831
(Loss)/profit after tax attributable to:
Ordinary equity holders	1,526	2,461		1,597
Other equity instrument holders	857	813		752
(Loss)/profit after tax	2,461	3,354		2,583
Total comprehensive (loss)/income attributable to:
Equity holders of the parent	1,988	2,713		2,597
Other equity instrument holders	78	80		234
Total comprehensive (loss)/income	2,066	2,793		2,831
Barclays PLC [member]
Condensed Statement of Income Captions [Line Items]
Dividend received from subsidiaries	763	1,560		15,360
Net interest (expense)/income	(175)	214		(101)
Other income	1,192	1,760		923
Credit impairment charges	(2,573)	0		0
Operating expenses	(241)	(267)		(312)
(Loss)/profit before tax	(1,034)	3,267		15,870
Taxation	16	(86)		79
(Loss)/profit after tax	(1,018)	3,181		15,949
Other comprehensive income/(oss)	0	0		0
Total comprehensive income for the year	(1,018)	3,181		15,949
(Loss)/profit after tax attributable to:
Ordinary equity holders	(1,875)	2,368		15,197
Other equity instrument holders	857	813		752
(Loss)/profit after tax	(1,018)	3,181		15,949
Total comprehensive (loss)/income attributable to:
Equity holders of the parent	(1,875)	2,368		15,197
Other equity instrument holders	857	813		752
Total comprehensive (loss)/income	£ (1,018)	£ 3,181		£ 15,949
[1]	2019 and 2018 comparative figures have been restated to make the cash flow statement more relevant following a review of the disclosure and the accounting policies applied. Amendments have been made to the classification of cash collateral reported within cash and cash equivalents and to the presentation of items within net cash flows from operating and investing activities. Footnotes b and c below quantify the impact of the changes to the respective cash flow categories in prior periods and provide further detail .

Financial statements of Barcl_2

Financial statements of Barclays PLC, Parent company accounts - Statement of comprehensive income (Parenthetical) £ in Millions	12 Months Ended
	Dec. 31, 2020GBP (£)Employees	Dec. 31, 2019GBP (£)Employees	Dec. 31, 2018GBP (£)Employees
Condensed Statement of Income Captions [Line Items]
Loss after ax	£ (2,461)	£ (3,354)	£ (2,583)
Total comprehensive loss	£ (2,066)	£ (2,793)	£ (2,831)
Number of employees (full time equivalent) | Employees	83,000	80,800	83,500
Barclays PLC [member]
Condensed Statement of Income Captions [Line Items]
Loss after ax	£ 1,018	£ (3,181)	£ (15,949)
Total comprehensive loss	£ 1,018	£ (3,181)	£ (15,949)
Number of employees (full time equivalent) | Employees	60	79

Financial statements of Barcl_3

Financial statements of Barclays PLC, Parent company accounts - Balance sheet - GBP (£) £ in Millions	Dec. 31, 2020	Dec. 31, 2019
Assets
Loans and advances to subsidiaries	£ 342,632	£ 339,115
Financial assets at fair value through the income statement	175,151	133,086
Derivative financial instruments	302,446	229,236
Other assets	2,622	3,089
Total Assets	1,349,514	1,140,229
Liabilities
Deposits at amortised cost	481,036	415,787
Subordinated liabilities	16,341	18,156
Debt securities in issue	75,796	76,369
Financial liabilities designated at fair value	249,765	204,326
Other liabilities	8,662	8,505
Total liabilities	1,282,632	1,074,569
Equity
Other equity instruments	11,172	10,871
Other reserves	4,461	4,760
Retained earnings	45,527	44,204
Total equity	66,882	65,660
Total liabilities and equity	1,349,514	1,140,229
Barclays PLC [member]
Assets
Investments in subsidiaries	58,886	59,546
Loans and advances to subsidiaries	24,710	28,850
Financial assets at fair value through the income statement	17,521	10,348
Derivative financial instruments	7	58
Other assets	65	2
Total Assets	101,189	98,804
Liabilities
Deposits at amortised cost	482	500
Subordinated liabilities	7,724	7,656
Debt securities in issue	28,428	30,564
Financial liabilities designated at fair value	9,507	3,498
Other liabilities	176	119
Total liabilities	46,317	42,337
Equity
Called up share capital	4,340	4,331
Share premium account	297	263
Other equity instruments	11,169	10,865
Other reserves	394	394
Retained earnings	38,672	40,614
Total equity	54,872	56,467
Total liabilities and equity	£ 101,189	£ 98,804

Financial statements of Barcl_4

Financial statements of Barclays PLC, Parent company accounts - Statement of changes in equity - GBP (£) £ in Millions	Total	Equity attributable to owners of parent [member]	Called up share capital and share premium [member]	Other equity instruments [member]	Other reserves [member]	Retained earnings [member]	Barclays PLC [member]	Barclays PLC [member]Called up share capital and share premium [member]	Barclays PLC [member]Other equity instruments [member]	Barclays PLC [member]Other reserves [member]	Barclays PLC [member]Retained earnings [member]
Beginning Balance, equity at Dec. 31, 2017	£ 63,866	£ 61,755	£ 22,045	£ 8,941	£ 5,247	£ 25,522	£ 39,216	£ 22,045	£ 8,943	£ 394	£ 7,834
Comprehensive income	2,831	2,597	0	752	(95)	1,940	15,949	0	752	0	15,197
Issue of new ordinary shares	88	88	88	0	0	0	88	88	0	0	0
Issue of shares under employee share schemes	500	500	51	0	0	449	75	51	0	0	24
Issue and exchange of other equity instruments	384	384	0	692	0	(308)	384	0	692	0	(308)
Vesting of shares under employee share schemes	(267)	(267)	0	0	(267)	0	(23)	0	0	0	(23)
Dividends paid	(231)	(231)	0	0	268	(499)	(768)	0	0	0	(768)
Other equity instruments coupons paid	(752)	(752)	0	(752)	0	0	(752)	0	(752)	0	0
Capital reorganisation	0	0	(17,873)	0	0	17,873	0	(17,873)	0	0	17,873
Ending Balance, equity at Dec. 31, 2018	63,779	62,556	4,311	9,632	5,153	43,460	54,180	4,311	9,633	394	39,842
Comprehensive income	2,793	2,713	0	813	(383)	2,283	3,181	0	813	0	2,368
Issue of new ordinary shares	182	182	182	0	0	0	182	182	0	0	0
Issue of shares under employee share schemes	579	579	101	0	0	478	121	101	0	0	20
Issue and exchange of other equity instruments	832	832	0	1,238	0	(406)	836	0	1,232	0	(396)
Vesting of shares under employee share schemes	(190)	(190)	0	0	214	(404)	(19)	0	0	0	(19)
Dividends paid	(1,281)	(1,201)	0	0	0	(1,201)	(1,201)	0	0	0	(1,201)
Other equity instruments coupons paid	(813)	(813)	0	(813)	0	0	(813)	0	(813)	0	0
Ending Balance, equity at Dec. 31, 2019	65,660	64,429	4,594	10,871	4,760	44,204	56,467	4,594	10,865	394	40,614
Comprehensive income	2,066	1,988	0	857	(289)	1,420	(1,018)	0	857	0	(1,875)
Issue of new ordinary shares							0	0	0	0	0
Issue of shares under employee share schemes	346	346	43	0	0	303	63	43	0	0	20
Issue and exchange of other equity instruments	98	256	0	311	0	(55)	231	0	304	0	(73)
Vesting of shares under employee share schemes	(150)	(150)	0	0	197	(347)	(14)	0	0	0	(14)
Dividends paid	(79)	0	0	0	0	0	0	0	0	0	0
Other equity instruments coupons paid	(857)	(857)	0	(857)	0	0	(857)	0	(857)	0	0
Ending Balance, equity at Dec. 31, 2020	£ 66,882	£ 65,797	£ 4,637	£ 11,172	£ 4,461	£ 45,527	£ 54,872	£ 4,637	£ 11,169	£ 394	£ 38,672

Financial statements of Barcl_5

Financial statements of Barclays PLC, Parent company accounts - Cash flow statement - GBP (£) £ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019		Dec. 31, 2018
Reconciliation of profit before tax to net cash flows from operating activities:
(Loss)/profit before tax		£ 3,065	£ 4,357	[1]	£ 3,494	[1]
Impairment of subsidiary		4,838	1,912	[1]	1,468	[1]
Other non-cash items	[2]	(2,977)	(280)	[1]	(4,488)	[1]
Net cash generated from operating activities		57,505	(502)	[1]	9,188	[1]
Net cash used in investing activities		(18,376)	(23,965)	[1]	1,247	[1]
Cash flows from financing activities
Issue of shares and other equity instruments		1,165	3,582	[1]	1,964	[1]
Redemption of other equity instruments		(1,056)	(2,668)	[1]	(3,582)	[1]
Proceeds of borrowings and issuance of subordinated debt		1,438	1,352	[1]	221	[1]
Coupons paid on other equity instruments		(12)	84	[1]	1,191	[1]
Net cash generated from financing activities		2,732	690	[1]	(6,787)	[1]
Net increase in cash and cash equivalents		43,529	(27,124)	[1]	7,808	[1]
Cash and cash equivalents at beginning of the year	[1]	166,613	193,737		185,929
Cash and cash equivalents at end of the year		210,142	166,613	[1]	193,737	[1]
Barclays PLC [member]
Reconciliation of profit before tax to net cash flows from operating activities:
(Loss)/profit before tax		(1,034)	3,267		15,870
Dividends in specie		0	0		(14,294)
Other non-cash items		528	(582)		653
Changes in operating assets and liabilities		0	87		55
Net cash generated from operating activities		2,067	2,772		2,284
Capital contribution to and investment in subsidiary		(393)	(1,187)		(2,680)
Net cash used in investing activities		(393)	(1,187)		(2,680)
Cash flows from financing activities
Issue of shares and other equity instruments		1,175	3,597		1,953
Redemption of other equity instruments		(898)	(2,668)		(1,532)
Net increase in loans and advances to subsidiaries of the Parent		4,732	4,464		7,767
Net increase in debt securities in issue		3,720	2,588		9,174
Proceeds of borrowings and issuance of subordinated debt		158	1,194		0
Dividends paid		0	(1,019)		(680)
Coupons paid on other equity instruments		(857)	(813)		(752)
Net cash generated from financing activities		(1,434)	(1,585)		396
Net increase in cash and cash equivalents		240	0		0
Cash and cash equivalents at beginning of the year		0	0		0
Cash and cash equivalents at end of the year		240	0		0
Net cash generated from operating activities includes:
Dividends received		763	1,560		1,066
Interest (paid)/received		£ (175)	£ 214		£ (101)
[1]	2019 and 2018 comparative figures have been restated to make the cash flow statement more relevant following a review of the disclosure and the accounting policies applied. Amendments have been made to the classification of cash collateral reported within cash and cash equivalents and to the presentation of items within net cash flows from operating and investing activities. Footnotes b and c below quantify the impact of the changes to the respective cash flow categories in prior periods and provide further detail .
[2]	Movements in cash and cash equivalents relating to debt securities at amortised cost were previously shown within loans and advances to banks and customers in operating activities. These debt securities holdings are now considered to be part of the investing activi ty performed by the Group following a change in accounting policy and have been presented within investing activities in 2020. Comparatives have been restated. The effect of this change was to reclassify £ 11,139 m of net cash outflows from operating activit ies to investing activities in 20 19 and inflows of £ 570 m in 2018 .

Consolidated balance sheet (Nar

Consolidated balance sheet (Narrative)	12 Months Ended
	Dec. 31, 2020
Balance sheet
Disclosure of authorisation of financial statements	The Board of Directors approved the financial statements on pages 211 to 302 on 17 February 20 21 . Nigel Higgins Group Chairman James E Staley Group Chief Executive Tushar Morzaria Group Finance Director

Consolidated cash flow statem_3

Consolidated cash flow statement (Narrative)	12 Months Ended
	Dec. 31, 2020
Cash flow statement
Disclosure of additional information about understanding financial position and liquidity of entity	Interest received was £ 18,748 m ( 2019 : £ 34,061 m; 2018 : £ 26,254 m) and interest paid was £ 9,577 m ( 2019 : £ 23,186 m; 2018 : £ 16,124 m). The Group is required to maintain balances with central banks and other regulatory authorities and these amounted to £ 3,392 m ( 2019 : £ 4 ,893 m; 2018 : £ 4,717 m). For the purposes of the cash flow statement, cash comprises cash on hand and demand deposits and cash equivalents comprise highly liquid investments that are convertible into cash with an insignificant risk of changes in value with original maturities of three months or less. Repurchase and reverse repurchase agreements are not considered to be part of cash equivalents.

Financial statements of Barcl_6

Financial statements of Barclays PLC - Statement of comprehensive income (Narrative)	12 Months Ended
	Dec. 31, 2020
Barclays PLC [member]
Condensed Statement of Income Captions [Line Items]
Disclosure of general information about financial statements	For the year ended 31 December 2020 , loss after tax was £ 1,018 m ( 2019 : profit £ 3,181 m) and total comprehensive loss was £ 1,018 m ( 2019 : income £ 3,181 m). The Company has 60 members of staff ( 2019 : 79 ).

Financial statements of Barcl_7

Financial statements of Barclays PLC - Balance sheet (Narrative)	12 Months Ended
	Dec. 31, 2020
Condensed Balance Sheet Statements, Captions [Line Items]
Disclosure of authorisation of financial statements	The Board of Directors approved the financial statements on pages 211 to 302 on 17 February 20 21 . Nigel Higgins Group Chairman James E Staley Group Chief Executive Tushar Morzaria Group Finance Director
Barclays PLC [member]
Condensed Balance Sheet Statements, Captions [Line Items]
Disclosure of authorisation of financial statements	The financial statements on pages 217 to 219 and the accompanying note on pages 301 to 302 were approved by the Board of Directors on 17 February 20 21 and signed on its behalf by: Nigel Higgins James E Staley Tushar Morzaria Group Chairman Group Chief Executive Group Finance Director

Financial statements of Barcl_8

Financial statements of Barclays PLC - Cash flow statement (Narrative)	12 Months Ended
	Dec. 31, 2020
Condensed Cash Flow Statements, Captions [Line Items]
Disclosure of additional information about understanding financial position and liquidity of entity	Interest received was £ 18,748 m ( 2019 : £ 34,061 m; 2018 : £ 26,254 m) and interest paid was £ 9,577 m ( 2019 : £ 23,186 m; 2018 : £ 16,124 m). The Group is required to maintain balances with central banks and other regulatory authorities and these amounted to £ 3,392 m ( 2019 : £ 4 ,893 m; 2018 : £ 4,717 m). For the purposes of the cash flow statement, cash comprises cash on hand and demand deposits and cash equivalents comprise highly liquid investments that are convertible into cash with an insignificant risk of changes in value with original maturities of three months or less. Repurchase and reverse repurchase agreements are not considered to be part of cash equivalents.
Barclays PLC [member]
Condensed Cash Flow Statements, Captions [Line Items]
Disclosure of additional information about understanding financial position and liquidity of entity	The Parent company’s principal activity is to hold the investment in its wholly-owned subsidiaries, Barclays Ba nk PLC, Barclays Bank UK PLC, Barclays Execution Services Limited and Barclays Principal Investments Limited . Dividends received are treated as operating income.

Significant accounting policies

Significant accounting policies	12 Months Ended
	Dec. 31, 2020
1. Significant accounting policies
Significant accounting policies	1. Reporting entity These financial statements are prepared for Barclays PLC and its subsidiaries (the Group ) under Section 399 of the Companies Act 2006. The Group is a major global financial services provider engaged in retail banking, credit cards, wholesale banking, investment banking, wealth management and investment management services. In addition, separate financial statements have been presented for the holding company. 2. Compliance with International Financial Reporting Standards The consolidated financial statements of the Group , and the separate financial statements of Barclays PLC , have been 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 interp retations (IFRICs) as issued by the IASB and adopted pursuant to Regulation (EC) No 1606/2002 as it applies in the European Union. These standards have also been endorsed by the UK . The principal accounting policies applied in the preparation of the consolidated and separate financial statements are set out below, and in the relevant notes to the financi al statements. These policies have been consistently applied with the exception of the early adoption of Interest Rate Benchmark Reform – Phase 2 (A mendments to IFRS 9, IAS 39 , IFRS 7 , IFRS 4 and IFRS16) which w as applied from 1 January 20 20 . 3. Basis of preparation The consolidated and separate financial statements have been prepared under the historical cost convention modified to include the fair valuation of investment property, and particular financial instruments, to the extent required or permitted under IFRS as set out in the relevant accounting policies. They are stated in millions of pounds Sterling (£m), the functional currency of Barclays PLC . The financial statements have been prepared on a going concern basis, in accordance with the Companies Act 2006 as applicable to companies using IFRS. The financial statements are prepared on a going concern basis, as the Board is satisfied that the Group and the parent company have the resources to continue in business for a period of at least 12 months fr om approval of the financial statements. In making this assessment, the Board has 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 t o 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 assessment is based upon business plans which contain future projections of profitability taken from t he Group’s three year medium-term plan as well as projections of regulatory capital requirements and business funding needs. The WCR also includes an assessment of the impact of internally generated stress testing scenarios on the liquidity and capital req uirement forecasts. The stress tests used were based upon an assessment of reasonably possible downside economic scenarios that the Group could experience. The WCR showed that the Group had sufficient capital in place to support its future business requi rements and remained above its regulatory minimum requirements in the stress scenarios. Accordingly, the Directors concluded that there was a reasonable expectation that the Group and parent company has adequate resources to continue as a Going Concern for a period of at least 12 months from the date of approval of the financial statements . 4. Accounting policies The Group prepares financial statements in accordance with IFRS. The Group ’s significant accounting policies relating to specific finan cial statement items, together with a description of the accounting estimates and judgements that were critical to preparing them, are set out under the relevant notes. Accounting policies that affect the financial statements as a whole are set out below. (i) Consolidation The Group applies IFRS 10 Consolidated financial statements . The consolidated financial statements combine the financial statements of Barclays PLC and all its subsidiaries. Subsidiaries are entities over which Barclays PLC has control. The Group has control over another entity when the Group has all of the following: 1) power over the relevant activities of the investee, for example through voting or other rights 2) exposure to, or rights to, variable returns from it s involvement with the investee, and 3) the ability to affect those returns through its power over the investee. The assessment of control is based on the consideration of all facts and circumstances. The Group reassesses whether it controls an inves tee if facts and circumstances indicate that there are changes to one or more of the three elements of control. Intra-group transactions and balances are eliminated on consolidation. Consistent accounting policies are used throughout the Group for th e purposes of the consolidation. Changes in ownership interests in subsidiaries are accounted for as equity transactions if they occur after control has already been obtained and they do not result in loss of control. As the consolidated financial statem ents include partnerships where the Group member is a partner, advantage has been taken of the exemption under Regulation 7 of the Partnership (Accounts) Regulations 2008 with regard to preparing and filing of individual partnership financial statemen ts. Details of the principal subsidiaries are given in Note 34 . (ii) Foreign currency translation The Group applies IAS 21 The Effects of Changes in Foreign Exchange Rates . Transactions in foreign currencies are translated into Sterlin g at the rate ruling on the date of the transaction. Foreign currency monetary balances are translated into Sterling at the period end exchange rates. Exchange gains and losses on such balances are taken to the income statement. Non-monetary foreign curre ncy balances in relation to items measured in terms of historical cost are carried at historical transaction date exchange rates. Non-monetary foreign currency balances in relation to items measured at fair value are translated using the exchange rate at t he date when the fair value was measured. The Group ’s foreign operations (including subsidiaries, joint ventures, associates and branches) based mainly outside the UK may have different functional currencies. The functional currency of an operation is the currency of the main economy to which it is exposed. Prior to consolidation (or equity accounting) the assets and liabilities of non-Sterling operations are translated at the period end exchange rate and items of income, expense and other comprehensive income are translated into Sterling at the rate on the date of the transactions. Exchange differences arising on the translation of foreign operations are included in currency translation reserves within equity. These are transferred to the income statement when the Group disposes of the e ntire interest in a foreign operation, when partial disposal results in the loss of control of an interest in a subsidiary, when an investment previously accounted for using the equity method is accounted for as a financial asset, or on the disposal of an autonomous foreign operation within a branch. (iii) Financial assets and liabilities The Group applies IFRS 9 Financial Instruments to the recognition, classification and measurement, and derecognition of financial assets and financial liabilities an d the impairment of financial assets. T he Group applies the requirements of IAS 39 Financial Instruments: Recognition and Measurement for hedge accounting purposes. Recognition The Group recognises financial assets and liabilities when it becom es a party to the terms of the contract. Trade date or settlement date accounting is applied depending on the classification of the financial asset. Classification and measurement Financial assets are classified on the basis of two criteria: i) the business model within which financial assets are managed, and ii) their contractual cash flow characteristics (whether the cash flows represent ‘solely payments of principal and interest’ (SPPI)). The Group assesses the business model criteri a at a portfolio level. Information that is considered in determining the applicable business model includes (i) policies and objectives for the relevant portfolio, (ii) how the performance and risks of the portfolio are managed, evaluated and reported to management, and (iii) the frequency, volume and timing of sales in prior periods, sales expectation for future periods, and the reasons for such sales. The contractual cash flow characteristics of financial assets are assessed with reference to whether th e cash flows represent SPPI. In assessing whether contractual cash flows are SPPI compliant, interest is defined as consideration primarily for the time value of money and the credit risk of the principal outstanding. The time value of money is defined as the element of interest that provides consideration only for the passage of time and not consideration for other risks or costs associated with holding the financial asset. Terms that could change the contractual cash flows so that it would not meet the co ndition for SPPI are considered, including: (i) contingent and leverage features, (ii) non-recourse arrangements and (iii) features that could modify the time value of money. Financial assets are measured at amortised cost if they are held within a busine ss model whose objective is to hold financial assets in order to collect contractual cash flows, and their contractual cash flows represent SPPI. Financial assets are measured at fair value through other comprehensive income if they are held within a busi ness model whose objective is achieved by both collecting contractual cash flows and selling financial assets, and their contractual cash flows represent SPPI. Other financial assets are measured at fair value through profit and loss. There is an option t o make an irrevocable election on initial recognition for non traded equity investments to be measured at fair value through other comprehensive income, in which case dividends are recognised in profit or loss, but gains or losses are not reclassified to p rofit or loss upon derecognition, and the impairment requirements of IFRS 9 do not apply. The accounting policy for each type of financial asset or liability is included within the relevant note for the item. The Group ’s policies for determining the fair values of the assets and liabilities are set out in Note 17 . Derecognition The Group derecognises a financial asset, or a portion of a financial asset, from its balance sheet where the contractual rights to cash flows from the asset have expired, or have been transferred, usually by sale, and with them either substantially all the risks and rewards of the asset or significant risks and rewards, along with the unconditional ability to sell or pledge the asset. Financial liabilities ar e de-recognised when the liability has been settled, has expired or has been extinguished. An exchange of an existing financial liability for a new liability with the same lender on substantially different terms – generally a difference of 10% or more in t he present value of the cash flows or a substantive qualitative amendment – is accounted for as an extinguishment of the original financial liability and the recognition of a new financial liability. Transactions in which the Group transfers assets a nd liabilities, portions of them, or financial risks associated with them can be complex and it may not be obvious whether substantially all of the risks and rewards have been transferred. It is often necessary to perform a quantitative analysis. Such an a nalysis compares the Group ’s exposure to variability in asset cash flows before the transfer with its retained exposure after the transfer. A cash flo w analysis of this nature may require judgement. In particular, it is necessary to estimate the asset’s expected future cash flows as well as potential variability around this expectation. The method of estimating expected future cash flows depends on the nature of the asset, with market and market-implied data used to the greatest extent possible. The potential variability around this expectation is typically determined by stressing underlying parameters to create reasonable alternative upside and downside scenarios. Probabilities are then assigned to each scenario. Stressed parameters may include default rates, loss severity, or prepayment rates . Notes to the financial statements For the year ended 31 December 2020 Notes to the financial statements For the year ended 31 December 2020 = PAGE 1 \* Arabic \* MERGEFORMAT 1 Barclays PLC 2020 Annual Report on Form 20-F = PAGE 3 \* Arabic \* MERGEFORMAT 3 Barclays PLC 2020 Annual Report on Form 20-F Accounting for reverse repurchase and repurchase agreements including other similar lending and borrowing Reverse repurchase agreements (and stock borrowing or similar transaction) are a form of secured lending whereby the Group provides a loan or cash collateral in exchange for the transfer of collateral, generally in the form of marketable securities subject to an agreement to transfer the securities back at a fixed price in the future. Repurchase agreements are where the Group obtains such loans or cash collateral, in exchange for the transfer of col lateral. The Group purchases (a reverse repurchase agreement) or borrows securities subject to a commitment to resell or return them. The securities are not included in the balance sheet as the Group does not acquire the risks and rewards of ownership. Consideration paid (or cash collateral provided) is accounted for as a loan asset at amortised cost, unless it is designated or mandatorily at fair value through profit and loss. The Group may also sell (a repurchase agreement) or lend se curities subject to a commitment to repurchase or redeem them. The securities are retained on the balance sheet as the Group retains substantially all the risks and rewards of ownership. Consideration received (or cash collateral provided) is accounte d for as a financial liability at amortised cost, unless it is designated at fair value through profit and loss. (iv) Issued debt and equity instruments The Group applies IAS 32, Financial Instruments: Presentation , to determine whether funding is ei ther a financial liability (debt) or equity. Issued financial instruments or their components are classified as liabilities if the contractual arrangement results in the Group having an obligation to either deliver cash or another financial asset, or a variable number of equity shares, to the holder of the instrument. If this is not the case, the instrument is generally an equity instrument and the proceeds included in equity, net of transaction costs. Dividends and other returns to equity holders are recognised when paid or declared by the members at the AGM and treated as a deduction from equity. Where issued financial instruments contain both liability and equity components, these are accounted for separately. The fair value of the debt is estimate d first and the balance of the proceeds is included within equity. 5. New and amended standards and interpretations The accounting policies adopted are consistent with those of the previous financial year, with the exception of the early adoption of Inte rest Rate Benchmark Reform – Phase 2 (A mendments to IFRS 9, IAS 39 , IFRS 7, IFRS 4 and IFRS 16) which was applied from 1 January 20 20 . IFRS 9, IAS 39, IFRS 7, IFRS 4 and IFRS 16 – Amendments relating to Interest Rate Benchmark Reform (Phase 2 amendments) IFRS 9, IAS 39, IFRS 7, IFRS 4 and IFRS 16 were amended in August 2020, which are effective for periods beginning on or after 1 January 2021 with earlier adoption permitted. The Group elected to early adopt the amendments with effect from 1 January 2020 . T he amendments have been endorsed by the EU and by the UK. IFRS 9 allows companies when they first apply IFRS 9, to make an accounting policy choice to continue to apply the hedge accounting requirements of IAS 39. The Group made the election to continue t o apply the IAS 39 hedge accounting requirements, and consequently, the amendments to IAS 39 in respect of hedge accounting have been adopted by the Group. The objective of the amendments is to provide certain reliefs to companies when changes are made t o the contractual cash flows or hedging relationships resulting from interest rate benchmark reform. The reliefs adopted by the Group have been described below. Changes in the basis for determining contractual cash flows A change in the basis of determini ng the contractual cash flows of a financial instrument that are required by the reform is accounted for by updating the effective interest rate, without the recognition of an immediate gain or loss. This practical expedient is only applied where (1) the c hange to the contractual cash flows is necessary as a direct consequence of the reform and (2) the new basis for determining the contractual cash flows is economically equivalent to the previous basis. For changes made in addition to those required by the reform, the practical expedient is applied first, after which the normal IFRS 9 requirements for modifications of financial instruments is applied. Hedge accounting The IAS 39 requirements in respect of hedge accounting have been amended in two phases. Th e Phase 1 amendments, which were adopted by the Group in 2019, provide relief to the hedge accounting requirements prior to changing a hedge relationship due to the interest rate benchmark reform (refer to Note 14 ). The Phase 2 amendments prov ide relief when changes are made to hedge relationships as a result of the interest rate benchmark reform. The Phase 2 amendments adopted by the Group are described below.  Under a temporary exception, changes to the hedge designation and hedge documentatio n due to the interest rate benchmark reform would not constitute the discontinuation of the hedge relationship nor the designation of a new hedging relationship.  In respect of the retrospective hedge effectiveness assessment, the Group may elect on a hedge -by-hedge basis to reset the cumulative fair value changes to zero when the exception to the retrospective assessment ends (Phase 1 relief). Any hedge ineffectiveness will continue to be measured and recognised in full in profit or loss.  Amounts accumulated in the cash flow hedge reserve would be deemed to be based on the alternative benchmark rate (on which the hedge future cash flows are determined) when there is a change in basis for determining the contractual cash flows.  For hedges of groups of items (such as those forming part of a macro cash flow hedging strategy), the amendments provide relief for items within a designated group of items that are amended for changes directly required by the reform.  In respect of whether a risk component of a hedged item is separately identifiable, the amendments provide temporary relief to entities to meet this requirement when an alternative risk free rate (RFR) financial instrument is designated as a risk component. These amendments allow entities upon des ignation of the hedge to assume that the separately identifiable requirement is met if the entity reasonably expects the RFR risk will become separately identifiable within the next 24 months. This relief applies to each RFR on a rate-by-rate basis and sta rts when the entity first designates the RFR as a non-contractually specified risk component. Notes to the financial statements For the year ended 31 December 2020 Notes to the financial statements For the year ended 31 December 2020 = PAGE 1 \* Arabic \* MERGEFORMAT 1 Barclays PLC 2020 Annual Report on Form 20-F = PAGE 4 \* Arabic \* MERGEFORMAT 4 Barclays PLC 2020 Annual Report on Form 20-F The amendments to IFRS 7 require certain disclosures to be made to enable users of financial statements to understand the effect of interest rate benchmark reform on an entity’s financial instruments and risk management strategy. Refer to Note 41 where these disclosures have been included. Future accounting developments The following accounting standards have been issued by the IASB but are not yet effective: IFRS 17 – Insurance contracts In May 2017, the IASB issued IFRS 17 Insurance Contracts , a comprehensive new accounting standard for insurance contracts covering recognition and m easurement, presentation and disclosure. Once effective, IFRS 17 will replace IFRS 4 Insurance Contracts that was issued in 2005. IFRS 17 applies to all types of insurance contracts (i.e. life, non-life, direct insurance and re-insurance), regardless of t he type of entities that issue them, as well as to certain guarantees and financial instruments with discretionary participation features. A few scope exceptions will apply. In June 2020, the IASB published amendments to IFRS 17. The amendments that are relevant to the Group are the scope exclusion for credit card contracts and similar contracts that provide insurance coverage, the optional scope exclusion for loan contracts that transfer significant insurance risk, and the clarification that only fi nancial guarantees issued are in scope of IFRS 9. The amendments also defer the effective date of IFRS 17, including the above amendments, to annual reporting periods beginning on or after 1 January 2023. IFRS 17, including the amendmen ts to IFRS 17, has not yet been endorsed by the EU as of the date that the financial statements are authorised for issue. Following the UK’s withdrawal from the EU on 31 December 2020, the UK-adopted international accounting standards will be applicable. IFRS 17, including the amendments to IFRS 17, has not yet been endorsed by the UK. The Group is currently assessing the expected impact of adopting this standard. 6. Critical accounting estimates and judgements The preparation of financial statement s in accordance with IFRS requires the use of estimates. It also requires management to exercise judgement in applying the accounting policies. The key areas involving a higher degree of judgement or complexity or areas where assumptions are significant to the consolidated and individual financial statements are highlighted under the relevant note. Critical accounting estimates and judgements are disclosed in:  Credit impairment charges on page [00]  Tax on page [00]  Fair value of financial instruments on pa ge [00]  Goodwill and intangible assets on page [00]  Pensions and post-retirement benefits – obligations on page [00]  Provisions including conduct and legal, competition and regulatory matters on page [00]. 7. Other disclosures To improve transparency and ease of reference, by concentrating related information in one place, certain disclosures required under IFRS have been included within the Risk review section as follows:  Credit risk on pages [00] to [00] and [00] to [00]  Market risk on pages [00] to [00 ] and [00] to [00]  Treasury and capital risk – liquidity on pages [00] and [00] to [00]  Treasury and capital risk – capital on pages [00] and [00] to [00] . These disclosures are covered by the Audit opinion (included on pages [00] to [00] ) where referenced as audited. 8. Parent company accounts The Parent Company’s f inancial statements on pages 217 to 219 also form part of the notes to the consolidated financial statements.

Segmental reporting

Segmental reporting	12 Months Ended
	Dec. 31, 2020
2. Segmental reporting
Segmental reporting	2 Segment al r eporting Presentation of segmental reporting The Group ’s segmental reporting is in accordance with IFRS 8 Operating Segments . Operating segments are reported in a manner consistent with the internal reporting provided to the Executive Committee, which is responsible for allocating resources and assessing performance of the operating segments, and has been identified as the chief operating decision maker. All transactions between business segments are conducted on an arm’s- length basis, with intra-segment revenue and costs being eliminated in Head Office. Income and expenses directly associated with each segment are included in determining business segment performance. The Group is a British universal bank diversified by business, geography and income type, serving consumer and wholesale customers and clients globally and for segmental reporting purposes it defines its two operating divisions as Barclays UK and Barclays International.  Barclays UK comprises our UK Personal Banking, UK Business Banking and Barclaycard Consumer UK businesses. These businesses are carried on by our UK ring-fenced bank (Barclays Bank UK PLC) and certain other entities within the Group .  Barclays International comprises our Corporate and Investment Bank and Consumer, Cards and Payments businesses. These businesses are carried on by our non ring-fenced bank (Barclays Bank PLC) and its subsidiaries, as well as by certain other entitie s within the Group. The below table also includes Head Office which comprises head office, Barclays Execution Services FTE and legacy businesses Analysis of results by business Barclays UK Barclays International Head Office Group results £m £m £m £m For the year ended 31 December 2020 Total income 6,347 15,921 (502) 21,766 Credit impairment charges (1,467) (3,280) (91) (4,838) Net operating income/(expenses) 4,880 12,641 (593) 16,928 Operating costs (4,270) (8,765) (399) (13,434) UK bank levy (50) (240) (9) (299) Litigation and conduct (32) (48) (73) (153) Total operating expenses (4,352) (9,053) (481) (13,886) Other net income/(expenses) a 18 28 (23) 23 Profit/(loss) before tax 546 3,616 (1,097) 3,065 Total assets (£bn) 289.1 1,041.8 18.6 1,349.5 Number of employees (full time equivalent) 21,300 10,800 50,900 83,000 Average number of employees (full time equivalent) 81,800 Note a 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. On 1 April 2020, assets of £ 2.2 bn relating to the Barclays Partner Finance business were moved from Barclays International to Barclays UK, with net operating income of £ 19 m and loss before tax of £ 5 m subsequently recognised in Barclays UK for the rest of 2020. The 2019 and 2018 comparative figures have not been restated. Barclays UK Barclays International Head Office Group results £m £m £m £m For the year ended 31 December 2019 Total income 7,353 14,675 (396) 21,632 Credit impairment charges (712) (1,173) (27) (1,912) Net operating income/(expenses) 6,641 13,502 (423) 19,720 Operating costs (3,996) (9,163) (200) (13,359) UK bank levy (41) (174) (11) (226) Litigation and conduct (1,582) (116) (151) (1,849) Total operating expenses (5,619) (9,453) (362) (15,434) Other net income a - 69 2 71 Profit/(loss) before tax 1,022 4,118 (783) 4,357 Total assets (£bn) 257.8 861.4 21.0 1,140.2 Number of employees (full time equivalent) 21,400 11,200 48,200 80,800 Average number of employees (full time equivalent) 82,700 Note a 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. Analysis of results by business Barclays UK Barclays International Head Office Group results £m £m £m £m For the year ended 31 December 2018 Total income 7,383 14,026 (273) 21,136 Credit impairment (charges)/releases (826) (658) 16 (1,468) Net operating income/(expenses) 6,557 13,368 (257) 19,668 Operating costs (4,075) (9,324) (228) (13,627) UK bank levy (46) (210) (13) (269) GMP charge - - (140) (140) Litigation and conduct (483) (127) (1,597) (2,207) Total operating expenses (4,604) (9,661) (1,978) (16,243) Other net income/(expenses) a 3 68 (2) 69 Profit/(loss) before tax 1,956 3,775 (2,237) 3,494 Total assets (£bn) 249.7 862.1 21.5 1,133.3 Number of employees (full time equivalent) 22,600 12,400 48,500 83,500 Note a 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. Income by geographic region a 2020 2019 2018 For the year ended 31 December £m £m £m United Kingdom 11,211 11,809 11,529 Europe 2,059 1,754 1,617 Americas 7,425 7,064 7,058 Africa and Middle East 36 59 43 Asia 1,035 946 889 Total 21,766 21,632 21,136 Income from individual countries which represent more than 5% of total income a 2020 2019 2018 For the year ended 31 December £m £m £m United Kingdom 11,211 11,809 11,529 United States 7,318 6,939 6,911 Note a The geographical analysis is based on the location of the office wh ere the transactions are record ed .

Net interest income

Net interest income	12 Months Ended
	Dec. 31, 2020
3. Net interest income
Net interest income	3 Net interest income Accounting for interest income and expenses Interest income on loans and advances at amortised cost and financial assets at fair value through other comprehensive income , and interest expense on financial liabilities held at amortised cost, are calculated using the effective interest method which allocates interest, and direct and incremental fees and costs, over the expected lives of the assets and liabilities. The effective interest method requires the Group to estimate future cash flows, in some cases based on its experience of cust omers’ behaviour, considering all contractual terms of the financial instrument, as well as the expected lives of the assets and liabilities. The Group incurs certain costs to originate credit card balances with the most significant being co-brand p artner fees. To the extent these costs are attributed to customers that continuously carry an outstanding balance (revolvers) and incremental to the origination of credit card balances , they are capitalised and subsequently included within the calculation of the effective interest rate. They are amortised to inter est income over the period of expected repayment of the originated balance. Costs attributed to customers that settle their outstanding balances each period ( transactors ) are deferred on the balance sheet as a cost of obtaining a contract and amortised to fee and commission expense over the life of the customer relationship (refer to Note 4 ). There are no other individual estimates involved in the calculation of effective interest rates that are material to the results or financial position 2020 2019 a 2018 a £m £m £m Cash and balances at central banks 275 1,091 1,123 Loans and advances at amortised cost 10,180 12,450 12,073 Fair value through other comprehensive income 776 1,032 1,029 Negative interest on liabilities 68 13 35 Other 593 870 281 Interest and similar income 11,892 15,456 14,541 Deposits at amortised cost (1,030) (2,449) (2,250) Debt securities in issue b (1,360) (1,906) (1,677) Subordinated liabilities (670) (1,068) (1,223) Negative interest on assets (344) (278) (270) Other (366) (348) (59) Interest and similar expense (3,770) (6,049) (5,479) Net interest income 8,122 9,407 9,062 Note s a Comparatives for negative interest income on liabilities and negative interest expense on assets have been re - presented from Other interest income and Other interest expense. b Barclays has amended the presentation of the premium paid for purchased financial guarantees which are embedded in notes it issues directly to the market. From 20 20 onwards, the full note coupon (£ 99 m) is presented as interest expense within net interest income. The financial guarantee element of the coupon had previ ously been recognised in net investment income (2019: £ 25 m; 2018: £ 1 m). The comparatives have not been restated. Interest and similar income presented above represents interest revenue calculated using the effective interest method. Costs to originate credit card balances o f £ 698 m ( 2019 : £ 6 9 7 m; 2018 : £ 596 m) have been amortised to interest and similar income during the year. Interest and similar income include s £ 40 m ( 2019 : £ 48 m; 2018 : £ 53 m) accrued on impaired loans . Other interest expense includes £ 70 m ( 2019 : £ 76 m ) relating to IFRS 16 lease interest expenses.

Net fee and commission income

Net fee and commission income	12 Months Ended
	Dec. 31, 2020
4. Net Fee and commission income
Net fee and commission income	4 Net fee and commission income Accounting for net fee and commission income The Group applies IFRS 15 Revenue from Contracts with Customers. IFRS 15 establishes a five-step model governing revenue recognition. The five-step model requires the Group to (i) identify the contract with the customer, (ii) identify each of the performance obligations included in the contract, (iii) determine the amount of consideration in the contract, (iv) allocate the consideration to each of the identified performance obligations and (v) recognise revenue as each performance obligation is satisfied. The Group recognises fee and commission income charged for services provided by the Group as the ser vices are provided, for example, on comp letion of the underlying transaction . Where the contractual arrangements also result in the Group recognising financial instruments in scope of IFRS 9, such financial instruments are initially recognised at fair value in accordance with IFRS 9 before applying the provisions of IFRS 1 5 . Fee and commission income is disaggregated below by fee types that reflect the nature of the services offered across the Group and operating segments , in accordance with IFRS 15. The below table includes a total for fees in scope of IFRS 15. Refer to Note 2 for more detailed information about operating segments. 2020 Barclays UK Barclays International Head Office Total £m £m £m £m Fee type Transactional 810 2,353 - 3,163 Advisory 159 693 2 854 Brokerage and execution 212 1,173 - 1,385 Underwriting and syndication - 2,867 - 2,867 Other 71 173 9 253 Total revenue from contracts with customers 1,252 7,259 11 8,522 Other non-contract fee income - 119 - 119 Fee and commission income 1,252 7,378 11 8,641 Fee and commission expense (308) (1,754) (8) (2,070) Net fee and commission income 944 5,624 3 6,571 2019 Barclays UK Barclays International Head Office Total £m £m £m £m Fee type Transactional 1,074 2,809 - 3,883 Advisory 177 903 - 1,080 Brokerage and execution 208 1,131 - 1,339 Underwriting and syndication - 2,358 - 2,358 Other 92 242 12 346 Total revenue from contracts with customers 1,551 7,443 12 9,006 Other non-contract fee income - 116 - 116 Fee and commission income 1,551 7,559 12 9,122 Fee and commission expense (365) (1,990) (7) (2,362) Net fee and commission income 1,186 5,569 5 6,760 2018 Barclays UK Barclays International Head Office Total £m £m £m £m Fee type Transactional 1,102 2,614 - 3,716 Advisory 209 850 - 1,059 Brokerage and execution 153 1,073 - 1,226 Underwriting and syndication - 2,462 - 2,462 Other 78 207 27 312 Total revenue from contracts with customers 1,542 7,206 27 8,775 Other non-contract fee income - 118 - 118 Fee and commission income 1,542 7,324 27 8,893 Fee and commission expense (360) (1,707) (17) (2,084) Net fee and commission income 1,182 5,617 10 6,809 Fee types Transactional Transactional fees are service charges on deposit accounts, cash management services and transactional proces sing fees. These include interchange and merchant fee income generated from credit and bank card usage. Transaction and processing fees are recognised at the point in time the transaction occurs or service is performed. Interchange and me rchant fees are recognised upon settlement of the card transaction payment. The Group incurs certain card related costs including those related to car dholder reward programmes and payments to co-brand partners. C ardholder reward programmes costs related to customers that settle their outstanding balance each p eriod (transactors) are expensed when incurred and presented in fee and commission expense while costs relate d to customers that continuously carry an outstanding balance (revolvers) are included in the effective interest rate of the receivable (refer to N o te 3 ). Payments to partners for new car dholder account originations related to transactor accounts are deferred as costs to obtain a contract under IFRS 15, w hile costs related to revolver accounts are included in the effective interest rate o f the receivable (refer to Note 3 ). Those costs deferre d under IFRS 15 are capitalised and amortised over the estimated life of the customer relationship. Payments to co-brand partners based on revenue shari ng are presented as a reduction of fee and comm ission income while payments based on profitability are presented in fee and commission expense. Advisory Advisory fees are generated from wealth management services and investment banking advisory services relat ed to mergers, acquisitions and financial r estructurings. Wealth management advisory fees are earned over the period the services are provided and are generally recognised quarterly when the market value of client assets is determined. Investment banking advisory fees are recognised at the point in time when the services related to the transaction have been completed under the terms of the engagement. Investment banking advisory costs are recognised as incurred in fee and commission expense if direct and incremental to the advisory services or are otherwise recognised in operating expenses. Brokerage and execution Brokerage and execution fees are earned for executing client transactions with various exchanges and over-th e-counter markets and assisting clients in clearing transactions. Brokerage and execution fees are recognised at the point in time the associated s ervice has been completed which is generally the trade date of the transaction. Underwriting and syndication Underwriting and syndication fees are earned for the distribution of client eq uity or debt securities and the arrangement and administration of a loan syndication. This includes commitment fees to provide loan financing. Underwriting fees are generally rec ognised on trade date if there is no remaining contingency, such as the transa ction being conditional on the closing of an acquisition or an other tran saction. Underwriting costs are deferred and recognised in fee and commission expense when the associated underwriting fees are recorded. Syndication fees are earned for arranging and administering a loan syndication; however, the associated fee may be subject to variability until the loan has been syndicated to other syndicate members or until other contingencies have been resolved and therefore the fee revenue is deferred until the un certainty is resolved. Included in t he underwriting and syndication fees are loan commitment fees which are not presented as part of the carrying value of the loan in accordance with IFRS 9 . Such commitment fees are recognised over time through to the contractual maturity of the commitment. Contract assets and contract liabilities The Group had no material contract assets or contract liabilities as at 31 December 2020 ( 2019 : nil ; 2018 : nil ) . Impairment of fee receivables and contract assets During 2020 , there have been no material impairments recognised in relation to fees receivable and contract assets ( 2019 : nil ; 2018 : nil ) . Fees in relation to transactional business can be added to outstanding customer balances. These amounts may be subsequently impaired as part of the overall loans and advances balance. Remaining performance obligations The Group applies the practical expedient of IFRS 15 and does not disclose information about remaining performance obligations that have original expected durations of one year or less or because the Group has a right to consideration that corresponds directly with the value of the service provided to the client or customer . Costs incurred in obtaining or fulfilling a contract The Group expects that incremental costs of obtaining a contract such as success fee and commission fees paid are recoverable and therefore capitalised such cont ract costs in the amount of £ 141 m at 31 December 2020 ( 2019 : £ 159 m; 2018 : £ 125 m) . Capitalised contract costs are amortised based on the transfer of services to which the asset relates which typically ranges over the expected life of the relationship. In 2020 , th e amount of amor tisation was £ 36 m ( 2019 : £ 30 m; 2018 : £ 30 m) and there was no impairment loss recognised in connection with the capitalised contract costs ( 2019 : nil ; 2018 : nil ) .

Net trading income

Net trading income	12 Months Ended
	Dec. 31, 2020
5. Net trading income
Net trading income	5 Net trading income Accounting for net trading income In accordance with IFRS 9, trading positions are held at fair value, and the resulting gains and losses are included in the income statement, together with interest and dividends arising from long and short positions and funding costs relating to trading activities. Income arises from both the sale and purchase of trading positions, margins which are achieved through market making and customer business and from changes in fair value caus ed by movements in interest and exchange rates, equity prices and other market variables. Gains or losses on non-trading financial instruments designated or mandatorily at fair value with changes in fair value recognised in the income statement are includ ed in net trading income where the business model is to manage assets and liabilities on a fair value basis which includes use of derivatives or where an instrument is designated at fair value to eliminate an accounting mismatch and the related instrument' s gain and losses are reported in trading income. 2020 2019 2018 £m £m £m Net gains from financial instruments held for trading 5,342 2,941 3,292 Net gains from financial instruments designated at fair value 700 256 267 Net gains from financial instruments mandatorily at fair value 987 1,038 1,007 Net trading income 7,029 4,235 4,566

Net investment income

Net investment income	12 Months Ended
	Dec. 31, 2020
6. Net investment income
Net investment income	6 Net investment income Accounting for net investment income Dividends are recognised when the right to receive the dividend has been established. Other accounting policies relating to net investment income are set out in Note 13 and Note 15 . 2020 2019 2018 £m £m £m Net (losses)/gains from financial instruments mandatorily at fair value (50) 510 226 Net gains from disposal of debt instruments at fair value through other comprehensive income 295 502 158 Net (losses)/gains from disposal of financial assets and liabilities measured at amortised cost a (61) 257 38 Dividend income 37 76 91 Net (losses)/gains on other investments b (208) (214) 72 Net investment income 13 1,131 585 Notes a Included within the 2020 balance are losses of £ 115 m relating to the partial redemption of contingent capital notes. Included within the 2019 balance are gains of £ 170 m relating to the sale of debt securities as part of the Group’s Treasury operations. b Barclays has amended the presentation of the premium paid for purchased financial guarantees which are embedded in notes it issues directly to the market. From 2020 onwards, the full note coupon is presented as interest expense within net interest income. The financial guarantee element of the coupon had previously been recognised in net investment incom e. The reclassification into interest expense is £ 99 m for 2020 (2019: £ 25 m, 2018: £ 1 m) . The comparatives have not been restated.

Credit impairment charges

Credit impairment charges	12 Months Ended
	Dec. 31, 2020
7. Credit impairment charges
Credit impairment charges	7 Credit impairment charges Accounting for the impairment of financial assets Impairment In accordance with IFRS 9, t he Group is required to recognise expected credit losses (ECLs) based on unbiased forward-looking information for all financial assets at amortised cost, lease receivables, debt financial assets at fair value through other comprehensive income, loan commitments and financial guarantee con tracts. At the reporting date, an allowance (or provision for loan commitments and financial guarantees) is required for the 12 month (Stage 1) ECLs. If the credit risk has significantly increased since initial recognition (Stage 2), or if the financial instrument is credit impaired (Stage 3), an allowance (or provision) should be recognised for the lifetime ECLs. The measurement of ECL is calculated using three main components: (i) probability of default (PD) (ii) loss given default (LGD) and (iii) the exposure at default (EAD). The 12 month and lifetime ECLs are calculated by multiplying the respective PD, LGD and the EAD. The 12 month and lifetime PDs represent the PD occurring over the next 12 months and the remaining maturity of the instrument re spectively. The EAD represents the expected balance at default, taking into account the repayment of principal and interest from the balance sheet date to the default event together with any expected drawdowns of committed facilities. The LGD represents ex pected losses on the EAD given the event of default, taking into account, among other attributes, the mitigating effect of collateral value at the time it is expected to be realised and the time value of money. Determining a significant increase in cred it risk since initial recognition: The Group assesses when a significant increase in credit risk has occurred based on quantitative and qualitative assessments. The credit risk of an exposure is considered to have significantly increased when: i) Quant itative test The annualised lifetime PD has increased by more than an agreed threshold relative to the equivalent at origination. PD deterioration thresholds are defined as percentage increases, and are set at an origination score band and segment level t o ensure the test appropriately captures significant increases in credit risk at all risk levels. Generally, thresholds are inversely correlated to the origination PD, i.e. as the origination PD increases, the threshold value reduces. The assessment of the point at which a PD increase is deemed ‘significant’, is based upon analysis of the portfolio ’ s risk profile against a common set of principles and performance metrics (consistent across both retail and wholesale businesses), incorporating expert credi t judgement where appropriate. Application of quantitative PD floors does not represent the use o f the low credit risk exemption as exposures can separately move into Stage 2 via the qualitative route described below. Wholesale assets apply a 100% increa se in PD and 0.2% PD floor to determine a significant increase in credit risk. Retail assets apply bespoke relative increase and absolute PD thresholds based on product type and origination PD. Thresholds are subject to maximums defined by Group poli cy and typically apply minimum relative thresholds of 50-100% and a maximum relative threshold of 400%. For existing/historical exposures where origination point scores or data are no longer available or do not represent a comparable estimate of lifetime PD, a proxy origination score is defined, based upon:  back-population of the approved lifetime PD score either to origination date or, where this is not fe asible, as far back as possible (subject to a data start point no later than 1 January 2015); or  use of available historical account performance data and other customer information, to derive a comparable ‘proxy’ estimation of origination PD. ii) Qualitative test This is relevant for accounts that meet the portfolio’s ‘high risk’ criteria and are subject to closer credit monitoring. High risk customers may not be in arrears but either through an event or an observed behaviour exhibit credit distress. The definition and assessment of high risk includes as wide a range of information as reasonably available, such as industry and Group-wide customer level data, including but not limited to bureau scores and high consumer indebtedness index, wherever possible or relevant. Whilst the high risk populations applied for IFRS 9 impairment purposes are aligned with r isk management processes, they are also regularly reviewed and validated to ensure that they capture any incremental segments where there is evidence of credit deterioration. iii) Backstop criteria This is relevant for accounts that are more than 30 calendar days past due. The 30 days past due criteria is a backstop rather than a primary driver of moving exposures into Stage 2. The criteria for determining a significant increase in credit risk for assets with bullet repayments follows the same principle as al l other assets, i.e. quantitative, qualitative and backstop tests are all applied. Exposures will move back to Stage 1 once they no longer meet the criteria for a significant increase in credit risk . This means that, at a minimum all payments must be up-t o-date, the PD deterioration test is no longer met, the account is no longer classified as high risk, and the customer has evidenced an ability to maintain future payments. Exposures are only removed from Stage 3 and re-assigned to Stage 2 once the origi nal default trigger event no longer applies. Exposures being removed from Stage 3 must no longer qualify as credit impaired, and: a) the obligor will also have demonstrated consistently good payment behaviour over a 12-month period, by making all consecuti ve contractual payments due and, for forborne exposures, the relevant EBA defined probationary period has also been successfully completed or; b) (for non-forborne exposures) the performance conditions are defined and approved within an appropriately sanct ioned restructure plan, including 12 months’ payment history have been met. Management overlays and other exceptions to model outputs are applied only if consistent with the objective of identifying significant increases in credit risk. Forward-looking information The measurement of ECL involves complexity and judgement, including estimation of PD, LGD, a range of unbiased future economic scenarios, estimation of expected lives (where contractual life is not appropriate), and estimation of EAD and assess ing significant increases in credit risk. Credit losses are the expected cash shortfalls from what is contractually due over the expected life of the financial instrument, discounted at the original effective interest rate (EIR). ECLs are the unbiased pro bability-weighted credit losses determined by evaluating a range of possible outcomes and considering future economic conditions. The Group uses a five-scenario model to calculate ECL. An external consensus forecast is assembled from key sources, including HM Treasury (short and medium term forecasts), Bloomberg (based on median of economic forecasts) and the Urban Land Institute (for US House Prices), which forms the b aseline scenario. In addition, two adverse scenarios (Downside 1 and Downside 2) and two favourable scenarios (Upside 1 and Upside 2) are derived, with associated probability weightings. The adverse scenarios are calibrated to a similar severity to internal stress tests, whilst also considering IFRS 9 specific sensitivities and non-linearity. Downside 2 is benchmarked to the Bank of England’s annual cyclical scenarios and to the most severe scenario from Moody’s inventory, but is not designed to be the same. The favourable scenarios are calibrated to be symmetric to the adverse scenarios, subject to a ceiling calibrated to relevant recent favourable benchmark scenarios. The scenarios include eight economic v ariables (GDP, unemployment, House Price Index (HPI) and base rates in both the UK and US markets) and expanded variables using statistical models based on historical correlations. The upside and downside shocks are designed to evolve over a five-year stress horizon, with all five scenarios converging to a steady state after approximately eight years. The methodology for estimating prob ability weights for each of the scenarios involves a comparison of the distribution of key historic al UK and US macroeconomic variables against the forecast paths of the five scenarios. The methodology works such that the baseline (reflecting current conse nsus outlook) has the highest weight and the weights of adverse and favourable scenarios depend on the deviation from the baseline; the further from the baseline, the smaller the weight. A single set of five scenarios is used across all portfolios and all five weights are normalised to equate to 100%. The same scenarios and weights that are used in the estimation of expected credit losse s are also used for the Group internal planning purposes. The impacts across the portfolios are different because of the s ensitivities of each of the portfolios to specific macroeconomic variables, for example, mortgages are highly sensitive to house prices, and credit cards and unsecured consumer loans are highly sensitive to unemployment. Definition of default, credit impaired assets, write-offs, and interest income recognition The definition of default for the purpose of determining ECLs, and for internal credit risk management purposes, has been aligned to the Regulatory Capital CRR Article 178 definition of d efault, to maintain a consistent approach with IFRS 9 and associated regulatory guidance. The Regulatory Capital CRR Article 178 definition of default considers indicators that the debtor is unlikely to pay, includes exposures in forbearance and is no late r than when the exposure is more than 90 days past due or 180 days past due in the case of UK mortgages. When exposures are identified as credit impaired at the time when they are purchased or originated interest income is calculated on the carryin g value net of the impairment allowance. An asset is considered credit impaired when one or more events occur that have a detrimental impact on the estimated future cash flows of the financial asset. This comprises assets defined as defaulted and other in dividually assessed exposures where imminent default or actual loss is identified. Uncollectable loans are written off against the related allowance for loan impairment on completion of the Group ’s internal processes and when all reasonably expected recoverable amounts have been collected. Subsequent recoveries of amounts previously written off are credited to the income statement. The timing and extent of write-offs may involve some element of subjective judgement. Nevertheless, a write-off will ofte n be prompted by a specific event, such as the inception of insolvency proceedings or other formal recovery action, which makes it possible to establish that some or the entire advance is beyond realistic prospect of recovery. Accounting for purchased fin ancial guarantee contracts The Group may enter into a financial guarantee contract which requires the issuer of such contract to reimburse the Group for a loss it incurs because a specified debtor fails to make payment when due in accordance with the terms of a debt instrument. For these separate financial guarantee contracts, the Group recognises a reimbursement asset aligned with the recognition of the underlying ECLs, if it is considered virtually certain that a reimbursement would be rece ived if the specified debtor fails to make payment when due in accordance with the terms of the debt instrument. Loan modifications and renegotiations that are not credit-impaired When modification of a loan agreement occurs as a result of commercial rest ructuring activity rather than due to the credit risk of the borrower, an assessment must be performed to determine whether the terms of the new agreement are substantially different from the terms of the existing agreement. This assessment considers both the change in cash flows arising from the modified terms as well as the change in overall instrument risk profile. In respect of payment holidays granted to borrowers which are not due to forbearance, if the revised cash flows on a present value basis (bas ed on the original EIR) are not substantially different from the original cash flows, the loan is not considered to be substantially modified. Where terms are substantially different, the existing loan will be derecognised and a new loan will be recognised at fair value, with any difference in valuation recognised immediately within the income statement, subject to observability criteria. Where terms are not substantially different, the loan carrying value will be adjusted to reflect the present value of modified cash flows discounted at the original EIR, with any resulting gain or loss recognised immediately within the income statement as a modification gain or loss. Note 1 sets out details for changes in the basis of determining the contractua l cash flows of a financial instrument that are required by interest rate benchmark reform. Expected life Lifetime ECLs must be measured over the expected life. This is restricted to the maximum contractual life and takes into account expected prepayment, extension, call and similar options. The exceptions are certain revolver financial instruments, such as credit cards and bank overdrafts, that include both a drawn and an undrawn component where the entity’s contractual ability to demand repayment and can cel the undrawn commitment does not limit the entity’s exposure to credit losses to the contractual notice period. For revolving facilities, expected life is analytically derived to reflect the behavioural life of the asset, i.e. the full period over which the business expects to be exposed to credit risk. Behavioural life is typically based upon historical analysis of the average time to default, closure or withdrawal of facility. Where data is insufficient or analysis inconclusive, an additional ‘maturity factor’ may be incorporated to reflect the full estimated life of the exposures, based upon experienced judgement and/or peer analysis. Potential future modifications of contracts are not taken into account when determining the expected life or EAD until they occur. Discounting ECLs are discounted at the EIR at initial recognition or an approximation thereof and consistent with income recognition. For loan commitments the EIR is the rate that is expected to apply when the loan is drawn down and a financia l asset is recognised. Issued financial guarantee contracts are discounted at the risk free rate. Lease receivables are discounted at the rate implicit in the lease. For variable/floating rate financial assets, the spot rate at the reporting date is used a nd projections of changes in the variable rate over the expected life are not made to estimate future interest cash flows or for discounting. Modelling techniques ECLs are calculated by multiplying three main components, being the PD, LGD and the EAD, dis counted at the original EIR. The regulatory Basel Committee of Banking Supervisors (BCBS) ECL calculations are leveraged for IFRS 9 modelling but adjusted for key differences which include:  BCBS requires 12 month through the economic cycle losses whereas IFRS 9 requires 12 months or lifetime point in time losses based on conditions at the reporting date and multiple forecasts of the future economic conditions over the expected lives;  IFRS 9 models do not include c ertain conservative BCBS model floors and downturn assessments and require discounting to the reporting date at the original EIR rather than using the cost of capital to the date of default;  Management adjustments are made to modelled output to account for situations where known or expected risk factors and information have not been considered in the modelling process, for example forecast economic scenarios for uncertain political events; and  ECL is measured at the individual financial instrument level, ho wever a collective approach where financial instruments with similar risk characteristics are grouped together, with apportionment to individual financial instruments, is used where effects can only be seen at a collective level, for example for forward-lo oking information. For the IFRS 9 impairment assessment, the Group ’s risk models are used to determine the PD, LGD and EAD. For Stage 2 and 3, the Group applies lifetime PDs but uses 12 month PDs for Stage 1. The ECL drivers of PD, EAD and LGD a re modelled at an account level which considers vintage, among other credit factors. Also, the assessment of significant increase in credit risk is based on the initial lifetime PD curve, which accounts for the different credit risk underwritten over time. Forbearance A financial asset is subject to forbearance when it is modified due to the credit distress of the borrower. A modification made to the terms of an asset due to forbearance will typically be assessed as a non-substantial modification that does not result in derecognition of the original loan, except in circumstances where debt is exchanged for equity. Both performing and non-performing forbearance assets are classified as Stage 3 except where it is established that the concession granted has not resulted in diminished financial obligation and that no other regulatory definition of default criteria ha ve been triggered, in which case the asset is classified as Stage 2. The minimum probationary period for non-performing forbearance is 12 months a nd for performing forbearance, 24 months. Hence, a minimum of 36 months is required for non-performing forbearance to move out of a forborne state. No financial instrument in forbearance can transfer back to Stage 1 until all of the Stage 2 thresholds are no longer met and can only move out of Stage 3 when no longer credit impaired. Critical accounting estimates and judgements IFRS 9 impairment involves several important areas of judgement, including estimating forward looking modelled parameters (PD, LGD and EAD), developing a range of unbiased future economic scenarios, estimating expected lives and assessing significant increases i n credit risk, based on the Group ’s experience of managing credit risk. The determination of expected life is most material for Barclays credit card portfolios which is obtained via behavioural life analysis to materially capture the risk of these facilities. Within the retail and small businesses portfolios, which comprise large numbers of small homogenous assets with similar risk characteristics where credit scoring techniques are generally used, the impairment allowance is calculated using forward looking modelled parameters which are typically run at account level. There are many models in use, each tailored to a product, line of business or customer category. Judgement and knowledge is needed in selecting the statistical methods to use when the models are developed or revised. The impairment allowance reflected in the financial statements for these portfolios is therefore considered to be reasonable and supportable. The impairment charge reflecte d in the income statement for retail portfolios is £ 3,116 m (201 9 : £ 1 ,696 m; 201 8 : £ 1,598 m) of the total impairme nt charge on loans and advances and off balance sheet loan commitments and financial guarantee contracts . For individually significant assets in Stage 3, impairment allowances are calculated on an individual basis and all relevant considerations that have a bearing on the expected future cash flows across a range of economic scenarios are taken into account. These considerations can be particularl y subjective and can include the business prospects for the customer, the realisable value of collateral, the Group ’s position relative to other claimants, the reliability of customer information and the likely cost and duration of the work-out proces s. The level of the impairment allowance is the difference between the value of the discounted expected future cash flows (discounted at the loan’s original effective interest rate), and its carrying amount. Furthermore, judgements change with time as new information becomes available or as work-out strategies evolve, resulting in frequent revisions to the impairment allowance as individual decisions are taken. Changes in these estimates would result in a change in the allowances and have a direct impact on the impairment charge. The impairment charge reflected in the financial statements in relation to wholesale portfolios is a charge of £ 1,569 m (201 9 : £ 208 m charge ; 201 8 : £ 133 m release ) of the total impairment charge on loans and advances and off balance sheet loan commitments and financial guarantee contracts . Further information on impairment allowances, impairment charges , measurement uncertainty, sensitivity analysis and related credit information is set out within the Credit risk performance section . 2020 2019 2018 Impairment charges Recoveries and reimburse-ments a Total Impairment charges Recoveries and reimburse-ments a Total Impairment charges Recoveries and reimburse-ments a Total £m £m £m £m £m £m £m £m £m Loans and advances 4,308 (399) 3,909 1,957 (124) 1,833 1,785 (195) 1,590 Provision for undrawn contractually committed facilities and guarantees provided 776 - 776 71 - 71 (125) - (125) Loans impairment 5,084 (399) 4,685 2,028 (124) 1,904 1,660 (195) 1,465 Cash collateral and settlement balances 2 - 2 1 - 1 (1) - (1) Financial assets at fair value through other comprehensive income 2 - 2 1 - 1 4 - 4 Other financial assets measured at cost 149 - 149 6 - 6 - - - Credit impairment charges 5,237 (399) 4,838 2,036 (124) 1,912 1,663 (195) 1,468 Note a Recoveries and reimbursements includes £ 364 m for reimbursements expected to be received under the arrangement where Group has entered into financial guarantee contracts which provide credit protection over certain loans assets with third parties. Cash recoveries of previously written off amounts to £ 35 m . Write-offs subject t o enforcement activity The contractual amount outstanding on financial assets that were written off during the year and that are still subject to enforcement activity is £ 1,246 m ( 2019 : £ 1, 660 m ) . T his is lower than the write-offs presented in the movement in gross exposures and impairment allowance table due to assets sold during the year post write-offs and post write-off recoveries. Modification of financial assets Financial assets with a loss allowance measured at an amount equal to lifetime ECL of £ 4,275 m (2019 : £ 1,383 m) were subject to non-substantial modification during the year, with a resulting loss of £ 34 m (2019 : £ 22 m). The gross carrying amount of financial assets for which the loss allowance has changed to a 12 month ECL during the year amounts to £ 1,194 m (2019 : £401 m) .

Operating expenses

Operating expenses	12 Months Ended
	Dec. 31, 2020
8. Operating expenses
Operating expenses	8 Operating expenses 2020 2019 2018 £m £m £m Infrastructure costs Property and equipment 1,556 1,409 1,360 Depreciation and amortisation a 1,539 1,487 1,252 Lease payments a 34 41 329 Impairment of property, equipment and intangible assets 194 33 9 Total infrastructure costs 3,323 2,970 2,950 Administration and general expenses Consultancy, legal and professional fees 567 590 729 Marketing and advertising 330 425 495 UK bank levy 299 226 269 Other administration and general expenses 1,117 1,059 964 Total administration and general expenses 2,313 2,300 2,457 Staff costs 8,097 8,315 8,629 Provisions for litigation and conduct 153 1,849 2,207 Operating expenses 13,886 15,434 16,243 Note a Following the adoption of IFRS 16 from 1 January 2019, the depreciation charge associated with right of use assets is reported within the depreciation and amortisation charge for 2019 and 2020 . For further details on staff costs including accounting policies, refer to Note 31 .

Tax

Tax	12 Months Ended
	Dec. 31, 2020
9. Tax
Tax	9 Tax Accounting for income taxes The Group applies IAS 12 Income Taxes in accounting for taxes on income. Income tax payable on taxable profits (current tax) is recognised as an expense in the periods in which the profits arise. Withholding taxes are also treated as income taxes. Income tax recoverable on tax allowable losses is recognised as a current tax asset only to the extent that it is regarded as recoverable by offsetting against taxable profits arising in the current or prior periods. Current tax is measured using tax rates and tax laws that have been enacted or substantively enacted at the balance sheet date. Deferred tax assets are recognised to the extent that it is probable that taxable profit will be available against which the deductible temporary differences, and the carry forward of unused tax credits and unused tax losses can be utilised, except in certain circumstances where the deferred tax asset relating to the deductible temporary difference arises from the initial recog nition of an asset or liability in a transaction that is not a business combination and, at the time of the transaction, affects neither the accounting profit nor taxable profit or loss. Deferred tax is determined using tax rates and legislation enacted or substantively enacted by the balance sheet date which are expected to apply when the deferred tax asset is realised or the deferred tax liability is settled. Deferred tax assets and liabilities are only offset when there is both a legal right to set-off a nd an intention to settle on a net basis. The Group considers an uncertain tax position to exist when it considers that ultimately, in the future, the amount of profit subject to tax may be greater than the amount initially reflected in the Group ’s tax returns. The Group accounts for provisions in respect of uncertain tax positions in two different ways. A current tax provision is recognised when it is considered probable that the outcome of a review by a tax authority of an uncertain ta x position will alter the amount of cash tax due to, or from, a tax authority in the future. From recognition, the current tax provision is then measured at the amount the Group ultimately expects to pay the tax authority to resolve the position. Effe ctive from 1 January 2019, the Group changed its accounting policy on the accrual of interest and penalty amounts in respect of uncertain income tax positions and now recognises such amounts as an expense within profit before tax and will continue to do so in future periods. The prior periods’ tax charges have not been restated because the accrual for interest and penalties in those periods in respect of uncertain tax positions was not material. Deferred tax provisions are adjustments made to the ca rrying value of deferred tax assets in respect of uncertain tax positions. A deferred tax provision is recognised when it is considered probable that the outcome of a review by a tax authority of an uncertain tax position will result in a reduction in the carrying value of the deferred tax asset. From recognition of a provision, measurement of the underlying deferred tax asset is adjusted to take into account the expected impact of resolving the uncertain tax position on the loss or temporary difference giv ing rise to the deferred tax asset. The approach taken to measurement takes account of whether the uncertain tax position is a discrete position that will be reviewed by the tax authority in isolation from any other position, or one of a number of issues which are expected to be reviewed together concurrently and resolved simultaneously with a tax authority. The Group ’ s measurement of provisions is based upon its best estimate of the additional profit that will become subject to tax. For a discrete position, consideration is given only to the merits of that position. Where a number of issues are expected to be reviewed a nd resolved together, the Group will take into account not only the merits of its position in respect of each particular issue but also the overall level of provision relative to the aggregate of the uncertain tax positions across all the issues that are expected to be resolved at the same time. In addition, in assessing provision levels, it is assumed that tax authorities will review uncertain tax positions and that all facts will be fully and transparently disclosed. Critical accounting estimates a nd judgements There are two key areas of judgement that impact the reported tax position. Firstly, the level of provisioning for uncertain tax positions; and secondly, the recognition and measurement of deferred tax assets. The Group does not consid er there to be a significant risk of a material adjustment to the carrying amount of current and deferred tax balances, including provisions for uncertain tax positions in the next financial year. The provisions for uncertain tax positions cover a diverse range of issues and reflect advice from external counsel where relevant. It should be noted that only a proportion of the total uncertain tax positions will be under audit at any point in time, and could therefore be subject to challenge by a tax authori ty over the next year. Deferred tax assets have been recognised based on business profit forecasts. Details on the recog nition of deferred tax assets are provided in this note. 2020 2019 2018 £m £m £m Current tax charge/(credit) Current year 1,255 1,037 689 Adjustments in respect of prior years 31 (45) (214) 1,286 992 475 Deferred tax charge/(credit) Current year (830) 86 442 Adjustments in respect of prior years 148 (75) (6) (682) 11 436 Tax charge 604 1,003 911 The table below shows the reconciliation between the actual tax charge and the tax charge that would result from applying the standard UK corpo ration tax rate to the Group’s profit before tax. 2020 2020 2019 2019 2018 2018 £m % £m % £m % Profit before tax 3,065 4,357 3,494 Tax charge based on the standard UK corporation tax rate of 19% (2019: 19%; 2018: 19%) 582 19.0% 828 19.0% 664 19.0% Impact of profits/losses earned in territories with different statutory rates to the UK (weighted average tax rate is 25.1% (2019: 24.2%; 2018: 21.9%)) 188 6.1% 227 5.2% 100 2.9% Recurring items: Adjustments in respect of prior years 179 5.8% (120) (2.7%) (220) (6.3%) Non-creditable taxes including withholding taxes 109 3.5% 150 3.4% 156 4.5% Impact of UK bank levy being non-deductible 57 1.9% 43 1.0% 51 1.5% Non-deductible expenses 48 1.6% 45 1.0% 81 2.3% Tax adjustments in respect of share-based payments 26 0.8% (6) (0.1%) 17 0.5% Impact of Barclays Bank PLC's overseas branches being taxed both locally and in the UK 25 0.8% 15 0.3% 16 0.5% Banking surcharge and other items 6 0.2% 57 1.3% 104 2.9% Changes in recognition of deferred tax and effect of unrecognised tax losses (123) (4.0%) (82) (1.9%) (104) (3.0%) AT1 tax credit (165) (5.4%) (157) (3.6%) (148) (4.3%) Non-taxable gains and income (208) (6.8%) (260) (6.0%) (245) (7.0%) Non-recurring items: Remeasurement of UK deferred tax assets due to cancellation of rate change (118) (3.8%) - - - - Non-deductible provisions for UK customer redress (7) (0.2%) 263 6.1% 93 2.7% Non-deductible provisions for investigations and litigation 5 0.2% - - 346 9.9% Total tax charge 604 19.7% 1,003 23.0% 911 26.1% Factors driving the effective tax rate The effective tax rate of 19.7 % is higher than the UK corporation tax rate of 19 % primarily due to profits earned outside the UK being taxed at local statutory tax rates that are higher than the UK tax rate, adjustments in respect of prior years, non-creditable taxes and non-deductible expenses including UK bank levy. These factors, which have each increased the effective tax rate, are largely offset by the impact of non-taxable gains and income, tax relief on payments made under AT1 instruments , the use of unrecognised tax losses in the period and adjustments for the remeasurement of UK deferred tax assets as a result of the UK corporation tax rate being maintained at 19 %. The Group’s future tax charge will b e sensitive to the geogr aphic mix of profits earned, the tax rates in force and changes to the tax rules in the jurisdictions that the Group operates in . Tax in the consolidated statement of comprehensive income The tax relating to each component of other comprehensive income can be found in the consolidated statement of comprehensive income which includes within Other a tax credit of £ 5 m (2019: £ 16 m ) on other items including share- based payment s. Deferred tax assets and liabilities The deferred tax amounts on the balance sheet were as follows: 2020 2019 £m £m US Intermediate Holding Company Tax Group ('IHC Tax Group') 1,001 1,037 US Branch Tax Group 1,048 1,015 UK Tax Group 886 818 Other (outside the UK and US tax groups) 509 420 Deferred tax asset 3,444 3,290 Deferred tax liability (15) (23) Net deferred tax 3,429 3,267 US deferred tax assets in the IHC and US Branch Tax Groups The deferred tax asset in the IHC Tax Group of £ 1,001 m ( 2019 : £ 1,037 m) relates entirely to temporary differences and includes £ nil ( 2019 : £ 54 m) relating to tax losses and the deferred tax asset in Barclays Bank PLC’s US Branch Tax Group of £ 1,048 m ( 2019 : £ 1,015 m) also relates entirely to temporary differences and includes £ nil ( 2019 : £ 84 m) relating to tax losses. The deferred tax asset i n the IHC Tax Group of £ 1,001 m (2019: £ 1,037 m) also includes £ 330 m (2019: £ 359 m) arising from prior net operating loss conversion. Under New York State and City tax rules the amounts can be carried forward and will expire in 2034 . Business profit forecasts indicate these amounts will be fully recovered before expiry. They are includ ed within the other temporary differences category in the table below . UK Tax Group deferred tax asset The deferred tax asset in the UK Tax Group of £ 886 m ( 2019 : £ 818 m) includes £ 565 m (2019: £ 268 m) relating to tax losses , with the balance relating to temporary differences . There is no time limit on utilisation of UK tax losses and business profit forecasts indicate that these will be fully recovered. Other deferred tax assets (outside the UK and US tax groups) The deferred tax asset of £ 509 m ( 2019 : £ 420 m) in other entiti es within the Group includes £ 170 m ( 2019 : £ 117 m) relating to tax losses. These deferred tax assets relate to a number of different territories and their reco gnition is based on profit forecasts or local country law which indicate that it is probable that those deferred tax assets will be fully recovered . Of the deferred tax asset of £ 509 m ( 2019 : £ 420 m) , an amount of £ 8 m ( 2019 : £ 10 m) relates to entities which have suffered a loss in either the current or prior year and for which the utilisation of the deferred tax is dependent on future taxable profits . This has been taken into account in reaching the above conclusion that these deferred tax assets will be fully recovered in the future. The table below shows movements on deferred tax assets and liabilities during the year. The amounts are different from those disclosed on the balance sheet and in the preceding table as th ey are presented before offsetting asset and liability balances where there is a legal right to set-off and an intention to settle on a net basis. Fixed asset timing differences Fair value through other comprehensive income Cash flow hedges Retirement benefit obligations Loan impairment allowance Other provisions Share-based payments and deferred compensation Other temporary differences Tax losses carried forward Total £m £m £m £m £m £m £m £m £m £m Assets 1,338 119 - 38 501 128 344 1,458 523 4,449 Liabilities (31) (18) (181) (640) - - - (312) - (1,182) At 1 January 2020 1,307 101 (181) (602) 501 128 344 1,146 523 3,267 Income statement 129 - - 6 156 22 20 134 215 682 Other comprehensive income and reserves - (137) (377) (191) - - 5 238 - (462) Other movements (12) (2) (8) 4 9 (7) (6) (33) (3) (58) 1,424 (38) (566) (783) 666 143 363 1,485 735 3,429 Assets 1,465 - - 43 666 143 363 1,564 735 4,979 Liabilities (41) (38) (566) (826) - - - (79) - (1,550) At 31 December 2020 1,424 (38) (566) (783) 666 143 363 1,485 735 3,429 Assets 1,292 180 39 46 601 112 359 1,377 529 4,535 Liabilities (16) (35) (10) (435) - - - (262) - (758) At 1 January 2019 1,276 145 29 (389) 601 112 359 1,115 529 3,777 Income statement 51 - - (4) (49) 23 (19) (31) 18 (11) Other comprehensive income and reserves - (42) (210) (205) (40) 2 9 72 - (414) Other movements (20) (2) - (4) (11) (9) (5) (10) (24) (85) 1,307 101 (181) (602) 501 128 344 1,146 523 3,267 Assets 1,338 119 - 38 501 128 344 1,458 523 4,449 Liabilities (31) (18) (181) (640) - - - (312) - (1,182) At 31 December 2019 1,307 101 (181) (602) 501 128 344 1,146 523 3,267 Other movements include the impact of changes in foreign exchange rates as well as deferred tax amounts relating to acquisitions and disposals. The amount of deferre d tax assets expected to be recovered aft er more than 12 months is £ 4,544 m ( 2019 : £ 3,945 m). The amount of deferred tax liability expected to be settled after more than 12 mon ths is £ 1,510 m ( 2019 : £ 1,199 m). These amounts are before offsetting asset and liability balances where there is a legal right to set-off and an intention to settl e on a net basis. Unrecognised deferred tax Tax losses and temporary differences Deferred tax assets have not been recognised in respect of gross deductib le temporary differences of £ 125 m ( 2019 : £ 213 m), unused tax credits of £ 236 m ( 2019 : £ 247 m), and gross tax loss es of £ 20,913 m ( 2019 : £ 1 9,582 m). The tax losses include capital l osses of £ 3,947 m ( 2019 : £ 3,980 m). Of these tax losses, £ 139 m ( 2019 : £ 41 m ) expire within five years, £ 236 m ( 2019 : £ 239 m) exp ir e within six to 10 years, £ 7,271 m ( 2019 : £ 5,178 m) expire w ithin 11 to 20 years and £ 13,267 m ( 2019 : £ 14,124 m) can be carried forward indefinitely. Deferred tax assets have not been recognised in respect of these items because it is not probable that future taxable profits and gains wil l be available against which they can be utilised . Group investments in subsidiaries, branches and associates Deferred tax is not recognised in respect of the value of the Group's investments in subsidiaries, branches a nd associates where the Group is able to control the timing of the reversal of the temporary differences and it is probable that such differences will not reverse in the foreseeable future. The aggregate amount of these temporary differences for which deferred tax liabilities ha ve not been recognised was £ 0.8 b n ( 2019 : £ 0.7 bn) .

Earnings per share

Earnings per share	12 Months Ended
	Dec. 31, 2020
10. Earnings per share
Earnings per share	10 Earnings per share 2020 2019 2018 £m £m £m Profit attributable to ordinary equity holders of the parent 1,526 2,461 1,597 2020 2019 2018 million million million Basic weighted average number of shares in issue 17,300 17,200 17,075 Number of potential ordinary shares 368 282 308 Diluted weighted average number of shares 17,668 17,482 17,383 Basic earnings per share Diluted earnings per share 2020 2019 2018 2020 2019 2018 p p p p p p Earnings per ordinary share 8.8 14.3 9.4 8.6 14.1 9.2 The calculation of basic earnings per share is based on the profit attributable to equity holders of the parent and the basic weighted average number of shares excluding treasury shares held in employee benefit trusts or held for trading. When calculating the diluted earnings per share, the weighted average number of shares in issue is adjusted for the effects of all expected dilutive potential ordinary shares held in respect of Barclays PLC, totalling 368 m ( 2019 : 282 m) shares. The total number of share options outstanding, under schemes considered to be potentially dilutive, was 719 m ( 2019 : 533 m). These options have strike prices ranging from £ 0.84 to £ 2.27 . Of the total number of employee share options and share awards at 31 December 2020, 69 m ( 2019 : 43 m) were anti-dilutive. The 100 m ( 2019 : 125 m) increase in the basic weighted average number of shares are primarily due to shares issued under employee share schemes.

Dividends on ordinary shares

Dividends on ordinary shares	12 Months Ended
	Dec. 31, 2020
11. Dividends on ordinary shares
Dividends on ordinary shares	11 Dividends on ordinary shares In response to a request from the PRA, and to preserve additional capital for use in serving Barclays customers and clients through the extraordinary challenges presented by the COVID-19 pandemic, the Board agreed to cancel the 6.0p per ordinary share full year 2019 dividend. The Directors have approved a total dividend in respect of 2020 of 1. 0 p per ordinary share of 25 p each. The full year dividend for 2020 of 1. 0 p per ordinary share will be paid on 1 April 2021 t o shareholders on the Share Register on 26 February 2021. On 31 December 2020, there were 17,359 m ordinary shares in issue. The financial statements for the year ended 31 December 2020 do not reflect this dividend, which will be accounted for in shareholders ’ equity as an appropriation of retained profits in the year ending 31 December 2021. Dividends are funded out of distributable reserve s. The Directors have confirmed their intention to initiate a share buyback of up to £ 70 0 m after the balance sheet date. The share buyback is expected to commence in the first quarter of 2021. The financial statements for the year ended 31 December 2020 do not reflect the impact of the proposed share buyback, which will be accounted for as and when shares are repurchased by th e Company.

Trading portfolio

Trading portfolio	12 Months Ended
	Dec. 31, 2020
12. Trading Portfolio
Trading portfolio	12 Trading portfolio Accounting for trading portfolio assets and liabilities In accordance with IFRS 9, all assets and liabilities held for trading purposes are held at fair value with gains and losses in the changes in fair value taken to the income statement in net trading income (Note 5 ). Trading portfolio assets Trading portfolio liabilities 2020 2019 2020 2019 £m £m £m £m Debt securities and other eligible bills 56,482 52,739 (30,102) (23,741) Equity securities 62,192 56,000 (17,303) (13,175) Traded loans 8,348 5,378 - - Commodities 928 78 - - Trading portfolio assets/(liabilities) 127,950 114,195 (47,405) (36,916)

Financial assets at fair value

Financial assets at fair value through the income statement	12 Months Ended
	Dec. 31, 2020
Financial assets at fair value through the income statement [member]
Disclosure of financial assets [line items]
Financial assets at fair value through the income statement	13 Financial assets at fair value through the income statement Accounting for financial assets mandatorily at fair value Financial assets that are held for trading are recognised at fair value through profit or loss. In addition, financial assets are held at fair value through profit or loss if they do not contain contractual terms that give rise on specified dates to cash flows that are SPPI, or if the financial asset is not held in a business model that is either (i) a business model to co llect the contractual cash flows or (ii) a business model that is achieved by both collecting contractual cash flows and selling. Accounting for financial assets designated at fair value Financial assets, other than those held for trading, are classified in this category if they are so irrevocably designated at inception and the use of the designation removes or significantly reduces an accounting mismatch. Subsequent changes in fair value for these instruments are recognised in the income statement in n et investment income, except if reporting it in trading income reduces an accounting mismatch. The details on how the fair value amounts are derived for financial assets at fair value are described in Note 17 .

Derivative financial instrument

Derivative financial instruments	12 Months Ended
	Dec. 31, 2020
14. Derivative financial instruments
Derivative financial instruments	14 Derivative financial instruments Accounting for derivatives Derivative instruments are contracts whose value is derived from one or more underlying financial instruments or indices defined in the contract. They include swaps, forward-rate agreements, futures, options and combinations of these instruments and primarily affect the Group ’s net interest income, net trading income and derivative assets and liabilities. Notional amounts of the contracts are not recorded on the balance sheet . Derivatives are used to hedge interest rate, credit risk, inflation risk, exchange rate, commodity equity exposures , and exposures to certain indices such as house price indices and retail price indices related to non-trading positions. All derivati ve instruments are held at fair value through profit or loss, except for derivatives that are in a designated cash flow or net investment hedge accounting relationship. Derivatives are classified as assets when their fair value is positive or as liabilitie s when their fair value is negative. This includes terms included in a contract or financial liability (the host), which, had it been a standalone contract, would have met the definition of a derivative. If these are separated from the host, i.e. when the economic characteristics of the embedded derivative are not closely related with those of the host contract and the combined instrument is not measured at fair value through profit or loss, then they are accounted for in the same way as derivatives. For fi nancial assets, the requirements are whether the financial asset s contain contractual terms that give rise on specified dates to cash flows that are SPPI, and consequently the requirements for accounting for embedded derivatives are not applicable to finan cial assets. Hedge accounting The Group applies the requirements of IAS 39 Financial Instruments: Recognition and Measurement for hedge accounting purposes. The Group applies hedge accounting to represent the economic effects of its interest ra te, currency and contractually linked inflation risk management strategies. Where derivatives are held for risk management purposes, and when transactions meet the required criteria for documentation and hedge effectiveness, the Group applies fair value hedge accounting, cash flow hedge accounting, or hedging of a net investment in a foreign operation, as appropriate to the risks being hedged. The Group has applied the ‘Amendments to IFRS 9, IAS 39 and IFRS 7 Interest Rate Benchmark Reform’ i ssued in September 2019. In accordance with the transition provisions, the amendments have been adopted retrospectively to hedging relationships that existed at the start of the reporting period or were designated thereafter, and to the amount accumulated in the cash flow hedge reserve at that date. The amendments provide temporary relief from applying specific hedge accounting requirements to hedging relationships directly affected by IBOR (‘Interbank Offered Rates’) reform. The reliefs have the effect th at IBOR reform should not generally cause hedge accounting to terminate. However, any hedge ineffectiveness continues to be recorded in the income statement. Furthermore, the amendments set out triggers for when the reliefs will end, which include the unce rtainty arising from interest rate benchmark reform no longer being present. In summary, the reliefs provided by the amendments that apply to the Group are:  When considering the ‘highly probable’ requirement, the Group has assumed that the IBOR interest rates upon which our hedged items are based do not change as a result of IBOR Reform.  In assessing whether the hedge is expected to be highly effective on a forward-looking basis the Group has assumed that the IBOR interest rates upon which t he cash flows of the hedged items and the interest rate swaps that hedge them are based are not altered by IBOR reform.  The Group will not discontinue hedge accounting during the period of IBOR-related uncertainty solely because the retrospective effe ctiveness falls outside the required 80–125% range.  The Group has not recycled the cash flow hedge reserve relating to the period after the reforms are expected to take effect.  The Group has assessed whether the hedged IBOR risk component is a se parately identifiable risk only when it first designates a hedged item in a fair value hedge and not on an ongoing basis. The Group has elected to early adopt the ‘Amendments to IFRS 9, IAS 39, IFRS 7, IFRS 4 and IFRS 16 Interest Rate Benchmark Reform – Phase 2’ issued in August 2020. The Phase 2 amendments provide relief when changes are made to hedge relationships as a result of the interest rate benchmark reform. The Phase 2 amendments adopted by the Group are:  Under a temporary exception, the Group has considered that changes to the hedge designation and hedge documentation due to the interest rate benchmark reform woul d not constitute the discontinuation of the hedge relationship nor the designation of a new hedging relationship.  In respect of the retrospective hedge effectiveness assessment, the Group may elect, on a hedge-by-hedge basis, to reset the cumulative fa ir value changes to zero when the exception to the retrospective assessment ends (Phase 1 relief). Any hedge ineffectiveness will continue to be measured and recognised in full in profit or loss.  The Group has deemed the amounts accumulated in the cas h flow hedge reserve to be based on the alternative benchmark rate (on which the hedge future cash flows are determined) when there is a change in basis for determining the contractual cash flows.  For hedges of groups of items (such as those forming part o f a macro cash flow hedging strategy), the amendments provide relief for items within a designated group of items that are amended for changes directly required by the reform.  In respect of whether a risk component of a hedged item is separately identifiab le, the amendments provide temporary relief to entities to meet this requirement when an alternative risk free rate (RFR) financial instrument is designated as a risk component. These amendments allow the Group upon designation of the hedge to assume that the separately identifiable requirement is met if the Group reasonably expects the RFR risk will become separately identifiable within the next 24 months. The Group applies this relief to each RFR on a rate-by-rate basis and starts when the Group first designates the RFR as a non-contractually specified risk component. Fair value hedge accounting Changes in fair value of derivatives that qualify and are designated as fair value hedges are recorded in the income statement, together with changes in the fair value of the hedged asset or liability that are attributable to the hedged risk. The fair value changes adjust the carrying value of the hedged asset or liability held at amortised cost. If hedge relationships no longer meet the crite ria for hedge accounting, hedge accounting is discontinued. For fair value hedges of interest rate risk, the fair value adjustment to the hedged item is amortised to the income statement over the period to maturity of the previously designated hedge relati onship using the effective interest method. If the hedged item is sold or repaid, the unamortised fair value adjustment is recognised immediately in the income statement. For items classified as fair value through other comprehensive income, the hedge acco unting adjustment is included in other comprehensive income. Cash flow hedge accounting For qualifying cash flow hedges, the fair value gain or loss associated with the effective portion of the cash flow hedge is recognised initially in other comprehensi ve income, and then recycled to the income statement in the periods when the hedged item will affect profit or loss. Any ineffective portion of the gain or loss on the hedging instrument is recognised in the income statement immediately. When a hedging in strument expires or is sold, or when a hedge no longer meets the criteria for hedge accounting, any cumulative gain or loss existing in equity at that time remains in equity and is recognised when the hedged item is ultimately recognised in the income stat ement. When a forecast transaction is no longer expected to occur, the cumulative gain or loss that was recognised in equity is immediately transferred to the income statement. Hedges of net investments The Group ’s net investments in foreign opera tions, including monetary items accounted for as part of the net investment, are hedged for foreign currency risks using both derivatives and foreign currency borrowings. Hedges of net investments are accounted for similarly to cash flow hedges; the effect ive portion of the gain or loss on the hedging instrument is being recognised directly in other comprehensive income and the ineffective portion being recognised immediately in the income statement. The cumulative gain or loss recognised in other comprehen sive income is recognised in the income statement on the disposal or partial disposal of the foreign operation, or other reductions in the Group ’s investment in the operation. Total derivatives 2020 2019 Notional contract amount Fair value Notional contract amount Fair value Assets Liabilities Assets Liabilities £m £m £m £m £m £m Total derivative assets/(liabilities) held for trading 43,169,971 301,880 (299,795) 42,111,110 229,063 (228,617) Total derivative assets/(liabilities) held for risk management 189,784 566 (980) 181,375 173 (587) Derivative assets/(liabilities) 43,359,755 302,446 (300,775) 42,292,485 229,236 (229,204) Further information on netting arrangements of derivative financial instruments can be found within Note 18 . The fair values and notional amounts of derivative instruments held for trading and held for risk management are set out in the following table: Derivatives held for trading and held for risk management 2020 2019 Notional contract amount Fair value Notional contract amount Fair value Assets Liabilities Assets Liabilities £m £m £m £m £m £m Derivatives held for trading Foreign exchange derivatives OTC derivatives 5,461,057 84,401 (84,043) 4,906,647 56,480 (56,845) Derivatives cleared by central counterparty 78,946 335 (335) 74,698 84 (145) Exchange traded derivatives 14,034 3 (3) 18,520 12 (31) Foreign exchange derivatives 5,554,037 84,739 (84,381) 4,999,865 56,576 (57,021) Interest rate derivatives OTC derivatives 13,547,990 170,808 (161,157) 12,627,808 140,207 (133,401) Derivatives cleared by central counterparty 18,737,415 965 (885) 17,428,460 867 (1,093) Exchange traded derivatives 2,971,966 371 (360) 5,041,948 1,251 (1,265) Interest rate derivatives 35,257,371 172,144 (162,402) 35,098,216 142,325 (135,759) Credit derivatives OTC derivatives 384,900 3,674 (3,909) 399,386 5,253 (5,399) Derivatives cleared by central counterparty 462,945 931 (1,095) 426,130 2,962 (2,687) Credit derivatives 847,845 4,605 (5,004) 825,516 8,215 (8,086) Equity and stock index derivatives OTC derivatives 466,151 18,807 (26,094) 232,050 10,628 (15,785) Exchange traded derivatives 927,114 20,165 (20,521) 841,994 10,178 (10,849) Equity and stock index derivatives 1,393,265 38,972 (46,615) 1,074,044 20,806 (26,634) Commodity derivatives OTC derivatives 4,244 89 (110) 7,327 303 (256) Exchange traded derivatives 113,209 1,331 (1,283) 106,142 838 (861) Commodity derivatives 117,453 1,420 (1,393) 113,469 1,141 (1,117) Derivative assets/(liabilities) held for trading 43,169,971 301,880 (299,795) 42,111,110 229,063 (228,617) Total OTC derivatives 19,864,342 277,779 (275,313) 18,173,218 212,871 (211,686) Total derivatives cleared by central counterparty 19,279,306 2,231 (2,315) 17,929,288 3,913 (3,925) Total exchange traded derivatives 4,026,323 21,870 (22,167) 6,008,604 12,279 (13,006) Derivative assets/(liabilities) held for trading 43,169,971 301,880 (299,795) 42,111,110 229,063 (228,617) Derivatives held for risk management Derivatives designated as cash flow hedges OTC foreign exchange derivatives 6,596 351 - - - - OTC interest rate derivatives 2,433 35 - 1,195 7 (1) Interest rate derivatives cleared by central counterparty 65,408 - - 66,578 - - Derivatives designated as cash flow hedges 74,437 386 - 67,773 7 (1) Derivatives designated as fair value hedges OTC interest rate derivatives 11,116 155 (980) 8,379 136 (586) Interest rate derivatives cleared by central counterparty 103,440 - - 104,078 - - Derivatives designated as fair value hedges 114,556 155 (980) 112,457 136 (586) Derivatives designated as hedges of net investments OTC foreign exchange derivatives 791 25 - 1,145 30 - Derivatives designated as hedges of net investments 791 25 - 1,145 30 - Derivative assets/(liabilities) held for risk management 189,784 566 (980) 181,375 173 (587) Total OTC derivatives 20,936 566 (980) 10,719 173 (587) Total derivatives cleared by central counterparty 168,848 - - 170,656 - - Derivative assets/(liabilities) held for risk management 189,784 566 (980) 181,375 173 (587) Hedge accounting Hedge accounting is applied predominantly for the following risks:  Interest rate risk – arises due to a mismatch between fixed interest rates and floating interest rates. Interest rate risk also includes exposure to inflation risk fo r certain types of investments .  Currency risk – arises due to assets or liabilities being denominated in different currencies than the functional currency of the relevant entity. At a consolidated level , currency risk also arises when the functional currency of subsidiaries are different from the parent .  Contractually linked inflation risk – arises from financial instruments within contractually specified inflation risk. The Group does not hedge inflation risk that arises from other activities . In order to hedge these risks, the Group uses the following hedging instruments:  I nterest rate derivatives to swap interest rate exposures into either fixed or variable rate s.  Currency derivatives to swap foreign currency exposures into the entity’s functional currency, and net investment exposure to local currency .  Inflation derivatives to swap inflation exposure into either fixed or variable interest rates . In some cases, certain items which are economically hedged may be ineligible hedged items for the purposes of IAS 39, such as core deposits and equity . In these instances, a proxy hedging solution can be utilised whereby portfolios of floating rate assets are designated as eligible hedged items in cash flow hedges. In some hedging relationships, the Group designate s risk components of hedged items as follows:  Benchmark interest rate risk as a component of interest rate ri sk, such as the LIBOR or Risk Free Rate (RFR) component .  Inflation risk as a contractually specified component of a debt instrument .  Spot exchange r ate risk for foreign currency financial assets or financial liabilities .  Components of cash flows of hedged items, for example certain interest payments for part of the life of an instrument . Using the benchmark interest rate risk results in other risks , such as credit risk and liquidity risk , being excluded from the hedge accounting relationship. LIBOR is considered the predominant interest rate risk and therefore the hedged items change in fair value on a fully proportionate basis with reference to this risk. In respect of many of the Group ’s hedge accounting relationships, the hedged item and hedging instrument change frequently due to the dynamic nature of the risk management and hedge accounting strategy. The Group applies hedge accounting to dynamic scenarios, predominantly in relation to interest rate risk, with a combination of hedged items in order for its financial statements to reflect as closely as possible the economic risk management undertaken. In some cases, if the hedge accountin g objective changes, the relevant hedge accounting relationship is de-designated and is replaced with a different hedge accounting relationship. Changes in the GBP value of net investments due to foreign currency movements are captured in the currency translation reserve, resulting in a movement in CET1 capital. The Group mitigates this by matching the CET1 capital movements to the revaluation of the foreign currency RWA exposures. Net investment hedges are designated where necessa ry to reduce the exposure to movement in a particular exchange rat e to within limits mandated by R isk. As far as possible, existing external currency liabilities are designa ted as the hedging instruments. The hedging instruments share the same risk exposu res as the hedged items. Hedge effectiveness is determined with reference to quantitative tests, predominantly regression testing , but to the extent hedging instruments are exposed to different risks than the hedged items, this could result in hedge ineffe ctiveness or hedge accounting failures. Sources of ineffectiveness include the following :  Mismatches between the contractual terms of the hedged item and hedging instrument, including basis differences .  Changes in credit risk of the hedging instruments .  If a hedging relationship becomes over-hedged, for example in hedges of net investments if the net asset value designated at the start of the period falls below the amount of the hedging instrument.  Cash flow hedge s using external swaps with non-zero fair value s.  The effects of the forthcoming reforms to IBOR because these might take effect at a different time and have a different impact on hedged items and hedging instruments. Across all benchmarks which Barclays is materially exposed to, there is still uncertainty regarding the precise timing and effects of IBOR reform. There is yet to be full consensus regarding methodologies for converging existing IBORs to their final benchmark rates. As such, Barclays has not incorporated any change in assumptions fo r affected benchmarks into its expectations or calculations. Barclays does, however, assume sufficient liquidity in IBOR linked benchmarks to provide reliable valuation calculations of both hedged items and hedging instruments (notwithstanding reliefs alre ady applied within the financial reporting). The following table summarises the significant hedge accounting exposures impacted by the IBOR reform (see Note 41 for further updates) as at 31 December 20 20 : Nominal amount of hedged items directly impacted by IBOR reform Nominal amount of hedging instruments directly impacted by IBOR reform Current benchmark rate Expected convergence to RFR £m £m GBP London Interbank Offered rate (LIBOR) Reformed Sterling Overnight Index Average (SONIA) 15,740 14,276 USD LIBOR Secured Overnight Financing Rate (SOFR) 29,154 28,832 Euro Overnight Index Average (EONIA) Euro Short-Term Rate (€STR) 5,128 5,128 JPY LIBOR Tokyo Overnight Average (TONA) 1,262 1,262 CHF LIBOR Swiss Average Rate Overnight (SARON) 145 145 All Other IBORs Various Other RFRs 111 111 Total 51,540 49,754 Hedged items in fair value hedges Accumulated fair value adjustment included in carrying amount Hedged item statement of financial position classification and risk category Carrying amount Total Of which: Accumulated fair value adjustment on items no longer in a hedge relationship Change in fair value used as a basis to determine ineffectiveness Hedge ineffectiveness recognised in the income statement a £m £m £m £m £m 2020 Assets Loans and advances at amortised cost - Interest rate risk 9,858 2,289 (638) 1,583 111 - Inflation risk 545 345 - 25 3 Debt securities classified at amortised cost - Interest rate risk 1,440 23 - 18 (7) - Inflation risk 4,071 (43) - 453 3 Financial assets at fair value through other comprehensive income - Interest rate risk 41,544 1,284 351 825 (13) - Inflation risk 10,821 367 (9) 307 1 Total assets 68,279 4,265 (296) 3,211 98 Liabilities Debt securities in issue - Interest rate risk (50,438) (2,859) (24) (1,466) (56) Total liabilities (50,438) (2,859) (24) (1,466) (56) Total hedged items 17,841 1,406 (320) 1,745 42 2019 Assets Loans and advances at amortised cost - Interest rate risk 8,442 694 (643) 1,030 76 - Inflation risk 525 325 - (2) 1 Debt securities classified at amortised cost - Interest rate risk 2,974 (1) - (1) - - Inflation risk 2,258 (41) - (41) 1 Financial assets at fair value through other comprehensive income - Interest rate risk 32,169 922 494 2,046 (4) - Inflation risk 7,811 87 - 111 (16) Total assets 54,179 1,986 (149) 3,143 58 Liabilities Debt securities in issue - Interest rate risk (55,589) (1,574) (75) (1,445) (13) Total liabilities (55,589) (1,574) (75) (1,445) (13) Total hedged items (1,410) 412 (224) 1,698 45 Note a Hedge ineffectiveness is recognised in net interest income . For items classified as fair value through other comprehensive income , the hedge accounting adjustment is not included in the carrying amount, but rather adjusts other comprehensive income. The following table shows the fair value hedging instruments which are carried on the Group’s balance sheet : Carrying value Nominal amount Change in fair value used as a basis to determine ineffectiveness Nominal amount directly impacted by IBOR reform Derivative assets Derivative liabilities Loan liabilities Hedge type Risk category £m £m £m £m £m £m As at 31 December 2020 Fair value Interest rate risk 120 (166) - 103,623 (925) 30,072 Inflation risk 35 (815) - 10,933 (778) 1,487 Total 155 (980) - 114,556 (1,703) 31,559 As at 31 December 2019 Fair value Interest rate risk 110 (44) - 104,568 (1,571) 55,552 Inflation risk 26 (542) - 7,889 (82) 6,101 Total 136 (586) - 112,457 (1,653) 61,653 The following table profiles the expected notional values of current hedging instruments in future years: 2020 2021 2022 2023 2024 2025 2026 and later As at 31 December £m £m £m £m £m £m £m Fair value hedges of: Interest rate risk (outstanding notional amount) 103,623 94,402 81,916 72,281 58,001 47,244 40,243 Inflation risk (outstanding notional amount) 10,933 10,128 8,817 7,966 6,051 5,062 4,348 There are 1,906 ( 2019 : 2,308 ) interest rate risk fair value hedges with an average fixed rate of 1.87 % ( 2019 : 2.13 %) across the relationships and 104 ( 2019 : 117 ) inflation risk fair value hedges with an average rate of 0.63 % ( 2019 : 0.70 %) across the relationships. Hedged items in cash flow hedges and hedges of net investments in foreign operations Description of hedge relationship and hedged risk Change in value of hedged item used as the basis for recognising ineffectiveness Balance in cash flow hedging reserve for continuing hedges Balance in currency translation reserve for continuing hedges Balances remaining in cash flow hedging reserve for which hedge accounting is no longer applied Balances remaining in currency translation reserve for which hedge accounting is no longer applied Hedging gains or losses recognised in other comprehensive income Hedge ineffectiveness recognised in the income statement a £m £m £m £m £m £m £m 2020 Cash flow hedge of: Interest rate risk Loans and advances at amortised cost (1,124) (598) - (1,370) - (1,124) 27 Foreign exchange risk Loans and advances at amortised cost (70) (15) - - - (70) - Debt securities classified at amortised cost (278) (65) - - - (278) - Inflation risk Debt securities classified at amortised cost (41) (65) - - - (41) 1 Total cash flow hedge (1,513) (743) - (1,370) - (1,513) 28 Hedge of net investment in foreign operations USD foreign operations (240) - 857 - - (240) - EUR foreign operations (17) - (2) - - (17) - Other foreign operations (9) - 47 - 186 (9) - Total foreign operations (266) - 902 - 186 (266) - 2019 Cash flow hedge of: Interest rate risk Loans and advances at amortised cost (696) (223) - (1,072) - (706) 43 Inflation risk Debt securities classified at amortised cost (29) (26) - - - (25) 2 Total cash flow hedge (725) (249) - (1,072) - (731) 45 Hedge of net investment in foreign operations USD foreign operations 215 - 1,087 - - 215 - EUR foreign operations 70 - (1) - 16 70 - Other foreign operations 3 - 1 - 240 3 - Total foreign operations 288 - 1,087 - 256 288 - Note a Hedge ineffectiveness is recognised in net interest income. The following table shows the cash flow and net investment hedging instruments which are carried on the Group’s balance sheet : Carrying value Nominal amount Change in fair value used as a basis to determine ineffectiveness Nominal amount directly impacted by IBOR reform Derivative assets Derivative liabilities Loan liabilities Hedge type Risk category £m £m £m £m £m £m As at 31 December 2020 Cash flow Interest rate risk 33 - - 65,042 1,151 18,195 Foreign exchange risk 351 - - 6,596 348 - Inflation risk 2 - - 2,799 42 - Total 386 - - 74,437 1,541 18,195 Net investment Foreign exchange risk 25 - (8,660) 9,451 265 - As at 31 December 2019 Cash flow Interest rate risk 3 (1) - 66,515 739 15,223 Inflation risk 4 - - 1,258 31 - Total 7 (1) - 67,773 770 15,223 Net investment Foreign exchange risk 30 - (10,051) 11,196 288 - There are 29 (2019: nil ) foreign exchange risk cash flow hedges with an average foreign exchange ra te of 135.29 JPY: 1 GBP (2019: nil ) across the relationships. The Group’s risk exposure is directly affected by interest rate benchmark reform, across both its cash flow hedge accounting activities; where IBOR-linked derivatives are designated as a cash flow hedge of IBOR-linked cash flows, and its fair value hedge accounting activities; where IBOR-linked derivatives are designated as a fair value hedge of f ixed interest rate assets and liabilities. Further information on the group’s risk exposure and response can be found in N ote 41 . The effect on the income statement and other comprehensive income of recycling amounts in respect of cash flow hedges and net investment hedges of foreign operat ions is set out in the following table: 2020 2019 Amount recycled from other comprehensive income due to hedged item affecting income statement Amount recycled from other comprehensive income due to sale of investment, or cash flows no longer expected to occur Amount recycled from other comprehensive income due to hedged item affecting income statement Amount recycled from other comprehensive income due to sale of investment, or cash flows no longer expected to occur Description of hedge relationship and hedged risk £m £m £m £m Cash flow hedge of interest rate risk Recycled to net interest income 489 17 259 18 Cash flow hedge of foreign exchange risk Recycled to net interest income 268 - - - Hedge of net investment in foreign operations Recycled to other income - (4) - 15

Financial assets at fair valu_2

Financial assets at fair value through other comprehensive income	12 Months Ended
	Dec. 31, 2020
Disclosure of financial assets [line items]
Financial assets at fair value through other comprehensive income	15 Financial assets at fair value through other comprehensive income Accounting for financial assets at fair value through oth er comprehensive income (FVOCI ) Financial assets that are debt instruments held in a business model that is achieved by both collecting contractual cash flows and selling and that contain contractual terms that give rise on specified dates to cash flows that are SPPI are measured at FVOCI. They are subsequently re - measured at fair value and changes therein (except for t hose relating to impairment, interest income and foreign currency exchange gains and losses) are recognised in other comprehensive income until the assets are sold. Interest (calculated using the effective interest method) is recognised in the income state ment in net interest income (Note 3 ). Upon disposal, the cumulative gain or loss recognised in other comprehensive income is in cluded in net investment income (N ote 6). In determining whether the business model is achieved by both collecting contractua l cash flows and selling financial assets, it is determined that both collecting contractual cash flows and selling financial assets are integral to achieving the objective of the business model. T he Group will consider past sales and expectations abo ut future sales to establish if the business model is achieved . For equity securities that are not held for trading, the Group may make an irrevocable election on initial recognition to present subsequent changes in the fair value of the instrument i n other comprehensive income (except for dividend income which is recognised in profit or loss). Gains or losses on the de - recognition of these equity securities are not transferred to profit or loss. These assets are also not subject to the impairment req uirements and therefore no amounts are recycled to the income statement. Where the Group has not made the irrevocable election to present subsequent changes in the fair value of the instrument in other comprehensive income, equity securities are measu red at fair value through profit or loss. 2020 2019 £m £m Debt securities and other eligible bills 77,736 64,103 Equity securities 761 1,023 Loans and advances 191 624 Financial assets at fair value through other comprehensive income 78,688 65,750
Financial assets at fair value through other comprehensive income [member]
Disclosure of financial assets [line items]
Financial assets at fair value through other comprehensive income	2020 2019 £m £m Debt securities and other eligible bills 77,736 64,103 Equity securities 761 1,023 Loans and advances 191 624 Financial assets at fair value through other comprehensive income 78,688 65,750

Financial liabilities designate

Financial liabilities designated at fair value	12 Months Ended
	Dec. 31, 2020
Financial liabilities designated at fair value [member]
Disclosure of financial liabilities [line items]
Financial liabilities designated at fair value	16 Financial liabilities designated at fair value Accounting for liabilities designated at fair value through profit and loss In accordance with IFRS 9, financial liabilities may be designated at fair value, with gains and losses taken to the income statement within net trading income (Note 5 ) and net investment income (Note 6 ). Movements in own credit are reported thro ugh other comprehensive income, unless the effects of changes in the liability's credit risk would crea t e or enlarge an accounting mismatch in P&L. In these scenarios, all gains and losses on that liability (including the effects of changes in the credit risk of the liability) are presented in P&L. On derecognition of the financial liability no amount relat ing to own credit risk are recycled to the income statement. The Group has the ability to make the fair value designation when holding the instruments at fair value reduces an accounting mismatch (caused by an offsetting liability or asset being held at fair value), or is managed by the Group on the basis of its fair value, or includes terms that have substantive derivative characteristics (Note 14 ). The details on how the fair value amounts are arrived at for financial liabilities desi gnated at fair value are described in Note 17 . 2020 2019 Fair value Contractual amount due on maturity Fair value Contractual amount due on maturity £m £m £m £m Debt securities 50,437 57,650 49,559 56,891 Deposits 21,706 22,107 25,526 25,725 Repurchase agreements and other similar secured borrowing 177,371 177,389 128,547 128,706 Other financial liabilities 251 251 694 694 Financial liabilities designated at fair value 249,765 257,397 204,326 212,016 The cumulative own credit net loss recognised is £ 954 m (201 9 : £ 373 m loss).

Fair value of financial instrum

Fair value of financial instruments	12 Months Ended
	Dec. 31, 2020
17. Fair value of financial instruments
Fair value of financial instruments	17 Fair value of financial instruments Accounting for financial assets and liabilities – fair values Financial instruments that are held for trading are recognised at fair value through profit or loss. In addition, financial assets are held at fair value through profit or loss if they do not contain contractual terms that give rise on specified dates to cash flows that are SP PI, or if the financial asset is not held in a business model that is either (i) a business model to collect the contractual cash flows or (ii) a business model that is achieved by both collecting contractual cash flows and selling. Subsequent changes in f air value for these instruments are recognised in the income statement in net investment income, except if reporting it in trading income reduces an accounting mismatch. All financial instruments are initially recognised at fair value on the date of ini tial recognition (including transaction costs, other than financial instruments held at fair va lue through profit or loss) and depending on the subsequent classification of the financial asset or liability, may continue to be held at fair value either thro ugh profit or loss or other comprehensive income. The fair value of a financial instrument is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Wherever possible, fair value is determined by reference to a quoted market price for that instrument. For many of the Group ’s financial assets and liabilities, especially derivatives, quoted prices are not available and valuation models are used to e stimate fair value. The models calculate the expected cash flows under the terms of each specific contract and then discount these values back to a present value. These models use as their basis independently sourced market inputs including, for example, i nterest rate yield curves, equities and commodities prices, option volatilities and currency rates. For financial liabilities measured at fair value, the carrying amount reflects the effect on fair value of changes in own credit spreads derived from obser vable market data such as in primary issuance and redemption activity for structured notes. On initial recognition, it is presumed that the transaction price is the fair value unless there is observable information available in an active market to the co ntrary. The best evidence of an instrument’s fair value on initial recognition is typically the transaction price. However, if fair value can be evidenced by comparison with other observable current market transactions in the same instrument, or is based o n a valuation technique whose inputs include only data from observable markets, then the instrument should be recognised at the fair value derived from such observable market data. For valuations that have made use of unobservable inputs, the difference b etween the model valuation and the initial transaction price (Day One profit) is recognised in profit or loss either: on a straight-line basis over the term of the transaction; or over the period until all model inputs will become observable where appropri ate; or released in full when previously unobservable inputs become observable. Various factors influence the availability of observable inputs and these may vary from product to product and change over time. Factors include the depth of activity in the r elevant market, the type of product, whether the product is new and not widely traded in the marketplace, the maturity of market modelling and the nature of the transaction (bespoke or generic). To the extent that valuation is based on models or inputs tha t are not observable in the market, the determination of fair value can be more subjective, dependent on the significance of the unobservable input to the overall valuation. Unobservable inputs are determined based on the best information available, for ex ample by reference to similar assets, similar maturities or other analytical techniques. The sensitivity of valuations used in the financial statements to possible changes in significant unobservable inputs is shown on page 323 . Critical accounting esti mates and judgements The valuation of financial instruments often involves a significant degree of judgement and complexity, in particular where valuation models make use of unobservable inputs (‘Level 3’ assets and liabilities). This note provides information on these instruments, including the related unrealised gains and losses recognised in the period, a description of significant valuation techniques and unobservable inputs, and a sensitivity analysis. Valuation IFRS 13 Fair value m easurement requires an entity to classify its assets and liabilities according to a hierarchy that reflects the observability of significant market inputs. The three levels of the fair value hierarchy are defined below. Quoted market prices – Level 1 Assets and liabilities are classified as Level 1 if their value is observable in an active market. Such instruments are valued by reference to unadjusted quoted prices for identical assets or liabilities in active markets wh ere the quoted price is readily available, and the price represents actual and regularly occurring market transactions. An active market is one in which transactions occur with sufficient volume and frequency to provide pricing information on an ongoing ba sis. Valuation technique using observable inputs – Level 2 Assets and liabilities classified as Level 2 have been valued using models whose inputs are observable either directly or indirectly. Valuations based on observable inputs include assets and lia bilities such as swaps and forwards which are valued using market standard pricing techniques, and options that are commonly traded in markets where all the inputs to the market standard pricing models are observable. Valuation technique using significan t unobservable inputs – Level 3 Assets and liabilities are classified as Level 3 if their valuation incorporates significant inputs that are not based on observable market data (unobservable inputs). A valuation input is considered observable if it can be directly observed from transactions in an active market, or if there is compelling external evidence demonstrating an executable exit price. Unobservable input levels are generally determined via reference to observable inputs, historical observations or using other analytical techniques . 17 Fair value of financial instruments continued 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: Assets and liabilities held at fair value 2020 2019 Valuation technique using Valuation technique using Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total As at 31 December £m £m £m £m £m £m £m £m Trading portfolio assets 60,671 65,416 1,863 127,950 60,352 51,579 2,264 114,195 Financial assets at fair value through the income statement 4,503 162,142 8,506 175,151 10,445 114,141 8,500 133,086 Derivative financial assets 9,155 288,822 4,469 302,446 5,439 220,642 3,155 229,236 Financial assets at fair value through other comprehensive income 19,792 58,743 153 78,688 18,755 46,566 429 65,750 Investment property - - 10 10 - - 13 13 Total assets 94,121 575,123 15,001 684,245 94,991 432,928 14,361 542,280 Trading portfolio liabilities (24,391) (22,986) (28) (47,405) (20,977) (15,939) - (36,916) Financial liabilities designated at fair value (159) (249,251) (355) (249,765) (82) (203,882) (362) (204,326) Derivative financial liabilities (8,762) (285,774) (6,239) (300,775) (5,305) (219,910) (3,989) (229,204) Total liabilities (33,312) (558,011) (6,622) (597,945) (26,364) (439,731) (4,351) (470,446) The following table shows the Group’s Level 3 assets and liabilities that are held at fair value disaggregated by product type: Level 3 assets and liabilities held at fair value by product type 2020 2019 Assets Liabilities Assets Liabilities £m £m £m £m Interest rate derivatives 1,613 (1,615) 605 (812) Foreign exchange derivatives 144 (143) 291 (298) Credit derivatives 196 (351) 539 (342) Equity derivatives 2,498 (4,112) 1,711 (2,528) Commodity derivatives 18 (18) 9 (9) Corporate debt 698 (3) 521 - Reverse repurchase and repurchase agreements - (174) - (167) Non-asset backed loans 6,394 - 6,811 - Asset backed securities 767 (24) 756 - Equity cash products 542 - 1,228 - Private equity investments 873 (14) 899 (19) Other a 1,258 (168) 991 (176) Total 15,001 (6,622) 14,361 (4,351) Note a Other includes commercial real estate loans, asset backed loans, funds and fund-linked products, issued debt, government sponsored debt and investment property. 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 the valuation techniques used, as well as the availability and reliability of observable proxy and historical data and the impact of using alternative models. Sensitivities a re 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 wit hout reflecting the impact of any diversification in the portfolio. The valuation techniques used, observability and sensitivity analysis for material products within Level 3, are described below. Interest rate derivatives Description: Derivatives linke d to interest rates or inflation indices. The category includes futures, interest rate and inflation swaps, swaptions, caps, floors, inflation options, balance guaranteed swaps and other exotic interest rate derivatives. Valuation: Interest rate and infla tion derivatives are generally valued using curves of forward rates constructed from market data to project and discount the expected future cash flows of trades. Instruments with optionality are valued using volatilities implied from market inputs, and us e industry standard or bespoke models depending on the product type. Observability: In general, inputs are considered observable up to liquid maturities which are determined separately for each input and underlying. Unobservable inputs are generally set by referencing liquid market instruments and applying extrapolation techniques or inferred via another reasonable method. Foreign exchange derivatives Description: Derivatives linked to the foreign exchange (FX) market. The category includes FX forward co ntracts, FX swaps and FX options. The majority are traded as over the counter (OTC) derivatives. Valuation: FX derivatives are valued using industry standard and bespoke models depending on the product type. Valuation inputs include FX rates, interest rat es, FX volatilities, interest rate volatilities, FX interest rate correlations and others as appropriate. Observability: FX correlations, forwards and volatilities are generally observable up to liquid maturities which are determined separately for each input and underlying. Unobservable inputs are set by referencing liquid market instruments and applying extrapolation techniques, or inferred via another reasonable method. Credit derivatives Description: Derivatives linked to the credit spread of a referenced entity, index or basket of referenced entities or a pool of referenced assets (e.g. a securitised product). The category includes single name and index credit default swaps (CDS) and total return swaps (TRS) . Valuation: CDS are valued on industry stand ard models using curves of credit spreads as the principal input. Credit spreads are observed directly from broker data, third party vendors or priced to proxies. Observability: CDS contracts referencing entities that are actively traded are generally con sidered observable. Other valuation inputs are considered observable if products with significant sensitivity to the inputs are actively traded in a liquid market. Unobservable valuation inputs are generally determined with reference to recent transactions or inferred from observable trades of the same issuer or similar entities. Equity derivatives Description : Exchange traded or OTC derivatives linked to equity indices and single names. The category includes vanilla and exotic equity products. Valuation: Equity derivatives are valued using industry standard models. Valuation inputs include stock prices, dividends, volatilities, interest rates, equity repurchase curves and, for multi-asset products, correlations. Observability: In general, valuation input s are observable up to liquid maturities which are determined separately for each input and underlying. Unobservable inputs are set by referencing liquid market instruments and applying extrapolation techniques, or inferred via another reasonable method. Commodity derivatives Description: Exchange traded and OTC derivatives based on underlying commodities such as metals, crude oil and refined products, agricultural, power and natural gas.   Valuation: Commodity swaps and options are valued using models i ncorporating discounting of cash flows and other industry standard modelling techniques. Valuation inputs include forward curves, volatilities implied from market observable inputs and correlations. Observability: Commodity correlations, forwards and vol atilities are generally observable up to liquid maturities which are determined separately for each input and underlying. Unobservable inputs are set with reference to similar observable products, or by applying extrapolation techniques to observable input s. Corporate debt Description: Primarily corporate bonds. Valuation: Corporate bonds are valued using observable market prices sourced from broker quotes, inter-dealer prices or other reliable pricing sources. Observability: Prices for actively traded bonds are considered observable. Unobservable bonds prices are generally determined by reference to bond yields or CDS spreads for actively traded instruments issued by or referencing the same (or a similar) issuer. Reverse repurchase and repurchase agre ements Description: Includes securities purchased under resale agreements, securities sold under repurchase agreements, and other similar secured lending agreements. The agreements are primarily short-term in nature. Valuation: Repurchase and reverse repu rchase agreements are generally valued by discounting the expected future cash flows using industry standard models that incorporate market interest rates and repurchase rates, based on the specific details of the transaction. Observability: Inputs are de emed observable up to liquid maturities, and are determined based on the specific features of the transaction. Unobservable inputs are generally set by referencing liquid market instruments and applying extrapolation techniques, or inferred via another rea sonable method. Non-asset backed loans Description: Largely made up of fixed rate loans. Valuation: Fixed rate loans are valued using models that discount expected future cash flows based on interest rates and loan spreads. Observability: Within this loan population, the loan spread is generally unobservable. Unobservable loan spreads are determined by incorporating funding costs, the level of comparable assets such as gilts, issuer credit quality and other factors.   Asset backed securities Descriptio n: S ecurities that are linked to the cash flows of a pool of referenced assets via securitisation. The category includes residential mortgage backed securities, commercial mortgage backed securities, CDOs, collateralised loan obligations (CLOs) and other a sset backed securities. Valuation: Where available, valuations are based on observable market prices sourced from broker quotes and inter-dealer prices. Otherwise, valuations are determined using industry standard discounted cash flow analysis that calculates the fair value based on valuation inputs such as constant default rate, conditional prepayment rate, loss given default and yield. These inputs are determined by reference to a number of sources including proxying to observed transactions, market indices or market research, and by assessing underlying collateral performance. Proxying to observed transactions, indices or research requires an assessment and comparison of the relevant securities’ underlying attributes including collateral, t ranche, vintage, underlying asset composition (historical losses, borrower characteristics and loan attributes such as loan to value ratio and geographic concentration) and credit ratings (original and current). Observability: Where an asset backed produc t does not have an observable market price and the valuation is determined using a discounted cash flow analysis, the instrument is considered unobservable. Equity cash products Description: Includes listed equities, Exchange Traded Funds (ETF) and prefe rence shares. Valuation: Valuation of equity cash products is primarily determined through market observable prices. Observability: P rices for actively traded equity cash products are considered observable. Unobservable equity prices are generally determ ined by reference to actively traded instruments that are similar in nature, or inferred via another reasonable method. Private equity investments Description : Includes investments in equity holdings in operating companies not quoted on a public exchange. Valuation: Private equity investments are valued in accordance with the ‘International Private Equity and Venture Capital Valuation Guidelines’ which require the use of a number of individual pricing benchmarks such as the prices of recent transactions in the same or similar entities, discounted cash flow analysis and comparison with the earnings multiples of listed companies. While the valuation of unquoted equity instruments is subjective by nature, the relevant methodologies are commonly applied by ot her market participants and have been consistently applied over time. Observability: Inputs are considered observable if there is active trading in a liquid market of products with significant sensitivity to the inputs. Unobservable inputs include earning s estimates, multiples of comparative companies, marketability discounts and discount rates. Other Description: Other includes commercial real estate loans, funds and fund-linked products, asset backed loans, physical commodities and investment property. Assets and liabilities reclas sified between Level 1 and Level 2 During the period, there were no material transfers between Level 1 and Lev el 2 (2019 : there were no material transfers between Level 1 and Level 2 ). Level 3 movement analysis The following table summarises the movements in the Level 3 balances 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 y ear. Asset and liability transfers between Level 2 an d Level 3 are primarily due to i ) an increase or decrease in observable market a ctivity related to an input or ii ) a change in the significance of the unobservable input, with assets and liabilities cla ssified as Level 3 if an unobservable input is deemed significant. Analysis of movements in Level 3 assets and liabilities As at 1 January 2020 Total gains and losses in the period recognised in the income statement Total gains or losses recognised in OCI Transfers As at 31 December 2020 Purchases Sales Issues Settlements Trading income Other income In Out £m £m £m £m £m £m £m £m £m £m £m Corporate debt 120 77 (6) - - (35) - - 12 (17) 151 Non-asset backed loans 974 1,955 (2,182) - (12) (10) - - 39 (55) 709 Asset backed securities 656 458 (428) - (40) (25) - - 90 (25) 686 Equity cash products 392 5 (149) - - (41) - - 11 (4) 214 Other 122 - - - - (21) - - 2 - 103 Trading portfolio assets 2,264 2,495 (2,765) - (52) (132) - - 154 (101) 1,863 Non-asset backed loans 5,494 1,102 (283) - (706) 426 - - - (453) 5,580 Equity cash products 835 15 (404) - - (93) (36) - 9 - 326 Private equity investments 900 84 (54) - (3) - (56) - 15 (12) 874 Other 1,271 3,718 (3,606) - (32) 32 (43) - 386 - 1,726 Financial assets at fair value through the income statement 8,500 4,919 (4,347) - (741) 365 (135) - 410 (465) 8,506 Non-asset backed loans 343 - - - (237) - - - - - 106 Asset backed securities 86 - (35) - - - - (4) - - 47 Financial assets at fair value through other comprehensive income 429 - (35) - (237) - - (4) - - 153 Investment property 13 - (2) - - - (1) - - - 10 Trading portfolio liabilities - (27) - - - (1) - - - - (28) Financial liabilities designated at fair value (362) - 3 (21) 1 20 4 - (38) 38 (355) Interest rate derivatives (206) 17 (12) - 85 109 - - (18) 23 (2) Foreign exchange derivatives (7) - - - 21 (16) - - (19) 22 1 Credit derivatives 198 (125) 24 - (371) 24 - - (21) 116 (155) Equity derivatives (819) (699) (43) - 105 (101) - - (13) (44) (1,614) Net derivative financial instruments a (834) (807) (31) - (160) 16 - - (71) 117 (1,770) Total 10,010 6,580 (7,177) (21) (1,189) 268 (132) (4) 455 (411) 8,379 Note a The derivative financial instruments are represented on a net basis. On a gross basis, derivative financial assets are £ 4,469 m ( 2019 : £ 3,155 m) and derivative financial liabilities are £ 6,239 m ( 2019 : £ 3,989 m ) . Analysis of movements in Level 3 assets and liabilities As at 1 January 2019 Purchases Sales Issues Settlements Total gains and losses in the period recognised in the income statement Total gains or losses recognised in OCI Transfers As at 31 December 2019 Trading income Other income In Out £m £m £m £m £m £m £m £m £m £m £m Corporate debt 388 126 (52) - (311) 1 - - 45 (77) 120 Non-asset backed loans 2,263 1,844 (2,799) - (134) 24 - - 200 (424) 974 Asset backed securities 664 202 (166) - - (30) - - 16 (30) 656 Equity cash products 136 62 (40) - - (31) - - 293 (28) 392 Other 162 - - - (1) (24) - - - (15) 122 Trading portfolio assets 3,613 2,234 (3,057) - (446) (60) - - 554 (574) 2,264 Non-asset backed loans 5,688 235 - - (755) 343 (1) - - (16) 5,494 Equity cash products 559 66 - - (2) 3 209 - - - 835 Private equity investments 1,071 45 (121) - (28) - 55 - 41 (163) 900 Other 2,064 5,719 (5,720) - (9) 12 (15) - 24 (804) 1,271 Financial assets at fair value through the income statement 9,382 6,065 (5,841) - (794) 358 248 - 65 (983) 8,500 Non-asset backed loans - 283 - - - - - 60 - - 343 Asset backed securities - 116 (30) - - - - - - - 86 Equity cash products 2 - (1) - - - - (1) - - - Other 353 - - - (135) - - - - (218) - Financial assets at fair value through other comprehensive income 355 399 (31) - (135) - - 59 - (218) 429 Investment property 9 5 - - - - (1) - - - 13 Trading portfolio liabilities (3) - - - - - - - - 3 - Financial liabilities designated at fair value (280) (179) 10 (42) 41 67 (2) - (27) 50 (362) - Interest rate derivatives 22 (9) - - 88 (92) - - (177) (38) (206) Foreign exchange derivatives 7 - - - 25 (12) - - (32) 5 (7) Credit derivatives 1,050 (59) 3 - (866) 76 - - (9) 3 198 Equity derivatives (607) (296) (35) - (2) (296) - - (37) 454 (819) Net derivative financial instruments 472 (364) (32) - (755) (324) - - (255) 424 (834) Total 13,548 8,160 (8,951) (42) (2,089) 41 245 59 337 (1,298) 10,010 Unrealised gains and losses on Level 3 financial assets and liabilities The fo llowing table discloses the unrealised gains and losses recognised in the year arising on Level 3 financial assets and liabilities held at year end . Unrealised gains and losses recognised during the period on Level 3 assets and liabilities held at year end 2020 2019 Income statement Other compre- hensive income Income statement Other compre- hensive income Trading income Other income Total Trading income Other income Total As at 31 December £m £m £m £m £m £m £m £m Trading portfolio assets (114) - - (114) (57) - - (57) Financial assets at fair value through the income statement 399 (89) - 310 346 246 - 592 Fair value through other comprehensive income - - (1) (1) - - 60 60 Investment property - (1) - (1) - (1) - (1) Trading portfolio liabilities - - - - - - - - Financial liabilities designated at fair value 20 (1) - 19 64 - - 64 Net derivative financial instruments (91) - - (91) (459) - - (459) Total 214 (91) (1) 122 (106) 245 60 199 Significant unobservable inputs The following table discloses the valuation techniques and significant unobservable inputs for assets and liabilities recognised at fair value and classified as Level 3 along with the range of values used for those significant unobservable inputs: Valuation technique(s) c Significant unobservable inputs 2020 Range 2019 Range Min Max Min Max Units a Derivative financial instruments b Interest rate derivatives Discounted cash flows Inflation forwards 1 3 1 3 % Credit spread 17 1,831 41 1,620 bps Comparable pricing Price - 84 - 37 points Option model Inflation volatility 31 227 47 190 bps vol Interest rate volatility 6 489 8 431 bps vol FX - IR correlation (30) 78 (30) 78 % IR - IR correlation (20) 99 (30) 100 % Credit derivatives Discounted cash flows Credit spread 5 480 72 200 bps Comparable pricing Price - 100 - 155 points Equity derivatives Option model Equity volatility 1 110 1 200 % Equity - equity correlation (45) 100 (20) 100 % Discounted cash flow Discounted margin (225) 3,000 (500) 1,100 bps Non-derivative financial instruments Non-asset backed loans Discounted cash flows Loan spread 31 1,518 31 1,884 bps Credit spread 200 300 180 1,223 bps Price - 104 - 133 points Yield 5 8 6 12 % Comparable pricing Price - 137 - 123 points Asset backed securities Comparable pricing Price - 112 - 99 points Private equity investments EBITDA multiple EBITDA multiple 14 16 5 16 Multiple Earnings multiple Earnings multiple 3 28 - 27 Multiple Discounted cash flow Discount margin 1 10 8 10 % Corporate debt Comparable pricing Price - 127 - 100 points Other d Discounted cash flows Credit spread 146 483 126 649 bps Notes a The units used to disclose ranges for significant unobservable inputs are percentages, points and basis points. Points are a percentage of par; for example, 100 points equals 100% of par. A basis point equals 1/100th of 1%; for example, 150 basis points equals 1.5%. b Certain derivative instruments are classified as Level 3 due to a significant unobservable credit spread input into the calculation of the Credit Valuation Adjustment for the instruments. The range of significant unobserva ble credit spreads is between 17 - 1831 bps ( 2019 : 41 - 1,620 bps). c A range has not been provided for Net Asset Value as there would be a wide range reflecting the diverse nature of the positions. d Other includes commercial real estate loans . The following section describes the significant unobservable inputs identified in the table above, and the sensitivity of fair value measurement of the instruments categorised as Level 3 assets or liabilities to increases in significant unobservable inputs. Where sensitivities are described, the inverse relationship will also generally apply. Where reliable interrelationships can be identified between significant unobservable inputs used in fair value measurement, a description of those interrelation ships is included below. Forwards A price or rate that is applicable to a financial transaction that will take place in the future. In general, a significant increase in a forward in isolation will result in a fair value increase for the contracted recei ver of the underlying (currency, bond, commodity, etc.), but the sensitivity is dependent on the specific terms of the instrument. Credit spread Credit spreads typically represent the difference in yield between an instrument and a benchmark security or r eference rate. Credit spreads reflect the additional yield that a market participant demands for taking on exposure to the credit risk of an instrument and form part of the yield used in a discounted cash flow calculation. In general, a significant increa se in credit spread in isolation will result in a movement in a fair value decrease for a cash asset. For a derivative instrument, a significant increase in credit spread in isolation can result in a fair value increase or decrease depending on the specif ic terms of the instrument. Volatility Volatility is a measure of the variability or uncertainty in return for a given derivative underlying. It is an estimate of how much a particular underlying instrument input or index will change in value over time. I n general, volatilities are implied from observed option prices. For unobservable options the implied volatility may reflect additional assumptions about the nature of the underlying risk, and the strike/maturity profile of a specific contract. In general a significant increase in volatility in isolation will result in a fair value increase for the holder of a simple option, but the sensitivity is dependent on the specific terms of the instrument. There may be interrelationships between unobservable volatilities and other unobservable inputs (e.g. when equity prices fall, implied equity volatilities generally rise) but these are generally specific to individual markets and may vary over time. Correlation Correlation is a measure of the relationship b etween the movements of two variables. Correlation can be a significant input into valuation of derivative contracts with more than one underlying instrument. Credit correlation generally refers to the correlation between default processes for the separate names that make up the reference pool of a CDO structure. A significant increase in correlation in isolation can result in a fair value increase or decrease depending on the specific terms of the instrument. Comparable price Comparable instrument prices are used in valuation by calculating an implied yield (or spread over a liquid benchmark) from the price of a comparable observable instrument, then adjusting that yield (or spread) to account for relevant differences such as maturity or credit quality. A lternatively, a price-to-price basis can be assumed between the comparable and unobservable instruments in order to establish a value. In general, a significant increase in comparable price in isolation will result in an increase in the price of the unobs ervable instrument. For derivatives, a change in the comparable price in isolation can result in a fair value increase or decrease depending on the specific terms of the instrument. Loan spread Loan spreads typically represent the difference in yield betw een an instrument and a benchmark security or reference rate. Loan spreads typically reflect credit quality, the level of comparable assets such as gilts and other factors, and form part of the yield used in a discounted cash flow calculation. The ESHLA portfolio primarily consists of long-dated fixed rate loans extended to counterparties in the UK Education, Social Housing and Local Authority sectors. The loans are categorised as Level 3 in the fair value hierarchy due to their illiquid nature and the significance of unobservable loan spreads to the valuation. Valuation uncertainty arises from the long-dated nature of the portfolio, the lack of secondary market in the loans and the lack of observable loan spreads. The majority of ESHLA loans are to borrowers in heavily regulated sectors that are considered extremely low credit risk, and have a history of near zero defaults since inception . While the overall loan spread range is from 31 bps to 1,518 bps ( 2019 : 31 bps to 1,884 bps), the vast majorit y of spreads are concentrated towards the bottom end of this range, with 97 % of the loan notional being valued with spreads less than 200 bps consistently for both years. In general, a significant increase in loan spreads in isolation will result in a fair value decrease for a loan. EBITDA m ultiple EBITDA multiple is the ratio of the valuation of the investment to the earnings before interest, taxes, depreciation and amortisation. In general, a significant increase in the multiple will result in a fair value increase for an investment. Sensitivity analysis of valuations using unobservable inputs 2020 2019 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 82

Offsetting financial assets and

Offsetting financial assets and financial liabilities	12 Months Ended
	Dec. 31, 2020
18. Offsetting financial assets and financial liabilities
Offsetting of financial assets and financial liabilities	18 Offsetting financial assets and financial liabilities In accordance with IAS 32 Financial Instruments: Presentation , the Group reports financial assets and financial liabilities on a net basis on the balance sheet only if there is a legally enforceable right to set-off the recognised amounts and there is intention to settle on a net basis, or to realise the asset and settle the l iability simultaneously. The following table shows the impact of netting arrangements on:  all financial assets and liabilities that are reported net on the balance sheet  all derivative financial instruments and reverse repurchase and repurchase agreements and other similar secured lending and borrowing agreements that are subject to enforceable master netting arrangements or similar agreements, but do not qualify for balance sheet netting. The ‘Net amounts’ presented are not intended to rep resent the Group ’s actual exposure to credit risk, as a variety of credit mitigation strategies are employed in addition to netting and collateral arrangements. Amounts subject to enforceable netting arrangements Amounts not subject to enforceable netting arrangements c Balance sheet total d Effects of offsetting on-balance sheet Related amounts not offset Gross amounts Amounts offset a Net amounts reported on the balance sheet Financial instruments Financial collateral b Net amount £m £m £m £m £m £m £m £m As at 31 December 2020 Derivative financial assets 342,649 (44,305) 298,344 (233,080) (48,064) 17,200 4,102 302,446 Reverse repurchase agreements and other similar secured lending e 448,134 (306,398) 141,736 - (141,352) 384 4,911 146,647 Total assets 790,783 (350,703) 440,080 (233,080) (189,416) 17,584 9,013 449,093 Derivative financial liabilities (333,943) 41,982 (291,961) 233,080 46,804 (12,077) (8,814) (300,775) Repurchase agreements and other similar secured borrowing e (476,912) 306,398 (170,514) - 170,514 - (21,031) (191,545) Total liabilities (810,855) 348,380 (462,475) 233,080 217,318 (12,077) (29,845) (492,320) As at 31 December 2019 Derivative financial assets 260,206 (32,546) 227,660 (175,998) (38,922) 12,740 1,576 229,236 Reverse repurchase agreements and other similar secured lending e 374,274 (276,021) 98,253 - (98,253) - 2,013 100,266 Total assets 634,480 (308,567) 325,913 (175,998) (137,175) 12,740 3,589 329,502 Derivative financial liabilities (255,269) 31,180 (224,089) 175,998 38,632 (9,459) (5,115) (229,204) Repurchase agreements and other similar secured borrowing e (406,081) 276,021 (130,060) - 130,058 (2) (13,004) (143,064) Total liabilities (661,350) 307,201 (354,149) 175,998 168,690 (9,461) (18,119) (372,268) Notes a Amounts offset for d erivative financial assets additionally includes cash collateral ne tted of £ 4,990 m ( 2019 : £ 4,099 m). Amounts offset for d erivative financial liabilities additionally include s cash collateral ne tted of £ 7,313 m ( 2019 : £ 5,465 m) . Settlements assets and liabilities have been offset amounting to £ 18,143 m ( 2019 : £ 14,079 m). b Financial collateral of £ 48,064 m ( 2019 : £ 38,922 m) was received in respect of d erivative assets, including £ 43,291 m ( 2019 : £ 33,411 m) of cash collateral and £ 4,773 m ( 2019 : £ 5,511 m) of non-cash collateral. Financial collateral of £ 46,804 m ( 2019 : £ 38,632 m) was placed in respect of deri vative liabilities, including £ 42,730 m ( 2019 : £ 35,712 m) of cash collateral and £ 4,07 4 m ( 2019 : £ 2,920 m) of non-cash collateral. The collateral amounts are limited to net balance sheet exposure so as to not include overcollateralisation. c This column includes contractual rights of set-off that are subject to uncertainty under the laws of the relevant jurisdiction. d The balance sheet total is the sum of ‘Net amounts reported on the balance sheet’ that are subject to enforceable netting arrangements and ‘Amounts not subject to enforceable netting a rrangements’. e Reverse repurchase agreements and other similar secured lending of £ 146,647 m ( 2019 : £ 100,266 m) is split by fair value £ 137,616 m ( 2019 : £ 96,887 m) and amortised cost £ 9,031 m ( 2019 : £ 3,379 m). Repurchase agreements and other similar secu red borrowing of £ 191,545 m ( 2019 : £ 143,064 m) is split by fair va lue £ 177,371 m ( 2019 : £ 128,547 m) and amo rtised cost £ 14,174 m ( 2019 : £ 14,517 m). Derivative assets and liabilities The ‘Financial instruments’ column identifies financial assets and liabilities that are subject to set-off under netting agreements, such as the ISDA Master Agreement or derivative exchange or clearing counterparty agreements, whereby all outstanding transactions with the same counterparty can be offset and close-out netting applied across all outstanding transactions covered by the agreements if an event of default or other predetermined events occur. Financial col lateral refers to cash and non-cash collateral obtained, typically daily or weekly, to cover the net exposure between counterparties by enabling the collateral to be realised in an event of default or if other predetermined events occur. Repurchase and re verse repurchase agreements and other similar secured lending and borrowing The ‘Amounts offset’ column identifies financial assets and liabilities that are subject to set-off under netting agreements, such as Global Master Repurchase Agreements and Global Master Securities Lending Agreements, whereby all outstanding transactions with the same counterparty can be offset and close-out netting applied across all outstanding transactions covered by the agreements if an event of default or other predetermined e vents occur. Financial collateral typically comprises highly liquid securities which are legally transferred and can be liquidated in the event of counterparty default. These offsetting and collateral arrangements and other credit risk mitigation strateg ies used by the Group are further explained in the Credit ri sk management section .

Property, plant and equipment

Property, plant and equipment	12 Months Ended
	Dec. 31, 2020
20. Property, plant and equipment
Property, plant and equipment	20 Property, plant and equipment Accounting for property, plant and equipment The Group applies IAS 16 Property Plant and Equipment and IAS 40 Investment Properties . Property, plant and equipment is stated at cost, which includes direct and incremental acquisition costs less accumulated depreciation and provisions for impairment, if required. Subsequent costs are capitalised if these result in enhancement of the asset. Depreciation is provided on the depreciable amount of items of property, plant and equipment on a straight-line basis over their estimated useful economic lives. Depreciation rates, methods and the residual values underlying the calculation of depreciation of items of property, plant and equipment are kept under review to take account of any change in circumstances. The Group uses the following annual rates in calculating depreciation: Annual rates in calculating depreciation Depreciation rate Freehold land Not depreciated Freehold buildings and long-leasehold property (more than 50 years to run) 2-3.3% Leasehold property over the remaining life of the lease (less than 50 years to run) Over the remaining life of the lease Costs of adaptation of freehold and leasehold property 6-10% Equipment installed in freehold and leasehold property 6-10% Computers and similar equipment 17-33% Fixtures and fittings and other equipment 9-20% Costs of adaptation and installed equipment are depreciated over the shorter of the life of the lease or the depreciation rates noted in the table above. Investment property The Group initially recognises investment property at cost, and subsequently at fair value at each balance sheet date, reflecting market conditions at the reporting date. Gains and losses on remeasurement are included in the income statement. Investment property Property Equipment Leased assets Right of use assets a Total £m £m £m £m £m £m Cost As at 1 January 2020 13 3,938 2,977 9 1,826 8,763 Additions - 193 246 - 85 524 Disposals (1) (96) (100) - (14) (211) Exchange and other movements (2) (33) (41) - 37 (39) As at 31 December 2020 10 4,002 3,082 9 1,934 9,037 Accumulated depreciation and impairment As at 1 January 2020 - (1,901) (2,306) (9) (332) (4,548) Depreciation charge - (187) (223) - (231) (641) Impairment - (25) (2) - (15) (42) Disposals - 82 92 - 2 176 Exchange and other movements - 18 27 - 9 54 As at 31 December 2020 - (2,013) (2,412) (9) (567) (5,001) Net book value 10 1,989 670 - 1,367 4,036 Cost As at 1 January 2019 9 3,684 2,956 9 1,748 8,406 Additions 5 377 337 - 95 814 Disposals - (73) (251) - (10) (334) Exchange and other movements (1) (50) (65) - (7) (123) As at 31 December 2019 13 3,938 2,977 9 1,826 8,763 Accumulated depreciation and impairment As at 1 January 2019 - (1,792) (2,322) (9) (104) (4,227) Depreciation charge - (178) (229) - (226) (633) Impairment - (11) (1) - (2) (14) Disposals - 56 205 - - 261 Exchange and other movements - 24 41 - - 65 As at 31 December 2019 - (1,901) (2,306) (9) (332) (4,548) Net book value 13 2,037 671 - 1,494 4,215 Note a Right of use (ROU) asset balances relate to property leases under IFRS 16. Refer to Note 21 for further details. Property rentals of £ 11 m ( 2019 : £ 22 m) have been included in other income . The fair value of investment property is determined by reference to current market prices for similar properties, adjusted as necessary for condition and location, or by reference to recent transactions updated to reflect current economic conditions. Discounted cash flow techniques may be employed to calculate fair value where there have been no recent transactions, using current external market inputs such as market rents and interest rates. Valuations are carried out by management with the support of appropriately qualified independent value rs. Refer to Note 17 f or further details.

Leases

Leases	12 Months Ended
	Dec. 31, 2020
21. Leases
Leases	21 L eases Accounting for leases under IFRS 16 effective from 1 January 2019 IFRS 16 applies to all leases with the exception of licenses of intellectual property, rights held by licensing agree ment within the scope of IAS 38 Intangible Assets , service concession arrangements, leases of biological a ssets within the scope of IAS 41 Agriculture and leases of minerals, oil, natural gas and similar non-regenerative resources. IFRS 16 includes an accounting policy choice for a lessee to elect not to apply IFRS 16 to remaining assets within the scope of IAS 38 Intangible Assets which the Group has decided to apply. When the Group is the lessee, it is required to recognise both:  A lease liability, measured at the present value of remaining c ash flows on the lease, and  A right of use (ROU) asset, measured at the amount of the initial measurement of the lease liability, plus any lease payments made prior to commencement date, initial direct costs, and estimated costs of restoring the underlyin g asset to the condition required by the lease, less any lease incentives received. Subsequently the lease liability will increase for the accrual of interest, resulting in a constant rate of return throughout the life of the lease, and reduce when paymen ts are made. The right of use asset will amortise to the income statement over the life of the lease. The lease liability is remeasured when there is a change in one of the following:  Future lease payments arising from a change in an index or rate;  The Group ’s estimate of the amount expected to be payable under a residual value guarantee; or  The Group ’s assessment of whether it will exercise a purchase, extension or termination option. When the lease liability is remeasured , a corresponding adjus tment is made to the carrying amount of the ROU asset, or is recorded in the income statement if the carrying amount of the RO U asset has been reduced to nil. On the balance sheet, the ROU assets are included within property, plant and equipment and the lease liabilities are included within other liabilities . The Group applies the recognition exemption in IFRS 16 for leases with a term not exceeding 12 mo nths. For these leases the lease payments are recognised as an expense on a straight l ine basis over the lease term unless another systematic basis is more appropriate. When the Group is the lessor, the lease must be classified as either a finance lease or an operating lease. A finance lease is a lease which confers substantially all the risks and rewards of the leased assets on the lessee. An operating lease is a lease where substanti ally all of the risks and rewards of the leased asset remain with the lessor. When the lease is deemed a finance lease, the leased asset is not held on the balance sheet; instead a finance lease receivable is recognised representing the minimum lease pa yments receivable under the terms of the lease, discounted at the rate of interest implicit in the lease. When the lease is deemed an operating lease, the lease income is recognised on a straight-line basis over the period of the lease unless another syst ematic basis is more appropriate. The Group holds the leased assets on-balance sheet within property, plant and equipment. Accounting for finance leases under IAS 17 for 2018 Under IAS 17, a finance lease is a lease which confers substantially all t he risks and rewards of the leased assets on the lessee. Where the Group is the lessor, the leased asset is not held on the balance sheet; instead a finance lease receivable is recognised representing the minimum lease payments receivable under the te rms of the lease, discounted at the rate of interest implicit in the lease. Where the Group is the lessee, the leased asset is recognised in property, plant and equipment and a finance lease liability is recognised, representing the minimum lease paym ents payable under the lease, discounted at the rate of interest implicit in the lease. Interest income or expense is recognised in interest receivable or payable, allocated to accounting periods to reflect a constant periodic rate of return . Accounting for operating leases under IAS 17 for 2018 An operating lease under IAS 17 is a lease where substantially all of the risks and rewards of the leased assets remain with the lessor. Where the Group is the lessor, lease income is recognised on a straight-line basis over the period of the lease unless another systematic basis is more appropriate. The Group holds the leased assets on-balance sheet within property, plant and equipment. Where the Group is the lessee, rentals payable are rec ognised as an expense in the income statement on a straight-line basis over the lease term unless another systematic basis is more appropriate. As a Lessor Finance lease receivables are included within loans and advances at amortised cost. The Group specialises in the provision of leasing and other asset finance facilities across a broad range of asset types to business and individual customers . 2020 2019 Gross investment in finance lease receivables Future finance income Present value of minimum lease payments receivable Unguaranteed residual values Gross investment in finance lease receivables Future finance income Present value of minimum lease payments receivable Unguaranteed residual values £m £m £m £m £m £m £m £m Not more than one year 535 (26) 509 70 1,403 (115) 1,288 77 One to two year 312 (15) 297 45 909 (76) 833 53 Two to three year 215 (12) 203 52 593 (49) 544 45 Three to four year 107 (6) 101 27 354 (28) 326 43 Four to five year 52 (3) 49 18 123 (8) 115 19 Over five years 24 (1) 23 13 115 (17) 98 22 Total 1,245 (63) 1,182 225 3,497 (293) 3,204 259 As a part of a strategic review, Barclays Partner Finance sold its motor point of sale finance portfolio that led to a decrease in gross investment in finance lease receivables. The Group does not have any material operating leases as a lessor. The impairment allowance for finance lease receivables amounted to £ 29 m (201 9 : £ 55 m). Finance lease income Finance lease income is i ncluded within interest income. The f ollowing table shows amounts recognised in the income s tatement during the year. 2020 2019 £m £m Finance income from net investment in lease 55 141 (Loss)/profit on sales (25) 6 As a Lessee The Group leases various offices, branches and other premises under non-cancellable lease arrangements to meet its operational business requirements. In some instances, Barclays will sublease property to third parties when it is no longer needed to meet business requirements. Currently, Barclays does not have any material subleasing arrangements. ROU asset balances relate to property leases only. Refer to Note 20 for a breakdown of the carrying amount of ROU assets. The total expenses recognised during the year for short term leases were £ 4 m (2019: £ 14 m ) . The portfolio of short term leases to which Barclays is exposed at the end of the year is not dissimilar to the expenses recognised in the year . Lease liabilities 2020 2019 £m £m As at 1 January 1,563 1,696 Interest expense 70 76 New leases 85 94 Disposals (15) (19) Cash payments (306) (289) Exchange and other movements 47 5 As at 31 December (see Note 23) 1,444 1,563 The below table sets out a maturity analysis of undiscounted lease liabilities , showing the lease payments to be paid after the reporting date . Undiscounted lease liabilities maturity analysis 2020 2019 £m £m Not more than one year 255 296 One to two years 221 252 Two to three years 198 208 Three to four years 176 186 Four to five years 162 165 Five to ten years 557 565 Greater than ten years 248 310 Total undiscounted lease liabilities as at 31 December 1,817 1,982 In addition to the cash flows identified above, Barclays is exposed to:  Variable lease payments: This variability will typically arise from either inflation index instruments or market based pricing adjustments. Currently, Barclays has 809 (2019: 939 ) l eases out of the total 1,329 (2019: 1,467 ) leases which have variable lease payment terms based on market based pricing adjustments. Of the gross cash flows identified above, £ 1,096 m (2019: £ 1 ,526 m) is attributable to leases with some degree of variability predominately linked to market based pricing adjustments .  Extension and termination options: The table above represents Barclays best estimate of future cash out flows for leases, including assumptions regarding the exercising of contractual extension and termination options. The above gross cash flows have been reduced by £ 446 m (2019: £ 474 m) for leases where Barclays is highly expected to exercise an early termination option. However, there is no significant impact where Barclays is expected to exercise a n extension option. The Group currently does not have any significant sale and lease back transactions. The Group does not have any restrictions or covenants imposed by the lessor on its property leases which restrict its businesses.

Goodwill and intangible assets

Goodwill and intangible assets	12 Months Ended
	Dec. 31, 2020
22. Goodwill and intangible assets
Goodwill and intangible assets	22 Goodwill and intangible assets Accounting for goodwill and intangible assets Goodwill The carrying value of goodwill is determined in accordance with IFRS 3 Business Combinations and IAS 36 Impairment of Assets. Goodwill arising on the acquisition of subsidiaries represents the excess of the fair value of the purchase consideration over the fair value of the Group ’s share of the assets acquired and the liabilities and contingent liabilities assumed on the date of the acquisition. G oodwill is reviewed annually for impairment, or more frequently when there are indications that impairment may have occurred. The test involves comparing the carrying value of a cash generating unit (CGU) including goodwill with the present value of the pr e-tax cash flows, discounted at a rate of interest that reflects the inherent risks, of the CGU to which the goodwill relates, or the CGU’s fair value if this is higher. Intangible assets Intangible assets other than goodwill are accounted for in accordan ce with IAS 38 Intangible Assets . Intangible assets are initially recognised when they are separable or arise from contractual or other legal rights, the cost can be measured reliably and, in the case of intangible assets not acquired in a business combination, where it is probable that future economic benefits attributable to the assets will flow from their use. For internally generated intangible assets, only costs incurred dur ing the development phase are capitalised. Expenditures in the resea rch phase are expensed when it is incurred . Intangible assets are stated at cost (which is, in the case of assets acquired in a business combination, the acquisition date fair value) less accumulated amortisation and impairment, if any, and are amortised over their useful lives in a manner that reflects the pattern to which they contribute to future cash flows, generally using the amortisation periods set out below: Annual rates in calculating amortisation Amortisation period Goodwill Not amortised Internally generated software a 12 months to 6 years Other software 12 months to 6 years Customer lists 12 months to 25 years Licences and other 12 months to 25 years Intangible assets are reviewed for impairment when there are indications that impairment may have occurred . Intangible assets not yet available for use are reviewed annually for impairment. Note a Exceptions to the above rate relate to useful lives of certain core banking platforms that are assessed individually and, if appropriate, amortised over longer periods ranging from 10 to 15 years . Intangible assets Goodwill Internally generated software Other software Customer lists Licences and other Total £m £m £m £m £m £m 2020 Cost As at 1 January 2020 4,760 6,643 505 1,465 489 13,862 Additions and disposals (37) 646 131 - 22 762 Exchange and other movements (7) (42) 3 (46) (21) (113) As at 31 December 2020 4,716 7,247 639 1,419 490 14,511 Accumulated amortisation and impairment As at 1 January 2020 (861) (2,989) (279) (1,250) (364) (5,743) Disposals 37 97 10 - 3 147 Amortisation charge - (771) (51) (43) (33) (898) Impairment charge - (147) (6) - - (153) Exchange and other movements (1) 31 (2) 41 15 84 As at 31 December 2020 (825) (3,779) (328) (1,252) (379) (6,563) Net book value 3,891 3,468 311 167 111 7,948 2019 Cost As at 1 January 2019 4,768 5,835 389 1,630 558 13,180 Additions and disposals - 857 120 (124) (39) 814 Exchange and other movements (8) (49) (4) (41) (30) (132) As at 31 December 2019 4,760 6,643 505 1,465 489 13,862 Accumulated amortisation and impairment As at 1 January 2019 (861) (2,362) (254) (1,359) (371) (5,207) Disposals - 67 25 124 37 253 Amortisation charge - (716) (52) (49) (37) (854) Impairment charge - (17) (2) - - (19) Exchange and other movements - 39 4 34 7 84 As at 31 December 2019 (861) (2,989) (279) (1,250) (364) (5,743) Net book value 3,899 3,654 226 215 125 8,119 Goodwill Goodwill and Intangible assets are allocated to business operations a ccording to business segments as follows: 2020 2019 Goodwill Intangibles Total Goodwill Intangibles Total £m £m £m £m £m £m Barclays UK 3,560 1,618 5,178 3,526 1,520 5,046 Barclays International 289 2,435 2,724 329 2,686 3,015 Head Office 42 4 46 44 14 58 Total 3,891 4,057 7,948 3,899 4,220 8,119 Critical accounting estimates and judgements Goodwill Testing goodwill for impairment involves a significant amount of judgement. Goodwill is allocated to CGUs for the purpose of impairment testing. The review of goodwill for impairment involves calculating a value in use (VIU) valuation which is compared to the carrying value of a CGU associated with the goodwill to determine whether any impairment has occurred. This includes the identification of independent CGUs across the organisation and the allocation of goodwill to those CGUs. The calculation of a value in use contains a high degree of uncertainty in estimating the future cash flows and the rates used to discount them. Key judgements include determining the carrying value of the CGU, the c ash flows and discount rates used in the calculation.  The cash flow forecasts used by management involve judgement and are based upon a view of the future prospects of the business and market conditions at the point in time the assessment is prepared. Th e estimation of pre-tax cash flows is sensitive to the periods for which detailed forecasts are available and to assumptions regarding long-term sustainable cash flows.  The discount rates applied to the future cash flows also involve judgement as they can have a significant impact on the valuation. The discount rates used are compared to market participants to ensure that they are appropriate and based on an estimated cost of equity for each CGU .  The choice of a terminal growth rate used to determine the p resent value of the future cash flows of the CGUs is also a judgement that can impact the outcome of the assessment. The terminal growth rate and discount rates used may vary due to external market rates and economic conditions that are beyond management’s control. Further details of some of the key judgements are set out below. 2020 impairment review The 2020 impairment review was performed during Q4 2020. Given the change in the macroeconomic and interest rate outlook, this review was performed across all material CGUs. The review identified that a number of the CGUs have been adversely impacted by changes in their operating environment, in particular retail and business banking activity. A detailed assessment has been performed, with the approach and results of this analysis set out below. Determining the carrying value of CGU s The c arrying v alue for each CGU is the sum of the tangible equity, goodwill and intangible balances associated with that CGU. The Group manages the assets and liabilities of its CGUs with reference to tangible equity of the respective businesses. That t angible equity is derived from the level of risk weighted assets (RWAs) and capital required to be deployed in the CGU and therefore reflects its relative risk, as well as the level of capital management consider a market participant would require to hold and retain to support business growth. The goodwill held across the group has been allocated to the CGU where it originated, based upon historical records. The intangible balances are allocated to the CGUs based upon their expected usage of these assets. Cash flows The 5-year cash flows used in the calculation are based on the formally agreed medium term plans approved by the Board. These are prepared using macroeconomic assumptions which management consider reasonable and supportable, and reflect busin ess agreed initiatives for the forecast period. The macroeconomic assumptions underpinning the medium term plan were determined in August 2020 and management ha s considered whether there are subsequent significant changes in those assumptions which would a dversely impact the results of the impairment review . As required by IAS 36, all estimates of future cash flows exclude cash inflows or outflows that are expected to arise from restructuring initiatives where a constructive obligation to carry out the pla n does not yet exist. The Education, Social Housing and Local Authority (ESHLA) portfolio has been excluded from the Business Banking CGU cash flows. This is a legacy loan portfolio which was previously within the Non-Core bank and was not part of the bu siness to which the goodwill relates. As such, the cash flows relating to this portfolio have been excluded from the Business Banking VIU calculation. The Personal Banking CGU cash flows have been extended to a sixth year (prior to the calculation of te rminal values below) to reflect an observed 15 bp inflexion point in the yield curve which was beyond the period of the medium term plan. Discount rates IAS 36 requires that the discount rate used in a value in use calculation reflects the pre-tax rate a n investor would require if they were to choose an investment that would generate similar cash flows to those that the entity expects to generate from the asset. In determining the discount rate, management have identified the cost of equity associated wit h market participants that closely resemble our cash generating units and adjusted them for tax to arrive at the pre-tax equivalent rate. A range of discount rates have been used across the CGU’s ranging from 12 .0 % to 16.3 % (2019: 11.0 % to 13.3 %). Termin al growth rate The terminal growth rate is used to estimate the effect of projecting cash flows to the end of an asset’s useful economic life. It is management’s judgement that the cash flows associated with the CGUs will grow in line with the major econom ies in which we operate. In prior years, the growth rate used had been based upon estimated economic growth rates (GDP). Given macroeconomic uncertainty, inflation rates are now considered a better approximation of future growth rates and are therefore the basis of terminal growth rates applied. The terminal growth rate used is 2.0 % (2019: 1.5 %). Outcome of goodwill and intangibles review The Personal Banking and Business Banking retail banking CGUs carry the majority of the Group’s goodwill balance, predominantly as a consequence of the Woolwich acquisition. The goodwill within Personal Banking was £ 2,752 m (2019: £ 2,718 m), of which £ 2,501 m (2019: £ 2,501 m) was attributable to Woolwich, and within Business Banking was £ 629 m (2019: £ 629 m), fully attribut able to Woolwich. The outcome of the impairment review for Personal Banking and Business Banking are set out below : Cash generating unit Tangible equity Goodwill Intangibles Carrying value Value in use Value in use exceeding carrying value Value in use exceeding carrying value 2019 £m £m £m £m £m £m £m Personal Banking 4,650 2,752 1,407 8,809 8,932 123 2,570 Business Banking 1,353 629 190 2,172 2,912 740 1,981 Total 6,003 3,381 1,597 10,981 11,844 863 4,551 Based on management’s plans and assumptions the value in use exceeds the carrying value of the CGUs and no impairment has been indicated. However, the extent to which the recoverable amounts exceed the carrying values for the Personal Banking and Business Banking CGUs has reduced significantly in comparison to the 2019 impairment review, reflective of the challenging macroeconomic and interest rate outlook. I ntangible assets During the year internally generated software assets related to the discontinuation of obsolete system s resulted in these assets being impaired by £ 153 m. Sensitivity of key judgements The CGU’s are sensitive to possible adverse changes in the key assumptions that support the recoverable amount: Cash f lows: The medium te rm plans used to determine the cash flows used in the VIU calculation rely on macroeconomic forecasts, including interest rates, GDP and unemployment, and forecast levels of market and client activity. Interest rate assumptions impact planned cash flows from both customer income and structural hedge contributions and therefore cash flow expectations are highly sensitive to movements in the yield curve. The cash flows also contain assumptions with regards t o the prudential and financial conduct regulatory environment which may be subject to change. Given the current level of economic uncertainty, a 10% reduction in cash flows has been provided to show the sensitivity of the outcome to a change in these key a ssumptions. Discount rate: The discount rate should reflect the market risk free rate adjusted for the inherent risks of the business it is applied to. Management have identified discount rates for comparable businesses and consider these to be a reas onable estimate of a suitable market rate for the profile of the business unit being tested. The risk that these discount rates may not be appropriate is quantified b elow and show the impact of a 100 bps change in the discount rate. Terminal growth rate: The terminal growth rate is used to estimate the cash flows into perpetuity based on the expected longevity of the CGU’s businesses. The terminal growth rate is sensitive to uncertainties in the macroeconomic environment. The risk that using inflation dat a may not be appropriate for its determination is quantified b elow and shows the impact of 100 bps change in the terminal value. Allocated capital rate: Tangible equity is allocated based on the level of risk weighted assets (RWAs) and capital required to be deployed in the CGU which is dependent on the relative risk of businesses. The capital ratio used in determining the level of tangible equity allocated to the CGU and its capital cash flows could mo ve over time. The impact of a 5 0 bps increase in capit al ratio is quantified below. The sensitivity of the value in use to key judgements in the calculations is set out below: The se nsitivity analysis highlights that there could be an impairment in the recoverable value of the goodwill associated with Personal Banking if there were to be a change in management cash flow forecasts, discount rate or allocated capital rate . Management continue to review the recoverability of its goodwill positions as the macroeconomic conditions remain uncertain. Cash generating unit Carrying value Value in use Value in use exceeding carrying value Discount rate Terminal growth rate Reduction in headroom Change required to reduce headroom to zero 100 bps increase in the discount rate 100 bps decrease in terminal growth rate 50 bps increase to allocated capital rate 10% reduction in forecasted cash flows Discount rate Terminal growth rate Allocated capital rate Cashflows £m £m £m % % £m £m £m £m % % % % Personal Banking 8,809 8,932 123 13.51 2.0 (893) (623) (220) (972) 0.1 (0.2) 0.3 (1.3) Business Banking 2,172 2,912 740 13.81 2.0 (205) (128) (60) (206) 4.6 (9.7) 6.2 (35.9) Total 10,981 11,844 863

Other liabilities

Other liabilities	12 Months Ended
	Dec. 31, 2020
23. Other liabilities
Other liabilities	23 O ther liabilities 2020 2019 £m £m Accruals and deferred income 3,683 3,472 Other creditors 3,447 3,257 Items in the course of collection due to other banks 88 213 Lease liabilities (refer to Note 21) 1,444 1,563 Other liabilities 8,662 8,505

Provisions

Provisions	12 Months Ended
	Dec. 31, 2020
24. Provisions
Provisions	24 Provisions Accounting for provisions The Group applies IAS 37 Provisions, Contingent Liabilities and Contingent Assets in accounting for non-financial liabilities. Provisions are recognised for present obligations arising as consequences of past events where it is more likely than not that a transfer of economic benefit will be necessary to settle the obligation, which can be reliably estimated. Provision is made for the anticipated cost of restructuring, including redundancy costs , when an obligation exists; for example, when the Group has a detailed formal plan for restructuring a business and has raised valid expectations in those affected by the restructuring by announcing its main features or starting to implement the plan. Critical accounting estimates and judgements The financial reporting of provisions involves a significant degree of judgement and is complex. Identifying whether a present obligation exists and estimating the probability, timing, nature and quantum of the outflows that may arise from past events requires judgements to be made based on the specific facts and circumstances relating to individual events and often requires specialist professional advice. When matters are at an early stage, accounting jud gements and estimates can be difficult because of the high degree of uncertainty involved. Management continues to monitor matters as they develop to re-evaluate on an ongoing basis whether provisions should be recognised, however there can remain a wide r ange of possible outcomes and uncertainties, particularly in relation to legal, competition and regulatory matters, and as a result it is often not practicable to make meaningful estimates even when matters are at a more advanced stage. The complexity of such matters often requires the input of specialist professional advice in making assessments to produce estimates. Customer redress and legal, competition and regulatory matters are areas where a higher degree of professional judgement is required. The a mount that is recognised as a provision can also be very sensitive to the assumptions made in calculating it. This gives rise to a large range of potential outcomes which require judgement in determining an appropriate provision level. See below for inform ation on payment protection redress and Note 26 for more detail of legal, competition and regulatory matters. Undrawn contractually committed facilities and guarantees a Customer redress Legal, competition and regulatory matters Onerous contracts Redundancy and restructuring Payment Protection Insurance Other customer redress Sundry provisions Total £m £m £m £m £m £m £m £m As at 1 January 2020 42 143 322 1,155 420 376 306 2,764 Additions 24 194 806 - 186 106 192 1,508 Amounts utilised (13) (109) - (979) (195) (171) (118) (1,585) Unused amounts reversed (25) (60) (30) (47) (44) (45) (92) (343) Exchange and other movements - (10) (34) - 1 2 1 (40) As at 31 December 2020 28 158 1,064 129 368 268 289 2,304 Note a Und rawn contractually committed facilities and guarantees provisions are accounted for under IFRS 9. Provisions expected to be recovered or settled within no more than 12 months after 31 December 2020 were £ 1,751 m ( 2019 : £ 2, 457 m). Onerous contracts Onerous contract provisions comprise an estimate of the costs involved with fulfilling the terms and conditions of contracts net of any expected benefits to be received. Redundancy and restructuring These provisions comprise the estimated cost of restructuring, including redundancy costs where an obligation exists. Additions made during the year relate to formal restructuring plans and have either been utilised, or reversed, where total costs are now expected to be l ower than the original provision amount. Undrawn contractually committed facilities and guarantees Impairment allowance under IFRS 9 considers both the drawn and the undrawn counterparty exposure. For retail portfolios, the total impairment allowance is allocated to the drawn exposure to the extent that the allowance does not exceed the exposure as ECL is not reported separately. Any excess is reported on the liability side of the balance sheet as a provision. For wholesale portfolios, the impairment allo wance on the undrawn exposure is reported on the liability side of the balance sheet as a provision. For further information, refer to Credit r isk section for loan commitments and financial guarantees on page 119 . Customer redress Customer redress provis ions comprise the estimated cost of making redress payments to customers, clients and counterparties for losses or damages associated with inappropriate judgement in the execution of the Group ’ s business activities. Other than Payment Protection Insurance, there are no significant individual customer redress provisions at 31 December 2020. Legal, competition and regulatory matters The Group is engaged in various legal proceedings, both in the UK and a number of other overseas jurisdictions, including the U S. For further information in relation to legal proceedings and discussion of the associated uncertainties, refer to Note 26 . Sundry provisions This category includes provisions that do not fit into any of the other categories, such as fraud lo sses and dilapidation provisions. Payment Protection Insurance (PPI) r edress As at 31 December 2020 Barclays had recognised cumulative provisions totalling £ 10.9 bn (December 2019: £ 11 bn) , including a £ 55 m release in Q4 2020 on resolution of the items received in Q3 2019 and claims from the Official Receiver with whom we reached agreement in Q3 2020 , against the cost of PPI redress and associated processing costs. Utilisation of the cumulative provisions to date is £ 10.8 bn (December 2019: £ 9.8 bn), leavi ng a residual provision of £ 0.1 bn (December 2019: £ 1.2 bn) to be utilised in 2021. This represents Barclays best estimate as at 31 December 2020 based on information available.

Contingent liabilities and comm

Contingent liabilities and commitments	12 Months Ended
	Dec. 31, 2020
25. Contingent liabilities and commitments
Contingent liabilities and commitments	25 Contingent liabilities and commitments Accounting for contingent liabilities Contingent liabilities are possible obligations whose existence will be confirmed only by uncertain future events, and present obligations where the transfer of economic resources is uncertain or cannot be reliably measured. Contingent liabilities are not recognised on the balance sheet but are disclosed unless the likelihood of an outflow of economic resources is remote. The following table summarises the n ominal principal amount of contingent liabilities and commitments which are not recorded on-balance sheet: 2020 2019 £m £m Guarantees and letters of credit pledged as collateral security 15,665 17,606 Performance guarantees, acceptances and endorsements 5,944 6,921 Total contingent liabilities 21,609 24,527 Of which: Financial guarantees carried at fair value 229 43 Documentary credits and other short-term trade related transactions 1,086 1,291 Standby facilities, credit lines and other commitments 331,963 333,164 Total commitments 333,049 334,455 Of which: Loan commitments carried at fair value 9,269 17,679 Expected credit losses held against contingent liabilities and commitments equal £ 1,064 m ( 2019 : £ 322 m) and are reported in Note 24 . Further details on contingent liabilities relating to legal and competition and regulatory matters can be found in Note 26 .

Legal, competition and regulato

Legal, competition and regulatory matters	12 Months Ended
	Dec. 31, 2020
26. Legal, competition and regulatory matters
Legal, competition and regulatory matters	26 Legal, competition and regulatory matters The Group face s 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 as described in Note 24, Provi sions. 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 c ertain 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 a re disclosed. 1. Barclays PLC and Barclays Bank PLC Investigations into c ertain advisory services a greements and related civil action FCA proceedings In 2008, Barclays Bank PLC and Qatar Holdings LLC entered into two advisory service agreements (the Agreements). The Financial Conduct Authority (FCA) conducted an investigation into whether the Agreements may have related to Barclays PLC’s capital raisings in June and November 2008 (the Capital Raisings) and therefore should have been disclosed in the a nnouncements or public documents relating to the Capital Raisings. In 2013, the FCA issued warning notices (the Notices) finding that Barclays PLC and Barclays Bank PLC acted recklessly and in breach of certain disclosure-related listing rules, and that Ba rclays PLC was also in breach of Listing Principle 3. The financial penalty provided in the Notices is £50m. Barclays PLC and Barclays Bank PLC continue to contest the findings. Following the conclusion of the Serious Fraud Office (SFO) proceedings against certain former Barclays executives resulting in their acquittals, the FCA proceedings, which were stayed, have resumed. All charges brought by the SFO against Barclays PLC and Barclays Bank PLC in relation to the Agreements were dismissed in 2018. Civil action PCP Capital Partners LLP and PCP International Finance Limited (PCP) are seeking damages of up to approximately £819m from Barclays Bank PLC for fraudulent misrepresentation and deceit, arising from alleged statements made by Barclays Bank PLC to P CP in relation to the terms on which securities were to be issued to potential investors, allegedly including PCP, in the November 2008 capital raising. The trial took place in 2020 and the High Court has indicated that judgment is imminent. The outcome of the judgment, and any financial im pact on the Group, is unknown. Barclays Bank PLC is defending the claim. Investigations into LIBOR and other b enchmarks and related civil actions Regulators and law enforcement agencies, including certain competition authorities, from a number of governments have conducted investigations relating to Barclays Bank PLC’s involvement in allegedly manipulating certain financial benchmarks, such as LIBOR. The SFO closed its investigation with no action to be taken against t he Group. 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 majo rity 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 o ther 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 R acketeer Influenced and Corrupt Organizations Act (RICO), the Securities Exchange Act of 1934 and various state laws by manipulating USD LIBOR rates. Putative class actions and individual actions seek unspecified damages with the exception of three lawsui ts, in which the plaintiffs are seeking a combined total of approximately $900m in actual damages and additional punitive damages against all defendants, including Barclays Bank PLC. Some of the lawsuits also seek trebling of damages under the Antitrust Ac t and RICO. Barclays Bank PLC has previously settled certain claims. Two class action settlements where Barclays Bank PLC has respectively paid $7.1m and $20m have received final court approval. 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 defe ndants’ motion to dismiss the claims was granted in 2018. The plaintiffs have appealed the dismissal. Japanese Yen LIBOR civil actions In 2012, a putative class action was filed in the SDNY against Barclays Bank PLC and other Japanese Yen LIBOR panel bank s by a lead plaintiff involved in exchange-traded derivatives and members of the Japanese Bankers Association’s Euroyen Tokyo Interbank Offered Rate (Euroyen TIBOR) panel. The complaint alleges, among other things, manipulation of the Euroyen TIBOR and Yen LIBOR rates and breaches of the CEA and the Antitrust Act. In 2014, the court dismissed the plaintiff’s antitrust claims, and, in 2020, the court dismissed the plaintiff’s remaining CEA claims. The plaintiff has appealed the lower court’s dismissal of su ch claims. In 2015, a second putative class action, making similar allegations to the above class action, was filed in the SDNY against Barclays PLC, Barclays Bank PLC and BCI. The plaintiffs filed an amended complaint in 2020, and the defendants have fil ed a motion to dismiss. SIBOR/SOR civil action In 2016, a putative class action was filed in the SDNY against Barclays PLC, Barclays Bank PLC, BCI and other defendants, alleging manipulation of the Singapore Interbank Offered Rate (SIBOR) and Singapore S wap Offer Rate (SOR). In 2018, the court dismissed all claims against Barclays PLC, Barclays Bank PLC and BCI. The plaintiffs have appealed the dismissal. ICE LIBOR civil actions In 2019, several putative class actions were filed in the SDNY against Barclays PLC, Barclays Bank PLC, BCI, other financial institution defendants and Intercontinental Exchange Inc. and certain of its affiliates (ICE), asserting antitrust claims that defendants manipulated USD LIBOR through defendants’ submissions to ICE. Th ese actions have been consolidated. The defendants’ motion to dismiss was granted in 2020. The plaintiffs have appealed the dismissal. In August 2020, an ICE LIBOR-related action was filed 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. Non-US benchmarks civil actions Legal proceedings (which include the claims referred to below in ‘Local authority civil actions concerning LIBOR’) have been brought or threatened against Barclays Bank PLC (and, in certain cases, Barclays Bank UK PLC) in the UK in connection with alleged manipulation of LIBOR, EURIBOR and other benchmarks. Proceedings have also been brought in a nu mber of other jurisdictions in Europe and Israel. Additional proceedings in other jurisdictions may be brought in the future. F oreign E xchange i nvestigations and related civil actions In 2015, the Group reached settlements totalling approximately $2.38bn with various US federal and state authorities and the FCA in relation to investigations into certain sales and trading practices in the Foreign Exchange market. Under the related plea agreement with the US Department of Justice (DoJ), which receive d final court approval in January 2017, the Group agreed to a term of probation of three years, which expired in January 2020. The Group also continues to provide relevant information to certain authorities. The European Commission is one of a number of a uthorities still conducting an investigation into certain trading practices in Foreign Exchange markets. The European Commission announced two settlements in May 2019 and the Group paid penalties totalling approximately €210m. In June 2019, the Swiss Compe tition Commission announced two settlements and the Group paid penalties totalling approximately CHF 27m. The financial impact of the ongoing matters is not expected to be material to the Group’s operating results, cash flows or financial position. Variou s 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. FX opt out civil action In 2018, Barclays Bank PLC and BCI settled a consolidated action filed in the SDNY, alleging manipulation of Foreign Exchange markets (Consolidated FX Action), for a total amount of $384m. Also in 2018, a group of plaintiffs who opted out of the Consolidated FX Action filed a complaint in the SDNY against Barclays PLC, Barclays Bank PLC, BCI and other defendants. Some of the plaintiff’s claims were dismissed in 2020. 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 Consoli dated FX Action. The Court subsequently dismissed all Retail Basis Claims against the Group and all other defendants. The plaintiffs have filed an amended complaint. State law FX civil action In 2017, the SDNY dismissed consolidated putative class action s brought under federal and various state laws on behalf of proposed classes of (i) stockholders of Exchange Traded Funds and others who purportedly were indirect investors in FX instruments, and (ii) investors who traded FX instruments through FX dealers or brokers not alleged to have manipulated Foreign Exchange Rates. Barclays Bank PLC and BCI have settled the claim, which has received final court approval. T he financial impact of the settlement is not material to the Group’s operating results, cash flow s or financial position . 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 i n the UK, a number of other jurisdictions in Europe, Israel and Australia and additional proceedings may be brought in the future. These include two purported class actions filed against Barclays PLC, Barclays Bank PLC, BX, BCI and other financial instit utions in the UK Competition Appeal Tribunal in 2019 following the settlements with the European Commission described above. Also in 2019, a separate claim was filed in the UK in the High Court of Justice by various banks and asset management firms against Barclays Bank PLC and other financial institutions alleging breaches of European and UK competition laws related to FX trading. Metals investigations and related civil actions Barclays Bank PLC previously provided information to the DoJ, the US Commodit y Futures Trading Commission and other authorities in connection with investigations into metals and metals-based financial instruments. A number of US civil complaints, each on behalf of a proposed class of plaintiffs, have been consolidated and transfe rred to the SDNY. The complaints allege that Barclays Bank PLC and other members of The London Gold Market Fixing Ltd. manipulated the prices of gold and gold derivative contracts in violation of the Antitrust Act and other federal laws. This consolidated putative class action remains pending. A separate US civil complaint by a proposed class of plaintiffs against a number of banks, including Barclays Bank PLC, BCI and BX, alleging manipulation of the price of silver in violation of the CEA, the Antitrust A ct and state antitrust and consumer protection laws, has been dismissed as against the Barclays entities. The plaintiffs have the option to seek the court’s permission to appeal. 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 actions There are various pending civil actions relating to US Res idential Mortgage-Backed Securities (RMBS), including four actions 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 a nd/or a subsidiary acquired in 2007 (the Acquired Subsidiary). The unresolved repurchase requests had an original principal balance of approximately $2.1bn. The Trustees have also alleged that the relevant R&Ws may have been breached with respect to a grea ter (but unspecified) amount of loans than previously stated in the unresolved repurchase requests. These repurchase actions are ongoing. In one repurchase action, the New York Court of Appeals held that claims related to certain R&Ws are time-barred. Ba rclays Bank PLC has reached a settlement to resolve two of the repurchase actions, which is subject to final court approval. T he financial impact of the settlement is not expected to be material to the Group’s operating results, cash flows or financial pos ition. The remaining two repurchase actions are pending. In 2020, a c ivil litigation claim was filed in the New Mexico First Judicial District Court by the State of New Mexico against seven banks, including BCI, on behalf of two New Mexico state pension funds and the New Mexico State Investment Council relating to legacy RMBS purchases. As to BCI, the complaint alleges that the funds purchased approximately $22m in RMBS underwritten by BCI . The plaintiffs have asserted claims under New Mexico state law, w hich provides for the ability to claim treble damages and civil penalties. Government and agency securities civil actions and related matters Certain governmental authorities have conducted investigations into activities relating to the trading of certain government and agency securities in various markets. The Group provided information in cooperation with such investigations. In January 2021, the Mexican Competition Authority concluded its investigation into activities relating to the trading of M exican government bonds and granted Barclays Bank Mexico S.A. immunity from fines. Civil actions have also been filed on the basis of similar allegations, as described below. 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 secu rities market and/or (ii) conspired to prevent the creation of certain platforms by boycotting or threatening to boycott such trading platforms. The defendants have filed a motion to dismiss. In addition, certain plaintiffs have filed a related, direct ac tion 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. Supranational, Sovereign and Agency bond s civil actions Civil antitrust actions have been filed in the SDNY and Federal Court of Canada in Toronto against Barclays Bank PLC, BCI, BX, Barclays Capital Securities Limited and, with respect to the civil action filed in Canada only, 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. In one of the actions filed in the SDNY, the co urt granted the defendants’ motion to dismiss the plaintiffs’ complaint, which the plaintiffs have appealed. The plaintiffs have voluntarily dismissed the other SDNY action. 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 re set on a periodic basis, most commonly weekly. Two actions in state court have been filed by private plaintiffs on behalf of the states of Illinois and California. Two putative class action complaints, which have been consolidated, have been filed in the S DNY. In the SDNY class action, certain of the plaintiff’s claims were dismissed in November 2020. Government bond civil actions In a putative class action filed in the SDNY in 2019, plaintiffs alleged that BCI and certain other bond dealers conspired to f ix the prices of US government sponsored entity bonds in violation of US antitrust law. BCI agreed to a settlement of $87m, which received final court approval in 2020. Separately, various entities in Louisiana, including the Louisiana Attorney General and the City of Baton Rouge, have commenced litigation against Barclays Bank PLC and other financial institutions making similar allegations as the SDNY class action plaintiffs . In 2018, a separate putative class action against various financial institutions including Barclays PLC, Barclays Bank PLC, BCI, Barclays Bank Mexico, S.A., and certain other subsidiaries of the Group was consolidated in the SDNY. The plaintiffs asserted antitrust and state law claims arising out of an alleged conspiracy to fix the pr ices of Mexican Government bonds. Barclays PLC has settled the claim for $5.7m, which is subject to final court approval. Odd-lot corporate bonds antitrust class action In 2020, BCI, together with other financial institutions, were named as defendants i n a putative class action. The complaint alleges a conspiracy to boycott developing electronic trading platforms for odd-lots and price fixing. Plaintiffs demand unspecified money damages. The defendants have filed a motion to dismiss. Interest rate swa p 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 class actions which were co nsolidated in the SDNY in 2016. The complaints allege the defendants conspired to prevent the development of exchanges for IRS and demand unspecified money damages. In 2018, trueEX LLC filed an antitrust class action in the SDNY against a number of financial institutions including Barclays PLC, Barclays Bank PLC and BCI based on similar allegations with respect to trueEX LLC’s development of an IRS platform. In 2017, Tera Group Inc. filed a separate civil antitrust action in the SDNY claiming that certain conduct alleged in the IRS cases also caused the plaintiff to suffer harm with respect to the Credit Default Swaps market. In 2018 and 2019, respectively, the court dismissed certai n claims in both cases for unjust enrichment and tortious interference but denied motions to dismiss the federal and state antitrust claims, which remain pending. BDC Finance L.L.C. In 2008, BDC Finance L.L.C. (BDC) filed a complaint in the NY Supreme Co urt, 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 (collectively, the Agreement). Following a trial, the court ruled in 2018 tha t Barclays Bank PLC was not a defaulting party, which was affirmed on appeal. In October 2020, the trial court granted Barclays Bank PLC’s motion for summary judgment on its counterclaims against BDC. BDC has appealed . In 2011, BDC’s investment advisor, B DCM Fund Adviser, L.L.C. and its parent company, Black Diamond Capital Holdings, L.L.C. also sued Barclays Bank PLC and BCI in Connecticut State Court for unspecified damages allegedly resulting from Barclays Bank PLC’s conduct relating to the Agreement, a sserting claims for violation of the Connecticut Unfair Trade Practices Act and tortious interference with business and prospective business relations. This case is currently stayed. Civil a ctions in r espect of the US Anti-Terrorism Act There are a number of civil actions, on behalf of more than 4,000 plaintiffs, 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 gene rally allege that Barclays Bank PLC and those banks engaged in a conspiracy to facilitate US dollar-denominated transactions for the Government of Iran and various Iranian banks, which in turn funded acts of terrorism that injured or killed plaintiffs or p laintiffs’ 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’ motion to di smiss three actions in the EDNY. Plaintiffs have appealed in one action. The court also granted the defendants’ motion to dismiss another action in the SDNY. The remaining actions are stayed pending decisions in these cases. Shareholder derivative action 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 Barclays PLC, alleging that the individual defendants harmed the company through breaches of their duties under the Companies Act 2006. The plaintiff seeks damages for the losses that Barclays PLC allegedly suffered. 2. Barclays PLC, Barclays Bank PLC and Barclays Bank UK PLC In vestigation into collections and recoveries relating to unsecured lending Since 2018, the FCA has been investigating whether the Group implemented effective systems and controls with respect to collections and recoveries and whether it paid due consideration to the interests of customers in default and arrears. In December 2020, Barclays Bank UK PLC and Barclays Bank PLC settled with the FCA and agreed to pay a total penalty of £26m. Investigation into UK card s’ affordability The FCA is investigating certain aspects of the affordability assessment processes used by Barclays Bank UK PLC and Barclays Bank PLC for credit card applications made to Barclays’ UK credit card business. Barclays is providing information in cooperation with the investigation. HM Revenue & Customs (HMRC) assessments concerning UK Value Added Tax In 2018, HMRC issued notices that have the effect of removing certain overseas subsidiaries that have operations in the UK from Barclays’ UK VAT group, in which group supplies between members are generally free from VAT. The notices have retrospective effect and correspond to assessments of £181m (inclusive of interest), of which Barclays would expect to attribute an amount of approximately £128m to Barclays Bank UK PLC and £53 m to Barclays Bank PLC. HMRC ’ s decision has been appealed to the First Tier Tribunal (Tax Chamber). Local authority civil actions concerning LIBOR Following settlement by Barclays Bank PLC of various governmental investigations concerning certain benchmark interest rate submissions referred to above in ‘Investigations into LIBOR and other benchmarks and related civil actions’, in the UK, certain local authorities have brought claims against Barclays Bank PLC and Barclays Bank UK PLC asserting that they entered into loans in reliance on misrepresentations made by Barclays Bank PLC in respect of its conduct in relation to LIBOR. Barclays Bank PLC and Barclays Bank UK PLC have applied to strike out the claims. 3. Barclays PLC Alternative trading systems Barclays PLC has been named as a defendant in a claim brought in the UK in the High Court of Justice 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. The NYAG complaint was filed against Barclays PLC and BCI in the Supreme Court of the State of New York alleging, among other things, that Barclays PLC and BCI engaged in fraud and d eceptive practices in connection with LX, BCI’s SEC-registered alternative trading system. Such claim was settled in 2016, as previously disclosed. This new shareholder claim is seeking unquantified damages, although Barclays PLC has not yet been served. 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, debt collection, consumer credit, fraud, trusts, client assets, competition, data management and protection, intellectual property, money launderin g, 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, compliance with legislation and regulation, wholesale trading activity and other areas of banking and business activities in which the Group is or has been engage d. 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 ul timate 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 assura nce 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 flow for a particular period, depending on, a mong other things, the amount of the loss resulting from the matter(s) and the amount of profit otherwise reported for the reporting period.

Subordinated Liabilities

Subordinated Liabilities	12 Months Ended
	Dec. 31, 2020
27. Subordinated liabilities
Subordinated Liabilities	27 Subordinated liabilities Accounting for subordinated liabilities Subordinated liabilities are measured at amortised cost using the effective interest method under IFRS 9. 2020 2019 £m £m As at 1 January 18,156 20,559 Issuances 1,438 1,352 Redemptions (3,464) (3,248) Other 211 (507) As at 31 December 16,341 18,156 Issuances of £ 1,438 m comprise £ 782 m USD 3.564% Fixed Rate Resetting Subordinated Callable Notes and £ 500 m 3.75% Fixed Rate Resetting Subordinated Callable Notes , both issued externally by Barclays P LC and £ 156 m USD Floating Rate Notes issued externally by a Barclays subsidiary. Redemptions of £3,464 m comprise a £ 1,126 m partial redemption of USD 7.625% Contingent Capital Notes issued externa lly by Barclays Bank PLC and full redemptions of £ 1,124 m EUR 2.625% Fixed Rate Subordi nated Callable Notes issued ext ernally by Barclays PLC, £ 842 m USD 5.14% Lower Tier 2 Notes issued externally by Barclays Bank PLC and £ 342 m USD Floating Rate Notes and £ 30 m USD Fixed Rate Notes , both issued externally by Barclays s ubsidiaries. Other movements predominantly include fore ign exchange movements and fair value hedge adjustments. Subordinated liabilities include accrued interest and compris e undated and dated subordinated liabilities as follows: 2020 2019 £m £m Undated subordinated liabilities 308 303 Dated subordinated liabilities 16,033 17,853 Total subordinated liabilities 16,341 18,156 None of the Group’s subordinated liabilities are secured. Undated subordinated liabilities a 2020 2019 Initial call date £m £m Barclays Bank PLC issued Tier One Notes (TONs) 6% Callable Perpetual Core Tier One Notes 2032 17 16 6.86% Callable Perpetual Core Tier One Notes (USD 179m) 2032 205 203 Reserve Capital Instruments (RCIs) 5.3304% Step-up Callable Perpetual Reserve Capital Instruments 2036 56 53 Undated Notes Junior Undated Floating Rate Notes (USD 38m) Any interest payment date 28 29 Total undated subordinated liabilities 308 303 Note a Instrument values are disclosed to the nearest million . Undated subordinated liabilities Undated subordinated liabilities are issued by Barclays Bank PLC and its subsidiaries for the development and expansion of the business and to strengthen the capital bases. The principal terms of the undated subordinated liabilities are described below: Subordination All undated subordinated liabilities rank behind the claims against the bank of depositors and other unsecured unsubordinated creditors and holders of dated subordinated liabilities in the following order: Ju nior Undated Floating Rate Notes; followed by TONs and RCIs ranking pari passu with each other. Interest The Junior Undated Notes are floating rate notes where rates are fixed periodically in advance based on the related market rate. The TONs and RCIs be ar a fixed rate of interest until the initial call date. After the initial call date, in the event that they are not redeemed, the TONs and RCIs will bear interest at rates fixed periodically in advance based on market rates. Payment of interest No paymen t of principal or any interest may be made in relation to the TONs and RCIs unless Barclays Bank PLC satisfies a specified solvency test. Barclays Bank PLC may elect to defer any payment of interest on the RCIs. Any such deferred payment of interest must be paid on the earlier of: (i) the date of redemption of the RCIs, and (ii) the coupon payment date falling on or nearest to the tenth anniversary of the date of deferral of such payment. Whilst such deferral is continuing, (i) neither Barclays Bank PLC nor Barclays PLC may declare or pay a dividend, subject to certain exceptions, on any of its ordinary shares or preference shares and (ii) certain restrictions on the redemption, purchase or reduction of their respective share capital and certain other securities also apply. Barclays Bank PLC may elect to defer any payment of interest on the TONs if it determines that it is, or such payment would result in it being, in non-compliance with capital adequacy requirements and policies of the PRA. Any such deferre d payment of interest will only be payable on a redemption of the TONs. Until such time as Barclays Bank PLC next makes a payment of interest on the TONs, (i) neither Barclays Bank PLC nor Barclays PLC may declare or pay a dividend, subject to certain exceptions , on any of their respective ordinary shares or preference shares, or make payments of interest in respect of Barclays Bank PLC’s Reserve Capital Instruments and (ii) certain restrictions on the redemption, purchase or reduction of their respective s hare capital and certain other securities also apply. Repayment All undated subordinated liabilities are repayable at the option of Barclays Bank PLC, generally in whole, at the initial call date and on any subsequent coupon or interest payment date. In addition, each issue of undated subordinated liabilities is repayable, at the option of Barclays Bank PLC in whole for certain tax reasons, either at any time, or on an interest payment date. There are no events of default except non-payment of principal o r mandatory interest. Any repayments require the prior consent of the PRA. Other All issues of undated subordinated liabilities are non-convertible. Dated subordinated liabilities a 2020 2019 Initial call date Maturity date £m £m Barclays PLC issued 2.625% Fixed Rate Subordinated Callable Notes (EUR 1,250m) 2020 2025 - 1,072 2% Fixed Rate Subordinated Callable Notes (EUR 1,500m) 2023 2028 1,384 1,309 4.375% Fixed Rate Subordinated Notes (USD 1,250m) 2024 990 995 3.75% Fixed Rate Resetting Subordinated Callable Notes (SGD 200m) 2025 2030 119 116 3.75% Fixed Rate Resetting Subordinated Callable Notes (GBP 500m) 2025 2030 504 - 5.20% Fixed Rate Subordinated Notes (USD 2,050m) 2026 1,610 1,561 4.836% Fixed Rate Subordinated Callable Notes (USD 2,000m) 2027 2028 1,627 1,578 5.088% Fixed-to-Floating Rate Subordinated Callable Notes (USD 1,500m) 2029 2030 1,213 1,152 3.564% Fixed Rate Resetting Subordinated Callable Notes (USD 1,000m) 2030 2035 703 - Barclays Bank PLC issued 5.14% Lower Tier 2 Notes (USD 1,094m) 2020 - 832 6% Fixed Rate Subordinated Notes (EUR 1,500m) 2021 1,427 1,375 9.5% Subordinated Bonds (ex-Woolwich Plc) 2021 221 239 Subordinated Floating Rate Notes (EUR 100m) 2021 90 85 10% Fixed Rate Subordinated Notes 2021 2,108 2,157 10.179% Fixed Rate Subordinated Notes (USD 1,521m) 2021 1,101 1,123 Subordinated Floating Rate Notes (EUR 50m) 2022 45 43 6.625% Fixed Rate Subordinated Notes (EUR 1,000m) 2022 982 957 7.625% Contingent Capital Notes (USD 3,000m) 2022 1,132 2,284 Subordinated Floating Rate Notes (EUR 50m) 2023 45 42 5.75% Fixed Rate Subordinated Notes 2026 351 350 5.4% Reverse Dual Currency Subordinated Loan (JPY 15,000m) 2027 108 105 6.33% Subordinated Notes 2032 64 62 Subordinated Floating Rate Notes (EUR 68m) 2040 61 58 External issuances by other subsidiaries 2025 146 358 Total dated subordinated liabilities 16,033 17,853 Note a I nstrument values are disclosed to the nearest million . Dated subordinated liabilities Dated subordinated liabilities are issued by Barclays PLC, Barclays Bank PLC and its subsidiaries for the development and expansion of their business and to strengthen their respective capital bases. The principal terms of the dated subordinated liabilities are described below: Subordination Dated subordinated liabilities issued by Barclays PLC ranks behind the claims against Barclays PLC of unsecured unsubordinated creditors but before the claims of the holders o f its equity. All dated subordinated liabilities externally issued by Barclays Bank PLC rank behind the claims against the bank of depositors and other unsecured unsubordinated creditors but before the claims of the undated subordinated liabilities and th e holders of its equity. The dated subordinated liabilities externally issued by other subsidiaries are similarly subordinated as the external subordinated liabilities issued by Barclays Bank PLC. Interest Interest on the Floating Rate Notes is fixed peri odically in advance, based on the related market rates. Interest on Fixed Rate Notes is set by reference to market rates at the time of issuance and fixed until maturity. Interest on the 4.836% Fixed Rate Subordinated Callable Notes, 2% Fixed Rate Subor dinated Callable Notes 3.75% SGD Fixed Rate Resetting Subordinated Callable Notes , 3 .75% GBP Fixed Rate Resetting Subordinated Callable Notes and the 3.564% Fixed Rate Resetting Subordinated Callable Notes are fixed until the call date. After the respectiv e call dates, in the event that they are not redeemed, the interest rates will be reset and fixed until maturity based on a market rate. Interest on the 5.088% Fixed-to-Floating Rate Subordinated Callable Notes are fixed until the call date. After the call date, in the event that they are not redeemed, the interest rate will reset periodically in advance based on market rates. Repayment Those subordinated liabilities with a call date are repayable at the option of the issuer, on conditions governing the respective debt obligations, some in whole or in part, and some only in whole. The remaining dated subordinated liabilities outstanding at 31 December 2020 are redeemable only on maturity, subject in particular cases to provisions allowing an early redemptio n in the event of certain changes in tax law, or to certain changes in legislation or regulations. Any repayments prior to maturity require, in the case of Barclays PLC and Barclays Bank PLC, the prior consent of the PRA, or in the case of the overseas i ssues, the approval of the local regulator for that jurisdiction and of the PRA in certain circumstances. There are no committed facilities in existence at the balance sheet date which permit the refinancing of debt beyond the date of maturity. Other The 7.625% Contingent Capital Notes will be automatically transferred from investors to Barclays PLC (or another entity within the Group) for nil consideration in the event the Barclays PLC transitional CET1 ratio falls below 7%.

Ordinary shares, share premium,

Ordinary shares, share premium, and other equity	12 Months Ended
	Dec. 31, 2020
28. Ordinary shares, share premium, and other equity
Ordinary shares, share premium, and other equity	28 Ordinary shares, share premium, and other equity Called up share capital, allotted and fully paid Number of shares Ordinary share capital Ordinary share premium Total share capital and share premium Other equity instruments m £m £m £m £m As at 1 January 2020 17,322 4,331 263 4,594 10,871 Issued to staff under share incentive plans 37 9 34 43 - AT1 securities issuance - - - - 1,142 AT1 securities redemption - - - - (831) Other movements - - - - (10) As at 31 December 2020 17,359 4,340 297 4,637 11,172 As at 1 January 2019 17,133 4,283 28 4,311 9,632 Issued to staff under share incentive plans 76 19 82 101 - Issuances relating to Scrip Dividend Programme 113 29 153 182 - AT1 securities issuance - - - - 3,500 AT1 securities redemption - - - - (2,262) Other movements - - - - 1 As at 31 December 2019 17,322 4,331 263 4,594 10,871 Called up share capital Called up share capital comprises 17,359 m ( 2019 : 17,322 m) ordinary shares of 25 p each. Share repurchase At the 2020 AGM on 7 May 20 20 , Barclays PLC was authorised to repurchase up to an aggregate of 1,733 m of its ordinary shares of 25 p. The authorisation is effective until the AGM in 2021 or the close of business on 30 June 2021 , whichever is the earlier . No share repurchases were made during either 2020 or 2019 . Other equity instruments Other equity instruments of £ 11,172 m ( 2019 : £ 10,871 m) include AT1 securities issued by Barclays PLC. The AT1 securities are perpetual securities with no fixed maturity and are structured to qualify as AT1 instruments under prevailing capital rules applicable as at the relevant issue date . In 2020 , there w as one issuance of AT1 instruments, in the form of Fixed Rate Resetting Perpetual Subordinated Conting ent Convertible Securities ( 2019 : three issuance s ), totalling £ 1,142 m ( 2019 : £ 3,500 m ) which includes issuance cost s of £ 4 m ( 2019 : £ 11 m) . There w as also one redemption in 2020 ( 2019 : three redemption s ), totalling £ 831 m ( 2019 : £ 2,262 m) . AT1 equity instruments 2020 2019 Initial call date £m £m AT1 equity instruments - Barclays PLC 8.0% Perpetual Subordinated Contingent Convertible Securities (EUR 1,000m) 2020 - 830 7.875% Perpetual Subordinated Contingent Convertible Securitiesª 2022 986 995 7.875% Perpetual Subordinated Contingent Convertible Securities (USD 1,500m) 2022 1,131 1,131 7.25% Perpetual Subordinated Contingent Convertible Securities 2023 1,245 1,245 7.75% Perpetual Subordinated Contingent Convertible Securities (USD 2,500m) 2023 1,925 1,925 5.875% Perpetual Subordinated Contingent Convertible Securities 2024 1,244 1,244 8% Perpetual Subordinated Contingent Convertible Securities (USD 2,000m) 2024 1,509 1,509 7.125% Perpetual Subordinated Contingent Convertible Securitiesª 2025 994 996 6.375% Perpetual Subordinated Contingent Convertible Securities 2025 996 996 6.125% Perpetual Subordinated Contingent Convertible Securities (USD 1,500m) 2025 1,142 - Total AT1 equity instruments 11,172 10,871 Note a R eported net of securities held by the Group . The principal terms of the AT1 securities are described below:  AT1 securities rank behind the claims against Barclays PLC of 1) unsubordinated creditors; 2) claims which are expressed to be subordinated to the claims of unsubordinated creditors of Barclays PLC but not further or otherwise; or 3) claims which are, or are expressed to be, junior to the claims of other creditors of Barclays PLC, whether subordinated or unsubordinated, other than claims which rank, or are expressed to rank, pari passu w ith, or junior to, the claims of holders of the AT1 securities.  AT1 securities are undated and are redeemable, at the option of Barclays PLC, in whole on (i) the initial call date, or on any fifth anniversary after the initial call date or (ii) any day fal ling in a named period ending on the initial reset date, or on any fifth anniversary after the initial reset date. In addition, the AT1 securities are redeemable, at the option of Barclays PLC, in whole in the event of certain changes in the tax or regulat ory treatment of the securities. Any redemptions require the prior consent of the PRA.  AT1 securities bear a fixed rate of interest until the initial call date or the initial reset date, as the case may be. After the initi al call date or the initial reset date, as the case may be, in the event that they are not redeemed, the AT1 securities will bear interest at rates fixed periodically in advance for five-year periods based on market rates.  Interest on the AT1 securities will be due and payable only at the s ole discretion of Barclays PLC, and Barclays PLC has sole and absolute discretion at all times and for any reason to cancel (in whole or in part) any interest payment that would otherwise be payable on any interest payment date. All AT1 securities will be converted into ordinary shares of Barclays PLC, at a pre-determined price, should the fully loaded CET1 ratio of t he Group fall below 7 % .

Reserves

Reserves	12 Months Ended
	Dec. 31, 2020
29. Reserves
Reserves	29 Reserves Currency translation reserve The currency translation reserve represents the cumulative gains and losses on th e retranslation of the Group’s net investment in foreign operations, net of the effects of hedging. Fair value through other comprehensive income reserve The fair value through other comprehensive income reserve represent s the changes in the fair value of fair value through other comprehensive income investments since initial recognition. Cash flow hedging reserv e The cash flow hedging reserve represents the cumulative gains and losses on effective cash flow hedging instruments that will be recycled to profit or loss when the hedged transactions affect profit or loss. Own credit r eserve 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. Other reserves and treasury shares Other reserves relate to redeemed ordina ry and preferenc e shares issued by the Group. Treasury shares relate to Barclays PLC shares held in relation to the Group’s various share schemes. These schemes are described in Note 32 . Treasury shares are deducted from shareho lders’ equity within other reserves. A transfer is made to retained earnings in line with the vesting of treasury shares held for the purposes of share-based payments. 2020 2019 £m £m Currency translation reserve 2,871 3,344 Fair value through other comprehensive income reserve 5 (187) Cash flow hedging reserve 1,575 1,002 Own credit reserve (954) (373) Other reserves and treasury shares 964 974 Total 4,461 4,760

Non-controlling interests

Non-controlling interests	12 Months Ended
	Dec. 31, 2020
30. Non-controlling interests
Non-controlling interests	30 Non-controlling interests Profit attributable to non-controlling interest Equity attributable to non-controlling interest Dividends paid to non-controlling interest 2020 2019 2020 2019 2020 2019 £m £m £m £m £m £m Barclays Bank PLC issued: – Preference shares 42 41 529 529 42 41 – Upper Tier 2 instruments 37 39 533 691 37 39 Other non-controlling interests (1) - 23 11 - - Total 78 80 1,085 1,231 79 80 In 2020 , there were no issuances (2019: none ) and one redemption of £ 158 m (2019: none ) relating to the 7.125% Undated Subordinated Notes . Barclays Bank PLC and protective rights of non-controlling interests Barclays PLC holds 100 % of the voting rights of Barclays Bank PLC. As at 31 December 2020, Barclays Bank PLC has in issue preference shares and Upper Tier 2 instruments. These are non-contro lling interests to the Group. A fixed coupon rate is attached to all Upper Tier 2 instruments until the initial call date, with the exception of the 9% Bonds, which are fixed for the life of the issue and the Series 1, Series 2 and Series 3 Undated Notes, which are floating rate at rates fixed periodically in advance based on market rates. After the initial call date, in the event they are not redeemed, coupon pa yments in relation to the 6.125% Undated Notes, and the 9.25% Bonds are fixed periodically in advance for five-year periods based on market rates. Coupon payments for all other Upper Tier 2 instruments are at rates fixed periodically in advance based on market rates. The payment of preference share dividends and Upper Tier 2 coupons are typically at the discretion of Barclays Bank PLC, except for coupon payments that become compulsory where Barclays PLC has declared or paid a dividend on ordinary shares, or in certain cases, any class of preference shares, in the preceding six-month period. Barclays Bank PLC is not obliged to make a payment of interest on its 9.25% Perpetual Subordinated Bond s if, in the immediately preceding 12 month interest period, a dividend has not been paid on any class of its share capital. Coupons not paid becomes payable in each case if such a dividend is subsequently paid or in certain other circumstances. No dividen d or coupon payments may be made unless Barclays Bank PLC satisfies a specified solvency test. Under the terms of these instruments, Barclays PLC may not pay dividends on ordinary shares until a dividend or coupon is next paid on these instruments or the i nstruments are redeemed or purchased by Barclays Bank PLC. There are no restrictions on Barclays Bank PLC’s ability to remit capital to the Parent as a result of these issued instruments. Preference share redemptions are typically at the discretion of Bar clays Bank PLC. Upper Tier 2 instruments are repayable, at the option of Barclays Bank PLC generally in whole at the initial call date and on any subsequent coupon payment dat e or, in the case of the 6.125% Undated Notes and the 9.25% Perpetual Bonds, on a ny fifth anniversary after the initial call date. In addition, each issue of Upper Tier 2 instruments is repayable, at the option of Barclays Bank PLC, in whole for certain tax reasons, either at any time, or on an interest payment date. There are no event s of default except non-payment of principal or mandatory interest. Any repayments or redemptions require the prior consent of the PRA , and in respect of the preference shares, any such redemption will be subject to the Companies Act 2006 and the Articles of Barclays Bank PLC . 2020 2019 Instrument £m £m Preference Shares: US Dollar Preference Shares 318 318 Euro Preference Shares 211 211 Total Barclays Bank PLC Preference Shares 529 529 Upper Tier 2 Instruments: Undated Floating Rate Primary Capital Notes Series 1 93 93 Undated Floating Rate Primary Capital Notes Series 2 179 179 5.03% Undated Reverse Dual Currency Subordinated Loan (JPY8bn) 39 39 5.0% Reverse Dual Currency Undated Subordinated Loan (JPY12bn) 53 53 Undated Floating Rate Primary Capital Notes Series 3 (£145m) 20 20 9% Permanent Interest Bearing Capital Bonds (£100m) 40 40 7.125% Undated Subordinated Notes (£525m) - 158 6.125% Undated Subordinated Notes (£550m) 34 34 9.25% Perpetual Subordinated Bonds (ex Woolwich) (£150m) 75 75 Total Upper Tier 2 Instruments 533 691

Staff costs

Staff costs	12 Months Ended
	Dec. 31, 2020
31. Staff costs
Staff costs	31 Staff costs Accounting for staff costs The Group applies IAS 19 Employee benefits in its accounting for most of the components of staff costs. Short-term employee benefits – salaries, accrued performance costs and social security are recognised over the period in which the employees provide the services to which the payments relate. Performance costs – recognised to the extent that the Group has a present obligation t o its employees that can be measured reliably and are recognised over the period of service that employees are required to work to qualify for the payments. Deferred cash and share awards are made to employees to incentivise performance over the period em ployees provide services. To receive payment under an award, employees must provide service over the vesting period. The period over which the expense for deferred cash and share awards is recognised is based upon the period employees consider their servic es contribute to the awards. For past awards, the Group considers that it is appropriate to recognise the awards over the period from the date of grant to the date that the awards vest. In relation to awards granted from 2017, the Group , taking i nto account the changing employee understanding surrounding those awards, considered it appropriate for expense to be recognised over the vesting period including the financial year prior to the grant date. The accounting policies for share-based paymen ts, and pensions and other post-retirement benefits are included in Note 32 and Note 33 respectively. 2020 2019 2018 £m £m £m Incentive awards granted: Current year bonus 1,090 1,058 1,131 Deferred bonus 490 432 518 Total incentive awards granted 1,580 1,490 1,649 Reconciliation of incentive awards granted to income statement charge: Less: deferred bonuses granted but not charged in current year (335) (293) (359) Add: current year charges for deferred bonuses from previous years 293 308 299 Other differences between incentive awards granted and income statement charge (34) (48) (33) Income statement charge for performance costs 1,504 1,457 1,556 Other income statement charges: Salaries 4,322 4,332 4,200 Social security costs 613 573 558 Post-retirement benefits a 519 501 619 Other compensation costs 479 480 413 Total compensation costs b 7,437 7,343 7,346 Other resourcing costs: Outsourcing 342 433 594 Redundancy and restructuring 102 132 133 Temporary staff costs 102 256 386 Other 114 151 170 Total other resourcing costs 660 972 1,283 Total staff costs 8,097 8,315 8,629 Notes a Post-retirement benefits charge includes £ 279 m (201 9 : £ 270 m; 201 8 : £ 2 36 m) in respect of defined contribution schemes and £ 240 m (201 9 : £ 231 m; 201 8 : £ 383 m) in respect of defined benefit schemes . b £ 451 m ( 2019 : £ 439 m; 201 8 : £ 296 m) of Group compensation was capitalised as internally generated software.

Share-based payments

Share-based payments	12 Months Ended
	Dec. 31, 2020
32. Share-based payments
Share-based payments	32 Share-based payments Accounting for share-based payments The Group applies IFRS 2 Share-based Payments in accounting for employee remuneration in the form of shares. Employee incentives include awards in the form of shares and share options, as well as offering employees the opportunity to purchase shares on favourable terms. The cost of the employee services received in respect of the shares or share options granted is recognised in the income statement over the period that employees provide services . The overall cost of the award is calculated using the number of shares and options expected to vest and the fair value of the shares or options at the date of grant. The number of shares and options expected to vest takes into account the likelihood that performance and service conditions included in the terms of the awards will be met. Failure to meet the non-vesting condition is treated as a cancellation, resulting in an acceleration of recognition of the cost of the employee services . The fair value of shares is the market price ruling on the grant date, in some cases adjusted to reflect restrictions on transferability. The fair value of options granted is determined using option pricing models to estimate the numbers of shares likel y to vest. These take into account the exercise price of the option, the current share price, the risk-free interest rate, the expected volatility of the share price over the life of the option and other relevant factors. Market conditions that must be met in order for the award to vest are also reflected in the fair value of the award, as are any other non-vesting conditions – such as continuing to make payments into a share-based savings scheme. The charge for the year arising from share-based payment schemes was as follows: Charge for the year 2020 2019 2018 £m £m £m Deferred Share Value Plan and Share Value Plan 245 272 262 Others 184 206 187 Total equity settled 429 478 449 Cash settled 2 3 1 Total share-based payments 431 481 450 The terms of the main current plans are as follows: Share Value Plan (SVP) The SVP was introduced in March 2010 . SVP awards have been granted to participants in the form of a conditional right to receive Barclays PLC shares or provisional allocations of Barclays PLC shares which vest or are considered for release over a period of three, five or seven years. Participants do not pay to receive an award or to receive a release of shares. For awards granted before December 2017, t he grantor may also make a di vidend equivalent payment to participants on release of a SVP award. SVP awards are also made to eligible employees for recruitment purposes. All awards are subject to potential forfeiture in certain leaver scenarios. Deferred Share Value Plan (DSVP) The DSVP was introduced in February 2017. The terms of the DSVP are materially the same as the terms of the SVP as described above, save th at E xecutive Directors are not eligible to participate in the DSVP and the DSVP operates ov er market purchase shares only . Other schemes In addition to the SVP and DSVP, the Barclays Group operates a number of other schemes settled in Barclays PLC Shares including Sharesave (both UK and Ireland), Sharepurchase (both UK and overseas), and the Barclays Group Long Term Incent ive Plan. A delivery of upfront shares to ‘Material Risk Takers’ can be made as a Share Incentive Award (Holding Period) . Share option and award plans The weighted average fair value per award granted, weighted average share price at the date of exercise/ release of shares during the year, weighted average contractual remaining life and number of options and awards outstanding (including those exercisable) at the balance sheet date were as follows: 2020 2019 Weighted average fair value per award granted in year Weighted average share price at exercise/release during year Weighted average remaining contractual life Number of options/ awards outstanding Weighted average fair value per award granted in year Weighted average share price at exercise/release during year Weighted average remaining contractual life Number of options/ awards outstanding £ £ in years (000s) £ £ in years (000s) DSVP and SVP a,b 1.06 1.24 1 416,941 1.43 1.60 1 331,491 Others a 0.23-1.24 1.04-1.68 0-3 356,033 0.40-1.60 1.57-1.70 0-3 232,259 Notes a Options/award granted over Barclays PLC shares. b Weighted average exercise price is not applicable for SVP and DSVP awards as these are not share option schemes. SVP and DSVP are nil cost awards on which the performance conditions are substantially completed at the date of grant. Consequently, the fair value of these awards is based on the market value at that date . Sharesave has a contractual life of 3 and 5 years , the expected volatility is 32.17 % for 3 years and 30.32 % for 5 years . The risk free interest rates used for valuations are 0.02 % and 0.08 % for 3 and 5 years respectively. Movements in options and awards The movement in the number of options and awards for the major s chemes and the weighted average exercise price of options was : DSVP and SVP a,b Others a,c Number (000s) Number (000s) Weighted average ex. price (£) 2020 2019 2020 2019 2020 2019 Outstanding at beginning of year/acquisition date 331,491 274,469 232,259 217,952 1.29 1.41 Granted in the year 232,379 219,392 365,166 215,694 0.84 1.19 Exercised/released in the year (132,376) (145,324) (123,042) (151,827) 1.22 1.21 Less: forfeited in the year (14,553) (17,046) (105,068) (42,331) 1.24 1.51 Less: expired in the year - - (13,282) (7,229) 1.35 2.08 Outstanding at end of year 416,941 331,491 356,033 232,259 0.96 1.29 Of which exercisable: - - 30,833 32,376 1.66 1.32 Notes a Options/award granted over Barclays PLC shares. b Weighted average exercise price is not applicable for SVP and DSVP awards as these are not share option schemes. c The number of awards within Others at the end of the year principally relates to Sharesave (number of awards exercisable at end of year was 11 , 677 , 049 ). The weighted average exercise price relates to Sharesave. Awards and options granted under the Group’s share plans may be satisfied using new issue shares, treasury shares and market purchase shares. Awards granted under the DSVP may be satisfied using market purchase shares only. There were no significant modifications to the share-ba sed payments arrangements in 2020 and 201 9 . As at 31 December 2020 , the total liability arising from cash-settled share-based payments transactions was £ 2 m (2019: £ 3 m). Holdings of Barclays PLC shares and hedges Various employee be nefit trusts established by the G roup hold shares in Barclays PLC to meet obligations under the Barclay s share-based payment schemes. The total number of Barclays shares held in these employee b enefit trusts at 31 Decem ber 2020 was 17.1 m (201 9 : 13.1 m). Dividend rights have been waived on all these shares. The total market value of the shares held in trust based on the year end share price of £ 1.27 (201 9 : £ 1.80 ) was £ 22 m (201 9 : £ 24 m ) . For accounting of treasury shares , se e Note 29 . The Group has entered into physically settled forward contracts to hedge the settlement of certain share-based payment schemes. The fixed forward price to be paid under these contracts is £ 126 m and has been recorded in retained earnings.

Pension and post-retirement ben

Pension and post-retirement benefits	12 Months Ended
	Dec. 31, 2020
33. Pension and post-retirement benefits
Pension and post-retirement benefits	33 Pensions and post-retirement benefits Accounting for pensions and post-retirement benefits The Group operates a number of pension schemes and post-employment benefit schemes. Defined contribution schemes – the Group recognises contributions due in respect of the accounting period in the income statement. Any contributions unpaid at the balance sheet date are included as a liability. Defined benefit schemes – the Group recognises its obligations to members of ea ch scheme at the period end, less the fair value of the scheme assets after applying the asset ceiling test. Each scheme’s obligations are calculated using the projected unit credit method. Scheme assets are stated at fair value as at the period end. Ch anges in pension scheme liabilities or assets (remeasurements) that do not arise from regular pension cost, net interest on net defined benefit liabilities or assets, past service costs, settlements or contributions to the scheme, are recognised in other c omprehensive income. Remeasurements comprise experience adjustments (differences between previous actuarial assumptions and what has actually occurred), the effects of changes in actuarial assumptions, return on scheme assets (excluding amounts included in the interest on the assets) and any changes in the effect of the asset ceiling restriction (excluding amounts included in the interest on the restriction). Post-employment benefit schemes – the cost of providing healthcare benefits to retired employees i s accrued as a liability in the financial statements over the period that the employees provide services to the Group , using a methodology similar to that for defined benefit pension schemes. Pension schemes UK Retirement Fund (UKRF) The UKRF is the Group’s main scheme, r epresenting 97 % of the Group’s total retirement benefit obligations. Barclays Bank PLC is the principal employer of the UKRF. The UKRF was closed to new entrants on 1 October 2012, and comprises 10 sections , the two most significant of which are:  Afterwork , which comprises a contributory cash balance defined benefit element, and a voluntary defined contribution element. The cas h balance element is accrued each year and revalued until Normal Retirement Age in line with the increase in Retail Price I ndex (RPI) (up to a maximum of 5% p.a.) . An increase of up to 2 % a year may also be added at Barclays’ discretion. The costs of ill-h ealth retirements and death in service benefits for Afterwork members are borne by the UKRF. The main risks that Bar clays runs in relation to Afterwork are limited although additional contributions are required if pre-retirement investment returns are not sufficient to provide for the benefits.  The 1964 Pension Scheme. Most employees recruited before July 1997 built up benefits in this non-contributory defined benefit scheme in respect of service up to 31 March 2010 . Pensions were calculated by reference t o service and pensionable salary. From 1 April 2010, members became eligible to accrue future service benefits in either Afterwork or the Pension Investment Plan (PIP), a historic defined contribution section which is now closed to future contributions. Th e risks that Barclays runs in relation to the 1964 section are typical of final salary pension schemes, principally that investment returns fall short of expectations, that inflation exceeds expectations, and that retirees live longer than expected. Barcl ays Pension Savings Plan (BPSP) The BPSP is a defined contribution scheme providing benefits for all ne w UK hires from 1 October 2012, BPSP is not subject to the same investment return , inflation or life expectancy risks for Barclays that defined benefit s chemes are. Members’ benefits reflect contributions paid and the level of investment returns achieved. Other Apart from the UKRF and the BPSP, Barclays operates a number of smaller pension and long-term employee benefits and post-retirement healthcare plans globally, the largest of which are the US defined benefit schemes. Many of the schemes are funded , with assets backing the obligations held in separate legal vehicles such as trusts. Others are operated on an unfunded basis. The benefits provided, t he approach to funding, and the legal basis of the schemes, reflect local environments. Governance The UKRF operates under trust law and is managed and administered on behalf of the members in accordance with the terms of the Trust Deed and Rules and all relevant legislation. The Corporate Trustee is Barclays Pension Funds Trustees Limited, a private limited company and a wholly owned subsidiary of Barclays Bank PLC. The Trustee is the legal owner of the assets of the UKRF which are held separately fro m the assets of the Group . The Trustee Board comprises six Management Directors selected by Barclays, of whom three are independent Directors with no relationship with Barclays (and who are not members of the UKRF), plus three Member Nominated Directors selected from eligible active staff , deferred and pensioner members who apply for the role. The BPSP is a Group Personal Pension arrangement which operates as a collection of personal pension plans. Each personal pension plan is a direct contract between t he employee and the BPSP provider (Legal & General Assurance Society Limited), and is regulated by the FCA. Similar principles of pension g overnance apply to the Group’s other pension schemes, depending on local legislation. Amounts recognised The following tables include amounts recognised in the income statement and an analysis of benefit obligations and scheme assets for all Group defined benefit schemes. The net position is reconciled to the assets and liabilities recognised on the balance sheet. The tables include funded and unfunded post-retirement benefits. Income statement charge 2020 2019 2018 £m £m £m Current service cost 243 231 243 Net finance cost (40) (48) (24) Past service cost (4) - 134 Other movements 1 2 5 Total 200 185 358 Balance sheet reconciliation 2020 2019 Total Of which relates to UKRF Total Of which relates to UKRF £m £m £m £m Benefit obligation at beginning of the year (30,333) (29,304) (28,269) (27,301) Current service cost (243) (217) (231) (210) Interest costs on scheme liabilities (573) (549) (747) (718) Past service cost 4 - - - Remeasurement (loss)/gain – financial (3,439) (3,358) (3,087) (2,964) Remeasurement (loss)/gain – demographic (281) (286) 223 214 Remeasurement (loss)/gain – experience 244 237 277 266 Employee contributions (5) (1) (5) (1) Benefits paid 1,406 1,370 1,459 1,410 Exchange and other movements 30 - 47 - Benefit obligation at end of the year (33,190) (32,108) (30,333) (29,304) Fair value of scheme assets at beginning of the year 32,093 31,362 29,722 29,036 Interest income on scheme assets 613 595 795 774 Employer contribution 265 248 755 731 Remeasurement – return on scheme assets greater than discount rate 3,411 3,328 2,312 2,230 Employee contributions 5 1 5 1 Benefits paid (1,406) (1,370) (1,459) (1,410) Exchange and other movements (268) (249) (37) - Fair value of scheme assets at end of the year 34,713 33,915 32,093 31,362 Net surplus 1,523 1,807 1,760 2,058 Retirement benefit assets 1,814 1,807 2,108 2,058 Retirement benefit liabilities (291) - (348) - Net retirement benefit assets 1,523 1,807 1,760 2,058 Included withi n the benefit obligation was £ 867 m ( 2019 : £ 759 m) relat ing to overseas pensions and £ 215 m ( 2019 : £ 202 m) relating to other post-employment benefits. As at 31 December 2020 , the UKRF’s scheme assets were in surplus versus IAS 19 obligations by £ 1,807 m ( 2019 : £ 2,058 m). The movement for the UKRF was driven by a net decrease in the discount rate and changes to pension increase assumptions, offset partially by higher than assumed asset returns . During the year the UKRF invested in non-transferable listed senior gilt-backed notes for £750m, partially financed by £500m deficit contributions (the “Heron 2” transaction). The net impact of £250m on plan assets is shown as an outflow under “Exchange and other movements”; further details o f Heron 2 can found on page [xx] . The weighted average duration of the benefit payments reflected in the defined ben efit obliga tion for the UKRF is 17 years . The UKRF expected benefits are projected to be paid out for in excess of 50 years , although 25 % of the total benefits are expected to be paid in the next 10 years; 30 % in years 11 to 20 and 25 % in years 20 to 30. T he remainder of the benefits are expect ed to be paid beyond 30 years. Of the £ 1,370 m ( 2019 : £ 1,410 m) UKRF benefits paid out, £ 520 m ( 2019 : £ 580 m) related to transfer s out of the fund . Where a scheme’s assets exceed its obligation, an asset is recognised to the extent that it does not exceed the present value of future contribution holidays or refunds of contributions (the asset ceiling). In the case of the UKRF the asset ceiling is not applied as, in certain specified circumstances such as wind-up, the Group expects to be able to recover any surplus. Similarly, a liability in respect of future minimum funding requirements is not recognised. The Trustee does not have a substantive right t o augment benefits, nor do they have the right to wind up the plan except in the dissolution of the Group or termination o f contributions by the Group. The application of the asset ceiling to other plans and recognition of additional liabilities in respect of future minimum funding requirements are considered on an individual plan basis. Critical accounting estimates and judgements Actuarial valuation of the schemes’ obligation is dependent upon a series of assumptions. Below is a summary of the main financial and demographic assumptions adopted for the UKRF. 2020 2019 Key UKRF financial assumptions % p.a. % p.a. Discount rate 1.29 1.92 Inflation rate (RPI) 2.99 3.02 The UKRF discount rate assumption for 2020 was based on a standard Willis Towers Watson RATE Link model. The UKRF discount rate assumption for 2019 was based on a variant of the standard Willis Towers Watson RATE Link model that included all bonds rated AA by at least one of the four major ratings agencies, and assumed that forward rates after year 30 were fla t. The change in discount rate methodology as at 31 December 2020 led to a remeasurement gain of £ 1.2 bn . The RPI inflation assumption for 2020 was set by reference to the Bank of England’s implied inflation curve. The inflation assumption incorporates a deduction of 20 basis points as an allowance for an i nflation risk premium. The methodology used to derive the inflation assumptions is consistent with that used at the prior year end . The UKRF’s post-retirement mortality assumptions are based on a best estimate assumption derived from an analysis in 201 9 of the UKRF’s own post-retirement mortality experience, and taking account of recent evidence fro m published mortality surveys. An allowance has been made for future mortality improvements based on the 201 9 core projection model published by the Continuous Mortality Investigation Bureau su bject to a long-term trend of 1.5 % per annum in future improvements. The methodology used is cons istent with the prior year end , except that the 201 8 core projection model was used at 201 9 . The table below shows how the assumed life expectancy at 60, for members of the UKRF, has varied over the past three years: Assumed life expectancy 2020 2019 2018 Life expectancy at 60 for current pensioners (years) – Males 27.2 27.1 27.7 – Females 29.4 29.3 29.4 Life expectancy at 60 for future pensioners currently aged 40 (years) – Males 29.0 28.9 29.2 – Females 31.2 31.1 31.0 On 11 December 2020, the UKRF entered into a £ 5 bn longevity swap to hedge around a quarter of current pensioner liabilities against unexpected increases in life expectancy. The swap will form part of the UKRF’s investment portfolio and provide income in the event that pensions are paid out for longer than expected. The UKRF Trustee established a Guernsey based captive insurer (Barclays UKRF No.1 IC Limited) to act as an insurance intermediary between the UKRF and swap provider. The swap is not included di rectly within the balance sheet of Barclays PLC as it is an asset of the UKRF. At 31 December 2020, the swap is valued at nil fair value as it is considered to remain at fair market value for both parties over the very limited period from 11 December 2020 to 31 December 2020 . Sensitivity analysis on actuarial assumptions The sensitivity analysis has been calculated by valuing the UKRF liabilities using the amended assumptions shown in the table below and keeping the remaining assumptions the same as disclosed in the table above, except in the case of the inflation sensitivity where other assumptions that depend on assumed inflation have also been amended correspondingly. The difference between the recalculated liability figure and that stated in the balance sheet reconcilia tion table above is the figure shown. The selection of these movements to illustrate the sensitivity of the defined benefit obligation to key assumptions should not be interpreted as Barclays expressing any specific view of the probability of such movement s happening. Change in key assumptions 2020 2019 (Decrease)/ Increase in UKRF defined benefit obligation (Decrease)/ Increase in UKRF defined benefit obligation £bn £bn Discount rate 0.5% p.a. increase (2.5) (2.3) 0.25% p.a. increase (1.3) (1.2) 0.25% p.a. decrease 1.4 1.2 0.5% p.a. decrease 2.9 2.6 Assumed RPI 0.5% p.a. increase 1.8 1.5 0.25% p.a. increase 0.9 0.8 0.25% p.a. decrease (0.9) (0.7) 0.5% p.a. decrease (1.8) (1.4) Life expectancy at 60 One year increase 1.2 1.0 One year decrease (1.2) (1.0) Assets A long-term investment strategy has been set for the UKRF, with its asset allocation comprising a mixture of equities, bonds, property and other appropriate assets. This recognises that different asset classes are likely to produce different long-term returns and some asset classes may be more volatile than others . The long-term investment strategy ensures, among other aims, that investments are ade quately diversified . The UKRF also employs derivative instruments, where appropriate, to achiev e a desired exposure or return, or to match assets more closely to liabilities. The value of assets shown reflects the assets held by the scheme, with any derivative holdings reflected on a fair value basis. The value of the assets o f the schemes and their percentage in relation to total scheme assets were as follows : Analysis of scheme assets Total Of which relates to UKRF Quoted a £m Unquoted a £m Value £m % of total fair value of scheme assets % Quoted a £m Unquoted a £m Value £m % of total fair value of scheme assets % As at 31 December 2020 Equities 567 1,498 2,065 5.9 378 1,498 1,876 5.5 Private equities - 2,233 2,233 6.4 - 2,233 2,233 6.6 Bonds - fixed government 4,205 110 4,315 12.4 3,932 110 4,042 11.9 Bonds - index-linked government 10,706 1,014 11,720 33.8 10,697 1,014 11,711 34.6 Bonds - corporate and other 7,439 1,678 9,117 26.3 7,214 1,678 8,892 26.2 Property 10 1,416 1,426 4.1 - 1,416 1,416 4.2 Infrastructure - 1,812 1,812 5.2 - 1,812 1,812 5.3 Cash and liquid assets 64 1,830 1,894 5.5 46 1,830 1,876 5.5 Mixed investment funds 9 - 9 - - - - - Other 14 108 122 0.4 - 57 57 0.2 Fair value of scheme assets 23,014 11,699 34,713 100.0 22,267 11,648 33,915 100.0 As at 31 December 2019 b Equities 942 1,568 2,510 7.8 768 1,568 2,336 7.4 Private equities - 2,083 2,083 6.5 - 2,083 2,083 6.6 Bonds - fixed government 3,574 300 3,874 12.1 3,303 299 3,602 11.5 Bonds - index-linked government 10,355 681 11,036 34.4 10,345 682 11,027 35.2 Bonds - corporate and other 6,260 2,297 8,557 26.6 6,069 2,295 8,364 26.7 Property 11 1,633 1,644 5.1 - 1,633 1,633 5.2 Infrastructure - 1,558 1,558 4.9 - 1,558 1,558 5.0 Cash and liquid assets 596 170 766 2.4 576 169 745 2.4 Mixed investment funds - - - - - - - - Other - 65 65 0.2 - 14 14 - Fair value of scheme assets 21,738 10,355 32,093 100.0 21,061 10,301 31,362 100.0 Notes a Valuations on unquoted assets are provided by the underlying managers or qualified independent valuers. Valuations on complex instruments are based on UKRF custodian valuations. All valuations are determined in accordance with relevant industry guidance. b Analysis of scheme assets for 2019 is restated with a quoted/unquoted split. Included within the fai r value of scheme assets were nil ( 2019 : n il ) relating to shares in Barclays PLC and nil ( 2019 : n il ) relating to bonds issued by Barclays PLC. The UKRF also invests in pooled investment vehicles which may hold shares or debt issued by Barclays PLC. The UKRF assets above do not include the Senior Notes asset referred to in the section below on Triennial Valuation, as these are non-transfera ble instrument s and not recognised under IAS 19 . Approximately 45 % of the UKRF assets are invested in liability-driven investment strategies; primarily UK gilts as well as interest rate and inflation swaps. These are used to better match the assets to its liabilities. The swaps are used to reduce the scheme’s inflation and duration risks against its liabilities. Triennial valuation The latest annual update as at 30 September 2020 showed the funding deficit had improved to £ 0.9 bn from the £ 2.3 bn shown at the 30 September 2019 triennial valuation. The improvement was mainly due to £ 1.0 bn of deficit reduction contributions paid over the year. The main differences between the funding and accounting assumptions are a different approach to setting the discount rate and a more conservative longevity assumption for funding. The deficit reduction contributions agre ed with the UKRF Trustee as part of the 30 September 2019 triennial valuation recovery plan are show n in the table below. Deficit reduction contributions under the 30 September 2019 valuation Year £m Cash paid: 2020 500 Future commitments: 2021 700 2022 294 2023 286 2024 - 2026 - On 12 June 2020, Barclays Bank PLC paid the £ 500 m deficit reduction contribution agreed for 2020 and at the same time the UKRF subscribed for non-transferrable listed senior fixed rate notes for £ 750 m, backed by UK gilts (the Senior Notes). These Senior Notes entitle the UKRF to semi-annual coupon payments for five years, and full repayment in cash in three equal tranches in 2023, 2024, and at final maturity in 2025. The Senior Notes were issued by Heron Issuer Number 2 Limited (Heron 2), an entity that i s consolidated within the Group under IFRS 10. As a result of the investment in Senior Notes, the regulatory capital impact of the £ 500 m deficit reduction contribution paid on 12 June 2020 takes effect in 2023, 2024 and 2025 on maturity of the notes. As th e UKRF's investment in the Senior Notes does not qualify as a plan asset under IAS 19, the £500m deficit reduction contribution does not appear in the IAS19 plan assets nor as an employer contribution as at 31 December 2020, and the additional £250m scheme investment appears as an outflow in the balance sheet reconciliation under 'Exchange and other movements’. The £ 250 m additional investment by the UKRF in the Senior Notes has a positive capital impact in 2020 which is reduced equally in 2023, 2024 and 202 5 on the maturity of the notes. Heron 2 acquired a total of £ 750 m of gilts from Barclays Bank PLC for cash to support payments on the senior notes. A transaction with a similar structure was agreed as part of the 2019 triennial actuarial valuation. On 11 D ecember 2019, Barclays Bank PLC paid the £ 500 m deficit reduction contribution agreed for 2019 and at the same time the UKRF subscribed for non-transferrable listed senior fixed rate notes for £ 500 m, backed by UK gilts (the Senior Notes). These Senior Notes entitle the UKRF to semi-annual coupon payments for five years, and full repayment in cash at maturity in 2024. As the UKRF's investment in these Senior Notes does not qualify as a plan asset under IAS 19, the 2019 £500m deficit reduction contribution doe s not a ppear in the IAS 19 plan assets. No liability is recognised under IAS 19 for the obligation to make deficit reduction contributions or to repay the Senior Notes, as settlement gives rise to both a reduction in cash and a corresponding increase in net defined benefit assets. The deficit reduction contributions are in addition to the regular con tributions to meet the Group’s share of the cost of benefits accruing over each year. The next funding valuation of the UKRF is due to be completed in 202 3 with a n effective date of 30 September 20 22 . Other support measures agreed which remain in place Collateral – The UKRF Trustee and Barclays Bank PLC have entered into an arrangement whereby a collateral po ol has been put in place to provide security for the UKRF funding deficit as it increases or decreases over time. The collateral pool is currently made up of government securities, and agreement was made with the Trustee to cover at least 100 % of the fundi ng deficit with an overa ll cap of £ 9 bn. The arrangement provides the UKRF Trustee with dedicated access to the pool of assets in the event of Barclays Bank PLC not paying a deficit reduction contribution to the UKRF or in the event of B arclays Bank PLC’s i nsolvency. These assets are included within Note 38 Assets pledged, collateral received and assets transferred . Support from Barclays PLC – In the event of Barclays Bank PLC not paying a deficit reduction contribution payment required by a specified pre-p ayment date, Barclays PLC has entered into an arrangement whereby it will be required to use, in first priority, dividends received from Barclays Bank UK PLC (if any) to invest the proceeds in Barclays Bank PLC (up to the maximum amount of the deficit redu ction contribution unpaid by Barclays Bank PLC). The proceeds of the investment will be used to discharge Barclays Bank PLC’s unpaid deficit reduction contribution. Participation – As permitted under the Financial Services and Markets Act 2000 (Banking Re form) (Pensions) Regulations 2015, Barclays Bank UK PLC is a participating employer in the UKRF and will remain so during a transitional phase until September 2025 as set out in a deed of participation. Barclays Bank UK PLC will make contributions for the future service of its employees who are currently Afterwork members and, in the event of Barclays Bank PLC’s insolvency during this period provision has been made to require Barclays Bank UK PLC to become the principal employer of the UKRF. Barclays Bank P LC’s Section 75 debt would be triggered by the insolvency (the debt would be calculated after allowing for the payment to the UKRF of the collateral above). D efined benefit contributions paid with respect to the UKRF were as follows: Contributions paid £m 2020 748 2019 1,231 2018 741 There were nil ( 2019 : nil ; 2018 : nil ) Section 75 contributions included within the Group’s contributions paid as no participating employers left the UKRF in 2020. The Group’s expected contribution to the UKRF in respect of defined benefits in 2021 is £ 959 m ( 2020 : £ 743 m). In addition, the expected contributions to UK defined contribution schemes in 2021 is £ 35 m ( 2020 : £ 33 m) to the UKRF and £ 209 m ( 2020 : £ 185 m) to the BPSP.

Principal subsidiaries

Principal subsidiaries	12 Months Ended
	Dec. 31, 2020
34. Principal Subsidiaries
Principal subsidiaries	34 Principal subsidiaries The Group applies IFRS 10 Consolidated Financial Statements . The consolidated financial statements combine the financial statements of the Group and all its subsidiaries. Subsidiaries are entities over which the Group has control. Under IFRS 10, this is when the Group is exposed or has rights to variable returns from its involvement in the entity and has the ability to affect those returns through its power over the entity. The Group reassesses whether it controls an entity if facts and circumstances indicate that there have been changes to its power, its rights to variable returns or its ability to use its power to affect the amount of its returns. Intra-group transactions and balances are eliminated on consolidation and consistent accounting policies are used throughout the Group for the purposes of the consolidation. Changes in ownership interests in subsidiaries are accounted for as equity transactions if they occur after control has been obtai ned and they do not result in loss of control. The significant judgements used in applying this policy are set out below. Accounting for investment in subsidiaries In the individual financial statements of Barclays PLC , investments in subsidiaries are sta ted at cost less impairment. Principa l subsidiaries for the Group are set out below. This includes those subsidiaries that are most significan t in the context of the Group’s business, results or financial position. Principal place of business or incorporation Percentage of voting rights held Non-controlling interests - proportion of ownership interests Non-controlling interests - proportion of voting interests Company name Nature of business % % % Barclays Bank PLC United Kingdom Banking, holding company 100 2 - Barclays Bank UK PLC United Kingdom Banking, holding company 100 - - Barclays Bank Ireland PLC Ireland Banking 100 - - Barclays Execution Services Limited United Kingdom Service company 100 - - Barclays Capital Inc. United States Securities dealing 100 - - Barclays Capital Securities Limited United Kingdom Securities dealing 100 - - Barclays Securities Japan Limited Japan Securities dealing 100 - - Barclays US LLC United States Holding company 100 - - Barclays Bank Delaware United States Credit card issuer 100 - - The country of registration or incorporation is also the principal area of operation of each of the above subsidiaries. Ownership interests are in some cases different to voting interests due to the existence of non-voting equity interests, such as preference shares. Refer to Note 30 for more information. D etermining whether the Group has control of an entity is generally straightforward based on ownership of the majority of the voting capital. However, in certain instances, t his determination will involve judgement, particularly in the case of structured entities where voting rights are often not the determining factor in decisions over the relevant activities. This judgement will involve assessing the purpose and design of th e entity. It will also often be necessary t o consider whether the Group, or another involved party with power over the relevant activities, is acting as a principal in its own right or as an agent on behalf of others. There is also often consid erable judgement involved in the ongoing assessment of control over structured entities. In this regard, where market conditions have deteriorated such that the other investors’ exposures to the structure’s variable returns have been substantively eliminat ed, the Group may conclude that the managers of the structured entity are acting as its agent and therefore will consolidate the structured entity. An interest in equity voting rights exceeding 50% would typic ally indicate that the Grou p has control of an entity. However, the entity set out below is excluded from con solidation because the Group does not have exposure to its variable returns. Percentage of voting rights held Equity shareholders' funds Retained profit for the year Country of registration or incorporation Company name % £m £m Cayman Islands Palomino Limited 100 - - This entity is managed by an external counterparty and consequently i s not controlled by the Group. Interests relating to this entity are included in Note 35 . Significant restrictions As is typical for a g roup of its size and international scope, there are restrictions on the ability of Barclays PLC to obtain distributions of capital, access the assets or repay the liabilities of members of its Group due to the statutory, regulatory and contractual requirements of its subsidiaries and due to the protective rights of non-controlling interests. These are considered below. Regulatory requirements Barclays’ principal subsidiary companies have assets and liabilities before intercompany eliminations of £ 1,795 bn ( 2019 : £ 1,474 bn) and £ 1,703 bn ( 2019 : £ 1,388 bn ) respectively. Certain of t he se assets and liabilities are subject to prudential regulation and regulatory capital requirements in the countries in which they are regulated. These require entities to maintain minimum capital levels which ca nnot be returned to the p arent company, Barclays PLC , on a going concern basis. In order to meet capital requirements, subsidiaries may issue certain equity-accounted and debt-accounted financial instruments and non-equity instruments such as Tier 1 and Tier 2 capital instruments and other forms of subordinated liabilities. Refer to Note 27 and Note 28 for particulars of these instruments. These instruments may be subject to cancellation clauses or preference share restrictions that w ould limit the ability of the entity to repatriate the capital on a timely basis. Liquidity requirements Regula ted subsidiaries of the Group are required to meet applicable PRA or local regulatory requirements pertaining to liquidity. Some of the regulated subsidi aries include Barclays Bank PLC and Barclays Capital Securities Limited (which are regulated on a combined basis under a Domestic Liquidity Sub-Group ( DoLSub ) arrangement ) , Barclays Bank UK PLC, Barclays Bank Ireland PLC, Barclays Capital Inc. and Barclays Bank Delaware. Refer to the Liquidity risk section for further details of liquidity requirements, including those of the Group’s significant subsidiaries. Statutory requirements The Group’s subsidiaries are subject to statutory requirements not to make distributions of capital and unrealised profits and generally to maintai n solvency. These requirements restrict the ability of subsidiaries to make remittances of dividends to Barclays PLC, the ultimate parent, except in the event of a legal capital reduction or liquidation. In most cases, the regulatory restrictions referred to above exceed the statutory restrictions. Asset encumbrance The Group uses its financial assets to raise finance in the form of securitisations and through the liquidity schemes of central banks, as well as to provide security to the UK Retirement Fund. Once encumbered, the assets are not available for transfer around the Group. The assets typically affected are disclosed in Note 38. Other restrictions The Group is required to maintain balances with central banks and other regulatory authoriti es, and these amounted to £ 3,392 m ( 2019 : £ 4,893 m).

Structured entities

Structured entities	12 Months Ended
	Dec. 31, 2020
35. Structured entities
Structured entities	35 Structured en tities A structured entity is an entity in which voting or similar rights are not the dominant factor in deciding control. Structured entities are generally created to achieve a narrow and well-defined objective with restrictions around their ongoing activities. Depending on the Group’s power over the activities of the entity and its exposure to and ability to influence its own returns, it may consolidate the entity. In other cases, it may sponsor or have exposure to such an entity but not consolida te it. Consolidated structured entities The Group has contractual arrangements which may require it to provide financial support to the following types of consolidated structured entities:  Securitisation vehicles: The Group uses securitisation as a sourc e of financing and a means of risk transfer. Refer to Note 37 for further detail.  Commercial paper (CP) and medium-term conduits: The Group provided £ 11.7 bn ( 2019 : £ 8.3 bn) in undrawn contractual backstop liquidity facilities to CP conduit s.  Employee benefit trusts: The Group provides capital contributions to employee benefit trusts to enable them to meet obligations to employees in r elation to share-based remuneration arrangement s.  Other trusts: During 2020 , the Group provided undrawn l iquidity f acilities of £ 2.9 bn ( 2019 : £ 2.5 bn) to certain trusts. Unconsolidated structured entities in which the Group has an interest An interest in a structured entity is any form of contractual or non-contractual involvement which creates variability in returns arising from the performance of the entity for the Group. Such interests include holdings of debt or equity securitie s, derivatives that transfer financial risks from the entity to the Group, lending, loan commitments, financial guarantees and investment management agreements. Interest rate swaps, foreign exchange derivatives that are not complex and which expo se the Group to insignificant credit risk by being senior in the payment waterfall of a securitisation and derivatives that are determined to introduce risk or variability to a structured entity are not considered to be an interest in an entity an d have been excluded from the disclosures below. The nature and extent of the Group’s interests in structured entities is summarised below: Summary of interests in unconsolidated structured entities Secured financing Short-term traded interests Traded derivatives Other interests Total £m £m £m £m £m As at 31 December 2020 Assets Trading portfolio assets - 11,361 - - 11,361 Financial assets at fair value through the income statement 56,265 - - 2,864 59,129 Derivative financial instruments - - 2,968 - 2,968 Financial assets at fair value through other comprehensive income - - - 153 153 Loans and advances at amortised cost - - - 20,946 20,946 Reverse repurchase agreements and other similar secured lending 10 - - - 10 Other assets - - - 16 16 Total assets 56,275 11,361 2,968 23,979 94,583 Liabilities Derivative financial instruments - - 7,075 - 7,075 As at 31 December 2019 Assets Trading portfolio assets - 9,585 - 76 9,661 Financial assets at fair value through the income statement 32,859 - - 2,659 35,518 Derivative financial instruments - - 2,369 - 2,369 Financial assets at fair value through other comprehensive income - - - 391 391 Loans and advances at amortised cost - - - 19,061 19,061 Reverse repurchase agreements and other similar secured lending 77 - - - 77 Other assets - - - 28 28 Total assets 32,936 9,585 2,369 22,215 67,105 Liabilities Derivative financial instruments - - 3,171 2,437 5,608 Secured financing arrangements, short-term traded interests and traded derivatives are typically managed under market risk manageme nt policies described in the Market risk management section which includes an indication of the change of risk measures compared to last year. For this reason, the total assets of these entities are not considered meaningful for the purposes of understanding the related risks and so have not been presented. Other interests include conduits and lending where the interest is driven by normal customer demand. Secured financing The Group routinely enters into reverse repurchase contracts, stock borrowing and similar arrangements on normal commercial terms where the c ounterparty to the arrangement is a structured entity. Due to the nature of these arrangements, especially the transfer of collateral and ongoing margining, the Group has minimal exposure to the performance of the structured entity counterparty. This inclu des margin lending which is presented under financial assets at fair value through the income statement to align to the balance sheet presentation. Short-term traded interests The Group buys and sells interests in structured entities as part of its tradi ng activities, for example, retail mortgage-backed securities, collateralised debt obligations and similar interests. Such interests are typically held individually or as part of a larger portfolio for no more than 90 days. In such cases, the Group typical ly has no other involvement with the structured entity other than the securities it holds as part of trading activities and its maximum exposure to loss is restricted to the carrying value of the asset. As at 31 December 2020 , £ 10,682 m ( 2019 : £ 8 ,903 m) of the Group’s £ 11,361 m ( 2019 : £ 9,585 m ) short-term traded interests were comprised of debt securities issued by asset securitisation vehicles. Traded derivatives The Group enters into a variety of derivative contracts with structured entities which reference market risk variables such as interest rates, foreign exchange rates and credit indices among other things. The main derivative types which are considered interests in structured entities include index-based and entity specific credit default swaps, balance guaranteed swaps, total return swaps, commodities swaps, and equity swaps. A description of the types of derivatives and the risk management practices are detailed in Note 14 . The risk of loss may be mitigated through ongoing margining requirements as well as a right to cash flows from the structured entity which are senior in the payment waterfa ll. Such margining requirements are consistent with market practice for many derivative arrangements and in line with the Group’s normal credit policies. Derivative transactions require the counterparty to provide cash or other collateral under margining agreements to mitigate counterparty credit risk. The Group is mainly exposed to settlement risk on these derivatives which is mitigated through daily margining. Total notional contract amounts were £ 153,894 m ( 2019 : £ 314,170 m). Except for credit default swaps where the maximum exposure to loss is the swap notional amount, it is not possible to estimate the maximum exposure to loss in respect of derivative pos itions as the fair value of derivatives is subject to changes in market rates of interest, exchange rates and credit indices which by their nature are uncertain. In addition, the Group’s losses would be subject to mitigating action under its traded market risk and credit risk policies that require the counterparty to provide collateral in cash or other assets in most cases. Other interests in unconsolidated structured entities The Group’s interests in structured entities not held for the purposes of short-term trading activities are set out below, summarised by the purpose of the entities and limited to significant categories, based on maximum exposure to loss. Nature of interest Multi-seller conduit programmes Lending Other Total £m £m £m £m As at 31 December 2020 Trading portfolio assets - - - - Financial assets at fair value through the income statement - 98 2,766 2,864 Financial assets at fair value through other comprehensive income - 106 47 153 Loans and advances at amortised cost 5,146 12,721 3,079 20,946 Other assets 8 3 5 16 Total on-balance sheet exposures 5,154 12,928 5,897 23,979 Total off-balance sheet notional amounts 11,750 7,555 - 19,305 Maximum exposure to loss 16,904 20,483 5,897 43,284 Total assets of the entity 87,004 159,804 36,083 282,891 As at 31 December 2019 Trading portfolio assets - - 76 76 Financial assets at fair value through the income statement - 159 2,500 2,659 Financial assets at fair value through other comprehensive income - - 391 391 Loans and advances at amortised cost 5,930 8,132 4,999 19,061 Other assets 17 4 7 28 Total on-balance sheet exposures 5,947 8,295 7,973 22,215 Total off-balance sheet notional amounts 8,649 3,751 1,621 14,021 Maximum exposure to loss 14,596 12,046 9,594 36,236 Total assets of the entity 78,716 145,181 34,099 257,996 Maximum exposure to loss Unless specified otherwise below, the Group’s maximum exposure to loss is the total of its on-balance sheet positions and its off-balance sheet arrangements, being loan commitments and financial guarantees. Exposure to loss is mitigated through collateral, financial guarantees, the availabilit y of netting and credit protection held. Multi-seller conduit programme The multi-seller conduit engages in providing financing to various clients and holds whole or partial interests in pools of receivables or similar obligations. These instruments are p rotected from loss through over collateralisation, seller guarantees, or other credit enhancements provided to the conduit. The Group’s off-balance sheet exposure included in the table above represents liquidity facilities that are provided to the conduit for the benefit of the holders o f the commercial paper issued by the conduit and will only be drawn where the conduit is unable to access the commercial paper market. If these liquidity facilities are drawn, the Group is pr otected from loss through over collateralisation, seller guarantee s, or other credit enhanc ements provided to the conduit. Lending The portfolio includes lending provided by the Group to unconsolidated structured entities in the normal course of its lending business to earn income in the form of interest and lending fee s and includes loans to structured entities that are generally collateralised by property, equipment or other assets. All loans are subject to the Group’s credit sanctioning process. Collateral arrangements are specific to the circumstances of each loan wi th additional guarantees and collateral sought from the sponsor of the structured entity for certain arrangements. During the period the Group incurred an impairment of £ 23 m ( 2019 : £ 7 m) against such facilities. Other This includes fair value loans with structured entities where the market risk is materially hedged with corresponding derivative contracts, interests in debt securities issued by securitisation vehicles and drawn and undrawn lo an facilities to these entities. In addition, other includes investment funds with interests restricted to management fees based on performance of the fund and trusts held on behalf of beneficiaries with interests restricted to unpaid fees. Assets transferred to sponsored unconsolidated structured entities Assets transferred to sponsored unconsolidated structured entities were £ 730 m (2019: £ 471 m) .

Investments in associates and j

Investments in associates and joint ventures	12 Months Ended
	Dec. 31, 2020
36. Investments in associates and joint ventures
Investments in associates and joint ventures	36 Investments in associates and joint ventures Accounting for associates and joint ventures The Group applies IAS 28 Investments in Associates and IFRS 11 Joint Arrangements . Associates are entities in which the Group has significant influence, but not control, over the operating and financial policies. Generally the Group holds more than 20 %, but less than 50 %, of their voting shares. Joint ventures are arrangements where the Group has joint control and rights to the net assets of the entity. The Group ’s investments in associates and joint ventures are initially recorded at cost and increased (or decreased) each year by the Group ’s share of the post acquisition profit /( loss). The Group ceases to r ecognise its share of the losses of equity accounted associates when its share of the net assets and amounts due from the entity have been written off in full, unless it has a contractual or constructive obligation to make good its share of the losses. In some cases, investments in these entities may be held at fair value through profit or loss, for example, those held by private equity businesses. There are no individually significant investments in joint ventures or associates held by the Group . 2020 2019 Associates Joint ventures Total Associates Joint ventures Total £m £m £m £m £m £m Equity accounted 464 317 781 457 264 721 Held at fair value through profit or loss - 437 437 - 516 516 Total 464 754 1,218 457 780 1,237 Summarised financ ial information for the Group’s equity accounted associates and joint ventures is set out b elow. The amounts shown are the Group’s share of the net income of the investees for the year ended 31 December 2020 , with the exception of certain undertakings for which the amounts are based on accounts made up to dates not earlier than three months before the balance sheet date. Associates Joint ventures 2020 2019 2020 2019 £m £m £m £m Profit/(loss) from continuing operations (24) 10 24 43 Other comprehensive income/(expense) (3) - (6) 2 Total comprehensive income/(loss) from continuing operations (27) 10 18 45 Unrecognised shares of the losses of individually immaterial associates and joint ventures were £ nil ( 2019 : £ nil ). The Barclays commitments and contingencies to its associates and joint ventures comprised unutilised credit facilities provide d to customers of £ 1, 897 m ( 2019 : £ 1,726 m). In addition, the Group has made commitments to finance or otherwise provide resources to its joint ventures and associates of £ 443 m ( 2019 : £ 403 m).

Securitisations

Securitisations	12 Months Ended
	Dec. 31, 2020
37. Secutritisations
Securitisations	37 Securitisations Accounting for securitisations The Group uses securitisations as a source of finance and a means of risk transfer. Such transactions generally result in the transfer of contractual cash flows from portfolios of financial assets to holders of issued debt securities. Securitisations may, dependin g on the individual arrangement, result in continued recognition of the securitised assets and the recognition of the debt securities issued in the transaction; lead to partial continued recognition of the assets to the extent of the Group ’s continuin g involvement in those assets or lead to derecognition of the assets and the separate recognition, as assets or liabilities, of any rights and obligations created or retained in the transfer. Full derecognition only occurs when the Group transfers both its contractual right to receive cash flows from the financial assets, or retains the contractual rights to receive the cash flows, but assumes a contractual obligation to pay the cash flows to another party without material delay or reinvestment, and also tr ansfers substantially all the risks and rewards of ownership, including credit risk, prepayment risk and interest rate risk. In the course of its normal b anking activities, the Group makes transfers of financial assets, either where legal rights to the cash flows from the asset are passed to the counterparty or be neficially, where the Group retains the rights to the cash flows but assumes a responsibility to transfer them to the counterparty. Depending on the nature of the transaction, this may result in derecognition of the assets in their entirety, partial derecognition or no derecognition of the assets subject to the transfer . A summary of the main transactions, and the assets and liabilities and the financial risks arising from these transactions, is set out below: Transfers of financial assets that do not result in derecognition Securitisations The Group was party to secu ritisation transactions involving its credit card balances and other personal lending . In these transactions, the assets, interests in the assets, or beneficial interests in the cash flows arising from the assets, are transferred to a special purpose ent ity, which then issues interest bearing debt securities to third party investors. Securitisations may, depending on the individual arrangement, result in continued recognition of the securitised assets and the recognition of the debt securities issued in the transaction. Partial continued recognition of the asset s to the extent of the Group’s continuing involvement in those assets can also occur or derecognition of the assets and the separate recognition, as assets or liabilities, of any rights and obliga tions created or retained in the transfer. The following table shows the carrying amount of securitised assets that have not resulted in full derecognition, together with the associated liabilities, fo r each category of asset on the balance sheet: 2020 2019 Assets Liabilities Assets Liabilities Carrying amount Fair value Carrying amount Fair value Carrying amount Fair value Carrying amount Fair value £m £m £m £m £m £m £m £m Loans and advances at amortised cost Credit cards, unsecured and other retail lending 1,033 1,121 (1,019) (1,033) 3,516 3,678 (2,918) (2,922) Balances included within loans and advances at amortised cost represent securitisations where substantially all the risks and rewards of the asset hav e been retained by the Group. The relationship between the transferred assets and the associated liabilities is that holders of notes may only look to cash flows from the securitised assets for payments of principal and interest due to them under the terms of their notes, although the contractual terms of their notes may be different to the maturity and interest of the transferred assets. For transfers of assets in relation to repurchase agreements, refer to Note 38 . Continuing involvement in financial assets that have been derecognised In some cases, the Group may have transferred a financial asset in its entirety but may have continuing involvement in it. This arises in asset securitisations where loans and asset backed securities were derecogni sed as a result of the Group’s involvement with asset backed securities , residential mortgage backed securities and commercial mortgage backed securities . Continuing involvement largely arises from providing financing into these structures in the form of retained notes, which do not bear first losses. The table below shows the potential financial implications of such continuing involvement: Continuing involvement a Gain/(loss) from continuing involvement Carrying amount Fair value Maximum exposure to loss For the year ended Cumulative to 31 December Type of transfer £m £m £m £m £m 2020 Asset backed securities 56 56 56 1 1 Residential mortgage backed securities 49 49 49 1 1 Commercial mortgage backed securities 243 237 243 2 6 Total 348 342 348 4 8 2019 Commercial mortgage backed securities 189 188 189 1 4 Total 189 188 189 1 4 Note a Asse ts which represent the Group’s continuing involvement in derecognised assets are recorded in Loans and advances at amortised cost and Debt s ecurities at F VTP&L .

Assets pledged, collateral rece

Assets pledged, collateral received and assets transferred	12 Months Ended
	Dec. 31, 2020
38. Assets pledged, collateral received and assets transferred
Assets pledged, collateral received and assets transferred	38 Assets pledge d, collateral received and assets transferred Assets are pledged or transferred as collateral to secure liabilities under repurchase agreements, securitisations and stock lending agreements or as security deposits relating to derivatives. Assets transferred are non-cash assets transferred to a third party that do not qualify for derecognition from the Group balance sheet, for example because Barclays retains substantially all the exposure to those assets under an agreement to repurchase them in the future for a fixed price. Assets pledged or transfer red as collateral include all assets categorised as encumbered in the disclosure on pages 222 to 223 of the Barclays PLC Pillar 3 Report 2020 (unaudited) , other than those held in commercial paper conduits. In these transactions, the Group will be requir ed to step in to provide financing itself under a liquidity facility if the vehicle cannot access the commercial paper market . Where non-cash assets are pledged or transferred as collateral for cash received, the asset continues to be recognised in full, and a related liability is also recognised on the balance sheet. Where non-cash assets are pledged or transferred as collateral in an exchange for non-cash assets, the transferred asset continues to be recognised in full, and there is no associated liabili ty as the non-cash collateral received is not recognised on the balance sheet. The Group is unable to use, sell or pledge the transferred assets for the duration of the transaction and remains exposed to interest rate risk and credit risk on these pledged assets. Unless stated, the counterparty's recourse is not limited to the transferred assets. The following table summarises the nature and carrying amount of the assets pledged as security against these liabilities: 2020 2019 £m £m Cash collateral and settlements 72,042 64,400 Loans and advances at amortised cost 37,257 39,354 Trading portfolio assets 77,198 65,532 Financial assets at fair value through the income statement 5,584 10,104 Financial assets at fair value through other comprehensive income 22,185 9,278 Assets pledged 214,266 188,668 The following table summarises the transferred financial assets and the associated liabilities: Transferred assets Associated liabilities £m £m At 31 December 2020 Derivatives 77,574 (77,574) Repurchase agreements 65,673 (44,076) Securities lending arrangements 61,183 - Other 9,836 (7,408) 214,266 (129,058) At 31 December 2019 Derivatives 68,609 (68,609) Repurchase agreements 52,840 (35,708) Securities lending arrangements 49,106 - Other 18,113 (12,005) 188,668 (116,322) Included within O ther are agreements where a counterparty's recourse is limited to the transferred assets. The relationship between the transferred assets and the associated liabilities is that holders of notes may only look to cash flows from the securitised assets for payments of principal and interest due to them under the terms of their notes. Carrying value Fair value Transferred assets Associated liabilities Transferred assets Associated liabilities Net position £m £m £m £m £m 2020 Recourse to transferred assets only 1,033 (1,019) 1,121 (1,033) 88 2019 Recourse to transferred assets only 3,516 (2,918) 3,678 (2,922) 756 The Group has an additional £ 6.3 bn (2019: £ 12 bn) of loans and advances within its asset backed funding programmes that can readily be used to raise additional secured funding and are available to support future issuances. Total assets pledged includes a collateral pool put in place to provide security for the UKRF funding deficit. Refer to Note 33 for further details. Collateral held as security for assets Under certain transactions, including reverse repurchase agreements and stoc k borrowing transactions, the Group is allowed to resell or re-pledge the collateral held. The fair value at the balance sheet date of collateral accepted and re-pledged or transferred to others was as follows: 2020 2019 £m £m Fair value of securities accepted as collateral 793,573 656,598 Of which fair value of securities re-pledged/transferred to others 685,300 554,988 Additional disclosure has been included in collateral and other c redit enhancements in the Risk review section. Assets pledged as collateral include all assets categorised as encumbered in the disclosure on pages 222 to 223 o f the B arclays PLC Pillar 3 Report 2020 (unaudited).

Related party transactions

Related party transactions	12 Months Ended
	Dec. 31, 2020
39. Related party transactions and Directors' remuneration
Related party transactions and Directors remuneration	39 Related party transactions and Directors’ remuneration Related party transactions Parties are considered to be related if one party has the ability to control the other party or exercise significant influence over the other party in making financial or operational decisions, or one other party controls both. Subsidiaries Transactions between Barclays PLC and its subsidiaries meet the definition of related party transactions. Where these are eliminated on consolidation, they are not d isclosed in the Group ’s financial statements. Transactions between Barclays PLC and its subsidiaries are fully disclosed in Barclays PLC’s financial statements. A list of the Group ’s principal subsidiaries is shown in Note 34 . Asso ciates, joint ventures and other entities The Group provides banking services to its associates, joint ventures and the Group pension funds (principally the UK Retirement Fund), providing loans, overdrafts, interest and non-interest bearing depos its and current accounts to these entities as well as other services. Group companies also provide investment management and custodian services to the Group pension schemes. All of these transactions are conducted on the same terms as third party transactions. Summarised financial information for the Group ’s investments in associates and joint ventures is set out in Note 36 . Amounts included in the Group ’s financial statements, in aggregate, by category of related party ent ity are as follows: Associates Joint ventures Pension funds £m £m £m For the year ended and as at 31 December 2020 Total income - 10 5 Credit impairment charges - - - Operating expenses (26) - (1) Total assets - 1,388 4 Total liabilities 66 - 69 For the year ended and as at 31 December 2019 Total income - 12 5 Credit impairment charges - - - Operating expenses (46) - - Total assets - 1,303 3 Total liabilities - - 75 Total liabilities includes d erivatives transacted on behalf of the pension funds of £ 13 m ( 2019 : £ 6 m). Key Management Personnel Key Management Personnel are defined as those persons having authority and responsibility for planning, directing and controlling the activities of Barclays PLC (directly or indirectly) and comprise the Directors and Officers of Barclays PLC , certain direct reports of the Group Chief Executive and the heads of major business units and functions. The Group provides banking services to Key Management Personnel and persons connected to them. Transactions during the year and the balances outstanding were as follows : Loans outstanding 2020 2019 £m £m As at 1 January 7.2 7.2 Loans issued during the year a 2.3 4.8 Loan repayments during the year b (0.3) (4.8) As at 31 December 9.2 7.2 Notes a Includes loans issued to existing Key Management Personnel and new or existing loans issued to newly appointed Key Management Personnel. b Includes loan repayments by existing Key Management Personnel and loans to former Key Management Personnel. No allowances for impairment were recognised in respect of loans to Key Management Personnel (or any connected person). Deposits outstanding 2020 2019 £m £m As at 1 January 12.1 6.9 Deposits received during the year a 41.6 36.0 Deposits repaid during the year b (43.3) (30.8) As at 31 December 10.4 12.1 Notes a Includes deposits received from existing Key Management Personnel and new or existing deposits received from newly appointed Key Management Personnel. b Includes deposits repaid by existing Key Management Personnel and deposits of former Key Management Personnel. Total commitments outstanding Total commitments outstanding refers to the total of any undrawn amounts on credit cards and/or overdraft facilities provided to Key Management Personnel. Total commitments outstand ing as at 31 December 2020 were £ 0.9 m ( 2019 : £ 0.8 m). All loans to Key Management Personnel (and persons connected to them) were made in the ordinary course of business; were made on substantially the same terms, including interest rates and collateral, as those prevailing at the same time for comparable transactions with other persons ; and did not involve more than a normal risk of collectability or present other unfavourable features. Remuneration of Key Management Personnel Total remuneration awarded to Key Management Personnel below represents the awards made to individuals that have been approved by the Board Remuneration Committee as part of the latest remuneration decisions, and is consistent with the approach adopted for disclosures set out in the Directors’ Remuneration R eport . Costs recognised in the income statement reflect the accounting charge for the year included within operating expenses. The difference between the values awarded an d the recognised income statement charge principally relates to the recognition of deferred costs for prior year awards. Figures are provided for the period that individuals met the definition of Key Management Personnel. 2020 2019 £m £m Salaries and other short-term benefits 41.6 38.5 Pension costs - 0.1 Other long-term benefits 8.2 8.7 Share-based payments 13.2 13.4 Employer social security charges on emoluments 7.2 7.4 Costs recognised for accounting purposes 70.2 68.1 Employer social security charges on emoluments (7.2) (7.4) Other long-term benefits – difference between awards granted and costs recognised - (0.6) Share-based payments – difference between awards granted and costs recognised 1.1 2.2 Total remuneration awarded 64.1 62.3 Disclosure required by the Companies Act 2006 The following information regarding the Barclays PLC Board of Directors is presented in accordance with the Companies Act 2006: 2020 2019 £m £m Aggregate emoluments a 8.4 8.5 Amounts paid under LTIPs b - 0.8 8.4 9.3 Notes a The aggregate emoluments include amounts paid for the 2020 year. In addition, deferred share awards for 2020 with a total value at grant of £ 0.6 m ( 2019 : £ 2 m) will be made to James E Staley and Tushar Morzaria which will only vest subject to meeting certain conditions. b No LTIP amounts were received by the Executive Directors in 2020 as the release of the first tranche of the 2017-2019 LTIP was delayed from June 2020 to March 2021. The LTIP figure in the single total figure tabl e for Exe cutive Directors’ 2020 remuneration in the Directors’ Remuneration Report relates to the 2018 – 2020 LTIP cycle. There were no pension contributions paid to defined contribution schemes on behalf of Directors ( 2019 : £ nil ). There were no notional pensio n contributions to defined contribution schemes. As at 31 December 2020 , there were no Directors accruing benefits under a defined benefit scheme ( 2019 : nil ). Directors’ and Officers’ shareholdings and options The beneficial ownership of ordinary share capital of Barclays PLC by all Directors and Offic ers of Barclays PLC (involving 26 persons) at 31 December 2020 amounted to 27,470,067 ( 2019 : 22,789,126 ) ordinary shares of 25 p each ( 0.16 % of the ordinary share capital outstanding). A s a t 31 December 2020 , E xecutive Directors and Offic ers of Barclays PLC (involving 16 persons) held options to purchase a total of 78,495 ( 2019 : 40,428 ) Barclays PLC ordinary sha res of 25 p each at a weighted average price of 101 p under Sharesave . Advances a nd credit to Directors and guarantees on behalf of Directors In accordance with Section 413 of the Companies Act 2006, the total amount of advances and credits made available in 2020 to persons who served as Di rectors during the year was £ 0.1 m ( 2019 : £ 0.3 m). The total value of guarantees entered into on behalf o f Directors during 2020 was £ nil ( 2019 : £ nil ).

Auditor's remuneration

Auditor's remuneration	12 Months Ended
	Dec. 31, 2020
40. Auditor's remuneration
Auditor's remuneration	40 Auditor ’ s remuneration A uditor ’ s remuneration is included within consultancy, legal and professional fees in administration and general expenses and comprises : 2020 2019 2018 £m £m £m Audit of the Barclays Group's annual accounts 9 10 8 Other services: Audit of the Company's subsidiaries a 38 35 32 Other audit related fees b 10 9 9 Other services 2 2 2 Total Auditor's remuneration 59 56 51 Notes a Comprises the fees for the statutory audit of subsidiaries both inside and outside the UK and fees for work performed by associates of KPMG in respect of the consolidated financial statements of the Company . b Comprises services in relation to statutory and regulatory filings. These include audit services for the review of the interim financial information under the Listing Rules of the UK listing authority. Under SEC regulations, the remuneration of our auditors is required to be presented as follows: audit fees £ 52 m (2019 : £ 50 m, 2018 : £ 4 5 m), audit-related fees £ 6 m (201 9 : £ 5 m, 201 8 : £ 5 m), tax fees £ nil (201 9 : £ nil , 201 8 : £ nil ), and all other fees £ 1 m (201 9 : £ 1 m, 201 8 : £ 1 m).

Interest rate benchmark reform

Interest rate benchmark reform	12 Months Ended
	Dec. 31, 2020
41. Interest rate benchmark reform
Interest rate benchmark reform	41 Interest rate benchmark reform Following the financial crisis, the reform and replacement of benchmark interest rates such as IBOR has become a priority for global regulators. The UK’s Financial Conduct Authority (FCA) and other global regulators have instructed market participants to prepare for the cessation of LIBOR after the end of 2021, and to adopt “near Risk-Free Rates” (RFRs). While it is expected that most reforms affecting the Group will be completed by the end of 2021, consultations and possible regulatory changes are in progress. This may mean that some LIBORs continue to be published beyond that date. The Group’s risk exposure is predominately to GBP, USD, JPY and CHF LIBOR and Euro Overnight Index Average (EONIA) with the vast majorit y concentrated in derivatives within the Corporate and Investment Bank. Some additional exposure resides on floating rate loans and advances, repurchase agreements and debt securities held and issued within the Corporate and Investment Bank. Retail lending and mortgage exposure in Barclays UK is minimal. The Group does not consider there to be risk in respect of the Euro Interbank Offered Rate (EURIBOR) arising from IBOR reform as at 31 December 2020. This is because the calculation methodology of EURIBOR changed during 2019 and the reform of EURIBOR is complete. In July 2019, the Belgian Financial Services and Markets Authority (as the administrator of EURIBOR) granted authorisation with respect to EURIBOR under the European Union Benchmarks Regulation. Th is allows market participants to continue to use EURIBOR after 1 January 2021 for both existing and new contracts. The EUR Risk Free Rate Working Group has not contempla ted the cessation of EURIBOR. The Group expects that EURIBOR will continue to exist as a benchmark rate for the foreseeable future. There are key differences between IBORs and RFRs. IBORs are ‘term rates’, which means that they are published for a borrowing period (for example three months), and they are ‘forward-looking’, because they are published at the beginning of a borrowing period, based upon an estimated inter-bank borrowing cost for the period. RFRs are based upon overnight rates from actual transactions, and are therefore published after the end of the overnight borrowing period. F urthermore, IBORs include a credit spread over the RFRs. Therefore, to transition existing contracts and agreements to RFRs, adjustments for term and credit differences may need to be applied to RFR-linked rates. The methodologies for determining these adj ustments are undergoing in-depth consultations by industry working groups, on behalf of the respective global regulators and related market participants. How the Group is managing the transition to alternative benchmark rates Barclays has established a Group-wide LIBOR Transition Programme, with oversight from the Group Finance Director. The Programme spans all business lines and has cross-functional governance which includes Legal, Conduct Risk, Client Engagement and Communications, Risk, and Finance. T he Transition Programme aims to drive strategic execution, and identify, manage and resolve key risks and issues as they arise. Accountable Executives are in place within key working groups across businesses and workstreams. Barclays’ transition plans prim arily focus on G5 currencies while providing quarterly updates on progress and exposures to the PRA/FCA and other regulators as required. The Transition Programme follows a risk based approach, using recognised ‘change delivery’ control standards, to driv e strategic execution, and identify, manage and resolve key risks and issues as they arise. Accountable Executives are in place within key working groups, with overall Board oversight delegated to the Board Risk Committee and the Group Finance Director. Ba rclays performs a prominent stewardship role to drive orderly transition via our representation on official sector and industry working groups across all major jurisdictions and product classes. Additionally, the Group Finance Director is Chair of the UK’s ‘Working Group on Sterling Risk-Free Reference Rates’, whose mandate is to catalyse a broad-based transition to using SONIA (‘Sterling Overnight Index Average’) as the primary sterling interest rate benchmark in bond, loan and derivatives markets. Appro aches to transition exposure expiring post the expected end dates for LIBOR vary by product and nature of counterparty. The Group is actively engaging with the counterparties to transition or include appropriate fallback provisions and transition mechanism s in its floating rate assets and liabilities with maturities after 2021, when most IBORs are expected to cease to be published. For the derivative population, adherence to the ISDA IBOR Fallbacks Protocol now provides Barclays with an efficient mechanism to amend outstanding trades to incorporate fallbacks. Beyond the ISDA IBOR Fallbacks Protocol, there will be options to terminate or bilaterally agree new terms with counterparties. Barclays expects derivative contracts facing central clearing counterparti es to follow a market-wide, standardised approach to reform. Market participants are currently awaiting publication of the results of ICE Benchmark Administration’s consultation on plans to cease publication of most LIBORs at end 2021, with certain, activ ely used USD LIBOR tenors continuing to be provided until end June 2023. The FCA expects to enable publication of a synthetic LIBOR rate for at least certain actively used GBP LIBOR tenors to facilitate roll-off of relevant contracts that cannot be activel y transitioned by end 2021. Progress made during 2020 During 2020, the Group has successfully delivered Alternative RFR product capabilities and alternatives to LIBOR across loans, bonds and derivatives. Good progress has been made in rela tion to client outreach and we have been actively engaging with customers and counterparties to transition or include the appropriate fallback provisions. The Group has in place detailed plans, processes and procedures to support the transition of the rema inder during 2021. Barclays has adhered to the ISDA IBOR Fallbacks Protocol for its major derivative dealing entities and we continue to track progress and engage with clients on their own adherence. Following the progress made during 2020, the Group conti nues to deliver technology and business process changes to ensure operational readiness in preparation for LIBOR cessation and transitions to RFRs that will be necessary during 2021 in line with official sector expectations and milestones. Risks to which the Group is exposed as a result of the transition IBOR reform exposes the Group to various risks, which are being managed through the LIBOR Transition Programme. The material risks identified include those set out below:  Conduct and Litigation Risk: This is the risk that poor customer outcomes are brought about as a direct result of inappropriate or negligent conduct on the part of Barclays, in connection with IBOR transition.  Operational Risk : The LIBOR Transition Programme cuts ac ross all businesses and functions. There are a number of implementation challenges arising from transition, including technology, operations, client communication and the measurement of valuation, giving rise to additional operational risks.  Market Risk: Changes to Barclays Market Risk profile are expected due to IBOR transition. These changes are expected to be managed within risk appetite. IBOR transition will also impact the basis risk profile both at the cessation event (when broadly all LIBOR contract s fall back to alternatives) as well as in the interim period when alternative rates are referenced in contracts.  Counterparty Credit Risk: LIBOR replacement presents an increased risk of clients wishing to renegotiate the terms of existing transactions. This is dependent on client behaviour and the outcome of resulting negotiations and could change the credit risk profile of client exposure.  Financial Risk: There is a risk to Barclays and its clients that markets are disrupted due to IBOR reform. This c ould give rise to financial losses should Barclays be unable to operate effectively in financial markets.  Accounting Risk: This would occur if the hedged items and hedging instruments of Barclays hedging relationships were to transition away from IBORs: at different times; to different benchmarks; or using divergent methodologies resulting in significant volatility to the income statement either through hedge accounting ineffectiveness or failure of the hedge accounting relationships. A disorderly cessat ion of LIBOR would carry substantial economic, legal, regulatory, reputational and operational risks for Barclays and the industry in general. Barclays’ expectation is that the transition away from LIBOR will be carefully managed and that measures includin g the broad adoption of ISDA IBOR Fallbacks Protocol, the approach the Central Clearing Counterparties are expected to follow, proactive client engagement, regulatory action and/or terminating or bilaterally amending contracts where clients do not wish to adopt new conventions (e.g. ISDA IBOR Fallbacks Protocol), can mitigate the risks associated with a disorderly cessation. The Group does not expect material changes to its risk management approach and strategy as a result of interest rate benchmark reform . The following table summarises the significant exposures impacted by interest rate benchmark reform as at 31 December 2020: GBP LIBOR USD LIBOR JPY LIBOR CHF LIBOR Others Total £m £m £m £m £m £m Non-derivative financial assets Loans and advances at amortised cost 30,179 18,109 173 18 1,725 50,204 Reverse repurchase agreements and other similar secured lending - 334 - - - 334 Financial assets at fair value through the income statement 3,496 6,373 - 283 209 10,361 Financial assets at fair value through other comprehensive income 186 114 - - 8 308 Non-derivative financial assets 33,861 24,930 173 301 1,942 61,207 Non-derivative financial liabilities Debt securities in issue (1,023) (10,718) (1,201) - - (12,942) Subordinated liabilities (71) (1,592) - - - (1,663) Financial liabilities designated at fair value (149) (1,273) (759) - (139) (2,320) Non-derivative financial liabilities (1,243) (13,583) (1,960) - (139) (16,925) Standby facilities, credit lines and other commitments 18,944 74,011 - 74 15,951 108,980 The table above represents the exposures to interest rate benchmark reform by balance sheet account , which have yet to transition . The exposure disclosed is for positions with contractual matu rities after 31 December 2021. Balances reported at amortised cost are disclosed at their gross carrying value and do not include any expected credit losses that may be held against them. Balances reported at fair value are disclosed at their fair value on the balance sheet date. The table above represents the exposures to interest rate benchmark reform by balance sheet account , which have yet to transition . The exposure disclosed is for positions with contractual matu rities after 31 December 2021. Balances reported at amortised cost are disclosed at their gross carrying value and do not include any expected credit losses that may be held against them. Balances reported at fair value are disclosed at their fair value on the balance sheet date. The Group als o has exposure to interest rate benchmark reform in respect of its cash collateral balances across some of its Credit Support Annex agreements, predominantly in EONIA. This exposure is not included within the table above due to its short dated nature. GBP LIBOR USD LIBOR EONIA JPY LIBOR CHF LIBOR Others Total £m £m £m £m £m £m £m Derivative notional contract amount OTC interest rate derivatives 592,827 2,832,802 457,844 754,206 25,681 41,782 4,705,142 OTC interest rate derivatives - cleared by central counterparty 1,684,553 2,891,029 638,202 1,091,479 119,382 198,113 6,622,758 Exchange traded interest rate derivatives 300,182 333,705 - - 2,494 - 636,381 OTC foreign exchange derivatives 155,285 589,334 - 93,108 31,257 1,921 870,905 OTC equity and stock index derivatives 1,845 7,946 544 1,929 491 2,141 14,896 Derivative notional contract amount 2,734,692 6,654,816 1,096,590 1,940,722 179,305 243,957 12,850,082 The table above represents the derivative exposures to in terest rate benchmark reform, which have yet to transition . The exposure disclosed is for positions with contractual matu rities after 31 December 2021. Derivatives are reported by using the notional contract amount and where derivatives have both pay and receive legs with exposure to benchmark reform such as cross currency swaps, the notional contract amount is disclosed for both legs. As at 31 December 2020, there were £ 264 bn of c ross currency swaps where both the pay and receive legs are impacted by interest rate benchmark reform. The Group also had £ 28 bn of Barclays issued debt retained by the group, impacted by the interest rate benchmark reform, predominately in GBP and USD LI BOR. The table below provides detail on the contractual maturity of the above exposures: Over one year but not more than two years Over two years but not more than five years Over five years but not more than ten years Over ten years Total Current benchmark rate £m £m £m £m £m Non-derivative financial assets GBP LIBOR 4,771 11,309 2,409 15,372 33,861 USD LIBOR 8,389 14,654 1,715 172 24,930 JPY LIBOR 11 144 - 18 173 CHF LIBOR 22 73 90 116 301 Other 931 713 60 238 1,942 Non-derivative financial assets 14,124 26,893 4,274 15,916 61,207 Non-derivative financial liabilities GBP LIBOR (1,055) (116) - (72) (1,243) USD LIBOR (5,529) (3,623) (4,174) (257) (13,583) JPY LIBOR (1,289) (145) (241) (285) (1,960) CHF LIBOR - - - - - Other (12) (5) - (122) (139) Non-derivative financial liabilities (7,885) (3,889) (4,415) (736) (16,925) Equity GBP LIBOR - - - (3,500) (3,500) USD LIBOR - - - (3,131) (3,131) Equity - - - (6,631) (6,631) Derivative notional contract amount GBP LIBOR 890,497 767,769 491,063 585,363 2,734,692 USD LIBOR 2,020,529 2,572,716 1,350,762 710,809 6,654,816 EONIA 397,989 421,460 212,185 64,956 1,096,590 JPY LIBOR 327,669 582,200 731,942 298,911 1,940,722 CHF LIBOR 46,868 73,792 46,010 12,635 179,305 Other 50,775 96,657 72,127 24,398 243,957 Derivative notional contract amount 3,734,327 4,514,594 2,904,089 1,697,072 12,850,082 Standby facilities, credit lines and other commitments GBP LIBOR 5,134 12,016 505 1,289 18,944 USD LIBOR 15,368 56,300 735 1,608 74,011 CHF LIBOR - 74 - - 74 Other 2,897 12,170 862 22 15,951 Standby facilities, credit lines and other commitments 23,399 80,560 2,102 2,919 108,980

Barclays PLC (the Parent compan

Barclays PLC (the Parent company)	12 Months Ended
	Dec. 31, 2020
42. Barclays PLC (the Parent company)
Barclays PLC (the Parent company)	42 Barclays PLC (the Parent c ompany) Total income Dividends received from subsidiaries Dividends rec eived from subsidiaries of £ 763 m (2019: £ 1,560 m, 2018: £ 15,360 m) largely relates to dividends receiv ed from Barclays Bank PLC £ 263 m, Barcla ys Execution Services Limited £ 250 m and Barclays Bank UK PLC £ 220 m. The dividends received in 2018 included both a dividend in specie, representing the transfer of the holding in Barclays Bank UK PLC from Barclays Bank PLC to Barclays PLC, and ordinary dividends from subsidiaries. The dividends receive d from its banking subsidiaries were paid up to Barclays P LC prior to the announcement made by the PRA on 31 March 2020 that capital be preserved for use in serving Barclays customers and clients through the extraordinary challenges presented by the C OVID - 19 pandemic. As part of a response to this announcement, Barclays PLC took steps to provide additional capital to its banking subsidiaries . Further detail can be found in the notes below . Other income Other incom e of £ 1,192 m (2019: £ 1,760 m, 201 8: £ 923 m) includes £ 857 m (2019: £ 813 m, 2018: £ 752 m) of income received from gross coupon payments on Barclays Bank PLC and Barclays Bank UK PLC issued AT1 securities and £ 248 m (2019: £ 947 m) of fair value and foreign exchange losses on other positions with subsidiari es . Total assets and liabilities Investment in subsidiaries The investment i n subsidiaries of £ 58 , 886 m (2019 : £ 5 9,546 m) predominantly relates to investments in Barclays Bank PLC of £ 44,015 m (2019: £ 42,363 m) and Barclays Bank UK PLC of £ 14,245 m (2019: 16,595 m) which includes holdin gs of their AT1 securities of £ 10,995 m (201 9: £ 10,843 m). The de crease of £ 660 m during the year was predominantly driven by a £ 2,57 3 m impairment in the cost o f investment of Barclays Bank UK P LC and the redemption of AT1 holdings of € 1,000 m , partially offset by capital contributions t o Barclays Bank PLC totaling £ 1,500 m and Barclays Bank UK PLC totaling £ 220 m, as well as additional AT1 holdings of $ 1,500 m in Barclays Bank PLC . At the end of each rep orting period an impairment review is undertaken in respect of investment in the ordinary shares of subsidiaries. Impairment is indicated where the investment exceeds the recoverable amount. The recoverable amount is calculated as a value in use (VIU) whic h is derived from the present value of future cash flows expected to be received from the investment. The VIU calculations use forecast attributable profit based on financial budgets approved by management, covering a five year period as an approximation o f future cash flows discounted using a pre-tax discount rate appropriate to the subsidiary being tested. A terminal growth rate has then been applied to the cash flows thereafter which is based upon expectations of future inflation rates. The review ident ified an impairment in the investment in Barclays Bank UK PLC (see below). For the other investment in subsidiaries the value in use calculated was higher than the carrying value. Impairment in subsidiaries Due to the impact of the COVID-19 pandemic on the macroeconomic environment , the review identified impairment of the investment in B arclays B ank UK PLC of £ 2,573 m , reducing its carrying value to £ 11,672 m. The VIU calculation uses 5-year profit before tax forecasts based on the formally agreed medium t erm plans approved by the Board as an approximation of future cash flows. The Personal Ba nking cash flows specific to Barclays Bank UK PLC contained in the calculation have been extended to a sixth year (prior to the calculation of terminal values) to refl ect an observed 15 bp inflexion point in the yield curve which was beyond the period of the medium term plan. A discount rate of 13.8 % (2019: 13.7 %) has been applied to the cash flow forecast. In determining the discount rate, management have identified a cost of equity associated with a market participant that closely resemble the subsidiary and adjusted for tax to arrive at the pre-tax equivalent rate. A terminal growth rate of 2.0 % (2019: 1.6 %) has been used to calculate a terminal value for the invest ment. In prior years the terminal growth rate used has been based on estimated economic growth rates (GDP). Due to the macroeconomic uncertainties management now consider inflation rates to provide a better approximation of future long term growth . A 1% increase in the discount rate or terminal growth rate would increase the impairment amount in Barclays Bank UK by £ 1,056 m and £ 714 m respectively. A reduction in the forecasted cash flows by 10% per annum would increase impairment by £ 1,061 m. Loans and advances in subsidiaries During the year, loans and advances to subsidiaries decreased by £ 4,140 m to £ 24,710 m (2019: £ 28,850 m). The decrease was driven by the maturity of £ 1,200 m dated subordinated loans and waiving £1,000m of dated subordinated loans in relation to Barclays Bank P LC , the maturity of £ 1,100 m dated subordinated notes in relation to Barclays Bank UK PLC, the £ 900 m partial buy back of dated subordinated loans from Barclays Bank P LC and Barclays Bank UK P LC and a £ 220 m reduction used to fund a capital contribution to Barclays Bank UK PLC. This was partially offset by c£ 1,300 m new issuances of dated subordinated notes by Barclays Bank UK P LC to Barclays P LC . Financial assets and liabilities designated at fair value Financial liabilities designated at fair value of £ 9,507 m (2019: £ 3,498 m ) includes new issuances during the year of $ 2,5 0 0 m Fixed Rate Resetting Senior Callable Notes, $ 1,750 m Fixed-to-Floating Rate Senior Callable Notes, € 2,000 m Reset Notes, £ 40 0 m Reset Notes and $ 300 m Zero Coupon Callable Notes . The proceeds raised through these transactions were used to invest in subsidiaries of Barclays PLC and are included within the financial assets designated at fair value through the income statement balance of £ 17 ,521 m (201 9: £ 10,348 m). The effect of changes in the liabilities’ fair value, including those due to credit risk, is expected to offset the changes in the fair value of the related financial asset in the income statement The difference between the financia l liabilities’ carrying amount and the contractual amount on maturity is £ 324 m (2019 : £ 174 m ). Subordinated liabilities and d ebt s ecurities in issue During t he year, Barclays PLC issued £ 500 m and $ 1,00 0 m of Fixed Rate Resetting Subordinated Callable Notes, which are included within the subordinated liabilitie s balance of £ 7,724 m (2019: £ 7 ,6 5 6 m) and redeemed € 1,250 m Fixed Rate Subordinated Callable Notes. Deb t s ecurities in issue of £ 28,428 m (201 9 : £ 3 0,564 m) have r educed in the year due to the maturity of positions with subsidiaries as well as the partial buy back of Senior Fixed Rate Note s of € 33 0 m and Senior Floating Rate Notes of $ 776 m . Management of internal investments, loans and advances Barclays PLC retains the discretion to manage the nature of its internal investments in subsidiaries according to their regulatory and business needs. Barclays PLC may invest capital and funding into Barclays Bank PLC, Barclays Bank UK PLC and ot her Group subsidiaries such as Barclays Execution Services Limited and the US Intermediate Holding Company (IHC). Total equity Called up share capital and share premium Called up share capital and share premium of Barc lays PLC is £ 4,637 m (2019: £ 4,594 m). The increase in the year is primarily due to shares issued under employee share schemes . Other equity instruments Ot her equity instruments of £ 11,169 m (201 9 : £ 10,865 m) comprises AT1 securities issued by Barclays PLC. AT1 securities are perpetual subordinated contingent convertible securities structured to qualify as AT1 instruments under prevailing capital rules applicable as at the relevant issue date . During the year there has been a new AT1 issuance with principal amoun t totaling $ 1,50 0 m (£ 1,142 m) and a redemption of principal a mount € 1,00 0 m (£ 831 m). For further details, please refer to Note 28 .

Other disclosures - Risk Manage

Other disclosures - Risk Management and Principal Risks (audited)	12 Months Ended
	Dec. 31, 2020
Other disclosures - Risk Management and Principal Risks
Other disclosures - Risk Management and Principal Risks	Credit risk management (audited) The risk of loss to the Group from the failure of clients, customers or counterparties, including sovereigns, to fully hono ur their obligations to the Group , including the whole and timely payment of principal, interest, collateral and other receivables. Overview The credit risk that the Group faces arises from wholesale and retail loans and advances together with the counterparty credit risk arising from derivative contracts with clients; trading activities, including: de bt securities, settlement balances with mar ket counterparties, FVOCI (Fair Value through Other Comprehensive Income) assets and reverse repurchase loans. Credit risk management objectives are to:  maintain a framework of controls to oversee credit risk;  identify, assess and measure credit risk clearly and accurately across the Group and within each separate business, from the level of individual facilities up to the total portfolio;  control and plan credit risk taking in line with external stakeholder exp ectations and avoiding undesirable concentrations;  monitor credit risk and adherence to agreed controls . Organisation, roles and responsibilities The first line of defence has primary responsibility for managing credit risk within the risk appetite and lim its set by the Risk function, supported by a defined set of policies, standards and controls. In the entities, business risk committees (attended by the first line) monitor and review the credit risk profile of each business unit where the most material is sues are escalated to the Retail Credit Risk Management Committee, Wholesale Credit Risk Management Committee and Group Risk Committee . Wholesale and r etail portfolios are managed separately to reflect the differing nature of the assets; wholesale ba lances tend to be larger and are managed on an individual basis, while retail balances are greater in number but lesser in value and are, therefore, managed in aggregated segments. The responsibilities of the credit risk management teams in the businesses, the sanctioning team and other shared services include: sanctioning new credit agreements (principally wholesale); setting strategies for approval of transactions (principally retail); setting risk appetite; monitoring risk against limits and other parame ters; maintaining robust processes, data gathering, quality, storage and reporting methods for effective credit risk management; performing effective turnaround and workout scenarios for wholesale portfolios via dedicated restructuring and recoveries teams ; maintaining robust collections and recovery processes/units for retail portfolios; and review and validation of credit risk measurement models. The credit risk management teams in each legal entity are accountable to the relevant Legal Entity CRO, who re ports to the Group CRO. For wholesale portfolios , credit risk managers are organised in sanctioning teams by geography, industry and/or product. In wholesale portfolios, credit risk approval is undertaken by experienced credit risk professionals operating within a clearly defined delegated authority framework, with only the most senior credit officers assigned the higher levels of delegated authority. The largest credit e xposures, which are outside the Risk Sanctioning Unit or Risk Distribution Committee authority, require the support of a legal entity Senior Credit Officer. For exposures in excess of the legal entity Senior Credit Officer’s authority, approval by Group Se nior Cred it Officer/Board Risk Committee is also required. The Group Credit Risk Committee, attended by legal entity Senior Credit Officers, provides a formal mechanism for the Group Senior Credit Officer to exercise the highest level of credit autho rity over the most material Group single name exposures. Credit risk mitigation The Group employs a range of techniques and strategies to actively mitigate credit risks. These can broadly be divided into three types:  netting and set-off  collateral  risk transfer. Netting and set-off C red it risk exposures can be reduced by applying netting and set-off. For derivative transactions, the Group’s normal practice is, on a legal entity basis, to enter into standard master agreements with counterparties (e.g. ISDAs). These master agreements typically allow for netting of credit risk exposure to a cou nterparty resulting from derivative transactions against the obligations to the counterparty in the event of default, and so produce a lower net credit exposure. These agreements may also reduce settlement exposure (e.g. for foreign exchange transactions) by allowing payments on the same day in the same currency to be set-off against one another. Collateral The Group has the ability to call on collateral in the event of default of the counterparty, comprising:  home loans: a fixed charge over residential property in the form of hou ses, flats and other dwellings;  wholesale lending: a fixed charge over commercial property and other ph ysical assets, in various forms;  other retail lending: includes charges over motor vehicle s and other physical assets; second lien charges over residential property ; and finance lease receivables;  derivat ives: the Group also often seeks to enter into a margin agreement (e.g. Credit Support Annex) with counterparties with which the Group has master netting agreements in place. These annexes to master agreements provide a mechanism for further reducing credi t risk, whereby collateral (margin) is posted on a regular basis (typically daily) to collateralise the mark to market exposure of a derivative portfolio measu red on a net basis;  reverse repurchase agreements: collateral typically comprises highly liquid s ecurities which have been legally transferred to the Group subject to an agreement t o return them for a fixed price; and  financial guarantees and similar off-balance sheet commitments: cash collateral may be held against these arrangements . Risk transfer A range of instruments including guarantees, credit insurance, credit derivatives and securitisation can be used to transfer credit risk from one counterparty to another. These mitigate credit risk in two main ways :  if the risk is transferred to a counterparty which is more creditworthy than the original counterparty, then overall credit risk is reduced  where recourse to the first counterparty remains, both counterparties must default before a loss materialises. This is less likely than the default of either counterparty individually so credit risk is reduced. Detailed policies are in place to appropriately recognise and record credit risk mitigation. For more information, refer to pages 177 to 179 of the Barclays PLC Pillar 3 Report 2020 (unaudited). Market risk management (audited) The risk of loss arising from potential adverse changes in the value of the Group’s assets and liabilities from fluctuation in market variables including, but not limited to, interest rates, foreign exchange, equity prices, commodity prices, credit spreads, implied volatilities and asset correlations. Overview Market risk arises primaril y as a result of client facilitation in wholesale markets, involving market making activities, risk management solutions and execution of syndications. Upon execution of a trade with a client, the Group will look to hedge against the risk of the trade movi ng in an adverse direction. Mismatches between client transactions and hedges result in market risk due to changes in asset prices, volatility or correlations. Organisation, roles and responsibilitie s Market risk in the businesses resides primarily in Ba rclays International and Treasury. These businesses have the mandate to assume market risk. The front office and Treasury trading desks are responsible for managing market risk on a day-to-day basis, where they are required to understand and adhere to all limits applicable to their businesses. The Market Risk team support s the trading desks with the day-to-day limit management of market risk exposures through governance processes which are outlined in supporting market risk policies and standards. Market ri sk oversight and challenge is provided by business committees and Group committ ees, including the Market Risk C ommittee ( MRC ) . The objectives of market risk management are to:  i dentify, understand and control market risk by robust measurement, limit setting, reporting and oversight  facilitate business growth within a controlled and transparent risk management framework  control market risk in the businesses according to the allocated appetite. To meet the above objectives, a governance structure is in place to manage these risks consistent with the ERMF. The BRC recommends market ris k appetite to the Board for their approval. Th e Market Risk Principal Risk Lead (PR Lead) is responsible for the Market Risk Control Framework and, under delegated authority from the Group CRO, agrees with the b usiness CROs a limit framework within the context of the approved market risk appetite. The MRC review s and makes recommendations concerning the g roup-wide market risk profile. This includes overseeing the operation of the Market Risk Framework and associated standards and policies; reviewing market or regulatory issues a nd limits and utilisation. The c omm ittee is chaired by the PR Lead and attendees include the business heads of market risk and business aligned market risk managers. In addition to MRC, the Corporate and Investment Bank Risk Committee (‘CIBRC’) is the main forum in which market risk exposures are discussed and reviewed with senior business heads. The Committee is chaired by the CRO of Barclays International and meets weekly, covering current market events, notable market risk exposures, and key risk topics . New business initiatives are generally socialised at CIBRC before any changes to risk appetite or associated limits are considered in other governance committees. The head of each business is accountable for all market risks associated with its activit ies, while the head of the market risk team covering each business is responsible for implementing the risk control framework for market risk. For m ore information on market risk management , refer to the Barclays PLC Pillar 3 Report 2020 (unaudited) . M anagement value at risk (VaR) VaR is an estimate of the potential loss arising from unfavourable market movements if the current positions were to be held unchanged for one business day. For internal market risk management purposes, a historical simulation methodology with a two-year equally weighted historical period, at the 95% confidence level is used for all trading books and some banking books. Limits are applied at the total level as well as by risk factor type, which are then cascaded down to particular trading desks and businesses by the market risk management function. See the market risk performance section for a review of management VaR in 2020. Treasury and capital risk management This comprises: Liquidity risk: The risk that the Group is unable to meet its contractual or contingent obligations or that it does not have the appropriate amount, tenor and composition of funding and liquidity to support its assets. Capital risk: The risk that the Group has an insufficient level or composition of capital to support its normal business activities and to meet its regulatory capital requirements under normal operating environments or stressed conditio ns (both actual and as defined for internal planning or regulatory testing purposes). This also includes the risk from the Group ’s pension plans. Interest rate risk in the banking book: The risk that the Group is exposed to capital or income volatility bec ause of a mismatch between the interest rate exposures of its (non - traded) assets and liabilities. The Treasury function manages treasury and capital risk exposure on a day-to-day basis with the Group Treasury Committee acting as the principal management b ody. The Treasury and Capital Risk function is responsible for oversight and provide insight into key capital, liquidity, interest rate risk in the banking book (IRRBB) and pension risk management activities. Liquidity risk management (audited) Overview The efficient management of liquidity is essential to the Group in order to retain the confidence of the financial markets and maintain the sustainability of the business. The liquidity risk control framework is used to manage all liquid ity risk exposures under both typical and stressed conditions. The framework is designed to maintain liquidity resources that are sufficient in amount, quality and funding tenor profile to support the liquidity risk appetite as exp ressed by the Barclays PLC Board. The liquidity risk appetite is monitored against both internal and regulatory liquidity metrics. Organisation, roles and responsibilities Treasury has the primary responsibility for managing liquidity risk within the set risk appetite. Both Risk and Treasury contribute to the production of the I nternal L iquidity A dequacy A ssessment P rocess (ILAAP) . The Treasury and Capital Risk function is responsible for the management and governance of the liquidity risk mandate, as defined by the Board. The liquidity risk control framework is designed to deliver the appropriate term and structure of funding, consistent with the liquidity risk appetite set by the Board. The control framework incorporates a range of ongoing business management tools to monitor, limit and stress test the Group’s balance sheet, contingent liabilities and the recovery plan. Limit setting and transfer pricing are tools that are designed to control the level of liquidity risk taken and drive the appropriate mix of funds. Toge ther, these tools reduce the likelihood that a liquidity stress event could lead to an inability to meet Group’s obligations as they fall due. The Board approves the Group funding plan, internal stress tests, regulatory stress test results, recovery plan a nd Liquidity Risk Appetite. The Group Treasury Committee is responsible for monitoring and managing liquidity risk in line with the Group’s funding management objectives, funding plan and risk appetite. The Treasury and Capital Risk Committee monitors and reviews the liquidity risk profile and control environment, providing second line oversight of the management of liquidity risk. The Board Risk Committee reviews the risk profile, and annually reviews risk appetite and the impact of stress scenarios on the Group funding plan/forecast in order to agree the Group’s projected funding abilities. Capital risk management (audited) Overview Capital risk is managed through ongoing monitoring and management of the capital position, regular stress testing and a robust capital governance framework. The objectives of the framework are to maintain adequate capital for the Group and legal entities to withstand the impact of the risks that may arise under normal and stressed conditions, and maintain adequate capital to cover current and forecast business needs and associated risks to provide a viable and sustainable business offering. Organisation, roles and responsibilities Treasury has the primary responsibility for managing and monitoring capital. The Treasury and Capital Risk function provides oversight of capital risk and is an independent risk fu nction that reports to the Group CRO. Production of the Barclays PLC I nternal C apital A dequacy A ssessment P rocess (ICAAP) is the responsibility of Treasury. Capital risk management is underpinned by a control framework and policy. The capital management strategy, outlined in the Group and legal entity capital plans, is developed in alignment with the control framework and policy for capital risk, and is implem ented consistently in order to deliver on the Group’s objectives. The Board approves the Group capital plan, internal stress tests and results of regulatory stress tests, and the Group recovery plan. The Group Treasury Committee is responsible for monitori ng and managing capital risk in line with the Group’s capital management objectives, capital plan and risk frameworks. The Treasury and Capital Risk Committee monitors and reviews the capital risk profile and control environment, providing second l ine over sight of the management of capital risk. The BRC reviews the risk profile, and annually reviews risk appetite and the impact of stress scenarios on the Group capital plan/forecast in order to agree the Group’s projected capital adequacy. Local management assures compliance with an entity’s minimum regulatory capital requirements by reporting to local Asset and Liability Committees (ALCOs) with oversight by the Group Treasury Committee, as required. In 2020 , Barclays complied with all regulatory minimum cap ital requirements. P e nsion risk The Group maintains a number of defined benefit pension schemes for past and current employees. The ability of schemes to meet pension payments is achieved with investments and contributions. Pension risk arises because the market value of pension fund assets might decline; investment returns might reduce; or the estimated value of pension liabilities might increase. The Group monitors the pension risks arising from its defined benefit pension schemes and works with Trustees to address shortfalls. In these circumstances, the Group could be required or might choose to make extra contributions to the pension fund. The Group’s main defined benefit scheme was closed to new entrants in 2012 . Maximum exposure and effects of netting, collateral and risk transfer (audited) Maximum exposure Netting and set-off Cash collateral Non-cash collateral Risk transfer Net exposure As at 31 December 2020 £m £m £m £m £m £m On-balance sheet: Cash and balances at central banks 191,127 - - - - 191,127 Cash collateral and settlement balances 101,367 - - - - 101,367 Loans and advances at amortised cost: Home loans 159,647 - (284) (159,203) (85) 75 Credit cards, unsecured loans and other retail lending 40,813 - (967) (3,825) (195) 35,826 Wholesale loans 142,172 (6,988) (62) (37,103) (23,963) 74,056 Total loans and advances at amortised cost 342,632 (6,988) (1,313) (200,131) (24,243) 109,957 Of which credit-impaired (Stage 3): Home loans 1,813 - (14) (1,796) - 3 Credit cards, unsecured loans and other retail lending 921 - (14) (237) (2) 668 Wholesale loans 2,525 - (4) (872) (232) 1,417 Total credit-impaired loans and advances at amortised cost 5,259 - (32) (2,905) (234) 2,088 Reverse repurchase agreements and other similar secured lending 9,031 - - (9,031) - - Trading portfolio assets: Debt securities 56,482 - - (391) - 56,091 Traded loans 8,348 - - (374) - 7,974 Total trading portfolio assets 64,830 - - (765) - 64,065 Financial assets at fair value through the income statement: Loans and advances 30,879 - (9) (23,677) - 7,193 Debt securities 1,693 - - (292) - 1,401 Reverse repurchase agreements 137,616 - (672) (136,537) - 407 Other financial assets 343 - - - - 343 Total financial assets at fair value through the income statement 170,531 - (681) (160,506) - 9,344 Derivative financial instruments 302,446 (233,080) (43,291) (4,773) (6,409) 14,893 Financial assets at fair value through other comprehensive income 77,927 - - (106) (1,385) 76,436 Other assets 850 - - - - 850 Total on-balance sheet 1,260,741 (240,068) (45,285) (375,312) (32,037) 568,039 Off-balance sheet: Contingent liabilities 21,609 - (1,095) (2,135) (282) 18,097 Loan commitments 333,049 - (128) (40,714) (1,520) 290,687 Total off-balance sheet 354,658 - (1,223) (42,849) (1,802) 308,784 Total 1,615,399 (240,068) (46,508) (418,161) (33,839) 876,823 Maximum exposure and effects of netting, collateral and risk transfer (audited) Maximum exposure Netting and set-off Cash collateral Non-cash collateral Risk transfer Net exposure As at 31 December 2019 £m £m £m £m £m £m On-balance sheet: Cash and balances at central banks 150,258 - - - - 150,258 Cash collateral and settlement balances 83,256 - - - - 83,256 Loans and advances at amortised cost: Home loans 154,479 - (294) (153,939) (70) 176 Credit cards, unsecured loans and other retail lending 55,296 - (778) (5,283) (258) 48,977 Wholesale loans 129,340 (7,636) (148) (39,981) (12,071) 69,504 Total loans and advances at amortised cost 339,115 (7,636) (1,220) (199,203) (12,399) 118,657 Of which credit-impaired (Stage 3): Home loans 1,809 - (2) (1,785) (14) 8 Credit cards, unsecured loans and other retail lending 1,074 - (12) (250) (2) 810 Wholesale loans 1,812 - (9) (909) (20) 874 Total credit-impaired loans and advances at amortised cost 4,695 - (23) (2,944) (36) 1,692 Reverse repurchase agreements and other similar secured lending 3,379 - - (3,379) - - Trading portfolio assets: Debt securities 52,739 - - (423) - 52,316 Traded loans 5,378 - - (134) - 5,244 Total trading portfolio assets 58,117 - - (557) - 57,560 Financial assets at fair value through the income statement: Loans and advances 22,692 - (14) (16,580) (57) 6,041 Debt securities 5,249 - - - - 5,249 Reverse repurchase agreements 96,887 - (1,132) (95,736) - 19 Other financial assets 763 - - - - 763 Total financial assets at fair value through the income statement 125,591 - (1,146) (112,316) (57) 12,072 Derivative financial instruments 229,236 (175,998) (33,411) (5,511) (5,564) 8,752 Financial assets at fair value through other comprehensive income 64,727 - - (305) (1,051) 63,371 Other assets 1,375 - - - - 1,375 Total on-balance sheet 1,055,054 (183,634) (35,777) (321,271) (19,071) 495,301 Off-balance sheet: Contingent liabilities 24,527 - (400) (4,412) (159) 19,556 Loan commitments 334,455 - (84) (47,008) (1,950) 285,413 Total off-balance sheet 358,982 - (484) (51,420) (2,109) 304,969 Total 1,414,036 (183,634) (36,261) (372,691) (21,180) 800,270 Loans and advances at amortised cost by stage (audited) Gross exposure Impairment allowance Net exposure Stage 1 Stage 2 Stage 3 Total Stage 1 Stage 2 Stage 3 Total As at 31 December 2020 £m £m £m £m £m £m £m £m £m Barclays UK 153,250 23,896 2,732 179,878 332 1,509 1,147 2,988 176,890 Barclays International a 21,048 5,500 1,992 28,540 396 1,329 1,205 2,930 25,610 Head Office 4,267 720 844 5,831 4 51 380 435 5,396 Total Barclays Group retail 178,565 30,116 5,568 214,249 732 2,889 2,732 6,353 207,896 Barclays UK 31,918 4,325 1,126 37,369 13 129 116 258 37,111 Barclays International a 79,911 16,565 2,270 98,746 288 546 859 1,693 97,053 Head Office 570 - 33 603 - - 31 31 572 Total Barclays Group wholesale b 112,399 20,890 3,429 136,718 301 675 1,006 1,982 134,736 Total loans and advances at amortised cost 290,964 51,006 8,997 350,967 1,033 3,564 3,738 8,335 342,632 Off-balance sheet loan commitments and financial guarantee contracts c 289,939 52,891 2,330 345,160 256 758 50 1,064 344,096 Total d 580,903 103,897 11,327 696,127 1,289 4,322 3,788 9,399 686,728 Loan impairment charge and loan loss rate Coverage ratio Loan impairment charge Loan loss rate Stage 1 Stage 2 Stage 3 Total As at 31 December 2020 % % % % £m bps Barclays UK 0.2 6.3 42.0 1.7 1,070 59 Barclays International a 1.9 24.2 60.5 10.3 1,680 589 Head Office 0.1 7.1 45.0 7.5 91 156 Total Barclays Group retail 0.4 9.6 49.1 3.0 2,841 133 Barclays UK - 3.0 10.3 0.7 154 41 Barclays International a 0.4 3.3 37.8 1.7 914 93 Head Office - - 93.9 5.1 - - Total Barclays Group wholesale b 0.3 3.2 29.3 1.4 1,068 78 Total loans and advances at amortised cost 0.4 7.0 41.5 2.4 3,909 111 Off-balance sheet loan commitments and financial guarantee contracts c 0.1 1.4 2.1 0.3 776 Other financial assets subject to impairment d 153 Total e 0.2 4.2 33.4 1.4 4,838 Notes a Private Banking have refined the methodology to classify £ 5 bn of their exposure between Wholesale and Retail during the year. b Includes Wealth and Private Banking exposures measured on an individual customer exposure basis, and excludes Business Banking exposures that are managed on a collective basis. The net impact is a difference in total exposure of £ 7,551 m of balances reported as wholesale loans i n the Loans and advances at amortised cost by product disclosure. c Excludes loan commitments and fi nancial guarantees of £ 9.5 bn carried at fair value. d 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 h ave a total gross exposure of £ 180.3 b n and impairment allowance of £ 165 m . This comprises £ 11 m ECL on £ 175.7 bn Stage 1 assets, £ 9 m on £ 4.4 bn Stage 2 fair value through other comprehensive income assets , other assets, cash collateral and settlement asse ts and £ 145 m on £ 154 m Stage 3 other assets. e The loan loss rate is 138 bps after applying th e total impairment charge of £ 4,838 m. Loans and advances at amortised cost by stage (audited) Gross exposure Impairment allowance Net exposure Stage 1 Stage 2 Stage 3 Total Stage 1 Stage 2 Stage 3 Total As at 31 December 2019 £m £m £m £m £m £m £m £m £m Barclays UK 143,097 23,198 2,446 168,741 198 1,277 974 2,449 166,292 Barclays International 27,886 4,026 1,875 33,787 352 774 1,359 2,485 31,302 Head Office 4,803 500 826 6,129 5 36 305 346 5,783 Total Barclays Group retail 175,786 27,724 5,147 208,657 555 2,087 2,638 5,280 203,377 Barclays UK 27,891 2,397 1,124 31,412 16 38 108 162 31,250 Barclays International 92,615 8,113 1,615 102,343 136 248 447 831 101,512 Head Office 2,974 - 37 3,011 - - 35 35 2,976 Total Barclays Group wholesale a 123,480 10,510 2,776 136,766 152 286 590 1,028 135,738 Total loans and advances at amortised cost 299,266 38,234 7,923 345,423 707 2,373 3,228 6,308 339,115 Off-balance sheet loan commitments and financial guarantee contracts b 321,140 19,185 935 341,260 97 170 55 322 340,938 Total c 620,406 57,419 8,858 686,683 804 2,543 3,283 6,630 680,053 Loan impairment charge and loan loss rate Coverage ratio Loan impairment charge Loan loss rate Stage 1 Stage 2 Stage 3 Total As at 31 December 2019 % % % % £m bps Barclays UK 0.1 5.5 39.8 1.5 661 39 Barclays International 1.3 19.2 72.5 7.4 999 296 Head Office 0.1 7.2 36.9 5.6 27 44 Total Barclays Group retail 0.3 7.5 51.3 2.5 1,687 81 Barclays UK 0.1 1.6 9.6 0.5 33 11 Barclays International 0.1 3.1 27.7 0.8 113 11 Head Office - - 94.6 1.2 - - Total Barclays Group wholesale a 0.1 2.7 21.3 0.8 146 11 Total loans and advances at amortised cost 0.2 6.2 40.7 1.8 1,833 53 Off-balance sheet loan commitments and financial guarantee contracts b - 0.9 5.9 0.1 71 Other financial assets subject to impairment c 8 Total d 0.1 4.4 37.1 1.0 1,912 Notes a Included in the above analysis are Wealth and Private Banking exposures measured on an indi vidual customer exposure basis, and excludes Business Banking exposures that are managed on a collective basis. The net impact is a difference in total exposure of £ 6,434 m of balances reported as wholesale loans in the Loans and advances at amortised cost by product disclosure. b Excludes loan commitments a nd financial guarantees of £ 17 .7 bn carried at fair value. c Other financial assets subject to impair ment not included in the table above include cash collateral and settlement balances, financial assets at fair value through other comprehensiv e income and other assets. These have a total gross exposure of £ 149.3 bn and impairment allowance of £ 24 m. This comprises £ 12 m ECL on £ 148.5 bn Stage 1 assets £ 2 m on £ 0.8 bn Stage 2 fair value through other comprehensive income assets, cash collateral and settlement balances and £ 10 m on £ 10 m Stage 3 other assets. d The loan loss rate is 55 bps after applying the t otal i mpairment charge of £ 1,912 m Loans and advances at amortised cost by product (audited) The table below p resents a breakdown of loans and advances at amortised cost and the impairment allowance with stage allocation by asset classification. Loans and advances at amortised cost by product (audited) Stage 2 As at 31 December 2020 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 Home loans 138,639 16,651 1,785 876 19,312 2,234 160,185 Credit cards, unsecured loans and other retail lending 33,021 9,470 544 306 10,320 3,172 46,513 Wholesale loans 119,304 19,501 1,097 776 21,374 3,591 144,269 Total 290,964 45,622 3,426 1,958 51,006 8,997 350,967 Impairment allowance Home loans 33 57 13 14 84 421 538 Credit cards, unsecured loans and other retail lending 680 2,382 180 207 2,769 2,251 5,700 Wholesale loans 320 650 50 11 711 1,066 2,097 Total 1,033 3,089 243 232 3,564 3,738 8,335 Net exposure Home loans 138,606 16,594 1,772 862 19,228 1,813 159,647 Credit cards, unsecured loans and other retail lending 32,341 7,088 364 99 7,551 921 40,813 Wholesale loans 118,984 18,851 1,047 765 20,663 2,525 142,172 Total 289,931 42,533 3,183 1,726 47,442 5,259 342,632 Coverage ratio % % % % % % % Home loans - 0.3 0.7 1.6 0.4 18.8 0.3 Credit cards, unsecured loans and other retail lending 2.1 25.2 33.1 67.6 26.8 71.0 12.3 Wholesale loans 0.3 3.3 4.6 1.4 3.3 29.7 1.5 Total 0.4 6.8 7.1 11.8 7.0 41.5 2.4 As at 31 December 2019 Gross exposure £m £m £m £m £m £m £m Home loans 135,713 14,733 1,585 725 17,043 2,155 154,911 Credit cards, unsecured loans and other retail lending 46,012 9,759 496 504 10,759 3,409 60,180 Wholesale loans 117,541 9,374 374 684 10,432 2,359 130,332 Total 299,266 33,866 2,455 1,913 38,234 7,923 345,423 Impairment allowance Home loans 22 37 14 13 64 346 432 Credit cards, unsecured loans and other retail lending 542 1,597 159 251 2,007 2,335 4,884 Wholesale loans 143 284 9 9 302 547 992 Total 707 1,918 182 273 2,373 3,228 6,308 Net exposure Home loans 135,691 14,696 1,571 712 16,979 1,809 154,479 Credit cards, unsecured loans and other retail lending 45,470 8,162 337 253 8,752 1,074 55,296 Wholesale loans 117,398 9,090 365 675 10,130 1,812 129,340 Total 298,559 31,948 2,273 1,640 35,861 4,695 339,115 Coverage ratio % % % % % % % Home loans - 0.3 0.9 1.8 0.4 16.1 0.3 Credit cards, unsecured loans and other retail lending 1.2 16.4 32.1 49.8 18.7 68.5 8.1 Wholesale loans 0.1 3.0 2.4 1.3 2.9 23.2 0.8 Total 0.2 5.7 7.4 14.3 6.2 40.7 1.8 Movement in gross exposures and impairment allowance including provisions for loan commitments and financial guarantees The following tables present a reconciliation of the opening to the closing balance of the exposure and impairment allowance. An explanation of the terms: 12-month ECL, lifetime ECL and credit- impaired is included in Note 7 . Transfers between stages in the tables have been reflected as if they had taken place at the beginning of the year. The movements are measured over a 12-month period. Loans and advances at amortised cost (audited) Stage 1 Stage 2 Stage 3 Total Gross exposure ECL Gross exposure ECL Gross exposure ECL Gross exposure ECL £m £m £m £m £m £m £m £m Home loans As at 1 January 2020 135,713 22 17,043 64 2,155 346 154,911 432 Transfers from Stage 1 to Stage 2 (8,724) (1) 8,724 1 - - - - Transfers from Stage 2 to Stage 1 4,618 14 (4,618) (14) - - - - Transfers to Stage 3 (308) - (420) (10) 728 10 - - Transfers from Stage 3 47 1 219 2 (266) (3) - - Business activity in the year 22,548 7 714 2 4 - 23,266 9 Changes to models used for calculation a - - - - - - - - Net drawdowns, repayments, net re-measurement and movements due to exposure and risk parameter changes (6,195) (9) (841) 42 (57) 105 (7,093) 138 Final repayments (9,060) (1) (1,509) (3) (308) (15) (10,877) (19) Disposals c - - - - - - - - Write-offs d - - - - (22) (22) (22) (22) As at 31 December 2020 e 138,639 33 19,312 84 2,234 421 160,185 538 Credit cards, unsecured loans and other retail lending As at 1 January 2020 46,012 542 10,759 2,007 3,409 2,335 60,180 4,884 Transfers from Stage 1 to Stage 2 (6,571) (134) 6,571 134 - - - - Transfers from Stage 2 to Stage 1 3,080 482 (3,080) (482) - - - - Transfers to Stage 3 (712) (25) (1,162) (398) 1,874 423 - - Transfers from Stage 3 76 39 67 12 (143) (51) - - Business activity in the year 5,598 67 324 83 59 28 5,981 178 Changes to models used for calculation a - 13 - 296 - - - 309 Net drawdowns, repayments, net re-measurement and movements due to exposure and risk parameter changes b (9,678) (229) (2,706) 1,174 (10) 1,353 (12,394) 2,298 Final repayments (3,291) (67) (270) (37) (204) (84) (3,765) (188) Disposals c (1,493) (8) (183) (20) (204) (144) (1,880) (172) Write-offs d - - - - (1,609) (1,609) (1,609) (1,609) As at 31 December 2020 e 33,021 680 10,320 2,769 3,172 2,251 46,513 5,700 Wholesale loans As at 1 January 2020 117,541 143 10,432 302 2,359 547 130,332 992 Transfers from Stage 1 to Stage 2 (12,531) (35) 12,531 35

Significant accounting polici_2

Significant accounting policies (Policy)	12 Months Ended
	Dec. 31, 2020
1. Significant accounting policies
Compliance with International Financial Reporting Standards	The consolidated financial statements of the Group , and the separate financial statements of Barclays PLC , have been 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 interp retations (IFRICs) as issued by the IASB and adopted pursuant to Regulation (EC) No 1606/2002 as it applies in the European Union. These standards have also been endorsed by the UK . The principal accounting policies applied in the preparation of the consolidated and separate financial statements are set out below, and in the relevant notes to the financi al statements. These policies have been consistently applied with the exception of the early adoption of Interest Rate Benchmark Reform – Phase 2 (A mendments to IFRS 9, IAS 39 , IFRS 7 , IFRS 4 and IFRS16) which w as applied from 1 January 20 20 .
Basis of preparation	The consolidated and separate financial statements have been prepared under the historical cost convention modified to include the fair valuation of investment property, and particular financial instruments, to the extent required or permitted under IFRS as set out in the relevant accounting policies. They are stated in millions of pounds Sterling (£m), the functional currency of Barclays PLC . The financial statements have been prepared on a going concern basis, in accordance with the Companies Act 2006 as applicable to companies using IFRS. The financial statements are prepared on a going concern basis, as the Board is satisfied that the Group and the parent company have the resources to continue in business for a period of at least 12 months fr om approval of the financial statements. In making this assessment, the Board has 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 t o 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 assessment is based upon business plans which contain future projections of profitability taken from t he Group’s three year medium-term plan as well as projections of regulatory capital requirements and business funding needs. The WCR also includes an assessment of the impact of internally generated stress testing scenarios on the liquidity and capital req uirement forecasts. The stress tests used were based upon an assessment of reasonably possible downside economic scenarios that the Group could experience. The WCR showed that the Group had sufficient capital in place to support its future business requi rements and remained above its regulatory minimum requirements in the stress scenarios. Accordingly, the Directors concluded that there was a reasonable expectation that the Group and parent company has adequate resources to continue as a Going Concern for a period of at least 12 months from the date of approval of the financial statements .
Consolidation	(i) Consolidation The Group applies IFRS 10 Consolidated financial statements . The consolidated financial statements combine the financial statements of Barclays PLC and all its subsidiaries. Subsidiaries are entities over which Barclays PLC has control. The Group has control over another entity when the Group has all of the following: 1) power over the relevant activities of the investee, for example through voting or other rights 2) exposure to, or rights to, variable returns from it s involvement with the investee, and 3) the ability to affect those returns through its power over the investee. The assessment of control is based on the consideration of all facts and circumstances. The Group reassesses whether it controls an inves tee if facts and circumstances indicate that there are changes to one or more of the three elements of control. Intra-group transactions and balances are eliminated on consolidation. Consistent accounting policies are used throughout the Group for th e purposes of the consolidation. Changes in ownership interests in subsidiaries are accounted for as equity transactions if they occur after control has already been obtained and they do not result in loss of control. As the consolidated financial statem ents include partnerships where the Group member is a partner, advantage has been taken of the exemption under Regulation 7 of the Partnership (Accounts) Regulations 2008 with regard to preparing and filing of individual partnership financial statemen ts. Details of the principal subsidiaries are given in Note 34 .
Foreign currency translation	(ii) Foreign currency translation The Group applies IAS 21 The Effects of Changes in Foreign Exchange Rates . Transactions in foreign currencies are translated into Sterlin g at the rate ruling on the date of the transaction. Foreign currency monetary balances are translated into Sterling at the period end exchange rates. Exchange gains and losses on such balances are taken to the income statement. Non-monetary foreign curre ncy balances in relation to items measured in terms of historical cost are carried at historical transaction date exchange rates. Non-monetary foreign currency balances in relation to items measured at fair value are translated using the exchange rate at t he date when the fair value was measured. The Group ’s foreign operations (including subsidiaries, joint ventures, associates and branches) based mainly outside the UK may have different functional currencies. The functional currency of an operation is the currency of the main economy to which it is exposed. Prior to consolidation (or equity accounting) the assets and liabilities of non-Sterling operations are translated at the period end exchange rate and items of income, expense and other comprehensive income are translated into Sterling at the rate on the date of the transactions. Exchange differences arising on the translation of foreign operations are included in currency translation reserves within equity. These are transferred to the income statement when the Group disposes of the e ntire interest in a foreign operation, when partial disposal results in the loss of control of an interest in a subsidiary, when an investment previously accounted for using the equity method is accounted for as a financial asset, or on the disposal of an autonomous foreign operation within a branch.
Financial assets and liabilities	(iii) Financial assets and liabilities The Group applies IFRS 9 Financial Instruments to the recognition, classification and measurement, and derecognition of financial assets and financial liabilities an d the impairment of financial assets. T he Group applies the requirements of IAS 39 Financial Instruments: Recognition and Measurement for hedge accounting purposes. Recognition The Group recognises financial assets and liabilities when it becom es a party to the terms of the contract. Trade date or settlement date accounting is applied depending on the classification of the financial asset. Classification and measurement Financial assets are classified on the basis of two criteria: i) the business model within which financial assets are managed, and ii) their contractual cash flow characteristics (whether the cash flows represent ‘solely payments of principal and interest’ (SPPI)). The Group assesses the business model criteri a at a portfolio level. Information that is considered in determining the applicable business model includes (i) policies and objectives for the relevant portfolio, (ii) how the performance and risks of the portfolio are managed, evaluated and reported to management, and (iii) the frequency, volume and timing of sales in prior periods, sales expectation for future periods, and the reasons for such sales. The contractual cash flow characteristics of financial assets are assessed with reference to whether th e cash flows represent SPPI. In assessing whether contractual cash flows are SPPI compliant, interest is defined as consideration primarily for the time value of money and the credit risk of the principal outstanding. The time value of money is defined as the element of interest that provides consideration only for the passage of time and not consideration for other risks or costs associated with holding the financial asset. Terms that could change the contractual cash flows so that it would not meet the co ndition for SPPI are considered, including: (i) contingent and leverage features, (ii) non-recourse arrangements and (iii) features that could modify the time value of money. Financial assets are measured at amortised cost if they are held within a busine ss model whose objective is to hold financial assets in order to collect contractual cash flows, and their contractual cash flows represent SPPI. Financial assets are measured at fair value through other comprehensive income if they are held within a busi ness model whose objective is achieved by both collecting contractual cash flows and selling financial assets, and their contractual cash flows represent SPPI. Other financial assets are measured at fair value through profit and loss. There is an option t o make an irrevocable election on initial recognition for non traded equity investments to be measured at fair value through other comprehensive income, in which case dividends are recognised in profit or loss, but gains or losses are not reclassified to p rofit or loss upon derecognition, and the impairment requirements of IFRS 9 do not apply. The accounting policy for each type of financial asset or liability is included within the relevant note for the item. The Group ’s policies for determining the fair values of the assets and liabilities are set out in Note 17 . Derecognition The Group derecognises a financial asset, or a portion of a financial asset, from its balance sheet where the contractual rights to cash flows from the asset have expired, or have been transferred, usually by sale, and with them either substantially all the risks and rewards of the asset or significant risks and rewards, along with the unconditional ability to sell or pledge the asset. Financial liabilities ar e de-recognised when the liability has been settled, has expired or has been extinguished. An exchange of an existing financial liability for a new liability with the same lender on substantially different terms – generally a difference of 10% or more in t he present value of the cash flows or a substantive qualitative amendment – is accounted for as an extinguishment of the original financial liability and the recognition of a new financial liability. Transactions in which the Group transfers assets a nd liabilities, portions of them, or financial risks associated with them can be complex and it may not be obvious whether substantially all of the risks and rewards have been transferred. It is often necessary to perform a quantitative analysis. Such an a nalysis compares the Group ’s exposure to variability in asset cash flows before the transfer with its retained exposure after the transfer. A cash flo w analysis of this nature may require judgement. In particular, it is necessary to estimate the asset’s expected future cash flows as well as potential variability around this expectation. The method of estimating expected future cash flows depends on the nature of the asset, with market and market-implied data used to the greatest extent possible. The potential variability around this expectation is typically determined by stressing underlying parameters to create reasonable alternative upside and downside scenarios. Probabilities are then assigned to each scenario. Stressed parameters may include default rates, loss severity, or prepayment rates
Accounting for reverse repurchase and repurchase agreements including other similar lending and borrowing	Accounting for reverse repurchase and repurchase agreements including other similar lending and borrowing Reverse repurchase agreements (and stock borrowing or similar transaction) are a form of secured lending whereby the Group provides a loan or cash collateral in exchange for the transfer of collateral, generally in the form of marketable securities subject to an agreement to transfer the securities back at a fixed price in the future. Repurchase agreements are where the Group obtains such loans or cash collateral, in exchange for the transfer of col lateral. The Group purchases (a reverse repurchase agreement) or borrows securities subject to a commitment to resell or return them. The securities are not included in the balance sheet as the Group does not acquire the risks and rewards of ownership. Consideration paid (or cash collateral provided) is accounted for as a loan asset at amortised cost, unless it is designated or mandatorily at fair value through profit and loss. The Group may also sell (a repurchase agreement) or lend se curities subject to a commitment to repurchase or redeem them. The securities are retained on the balance sheet as the Group retains substantially all the risks and rewards of ownership. Consideration received (or cash collateral provided) is accounte d for as a financial liability at amortised cost, unless it is designated at fair value through profit and loss.
Issued debt and equity instruments	(iv) Issued debt and equity instruments The Group applies IAS 32, Financial Instruments: Presentation , to determine whether funding is ei ther a financial liability (debt) or equity. Issued financial instruments or their components are classified as liabilities if the contractual arrangement results in the Group having an obligation to either deliver cash or another financial asset, or a variable number of equity shares, to the holder of the instrument. If this is not the case, the instrument is generally an equity instrument and the proceeds included in equity, net of transaction costs. Dividends and other returns to equity holders are recognised when paid or declared by the members at the AGM and treated as a deduction from equity. Where issued financial instruments contain both liability and equity components, these are accounted for separately. The fair value of the debt is estimate d first and the balance of the proceeds is included within equity.
Changes in the basis for determining contractual cash flows	Changes in the basis for determining contractual cash flows A change in the basis of determini ng the contractual cash flows of a financial instrument that are required by the reform is accounted for by updating the effective interest rate, without the recognition of an immediate gain or loss. This practical expedient is only applied where (1) the c hange to the contractual cash flows is necessary as a direct consequence of the reform and (2) the new basis for determining the contractual cash flows is economically equivalent to the previous basis. For changes made in addition to those required by the reform, the practical expedient is applied first, after which the normal IFRS 9 requirements for modifications of financial instruments is applied.
Hedge accounting	Hedge accounting The IAS 39 requirements in respect of hedge accounting have been amended in two phases. Th e Phase 1 amendments, which were adopted by the Group in 2019, provide relief to the hedge accounting requirements prior to changing a hedge relationship due to the interest rate benchmark reform (refer to Note 14 ). The Phase 2 amendments prov ide relief when changes are made to hedge relationships as a result of the interest rate benchmark reform. The Phase 2 amendments adopted by the Group are described below.  Under a temporary exception, changes to the hedge designation and hedge documentatio n due to the interest rate benchmark reform would not constitute the discontinuation of the hedge relationship nor the designation of a new hedging relationship.  In respect of the retrospective hedge effectiveness assessment, the Group may elect on a hedge -by-hedge basis to reset the cumulative fair value changes to zero when the exception to the retrospective assessment ends (Phase 1 relief). Any hedge ineffectiveness will continue to be measured and recognised in full in profit or loss.  Amounts accumulated in the cash flow hedge reserve would be deemed to be based on the alternative benchmark rate (on which the hedge future cash flows are determined) when there is a change in basis for determining the contractual cash flows.  For hedges of groups of items (such as those forming part of a macro cash flow hedging strategy), the amendments provide relief for items within a designated group of items that are amended for changes directly required by the reform.  In respect of whether a risk component of a hedged item is separately identifiable, the amendments provide temporary relief to entities to meet this requirement when an alternative risk free rate (RFR) financial instrument is designated as a risk component. These amendments allow entities upon des ignation of the hedge to assume that the separately identifiable requirement is met if the entity reasonably expects the RFR risk will become separately identifiable within the next 24 months. This relief applies to each RFR on a rate-by-rate basis and sta rts when the entity first designates the RFR as a non-contractually specified risk component. The amendments to IFRS 7 require certain disclosures to be made to enable users of financial statements to understand the effect of interest rate benchmark reform on an entity’s financial instruments and risk management strategy. Refer to Note 41 where these disclosures have been included.
Critical accounting estimates and judgements	The preparation of financial statement s in accordance with IFRS requires the use of estimates. It also requires management to exercise judgement in applying the accounting policies. The key areas involving a higher degree of judgement or complexity or areas where assumptions are significant to the consolidated and individual financial statements are highlighted under the relevant note. Critical accounting estimates and judgements are disclosed in:  Credit impairment charges on page [00]  Tax on page [00]  Fair value of financial instruments on pa ge [00]  Goodwill and intangible assets on page [00]  Pensions and post-retirement benefits – obligations on page [00]  Provisions including conduct and legal, competition and regulatory matters on page [00].
Presentation of segmental reporting	Presentation of segmental reporting The Group ’s segmental reporting is in accordance with IFRS 8 Operating Segments . Operating segments are reported in a manner consistent with the internal reporting provided to the Executive Committee, which is responsible for allocating resources and assessing performance of the operating segments, and has been identified as the chief operating decision maker. All transactions between business segments are conducted on an arm’s- length basis, with intra-segment revenue and costs being eliminated in Head Office. Income and expenses directly associated with each segment are included in determining business segment performance.
Accounting for interest income and expense	Accounting for interest income and expenses Interest income on loans and advances at amortised cost and financial assets at fair value through other comprehensive income , and interest expense on financial liabilities held at amortised cost, are calculated using the effective interest method which allocates interest, and direct and incremental fees and costs, over the expected lives of the assets and liabilities. The effective interest method requires the Group to estimate future cash flows, in some cases based on its experience of cust omers’ behaviour, considering all contractual terms of the financial instrument, as well as the expected lives of the assets and liabilities. The Group incurs certain costs to originate credit card balances with the most significant being co-brand p artner fees. To the extent these costs are attributed to customers that continuously carry an outstanding balance (revolvers) and incremental to the origination of credit card balances , they are capitalised and subsequently included within the calculation of the effective interest rate. They are amortised to inter est income over the period of expected repayment of the originated balance. Costs attributed to customers that settle their outstanding balances each period ( transactors ) are deferred on the balance sheet as a cost of obtaining a contract and amortised to fee and commission expense over the life of the customer relationship (refer to Note 4 ). There are no other individual estimates involved in the calculation of effective interest rates that are material to the results or financial position
Accounting for net fee and commission income	Accounting for net fee and commission income The Group applies IFRS 15 Revenue from Contracts with Customers. IFRS 15 establishes a five-step model governing revenue recognition. The five-step model requires the Group to (i) identify the contract with the customer, (ii) identify each of the performance obligations included in the contract, (iii) determine the amount of consideration in the contract, (iv) allocate the consideration to each of the identified performance obligations and (v) recognise revenue as each performance obligation is satisfied. The Group recognises fee and commission income charged for services provided by the Group as the ser vices are provided, for example, on comp letion of the underlying transaction . Where the contractual arrangements also result in the Group recognising financial instruments in scope of IFRS 9, such financial instruments are initially recognised at fair value in accordance with IFRS 9 before applying the provisions of IFRS 1 5 .
Accounting for net trading income	5 Net trading income Accounting for net trading income In accordance with IFRS 9, trading positions are held at fair value, and the resulting gains and losses are included in the income statement, together with interest and dividends arising from long and short positions and funding costs relating to trading activities. Income arises from both the sale and purchase of trading positions, margins which are achieved through market making and customer business and from changes in fair value caus ed by movements in interest and exchange rates, equity prices and other market variables. Gains or losses on non-trading financial instruments designated or mandatorily at fair value with changes in fair value recognised in the income statement are includ ed in net trading income where the business model is to manage assets and liabilities on a fair value basis which includes use of derivatives or where an instrument is designated at fair value to eliminate an accounting mismatch and the related instrument' s gain and losses are reported in trading income.
Accounting for net investment income	Accounting for net investment income Dividends are recognised when the right to receive the dividend has been established. Other accounting policies relating to net investment income are set out in Note 13 and Note 15 .
Accounting for the impairment of financial assets	Accounting for the impairment of financial assets Impairment In accordance with IFRS 9, t he Group is required to recognise expected credit losses (ECLs) based on unbiased forward-looking information for all financial assets at amortised cost, lease receivables, debt financial assets at fair value through other comprehensive income, loan commitments and financial guarantee con tracts. At the reporting date, an allowance (or provision for loan commitments and financial guarantees) is required for the 12 month (Stage 1) ECLs. If the credit risk has significantly increased since initial recognition (Stage 2), or if the financial instrument is credit impaired (Stage 3), an allowance (or provision) should be recognised for the lifetime ECLs. The measurement of ECL is calculated using three main components: (i) probability of default (PD) (ii) loss given default (LGD) and (iii) the exposure at default (EAD). The 12 month and lifetime ECLs are calculated by multiplying the respective PD, LGD and the EAD. The 12 month and lifetime PDs represent the PD occurring over the next 12 months and the remaining maturity of the instrument re spectively. The EAD represents the expected balance at default, taking into account the repayment of principal and interest from the balance sheet date to the default event together with any expected drawdowns of committed facilities. The LGD represents ex pected losses on the EAD given the event of default, taking into account, among other attributes, the mitigating effect of collateral value at the time it is expected to be realised and the time value of money. Determining a significant increase in cred it risk since initial recognition: The Group assesses when a significant increase in credit risk has occurred based on quantitative and qualitative assessments. The credit risk of an exposure is considered to have significantly increased when: i) Quant itative test The annualised lifetime PD has increased by more than an agreed threshold relative to the equivalent at origination. PD deterioration thresholds are defined as percentage increases, and are set at an origination score band and segment level t o ensure the test appropriately captures significant increases in credit risk at all risk levels. Generally, thresholds are inversely correlated to the origination PD, i.e. as the origination PD increases, the threshold value reduces. The assessment of the point at which a PD increase is deemed ‘significant’, is based upon analysis of the portfolio ’ s risk profile against a common set of principles and performance metrics (consistent across both retail and wholesale businesses), incorporating expert credi t judgement where appropriate. Application of quantitative PD floors does not represent the use o f the low credit risk exemption as exposures can separately move into Stage 2 via the qualitative route described below. Wholesale assets apply a 100% increa se in PD and 0.2% PD floor to determine a significant increase in credit risk. Retail assets apply bespoke relative increase and absolute PD thresholds based on product type and origination PD. Thresholds are subject to maximums defined by Group poli cy and typically apply minimum relative thresholds of 50-100% and a maximum relative threshold of 400%. For existing/historical exposures where origination point scores or data are no longer available or do not represent a comparable estimate of lifetime PD, a proxy origination score is defined, based upon:  back-population of the approved lifetime PD score either to origination date or, where this is not fe asible, as far back as possible (subject to a data start point no later than 1 January 2015); or  use of available historical account performance data and other customer information, to derive a comparable ‘proxy’ estimation of origination PD. ii) Qualitative test This is relevant for accounts that meet the portfolio’s ‘high risk’ criteria and are subject to closer credit monitoring. High risk customers may not be in arrears but either through an event or an observed behaviour exhibit credit distress. The definition and assessment of high risk includes as wide a range of information as reasonably available, such as industry and Group-wide customer level data, including but not limited to bureau scores and high consumer indebtedness index, wherever possible or relevant. Whilst the high risk populations applied for IFRS 9 impairment purposes are aligned with r isk management processes, they are also regularly reviewed and validated to ensure that they capture any incremental segments where there is evidence of credit deterioration. iii) Backstop criteria This is relevant for accounts that are more than 30 calendar days past due. The 30 days past due criteria is a backstop rather than a primary driver of moving exposures into Stage 2. The criteria for determining a significant increase in credit risk for assets with bullet repayments follows the same principle as al l other assets, i.e. quantitative, qualitative and backstop tests are all applied. Exposures will move back to Stage 1 once they no longer meet the criteria for a significant increase in credit risk . This means that, at a minimum all payments must be up-t o-date, the PD deterioration test is no longer met, the account is no longer classified as high risk, and the customer has evidenced an ability to maintain future payments. Exposures are only removed from Stage 3 and re-assigned to Stage 2 once the origi nal default trigger event no longer applies. Exposures being removed from Stage 3 must no longer qualify as credit impaired, and: a) the obligor will also have demonstrated consistently good payment behaviour over a 12-month period, by making all consecuti ve contractual payments due and, for forborne exposures, the relevant EBA defined probationary period has also been successfully completed or; b) (for non-forborne exposures) the performance conditions are defined and approved within an appropriately sanct ioned restructure plan, including 12 months’ payment history have been met. Management overlays and other exceptions to model outputs are applied only if consistent with the objective of identifying significant increases in credit risk. Forward-looking information The measurement of ECL involves complexity and judgement, including estimation of PD, LGD, a range of unbiased future economic scenarios, estimation of expected lives (where contractual life is not appropriate), and estimation of EAD and assess ing significant increases in credit risk. Credit losses are the expected cash shortfalls from what is contractually due over the expected life of the financial instrument, discounted at the original effective interest rate (EIR). ECLs are the unbiased pro bability-weighted credit losses determined by evaluating a range of possible outcomes and considering future economic conditions. The Group uses a five-scenario model to calculate ECL. An external consensus forecast is assembled from key sources, including HM Treasury (short and medium term forecasts), Bloomberg (based on median of economic forecasts) and the Urban Land Institute (for US House Prices), which forms the b aseline scenario. In addition, two adverse scenarios (Downside 1 and Downside 2) and two favourable scenarios (Upside 1 and Upside 2) are derived, with associated probability weightings. The adverse scenarios are calibrated to a similar severity to internal stress tests, whilst also considering IFRS 9 specific sensitivities and non-linearity. Downside 2 is benchmarked to the Bank of England’s annual cyclical scenarios and to the most severe scenario from Moody’s inventory, but is not designed to be the same. The favourable scenarios are calibrated to be symmetric to the adverse scenarios, subject to a ceiling calibrated to relevant recent favourable benchmark scenarios. The scenarios include eight economic v ariables (GDP, unemployment, House Price Index (HPI) and base rates in both the UK and US markets) and expanded variables using statistical models based on historical correlations. The upside and downside shocks are designed to evolve over a five-year stress horizon, with all five scenarios converging to a steady state after approximately eight years. The methodology for estimating prob ability weights for each of the scenarios involves a comparison of the distribution of key historic al UK and US macroeconomic variables against the forecast paths of the five scenarios. The methodology works such that the baseline (reflecting current conse nsus outlook) has the highest weight and the weights of adverse and favourable scenarios depend on the deviation from the baseline; the further from the baseline, the smaller the weight. A single set of five scenarios is used across all portfolios and all five weights are normalised to equate to 100%. The same scenarios and weights that are used in the estimation of expected credit losse s are also used for the Group internal planning purposes. The impacts across the portfolios are different because of the s ensitivities of each of the portfolios to specific macroeconomic variables, for example, mortgages are highly sensitive to house prices, and credit cards and unsecured consumer loans are highly sensitive to unemployment. Definition of default, credit impaired assets, write-offs, and interest income recognition The definition of default for the purpose of determining ECLs, and for internal credit risk management purposes, has been aligned to the Regulatory Capital CRR Article 178 definition of d efault, to maintain a consistent approach with IFRS 9 and associated regulatory guidance. The Regulatory Capital CRR Article 178 definition of default considers indicators that the debtor is unlikely to pay, includes exposures in forbearance and is no late r than when the exposure is more than 90 days past due or 180 days past due in the case of UK mortgages. When exposures are identified as credit impaired at the time when they are purchased or originated interest income is calculated on the carryin g value net of the impairment allowance. An asset is considered credit impaired when one or more events occur that have a detrimental impact on the estimated future cash flows of the financial asset. This comprises assets defined as defaulted and other in dividually assessed exposures where imminent default or actual loss is identified. Uncollectable loans are written off against the related allowance for loan impairment on completion of the Group ’s internal processes and when all reasonably expected recoverable amounts have been collected. Subsequent recoveries of amounts previously written off are credited to the income statement. The timing and extent of write-offs may involve some element of subjective judgement. Nevertheless, a write-off will ofte n be prompted by a specific event, such as the inception of insolvency proceedings or other formal recovery action, which makes it possible to establish that some or the entire advance is beyond realistic prospect of recovery. Accounting for purchased fin ancial guarantee contracts The Group may enter into a financial guarantee contract which requires the issuer of such contract to reimburse the Group for a loss it incurs because a specified debtor fails to make payment when due in accordance with the terms of a debt instrument. For these separate financial guarantee contracts, the Group recognises a reimbursement asset aligned with the recognition of the underlying ECLs, if it is considered virtually certain that a reimbursement would be rece ived if the specified debtor fails to make payment when due in accordance with the terms of the debt instrument. Loan modifications and renegotiations that are not credit-impaired When modification of a loan agreement occurs as a result of commercial rest ructuring activity rather than due to the credit risk of the borrower, an assessment must be performed to determine whether the terms of the new agreement are substantially different from the terms of the existing agreement. This assessment considers both the change in cash flows arising from the modified terms as well as the change in overall instrument risk profile. In respect of payment holidays granted to borrowers which are not due to forbearance, if the revised cash flows on a present value basis (bas ed on the original EIR) are not substantially different from the original cash flows, the loan is not considered to be substantially modified. Where terms are substantially different, the existing loan will be derecognised and a new loan will be recognised at fair value, with any difference in valuation recognised immediately within the income statement, subject to observability criteria. Where terms are not substantially different, the loan carrying value will be adjusted to reflect the present value of modified cash flows discounted at the original EIR, with any resulting gain or loss recognised immediately within the income statement as a modification gain or loss. Note 1 sets out details for changes in the basis of determining the contractua l cash flows of a financial instrument that are required by interest rate benchmark reform. Expected life Lifetime ECLs must be measured over the expected life. This is restricted to the maximum contractual life and takes into account expected prepayment, extension, call and similar options. The exceptions are certain revolver financial instruments, such as credit cards and bank overdrafts, that include both a drawn and an undrawn component where the entity’s contractual ability to demand repayment and can cel the undrawn commitment does not limit the entity’s exposure to credit losses to the contractual notice period. For revolving facilities, expected life is analytically derived to reflect the behavioural life of the asset, i.e. the full period over which the business expects to be exposed to credit risk. Behavioural life is typically based upon historical analysis of the average time to default, closure or withdrawal of facility. Where data is insufficient or analysis inconclusive, an additional ‘maturity factor’ may be incorporated to reflect the full estimated life of the exposures, based upon experienced judgement and/or peer analysis. Potential future modifications of contracts are not taken into account when determining the expected life or EAD until they occur. Discounting ECLs are discounted at the EIR at initial recognition or an approximation thereof and consistent with income recognition. For loan commitments the EIR is the rate that is expected to apply when the loan is drawn down and a financia l asset is recognised. Issued financial guarantee contracts are discounted at the risk free rate. Lease receivables are discounted at the rate implicit in the lease. For variable/floating rate financial assets, the spot rate at the reporting date is used a nd projections of changes in the variable rate over the expected life are not made to estimate future interest cash flows or for discounting. Modelling techniques ECLs are calculated by multiplying three main components, being the PD, LGD and the EAD, dis counted at the original EIR. The regulatory Basel Committee of Banking Supervisors (BCBS) ECL calculations are leveraged for IFRS 9 modelling but adjusted for key differences which include:  BCBS requires 12 month through the economic cycle losses whereas IFRS 9 requires 12 months or lifetime point in time losses based on conditions at the reporting date and multiple forecasts of the future economic conditions over the expected lives;  IFRS 9 models do not include c ertain conservative BCBS model floors and downturn assessments and require discounting to the reporting date at the original EIR rather than using the cost of capital to the date of default;  Management adjustments are made to modelled output to account for situations where known or expected risk factors and information have not been considered in the modelling process, for example forecast economic scenarios for uncertain political events; and  ECL is measured at the individual financial instrument level, ho wever a collective approach where financial instruments with similar risk characteristics are grouped together, with apportionment to individual financial instruments, is used where effects can only be seen at a collective level, for example for forward-lo oking information. For the IFRS 9 impairment assessment, the Group ’s risk models are used to determine the PD, LGD and EAD. For Stage 2 and 3, the Group applies lifetime PDs but uses 12 month PDs for Stage 1. The ECL drivers of PD, EAD and LGD a re modelled at an account level which considers vintage, among other credit factors. Also, the assessment of significant increase in credit risk is based on the initial lifetime PD curve, which accounts for the different credit risk underwritten over time. Forbearance A financial asset is subject to forbearance when it is modified due to the credit distress of the borrower. A modification made to the terms of an asset due to forbearance will typically be assessed as a non-substantial modification that does not result in derecognition of the original loan, except in circumstances where debt is exchanged for equity. Both performing and non-performing forbearance assets are classified as Stage 3 except where it is established that the concession granted has not resulted in diminished financial obligation and that no other regulatory definition of default criteria ha ve been triggered, in which case the asset is classified as Stage 2. The minimum probationary period for non-performing forbearance is 12 months a nd for performing forbearance, 24 months. Hence, a minimum of 36 months is required for non-performing forbearance to move out of a forborne state. No financial instrument in forbearance can transfer back to Stage 1 until all of the Stage 2 thresholds are no longer met and can only move out of Stage 3 when no longer credit impaired. Critical accounting estimates and judgements IFRS 9 impairment involves several important areas of judgement, including estimating forward looking modelled parameters (PD, LGD and EAD), developing a range of unbiased future economic scenarios, estimating expected lives and assessing significant increases i n credit risk, based on the Group ’s experience of managing credit risk. The determination of expected life is most material for Barclays credit card portfolios which is obtained via behavioural life analysis to materially capture the risk of these facilities. Within the retail and small businesses portfolios, which comprise large numbers of small homogenous assets with similar risk characteristics where credit scoring techniques are generally used, the impairment allowance is calculated using forward looking modelled parameters which are typically run at account level. There are many models in use, each tailored to a product, line of business or customer category. Judgement and knowledge is needed in selecting the statistical methods to use when the models are developed or revised. The impairment allowance reflected in the financial statements for these portfolios is therefore considered to be reasonable and supportable. The impairment charge reflecte d in the income statement for retail portfolios is £ 3,116 m (201 9 : £ 1 ,696 m; 201 8 : £ 1,598 m) of the total impairme nt charge on loans and advances and off balance sheet loan commitments and financial guarantee contracts . For individually significant assets in Stage 3, impairment allowances are calculated on an individual basis and all relevant considerations that have a bearing on the expected future cash flows across a range of economic scenarios are taken into account. These considerations can be particularl y subjective and can include the business prospects for the customer, the realisable value of collateral, the Group ’s position relative to other claimants, the reliability of customer information and the likely cost and duration of the work-out proces s. The level of the impairment allowance is the difference between the value of the discounted expected future cash flows (discounted at the loan’s original effective interest rate), and its carrying amount. Furthermore, judgements change with time as new information becomes available or as work-out strategies evolve, resulting in frequent revisions to the impairment allowance as individual decisions are taken. Changes in these estimates would result in a change in the allowances and have a direct impact on the impairment charge. The impairment charge reflected in the financial statements in relation to wholesale portfolios is a charge of £ 1,569 m (201 9 : £ 208 m charge ; 201 8 : £ 133 m release ) of the total impairment charge on loans and advances and off balance sheet loan commitments and financial guarantee contracts . Further information on impairment allowances, impairment charges , measurement uncertainty, sensitivity analysis and related credit information is set out within the Credit risk performance section .
Accounting for purchased financial guarantee contracts	The Group may enter into a financial guarantee contract which requires the issuer of such contract to reimburse the Group for a loss it incurs because a specified debtor fails to make payment when due in accordance with the terms of a debt instrument. For these separate financial guarantee contracts, the Group recognises a reimbursement asset aligned with the recognition of the underlying ECLs, if it is considered virtually certain that a reimbursement would be rece ived if the specified debtor fails to make payment when due in accordance with the terms of the debt instrument.
Accounting for income taxes	Accounting for income taxes The Group applies IAS 12 Income Taxes in accounting for taxes on income. Income tax payable on taxable profits (current tax) is recognised as an expense in the periods in which the profits arise. Withholding taxes are also treated as income taxes. Income tax recoverable on tax allowable losses is recognised as a current tax asset only to the extent that it is regarded as recoverable by offsetting against taxable profits arising in the current or prior periods. Current tax is measured using tax rates and tax laws that have been enacted or substantively enacted at the balance sheet date. Deferred tax assets are recognised to the extent that it is probable that taxable profit will be available against which the deductible temporary differences, and the carry forward of unused tax credits and unused tax losses can be utilised, except in certain circumstances where the deferred tax asset relating to the deductible temporary difference arises from the initial recog nition of an asset or liability in a transaction that is not a business combination and, at the time of the transaction, affects neither the accounting profit nor taxable profit or loss. Deferred tax is determined using tax rates and legislation enacted or substantively enacted by the balance sheet date which are expected to apply when the deferred tax asset is realised or the deferred tax liability is settled. Deferred tax assets and liabilities are only offset when there is both a legal right to set-off a nd an intention to settle on a net basis. The Group considers an uncertain tax position to exist when it considers that ultimately, in the future, the amount of profit subject to tax may be greater than the amount initially reflected in the Group ’s tax returns. The Group accounts for provisions in respect of uncertain tax positions in two different ways. A current tax provision is recognised when it is considered probable that the outcome of a review by a tax authority of an uncertain ta x position will alter the amount of cash tax due to, or from, a tax authority in the future. From recognition, the current tax provision is then measured at the amount the Group ultimately expects to pay the tax authority to resolve the position. Effe ctive from 1 January 2019, the Group changed its accounting policy on the accrual of interest and penalty amounts in respect of uncertain income tax positions and now recognises such amounts as an expense within profit before tax and will continue to do so in future periods. The prior periods’ tax charges have not been restated because the accrual for interest and penalties in those periods in respect of uncertain tax positions was not material. Deferred tax provisions are adjustments made to the ca rrying value of deferred tax assets in respect of uncertain tax positions. A deferred tax provision is recognised when it is considered probable that the outcome of a review by a tax authority of an uncertain tax position will result in a reduction in the carrying value of the deferred tax asset. From recognition of a provision, measurement of the underlying deferred tax asset is adjusted to take into account the expected impact of resolving the uncertain tax position on the loss or temporary difference giv ing rise to the deferred tax asset. The approach taken to measurement takes account of whether the uncertain tax position is a discrete position that will be reviewed by the tax authority in isolation from any other position, or one of a number of issues which are expected to be reviewed together concurrently and resolved simultaneously with a tax authority. The Group ’ s measurement of provisions is based upon its best estimate of the additional profit that will become subject to tax. For a discrete position, consideration is given only to the merits of that position. Where a number of issues are expected to be reviewed a nd resolved together, the Group will take into account not only the merits of its position in respect of each particular issue but also the overall level of provision relative to the aggregate of the uncertain tax positions across all the issues that are expected to be resolved at the same time. In addition, in assessing provision levels, it is assumed that tax authorities will review uncertain tax positions and that all facts will be fully and transparently disclosed. Critical accounting estimates a nd judgements There are two key areas of judgement that impact the reported tax position. Firstly, the level of provisioning for uncertain tax positions; and secondly, the recognition and measurement of deferred tax assets. The Group does not consid er there to be a significant risk of a material adjustment to the carrying amount of current and deferred tax balances, including provisions for uncertain tax positions in the next financial year. The provisions for uncertain tax positions cover a diverse range of issues and reflect advice from external counsel where relevant. It should be noted that only a proportion of the total uncertain tax positions will be under audit at any point in time, and could therefore be subject to challenge by a tax authori ty over the next year. Deferred tax assets have been recognised based on business profit forecasts. Details on the recog nition of deferred tax assets are provided in this note.
Accounting for trading portfolio assets and liabilities	Accounting for trading portfolio assets and liabilities In accordance with IFRS 9, all assets and liabilities held for trading purposes are held at fair value with gains and losses in the changes in fair value taken to the income statement in net trading income (Note 5 ).
Accounting for derivatives	Accounting for derivatives Derivative instruments are contracts whose value is derived from one or more underlying financial instruments or indices defined in the contract. They include swaps, forward-rate agreements, futures, options and combinations of these instruments and primarily affect the Group ’s net interest income, net trading income and derivative assets and liabilities. Notional amounts of the contracts are not recorded on the balance sheet . Derivatives are used to hedge interest rate, credit risk, inflation risk, exchange rate, commodity equity exposures , and exposures to certain indices such as house price indices and retail price indices related to non-trading positions. All derivati ve instruments are held at fair value through profit or loss, except for derivatives that are in a designated cash flow or net investment hedge accounting relationship. Derivatives are classified as assets when their fair value is positive or as liabilitie s when their fair value is negative. This includes terms included in a contract or financial liability (the host), which, had it been a standalone contract, would have met the definition of a derivative. If these are separated from the host, i.e. when the economic characteristics of the embedded derivative are not closely related with those of the host contract and the combined instrument is not measured at fair value through profit or loss, then they are accounted for in the same way as derivatives. For fi nancial assets, the requirements are whether the financial asset s contain contractual terms that give rise on specified dates to cash flows that are SPPI, and consequently the requirements for accounting for embedded derivatives are not applicable to finan cial assets. Hedge accounting The Group applies the requirements of IAS 39 Financial Instruments: Recognition and Measurement for hedge accounting purposes. The Group applies hedge accounting to represent the economic effects of its interest ra te, currency and contractually linked inflation risk management strategies. Where derivatives are held for risk management purposes, and when transactions meet the required criteria for documentation and hedge effectiveness, the Group applies fair value hedge accounting, cash flow hedge accounting, or hedging of a net investment in a foreign operation, as appropriate to the risks being hedged. The Group has applied the ‘Amendments to IFRS 9, IAS 39 and IFRS 7 Interest Rate Benchmark Reform’ i ssued in September 2019. In accordance with the transition provisions, the amendments have been adopted retrospectively to hedging relationships that existed at the start of the reporting period or were designated thereafter, and to the amount accumulated in the cash flow hedge reserve at that date. The amendments provide temporary relief from applying specific hedge accounting requirements to hedging relationships directly affected by IBOR (‘Interbank Offered Rates’) reform. The reliefs have the effect th at IBOR reform should not generally cause hedge accounting to terminate. However, any hedge ineffectiveness continues to be recorded in the income statement. Furthermore, the amendments set out triggers for when the reliefs will end, which include the unce rtainty arising from interest rate benchmark reform no longer being present. In summary, the reliefs provided by the amendments that apply to the Group are:  When considering the ‘highly probable’ requirement, the Group has assumed that the IBOR interest rates upon which our hedged items are based do not change as a result of IBOR Reform.  In assessing whether the hedge is expected to be highly effective on a forward-looking basis the Group has assumed that the IBOR interest rates upon which t he cash flows of the hedged items and the interest rate swaps that hedge them are based are not altered by IBOR reform.  The Group will not discontinue hedge accounting during the period of IBOR-related uncertainty solely because the retrospective effe ctiveness falls outside the required 80–125% range.  The Group has not recycled the cash flow hedge reserve relating to the period after the reforms are expected to take effect.  The Group has assessed whether the hedged IBOR risk component is a se parately identifiable risk only when it first designates a hedged item in a fair value hedge and not on an ongoing basis. The Group has elected to early adopt the ‘Amendments to IFRS 9, IAS 39, IFRS 7, IFRS 4 and IFRS 16 Interest Rate Benchmark Reform – Phase 2’ issued in August 2020. The Phase 2 amendments provide relief when changes are made to hedge relationships as a result of the interest rate benchmark reform. The Phase 2 amendments adopted by the Group are:  Under a temporary exception, the Group has considered that changes to the hedge designation and hedge documentation due to the interest rate benchmark reform woul d not constitute the discontinuation of the hedge relationship nor the designation of a new hedging relationship.  In respect of the retrospective hedge effectiveness assessment, the Group may elect, on a hedge-by-hedge basis, to reset the cumulative fa ir value changes to zero when the exception to the retrospective assessment ends (Phase 1 relief). Any hedge ineffectiveness will continue to be measured and recognised in full in profit or loss.  The Group has deemed the amounts accumulated in the cas h flow hedge reserve to be based on the alternative benchmark rate (on which the hedge future cash flows are determined) when there is a change in basis for determining the contractual cash flows.  For hedges of groups of items (such as those forming part o f a macro cash flow hedging strategy), the amendments provide relief for items within a designated group of items that are amended for changes directly required by the reform.  In respect of whether a risk component of a hedged item is separately identifiab le, the amendments provide temporary relief to entities to meet this requirement when an alternative risk free rate (RFR) financial instrument is designated as a risk component. These amendments allow the Group upon designation of the hedge to assume that the separately identifiable requirement is met if the Group reasonably expects the RFR risk will become separately identifiable within the next 24 months. The Group applies this relief to each RFR on a rate-by-rate basis and starts when the Group first designates the RFR as a non-contractually specified risk component. Fair value hedge accounting Changes in fair value of derivatives that qualify and are designated as fair value hedges are recorded in the income statement, together with changes in the fair value of the hedged asset or liability that are attributable to the hedged risk. The fair value changes adjust the carrying value of the hedged asset or liability held at amortised cost. If hedge relationships no longer meet the crite ria for hedge accounting, hedge accounting is discontinued. For fair value hedges of interest rate risk, the fair value adjustment to the hedged item is amortised to the income statement over the period to maturity of the previously designated hedge relati onship using the effective interest method. If the hedged item is sold or repaid, the unamortised fair value adjustment is recognised immediately in the income statement. For items classified as fair value through other comprehensive income, the hedge acco unting adjustment is included in other comprehensive income. Cash flow hedge accounting For qualifying cash flow hedges, the fair value gain or loss associated with the effective portion of the cash flow hedge is recognised initially in other comprehensi ve income, and then recycled to the income statement in the periods when the hedged item will affect profit or loss. Any ineffective portion of the gain or loss on the hedging instrument is recognised in the income statement immediately. When a hedging in strument expires or is sold, or when a hedge no longer meets the criteria for hedge accounting, any cumulative gain or loss existing in equity at that time remains in equity and is recognised when the hedged item is ultimately recognised in the income stat ement. When a forecast transaction is no longer expected to occur, the cumulative gain or loss that was recognised in equity is immediately transferred to the income statement. Hedges of net investments The Group ’s net investments in foreign opera tions, including monetary items accounted for as part of the net investment, are hedged for foreign currency risks using both derivatives and foreign currency borrowings. Hedges of net investments are accounted for similarly to cash flow hedges; the effect ive portion of the gain or loss on the hedging instrument is being recognised directly in other comprehensive income and the ineffective portion being recognised immediately in the income statement. The cumulative gain or loss recognised in other comprehen sive income is recognised in the income statement on the disposal or partial disposal of the foreign operation, or other reductions in the Group ’s investment in the operation.
IAS 32 Financial Instruments	In accordance with IAS 32 Financial Instruments: Presentation , the Group reports financial assets and financial liabilities on a net basis on the balance sheet only if there is a legally enforceable right to set-off the recognised amounts and there is intention to settle on a net basis, or to realise the asset and settle the l iability simultaneously. The following table shows the impact of netting arrangements on:  all financial assets and liabilities that are reported net on the balance sheet  all derivative financial instruments and reverse repurchase and repurchase agreements and other similar secured lending and borrowing agreements that are subject to enforceable master netting arrangements or similar agreements, but do not qualify for balance sheet netting. The ‘Net amounts’ presented are not intended to rep resent the Group ’s actual exposure to credit risk, as a variety of credit mitigation strategies are employed in addition to netting and collateral arrangements.
Accounting for financial assets and liabilities - fair values	Accounting for financial assets and liabilities – fair values Financial instruments that are held for trading are recognised at fair value through profit or loss. In addition, financial assets are held at fair value through profit or loss if they do not contain contractual terms that give rise on specified dates to cash flows that are SP PI, or if the financial asset is not held in a business model that is either (i) a business model to collect the contractual cash flows or (ii) a business model that is achieved by both collecting contractual cash flows and selling. Subsequent changes in f air value for these instruments are recognised in the income statement in net investment income, except if reporting it in trading income reduces an accounting mismatch. All financial instruments are initially recognised at fair value on the date of ini tial recognition (including transaction costs, other than financial instruments held at fair va lue through profit or loss) and depending on the subsequent classification of the financial asset or liability, may continue to be held at fair value either thro ugh profit or loss or other comprehensive income. The fair value of a financial instrument is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Wherever possible, fair value is determined by reference to a quoted market price for that instrument. For many of the Group ’s financial assets and liabilities, especially derivatives, quoted prices are not available and valuation models are used to e stimate fair value. The models calculate the expected cash flows under the terms of each specific contract and then discount these values back to a present value. These models use as their basis independently sourced market inputs including, for example, i nterest rate yield curves, equities and commodities prices, option volatilities and currency rates. For financial liabilities measured at fair value, the carrying amount reflects the effect on fair value of changes in own credit spreads derived from obser vable market data such as in primary issuance and redemption activity for structured notes. On initial recognition, it is presumed that the transaction price is the fair value unless there is observable information available in an active market to the co ntrary. The best evidence of an instrument’s fair value on initial recognition is typically the transaction price. However, if fair value can be evidenced by comparison with other observable current market transactions in the same instrument, or is based o n a valuation technique whose inputs include only data from observable markets, then the instrument should be recognised at the fair value derived from such observable market data. For valuations that have made use of unobservable inputs, the difference b etween the model valuation and the initial transaction price (Day One profit) is recognised in profit or loss either: on a straight-line basis over the term of the transaction; or over the period until all model inputs will become observable where appropri ate; or released in full when previously unobservable inputs become observable. Various factors influence the availability of observable inputs and these may vary from product to product and change over time. Factors include the depth of activity in the r elevant market, the type of product, whether the product is new and not widely traded in the marketplace, the maturity of market modelling and the nature of the transaction (bespoke or generic). To the extent that valuation is based on models or inputs tha t are not observable in the market, the determination of fair value can be more subjective, dependent on the significance of the unobservable input to the overall valuation. Unobservable inputs are determined based on the best information available, for ex ample by reference to similar assets, similar maturities or other analytical techniques. The sensitivity of valuations used in the financial statements to possible changes in significant unobservable inputs is shown on page 323 . Critical accounting esti mates and judgements The valuation of financial instruments often involves a significant degree of judgement and complexity, in particular where valuation models make use of unobservable inputs (‘Level 3’ assets and liabilities). This note provides information on these instruments, including the related unrealised gains and losses recognised in the period, a description of significant valuation techniques and unobservable inputs, and a sensitivity analysis.
Accounting for property, plant and equipment	Accounting for property, plant and equipment The Group applies IAS 16 Property Plant and Equipment and IAS 40 Investment Properties . Property, plant and equipment is stated at cost, which includes direct and incremental acquisition costs less accumulated depreciation and provisions for impairment, if required. Subsequent costs are capitalised if these result in enhancement of the asset. Depreciation is provided on the depreciable amount of items of property, plant and equipment on a straight-line basis over their estimated useful economic lives. Depreciation rates, methods and the residual values underlying the calculation of depreciation of items of property, plant and equipment are kept under review to take account of any change in circumstances. The Group uses the following annual rates in calculating depreciation: Costs of adaptation and installed equipment are depreciated over the shorter of the life of the lease or the depreciation rates noted in the table above. Investment property The Group initially recognises investment property at cost, and subsequently at fair value at each balance sheet date, reflecting market conditions at the reporting date. Gains and losses on remeasurement are included in the income statement. Annual rates in calculating depreciation Depreciation rate Freehold land Freehold buildings and long-leasehold property (more than 50 years to run) Leasehold property over the remaining life of the lease (less than 50 years to run) Costs of adaptation of freehold and leasehold property Equipment installed in freehold and leasehold property Computers and similar equipment Fixtures and fittings and other equipment Not depreciated 2 - 3.3 % Over the remaining life of the l ease 6 - 10 % 6 - 10 % 17 - 33 % 9 - 20 %
Accounting for leases	Accounting for leases under IFRS 16 effective from 1 January 2019 IFRS 16 applies to all leases with the exception of licenses of intellectual property, rights held by licensing agree ment within the scope of IAS 38 Intangible Assets , service concession arrangements, leases of biological a ssets within the scope of IAS 41 Agriculture and leases of minerals, oil, natural gas and similar non-regenerative resources. IFRS 16 includes an accounting policy choice for a lessee to elect not to apply IFRS 16 to remaining assets within the scope of IAS 38 Intangible Assets which the Group has decided to apply. When the Group is the lessee, it is required to recognise both:  A lease liability, measured at the present value of remaining c ash flows on the lease, and  A right of use (ROU) asset, measured at the amount of the initial measurement of the lease liability, plus any lease payments made prior to commencement date, initial direct costs, and estimated costs of restoring the underlyin g asset to the condition required by the lease, less any lease incentives received. Subsequently the lease liability will increase for the accrual of interest, resulting in a constant rate of return throughout the life of the lease, and reduce when paymen ts are made. The right of use asset will amortise to the income statement over the life of the lease. The lease liability is remeasured when there is a change in one of the following:  Future lease payments arising from a change in an index or rate;  The Group ’s estimate of the amount expected to be payable under a residual value guarantee; or  The Group ’s assessment of whether it will exercise a purchase, extension or termination option. When the lease liability is remeasured , a corresponding adjus tment is made to the carrying amount of the ROU asset, or is recorded in the income statement if the carrying amount of the RO U asset has been reduced to nil. On the balance sheet, the ROU assets are included within property, plant and equipment and the lease liabilities are included within other liabilities . The Group applies the recognition exemption in IFRS 16 for leases with a term not exceeding 12 mo nths. For these leases the lease payments are recognised as an expense on a straight l ine basis over the lease term unless another systematic basis is more appropriate. When the Group is the lessor, the lease must be classified as either a finance lease or an operating lease. A finance lease is a lease which confers substantially all the risks and rewards of the leased assets on the lessee. An operating lease is a lease where substanti ally all of the risks and rewards of the leased asset remain with the lessor. When the lease is deemed a finance lease, the leased asset is not held on the balance sheet; instead a finance lease receivable is recognised representing the minimum lease pa yments receivable under the terms of the lease, discounted at the rate of interest implicit in the lease. When the lease is deemed an operating lease, the lease income is recognised on a straight-line basis over the period of the lease unless another syst ematic basis is more appropriate. The Group holds the leased assets on-balance sheet within property, plant and equipment. Accounting for finance leases under IAS 17 for 2018 Under IAS 17, a finance lease is a lease which confers substantially all t he risks and rewards of the leased assets on the lessee. Where the Group is the lessor, the leased asset is not held on the balance sheet; instead a finance lease receivable is recognised representing the minimum lease payments receivable under the te rms of the lease, discounted at the rate of interest implicit in the lease. Where the Group is the lessee, the leased asset is recognised in property, plant and equipment and a finance lease liability is recognised, representing the minimum lease paym ents payable under the lease, discounted at the rate of interest implicit in the lease. Interest income or expense is recognised in interest receivable or payable, allocated to accounting periods to reflect a constant periodic rate of return . Accounting for operating leases under IAS 17 for 2018 An operating lease under IAS 17 is a lease where substantially all of the risks and rewards of the leased assets remain with the lessor. Where the Group is the lessor, lease income is recognised on a straight-line basis over the period of the lease unless another systematic basis is more appropriate. The Group holds the leased assets on-balance sheet within property, plant and equipment. Where the Group is the lessee, rentals payable are rec ognised as an expense in the income statement on a straight-line basis over the lease term unless another systematic basis is more appropriate.
Accounting for goodwill and other intangible assets	Accounting for goodwill and intangible assets Goodwill The carrying value of goodwill is determined in accordance with IFRS 3 Business Combinations and IAS 36 Impairment of Assets. Goodwill arising on the acquisition of subsidiaries represents the excess of the fair value of the purchase consideration over the fair value of the Group ’s share of the assets acquired and the liabilities and contingent liabilities assumed on the date of the acquisition. G oodwill is reviewed annually for impairment, or more frequently when there are indications that impairment may have occurred. The test involves comparing the carrying value of a cash generating unit (CGU) including goodwill with the present value of the pr e-tax cash flows, discounted at a rate of interest that reflects the inherent risks, of the CGU to which the goodwill relates, or the CGU’s fair value if this is higher. Intangible assets Intangible assets other than goodwill are accounted for in accordan ce with IAS 38 Intangible Assets . Intangible assets are initially recognised when they are separable or arise from contractual or other legal rights, the cost can be measured reliably and, in the case of intangible assets not acquired in a business combination, where it is probable that future economic benefits attributable to the assets will flow from their use. For internally generated intangible assets, only costs incurred dur ing the development phase are capitalised. Expenditures in the resea rch phase are expensed when it is incurred . Intangible assets are stated at cost (which is, in the case of assets acquired in a business combination, the acquisition date fair value) less accumulated amortisation and impairment, if any, and are amortised over their useful lives in a manner that reflects the pattern to which they contribute to future cash flows, generally using the amortisation periods set out below: Annual rates in calculating amortisation Amortisation period Goodwill Not amortised Internally generated software a 12 months to 6 years Other software 12 months to 6 years Customer lists 12 months to 25 years Licences and other 12 months to 25 years Intangible assets are reviewed for impairment when there are indications that impairment may have occurred . Intangible assets not yet available for use are reviewed annually for impairment. Note a Exceptions to the above rate relate to useful lives of certain core banking platforms that are assessed individually and, if appropriate, amortised over longer periods ranging from 10 to 15 years .
Accounting for provisions	Accounting for provisions The Group applies IAS 37 Provisions, Contingent Liabilities and Contingent Assets in accounting for non-financial liabilities. Provisions are recognised for present obligations arising as consequences of past events where it is more likely than not that a transfer of economic benefit will be necessary to settle the obligation, which can be reliably estimated. Provision is made for the anticipated cost of restructuring, including redundancy costs , when an obligation exists; for example, when the Group has a detailed formal plan for restructuring a business and has raised valid expectations in those affected by the restructuring by announcing its main features or starting to implement the plan. Critical accounting estimates and judgements The financial reporting of provisions involves a significant degree of judgement and is complex. Identifying whether a present obligation exists and estimating the probability, timing, nature and quantum of the outflows that may arise from past events requires judgements to be made based on the specific facts and circumstances relating to individual events and often requires specialist professional advice. When matters are at an early stage, accounting jud gements and estimates can be difficult because of the high degree of uncertainty involved. Management continues to monitor matters as they develop to re-evaluate on an ongoing basis whether provisions should be recognised, however there can remain a wide r ange of possible outcomes and uncertainties, particularly in relation to legal, competition and regulatory matters, and as a result it is often not practicable to make meaningful estimates even when matters are at a more advanced stage. The complexity of such matters often requires the input of specialist professional advice in making assessments to produce estimates. Customer redress and legal, competition and regulatory matters are areas where a higher degree of professional judgement is required. The a mount that is recognised as a provision can also be very sensitive to the assumptions made in calculating it. This gives rise to a large range of potential outcomes which require judgement in determining an appropriate provision level. See below for inform ation on payment protection redress and Note 26 for more detail of legal, competition and regulatory matters.
Accounting for contingent liabilities	Accounting for contingent liabilities Contingent liabilities are possible obligations whose existence will be confirmed only by uncertain future events, and present obligations where the transfer of economic resources is uncertain or cannot be reliably measured. Contingent liabilities are not recognised on the balance sheet but are disclosed unless the likelihood of an outflow of economic resources is remote.
Accounting for subordinated liabilities	Accounting for subordinated liabilities Subordinated liabilities are measured at amortised cost using the effective interest method under IFRS 9.
Accounting for staff costs, pensions and post retirement benefits	Accounting for staff costs The Group applies IAS 19 Employee benefits in its accounting for most of the components of staff costs. Short-term employee benefits – salaries, accrued performance costs and social security are recognised over the period in which the employees provide the services to which the payments relate. Performance costs – recognised to the extent that the Group has a present obligation t o its employees that can be measured reliably and are recognised over the period of service that employees are required to work to qualify for the payments. Deferred cash and share awards are made to employees to incentivise performance over the period em ployees provide services. To receive payment under an award, employees must provide service over the vesting period. The period over which the expense for deferred cash and share awards is recognised is based upon the period employees consider their servic es contribute to the awards. For past awards, the Group considers that it is appropriate to recognise the awards over the period from the date of grant to the date that the awards vest. In relation to awards granted from 2017, the Group , taking i nto account the changing employee understanding surrounding those awards, considered it appropriate for expense to be recognised over the vesting period including the financial year prior to the grant date. The accounting policies for share-based paymen ts, and pensions and other post-retirement benefits are included in Note 32 and Note 33 respectively. Accounting for pensions and post-retirement benefits The Group operates a number of pension schemes and post-employment benefit schemes. Defined contribution schemes – the Group recognises contributions due in respect of the accounting period in the income statement. Any contributions unpaid at the balance sheet date are included as a liability. Defined benefit schemes – the Group recognises its obligations to members of ea ch scheme at the period end, less the fair value of the scheme assets after applying the asset ceiling test. Each scheme’s obligations are calculated using the projected unit credit method. Scheme assets are stated at fair value as at the period end. Ch anges in pension scheme liabilities or assets (remeasurements) that do not arise from regular pension cost, net interest on net defined benefit liabilities or assets, past service costs, settlements or contributions to the scheme, are recognised in other c omprehensive income. Remeasurements comprise experience adjustments (differences between previous actuarial assumptions and what has actually occurred), the effects of changes in actuarial assumptions, return on scheme assets (excluding amounts included in the interest on the assets) and any changes in the effect of the asset ceiling restriction (excluding amounts included in the interest on the restriction). Post-employment benefit schemes – the cost of providing healthcare benefits to retired employees i s accrued as a liability in the financial statements over the period that the employees provide services to the Group , using a methodology similar to that for defined benefit pension schemes.
Accounting for share-based payments	Accounting for share-based payments The Group applies IFRS 2 Share-based Payments in accounting for employee remuneration in the form of shares. Employee incentives include awards in the form of shares and share options, as well as offering employees the opportunity to purchase shares on favourable terms. The cost of the employee services received in respect of the shares or share options granted is recognised in the income statement over the period that employees provide services . The overall cost of the award is calculated using the number of shares and options expected to vest and the fair value of the shares or options at the date of grant. The number of shares and options expected to vest takes into account the likelihood that performance and service conditions included in the terms of the awards will be met. Failure to meet the non-vesting condition is treated as a cancellation, resulting in an acceleration of recognition of the cost of the employee services . The fair value of shares is the market price ruling on the grant date, in some cases adjusted to reflect restrictions on transferability. The fair value of options granted is determined using option pricing models to estimate the numbers of shares likel y to vest. These take into account the exercise price of the option, the current share price, the risk-free interest rate, the expected volatility of the share price over the life of the option and other relevant factors. Market conditions that must be met in order for the award to vest are also reflected in the fair value of the award, as are any other non-vesting conditions – such as continuing to make payments into a share-based savings scheme.
Accounting for investment in subsidiaries	The Group applies IFRS 10 Consolidated Financial Statements . The consolidated financial statements combine the financial statements of the Group and all its subsidiaries. Subsidiaries are entities over which the Group has control. Under IFRS 10, this is when the Group is exposed or has rights to variable returns from its involvement in the entity and has the ability to affect those returns through its power over the entity. The Group reassesses whether it controls an entity if facts and circumstances indicate that there have been changes to its power, its rights to variable returns or its ability to use its power to affect the amount of its returns. Intra-group transactions and balances are eliminated on consolidation and consistent accounting policies are used throughout the Group for the purposes of the consolidation. Changes in ownership interests in subsidiaries are accounted for as equity transactions if they occur after control has been obtai ned and they do not result in loss of control. The significant judgements used in applying this policy are set out below. Accounting for investment in subsidiaries In the individual financial statements of Barclays PLC , investments in subsidiaries are sta ted at cost less impairment.
Accounting for associates and joint ventures	Accounting for associates and joint ventures The Group applies IAS 28 Investments in Associates and IFRS 11 Joint Arrangements . Associates are entities in which the Group has significant influence, but not control, over the operating and financial policies. Generally the Group holds more than 20 %, but less than 50 %, of their voting shares. Joint ventures are arrangements where the Group has joint control and rights to the net assets of the entity. The Group ’s investments in associates and joint ventures are initially recorded at cost and increased (or decreased) each year by the Group ’s share of the post acquisition profit /( loss). The Group ceases to r ecognise its share of the losses of equity accounted associates when its share of the net assets and amounts due from the entity have been written off in full, unless it has a contractual or constructive obligation to make good its share of the losses. In some cases, investments in these entities may be held at fair value through profit or loss, for example, those held by private equity businesses.
Accounting for assets pledged, collateral received and assets transferred	Assets are pledged or transferred as collateral to secure liabilities under repurchase agreements, securitisations and stock lending agreements or as security deposits relating to derivatives. Assets transferred are non-cash assets transferred to a third party that do not qualify for derecognition from the Group balance sheet, for example because Barclays retains substantially all the exposure to those assets under an agreement to repurchase them in the future for a fixed price. Assets pledged or transfer red as collateral include all assets categorised as encumbered in the disclosure on pages 222 to 223 of the Barclays PLC Pillar 3 Report 2020 (unaudited) , other than those held in commercial paper conduits. In these transactions, the Group will be requir ed to step in to provide financing itself under a liquidity facility if the vehicle cannot access the commercial paper market . Where non-cash assets are pledged or transferred as collateral for cash received, the asset continues to be recognised in full, and a related liability is also recognised on the balance sheet. Where non-cash assets are pledged or transferred as collateral in an exchange for non-cash assets, the transferred asset continues to be recognised in full, and there is no associated liabili ty as the non-cash collateral received is not recognised on the balance sheet. The Group is unable to use, sell or pledge the transferred assets for the duration of the transaction and remains exposed to interest rate risk and credit risk on these pledged assets. Unless stated, the counterparty's recourse is not limited to the transferred assets.
Accounting for securitisations	Accounting for securitisations The Group uses securitisations as a source of finance and a means of risk transfer. Such transactions generally result in the transfer of contractual cash flows from portfolios of financial assets to holders of issued debt securities. Securitisations may, dependin g on the individual arrangement, result in continued recognition of the securitised assets and the recognition of the debt securities issued in the transaction; lead to partial continued recognition of the assets to the extent of the Group ’s continuin g involvement in those assets or lead to derecognition of the assets and the separate recognition, as assets or liabilities, of any rights and obligations created or retained in the transfer. Full derecognition only occurs when the Group transfers both its contractual right to receive cash flows from the financial assets, or retains the contractual rights to receive the cash flows, but assumes a contractual obligation to pay the cash flows to another party without material delay or reinvestment, and also tr ansfers substantially all the risks and rewards of ownership, including credit risk, prepayment risk and interest rate risk.
Disclosure of detailed information about financial instruments [line items]
Accounting for financial instruments	(iii) Financial assets and liabilities The Group applies IFRS 9 Financial Instruments to the recognition, classification and measurement, and derecognition of financial assets and financial liabilities an d the impairment of financial assets. T he Group applies the requirements of IAS 39 Financial Instruments: Recognition and Measurement for hedge accounting purposes. Recognition The Group recognises financial assets and liabilities when it becom es a party to the terms of the contract. Trade date or settlement date accounting is applied depending on the classification of the financial asset. Classification and measurement Financial assets are classified on the basis of two criteria: i) the business model within which financial assets are managed, and ii) their contractual cash flow characteristics (whether the cash flows represent ‘solely payments of principal and interest’ (SPPI)). The Group assesses the business model criteri a at a portfolio level. Information that is considered in determining the applicable business model includes (i) policies and objectives for the relevant portfolio, (ii) how the performance and risks of the portfolio are managed, evaluated and reported to management, and (iii) the frequency, volume and timing of sales in prior periods, sales expectation for future periods, and the reasons for such sales. The contractual cash flow characteristics of financial assets are assessed with reference to whether th e cash flows represent SPPI. In assessing whether contractual cash flows are SPPI compliant, interest is defined as consideration primarily for the time value of money and the credit risk of the principal outstanding. The time value of money is defined as the element of interest that provides consideration only for the passage of time and not consideration for other risks or costs associated with holding the financial asset. Terms that could change the contractual cash flows so that it would not meet the co ndition for SPPI are considered, including: (i) contingent and leverage features, (ii) non-recourse arrangements and (iii) features that could modify the time value of money. Financial assets are measured at amortised cost if they are held within a busine ss model whose objective is to hold financial assets in order to collect contractual cash flows, and their contractual cash flows represent SPPI. Financial assets are measured at fair value through other comprehensive income if they are held within a busi ness model whose objective is achieved by both collecting contractual cash flows and selling financial assets, and their contractual cash flows represent SPPI. Other financial assets are measured at fair value through profit and loss. There is an option t o make an irrevocable election on initial recognition for non traded equity investments to be measured at fair value through other comprehensive income, in which case dividends are recognised in profit or loss, but gains or losses are not reclassified to p rofit or loss upon derecognition, and the impairment requirements of IFRS 9 do not apply. The accounting policy for each type of financial asset or liability is included within the relevant note for the item. The Group ’s policies for determining the fair values of the assets and liabilities are set out in Note 17 . Derecognition The Group derecognises a financial asset, or a portion of a financial asset, from its balance sheet where the contractual rights to cash flows from the asset have expired, or have been transferred, usually by sale, and with them either substantially all the risks and rewards of the asset or significant risks and rewards, along with the unconditional ability to sell or pledge the asset. Financial liabilities ar e de-recognised when the liability has been settled, has expired or has been extinguished. An exchange of an existing financial liability for a new liability with the same lender on substantially different terms – generally a difference of 10% or more in t he present value of the cash flows or a substantive qualitative amendment – is accounted for as an extinguishment of the original financial liability and the recognition of a new financial liability. Transactions in which the Group transfers assets a nd liabilities, portions of them, or financial risks associated with them can be complex and it may not be obvious whether substantially all of the risks and rewards have been transferred. It is often necessary to perform a quantitative analysis. Such an a nalysis compares the Group ’s exposure to variability in asset cash flows before the transfer with its retained exposure after the transfer. A cash flo w analysis of this nature may require judgement. In particular, it is necessary to estimate the asset’s expected future cash flows as well as potential variability around this expectation. The method of estimating expected future cash flows depends on the nature of the asset, with market and market-implied data used to the greatest extent possible. The potential variability around this expectation is typically determined by stressing underlying parameters to create reasonable alternative upside and downside scenarios. Probabilities are then assigned to each scenario. Stressed parameters may include default rates, loss severity, or prepayment rates
Deposits at amortised cost [member]
Disclosure of detailed information about financial instruments [line items]
Accounting for financial liabilities	Accounting for loans and advances and deposits held at amortised cost Loans and advances to customers and banks, customer accounts, debt securities and most financial liabilities, are held at amortised cost. That is, the initial fair value (which is normally the amount advanced or borrowed) is adjusted for repayments and the amortisation of coupon, fees and expenses to represent the effective interest rate of the asset or liability. Balance s deferred on-balance sheet as effective interest rate adjustments are amortised to interest income over the life of the financial instrument to which they relate. Financial assets that are held in a business model to collect the contractual cash flows an d that contain contractual terms that give rise on specified dates to cash flows that are SPPI, are measured at amortised cost. The carrying value of these financial assets at initial recognition includes any directly attributable transaction costs. Refer to Note 1 for details on ‘solely payments of principal and interest’ . In determining whether the business model is a ‘hold to collect’ model, the objective of the business model must be to hold the financial asset to collect contractual cash flows rather than holding the financial asset for trading or short-term profit taking purposes. While the objective of the business model must be to hold the financial asset to collect contractual cash flows this does not mean the Group is required to hold the financial assets until maturity. When determining if the business model objective is to collect contractual cash flows the Group will consider past sales and expectations about future sales.
Financial liabilities designated at fair value [member]
Disclosure of detailed information about financial instruments [line items]
Accounting for financial liabilities	Accounting for liabilities designated at fair value through profit and loss In accordance with IFRS 9, financial liabilities may be designated at fair value, with gains and losses taken to the income statement within net trading income (Note 5 ) and net investment income (Note 6 ). Movements in own credit are reported thro ugh other comprehensive income, unless the effects of changes in the liability's credit risk would crea t e or enlarge an accounting mismatch in P&L. In these scenarios, all gains and losses on that liability (including the effects of changes in the credit risk of the liability) are presented in P&L. On derecognition of the financial liability no amount relat ing to own credit risk are recycled to the income statement. The Group has the ability to make the fair value designation when holding the instruments at fair value reduces an accounting mismatch (caused by an offsetting liability or asset being held at fair value), or is managed by the Group on the basis of its fair value, or includes terms that have substantive derivative characteristics (Note 14 ). The details on how the fair value amounts are arrived at for financial liabilities desi gnated at fair value are described in Note 17 .
Financial assets designated at fair value [member]
Disclosure of detailed information about financial instruments [line items]
Accounting for financial insruments at fair value through profit and loss	Accounting for financial assets designated at fair value Financial assets, other than those held for trading, are classified in this category if they are so irrevocably designated at inception and the use of the designation removes or significantly reduces an accounting mismatch. Subsequent changes in fair value for these instruments are recognised in the income statement in n et investment income, except if reporting it in trading income reduces an accounting mismatch. The details on how the fair value amounts are derived for financial assets at fair value are described in Note 17 .
Financial assets mandatorily at fair value [member]
Disclosure of detailed information about financial instruments [line items]
Accounting for financial insruments at fair value through profit and loss	Accounting for financial assets mandatorily at fair value Financial assets that are held for trading are recognised at fair value through profit or loss. In addition, financial assets are held at fair value through profit or loss if they do not contain contractual terms that give rise on specified dates to cash flows that are SPPI, or if the financial asset is not held in a business model that is either (i) a business model to co llect the contractual cash flows or (ii) a business model that is achieved by both collecting contractual cash flows and selling.
Financial assets at fair value through other comprehensive income [member]
Disclosure of detailed information about financial instruments [line items]
Accounting for financial assets	Accounting for financial assets at fair value through oth er comprehensive income (FVOCI ) Financial assets that are debt instruments held in a business model that is achieved by both collecting contractual cash flows and selling and that contain contractual terms that give rise on specified dates to cash flows that are SPPI are measured at FVOCI. They are subsequently re - measured at fair value and changes therein (except for t hose relating to impairment, interest income and foreign currency exchange gains and losses) are recognised in other comprehensive income until the assets are sold. Interest (calculated using the effective interest method) is recognised in the income state ment in net interest income (Note 3 ). Upon disposal, the cumulative gain or loss recognised in other comprehensive income is in cluded in net investment income (N ote 6). In determining whether the business model is achieved by both collecting contractua l cash flows and selling financial assets, it is determined that both collecting contractual cash flows and selling financial assets are integral to achieving the objective of the business model. T he Group will consider past sales and expectations abo ut future sales to establish if the business model is achieved . For equity securities that are not held for trading, the Group may make an irrevocable election on initial recognition to present subsequent changes in the fair value of the instrument i n other comprehensive income (except for dividend income which is recognised in profit or loss). Gains or losses on the de - recognition of these equity securities are not transferred to profit or loss. These assets are also not subject to the impairment req uirements and therefore no amounts are recycled to the income statement. Where the Group has not made the irrevocable election to present subsequent changes in the fair value of the instrument in other comprehensive income, equity securities are measu red at fair value through profit or loss.
Financial assets at amortised cost [member]
Disclosure of detailed information about financial instruments [line items]
Accounting for loans and advances	Accounting for loans and advances and deposits held at amortised cost Loans and advances to customers and banks, customer accounts, debt securities and most financial liabilities, are held at amortised cost. That is, the initial fair value (which is normally the amount advanced or borrowed) is adjusted for repayments and the amortisation of coupon, fees and expenses to represent the effective interest rate of the asset or liability. Balance s deferred on-balance sheet as effective interest rate adjustments are amortised to interest income over the life of the financial instrument to which they relate. Financial assets that are held in a business model to collect the contractual cash flows an d that contain contractual terms that give rise on specified dates to cash flows that are SPPI, are measured at amortised cost. The carrying value of these financial assets at initial recognition includes any directly attributable transaction costs. Refer to Note 1 for details on ‘solely payments of principal and interest’ . In determining whether the business model is a ‘hold to collect’ model, the objective of the business model must be to hold the financial asset to collect contractual cash flows rather than holding the financial asset for trading or short-term profit taking purposes. While the objective of the business model must be to hold the financial asset to collect contractual cash flows this does not mean the Group is required to hold the financial assets until maturity. When determining if the business model objective is to collect contractual cash flows the Group will consider past sales and expectations about future sales.

Segmental reporting (Tables)

Segmental reporting (Tables)	12 Months Ended
	Dec. 31, 2020
2. Segmental reporting
Analysis of results by business	Analysis of results by business Barclays UK Barclays International Head Office Group results £m £m £m £m For the year ended 31 December 2020 Total income 6,347 15,921 (502) 21,766 Credit impairment charges (1,467) (3,280) (91) (4,838) Net operating income/(expenses) 4,880 12,641 (593) 16,928 Operating costs (4,270) (8,765) (399) (13,434) UK bank levy (50) (240) (9) (299) Litigation and conduct (32) (48) (73) (153) Total operating expenses (4,352) (9,053) (481) (13,886) Other net income/(expenses) a 18 28 (23) 23 Profit/(loss) before tax 546 3,616 (1,097) 3,065 Total assets (£bn) 289.1 1,041.8 18.6 1,349.5 Number of employees (full time equivalent) 21,300 10,800 50,900 83,000 Average number of employees (full time equivalent) 81,800 Note a 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. Barclays UK Barclays International Head Office Group results £m £m £m £m For the year ended 31 December 2019 Total income 7,353 14,675 (396) 21,632 Credit impairment charges (712) (1,173) (27) (1,912) Net operating income/(expenses) 6,641 13,502 (423) 19,720 Operating costs (3,996) (9,163) (200) (13,359) UK bank levy (41) (174) (11) (226) Litigation and conduct (1,582) (116) (151) (1,849) Total operating expenses (5,619) (9,453) (362) (15,434) Other net income a - 69 2 71 Profit/(loss) before tax 1,022 4,118 (783) 4,357 Total assets (£bn) 257.8 861.4 21.0 1,140.2 Number of employees (full time equivalent) 21,400 11,200 48,200 80,800 Average number of employees (full time equivalent) 82,700 Note a 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. Analysis of results by business Barclays UK Barclays International Head Office Group results £m £m £m £m For the year ended 31 December 2018 Total income 7,383 14,026 (273) 21,136 Credit impairment (charges)/releases (826) (658) 16 (1,468) Net operating income/(expenses) 6,557 13,368 (257) 19,668 Operating costs (4,075) (9,324) (228) (13,627) UK bank levy (46) (210) (13) (269) GMP charge - - (140) (140) Litigation and conduct (483) (127) (1,597) (2,207) Total operating expenses (4,604) (9,661) (1,978) (16,243) Other net income/(expenses) a 3 68 (2) 69 Profit/(loss) before tax 1,956 3,775 (2,237) 3,494 Total assets (£bn) 249.7 862.1 21.5 1,133.3 Number of employees (full time equivalent) 22,600 12,400 48,500 83,500 Note a 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.
Income by geographic region	Income by geographic region a 2020 2019 2018 For the year ended 31 December £m £m £m United Kingdom 11,211 11,809 11,529 Europe 2,059 1,754 1,617 Americas 7,425 7,064 7,058 Africa and Middle East 36 59 43 Asia 1,035 946 889 Total 21,766 21,632 21,136 Income from individual countries which represent more than 5% of total income a 2020 2019 2018 For the year ended 31 December £m £m £m United Kingdom 11,211 11,809 11,529 United States 7,318 6,939 6,911 Note a The geographical analysis is based on the location of the office wh ere the transactions are record ed .

Net interest income (Table)

Net interest income (Table)	12 Months Ended
	Dec. 31, 2020
Consolidated and separate financial statements [line items]
Net interest income	2020 2019 a 2018 a £m £m £m Cash and balances at central banks 275 1,091 1,123 Loans and advances at amortised cost 10,180 12,450 12,073 Fair value through other comprehensive income 776 1,032 1,029 Negative interest on liabilities 68 13 35 Other 593 870 281 Interest and similar income 11,892 15,456 14,541 Deposits at amortised cost (1,030) (2,449) (2,250) Debt securities in issue b (1,360) (1,906) (1,677) Subordinated liabilities (670) (1,068) (1,223) Negative interest on assets (344) (278) (270) Other (366) (348) (59) Interest and similar expense (3,770) (6,049) (5,479) Net interest income 8,122 9,407 9,062 Note s a Comparatives for negative interest income on liabilities and negative interest expense on assets have been re - presented from Other interest income and Other interest expense. b Barclays has amended the presentation of the premium paid for purchased financial guarantees which are embedded in notes it issues directly to the market. From 20 20 onwards, the full note coupon (£ 99 m) is presented as interest expense within net interest income. The financial guarantee element of the coupon had previ ously been recognised in net investment income (2019: £ 25 m; 2018: £ 1 m). The comparatives have not been restated.

Net trading income (Table)

Net trading income (Table)	12 Months Ended
	Dec. 31, 2020
5. Net trading income
Net trading income	2020 2019 2018 £m £m £m Net gains from financial instruments held for trading 5,342 2,941 3,292 Net gains from financial instruments designated at fair value 700 256 267 Net gains from financial instruments mandatorily at fair value 987 1,038 1,007 Net trading income 7,029 4,235 4,566

Net fee and commission income (

Net fee and commission income (Table)	12 Months Ended
	Dec. 31, 2020
4. Net Fee and commission income
Total fees in scope of IFRS 15 Revenues from Contracts with Customers	Fee and commission income is disaggregated below by fee types that reflect the nature of the services offered across the Group and operating segments , in accordance with IFRS 15. The below table includes a total for fees in scope of IFRS 15. Refer to Note 2 for more detailed information about operating segments. 2020 Barclays UK Barclays International Head Office Total £m £m £m £m Fee type Transactional 810 2,353 - 3,163 Advisory 159 693 2 854 Brokerage and execution 212 1,173 - 1,385 Underwriting and syndication - 2,867 - 2,867 Other 71 173 9 253 Total revenue from contracts with customers 1,252 7,259 11 8,522 Other non-contract fee income - 119 - 119 Fee and commission income 1,252 7,378 11 8,641 Fee and commission expense (308) (1,754) (8) (2,070) Net fee and commission income 944 5,624 3 6,571 2019 Barclays UK Barclays International Head Office Total £m £m £m £m Fee type Transactional 1,074 2,809 - 3,883 Advisory 177 903 - 1,080 Brokerage and execution 208 1,131 - 1,339 Underwriting and syndication - 2,358 - 2,358 Other 92 242 12 346 Total revenue from contracts with customers 1,551 7,443 12 9,006 Other non-contract fee income - 116 - 116 Fee and commission income 1,551 7,559 12 9,122 Fee and commission expense (365) (1,990) (7) (2,362) Net fee and commission income 1,186 5,569 5 6,760 2018 Barclays UK Barclays International Head Office Total £m £m £m £m Fee type Transactional 1,102 2,614 - 3,716 Advisory 209 850 - 1,059 Brokerage and execution 153 1,073 - 1,226 Underwriting and syndication - 2,462 - 2,462 Other 78 207 27 312 Total revenue from contracts with customers 1,542 7,206 27 8,775 Other non-contract fee income - 118 - 118 Fee and commission income 1,542 7,324 27 8,893 Fee and commission expense (360) (1,707) (17) (2,084) Net fee and commission income 1,182 5,617 10 6,809

Net investment income (Table)

Net investment income (Table)	12 Months Ended
	Dec. 31, 2020
6. Net investment income
Net investment income	2020 2019 2018 £m £m £m Net (losses)/gains from financial instruments mandatorily at fair value (50) 510 226 Net gains from disposal of debt instruments at fair value through other comprehensive income 295 502 158 Net (losses)/gains from disposal of financial assets and liabilities measured at amortised cost a (61) 257 38 Dividend income 37 76 91 Net (losses)/gains on other investments b (208) (214) 72 Net investment income 13 1,131 585 Notes a Included within the 2020 balance are losses of £ 115 m relating to the partial redemption of contingent capital notes. Included within the 2019 balance are gains of £ 170 m relating to the sale of debt securities as part of the Group’s Treasury operations. b Barclays has amended the presentation of the premium paid for purchased financial guarantees which are embedded in notes it issues directly to the market. From 2020 onwards, the full note coupon is presented as interest expense within net interest income. The financial guarantee element of the coupon had previously been recognised in net investment incom e. The reclassification into interest expense is £ 99 m for 2020 (2019: £ 25 m, 2018: £ 1 m) . The comparatives have not been restated.

Credit impairment charges (Tabl

Credit impairment charges (Tables)	12 Months Ended
	Dec. 31, 2020
7. Credit impairment charges
Credit impairment charges and other provisions	2020 2019 2018 Impairment charges Recoveries and reimburse-ments a Total Impairment charges Recoveries and reimburse-ments a Total Impairment charges Recoveries and reimburse-ments a Total £m £m £m £m £m £m £m £m £m Loans and advances 4,308 (399) 3,909 1,957 (124) 1,833 1,785 (195) 1,590 Provision for undrawn contractually committed facilities and guarantees provided 776 - 776 71 - 71 (125) - (125) Loans impairment 5,084 (399) 4,685 2,028 (124) 1,904 1,660 (195) 1,465 Cash collateral and settlement balances 2 - 2 1 - 1 (1) - (1) Financial assets at fair value through other comprehensive income 2 - 2 1 - 1 4 - 4 Other financial assets measured at cost 149 - 149 6 - 6 - - - Credit impairment charges 5,237 (399) 4,838 2,036 (124) 1,912 1,663 (195) 1,468 Note a Recoveries and reimbursements includes £ 364 m for reimbursements expected to be received under the arrangement where Group has entered into financial guarantee contracts which provide credit protection over certain loans assets with third parties. Cash recoveries of previously written off amounts to £ 35 m .

Operating expenses (Table)

Operating expenses (Table)	12 Months Ended
	Dec. 31, 2020
8. Operating expenses
Operating expenses	2020 2019 2018 £m £m £m Infrastructure costs Property and equipment 1,556 1,409 1,360 Depreciation and amortisation a 1,539 1,487 1,252 Lease payments a 34 41 329 Impairment of property, equipment and intangible assets 194 33 9 Total infrastructure costs 3,323 2,970 2,950 Administration and general expenses Consultancy, legal and professional fees 567 590 729 Marketing and advertising 330 425 495 UK bank levy 299 226 269 Other administration and general expenses 1,117 1,059 964 Total administration and general expenses 2,313 2,300 2,457 Staff costs 8,097 8,315 8,629 Provisions for litigation and conduct 153 1,849 2,207 Operating expenses 13,886 15,434 16,243 Note a Following the adoption of IFRS 16 from 1 January 2019, the depreciation charge associated with right of use assets is reported within the depreciation and amortisation charge for 2019 and 2020 .

Tax (Tables)

Tax (Tables)	12 Months Ended
	Dec. 31, 2020
9. Tax
Tax charge	2020 2019 2018 £m £m £m Current tax charge/(credit) Current year 1,255 1,037 689 Adjustments in respect of prior years 31 (45) (214) 1,286 992 475 Deferred tax charge/(credit) Current year (830) 86 442 Adjustments in respect of prior years 148 (75) (6) (682) 11 436 Tax charge 604 1,003 911
Reconciliation between the actual tax charge and the corporate tax rate	The table below shows the reconciliation between the actual tax charge and the tax charge that would result from applying the standard UK corpo ration tax rate to the Group’s profit before tax. 2020 2020 2019 2019 2018 2018 £m % £m % £m % Profit before tax 3,065 4,357 3,494 Tax charge based on the standard UK corporation tax rate of 19% (2019: 19%; 2018: 19%) 582 19.0% 828 19.0% 664 19.0% Impact of profits/losses earned in territories with different statutory rates to the UK (weighted average tax rate is 25.1% (2019: 24.2%; 2018: 21.9%)) 188 6.1% 227 5.2% 100 2.9% Recurring items: Adjustments in respect of prior years 179 5.8% (120) (2.7%) (220) (6.3%) Non-creditable taxes including withholding taxes 109 3.5% 150 3.4% 156 4.5% Impact of UK bank levy being non-deductible 57 1.9% 43 1.0% 51 1.5% Non-deductible expenses 48 1.6% 45 1.0% 81 2.3% Tax adjustments in respect of share-based payments 26 0.8% (6) (0.1%) 17 0.5% Impact of Barclays Bank PLC's overseas branches being taxed both locally and in the UK 25 0.8% 15 0.3% 16 0.5% Banking surcharge and other items 6 0.2% 57 1.3% 104 2.9% Changes in recognition of deferred tax and effect of unrecognised tax losses (123) (4.0%) (82) (1.9%) (104) (3.0%) AT1 tax credit (165) (5.4%) (157) (3.6%) (148) (4.3%) Non-taxable gains and income (208) (6.8%) (260) (6.0%) (245) (7.0%) Non-recurring items: Remeasurement of UK deferred tax assets due to cancellation of rate change (118) (3.8%) - - - - Non-deductible provisions for UK customer redress (7) (0.2%) 263 6.1% 93 2.7% Non-deductible provisions for investigations and litigation 5 0.2% - - 346 9.9% Total tax charge 604 19.7% 1,003 23.0% 911 26.1%
Deferred tax assets and liabilities	The deferred tax amounts on the balance sheet were as follows: 2020 2019 £m £m US Intermediate Holding Company Tax Group ('IHC Tax Group') 1,001 1,037 US Branch Tax Group 1,048 1,015 UK Tax Group 886 818 Other (outside the UK and US tax groups) 509 420 Deferred tax asset 3,444 3,290 Deferred tax liability (15) (23) Net deferred tax 3,429 3,267
Movements on deferred tax assets and liabilities during the year before offsetting	The table below shows movements on deferred tax assets and liabilities during the year. The amounts are different from those disclosed on the balance sheet and in the preceding table as th ey are presented before offsetting asset and liability balances where there is a legal right to set-off and an intention to settle on a net basis. Fixed asset timing differences Fair value through other comprehensive income Cash flow hedges Retirement benefit obligations Loan impairment allowance Other provisions Share-based payments and deferred compensation Other temporary differences Tax losses carried forward Total £m £m £m £m £m £m £m £m £m £m Assets 1,338 119 - 38 501 128 344 1,458 523 4,449 Liabilities (31) (18) (181) (640) - - - (312) - (1,182) At 1 January 2020 1,307 101 (181) (602) 501 128 344 1,146 523 3,267 Income statement 129 - - 6 156 22 20 134 215 682 Other comprehensive income and reserves - (137) (377) (191) - - 5 238 - (462) Other movements (12) (2) (8) 4 9 (7) (6) (33) (3) (58) 1,424 (38) (566) (783) 666 143 363 1,485 735 3,429 Assets 1,465 - - 43 666 143 363 1,564 735 4,979 Liabilities (41) (38) (566) (826) - - - (79) - (1,550) At 31 December 2020 1,424 (38) (566) (783) 666 143 363 1,485 735 3,429 Assets 1,292 180 39 46 601 112 359 1,377 529 4,535 Liabilities (16) (35) (10) (435) - - - (262) - (758) At 1 January 2019 1,276 145 29 (389) 601 112 359 1,115 529 3,777 Income statement 51 - - (4) (49) 23 (19) (31) 18 (11) Other comprehensive income and reserves - (42) (210) (205) (40) 2 9 72 - (414) Other movements (20) (2) - (4) (11) (9) (5) (10) (24) (85) 1,307 101 (181) (602) 501 128 344 1,146 523 3,267 Assets 1,338 119 - 38 501 128 344 1,458 523 4,449 Liabilities (31) (18) (181) (640) - - - (312) - (1,182) At 31 December 2019 1,307 101 (181) (602) 501 128 344 1,146 523 3,267

Earnings per share (Tables)

Earnings per share (Tables)	12 Months Ended
	Dec. 31, 2020
10. Earnings per share
Earnings per share	2020 2019 2018 £m £m £m Profit attributable to ordinary equity holders of the parent 1,526 2,461 1,597 2020 2019 2018 million million million Basic weighted average number of shares in issue 17,300 17,200 17,075 Number of potential ordinary shares 368 282 308 Diluted weighted average number of shares 17,668 17,482 17,383 Basic earnings per share Diluted earnings per share 2020 2019 2018 2020 2019 2018 p p p p p p Earnings per ordinary share 8.8 14.3 9.4 8.6 14.1 9.2

Trading portfolio (Table)

Trading portfolio (Table)	12 Months Ended
	Dec. 31, 2020
12. Trading Portfolio
Trading portfolio assets	Trading portfolio assets Trading portfolio liabilities 2020 2019 2020 2019 £m £m £m £m Debt securities and other eligible bills 56,482 52,739 (30,102) (23,741) Equity securities 62,192 56,000 (17,303) (13,175) Traded loans 8,348 5,378 - - Commodities 928 78 - - Trading portfolio assets/(liabilities) 127,950 114,195 (47,405) (36,916)

Financial assets at fair valu_3

Financial assets at fair value through the income statement (Tables)	12 Months Ended
	Dec. 31, 2020
Disclosure of financial assets [line items]
Financial assets designated at fair value	Designated at fair value Mandatorily at fair value Total 2020 2019 2020 2019 2020 2019 £m £m £m £m £m £m Loans and advances 5,600 4,900 25,279 17,792 30,879 22,692 Debt securities 292 3,995 1,401 1,254 1,693 5,249 Equity securities - - 4,620 7,495 4,620 7,495 Reverse repurchase agreements and other similar secured lending 19 40 137,597 96,847 137,616 96,887 Other financial assets - - 343 763 343 763 Financial assets at fair value through the income statement 5,911 8,935 169,240 124,151 175,151 133,086
Credit risk of loans and advances designated at fair value and related credit derivatives	Maximum exposure as at 31 December Changes in fair value during the year ended Cumulative changes in fair value from inception 2020 2019 2020 2019 2020 2019 £m £m £m £m £m £m Loans and advances designated at fair value, attributable to credit risk 5,600 4,900 (47) 4 (73) (26) Value mitigated by related credit derivatives 795 - 3 - 3 -
Financial assets at fair value through the income statement [member]
Disclosure of financial assets [line items]
Financial assets designated at fair value	Designated at fair value Mandatorily at fair value Total 2020 2019 2020 2019 2020 2019 £m £m £m £m £m £m Loans and advances 5,600 4,900 25,279 17,792 30,879 22,692 Debt securities 292 3,995 1,401 1,254 1,693 5,249 Equity securities - - 4,620 7,495 4,620 7,495 Reverse repurchase agreements and other similar secured lending 19 40 137,597 96,847 137,616 96,887 Other financial assets - - 343 763 343 763 Financial assets at fair value through the income statement 5,911 8,935 169,240 124,151 175,151 133,086
Credit risk of loans and advances designated at fair value and related credit derivatives	C redit risk of financial assets designated at fair value and related credit derivatives The following table shows the maximum exposure to credit risk, the changes in fair value attributable to changes in credit risk, and the cumulative changes in fair value since ini tial recognition for loans and advances . The table does not include debt securities and reverse repurchase agreements and other similar secured lending designated at FV as they have minimal exposure to credit risk . Reverse repurchase agreements are collateralised and debt securities are primarily relating to high quality sovereigns Maximum exposure as at 31 December Changes in fair value during the year ended Cumulative changes in fair value from inception 2020 2019 2020 2019 2020 2019 £m £m £m £m £m £m Loans and advances designated at fair value, attributable to credit risk 5,600 4,900 (47) 4 (73) (26) Value mitigated by related credit derivatives 795 - 3 - 3 -

Derivative financial instrume_2

Derivative financial instruments (Tables)	12 Months Ended
	Dec. 31, 2020
14. Derivative financial instruments
Total derivatives	Total derivatives 2020 2019 Notional contract amount Fair value Notional contract amount Fair value Assets Liabilities Assets Liabilities £m £m £m £m £m £m Total derivative assets/(liabilities) held for trading 43,169,971 301,880 (299,795) 42,111,110 229,063 (228,617) Total derivative assets/(liabilities) held for risk management 189,784 566 (980) 181,375 173 (587) Derivative assets/(liabilities) 43,359,755 302,446 (300,775) 42,292,485 229,236 (229,204)
Derivatives held for trading and risk management	The fair values and notional amounts of derivative instruments held for trading and held for risk management are set out in the following table: Derivatives held for trading and held for risk management 2020 2019 Notional contract amount Fair value Notional contract amount Fair value Assets Liabilities Assets Liabilities £m £m £m £m £m £m Derivatives held for trading Foreign exchange derivatives OTC derivatives 5,461,057 84,401 (84,043) 4,906,647 56,480 (56,845) Derivatives cleared by central counterparty 78,946 335 (335) 74,698 84 (145) Exchange traded derivatives 14,034 3 (3) 18,520 12 (31) Foreign exchange derivatives 5,554,037 84,739 (84,381) 4,999,865 56,576 (57,021) Interest rate derivatives OTC derivatives 13,547,990 170,808 (161,157) 12,627,808 140,207 (133,401) Derivatives cleared by central counterparty 18,737,415 965 (885) 17,428,460 867 (1,093) Exchange traded derivatives 2,971,966 371 (360) 5,041,948 1,251 (1,265) Interest rate derivatives 35,257,371 172,144 (162,402) 35,098,216 142,325 (135,759) Credit derivatives OTC derivatives 384,900 3,674 (3,909) 399,386 5,253 (5,399) Derivatives cleared by central counterparty 462,945 931 (1,095) 426,130 2,962 (2,687) Credit derivatives 847,845 4,605 (5,004) 825,516 8,215 (8,086) Equity and stock index derivatives OTC derivatives 466,151 18,807 (26,094) 232,050 10,628 (15,785) Exchange traded derivatives 927,114 20,165 (20,521) 841,994 10,178 (10,849) Equity and stock index derivatives 1,393,265 38,972 (46,615) 1,074,044 20,806 (26,634) Commodity derivatives OTC derivatives 4,244 89 (110) 7,327 303 (256) Exchange traded derivatives 113,209 1,331 (1,283) 106,142 838 (861) Commodity derivatives 117,453 1,420 (1,393) 113,469 1,141 (1,117) Derivative assets/(liabilities) held for trading 43,169,971 301,880 (299,795) 42,111,110 229,063 (228,617) Total OTC derivatives 19,864,342 277,779 (275,313) 18,173,218 212,871 (211,686) Total derivatives cleared by central counterparty 19,279,306 2,231 (2,315) 17,929,288 3,913 (3,925) Total exchange traded derivatives 4,026,323 21,870 (22,167) 6,008,604 12,279 (13,006) Derivative assets/(liabilities) held for trading 43,169,971 301,880 (299,795) 42,111,110 229,063 (228,617) Derivatives held for risk management Derivatives designated as cash flow hedges OTC foreign exchange derivatives 6,596 351 - - - - OTC interest rate derivatives 2,433 35 - 1,195 7 (1) Interest rate derivatives cleared by central counterparty 65,408 - - 66,578 - - Derivatives designated as cash flow hedges 74,437 386 - 67,773 7 (1) Derivatives designated as fair value hedges OTC interest rate derivatives 11,116 155 (980) 8,379 136 (586) Interest rate derivatives cleared by central counterparty 103,440 - - 104,078 - - Derivatives designated as fair value hedges 114,556 155 (980) 112,457 136 (586) Derivatives designated as hedges of net investments OTC foreign exchange derivatives 791 25 - 1,145 30 - Derivatives designated as hedges of net investments 791 25 - 1,145 30 - Derivative assets/(liabilities) held for risk management 189,784 566 (980) 181,375 173 (587) Total OTC derivatives 20,936 566 (980) 10,719 173 (587) Total derivatives cleared by central counterparty 168,848 - - 170,656 - - Derivative assets/(liabilities) held for risk management 189,784 566 (980) 181,375 173 (587)
Significant hedge accounting exposures impacted by the IBOR reform	The following table summarises the significant hedge accounting exposures impacted by the IBOR reform (see Note 41 for further updates) as at 31 December 20 20 : Nominal amount of hedged items directly impacted by IBOR reform Nominal amount of hedging instruments directly impacted by IBOR reform Current benchmark rate Expected convergence to RFR £m £m GBP London Interbank Offered rate (LIBOR) Reformed Sterling Overnight Index Average (SONIA) 15,740 14,276 USD LIBOR Secured Overnight Financing Rate (SOFR) 29,154 28,832 Euro Overnight Index Average (EONIA) Euro Short-Term Rate (€STR) 5,128 5,128 JPY LIBOR Tokyo Overnight Average (TONA) 1,262 1,262 CHF LIBOR Swiss Average Rate Overnight (SARON) 145 145 All Other IBORs Various Other RFRs 111 111 Total 51,540 49,754
Hedged items in fair value hedge accounting relationships and Hedged items in cash flow hedge accounting and hedges of net investments in foreign operations	Hedged items in fair value hedges Accumulated fair value adjustment included in carrying amount Hedged item statement of financial position classification and risk category Carrying amount Total Of which: Accumulated fair value adjustment on items no longer in a hedge relationship Change in fair value used as a basis to determine ineffectiveness Hedge ineffectiveness recognised in the income statement a £m £m £m £m £m 2020 Assets Loans and advances at amortised cost - Interest rate risk 9,858 2,289 (638) 1,583 111 - Inflation risk 545 345 - 25 3 Debt securities classified at amortised cost - Interest rate risk 1,440 23 - 18 (7) - Inflation risk 4,071 (43) - 453 3 Financial assets at fair value through other comprehensive income - Interest rate risk 41,544 1,284 351 825 (13) - Inflation risk 10,821 367 (9) 307 1 Total assets 68,279 4,265 (296) 3,211 98 Liabilities Debt securities in issue - Interest rate risk (50,438) (2,859) (24) (1,466) (56) Total liabilities (50,438) (2,859) (24) (1,466) (56) Total hedged items 17,841 1,406 (320) 1,745 42 2019 Assets Loans and advances at amortised cost - Interest rate risk 8,442 694 (643) 1,030 76 - Inflation risk 525 325 - (2) 1 Debt securities classified at amortised cost - Interest rate risk 2,974 (1) - (1) - - Inflation risk 2,258 (41) - (41) 1 Financial assets at fair value through other comprehensive income - Interest rate risk 32,169 922 494 2,046 (4) - Inflation risk 7,811 87 - 111 (16) Total assets 54,179 1,986 (149) 3,143 58 Liabilities Debt securities in issue - Interest rate risk (55,589) (1,574) (75) (1,445) (13) Total liabilities (55,589) (1,574) (75) (1,445) (13) Total hedged items (1,410) 412 (224) 1,698 45 Note a Hedge ineffectiveness is recognised in net interest income . Hedged items in cash flow hedges and hedges of net investments in foreign operations Description of hedge relationship and hedged risk Change in value of hedged item used as the basis for recognising ineffectiveness Balance in cash flow hedging reserve for continuing hedges Balance in currency translation reserve for continuing hedges Balances remaining in cash flow hedging reserve for which hedge accounting is no longer applied Balances remaining in currency translation reserve for which hedge accounting is no longer applied Hedging gains or losses recognised in other comprehensive income Hedge ineffectiveness recognised in the income statement a £m £m £m £m £m £m £m 2020 Cash flow hedge of: Interest rate risk Loans and advances at amortised cost (1,124) (598) - (1,370) - (1,124) 27 Foreign exchange risk Loans and advances at amortised cost (70) (15) - - - (70) - Debt securities classified at amortised cost (278) (65) - - - (278) - Inflation risk Debt securities classified at amortised cost (41) (65) - - - (41) 1 Total cash flow hedge (1,513) (743) - (1,370) - (1,513) 28 Hedge of net investment in foreign operations USD foreign operations (240) - 857 - - (240) - EUR foreign operations (17) - (2) - - (17) - Other foreign operations (9) - 47 - 186 (9) - Total foreign operations (266) - 902 - 186 (266) - 2019 Cash flow hedge of: Interest rate risk Loans and advances at amortised cost (696) (223) - (1,072) - (706) 43 Inflation risk Debt securities classified at amortised cost (29) (26) - - - (25) 2 Total cash flow hedge (725) (249) - (1,072) - (731) 45 Hedge of net investment in foreign operations USD foreign operations 215 - 1,087 - - 215 - EUR foreign operations 70 - (1) - 16 70 - Other foreign operations 3 - 1 - 240 3 - Total foreign operations 288 - 1,087 - 256 288 - Note a Hedge ineffectiveness is recognised in net interest income.
Hedging instruments which are carried on the Group's balance sheet	Carrying value Nominal amount Change in fair value used as a basis to determine ineffectiveness Nominal amount directly impacted by IBOR reform Derivative assets Derivative liabilities Loan liabilities Hedge type Risk category £m £m £m £m £m £m As at 31 December 2020 Fair value Interest rate risk 120 (166) - 103,623 (925) 30,072 Inflation risk 35 (815) - 10,933 (778) 1,487 Total 155 (980) - 114,556 (1,703) 31,559 As at 31 December 2019 Fair value Interest rate risk 110 (44) - 104,568 (1,571) 55,552 Inflation risk 26 (542) - 7,889 (82) 6,101 Total 136 (586) - 112,457 (1,653) 61,653 Carrying value Nominal amount Change in fair value used as a basis to determine ineffectiveness Nominal amount directly impacted by IBOR reform Derivative assets Derivative liabilities Loan liabilities Hedge type Risk category £m £m £m £m £m £m As at 31 December 2020 Cash flow Interest rate risk 33 - - 65,042 1,151 18,195 Foreign exchange risk 351 - - 6,596 348 - Inflation risk 2 - - 2,799 42 - Total 386 - - 74,437 1,541 18,195 Net investment Foreign exchange risk 25 - (8,660) 9,451 265 - As at 31 December 2019 Cash flow Interest rate risk 3 (1) - 66,515 739 15,223 Inflation risk 4 - - 1,258 31 - Total 7 (1) - 67,773 770 15,223 Net investment Foreign exchange risk 30 - (10,051) 11,196 288 -
The expected notional values of current hedging instruments in future years	The following table profiles the expected notional values of current hedging instruments in future years: 2020 2021 2022 2023 2024 2025 2026 and later As at 31 December £m £m £m £m £m £m £m Fair value hedges of: Interest rate risk (outstanding notional amount) 103,623 94,402 81,916 72,281 58,001 47,244 40,243 Inflation risk (outstanding notional amount) 10,933 10,128 8,817 7,966 6,051 5,062 4,348
Effect on the income statement and OCI of recycling amounts in respect of Cash flow hedges and Net investment hedges of foreign operations	The effect on the income statement and other comprehensive income of recycling amounts in respect of cash flow hedges and net investment hedges of foreign operat ions is set out in the following table: 2020 2019 Amount recycled from other comprehensive income due to hedged item affecting income statement Amount recycled from other comprehensive income due to sale of investment, or cash flows no longer expected to occur Amount recycled from other comprehensive income due to hedged item affecting income statement Amount recycled from other comprehensive income due to sale of investment, or cash flows no longer expected to occur Description of hedge relationship and hedged risk £m £m £m £m Cash flow hedge of interest rate risk Recycled to net interest income 489 17 259 18 Cash flow hedge of foreign exchange risk Recycled to net interest income 268 - - - Hedge of net investment in foreign operations Recycled to other income - (4) - 15

Financial assets at fair valu_4

Financial assets at fair value through other comprehensive income (Table)	12 Months Ended
	Dec. 31, 2020
Disclosure of financial assets [line items]
Financial assets at fair value through other comprehensive income	2020 2019 £m £m Debt securities and other eligible bills 77,736 64,103 Equity securities 761 1,023 Loans and advances 191 624 Financial assets at fair value through other comprehensive income 78,688 65,750
Financial assets at fair value through other comprehensive income [member]
Disclosure of financial assets [line items]
Financial assets at fair value through other comprehensive income	2020 2019 £m £m Debt securities and other eligible bills 77,736 64,103 Equity securities 761 1,023 Loans and advances 191 624 Financial assets at fair value through other comprehensive income 78,688 65,750

Financial liabilities designa_2

Financial liabilities designated at fair value (Table)	12 Months Ended
	Dec. 31, 2020
Disclosure of financial liabilities [line items]
Financial liabilities designated at fair value	Designated at fair value Mandatorily at fair value Total 2020 2019 2020 2019 2020 2019 £m £m £m £m £m £m Loans and advances 5,600 4,900 25,279 17,792 30,879 22,692 Debt securities 292 3,995 1,401 1,254 1,693 5,249 Equity securities - - 4,620 7,495 4,620 7,495 Reverse repurchase agreements and other similar secured lending 19 40 137,597 96,847 137,616 96,887 Other financial assets - - 343 763 343 763 Financial assets at fair value through the income statement 5,911 8,935 169,240 124,151 175,151 133,086
Financial liabilities designated at fair value [member]
Disclosure of financial liabilities [line items]
Financial liabilities designated at fair value	2020 2019 Fair value Contractual amount due on maturity Fair value Contractual amount due on maturity £m £m £m £m Debt securities 50,437 57,650 49,559 56,891 Deposits 21,706 22,107 25,526 25,725 Repurchase agreements and other similar secured borrowing 177,371 177,389 128,547 128,706 Other financial liabilities 251 251 694 694 Financial liabilities designated at fair value 249,765 257,397 204,326 212,016

Fair value of financial instr_2

Fair value of financial instruments (Tables)	12 Months Ended
	Dec. 31, 2020
17. Fair value of financial instruments
Assets and liabilities held at fair value, disaggregated by valuation technique and 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: Assets and liabilities held at fair value 2020 2019 Valuation technique using Valuation technique using Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total As at 31 December £m £m £m £m £m £m £m £m Trading portfolio assets 60,671 65,416 1,863 127,950 60,352 51,579 2,264 114,195 Financial assets at fair value through the income statement 4,503 162,142 8,506 175,151 10,445 114,141 8,500 133,086 Derivative financial assets 9,155 288,822 4,469 302,446 5,439 220,642 3,155 229,236 Financial assets at fair value through other comprehensive income 19,792 58,743 153 78,688 18,755 46,566 429 65,750 Investment property - - 10 10 - - 13 13 Total assets 94,121 575,123 15,001 684,245 94,991 432,928 14,361 542,280 Trading portfolio liabilities (24,391) (22,986) (28) (47,405) (20,977) (15,939) - (36,916) Financial liabilities designated at fair value (159) (249,251) (355) (249,765) (82) (203,882) (362) (204,326) Derivative financial liabilities (8,762) (285,774) (6,239) (300,775) (5,305) (219,910) (3,989) (229,204) Total liabilities (33,312) (558,011) (6,622) (597,945) (26,364) (439,731) (4,351) (470,446)
Analysis of movements in Level 3 assets	The following table summarises the movements in the Level 3 balances 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 y ear. Analysis of movements in Level 3 assets and liabilities As at 1 January 2020 Total gains and losses in the period recognised in the income statement Total gains or losses recognised in OCI Transfers As at 31 December 2020 Purchases Sales Issues Settlements Trading income Other income In Out £m £m £m £m £m £m £m £m £m £m £m Corporate debt 120 77 (6) - - (35) - - 12 (17) 151 Non-asset backed loans 974 1,955 (2,182) - (12) (10) - - 39 (55) 709 Asset backed securities 656 458 (428) - (40) (25) - - 90 (25) 686 Equity cash products 392 5 (149) - - (41) - - 11 (4) 214 Other 122 - - - - (21) - - 2 - 103 Trading portfolio assets 2,264 2,495 (2,765) - (52) (132) - - 154 (101) 1,863 Non-asset backed loans 5,494 1,102 (283) - (706) 426 - - - (453) 5,580 Equity cash products 835 15 (404) - - (93) (36) - 9 - 326 Private equity investments 900 84 (54) - (3) - (56) - 15 (12) 874 Other 1,271 3,718 (3,606) - (32) 32 (43) - 386 - 1,726 Financial assets at fair value through the income statement 8,500 4,919 (4,347) - (741) 365 (135) - 410 (465) 8,506 Non-asset backed loans 343 - - - (237) - - - - - 106 Asset backed securities 86 - (35) - - - - (4) - - 47 Financial assets at fair value through other comprehensive income 429 - (35) - (237) - - (4) - - 153 Investment property 13 - (2) - - - (1) - - - 10 Trading portfolio liabilities - (27) - - - (1) - - - - (28) Financial liabilities designated at fair value (362) - 3 (21) 1 20 4 - (38) 38 (355) Interest rate derivatives (206) 17 (12) - 85 109 - - (18) 23 (2) Foreign exchange derivatives (7) - - - 21 (16) - - (19) 22 1 Credit derivatives 198 (125) 24 - (371) 24 - - (21) 116 (155) Equity derivatives (819) (699) (43) - 105 (101) - - (13) (44) (1,614) Net derivative financial instruments a (834) (807) (31) - (160) 16 - - (71) 117 (1,770) Total 10,010 6,580 (7,177) (21) (1,189) 268 (132) (4) 455 (411) 8,379 Note a The derivative financial instruments are represented on a net basis. On a gross basis, derivative financial assets are £ 4,469 m ( 2019 : £ 3,155 m) and derivative financial liabilities are £ 6,239 m ( 2019 : £ 3,989 m ) . Analysis of movements in Level 3 assets and liabilities As at 1 January 2019 Purchases Sales Issues Settlements Total gains and losses in the period recognised in the income statement Total gains or losses recognised in OCI Transfers As at 31 December 2019 Trading income Other income In Out £m £m £m £m £m £m £m £m £m £m £m Corporate debt 388 126 (52) - (311) 1 - - 45 (77) 120 Non-asset backed loans 2,263 1,844 (2,799) - (134) 24 - - 200 (424) 974 Asset backed securities 664 202 (166) - - (30) - - 16 (30) 656 Equity cash products 136 62 (40) - - (31) - - 293 (28) 392 Other 162 - - - (1) (24) - - - (15) 122 Trading portfolio assets 3,613 2,234 (3,057) - (446) (60) - - 554 (574) 2,264 Non-asset backed loans 5,688 235 - - (755) 343 (1) - - (16) 5,494 Equity cash products 559 66 - - (2) 3 209 - - - 835 Private equity investments 1,071 45 (121) - (28) - 55 - 41 (163) 900 Other 2,064 5,719 (5,720) - (9) 12 (15) - 24 (804) 1,271 Financial assets at fair value through the income statement 9,382 6,065 (5,841) - (794) 358 248 - 65 (983) 8,500 Non-asset backed loans - 283 - - - - - 60 - - 343 Asset backed securities - 116 (30) - - - - - - - 86 Equity cash products 2 - (1) - - - - (1) - - - Other 353 - - - (135) - - - - (218) - Financial assets at fair value through other comprehensive income 355 399 (31) - (135) - - 59 - (218) 429 Investment property 9 5 - - - - (1) - - - 13 Trading portfolio liabilities (3) - - - - - - - - 3 - Financial liabilities designated at fair value (280) (179) 10 (42) 41 67 (2) - (27) 50 (362) - Interest rate derivatives 22 (9) - - 88 (92) - - (177) (38) (206) Foreign exchange derivatives 7 - - - 25 (12) - - (32) 5 (7) Credit derivatives 1,050 (59) 3 - (866) 76 - - (9) 3 198 Equity derivatives (607) (296) (35) - (2) (296) - - (37) 454 (819) Net derivative financial instruments 472 (364) (32) - (755) (324) - - (255) 424 (834) Total 13,548 8,160 (8,951) (42) (2,089) 41 245 59 337 (1,298) 10,010
Analysis of movements in Level 3 liabilities	The following table shows the Group’s Level 3 assets and liabilities that are held at fair value disaggregated by product type: Level 3 assets and liabilities held at fair value by product type 2020 2019 Assets Liabilities Assets Liabilities £m £m £m £m Interest rate derivatives 1,613 (1,615) 605 (812) Foreign exchange derivatives 144 (143) 291 (298) Credit derivatives 196 (351) 539 (342) Equity derivatives 2,498 (4,112) 1,711 (2,528) Commodity derivatives 18 (18) 9 (9) Corporate debt 698 (3) 521 - Reverse repurchase and repurchase agreements - (174) - (167) Non-asset backed loans 6,394 - 6,811 - Asset backed securities 767 (24) 756 - Equity cash products 542 - 1,228 - Private equity investments 873 (14) 899 (19) Other a 1,258 (168) 991 (176) Total 15,001 (6,622) 14,361 (4,351) Note a Other includes commercial real estate loans, asset backed loans, funds and fund-linked products, issued debt, government sponsored debt and investment property.
Unrealised gains and losses on Level 3 financial assets and liabilities	Unrealised gains and losses on Level 3 financial assets and liabilities The fo llowing table discloses the unrealised gains and losses recognised in the year arising on Level 3 financial assets and liabilities held at year end . Unrealised gains and losses recognised during the period on Level 3 assets and liabilities held at year end 2020 2019 Income statement Other compre- hensive income Income statement Other compre- hensive income Trading income Other income Total Trading income Other income Total As at 31 December £m £m £m £m £m £m £m £m Trading portfolio assets (114) - - (114) (57) - - (57) Financial assets at fair value through the income statement 399 (89) - 310 346 246 - 592 Fair value through other comprehensive income - - (1) (1) - - 60 60 Investment property - (1) - (1) - (1) - (1) Trading portfolio liabilities - - - - - - - - Financial liabilities designated at fair value 20 (1) - 19 64 - - 64 Net derivative financial instruments (91) - - (91) (459) - - (459) Total 214 (91) (1) 122 (106) 245 60 199
Significant unobservable inputs, assets	Significant unobservable inputs The following table discloses the valuation techniques and significant unobservable inputs for assets and liabilities recognised at fair value and classified as Level 3 along with the range of values used for those significant unobservable inputs: Valuation technique(s) c Significant unobservable inputs 2020 Range 2019 Range Min Max Min Max Units a Derivative financial instruments b Interest rate derivatives Discounted cash flows Inflation forwards 1 3 1 3 % Credit spread 17 1,831 41 1,620 bps Comparable pricing Price - 84 - 37 points Option model Inflation volatility 31 227 47 190 bps vol Interest rate volatility 6 489 8 431 bps vol FX - IR correlation (30) 78 (30) 78 % IR - IR correlation (20) 99 (30) 100 % Credit derivatives Discounted cash flows Credit spread 5 480 72 200 bps Comparable pricing Price - 100 - 155 points Equity derivatives Option model Equity volatility 1 110 1 200 % Equity - equity correlation (45) 100 (20) 100 % Discounted cash flow Discounted margin (225) 3,000 (500) 1,100 bps Non-derivative financial instruments Non-asset backed loans Discounted cash flows Loan spread 31 1,518 31 1,884 bps Credit spread 200 300 180 1,223 bps Price - 104 - 133 points Yield 5 8 6 12 % Comparable pricing Price - 137 - 123 points Asset backed securities Comparable pricing Price - 112 - 99 points Private equity investments EBITDA multiple EBITDA multiple 14 16 5 16 Multiple Earnings multiple Earnings multiple 3 28 - 27 Multiple Discounted cash flow Discount margin 1 10 8 10 % Corporate debt Comparable pricing Price - 127 - 100 points Other d Discounted cash flows Credit spread 146 483 126 649 bps Notes a The units used to disclose ranges for significant unobservable inputs are percentages, points and basis points. Points are a percentage of par; for example, 100 points equals 100% of par. A basis point equals 1/100th of 1%; for example, 150 basis points equals 1.5%. b Certain derivative instruments are classified as Level 3 due to a significant unobservable credit spread input into the calculation of the Credit Valuation Adjustment for the instruments. The range of significant unobserva ble credit spreads is between 17 - 1831 bps ( 2019 : 41 - 1,620 bps). c A range has not been provided for Net Asset Value as there would be a wide range reflecting the diverse nature of the positions. d Other includes commercial real estate loans .
Sensitivity analysis of valuations using unobservable inputs, assets	Sensitivity analysis of valuations using unobservable inputs 2020 2019 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 82 - (123) - 44 - (127) - Foreign exchange derivatives 6 - (11) - 5 - (7) - Credit derivatives 55 - (44) - 73 - (47) - Equity derivatives 174 - (179) - 114 - (119) - Commodity derivatives 2 - (2) - - - - - Corporate debt 16 - (14) - 11 - (16) - Non-asset backed loans 190 3 (409) (3) 214 8 (492) (8) Equity cash products 158 - (141) - 123 - (175) - Private equity investments 199 - (227) - 205 - (235) - Other a 21 - (21) - 1 - (1) - Total 903 3 (1,171) (3) 790 8 (1,219) (8) Note a Other include s commercial real estate loans and asset backed loans .
Fair value adjustments	Fair value adjustments Key balance sheet valuation adjustments are quantified below : 2020 2019 £m £m Exit price adjustments derived from market bid-offer spreads (493) (429) Uncollateralised derivative funding (115) (57) Derivative credit valuation adjustments (268) (135) Derivative debit valuation adjustments 113 155
Comparison of carrying amounts and fair values for assets and liabilities not held at fair value	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: 2020 2019 Carrying amount Fair value Level 1 Level 2 Level 3 Carrying amount Fair value Level 1 Level 2 Level 3 As at 31 December £m £m £m £m £m £m £m £m £m £m Financial assets Loans and advances at amortised cost 342,632 340,516 8,824 81,322 250,370 339,115 337,510 11,145 73,378 250,985 Reverse repurchase agreements and other similar secured lending 9,031 9,031 - 9,031 - 3,379 3,379 - 3,379 - Financial liabilities Deposits at amortised cost (481,036) (481,106) (396,124) (82,874) (2,108) (415,787) (415,807) (327,329) (78,659) (9,819) Repurchase agreements and other similar secured borrowing (14,174) (14,174) - (14,174) - (14,517) (14,517) - (14,517) - Debt securities in issue (75,796) (77,813) - (75,957) (1,856) (76,369) (78,512) - (76,142) (2,370) Subordinated liabilities (16,341) (16,918) - (16,918) - (18,156) (18,863) - (18,863) -

Offsetting financial assets a_2

Offsetting financial assets and financial liabilities (Table)	12 Months Ended
	Dec. 31, 2020
18. Offsetting financial assets and financial liabilities
Offsetting of financial assets	Amounts subject to enforceable netting arrangements Amounts not subject to enforceable netting arrangements c Balance sheet total d Effects of offsetting on-balance sheet Related amounts not offset Gross amounts Amounts offset a Net amounts reported on the balance sheet Financial instruments Financial collateral b Net amount £m £m £m £m £m £m £m £m As at 31 December 2020 Derivative financial assets 342,649 (44,305) 298,344 (233,080) (48,064) 17,200 4,102 302,446 Reverse repurchase agreements and other similar secured lending e 448,134 (306,398) 141,736 - (141,352) 384 4,911 146,647 Total assets 790,783 (350,703) 440,080 (233,080) (189,416) 17,584 9,013 449,093 Derivative financial liabilities (333,943) 41,982 (291,961) 233,080 46,804 (12,077) (8,814) (300,775) Repurchase agreements and other similar secured borrowing e (476,912) 306,398 (170,514) - 170,514 - (21,031) (191,545) Total liabilities (810,855) 348,380 (462,475) 233,080 217,318 (12,077) (29,845) (492,320) As at 31 December 2019 Derivative financial assets 260,206 (32,546) 227,660 (175,998) (38,922) 12,740 1,576 229,236 Reverse repurchase agreements and other similar secured lending e 374,274 (276,021) 98,253 - (98,253) - 2,013 100,266 Total assets 634,480 (308,567) 325,913 (175,998) (137,175) 12,740 3,589 329,502 Derivative financial liabilities (255,269) 31,180 (224,089) 175,998 38,632 (9,459) (5,115) (229,204) Repurchase agreements and other similar secured borrowing e (406,081) 276,021 (130,060) - 130,058 (2) (13,004) (143,064) Total liabilities (661,350) 307,201 (354,149) 175,998 168,690 (9,461) (18,119) (372,268) Notes a Amounts offset for d erivative financial assets additionally includes cash collateral ne tted of £ 4,990 m ( 2019 : £ 4,099 m). Amounts offset for d erivative financial liabilities additionally include s cash collateral ne tted of £ 7,313 m ( 2019 : £ 5,465 m) . Settlements assets and liabilities have been offset amounting to £ 18,143 m ( 2019 : £ 14,079 m). b Financial collateral of £ 48,064 m ( 2019 : £ 38,922 m) was received in respect of d erivative assets, including £ 43,291 m ( 2019 : £ 33,411 m) of cash collateral and £ 4,773 m ( 2019 : £ 5,511 m) of non-cash collateral. Financial collateral of £ 46,804 m ( 2019 : £ 38,632 m) was placed in respect of deri vative liabilities, including £ 42,730 m ( 2019 : £ 35,712 m) of cash collateral and £ 4,07 4 m ( 2019 : £ 2,920 m) of non-cash collateral. The collateral amounts are limited to net balance sheet exposure so as to not include overcollateralisation. c This column includes contractual rights of set-off that are subject to uncertainty under the laws of the relevant jurisdiction. d The balance sheet total is the sum of ‘Net amounts reported on the balance sheet’ that are subject to enforceable netting arrangements and ‘Amounts not subject to enforceable netting a rrangements’. e Reverse repurchase agreements and other similar secured lending of £ 146,647 m ( 2019 : £ 100,266 m) is split by fair value £ 137,616 m ( 2019 : £ 96,887 m) and amortised cost £ 9,031 m ( 2019 : £ 3,379 m). Repurchase agreements and other similar secu red borrowing of £ 191,545 m ( 2019 : £ 143,064 m) is split by fair va lue £ 177,371 m ( 2019 : £ 128,547 m) and amo rtised cost £ 14,174 m ( 2019 : £ 14,517 m).

Loans and advances and deposits

Loans and advances and deposits at amortised cost (Table)	12 Months Ended
	Dec. 31, 2020
Disclosure of detailed information about financial instruments [line items]
Loans and advances at amortised cost	15 Financial assets at fair value through other comprehensive income Accounting for financial assets at fair value through oth er comprehensive income (FVOCI ) Financial assets that are debt instruments held in a business model that is achieved by both collecting contractual cash flows and selling and that contain contractual terms that give rise on specified dates to cash flows that are SPPI are measured at FVOCI. They are subsequently re - measured at fair value and changes therein (except for t hose relating to impairment, interest income and foreign currency exchange gains and losses) are recognised in other comprehensive income until the assets are sold. Interest (calculated using the effective interest method) is recognised in the income state ment in net interest income (Note 3 ). Upon disposal, the cumulative gain or loss recognised in other comprehensive income is in cluded in net investment income (N ote 6). In determining whether the business model is achieved by both collecting contractua l cash flows and selling financial assets, it is determined that both collecting contractual cash flows and selling financial assets are integral to achieving the objective of the business model. T he Group will consider past sales and expectations abo ut future sales to establish if the business model is achieved . For equity securities that are not held for trading, the Group may make an irrevocable election on initial recognition to present subsequent changes in the fair value of the instrument i n other comprehensive income (except for dividend income which is recognised in profit or loss). Gains or losses on the de - recognition of these equity securities are not transferred to profit or loss. These assets are also not subject to the impairment req uirements and therefore no amounts are recycled to the income statement. Where the Group has not made the irrevocable election to present subsequent changes in the fair value of the instrument in other comprehensive income, equity securities are measu red at fair value through profit or loss. 2020 2019 £m £m Debt securities and other eligible bills 77,736 64,103 Equity securities 761 1,023 Loans and advances 191 624 Financial assets at fair value through other comprehensive income 78,688 65,750

Property, plant and equipment (

Property, plant and equipment (Table)	12 Months Ended
	Dec. 31, 2020
20. Property, plant and equipment
Property, plant and equipment	Investment property Property Equipment Leased assets Right of use assets a Total £m £m £m £m £m £m Cost As at 1 January 2020 13 3,938 2,977 9 1,826 8,763 Additions - 193 246 - 85 524 Disposals (1) (96) (100) - (14) (211) Exchange and other movements (2) (33) (41) - 37 (39) As at 31 December 2020 10 4,002 3,082 9 1,934 9,037 Accumulated depreciation and impairment As at 1 January 2020 - (1,901) (2,306) (9) (332) (4,548) Depreciation charge - (187) (223) - (231) (641) Impairment - (25) (2) - (15) (42) Disposals - 82 92 - 2 176 Exchange and other movements - 18 27 - 9 54 As at 31 December 2020 - (2,013) (2,412) (9) (567) (5,001) Net book value 10 1,989 670 - 1,367 4,036 Cost As at 1 January 2019 9 3,684 2,956 9 1,748 8,406 Additions 5 377 337 - 95 814 Disposals - (73) (251) - (10) (334) Exchange and other movements (1) (50) (65) - (7) (123) As at 31 December 2019 13 3,938 2,977 9 1,826 8,763 Accumulated depreciation and impairment As at 1 January 2019 - (1,792) (2,322) (9) (104) (4,227) Depreciation charge - (178) (229) - (226) (633) Impairment - (11) (1) - (2) (14) Disposals - 56 205 - - 261 Exchange and other movements - 24 41 - - 65 As at 31 December 2019 - (1,901) (2,306) (9) (332) (4,548) Net book value 13 2,037 671 - 1,494 4,215 Note a Right of use (ROU) asset balances relate to property leases under IFRS 16. Refer to Note 21 for further details.

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 2020
21. Leases
Finance lease receivables	2020 2019 Gross investment in finance lease receivables Future finance income Present value of minimum lease payments receivable Unguaranteed residual values Gross investment in finance lease receivables Future finance income Present value of minimum lease payments receivable Unguaranteed residual values £m £m £m £m £m £m £m £m Not more than one year 535 (26) 509 70 1,403 (115) 1,288 77 One to two year 312 (15) 297 45 909 (76) 833 53 Two to three year 215 (12) 203 52 593 (49) 544 45 Three to four year 107 (6) 101 27 354 (28) 326 43 Four to five year 52 (3) 49 18 123 (8) 115 19 Over five years 24 (1) 23 13 115 (17) 98 22 Total 1,245 (63) 1,182 225 3,497 (293) 3,204 259
Finance lease income	Finance lease income Finance lease income is i ncluded within interest income. The f ollowing table shows amounts recognised in the income s tatement during the year. 2020 2019 £m £m Finance income from net investment in lease 55 141 (Loss)/profit on sales (25) 6
Lease liabilities and Lease liabilities maturity analysis	Lease liabilities 2020 2019 £m £m As at 1 January 1,563 1,696 Interest expense 70 76 New leases 85 94 Disposals (15) (19) Cash payments (306) (289) Exchange and other movements 47 5 As at 31 December (see Note 23) 1,444 1,563 The below table sets out a maturity analysis of undiscounted lease liabilities , showing the lease payments to be paid after the reporting date . Undiscounted lease liabilities maturity analysis 2020 2019 £m £m Not more than one year 255 296 One to two years 221 252 Two to three years 198 208 Three to four years 176 186 Four to five years 162 165 Five to ten years 557 565 Greater than ten years 248 310 Total undiscounted lease liabilities as at 31 December 1,817 1,982

Goodwill and intangible assets

Goodwill and intangible assets (Tables)	12 Months Ended
	Dec. 31, 2020
22. Goodwill and intangible assets
Intangible assets	Intangible assets Goodwill Internally generated software Other software Customer lists Licences and other Total £m £m £m £m £m £m 2020 Cost As at 1 January 2020 4,760 6,643 505 1,465 489 13,862 Additions and disposals (37) 646 131 - 22 762 Exchange and other movements (7) (42) 3 (46) (21) (113) As at 31 December 2020 4,716 7,247 639 1,419 490 14,511 Accumulated amortisation and impairment As at 1 January 2020 (861) (2,989) (279) (1,250) (364) (5,743) Disposals 37 97 10 - 3 147 Amortisation charge - (771) (51) (43) (33) (898) Impairment charge - (147) (6) - - (153) Exchange and other movements (1) 31 (2) 41 15 84 As at 31 December 2020 (825) (3,779) (328) (1,252) (379) (6,563) Net book value 3,891 3,468 311 167 111 7,948 2019 Cost As at 1 January 2019 4,768 5,835 389 1,630 558 13,180 Additions and disposals - 857 120 (124) (39) 814 Exchange and other movements (8) (49) (4) (41) (30) (132) As at 31 December 2019 4,760 6,643 505 1,465 489 13,862 Accumulated amortisation and impairment As at 1 January 2019 (861) (2,362) (254) (1,359) (371) (5,207) Disposals - 67 25 124 37 253 Amortisation charge - (716) (52) (49) (37) (854) Impairment charge - (17) (2) - - (19) Exchange and other movements - 39 4 34 7 84 As at 31 December 2019 (861) (2,989) (279) (1,250) (364) (5,743) Net book value 3,899 3,654 226 215 125 8,119
Goodwill	Goodwill Goodwill and Intangible assets are allocated to business operations a ccording to business segments as follows: 2020 2019 Goodwill Intangibles Total Goodwill Intangibles Total £m £m £m £m £m £m Barclays UK 3,560 1,618 5,178 3,526 1,520 5,046 Barclays International 289 2,435 2,724 329 2,686 3,015 Head Office 42 4 46 44 14 58 Total 3,891 4,057 7,948 3,899 4,220 8,119
The assumptions used in the impairment test and the sensitivity of value in use to changes in the key assumptions	The outcome of the impairment review for Personal Banking and Business Banking are set out below Cash generating unit Tangible equity Goodwill Intangibles Carrying value Value in use Value in use exceeding carrying value Value in use exceeding carrying value 2019 £m £m £m £m £m £m £m Personal Banking 4,650 2,752 1,407 8,809 8,932 123 2,570 Business Banking 1,353 629 190 2,172 2,912 740 1,981 Total 6,003 3,381 1,597 10,981 11,844 863 4,551 The sensitivity of the value in use to key judgements in the calculations is set out below: Cash generating unit Carrying value Value in use Value in use exceeding carrying value Discount rate Terminal growth rate Reduction in headroom Change required to reduce headroom to zero 100 bps increase in the discount rate 100 bps decrease in terminal growth rate 50 bps increase to allocated capital rate 10% reduction in forecasted cash flows Discount rate Terminal growth rate Allocated capital rate Cashflows £m £m £m % % £m £m £m £m % % % % Personal Banking 8,809 8,932 123 13.51 2.0 (893) (623) (220) (972) 0.1 (0.2) 0.3 (1.3) Business Banking 2,172 2,912 740 13.81 2.0 (205) (128) (60) (206) 4.6 (9.7) 6.2 (35.9) Total 10,981 11,844 863

Other liabilities (Table)

Other liabilities (Table)	12 Months Ended
	Dec. 31, 2020
23. Other liabilities
Other liabilities	23 O ther liabilities 2020 2019 £m £m Accruals and deferred income 3,683 3,472 Other creditors 3,447 3,257 Items in the course of collection due to other banks 88 213 Lease liabilities (refer to Note 21) 1,444 1,563 Other liabilities 8,662 8,505

Provisions (Tables)

Provisions (Tables)	12 Months Ended
	Dec. 31, 2020
24. Provisions
Provisions	Undrawn contractually committed facilities and guarantees a Customer redress Legal, competition and regulatory matters Onerous contracts Redundancy and restructuring Payment Protection Insurance Other customer redress Sundry provisions Total £m £m £m £m £m £m £m £m As at 1 January 2020 42 143 322 1,155 420 376 306 2,764 Additions 24 194 806 - 186 106 192 1,508 Amounts utilised (13) (109) - (979) (195) (171) (118) (1,585) Unused amounts reversed (25) (60) (30) (47) (44) (45) (92) (343) Exchange and other movements - (10) (34) - 1 2 1 (40) As at 31 December 2020 28 158 1,064 129 368 268 289 2,304 Note a Und rawn contractually committed facilities and guarantees provisions are accounted for under IFRS 9.

Contingent liabilities and co_2

Contingent liabilities and commitments (Table)	12 Months Ended
	Dec. 31, 2020
25. Contingent liabilities and commitments
Contingent liabilities and commitments	The following table summarises the n ominal principal amount of contingent liabilities and commitments which are not recorded on-balance sheet: 2020 2019 £m £m Guarantees and letters of credit pledged as collateral security 15,665 17,606 Performance guarantees, acceptances and endorsements 5,944 6,921 Total contingent liabilities 21,609 24,527 Of which: Financial guarantees carried at fair value 229 43 Documentary credits and other short-term trade related transactions 1,086 1,291 Standby facilities, credit lines and other commitments 331,963 333,164 Total commitments 333,049 334,455 Of which: Loan commitments carried at fair value 9,269 17,679

Subordinated Liabilities (Table

Subordinated Liabilities (Tables)	12 Months Ended
	Dec. 31, 2020
Disclosure of detailed information about borrowings [line items]
Subordinated liabilities	2020 2019 £m £m As at 1 January 18,156 20,559 Issuances 1,438 1,352 Redemptions (3,464) (3,248) Other 211 (507) As at 31 December 16,341 18,156 2020 2019 £m £m Undated subordinated liabilities 308 303 Dated subordinated liabilities 16,033 17,853 Total subordinated liabilities 16,341 18,156
Undated subordinated liabilities [member]
Disclosure of detailed information about borrowings [line items]
Subordinated liabilities	Undated subordinated liabilities a 2020 2019 Initial call date £m £m Barclays Bank PLC issued Tier One Notes (TONs) 6% Callable Perpetual Core Tier One Notes 2032 17 16 6.86% Callable Perpetual Core Tier One Notes (USD 179m) 2032 205 203 Reserve Capital Instruments (RCIs) 5.3304% Step-up Callable Perpetual Reserve Capital Instruments 2036 56 53 Undated Notes Junior Undated Floating Rate Notes (USD 38m) Any interest payment date 28 29 Total undated subordinated liabilities 308 303 Note a Instrument values are disclosed to the nearest million .
Dated subordinated liabilities [member]
Disclosure of detailed information about borrowings [line items]
Subordinated liabilities	Dated subordinated liabilities a 2020 2019 Initial call date Maturity date £m £m Barclays PLC issued 2.625% Fixed Rate Subordinated Callable Notes (EUR 1,250m) 2020 2025 - 1,072 2% Fixed Rate Subordinated Callable Notes (EUR 1,500m) 2023 2028 1,384 1,309 4.375% Fixed Rate Subordinated Notes (USD 1,250m) 2024 990 995 3.75% Fixed Rate Resetting Subordinated Callable Notes (SGD 200m) 2025 2030 119 116 3.75% Fixed Rate Resetting Subordinated Callable Notes (GBP 500m) 2025 2030 504 - 5.20% Fixed Rate Subordinated Notes (USD 2,050m) 2026 1,610 1,561 4.836% Fixed Rate Subordinated Callable Notes (USD 2,000m) 2027 2028 1,627 1,578 5.088% Fixed-to-Floating Rate Subordinated Callable Notes (USD 1,500m) 2029 2030 1,213 1,152 3.564% Fixed Rate Resetting Subordinated Callable Notes (USD 1,000m) 2030 2035 703 - Barclays Bank PLC issued 5.14% Lower Tier 2 Notes (USD 1,094m) 2020 - 832 6% Fixed Rate Subordinated Notes (EUR 1,500m) 2021 1,427 1,375 9.5% Subordinated Bonds (ex-Woolwich Plc) 2021 221 239 Subordinated Floating Rate Notes (EUR 100m) 2021 90 85 10% Fixed Rate Subordinated Notes 2021 2,108 2,157 10.179% Fixed Rate Subordinated Notes (USD 1,521m) 2021 1,101 1,123 Subordinated Floating Rate Notes (EUR 50m) 2022 45 43 6.625% Fixed Rate Subordinated Notes (EUR 1,000m) 2022 982 957 7.625% Contingent Capital Notes (USD 3,000m) 2022 1,132 2,284 Subordinated Floating Rate Notes (EUR 50m) 2023 45 42 5.75% Fixed Rate Subordinated Notes 2026 351 350 5.4% Reverse Dual Currency Subordinated Loan (JPY 15,000m) 2027 108 105 6.33% Subordinated Notes 2032 64 62 Subordinated Floating Rate Notes (EUR 68m) 2040 61 58 External issuances by other subsidiaries 2025 146 358 Total dated subordinated liabilities 16,033 17,853 Note a I nstrument values are disclosed to the nearest million .

Ordinary shares, share premiu_2

Ordinary shares, share premium, and other equity (Tables)	12 Months Ended
	Dec. 31, 2020
28. Ordinary shares, share premium, and other equity
Called up share capital, allotted and fully paid	Called up share capital, allotted and fully paid Number of shares Ordinary share capital Ordinary share premium Total share capital and share premium Other equity instruments m £m £m £m £m As at 1 January 2020 17,322 4,331 263 4,594 10,871 Issued to staff under share incentive plans 37 9 34 43 - AT1 securities issuance - - - - 1,142 AT1 securities redemption - - - - (831) Other movements - - - - (10) As at 31 December 2020 17,359 4,340 297 4,637 11,172 As at 1 January 2019 17,133 4,283 28 4,311 9,632 Issued to staff under share incentive plans 76 19 82 101 - Issuances relating to Scrip Dividend Programme 113 29 153 182 - AT1 securities issuance - - - - 3,500 AT1 securities redemption - - - - (2,262) Other movements - - - - 1 As at 31 December 2019 17,322 4,331 263 4,594 10,871
AT1 equity instruments	AT1 equity instruments 2020 2019 Initial call date £m £m AT1 equity instruments - Barclays PLC 8.0% Perpetual Subordinated Contingent Convertible Securities (EUR 1,000m) 2020 - 830 7.875% Perpetual Subordinated Contingent Convertible Securitiesª 2022 986 995 7.875% Perpetual Subordinated Contingent Convertible Securities (USD 1,500m) 2022 1,131 1,131 7.25% Perpetual Subordinated Contingent Convertible Securities 2023 1,245 1,245 7.75% Perpetual Subordinated Contingent Convertible Securities (USD 2,500m) 2023 1,925 1,925 5.875% Perpetual Subordinated Contingent Convertible Securities 2024 1,244 1,244 8% Perpetual Subordinated Contingent Convertible Securities (USD 2,000m) 2024 1,509 1,509 7.125% Perpetual Subordinated Contingent Convertible Securitiesª 2025 994 996 6.375% Perpetual Subordinated Contingent Convertible Securities 2025 996 996 6.125% Perpetual Subordinated Contingent Convertible Securities (USD 1,500m) 2025 1,142 - Total AT1 equity instruments 11,172 10,871 Note a R eported net of securities held by the Group .

Reserves (Table)

Reserves (Table)	12 Months Ended
	Dec. 31, 2020
29. Reserves
Other reserves	2020 2019 £m £m Currency translation reserve 2,871 3,344 Fair value through other comprehensive income reserve 5 (187) Cash flow hedging reserve 1,575 1,002 Own credit reserve (954) (373) Other reserves and treasury shares 964 974 Total 4,461 4,760

Non-controlling interests (Tabl

Non-controlling interests (Tables)	12 Months Ended
	Dec. 31, 2020
30. Non-controlling interests
Non-controlling interests by group	Profit attributable to non-controlling interest Equity attributable to non-controlling interest Dividends paid to non-controlling interest 2020 2019 2020 2019 2020 2019 £m £m £m £m £m £m Barclays Bank PLC issued: – Preference shares 42 41 529 529 42 41 – Upper Tier 2 instruments 37 39 533 691 37 39 Other non-controlling interests (1) - 23 11 - - Total 78 80 1,085 1,231 79 80
Non-controlling interests by instruments	2020 2019 Instrument £m £m Preference Shares: US Dollar Preference Shares 318 318 Euro Preference Shares 211 211 Total Barclays Bank PLC Preference Shares 529 529 Upper Tier 2 Instruments: Undated Floating Rate Primary Capital Notes Series 1 93 93 Undated Floating Rate Primary Capital Notes Series 2 179 179 5.03% Undated Reverse Dual Currency Subordinated Loan (JPY8bn) 39 39 5.0% Reverse Dual Currency Undated Subordinated Loan (JPY12bn) 53 53 Undated Floating Rate Primary Capital Notes Series 3 (£145m) 20 20 9% Permanent Interest Bearing Capital Bonds (£100m) 40 40 7.125% Undated Subordinated Notes (£525m) - 158 6.125% Undated Subordinated Notes (£550m) 34 34 9.25% Perpetual Subordinated Bonds (ex Woolwich) (£150m) 75 75 Total Upper Tier 2 Instruments 533 691

Staff costs (Table)

Staff costs (Table)	12 Months Ended
	Dec. 31, 2020
31. Staff costs
Staff costs	2020 2019 2018 £m £m £m Incentive awards granted: Current year bonus 1,090 1,058 1,131 Deferred bonus 490 432 518 Total incentive awards granted 1,580 1,490 1,649 Reconciliation of incentive awards granted to income statement charge: Less: deferred bonuses granted but not charged in current year (335) (293) (359) Add: current year charges for deferred bonuses from previous years 293 308 299 Other differences between incentive awards granted and income statement charge (34) (48) (33) Income statement charge for performance costs 1,504 1,457 1,556 Other income statement charges: Salaries 4,322 4,332 4,200 Social security costs 613 573 558 Post-retirement benefits a 519 501 619 Other compensation costs 479 480 413 Total compensation costs b 7,437 7,343 7,346 Other resourcing costs: Outsourcing 342 433 594 Redundancy and restructuring 102 132 133 Temporary staff costs 102 256 386 Other 114 151 170 Total other resourcing costs 660 972 1,283 Total staff costs 8,097 8,315 8,629 Notes a Post-retirement benefits charge includes £ 279 m (201 9 : £ 270 m; 201 8 : £ 2 36 m) in respect of defined contribution schemes and £ 240 m (201 9 : £ 231 m; 201 8 : £ 383 m) in respect of defined benefit schemes . b £ 451 m ( 2019 : £ 439 m; 201 8 : £ 296 m) of Group compensation was capitalised as internally generated software.

Share-based payments (Tables)

Share-based payments (Tables)	12 Months Ended
	Dec. 31, 2020
32. Share-based payments
Share-based payment schemes	The charge for the year arising from share-based payment schemes was as follows: Charge for the year 2020 2019 2018 £m £m £m Deferred Share Value Plan and Share Value Plan 245 272 262 Others 184 206 187 Total equity settled 429 478 449 Cash settled 2 3 1 Total share-based payments 431 481 450
Share option and award plans	Share option and award plans The weighted average fair value per award granted, weighted average share price at the date of exercise/ release of shares during the year, weighted average contractual remaining life and number of options and awards outstanding (including those exercisable) at the balance sheet date were as follows: 2020 2019 Weighted average fair value per award granted in year Weighted average share price at exercise/release during year Weighted average remaining contractual life Number of options/ awards outstanding Weighted average fair value per award granted in year Weighted average share price at exercise/release during year Weighted average remaining contractual life Number of options/ awards outstanding £ £ in years (000s) £ £ in years (000s) DSVP and SVP a,b 1.06 1.24 1 416,941 1.43 1.60 1 331,491 Others a 0.23-1.24 1.04-1.68 0-3 356,033 0.40-1.60 1.57-1.70 0-3 232,259 Notes a Options/award granted over Barclays PLC shares. b Weighted average exercise price is not applicable for SVP and DSVP awards as these are not share option schemes.
Movements in options and awards	Movements in options and awards The movement in the number of options and awards for the major s chemes and the weighted average exercise price of options was : DSVP and SVP a,b Others a,c Number (000s) Number (000s) Weighted average ex. price (£) 2020 2019 2020 2019 2020 2019 Outstanding at beginning of year/acquisition date 331,491 274,469 232,259 217,952 1.29 1.41 Granted in the year 232,379 219,392 365,166 215,694 0.84 1.19 Exercised/released in the year (132,376) (145,324) (123,042) (151,827) 1.22 1.21 Less: forfeited in the year (14,553) (17,046) (105,068) (42,331) 1.24 1.51 Less: expired in the year - - (13,282) (7,229) 1.35 2.08 Outstanding at end of year 416,941 331,491 356,033 232,259 0.96 1.29 Of which exercisable: - - 30,833 32,376 1.66 1.32 Notes a Options/award granted over Barclays PLC shares. b Weighted average exercise price is not applicable for SVP and DSVP awards as these are not share option schemes. c The number of awards within Others at the end of the year principally relates to Sharesave (number of awards exercisable at end of year was 11 , 677 , 049 ). The weighted average exercise price relates to Sharesave.

Pension and post-retirement b_2

Pension and post-retirement benefits (Tables)	12 Months Ended
	Dec. 31, 2020
Disclosure of sensitivity analysis for actuarial assumptions [line items]
Income statement charge	Amounts recognised The following tables include amounts recognised in the income statement and an analysis of benefit obligations and scheme assets for all Group defined benefit schemes. The net position is reconciled to the assets and liabilities recognised on the balance sheet. The tables include funded and unfunded post-retirement benefits. Income statement charge 2020 2019 2018 £m £m £m Current service cost 243 231 243 Net finance cost (40) (48) (24) Past service cost (4) - 134 Other movements 1 2 5 Total 200 185 358
Balance sheet reconciliation	Balance sheet reconciliation 2020 2019 Total Of which relates to UKRF Total Of which relates to UKRF £m £m £m £m Benefit obligation at beginning of the year (30,333) (29,304) (28,269) (27,301) Current service cost (243) (217) (231) (210) Interest costs on scheme liabilities (573) (549) (747) (718) Past service cost 4 - - - Remeasurement (loss)/gain – financial (3,439) (3,358) (3,087) (2,964) Remeasurement (loss)/gain – demographic (281) (286) 223 214 Remeasurement (loss)/gain – experience 244 237 277 266 Employee contributions (5) (1) (5) (1) Benefits paid 1,406 1,370 1,459 1,410 Exchange and other movements 30 - 47 - Benefit obligation at end of the year (33,190) (32,108) (30,333) (29,304) Fair value of scheme assets at beginning of the year 32,093 31,362 29,722 29,036 Interest income on scheme assets 613 595 795 774 Employer contribution 265 248 755 731 Remeasurement – return on scheme assets greater than discount rate 3,411 3,328 2,312 2,230 Employee contributions 5 1 5 1 Benefits paid (1,406) (1,370) (1,459) (1,410) Exchange and other movements (268) (249) (37) - Fair value of scheme assets at end of the year 34,713 33,915 32,093 31,362 Net surplus 1,523 1,807 1,760 2,058 Retirement benefit assets 1,814 1,807 2,108 2,058 Retirement benefit liabilities (291) - (348) - Net retirement benefit assets 1,523 1,807 1,760 2,058
Analysis of scheme assets	The value of the assets o f the schemes and their percentage in relation to total scheme assets were as follows : Analysis of scheme assets Total Of which relates to UKRF Quoted a £m Unquoted a £m Value £m % of total fair value of scheme assets % Quoted a £m Unquoted a £m Value £m % of total fair value of scheme assets % As at 31 December 2020 Equities 567 1,498 2,065 5.9 378 1,498 1,876 5.5 Private equities - 2,233 2,233 6.4 - 2,233 2,233 6.6 Bonds - fixed government 4,205 110 4,315 12.4 3,932 110 4,042 11.9 Bonds - index-linked government 10,706 1,014 11,720 33.8 10,697 1,014 11,711 34.6 Bonds - corporate and other 7,439 1,678 9,117 26.3 7,214 1,678 8,892 26.2 Property 10 1,416 1,426 4.1 - 1,416 1,416 4.2 Infrastructure - 1,812 1,812 5.2 - 1,812 1,812 5.3 Cash and liquid assets 64 1,830 1,894 5.5 46 1,830 1,876 5.5 Mixed investment funds 9 - 9 - - - - - Other 14 108 122 0.4 - 57 57 0.2 Fair value of scheme assets 23,014 11,699 34,713 100.0 22,267 11,648 33,915 100.0 As at 31 December 2019 b Equities 942 1,568 2,510 7.8 768 1,568 2,336 7.4 Private equities - 2,083 2,083 6.5 - 2,083 2,083 6.6 Bonds - fixed government 3,574 300 3,874 12.1 3,303 299 3,602 11.5 Bonds - index-linked government 10,355 681 11,036 34.4 10,345 682 11,027 35.2 Bonds - corporate and other 6,260 2,297 8,557 26.6 6,069 2,295 8,364 26.7 Property 11 1,633 1,644 5.1 - 1,633 1,633 5.2 Infrastructure - 1,558 1,558 4.9 - 1,558 1,558 5.0 Cash and liquid assets 596 170 766 2.4 576 169 745 2.4 Mixed investment funds - - - - - - - - Other - 65 65 0.2 - 14 14 - Fair value of scheme assets 21,738 10,355 32,093 100.0 21,061 10,301 31,362 100.0 Notes a Valuations on unquoted assets are provided by the underlying managers or qualified independent valuers. Valuations on complex instruments are based on UKRF custodian valuations. All valuations are determined in accordance with relevant industry guidance. b Analysis of scheme assets for 2019 is restated with a quoted/unquoted split.
Deficit reduction contributions	The deficit reduction contributions agre ed with the UKRF Trustee as part of the 30 September 2019 triennial valuation recovery plan are show n in the table below. Deficit reduction contributions under the 30 September 2019 valuation Year £m Cash paid: 2020 500 Future commitments: 2021 700 2022 294 2023 286 2024 - 2026 -
Defined benefit contributions paid	D efined benefit contributions paid with respect to the UKRF were as follows: Contributions paid £m 2020 748 2019 1,231 2018 741
Key UKRF financial assumptions [member]
Disclosure of sensitivity analysis for actuarial assumptions [line items]
Actuarial valuation of the schemes' obligation based on assumptions	Actuarial valuation of the schemes’ obligation is dependent upon a series of assumptions. Below is a summary of the main financial and demographic assumptions adopted for the UKRF. 2020 2019 Key UKRF financial assumptions % p.a. % p.a. Discount rate 1.29 1.92 Inflation rate (RPI) 2.99 3.02
Assumed life expectancy [member]
Disclosure of sensitivity analysis for actuarial assumptions [line items]
Actuarial valuation of the schemes' obligation based on assumptions	The table below shows how the assumed life expectancy at 60, for members of the UKRF, has varied over the past three years: Assumed life expectancy 2020 2019 2018 Life expectancy at 60 for current pensioners (years) – Males 27.2 27.1 27.7 – Females 29.4 29.3 29.4 Life expectancy at 60 for future pensioners currently aged 40 (years) – Males 29.0 28.9 29.2 – Females 31.2 31.1 31.0
Change in key assumptions [member]
Disclosure of sensitivity analysis for actuarial assumptions [line items]
Actuarial valuation of the schemes' obligation based on assumptions	Sensitivity analysis on actuarial assumptions The sensitivity analysis has been calculated by valuing the UKRF liabilities using the amended assumptions shown in the table below and keeping the remaining assumptions the same as disclosed in the table above, except in the case of the inflation sensitivity where other assumptions that depend on assumed inflation have also been amended correspondingly. The difference between the recalculated liability figure and that stated in the balance sheet reconcilia tion table above is the figure shown. The selection of these movements to illustrate the sensitivity of the defined benefit obligation to key assumptions should not be interpreted as Barclays expressing any specific view of the probability of such movement s happening. Change in key assumptions 2020 2019 (Decrease)/ Increase in UKRF defined benefit obligation (Decrease)/ Increase in UKRF defined benefit obligation £bn £bn Discount rate 0.5% p.a. increase (2.5) (2.3) 0.25% p.a. increase (1.3) (1.2) 0.25% p.a. decrease 1.4 1.2 0.5% p.a. decrease 2.9 2.6 Assumed RPI 0.5% p.a. increase 1.8 1.5 0.25% p.a. increase 0.9 0.8 0.25% p.a. decrease (0.9) (0.7) 0.5% p.a. decrease (1.8) (1.4) Life expectancy at 60 One year increase 1.2 1.0 One year decrease (1.2) (1.0)

Principal subsidiaries (Tables)

Principal subsidiaries (Tables)	12 Months Ended
	Dec. 31, 2020
34. Principal Subsidiaries
Principal subsidiaries details	Principa l subsidiaries for the Group are set out below. This includes those subsidiaries that are most significan t in the context of the Group’s business, results or financial position. Principal place of business or incorporation Percentage of voting rights held Non-controlling interests - proportion of ownership interests Non-controlling interests - proportion of voting interests Company name Nature of business % % % Barclays Bank PLC United Kingdom Banking, holding company 100 2 - Barclays Bank UK PLC United Kingdom Banking, holding company 100 - - Barclays Bank Ireland PLC Ireland Banking 100 - - Barclays Execution Services Limited United Kingdom Service company 100 - - Barclays Capital Inc. United States Securities dealing 100 - - Barclays Capital Securities Limited United Kingdom Securities dealing 100 - - Barclays Securities Japan Limited Japan Securities dealing 100 - - Barclays US LLC United States Holding company 100 - - Barclays Bank Delaware United States Credit card issuer 100 - -
Entities excluded from consolidation	An interest in equity voting rights exceeding 50% would typic ally indicate that the Grou p has control of an entity. However, the entity set out below is excluded from con solidation because the Group does not have exposure to its variable returns. Percentage of voting rights held Equity shareholders' funds Retained profit for the year Country of registration or incorporation Company name % £m £m Cayman Islands Palomino Limited 100 - -

Structured entities (Tables)

Structured entities (Tables)	12 Months Ended
	Dec. 31, 2020
35. Structured entities
Summary of interests in unconsolidated structured entities	The nature and extent of the Group’s interests in structured entities is summarised below: Summary of interests in unconsolidated structured entities Secured financing Short-term traded interests Traded derivatives Other interests Total £m £m £m £m £m As at 31 December 2020 Assets Trading portfolio assets - 11,361 - - 11,361 Financial assets at fair value through the income statement 56,265 - - 2,864 59,129 Derivative financial instruments - - 2,968 - 2,968 Financial assets at fair value through other comprehensive income - - - 153 153 Loans and advances at amortised cost - - - 20,946 20,946 Reverse repurchase agreements and other similar secured lending 10 - - - 10 Other assets - - - 16 16 Total assets 56,275 11,361 2,968 23,979 94,583 Liabilities Derivative financial instruments - - 7,075 - 7,075 As at 31 December 2019 Assets Trading portfolio assets - 9,585 - 76 9,661 Financial assets at fair value through the income statement 32,859 - - 2,659 35,518 Derivative financial instruments - - 2,369 - 2,369 Financial assets at fair value through other comprehensive income - - - 391 391 Loans and advances at amortised cost - - - 19,061 19,061 Reverse repurchase agreements and other similar secured lending 77 - - - 77 Other assets - - - 28 28 Total assets 32,936 9,585 2,369 22,215 67,105 Liabilities Derivative financial instruments - - 3,171 2,437 5,608 Other interests in unconsolidated structured entities The Group’s interests in structured entities not held for the purposes of short-term trading activities are set out below, summarised by the purpose of the entities and limited to significant categories, based on maximum exposure to loss. Nature of interest Multi-seller conduit programmes Lending Other Total £m £m £m £m As at 31 December 2020 Trading portfolio assets - - - - Financial assets at fair value through the income statement - 98 2,766 2,864 Financial assets at fair value through other comprehensive income - 106 47 153 Loans and advances at amortised cost 5,146 12,721 3,079 20,946 Other assets 8 3 5 16 Total on-balance sheet exposures 5,154 12,928 5,897 23,979 Total off-balance sheet notional amounts 11,750 7,555 - 19,305 Maximum exposure to loss 16,904 20,483 5,897 43,284 Total assets of the entity 87,004 159,804 36,083 282,891 As at 31 December 2019 Trading portfolio assets - - 76 76 Financial assets at fair value through the income statement - 159 2,500 2,659 Financial assets at fair value through other comprehensive income - - 391 391 Loans and advances at amortised cost 5,930 8,132 4,999 19,061 Other assets 17 4 7 28 Total on-balance sheet exposures 5,947 8,295 7,973 22,215 Total off-balance sheet notional amounts 8,649 3,751 1,621 14,021 Maximum exposure to loss 14,596 12,046 9,594 36,236 Total assets of the entity 78,716 145,181 34,099 257,996

Investments in associates and_2

Investments in associates and joint ventures (Tables)	12 Months Ended
	Dec. 31, 2020
36. Investments in associates and joint ventures
Investments in associates and joint ventures	2020 2019 Associates Joint ventures Total Associates Joint ventures Total £m £m £m £m £m £m Equity accounted 464 317 781 457 264 721 Held at fair value through profit or loss - 437 437 - 516 516 Total 464 754 1,218 457 780 1,237
Summarised financial information, equity accounted associates and joint ventures	Summarised financ ial information for the Group’s equity accounted associates and joint ventures is set out b elow. The amounts shown are the Group’s share of the net income of the investees for the year ended 31 December 2020 , with the exception of certain undertakings for which the amounts are based on accounts made up to dates not earlier than three months before the balance sheet date. Associates Joint ventures 2020 2019 2020 2019 £m £m £m £m Profit/(loss) from continuing operations (24) 10 24 43 Other comprehensive income/(expense) (3) - (6) 2 Total comprehensive income/(loss) from continuing operations (27) 10 18 45

Securitisations (Tables)

Securitisations (Tables)	12 Months Ended
	Dec. 31, 2020
37. Secutritisations
Transfers of financial assets that do not result in derecognition	The following table shows the carrying amount of securitised assets that have not resulted in full derecognition, together with the associated liabilities, fo r each category of asset on the balance sheet: 2020 2019 Assets Liabilities Assets Liabilities Carrying amount Fair value Carrying amount Fair value Carrying amount Fair value Carrying amount Fair value £m £m £m £m £m £m £m £m Loans and advances at amortised cost Credit cards, unsecured and other retail lending 1,033 1,121 (1,019) (1,033) 3,516 3,678 (2,918) (2,922)
Continuing involvement in financial assets that have been derecognised	The table below shows the potential financial implications of such continuing involvement: Continuing involvement a Gain/(loss) from continuing involvement Carrying amount Fair value Maximum exposure to loss For the year ended Cumulative to 31 December Type of transfer £m £m £m £m £m 2020 Asset backed securities 56 56 56 1 1 Residential mortgage backed securities 49 49 49 1 1 Commercial mortgage backed securities 243 237 243 2 6 Total 348 342 348 4 8 2019 Commercial mortgage backed securities 189 188 189 1 4 Total 189 188 189 1 4 Note a Asse ts which represent the Group’s continuing involvement in derecognised assets are recorded in Loans and advances at amortised cost and Debt s ecurities at F VTP&L .

Assets pledged, collateral re_2

Assets pledged, collateral received and assets transferred (Tables)	12 Months Ended
	Dec. 31, 2020
38. Assets pledged, collateral received and assets transferred
Assets pledged and assets transferred as security against liabilities	The following table summarises the nature and carrying amount of the assets pledged as security against these liabilities: 2020 2019 £m £m Cash collateral and settlements 72,042 64,400 Loans and advances at amortised cost 37,257 39,354 Trading portfolio assets 77,198 65,532 Financial assets at fair value through the income statement 5,584 10,104 Financial assets at fair value through other comprehensive income 22,185 9,278 Assets pledged 214,266 188,668 The following table summarises the transferred financial assets and the associated liabilities: Transferred assets Associated liabilities £m £m At 31 December 2020 Derivatives 77,574 (77,574) Repurchase agreements 65,673 (44,076) Securities lending arrangements 61,183 - Other 9,836 (7,408) 214,266 (129,058) At 31 December 2019 Derivatives 68,609 (68,609) Repurchase agreements 52,840 (35,708) Securities lending arrangements 49,106 - Other 18,113 (12,005) 188,668 (116,322) Included within O ther are agreements where a counterparty's recourse is limited to the transferred assets. The relationship between the transferred assets and the associated liabilities is that holders of notes may only look to cash flows from the securitised assets for payments of principal and interest due to them under the terms of their notes. Carrying value Fair value Transferred assets Associated liabilities Transferred assets Associated liabilities Net position £m £m £m £m £m 2020 Recourse to transferred assets only 1,033 (1,019) 1,121 (1,033) 88 2019 Recourse to transferred assets only 3,516 (2,918) 3,678 (2,922) 756
Collateral held as security for assets	Collateral held as security for assets Under certain transactions, including reverse repurchase agreements and stoc k borrowing transactions, the Group is allowed to resell or re-pledge the collateral held. The fair value at the balance sheet date of collateral accepted and re-pledged or transferred to others was as follows: 2020 2019 £m £m Fair value of securities accepted as collateral 793,573 656,598 Of which fair value of securities re-pledged/transferred to others 685,300 554,988

Related party transactions and

Related party transactions and Directors' remuneration (Tables)	12 Months Ended
	Dec. 31, 2020
39. Related party transactions and Directors' remuneration
Amounts included in the Group's financial statements by category	Amounts included in the Group ’s financial statements, in aggregate, by category of related party ent ity are as follows: Associates Joint ventures Pension funds £m £m £m For the year ended and as at 31 December 2020 Total income - 10 5 Credit impairment charges - - - Operating expenses (26) - (1) Total assets - 1,388 4 Total liabilities 66 - 69 For the year ended and as at 31 December 2019 Total income - 12 5 Credit impairment charges - - - Operating expenses (46) - - Total assets - 1,303 3 Total liabilities - - 75
Disclosure of transactions between related parties [line items]
Remuneration of Directors and other Key Management Personnel	Remuneration of Key Management Personnel Total remuneration awarded to Key Management Personnel below represents the awards made to individuals that have been approved by the Board Remuneration Committee as part of the latest remuneration decisions, and is consistent with the approach adopted for disclosures set out in the Directors’ Remuneration R eport . Costs recognised in the income statement reflect the accounting charge for the year included within operating expenses. The difference between the values awarded an d the recognised income statement charge principally relates to the recognition of deferred costs for prior year awards. Figures are provided for the period that individuals met the definition of Key Management Personnel. 2020 2019 £m £m Salaries and other short-term benefits 41.6 38.5 Pension costs - 0.1 Other long-term benefits 8.2 8.7 Share-based payments 13.2 13.4 Employer social security charges on emoluments 7.2 7.4 Costs recognised for accounting purposes 70.2 68.1 Employer social security charges on emoluments (7.2) (7.4) Other long-term benefits – difference between awards granted and costs recognised - (0.6) Share-based payments – difference between awards granted and costs recognised 1.1 2.2 Total remuneration awarded 64.1 62.3
Disclosure required by the Companies Act 2006	Disclosure required by the Companies Act 2006 The following information regarding the Barclays PLC Board of Directors is presented in accordance with the Companies Act 2006: 2020 2019 £m £m Aggregate emoluments a 8.4 8.5 Amounts paid under LTIPs b - 0.8 8.4 9.3 Notes a The aggregate emoluments include amounts paid for the 2020 year. In addition, deferred share awards for 2020 with a total value at grant of £ 0.6 m ( 2019 : £ 2 m) will be made to James E Staley and Tushar Morzaria which will only vest subject to meeting certain conditions. b No LTIP amounts were received by the Executive Directors in 2020 as the release of the first tranche of the 2017-2019 LTIP was delayed from June 2020 to March 2021. The LTIP figure in the single total figure tabl e for Exe cutive Directors’ 2020 remuneration in the Directors’ Remuneration Report relates to the 2018 – 2020 LTIP cycle.
Related parties [member] | Loans [member]
Disclosure of transactions between related parties [line items]
Related party transactions Loans and deposits outstanding	The Group provides banking services to Key Management Personnel and persons connected to them. Transactions during the year and the balances outstanding were as follows : Loans outstanding 2020 2019 £m £m As at 1 January 7.2 7.2 Loans issued during the year a 2.3 4.8 Loan repayments during the year b (0.3) (4.8) As at 31 December 9.2 7.2 Notes a Includes loans issued to existing Key Management Personnel and new or existing loans issued to newly appointed Key Management Personnel. b Includes loan repayments by existing Key Management Personnel and loans to former Key Management Personnel.
Related parties [member] | Deposits [member]
Disclosure of transactions between related parties [line items]
Related party transactions Loans and deposits outstanding	The Group provides banking services to Key Management Personnel and persons connected to them. Transactions during the year and the balances outstanding were as follows Deposits outstanding 2020 2019 £m £m As at 1 January 12.1 6.9 Deposits received during the year a 41.6 36.0 Deposits repaid during the year b (43.3) (30.8) As at 31 December 10.4 12.1 Notes a Includes deposits received from existing Key Management Personnel and new or existing deposits received from newly appointed Key Management Personnel. b Includes deposits repaid by existing Key Management Personnel and deposits of former Key Management Personnel.

Auditor's remuneration (Tables)

Auditor's remuneration (Tables)	12 Months Ended
	Dec. 31, 2020
40. Auditor's remuneration
Auditor's remuneration	A uditor ’ s remuneration is included within consultancy, legal and professional fees in administration and general expenses and comprises 2020 2019 2018 £m £m £m Audit of the Barclays Group's annual accounts 9 10 8 Other services: Audit of the Company's subsidiaries a 38 35 32 Other audit related fees b 10 9 9 Other services 2 2 2 Total Auditor's remuneration 59 56 51 Notes a Comprises the fees for the statutory audit of subsidiaries both inside and outside the UK and fees for work performed by associates of KPMG in respect of the consolidated financial statements of the Company . b Comprises services in relation to statutory and regulatory filings. These include audit services for the review of the interim financial information under the Listing Rules of the UK listing authority.

Interest rate benchmark reform

Interest rate benchmark reform (Tables)	12 Months Ended
	Dec. 31, 2020
41. Interest rate benchmark reform
Significant hedge accounting exposures impacted by the interest rate benchmark reform	The following table summarises the significant exposures impacted by interest rate benchmark reform as at 31 December 2020: GBP LIBOR USD LIBOR JPY LIBOR CHF LIBOR Others Total £m £m £m £m £m £m Non-derivative financial assets Loans and advances at amortised cost 30,179 18,109 173 18 1,725 50,204 Reverse repurchase agreements and other similar secured lending - 334 - - - 334 Financial assets at fair value through the income statement 3,496 6,373 - 283 209 10,361 Financial assets at fair value through other comprehensive income 186 114 - - 8 308 Non-derivative financial assets 33,861 24,930 173 301 1,942 61,207 Non-derivative financial liabilities Debt securities in issue (1,023) (10,718) (1,201) - - (12,942) Subordinated liabilities (71) (1,592) - - - (1,663) Financial liabilities designated at fair value (149) (1,273) (759) - (139) (2,320) Non-derivative financial liabilities (1,243) (13,583) (1,960) - (139) (16,925) Standby facilities, credit lines and other commitments 18,944 74,011 - 74 15,951 108,980 The table above represents the exposures to interest rate benchmark reform by balance sheet account , which have yet to transition . The exposure disclosed is for positions with contractual matu rities after 31 December 2021. Balances reported at amortised cost are disclosed at their gross carrying value and do not include any expected credit losses that may be held against them. Balances reported at fair value are disclosed at their fair value on the balance sheet date. GBP LIBOR USD LIBOR EONIA JPY LIBOR CHF LIBOR Others Total £m £m £m £m £m £m £m Derivative notional contract amount OTC interest rate derivatives 592,827 2,832,802 457,844 754,206 25,681 41,782 4,705,142 OTC interest rate derivatives - cleared by central counterparty 1,684,553 2,891,029 638,202 1,091,479 119,382 198,113 6,622,758 Exchange traded interest rate derivatives 300,182 333,705 - - 2,494 - 636,381 OTC foreign exchange derivatives 155,285 589,334 - 93,108 31,257 1,921 870,905 OTC equity and stock index derivatives 1,845 7,946 544 1,929 491 2,141 14,896 Derivative notional contract amount 2,734,692 6,654,816 1,096,590 1,940,722 179,305 243,957 12,850,082 The table above represents the derivative exposures to in terest rate benchmark reform, which have yet to transition . The exposure disclosed is for positions with contractual matu rities after 31 December 2021. Derivatives are reported by using the notional contract amount and where derivatives have both pay and receive legs with exposure to benchmark reform such as cross currency swaps, the notional contract amount is disclosed for both legs. As at 31 December 2020, there were £ 264 bn of c ross currency swaps where both the pay and receive legs are impacted by interest rate benchmark reform.
Detail on the contractual maturity of the above exposures	The table below provides detail on the contractual maturity of the above exposures: Over one year but not more than two years Over two years but not more than five years Over five years but not more than ten years Over ten years Total Current benchmark rate £m £m £m £m £m Non-derivative financial assets GBP LIBOR 4,771 11,309 2,409 15,372 33,861 USD LIBOR 8,389 14,654 1,715 172 24,930 JPY LIBOR 11 144 - 18 173 CHF LIBOR 22 73 90 116 301 Other 931 713 60 238 1,942 Non-derivative financial assets 14,124 26,893 4,274 15,916 61,207 Non-derivative financial liabilities GBP LIBOR (1,055) (116) - (72) (1,243) USD LIBOR (5,529) (3,623) (4,174) (257) (13,583) JPY LIBOR (1,289) (145) (241) (285) (1,960) CHF LIBOR - - - - - Other (12) (5) - (122) (139) Non-derivative financial liabilities (7,885) (3,889) (4,415) (736) (16,925) Equity GBP LIBOR - - - (3,500) (3,500) USD LIBOR - - - (3,131) (3,131) Equity - - - (6,631) (6,631) Derivative notional contract amount GBP LIBOR 890,497 767,769 491,063 585,363 2,734,692 USD LIBOR 2,020,529 2,572,716 1,350,762 710,809 6,654,816 EONIA 397,989 421,460 212,185 64,956 1,096,590 JPY LIBOR 327,669 582,200 731,942 298,911 1,940,722 CHF LIBOR 46,868 73,792 46,010 12,635 179,305 Other 50,775 96,657 72,127 24,398 243,957 Derivative notional contract amount 3,734,327 4,514,594 2,904,089 1,697,072 12,850,082 Standby facilities, credit lines and other commitments GBP LIBOR 5,134 12,016 505 1,289 18,944 USD LIBOR 15,368 56,300 735 1,608 74,011 CHF LIBOR - 74 - - 74 Other 2,897 12,170 862 22 15,951 Standby facilities, credit lines and other commitments 23,399 80,560 2,102 2,919 108,980

Other disclosures - Risk Mana_2

Other disclosures - Risk Management and Principal Risks (audited) (Tables)	12 Months Ended
	Dec. 31, 2020
Other disclosures - Risk Management and Principal Risks
Maximum exposure and effects of collateral and other credit enhancements (audited)	Maximum exposure and effects of netting, collateral and risk transfer (audited) Maximum exposure Netting and set-off Cash collateral Non-cash collateral Risk transfer Net exposure As at 31 December 2020 £m £m £m £m £m £m On-balance sheet: Cash and balances at central banks 191,127 - - - - 191,127 Cash collateral and settlement balances 101,367 - - - - 101,367 Loans and advances at amortised cost: Home loans 159,647 - (284) (159,203) (85) 75 Credit cards, unsecured loans and other retail lending 40,813 - (967) (3,825) (195) 35,826 Wholesale loans 142,172 (6,988) (62) (37,103) (23,963) 74,056 Total loans and advances at amortised cost 342,632 (6,988) (1,313) (200,131) (24,243) 109,957 Of which credit-impaired (Stage 3): Home loans 1,813 - (14) (1,796) - 3 Credit cards, unsecured loans and other retail lending 921 - (14) (237) (2) 668 Wholesale loans 2,525 - (4) (872) (232) 1,417 Total credit-impaired loans and advances at amortised cost 5,259 - (32) (2,905) (234) 2,088 Reverse repurchase agreements and other similar secured lending 9,031 - - (9,031) - - Trading portfolio assets: Debt securities 56,482 - - (391) - 56,091 Traded loans 8,348 - - (374) - 7,974 Total trading portfolio assets 64,830 - - (765) - 64,065 Financial assets at fair value through the income statement: Loans and advances 30,879 - (9) (23,677) - 7,193 Debt securities 1,693 - - (292) - 1,401 Reverse repurchase agreements 137,616 - (672) (136,537) - 407 Other financial assets 343 - - - - 343 Total financial assets at fair value through the income statement 170,531 - (681) (160,506) - 9,344 Derivative financial instruments 302,446 (233,080) (43,291) (4,773) (6,409) 14,893 Financial assets at fair value through other comprehensive income 77,927 - - (106) (1,385) 76,436 Other assets 850 - - - - 850 Total on-balance sheet 1,260,741 (240,068) (45,285) (375,312) (32,037) 568,039 Off-balance sheet: Contingent liabilities 21,609 - (1,095) (2,135) (282) 18,097 Loan commitments 333,049 - (128) (40,714) (1,520) 290,687 Total off-balance sheet 354,658 - (1,223) (42,849) (1,802) 308,784 Total 1,615,399 (240,068) (46,508) (418,161) (33,839) 876,823 Maximum exposure and effects of netting, collateral and risk transfer (audited) Maximum exposure Netting and set-off Cash collateral Non-cash collateral Risk transfer Net exposure As at 31 December 2019 £m £m £m £m £m £m On-balance sheet: Cash and balances at central banks 150,258 - - - - 150,258 Cash collateral and settlement balances 83,256 - - - - 83,256 Loans and advances at amortised cost: Home loans 154,479 - (294) (153,939) (70) 176 Credit cards, unsecured loans and other retail lending 55,296 - (778) (5,283) (258) 48,977 Wholesale loans 129,340 (7,636) (148) (39,981) (12,071) 69,504 Total loans and advances at amortised cost 339,115 (7,636) (1,220) (199,203) (12,399) 118,657 Of which credit-impaired (Stage 3): Home loans 1,809 - (2) (1,785) (14) 8 Credit cards, unsecured loans and other retail lending 1,074 - (12) (250) (2) 810 Wholesale loans 1,812 - (9) (909) (20) 874 Total credit-impaired loans and advances at amortised cost 4,695 - (23) (2,944) (36) 1,692 Reverse repurchase agreements and other similar secured lending 3,379 - - (3,379) - - Trading portfolio assets: Debt securities 52,739 - - (423) - 52,316 Traded loans 5,378 - - (134) - 5,244 Total trading portfolio assets 58,117 - - (557) - 57,560 Financial assets at fair value through the income statement: Loans and advances 22,692 - (14) (16,580) (57) 6,041 Debt securities 5,249 - - - - 5,249 Reverse repurchase agreements 96,887 - (1,132) (95,736) - 19 Other financial assets 763 - - - - 763 Total financial assets at fair value through the income statement 125,591 - (1,146) (112,316) (57) 12,072 Derivative financial instruments 229,236 (175,998) (33,411) (5,511) (5,564) 8,752 Financial assets at fair value through other comprehensive income 64,727 - - (305) (1,051) 63,371 Other assets 1,375 - - - - 1,375 Total on-balance sheet 1,055,054 (183,634) (35,777) (321,271) (19,071) 495,301 Off-balance sheet: Contingent liabilities 24,527 - (400) (4,412) (159) 19,556 Loan commitments 334,455 - (84) (47,008) (1,950) 285,413 Total off-balance sheet 358,982 - (484) (51,420) (2,109) 304,969 Total 1,414,036 (183,634) (36,261) (372,691) (21,180) 800,270
Loans and advances at amortised cost by stage and product (audited)	Loans and advances at amortised cost by stage (audited) Gross exposure Impairment allowance Net exposure Stage 1 Stage 2 Stage 3 Total Stage 1 Stage 2 Stage 3 Total As at 31 December 2020 £m £m £m £m £m £m £m £m £m Barclays UK 153,250 23,896 2,732 179,878 332 1,509 1,147 2,988 176,890 Barclays International a 21,048 5,500 1,992 28,540 396 1,329 1,205 2,930 25,610 Head Office 4,267 720 844 5,831 4 51 380 435 5,396 Total Barclays Group retail 178,565 30,116 5,568 214,249 732 2,889 2,732 6,353 207,896 Barclays UK 31,918 4,325 1,126 37,369 13 129 116 258 37,111 Barclays International a 79,911 16,565 2,270 98,746 288 546 859 1,693 97,053 Head Office 570 - 33 603 - - 31 31 572 Total Barclays Group wholesale b 112,399 20,890 3,429 136,718 301 675 1,006 1,982 134,736 Total loans and advances at amortised cost 290,964 51,006 8,997 350,967 1,033 3,564 3,738 8,335 342,632 Off-balance sheet loan commitments and financial guarantee contracts c 289,939 52,891 2,330 345,160 256 758 50 1,064 344,096 Total d 580,903 103,897 11,327 696,127 1,289 4,322 3,788 9,399 686,728 Loan impairment charge and loan loss rate Coverage ratio Loan impairment charge Loan loss rate Stage 1 Stage 2 Stage 3 Total As at 31 December 2020 % % % % £m bps Barclays UK 0.2 6.3 42.0 1.7 1,070 59 Barclays International a 1.9 24.2 60.5 10.3 1,680 589 Head Office 0.1 7.1 45.0 7.5 91 156 Total Barclays Group retail 0.4 9.6 49.1 3.0 2,841 133 Barclays UK - 3.0 10.3 0.7 154 41 Barclays International a 0.4 3.3 37.8 1.7 914 93 Head Office - - 93.9 5.1 - - Total Barclays Group wholesale b 0.3 3.2 29.3 1.4 1,068 78 Total loans and advances at amortised cost 0.4 7.0 41.5 2.4 3,909 111 Off-balance sheet loan commitments and financial guarantee contracts c 0.1 1.4 2.1 0.3 776 Other financial assets subject to impairment d 153 Total e 0.2 4.2 33.4 1.4 4,838 Notes a Private Banking have refined the methodology to classify £ 5 bn of their exposure between Wholesale and Retail during the year. b Includes Wealth and Private Banking exposures measured on an individual customer exposure basis, and excludes Business Banking exposures that are managed on a collective basis. The net impact is a difference in total exposure of £ 7,551 m of balances reported as wholesale loans i n the Loans and advances at amortised cost by product disclosure. c Excludes loan commitments and fi nancial guarantees of £ 9.5 bn carried at fair value. d 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 h ave a total gross exposure of £ 180.3 b n and impairment allowance of £ 165 m . This comprises £ 11 m ECL on £ 175.7 bn Stage 1 assets, £ 9 m on £ 4.4 bn Stage 2 fair value through other comprehensive income assets , other assets, cash collateral and settlement asse ts and £ 145 m on £ 154 m Stage 3 other assets. e The loan loss rate is 138 bps after applying th e total impairment charge of £ 4,838 m. Loans and advances at amortised cost by stage (audited) Gross exposure Impairment allowance Net exposure Stage 1 Stage 2 Stage 3 Total Stage 1 Stage 2 Stage 3 Total As at 31 December 2019 £m £m £m £m £m £m £m £m £m Barclays UK 143,097 23,198 2,446 168,741 198 1,277 974 2,449 166,292 Barclays International 27,886 4,026 1,875 33,787 352 774 1,359 2,485 31,302 Head Office 4,803 500 826 6,129 5 36 305 346 5,783 Total Barclays Group retail 175,786 27,724 5,147 208,657 555 2,087 2,638 5,280 203,377 Barclays UK 27,891 2,397 1,124 31,412 16 38 108 162 31,250 Barclays International 92,615 8,113 1,615 102,343 136 248 447 831 101,512 Head Office 2,974 - 37 3,011 - - 35 35 2,976 Total Barclays Group wholesale a 123,480 10,510 2,776 136,766 152 286 590 1,028 135,738 Total loans and advances at amortised cost 299,266 38,234 7,923 345,423 707 2,373 3,228 6,308 339,115 Off-balance sheet loan commitments and financial guarantee contracts b 321,140 19,185 935 341,260 97 170 55 322 340,938 Total c 620,406 57,419 8,858 686,683 804 2,543 3,283 6,630 680,053 Loan impairment charge and loan loss rate Coverage ratio Loan impairment charge Loan loss rate Stage 1 Stage 2 Stage 3 Total As at 31 December 2019 % % % % £m bps Barclays UK 0.1 5.5 39.8 1.5 661 39 Barclays International 1.3 19.2 72.5 7.4 999 296 Head Office 0.1 7.2 36.9 5.6 27 44 Total Barclays Group retail 0.3 7.5 51.3 2.5 1,687 81 Barclays UK 0.1 1.6 9.6 0.5 33 11 Barclays International 0.1 3.1 27.7 0.8 113 11 Head Office - - 94.6 1.2 - - Total Barclays Group wholesale a 0.1 2.7 21.3 0.8 146 11 Total loans and advances at amortised cost 0.2 6.2 40.7 1.8 1,833 53 Off-balance sheet loan commitments and financial guarantee contracts b - 0.9 5.9 0.1 71 Other financial assets subject to impairment c 8 Total d 0.1 4.4 37.1 1.0 1,912 Notes a Included in the above analysis are Wealth and Private Banking exposures measured on an indi vidual customer exposure basis, and excludes Business Banking exposures that are managed on a collective basis. The net impact is a difference in total exposure of £ 6,434 m of balances reported as wholesale loans in the Loans and advances at amortised cost by product disclosure. b Excludes loan commitments a nd financial guarantees of £ 17 .7 bn carried at fair value. c Other financial assets subject to impair ment not included in the table above include cash collateral and settlement balances, financial assets at fair value through other comprehensiv e income and other assets. These have a total gross exposure of £ 149.3 bn and impairment allowance of £ 24 m. This comprises £ 12 m ECL on £ 148.5 bn Stage 1 assets £ 2 m on £ 0.8 bn Stage 2 fair value through other comprehensive income assets, cash collateral and settlement balances and £ 10 m on £ 10 m Stage 3 other assets. d The loan loss rate is 55 bps after applying the t otal i mpairment charge of £ 1,912 m . Loans and advances at amortised cost by product (audited) Stage 2 As at 31 December 2020 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 Home loans 138,639 16,651 1,785 876 19,312 2,234 160,185 Credit cards, unsecured loans and other retail lending 33,021 9,470 544 306 10,320 3,172 46,513 Wholesale loans 119,304 19,501 1,097 776 21,374 3,591 144,269 Total 290,964 45,622 3,426 1,958 51,006 8,997 350,967 Impairment allowance Home loans 33 57 13 14 84 421 538 Credit cards, unsecured loans and other retail lending 680 2,382 180 207 2,769 2,251 5,700 Wholesale loans 320 650 50 11 711 1,066 2,097 Total 1,033 3,089 243 232 3,564 3,738 8,335 Net exposure Home loans 138,606 16,594 1,772 862 19,228 1,813 159,647 Credit cards, unsecured loans and other retail lending 32,341 7,088 364 99 7,551 921 40,813 Wholesale loans 118,984 18,851 1,047 765 20,663 2,525 142,172 Total 289,931 42,533 3,183 1,726 47,442 5,259 342,632 Coverage ratio % % % % % % % Home loans - 0.3 0.7 1.6 0.4 18.8 0.3 Credit cards, unsecured loans and other retail lending 2.1 25.2 33.1 67.6 26.8 71.0 12.3 Wholesale loans 0.3 3.3 4.6 1.4 3.3 29.7 1.5 Total 0.4 6.8 7.1 11.8 7.0 41.5 2.4 As at 31 December 2019 Gross exposure £m £m £m £m £m £m £m Home loans 135,713 14,733 1,585 725 17,043 2,155 154,911 Credit cards, unsecured loans and other retail lending 46,012 9,759 496 504 10,759 3,409 60,180 Wholesale loans 117,541 9,374 374 684 10,432 2,359 130,332 Total 299,266 33,866 2,455 1,913 38,234 7,923 345,423 Impairment allowance Home loans 22 37 14 13 64 346 432 Credit cards, unsecured loans and other retail lending 542 1,597 159 251 2,007 2,335 4,884 Wholesale loans 143 284 9 9 302 547 992 Total 707 1,918 182 273 2,373 3,228 6,308 Net exposure Home loans 135,691 14,696 1,571 712 16,979 1,809 154,479 Credit cards, unsecured loans and other retail lending 45,470 8,162 337 253 8,752 1,074 55,296 Wholesale loans 117,398 9,090 365 675 10,130 1,812 129,340 Total 298,559 31,948 2,273 1,640 35,861 4,695 339,115 Coverage ratio % % % % % % % Home loans - 0.3 0.9 1.8 0.4 16.1 0.3 Credit cards, unsecured loans and other retail lending 1.2 16.4 32.1 49.8 18.7 68.5 8.1 Wholesale loans 0.1 3.0 2.4 1.3 2.9 23.2 0.8 Total 0.2 5.7 7.4 14.3 6.2 40.7 1.8
Movement in gross exposure and impairment allowance including provisions for loan commitments and financial guarantees (audited)	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. An explanation of the terms: 12-month ECL, lifetime ECL and credit- impaired is included in Note 7 . Transfers between stages in the tables have been reflected as if they had taken place at the beginning of the year. The movements are measured over a 12-month period. Loans and advances at amortised cost (audited) Stage 1 Stage 2 Stage 3 Total Gross exposure ECL Gross exposure ECL Gross exposure ECL Gross exposure ECL £m £m £m £m £m £m £m £m Home loans As at 1 January 2020 135,713 22 17,043 64 2,155 346 154,911 432 Transfers from Stage 1 to Stage 2 (8,724) (1) 8,724 1 - - - - Transfers from Stage 2 to Stage 1 4,618 14 (4,618) (14) - - - - Transfers to Stage 3 (308) - (420) (10) 728 10 - - Transfers from Stage 3 47 1 219 2 (266) (3) - - Business activity in the year 22,548 7 714 2 4 - 23,266 9 Changes to models used for calculation a - - - - - - - - Net drawdowns, repayments, net re-measurement and movements due to exposure and risk parameter changes (6,195) (9) (841) 42 (57) 105 (7,093) 138 Final repayments (9,060) (1) (1,509) (3) (308) (15) (10,877) (19) Disposals c - - - - - - - - Write-offs d - - - - (22) (22) (22) (22) As at 31 December 2020 e 138,639 33 19,312 84 2,234 421 160,185 538 Credit cards, unsecured loans and other retail lending As at 1 January 2020 46,012 542 10,759 2,007 3,409 2,335 60,180 4,884 Transfers from Stage 1 to Stage 2 (6,571) (134) 6,571 134 - - - - Transfers from Stage 2 to Stage 1 3,080 482 (3,080) (482) - - - - Transfers to Stage 3 (712) (25) (1,162) (398) 1,874 423 - - Transfers from Stage 3 76 39 67 12 (143) (51) - - Business activity in the year 5,598 67 324 83 59 28 5,981 178 Changes to models used for calculation a - 13 - 296 - - - 309 Net drawdowns, repayments, net re-measurement and movements due to exposure and risk parameter changes b (9,678) (229) (2,706) 1,174 (10) 1,353 (12,394) 2,298 Final repayments (3,291) (67) (270) (37) (204) (84) (3,765) (188) Disposals c (1,493) (8) (183) (20) (204) (144) (1,880) (172) Write-offs d - - - - (1,609) (1,609) (1,609) (1,609) As at 31 December 2020 e 33,021 680 10,320 2,769 3,172 2,251 46,513 5,700 Wholesale loans As at 1 January 2020 117,541 143 10,432 302 2,359 547 130,332 992 Transfers from Stage 1 to Stage 2 (12,531) (35) 12,531 35 - - - - Transfers from Stage 2 to Stage 1 4,121 40 (4,121) (40) - - - - Transfers to Stage 3 (1,137) (4) (875) (58) 2,012 62 - - Transfers from Stage 3 471 22 247 13 (718) (35) - - Business activity in the year 27,863 46 2,336 149 634 85 30,833 280 Changes to models used for calculation a - - - - - - - - Net drawdowns, repayments, net re-measurement and movements due to exposure and risk parameter changes 13,828 130 3,811 339 (64) 799 17,575 1,268 Final repayments (28,458) (22) (2,977) (29) (299) (59) (31,734) (110) Disposals c (2,394) - (10) - - - (2,404) - Write-offs d - - - - (333) (333) (333) (333) As at 31 December 2020 e 119,304 320 21,374 711 3,591 1,066 144,269 2,097 Loans and advances at amortised cost (audited) Stage 1 Stage 2 Stage 3 Total Gross exposure ECL Gross exposure ECL Gross exposure ECL Gross exposure ECL £m £m £m £m £m £m £m £m Home loans As at 1 January 2019 130,066 31 18,206 82 2,476 351 150,748 464 Transfers from Stage 1 to Stage 2 (9,051) (1) 9,051 1 - - - - Transfers from Stage 2 to Stage 1 8,000 28 (8,000) (28) - - - - Transfers to Stage 3 (199) - (510) (15) 709 15 - - Transfers from Stage 3 43 2 294 3 (337) (5) - - Business activity in the year 24,935 3 734 2 3 - 25,672 5 Changes to models used for calculation a - - - - - - - - Net drawdowns, repayments, net re-measurement and movements due to exposure and risk parameter changes (6,931) (38) (843) 27 (214) 24 (7,988) 13 Final repayments (10,427) (2) (1,827) (4) (454) (13) (12,708) (19) Disposals b (723) (1) (62) (4) (2) - (787) (5) Write-offs c - - - - (26) (26) (26) (26) As at 31 December 2019 d 135,713 22 17,043 64 2,155 346 154,911 432 Credit cards, unsecured loans and other retail lending As at 1 January 2019 45,785 528 12,229 2,304 3,760 2,511 61,774 5,343 Transfers from Stage 1 to Stage 2 (3,604) (72) 3,604 72 - - - - Transfers from Stage 2 to Stage 1 4,522 701 (4,522) (701) - - - - Transfers to Stage 3 (857) (21) (1,264) (448) 2,121 469 - - Transfers from Stage 3 144 103 28 14 (172) (117) - - Business activity in the year 9,664 120 704 123 89 39 10,457 282 Changes to models used for calculation a - 16 - (110) - (7) - (101) Net drawdowns, repayments, net re-measurement and movements due to exposure and risk parameter changes (5,975) (779) 351 806 373 1,836 (5,251) 1,863 Final repayments (3,667) (54) (371) (53) (290) (74) (4,328) (181) Disposals b - - - - (777) (627) (777) (627) Write-offs c - - - - (1,695) (1,695) (1,695) (1,695) As at 31 December 2019 d 46,012 542 10,759 2,007 3,409 2,335 60,180 4,884 Wholesale loans As at 1 January 2019 105,375 129 13,012 329 2,267 505 120,654 963 Transfers from Stage 1 to Stage 2 (3,419) (11) 3,419 11 - - - - Transfers from Stage 2 to Stage 1 5,213 84 (5,213) (84) - - - - Transfers to Stage 3 (501) (2) (650) (19) 1,151 21 - - Transfers from Stage 3 473 35 205 25 (678) (60) - - Business activity in the year 40,837 51 1,757 27 31 - 42,625 78 Changes to models used for calculation a - (9) - (19) - - - (28) Net drawdowns, repayments, net re-measurement and movements due to exposure and risk parameter changes 5,929 (104) 321 85 122 334 6,372 315 Final repayments (34,081) (30) (2,419) (53) (372) (91) (36,872) (174) Disposals b (2,285) - - - - - (2,285) - Write-offs c - - - - (162) (162) (162) (162) As at 31 December 2019 d 117,541 143 10,432 302 2,359 547 130,332 992 Notes a Recoveries and reimbursements includes £364m for reimbursements expected to be received under the arrangement where Group has entered into financial guarantee contracts which provide credit protection over certain loans assets with third parties. Cash recoveries of previously written off amounts to £35m . b Includes foreign exchange and interest and fees in suspense. c Other financial assets subject to impairment not included in the table above include cash collateral and settlement balances, fin ancial assets at fair value through other comprehensive income and other assets. These have a total gross exposure of £180.3bn (December 2019: £149.3bn) and impairment allowance of £165m (December 2019: £24m). This comprises £11m ECL (December 2019: £12m) on £175.7bn Stage 1 assets (December 2019: £148.5bn), £9m (December 2019: £2m) on £4.4bn Stage 2 fair value through other comprehensive i ncome assets, cash collateral and settlement assets (December 2019: £0.8bn) and £145m (December 2019: £10m) on £154m St age 3 other assets (December 2019: £10m). Reconciliation of ECL movement to impairment charge/(release) for the period £m Home loans 128 Credit cards, unsecured loans and other retail lending 2,597 Wholesale loans 1,438 ECL movement excluding assets derecognised due to disposals and write-offs 4,163 Recoveries and reimbursements a (399) Exchange and other adjustments b 145 Impairment charge on loan commitments and financial guarantees 776 Impairment charge on other financial assets c 153 Income statement charge for the period 4,838 Notes a Changes to models u sed for calculation include a £ 309 m adjustment which largely represents model remediation to correct for over recovery of debt in UK unsecured lending. Barclays continually review 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 ensures that the models used continue to reflect the risks inherent across the businesses. b Transfers a nd risk parameters change has seen an ECL increase which is materially driven by stage migration in response to the macroeconomic scenario updates, partially offset by a net release in ECL of £ 0.6 bn due to a reclassification of £ 2 bn gross loans and advance s from Stage 2 to Stage 1 in credit cards and unsecured loans. The reclassification followed a review of back-testing of results which indicated that origination probability of default characteristics were unnecessarily moving S age 1 accounts into S tage 2. c The £ 1.9 bn d isposals reported within Credit cards, unsecured loans and other retail lending portfolio include £ 1.7 bn sale of motor financing business within the Barclays Partner Finance business and £ 0.2 bn relate to debt sale s undertaken during the year. The £ 2.4 bn disposal reported within W holesale loans include sale of debt securities as part of Group Treasury Operations. d In 2020 , gross write-offs amounted to £ 1,964 m (201 9: £ 1,883 m) and post write-off recoveries amounted to £ 35 m (201 9: £ 124 m). Net write-offs represent gross write-offs less post write-off r ecoveries and amounted to £ 1,929 m (201 9: £ 1,759 m). e Other financial assets subject to impairment not included in the table above include cash collateral and settlement bal ances, financial assets at fair value through other comprehensive income and other assets. These have a total gross exposure of £180.3 bn (December 20 19 : £1 49.3 bn) and impairment allowance o f £165 m (December 201 9: £24m). Th is comprises £11 m ECL (December 201 9: £12m) on £175.7 bn Stage 1 assets (December 2019: £148.5bn), £9 m (December 201 9: £2m) on £4.4 bn Stage 2 fair value through other comprehensive income assets, cash collateral and settlement assets (December 201 9 : £0. 8bn) and £145 m (December 201 9 : £ 10m) on £154 m Stage 3 other assets (December 201 9 : £ 10m ). Loan commitments and financial guarantees (audited) Stage 1 Stage 2 Stage 3 Total Gross exposure ECL Gross exposure ECL Gross exposure ECL Gross exposure ECL £m £m £m £m £m £m £m £m Home loans As at 1 January 2020 9,542 - 500 - 4 - 10,046 - Net transfers between stages (82) - 78 - 4 - - - Business activity in the year 7,975 - - - - - 7,975 - Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes (5,332) - (27) - (2) - (5,361) - Limit management and final repayments (242) - (35) - (1) - (278) - As at 31 December 2020 11,861 - 516 - 5 - 12,382 - Credit cards, unsecured loans and other retail lending As at 1 January 2020 125,759 35 6,238 71 250 14 132,247 120 Net transfers between stages (5,477) 43 4,725 (40) 752 (3) - - Business activity in the year 5,214 2 158 3 2 1 5,374 6 Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes 1,298 (22) 1,636 272 (671) 15 2,263 265 Limit management and final repayments (12,423) (3) (640) (1) (104) (4) (13,167) (8) As at 31 December 2020 114,371 55 12,117 305 229 23 126,717 383 Wholesale loans As at 1 January 2020 185,839 62 12,447 99 681 41 198,967 202 Net transfers between stages (28,325) 67 27,319 (72) 1,006 5 - - Business activity in the year 42,917 32 4,708 102 774 2 48,399 136 Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes 13,637 47 (44) 338 (69) (20) 13,524 365 Limit management and final repayments (50,361) (7) (4,172) (14) (296) (1) (54,829) (22) As at 31 December 2020 163,707 201 40,258 453 2,096 27 206,061 681 Loan commitments and financial guarantees (audited) Stage 1 Stage 2 Stage 3 Total Gross exposure ECL Gross exposure ECL Gross exposure ECL Gross exposure ECL £m £m £m £m £m £m £m £m Home loans As at 1 January 2019 6,948 - 546 - 13 - 7,507 - Net transfers between stages (39) - 47 - (8) - - - Business activity in the year 2,848 - - - - - 2,848 - Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes 1 - (40) - - - (39) - Limit management and final repayments (216) - (53) - (1) - (270) - As at 31 December 2019 9,542 - 500 - 4 - 10,046 - Credit cards, unsecured loans and other retail lending As at 1 January 2019 124,611 41 9,016 65 267 20 133,894 126 Net transfers between stages 117 44 (1,082) (43) 965 (1) - - Business activity in the year 14,619 2 218 1 6 6 14,843 9 Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes (1,151) (48) (1,172) 54 (874) (9) (3,197) (3) Limit management and final repayments (12,437) (4) (742) (6) (114) (2) (13,293) (12) As at 31 December 2019 125,759 35 6,238 71 250 14 132,247 120 Wholesale loans As at 1 January 2019 178,430 58 12,564 85 404 2 191,398 145 Net transfers between stages (875) 7 580 (8) 295 1 - - Business activity in the year 53,685 22 2,779 22 16 - 56,480 44 Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes (487) (1) 1,190 36 232 41 935 76 Limit management and final repayments (44,914) (24) (4,666) (36) (266) (3) (49,846) (63) As at 31 December 2019 185,839 62 12,447 99 681 41 198,967 202 Notes a Changes to models u sed for calculation include a £101 m movement in Credit cards, unsecured loans an d other retail lending and a £28 m movement in Wholesale loans. These reflect methodology changes made during the year. Barclays continually review 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 ensures that the models used continue to reflect the risks inherent across the businesses. b The £787 m movement of gross loans and advances disposed of across Home loans relates to the sale of a portfolio of mortgages from the Italian loan book. The £777 m disposal reported within Credit cards, unsecured loans and other retail lending portfolio relates to debt sales undertaken during the ye ar. Finally, disposals of £2,285 m within Wholesale loans relate to the sale of debt securities as part of the Group’s Treasury operations. c In 2019, gross write-offs amounted to £1,883 m (2018: £ 1,891 m) and post writ e-off recoveries amounted to £124 m (2018: £ 195 m). Net write-offs represent gross write-offs less post write-of f recoveries and amounted to £1,759 m (2018: £ 1,696 m). d Other financial assets subject to impairment not inc luded 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 £149.3bn (December 2018: £ 129.9 bn) and impairment allowance o f £24m (December 2018: £ 12 m). This comprises £12m ECL (December 2018: £ 10 m) on £148.5bn Stage 1 assets (December 2018: £ 129.3 bn), £2m (December 2018: £ 2 m) on £0.8bn Stage 2 fair value through other comprehensive income assets, cash collateral and settlemen t assets (December 2018: £ 0.6 bn) and £10m (December 2018: £ nil ) on £10m Stage 3 other assets (December 2018: £ nil ). Reconciliation of ECL movement to impairment charge/(release) for the period £m Home loans (1) Credit cards, unsecured loans and other retail lending 1,863 Wholesale loans 191 ECL movement excluding assets derecognised due to disposals and write-offs 2,053 Recoveries and reimbursements (124) Exchange and other adjustments a (96) Impairment charge on loan commitments and financial guarantees 71 Impairment charge on other financial assets b 8 Income statement charge for the period 1,912 Notes a Includes foreign exchange and interest and fees in suspense. b 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 £149.3bn (December 2018: £129.9bn) and impairment allowance of £24m (December 2018: £12m). This com prises £12m ECL (December 2018: £10m) on £148.5bn Stage 1 assets (December 2018: £129.3bn), £2m (December 2018: £2m) on £0.8bn Stage 2 fair value through other comprehensive income assets, cash collateral and settlement assets (December 2018: £0.6bn) and £10m (December 2018: £nil) on £10m Stage 3 other assets (December 2018: £nil) .
Management adjustments to models for impairment and Economic uncertainty management adjustments to models for impairment (audited)	Management adjustments to models for impairment (audited) 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. M anagement adjustments are reviewed and incorporated into future model development where applicable . Total management adjustments to impairment allowance are presented by product below. Management adjustments to models for impairment (audited) a 2020 2019 Management adjustments to impairment allowances Proportion of total impairment allowances Management adjustments to impairment allowances Proportion of total impairment allowancesb As at 31 December £m % £m % Home loans 131 24.3 57 13.2 Credit cards, unsecured loans and other retail lending 1,234 20.3 308 6.2 Wholesale loans 23 0.8 (25) (2.1) Total 1,388 14.8 340 5.1 Management adjustments to models for impairment charges (audited) a Impairment allowance pre management adjustments c Economic uncertainty adjustments Other adjustments Total impairment allowance As at 31 December 2020 £m £m £m £m Home loans 407 21 110 538 Credit cards, unsecured loans and other retail lending 4,849 1,625 (391) 6,083 Wholesale loans 2,755 421 (398) 2,778 Total 8,011 2,067 (679) 9,399 Note s a Positive values relate to an increase in impairment allowance. b The 2019 comparative figures have been restated to impairment allowance on both drawn and undrawn exposures. c Includes £6. 8 bn of modelled ECL, £0.9bn of individually assessed impairments and £ 0.3 bn ECL from non-modelled exposures.
Core macroeconomic variables for each scenario and the respective scenario weights	The tables below show the key consensus macroeconomic variables used in the five scenarios (3 year annual paths), the probability weights applied to each scenario and the macroeconomic variables by scenario using ‘specific bases’ i.e. the most extreme position of each variable in the context of the scenario, for example, the highest unemployment for downside scenarios and the lowest unemployment for u pside scenarios. 5-year average tables and movement over time graphs provide additional transparency . Annual paths show quarterly averages for the year (unemployment and base rate) or change in the year (GDP and HPI). Expected worst point is the most nega tive quarter in the relevant 3 year period, which is calculated relative to the start point for GDP and HPI. Baseline average macroeconomic variables used in the calculation of ECL 2021 2022 2023 Expected Worst Point As at 31 December 2020 % % % % UK GDP a 6.3 3.3 2.6 1.2 UK unemployment b 6.7 6.4 5.8 7.4 UK HPI c 2.4 2.3 5.0 0.6 UK bank rate - (0.1) - (0.1) US GDP a 3.9 3.1 2.9 1.0 US unemployment d 6.9 5.7 5.6 7.5 US HPI e 2.8 4.7 4.7 0.7 US federal funds rate 0.3 0.3 0.3 0.3 2020 2021 2022 Expected Worst Point As at 31 December 2019 % % % % UK GDP a 1.3 1.5 1.6 0.3 UK unemployment b 4.1 4.2 4.2 4.2 UK HPI c 1.9 3.1 3.6 0.3 UK bank rate 0.6 0.5 0.8 0.5 US GDP a 2.1 1.9 1.9 0.5 US unemployment d 3.6 3.9 4.0 4.0 US HPI e 3.4 2.9 2.8 1.0 US federal funds rate 1.7 1.5 1.7 1.5 Downside 2 average macroeconomic variables used in the calculation of ECL 2021 2022 2023 Expected Worst Point As at 31 December 2020 % % % % UK GDP a (3.9) 6.5 2.6 (11.0) UK unemployment b 8.0 9.3 7.8 10.1 UK HPI c (13.6) (10.8) 0.5 (23.0) UK bank rate (0.2) (0.2) (0.1) (0.2) US GDP a (2.4) 3.6 2.1 (6.0) US unemployment d 13.4 11.9 10.1 13.7 US HPI e (17.2) (0.7) 0.6 (17.8) US federal funds rate 0.3 0.3 0.3 0.3 2020 2021 2022 Expected Worst Point As at 31 December 2019 % % % % UK GDP a 1.3 1.5 1.6 0.3 UK unemployment b 4.1 4.2 4.2 4.2 UK HPI c 1.9 3.1 3.6 0.3 UK bank rate 0.6 0.5 0.8 0.5 US GDP a 2.1 1.9 1.9 0.5 US unemployment d 3.6 3.9 4.0 4.0 US HPI e 3.4 2.9 2.8 1.0 US federal funds rate 1.7 1.5 1.7 1.5 Downside 1 average macroeconomic variables used in the calculation of ECL 2021 2022 2023 Expected Worst Point As at 31 December 2020 % % % % UK GDP a 0.1 6.6 3.2 (7.0) UK unemployment b 7.3 8.0 6.9 8.4 UK HPI c (6.7) (3.5) 1.7 (10.0) UK bank rate (0.1) (0.1) - (0.1) US GDP a 0.4 3.6 2.3 (3.0) US unemployment d 11.0 8.9 6.9 11.5 US HPI e (5.9) 1.8 2.6 (5.9) US federal funds rate 0.3 0.3 0.3 0.3 2020 2021 2022 Expected Worst Point As at 31 December 2019 % % % % UK GDP a 0.6 0.3 0.6 0.1 UK unemployment b 4.7 5.7 5.7 5.8 UK HPI c (2.6) (4.1) (1.7) (8.2) UK bank rate 1.7 2.8 2.8 0.8 US GDP a 1.2 0.4 0.8 0.2 US unemployment d 4.0 5.1 5.3 5.4 US HPI e 1.2 0.5 0.8 0.5 US federal funds rate 2.6 3.0 3.0 2.0 Upside 2 average macroeconomic variables used in the calculation of ECL 2021 2022 2023 Expected Worst Point As at 31 December 2020 % % % % UK GDP a 12.2 5.3 3.9 5.0 UK unemployment b 6.2 5.5 4.8 7.4 UK HPI c 6.6 10.4 10.8 1.1 UK bank rate 0.1 0.3 0.3 0.1 US GDP a 7.1 4.6 4.0 3.4 US unemployment d 5.5 4.3 4.1 6.1 US HPI e 8.8 9.1 8.9 1.7 US federal funds rate 0.3 0.4 0.6 0.3 2020 2021 2022 Expected Worst Point As at 31 December 2019 % % % % UK GDP a 3.0 4.0 3.4 0.9 UK unemployment b 3.7 3.4 3.5 3.9 UK HPI c 6.8 10.8 9.9 1.0 UK bank rate 0.6 0.5 0.5 0.5 US GDP a 3.4 4.2 3.6 1.0 US unemployment d 3.3 3.0 3.0 3.5 US HPI e 7.4 7.6 7.2 1.6 US federal funds rate 1.7 1.5 1.5 1.5 Upside 1 average macroeconomic variables used in the calculation of ECL 2021 2022 2023 Expected Worst Point As at 31 December 2020 % % % % UK GDP a 9.3 3.9 3.4 3.5 UK unemployment b 6.4 6.0 5.2 7.4 UK HPI c 4.6 6.1 6.1 0.8 UK bank rate 0.1 0.1 0.3 0.1 US GDP a 5.5 4.0 3.7 2.1 US unemployment d 6.0 4.8 4.6 6.7 US HPI e 6.8 6.7 6.3 1.4 US federal funds rate 0.3 0.3 0.5 0.3 2020 2021 2022 Expected Worst Point As at 31 December 2019 % % % % UK GDP a 2.2 2.8 2.5 0.6 UK unemployment b 3.9 3.8 3.9 4.0 UK HPI c 5.0 7.0 6.8 0.7 UK bank rate 0.6 0.5 0.5 0.5 US GDP a 2.8 3.3 2.9 0.8 US unemployment d 3.5 3.6 3.7 3.7 US HPI e 5.1 4.7 4.4 1.4 US federal funds rate 1.7 1.5 1.5 1.5 Notes a Average Real GDP seasonally adjusted change in year; expected worst point is the minimum growth relative to Q420 (2019: Q419) based on a 12 quarter period. b Averag e UK unemployment rate 16-year+; expected worst point is the highest rate in the 12 quarter period starting Q121 (2019: Q120) . c Change in year end UK HPI = Halifax All Houses, All Buyers index, relative to prior year end; worst point is based on minimum growth relative to Q420 (2019: Q419) based on a 12 quarter period . d Average US civi lian unemploy ment rate 16-year+; expected worst point is the highest rate in the 12 quarter period starting Q121 (2019: Q120) . e Change in year end US HPI = FHFA house price index, relative to prior year end; worst point is based on minimum growth relative to Q420 (2019: Q419) base d on a 12 quarter period. Scenario probability weighting (audited) Upside 2 Upside 1 Baseline Downside 1 Downside 2 % % % % % As at 31 December 2020 Scenario probability weighting 20.2 24.2 24.7 15.5 15.4 As at 31 December 2019 Scenario probability weighting 10.1 23.1 40.8 22.7 3.3 Macroeconomic variables used in the calculation of ECL (specific bases) a (audited) Upside 2 Upside 1 Baseline Downside 1 Downside 2 % % % % % As at 31 December 2020 UK GDP b 14.2 8.8 0.7 (22.1) (22.1) UK unemployment c 4.0 4.0 5.7 8.4 10.1 UK HPI d 48.2 30.8 3.6 (4.5) (18.3) UK bank rate c 0.1 0.1 - 0.6 0.6 US GDP b 15.7 12.8 1.6 (10.6) (10.6) US unemployment c 3.8 3.8 6.4 13.0 13.7 US HPI d 42.2 30.9 3.8 (3.7) (15.9) US federal funds rate c 0.1 0.1 0.3 1.3 1.3 As at 31 December 2019 UK GDP b 15.4 11.7 1.5 0.2 (4.6) UK unemployment c 3.4 3.8 4.1 5.8 8.8 UK HPI d 41.1 28.8 2.8 (6.3) (31.1) UK bank rate c 0.5 0.5 0.7 2.8 4.0 US GDP b 17.9 14.9 2.1 0.5 (3.0) US unemployment c 3.0 3.5 3.9 5.4 8.5 US HPI d 35.8 23.7 3.2 0.3 (16.7) US federal funds rate c 1.5 1.5 1.8 3.0 3.5 Macroeconomic variables used in the calculation of ECL (5-year averages) a (audited) Upside 2 Upside 1 Baseline Downside 1 Downside 2 % % % % % As at 31 December 2020 UK GDP e 2.5 1.6 0.7 0.1 (0.9) UK unemployment f 5.0 5.3 5.7 6.5 7.2 UK HPI g 8.2 5.5 3.6 (0.2) (3.6) UK bank rate f 0.3 0.2 - - (0.1) US GDP e 2.9 2.4 1.6 0.8 0.1 US unemployment f 5.3 5.7 6.4 8.3 10.4 US HPI g 7.3 5.5 3.8 0.8 (3.0) US federal funds rate f 0.5 0.5 0.3 0.3 0.3 As at 31 December 2019 UK GDP e 2.9 2.2 1.5 0.8 (0.6) UK unemployment f 3.6 3.9 4.1 5.1 7.0 UK HPI g 7.1 5.2 2.8 (1.1) (6.9) UK bank rate f 0.6 0.6 0.7 2.1 3.1 US GDP e 3.4 2.9 2.1 1.3 (0.1) US unemployment f 3.2 3.7 3.9 4.7 6.6 US HPI g 6.3 4.3 3.2 1.6 (3.4) US federal funds rate f 1.7 1.7 1.8 2.8 3.2 Notes a 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. b Maximum growth relative to Q419 (2019: Q418), based on 20 quarter period in Upside scenarios; 5-year yearly average CAGR in Baseline; minimum growth relative to Q419 (2019: Q418), based on 20 quarter period in Downside scenarios. c Lowest quarter in Upside scenarios; 5-year average in Baseline; highest quarter in Downside scenarios. Period based on 20 quarters from Q120 (2019: Q119) d Maximum growth relative to Q419 (2019: Q418), based on 20 quarter period in Upside scenarios; 5-year quarter end CAGR in Baseline; minimum growth relative to Q419 (2019: Q418), based on 20 quarter period in Downside scenarios. e 5 -year yearly average CAGR, starting 2019 (2019: 2018) f 5 -year average, Period based on 20 quarters from Q120 (2019: Q119) g 5 -year quarter end CAGR, starting Q419 (2019: Q418) 2019 data presented on a revised, simplified basis for ease of comparison. The graphs below plot the historical data for GDP growth rate and unemployment rate in the UK and US as well as the forecasted data under each of the five scenarios.
ECL under 100% weighted scenarios for key principal portfolios	ECL under 100% weighted scenarios for modelled portfolios (audited) The table below shows the ECL assuming scenarios have been 100 % weighted. Model exposures are allocated to a stage based on the individual scenario rather than through a probability-weighted approach as required for Barclays reported impairment allowances. As a result, it is not possible to back solve to the final reported weighted ECL from the individual scenarios as a balance may be assigned to a different st age dependen t on the scenario. Model exposure uses exposure at default (EAD) values and is not directly comparable to gross exposure used in prior disclosures. For Credit cards, unsecured loans and other retail lending, an average EAD measure is used (12 month or life time, depending on stage allocation in each scenario). Therefore, the model exposure movement into Stage 2 is higher than the corresponding Stage 1 reduction. All ECL using a m odel is included, with the exception of Treasury assets (£ 13 m of ECL) , providing additional coverage as compared to the 2019 year-end disclosure . Non-modelled exposures and management adjustments are excluded. Management adjustments can be found in the Management adjustments to models for impairment section . Model e xposures allocated to Stage 3 do not change in any of the scenarios as the transition criteria relies only on observable evidence o f default as at 31 December 2020 and not on macroeconomic scenarios. The Downside 2 scenario represents a severe global recession with substanti al falls in both UK and US GDP. Unemployment in UK markets rises towards 10 % and US markets rises towards 14 % and there are substantial falls in asset prices including h ousing. Under the Downside 2 scenario, model exposure moves between stages as the econo mic environment weakens. This ca n be seen in the m ovement of £ 27 bn of model exposure into Stage 2 between the Weighted and Downside 2 scenario. ECL increases in Stage 2 predominantly due to unsecured portfolios as economic conditions deteriorate. Scenarios As at 31 December 2020 Weighted Upside 2 Upside 1 Baseline Downside 1 Downside 2 Stage 1 Model Exposure (£m) Home loans 131,422 134,100 133,246 132,414 130,547 128,369 Credit cards, unsecured loans and other retail lending 51,952 53,271 52,932 51,995 50,168 48,717 Wholesale loans 149,099 155,812 154,578 152,141 144,646 131,415 Stage 1 Model ECL (£m) Home loans 6 4 5 6 14 42 Credit cards, unsecured loans and other retail lending 392 316 340 372 415 415 Wholesale loans 262 242 258 249 278 290 Stage 1 Coverage (%) Home loans - - - - - - Credit cards, unsecured loans and other retail lending 0.8 0.6 0.6 0.7 0.8 0.9 Wholesale loans 0.2 0.2 0.2 0.2 0.2 0.2 Stage 2 Model Exposure (£m) Home loans 19,180 16,502 17,356 18,188 20,055 22,233 Credit cards, unsecured loans and other retail lending 13,399 10,572 11,579 13,176 16,477 19,322 Wholesale loans 32,677 25,963 27,198 29,635 37,130 50,361 Stage 2 Model ECL (£m) Home loans 37 31 32 33 42 63 Credit cards, unsecured loans and other retail lending 2,207 1,618 1,837 2,138 2,865 3,564 Wholesale loans 1,410 952 1,047 1,223 1,771 2,911 Stage 2 Coverage (%) Home loans 0.2 0.2 0.2 0.2 0.2 0.3 Credit cards, unsecured loans and other retail lending 16.5 15.3 15.9 16.2 17.4 18.4 Wholesale loans 4.3 3.7 3.8 4.1 4.8 5.8 Stage 3 Model Exposure (£m) Home loans 1,778 1,778 1,778 1,778 1,778 1,778 Credit cards, unsecured loans and other retail lending 2,585 2,585 2,585 2,585 2,585 2,585 Wholesale loans a 2,211 2,211 2,211 2,211 2,211 2,211 Stage 3 Model ECL (£m) Home loans 307 282 286 290 318 386 Credit cards, unsecured loans and other retail lending 2,003 1,947 1,972 2,001 2,055 2,078 Wholesale loans a 146 128 134 141 157 184 Stage 3 Coverage (%) Home loans 17.3 15.9 16.1 16.3 17.9 21.7 Credit cards, unsecured loans and other retail lending 77.5 75.3 76.3 77.4 79.5 80.4 Wholesale loans a 6.6 5.8 6.1 6.4 7.1 8.3 Total Model ECL (£m) Home loans 350 317 323 329 374 491 Credit cards, unsecured loans and other retail lending 4,602 3,881 4,149 4,511 5,335 6,057 Wholesale loans a 1,818 1,322 1,439 1,613 2,206 3,385 Total ECL 6,770 5,520 5,911 6,453 7,915 9,933 Note a Material wholesale loan defaults are individually assessed across different recovery st rategies. As a result, ECL of £ 902 m is reported as individually assessed i mpairments in the table below. Reconciliation to total ECL £m Total model ECL 6,770 ECL from individually assessed impairments 902 ECL from non-modelled and other management adjustments a 1,727 Total ECL 9,399 Note a Includes £ 1.4 bn of post model adjustments and £0.3bn ECL from non-modelled exposures . Scenarios As at 31 December 2019 Weighted Upside 2 Upside 1 Baseline Downside 1 Downside 2 Stage 1 Model Exposure (£m) Home loans 137,929 139,574 138,992 138,249 136,454 132,505 Credit cards, unsecured loans and other retail lending 68,619 69,190 69,012 68,388 68,309 67,015 Wholesale loans 160,544 162,717 162,058 161,111 157,720 143,323 Stage 1 Model ECL (£m) Home loans 6 4 5 5 7 19 Credit cards, unsecured loans and other retail lending 505 490 495 495 511 528 Wholesale loans 209 162 174 188 271 297 Stage 1 Coverage (%) Home loans - - - - - - Credit cards, unsecured loans and other retail lending 0.7 0.7 0.7 0.7 0.7 0.8 Wholesale loans 0.1 0.1 0.1 0.1 0.2 0.2 Stage 2 Model Exposure (£m) Home loans 16,889 15,245 15,826 16,570 18,364 22,314 Credit cards, unsecured loans and other retail lending 13,406 11,449 12,108 13,075 15,663 19,615 Wholesale loans 15,947 13,773 14,433 15,380 18,770 33,168 Stage 2 Model ECL (£m) Home loans 41 33 34 36 47 170 Credit cards, unsecured loans and other retail lending 1,844 1,412 1,562 1,771 2,384 4,285 Wholesale loans 414 285 323 374 579 1,427 Stage 2 Coverage (%) Home loans 0.2 0.2 0.2 0.2 0.3 0.8 Credit cards, unsecured loans and other retail lending 13.8 12.3 12.9 13.5 15.2 21.8 Wholesale loans 2.6 2.1 2.2 2.4 3.1 4.3 Stage 3 Model Exposure (£m) Home loans 1,670 1,670 1,670 1,670 1,670 1,670 Credit cards, unsecured loans and other retail lending 3,008 3,008 3,008 3,008 3,008 3,008 Wholesale loans a 1,489 1,489 1,489 1,489 1,489 1,489 Stage 3 Model ECL (£m) Home loans 268 262 264 266 272 316 Credit cards, unsecured loans and other retail lending 2,198 2,154 2,174 2,195 2,235 2,292 Wholesale loans a 118 111 114 117 127 128 Stage 3 Coverage (%) Home loans 16.0 15.7 15.8 15.9 16.3 18.9 Credit cards, unsecured loans and other retail lending 73.1 71.6 72.3 73.0 74.3 76.2 Wholesale loans a 7.9 7.4 7.6 7.9 8.5 8.6 Total Model ECL (£m) Home loans 315 299 303 307 326 505 Credit cards, unsecured loans and other retail lending 4,547 4,056 4,231 4,461 5,130 7,105 Wholesale loans a 741 558 611 679 977 1,852 Total ECL 5,603 4,913 5,145 5,447 6,433 9,462 Note a Material wholesale loan defa ults are individually assessed across different recovery str ategies. As a result, ECL of £ 419 m is re ported as individually assessed impairments in the table below. Reconciliation to total ECL a £m Total model ECL 5,603 ECL from individually assessed impairments 419 ECL from non-modelled and other management adjustments 608 Total ECL 6,630 Note a T he table has been re-presented to separately show the impact of individually assessed impairments of £ 419 m. This was included in the Barclays PLC Annual Report 2019 with non-modelled and other adjustments of £ 268 m. Non-modelled and other adjustments are now disclosed within the other management adjustments category of £ 608 m.
Concentrations of Credit Risk by geography and industry (audited)	Credit risk concentrations by geography (audited) United Kingdom Americas Europe Asia Africa and Middle East Total £m £m £m £m £m £m As at 31 December 2020 On-balance sheet: Cash and balances at central banks 66,459 36,063 69,963 17,987 655 191,127 Cash collateral and settlement balances 33,893 27,287 30,121 9,558 508 101,367 Loans and advances at amortised cost 262,231 41,094 24,949 10,728 3,630 342,632 Reverse repurchase agreements and other similar secured lending 10 152 373 8,285 211 9,031 Trading portfolio assets 9,829 31,000 17,107 5,948 946 64,830 Financial assets at fair value through the income statement 34,229 88,327 25,709 14,742 7,524 170,531 Derivative financial instruments 93,430 90,801 101,102 14,532 2,581 302,446 Financial assets at fair value through other comprehensive income 10,672 27,504 28,607 11,006 138 77,927 Other assets 608 185 57 - - 850 Total on-balance sheet 511,361 342,413 297,988 92,786 16,193 1,260,741 Off-balance sheet: Contingent liabilities 5,876 10,122 3,809 1,222 580 21,609 Loan commitments 112,561 175,926 38,836 4,169 1,557 333,049 Total off-balance sheet 118,437 186,048 42,645 5,391 2,137 354,658 Total 629,798 528,461 340,633 98,177 18,330 1,615,399 As at 31 December 2019 On-balance sheet: Cash and balances at central banks 51,477 28,273 54,632 15,130 746 150,258 Cash collateral and settlement balances 27,431 23,595 26,008 5,385 837 83,256 Loans and advances at amortised cost 257,459 46,569 25,599 6,275 3,213 339,115 Reverse repurchase agreements and other similar secured lending 1,005 15 1,056 470 833 3,379 Trading portfolio assets 11,550 27,621 13,397 4,786 763 58,117 Financial assets at fair value through the income statement 29,001 70,849 11,286 12,534 1,921 125,591 Derivative financial instruments 69,844 63,344 83,165 11,189 1,694 229,236 Financial assets at fair value through other comprehensive income 9,444 23,052 24,443 7,665 123 64,727 Other assets 1,170 126 79 - - 1,375 Total on-balance sheet 458,595 283,267 239,628 63,434 10,130 1,055,054 Off-balance sheet: Contingent liabilities 7,539 10,838 3,862 1,562 726 24,527 Loan commitments 105,350 188,109 36,033 3,166 1,797 334,455 Total off-balance sheet 112,889 198,947 39,895 4,728 2,523 358,982 Total 571,484 482,214 279,523 68,162 12,653 1,414,036 Credit risk concentrations by industry (audited) Banks Other financial insti- tutions Manu- facturing Const- ruction and property Govern- ment and central bank Energy and water Whole- sale and retail distri- bution and leisure Business and other services Home loans Cards, unsecured loans and other personal lending Other Total £m £m £m £m £m £m £m £m £m £m £m £m As at 31 December 2020 On-balance sheet: Cash and balances at central banks 56 84 - - 190,981 - - 6 - - - 191,127 Cash collateral and settlement balances 17,986 67,305 375 35 13,946 871 30 575 - - 244 101,367 Loans and advances at amortised cost 8,133 22,062 8,142 26,125 28,445 4,722 12,569 19,538 159,647 41,312 11,937 342,632 Reverse repurchase agreements and other similar secured lending 706 7,964 - - 361 - - - - - - 9,031 Trading portfolio assets 2,743 11,464 4,104 516 35,902 3,052 1,883 2,625 - - 2,541 64,830 Financial assets at fair value through the income statement 21,824 131,943 608 5,668 5,530 13 64 3,712 971 - 198 170,531 Derivative financial instruments 155,767 116,526 4,126 2,725 11,649 3,288 1,235 2,361 - - 4,769 302,446 Financial assets at fair value through other comprehensive income 18,829 5,843 1 425 51,955 - - 733 - - 141 77,927 Other assets 439 224 6 12 1 10 18 98 - 34 8 850 Total on-balance sheet 226,483 363,415 17,362 35,506 338,770 11,956 15,799 29,648 160,618 41,346 19,838 1,260,741 Off-balance sheet: Contingent liabilities 1,150 5,501 3,187 1,260 1,678 3,223 1,005 2,283 - 155 2,167 21,609 Loan commitments 1,813 53,936 39,638 14,002 1,398 25,780 17,165 24,554 12,385 119,807 22,571 333,049 Total off-balance sheet 2,963 59,437 42,825 15,262 3,076 29,003 18,170 26,837 12,385 119,962 24,738 354,658 Total 229,446 422,852 60,187 50,768 341,846 40,959 33,969 56,485 173,003 161,308 44,576 1,615,399 As at 31 December 2019 On-balance sheet: Cash and balances at central banks 7 73 - - 150,178 - - - - - - 150,258 Cash collateral and settlement balances 16,599 55,262 516 64 9,251 536 51 642 - - 335 83,256 Loans and advances at amortised cost 8,788 20,473 8,323 24,403 23,847 5,346 10,031 17,125 154,479 55,232 11,068 339,115 Reverse repurchase agreements and other similar secured lending 1,172 2,134 - - 73 - - - - - - 3,379 Trading portfolio assets 2,872 9,049 2,787 1,053 33,092 2,996 842 3,158 - - 2,268 58,117 Financial assets at fair value through the income statement 10,747 97,849 634 6,909 5,353 45 - 3,569 358 - 127 125,591 Derivative financial instruments 125,323 83,285 2,049 2,273 7,811 3,077 562 1,520 - 2 3,334 229,236 Financial assets at fair value through other comprehensive income 18,596 4,370 - 286 40,763 - - 430 - - 282 64,727 Other assets 897 322 1 5 2 7 2 109 - 18 12 1,375 Total on-balance sheet 185,001 272,817 14,310 34,993 270,370 12,007 11,488 26,553 154,837 55,252 17,426 1,055,054 Off-balance sheet: Contingent liabilities 1,250 8,043 3,549 703 1,981 3,318 1,072 2,831 - 109 1,671 24,527 Loan commitments 1,909 47,815 42,148 14,358 1,704 29,877 14,711 22,932 10,060 124,841 24,100 334,455 Total off-balance sheet 3,159 55,858 45,697 15,061 3,685 33,195 15,783 25,763 10,060 124,950 25,771 358,982 Total 188,160 328,675 60,007 50,054 274,055 45,202 27,271 52,316 164,897 180,202 43,197 1,414,036
Balance Sheet credit quality (audited)	Balance sheet credit quality (audited) PD range Total PD range Total 0.0 to <0.60% 0.60 to <11.35% 11.35 to 100% 0.0 to <0.60% 0.60 to <11.35% 11.35 to 100% £m £m £m £m % % % % As at 31 December 2020 Cash and balances at central banks 191,127 - - 191,127 100 - - 100 Cash collateral and settlement balances 90,633 10,725 9 101,367 89 11 - 100 Loans and advances at amortised cost: Home loans 150,748 6,310 2,589 159,647 94 4 2 100 Credit cards, unsecured and other retail lending 15,870 22,427 2,516 40,813 39 55 6 100 Wholesale loans 105,968 31,538 4,666 142,172 75 22 3 100 Total loans and advances at amortised cost 272,586 60,275 9,771 342,632 79 18 3 100 Reverse repurchase agreements and other similar secured lending 9,019 12 - 9,031 100 - - 100 Trading portfolio assets: Debt securities 51,395 4,871 216 56,482 91 9 - 100 Traded loans 704 5,107 2,537 8,348 9 61 30 100 Total trading portfolio assets 52,099 9,978 2,753 64,830 81 15 4 100 Financial assets at fair value through the income statement: Loans and advances 16,467 14,369 43 30,879 53 47 - 100 Debt securities 1,126 521 46 1,693 66 31 3 100 Reverse repurchase agreements 95,376 41,566 674 137,616 70 30 - 100 Other financial assets 330 13 - 343 96 4 - 100 Total financial assets at fair value through the income statement 113,299 56,469 763 170,531 67 33 - 100 Derivative financial instruments 282,617 19,352 477 302,446 94 6 - 100 Financial assets at fair value through other comprehensive income 77,919 8 - 77,927 100 - - 100 Other assets 778 68 4 850 92 8 - 100 Total on-balance sheet 1,090,077 156,887 13,777 1,260,741 87 12 1 100 As at 31 December 2019 Cash and balances at central banks 150,258 - - 150,258 100 - - 100 Cash collateral and settlement balances 73,122 10,134 - 83,256 88 12 - 100 Loans and advances at amortised cost: Home loans 146,269 5,775 2,435 154,479 94 4 2 100 Credit cards, unsecured and other retail lending 20,750 31,425 3,121 55,296 38 56 6 100 Wholesale loans 97,854 28,150 3,336 129,340 75 22 3 100 Total loans and advances at amortised cost 264,873 65,350 8,892 339,115 78 19 3 100 Reverse repurchase agreements and other similar secured lending 3,290 89 - 3,379 97 3 - 100 Trading portfolio assets: Debt securities 49,117 3,479 143 52,739 93 7 - 100 Traded loans 864 3,219 1,295 5,378 16 60 24 100 Total trading portfolio assets 49,981 6,698 1,438 58,117 86 12 2 100 Financial assets at fair value through the income statement: Loans and advances 14,467 7,993 232 22,692 64 35 1 100 Debt securities 4,806 413 30 5,249 91 8 1 100 Reverse repurchase agreements 62,475 34,232 180 96,887 65 35 - 100 Other financial assets 757 6 - 763 99 1 - 100 Total financial assets at fair value through the income statement 82,505 42,644 442 125,591 66 34 - 100 Derivative financial instruments 216,103 13,012 121 229,236 94 6 - 100 Financial assets at fair value through other comprehensive income 64,727 - - 64,727 100 - - 100 Other assets 1,242 133 - 1,375 90 10 - 100 Total on-balance sheet 906,101 138,060 10,893 1,055,054 86 13 1 100
Credit risk profile by internal PD band for loans and advances at amortised cost, contingent liabilities and loan commitments (audited)	Credit risk profile by internal PD grade for loans and advances at amortised cost (audited) Gross carrying amount Allowance for ECL Net exposure Coverage ratio Grading PD range Credit quality description Stage 1 Stage 2 Stage 3 Total Stage 1 Stage 2 Stage 3 Total % £m £m £m £m £m £m £m £m £m % As at 31 December 2020 1-3 0.0 to <0.05% Strong 82,312 3,095 - 85,407 6 35 - 41 85,366 - 4-5 0.05 to <0.15% Strong 101,309 9,715 - 111,024 34 25 - 59 110,965 0.1 6-8 0.15 to <0.30% Strong 30,697 6,263 - 36,960 47 64 - 111 36,849 0.3 9-11 0.30 to <0.60% Strong 34,601 5,093 - 39,694 120 168 - 288 39,406 0.7 12-14 0.60 to <2.15% Satisfactory 29,498 8,399 - 37,897 379 593 - 972 36,925 2.6 15-19 2.15 to <10% Satisfactory 8,125 9,136 - 17,261 302 1,283 - 1,585 15,676 9.2 19 10 to <11.35% Satisfactory 3,505 4,437 - 7,942 73 195 - 268 7,674 3.4 20-21 11.35 to <100% Higher Risk 917 4,868 - 5,785 72 1,201 - 1,273 4,512 22.0 22 100% Credit Impaired - - 8,997 8,997 - - 3,738 3,738 5,259 41.5 Total 290,964 51,006 8,997 350,967 1,033 3,564 3,738 8,335 342,632 2.4 As at 31 December 2019 1-3 0.0 to <0.05% Strong 91,993 1,615 - 93,608 13 13 - 26 93,582 - 4-5 0.05 to <0.15% Strong 92,668 7,704 - 100,372 12 12 - 24 100,348 - 6-8 0.15 to <0.30% Strong 29,187 4,444 - 33,631 23 5 - 28 33,603 0.1 9-11 0.30 to <0.60% Strong 34,515 2,932 - 37,447 91 16 - 107 37,340 0.3 12-14 0.60 to <2.15% Satisfactory 35,690 4,341 - 40,031 210 187 - 397 39,634 1.0 15-19 2.15 to <10% Satisfactory 9,041 9,190 - 18,231 232 981 - 1,213 17,018 6.7 19 10 to <11.35% Satisfactory 5,235 3,629 - 8,864 62 104 - 166 8,698 1.9 20-21 11.35 to <100% Higher Risk 937 4,379 - 5,316 64 1,055 - 1,119 4,197 21.0 22 100% Credit Impaired - - 7,923 7,923 - - 3,228 3,228 4,695 40.7 Total 299,266 38,234 7,923 345,423 707 2,373 3,228 6,308 339,115 1.8 Credit risk profile by internal PD grade for contingent liabilities (audited) a Gross carrying amount Allowance for ECL Net exposure Coverage ratio Grading PD range Credit quality description Stage 1 Stage 2 Stage 3 Total Stage 1 Stage 2 Stage 3 Total % £m £m £m £m £m £m £m £m £m % As at 31 December 2020 1-3 0.0 to <0.05% Strong 6,178 189 - 6,367 1 - - 1 6,366 - 4-5 0.05 to <0.15% Strong 2,765 428 - 3,193 3 2 - 5 3,188 0.2 6-8 0.15 to <0.30% Strong 1,468 165 - 1,633 3 3 - 6 1,627 0.4 9-11 0.30 to <0.60% Strong 3,524 552 - 4,076 5 33 - 38 4,038 0.9 12-14 0.60 to <2.15% Satisfactory 2,712 546 - 3,258 8 25 - 33 3,225 1.0 15-19 2.15 to <10% Satisfactory 305 398 - 703 7 21 - 28 675 4.0 19 10 to <11.35% Satisfactory 264 423 - 687 17 83 - 100 587 14.6 20-21 11.35 to <100% Higher Risk 40 769 - 809 - 61 - 61 748 7.5 22 100% Credit Impaired - - 654 654 - - 10 10 644 1.5 Total 17,256 3,470 654 21,380 44 228 10 282 21,098 1.3 As at 31 December 2019 1-3 0.0 to <0.05% Strong 6,947 118 - 7,065 3 - - 3 7,062 - 4-5 0.05 to <0.15% Strong 4,199 40 - 4,239 1 - - 1 4,238 - 6-8 0.15 to <0.30% Strong 2,953 103 - 3,056 1 - - 1 3,055 - 9-11 0.30 to <0.60% Strong 4,551 136 - 4,687 2 2 - 4 4,683 0.1 12-14 0.60 to <2.15% Satisfactory 2,529 654 - 3,183 7 8 - 15 3,168 0.5 15-19 2.15 to <10% Satisfactory 663 244 - 907 4 8 - 12 895 1.3 19 10 to <11.35% Satisfactory 421 172 - 593 9 9 - 18 575 3.0 20-21 11.35 to <100% Higher Risk 117 282 - 399 - 30 - 30 369 7.5 22 100% Credit Impaired - - 355 355 - - 5 5 350 1.4 Total 22,380 1,749 355 24,484 27 57 5 89 24,395 0.4 Credit risk profile by internal PD grade for loan commitments (audited) a Gross carrying amount Allowance for ECL Net exposure Coverage ratio Grading PD range Credit quality description Stage 1 Stage 2 Stage 3 Total Stage 1 Stage 2 Stage 3 Total % £m £m £m £m £m £m £m £m £m % As at 31 December 2020 1-3 0.0 to <0.05% Strong 60,525 5,525 - 66,050 4 2 - 6 66,044 - 4-5 0.05 to <0.15% Strong 74,860 6,322 - 81,182 12 16 - 28 81,154 - 6-8 0.15 to <0.30% Strong 51,255 6,719 - 57,974 17 47 - 64 57,910 0.1 9-11 0.30 to <0.60% Strong 43,650 6,950 - 50,600 17 72 - 89 50,511 0.2 12-14 0.60 to <2.15% Satisfactory 30,994 9,908 - 40,902 119 131 - 250 40,652 0.6 15-19 2.15 to <10% Satisfactory 5,702 4,971 - 10,673 27 113 - 140 10,533 1.3 19 10 to <11.35% Satisfactory 4,886 5,129 - 10,015 11 25 - 36 9,979 0.4 20-21 11.35 to <100% Higher Risk 811 3,897 - 4,708 5 124 - 129 4,579 2.7 22 100% Credit Impaired - - 1,676 1,676 - - 40 40 1,636 2.4 Total 272,683 49,421 1,676 323,780 212 530 40 782 322,998 0.2 As at 31 December 2019 1-3 0.0 to <0.05% Strong 85,908 1,025 - 86,933 2 1 - 3 86,930 - 4-5 0.05 to <0.15% Strong 70,112 1,889 - 72,001 5 1 - 6 71,995 - 6-8 0.15 to <0.30% Strong 53,340 1,019 - 54,359 8 1 - 9 54,350 - 9-11 0.30 to <0.60% Strong 44,097 1,592 - 45,689 13 1 - 14 45,675 - 12-14 0.60 to <2.15% Satisfactory 36,112 3,955 - 40,067 30 26 - 56 40,011 0.1 15-19 2.15 to <10% Satisfactory 4,913 3,857 - 8,770 8 55 - 63 8,707 0.7 19 10 to <11.35% Satisfactory 3,662 2,106 - 5,768 4 7 - 11 5,757 0.2 20-21 11.35 to <100% Higher Risk 616 1,993 - 2,609 - 21 - 21 2,588 0.8 22 100% Credit Impaired - - 580 580 - - 50 50 530 8.6 Total 298,760 17,436 580 316,776 70 113 50 233 316,543 0.1 Note a E xcludes loan commitments and financial guarantees of £ 9.5 bn (2019: £ 17.7 bn ) carried at fair value .
Derivative assets (audited)	Derivative assets (audited) 2020 2019 Balance sheet assets Counterparty netting Net exposure Balance sheet assets Counterparty netting Net exposure As at 31 December £m £m £m £m £m £m Foreign exchange 85,115 68,108 17,007 56,606 44,284 12,322 Interest rate 172,334 128,072 44,262 142,468 106,589 35,879 Credit derivatives 4,605 3,584 1,021 8,215 6,589 1,626 Equity and stock index 38,972 32,183 6,789 20,806 17,517 3,289 Commodity derivatives 1,420 1,133 287 1,141 1,019 122 Total derivative assets 302,446 233,080 69,366 229,236 175,998 53,238 Cash collateral held 43,291 33,411 Net exposure less collateral 26,075 19,827
Management Value at Risk (audited)	Management VaR (95%, one day) (audited) 2020 2019 Average High a Low a Average High a Low a For the year ended 31 December £m £m £m £m £m £m Credit risk 20 38 10 12 17 8 Interest rate risk 10 17 6 6 11 3 Equity risk 13 35 6 10 22 5 Basis risk 10 16 7 8 11 6 Spread risk 5 9 3 4 5 3 Foreign exchange risk 5 7 2 3 5 2 Commodity risk 1 1 - 1 2 - Inflation risk 2 3 1 2 3 1 Diversification effect a (34) n/a n/a (23) n/a n/a Total management VaR 32 57 18 23 29 17
Deposit funding (audited)	Deposit funding (audited) 2020 2019 Funding of loans and advances Loans and advances at amortised cost Deposits at amortised cost Loan: deposit ratio a Loan: deposit ratio As at 31 December 2020 £bn £bn % % Barclays UK 214 240 89% 96% Barclays International 123 241 51% 63% Head Office 6 - Barclays Group 343 481 71% 82% Note a The loan: deposit ratio is calculated as loans and advances at amortised cost di vided by deposits at amortised cost.
Contractual maturity of financial assets and liabilities (audited)	Contractual maturity of financial assets and liabilities (audited) As at 31 December 2020 On demand Not more than three months Over three months but not more than six months Over six months but not more than nine months Over nine months but not more than one year Over one year but not more than two years Over two years but not more than three years Over three years but not more than five years Over five years but not more than ten years Over ten years Total £m £m £m £m £m £m £m £m £m £m £m Assets Cash and balances at central banks 190,347 182 598 - - - - - - - 191,127 Cash collateral and settlement balances 1,177 100,190 - - - - - - - - 101,367 Loans and advances at amortised cost 14,098 11,970 8,388 4,956 5,234 25,392 22,133 36,286 47,944 166,231 342,632 Reverse repurchase agreements and other similar secured lending 150 8,698 - - - - 183 - - - 9,031 Trading portfolio assets 127,950 - - - - - - - - - 127,950 Financial assets at fair value through the income statement 17,377 123,044 7,548 6,960 4,151 4,911 1,346 2,431 2,345 5,038 175,151 Derivative financial instruments 301,880 23 - - - 70 55 310 87 21 302,446 Financial assets at fair value through other comprehensive income - 9,655 3,517 1,393 948 6,469 5,566 17,552 24,450 9,138 78,688 Other financial assets 357 451 19 22 - 1 - - - - 850 Total financial assets 653,336 254,213 20,070 13,331 10,333 36,843 29,283 56,579 74,826 180,428 1,329,242 Other assets 20,272 Total assets 1,349,514 Liabilities Deposits at amortised cost 410,894 41,468 15,886 5,073 3,082 2,264 625 601 764 379 481,036 Cash collateral and settlement balances 1,900 83,523 - - - - - - - - 85,423 Repurchase agreements and other similar secured borrowing 4 3,276 - - - 1,400 2,329 7,073 - 92 14,174 Debt securities in issue - 16,344 4,048 5,100 1,937 5,780 10,402 13,608 12,721 5,856 75,796 Subordinated liabilities - 1,589 3,209 294 - 2,192 14 989 6,915 1,139 16,341 Trading portfolio liabilities 47,405 - - - - - - - - - 47,405 Financial liabilities designated at fair value 15,555 172,153 8,677 5,067 2,938 8,594 6,939 8,580 8,344 12,918 249,765 Derivative financial instruments 299,795 1 49 - - 79 67 185 196 403 300,775 Other financial liabilities 101 2,915 49 46 45 738 156 273 436 210 4,969 Total financial liabilities 775,654 321,269 31,918 15,580 8,002 21,047 20,532 31,309 29,376 20,997 1,275,684 Other liabilities 6,948 Total liabilities 1,282,632 Cumulative liquidity gap (122,318) (189,374) (201,222) (203,471) (201,140) (185,344) (176,593) (151,323) (105,873) 53,558 66,882 Contractual maturity of financial assets and liabilities (audited) As at 31 December 2019 On demand Not more than three months Over three months but not more than six months Over six months but not more than nine months Over nine months but not more than one year Over one year but not more than two years Over two years but not more than three years Over three years but not more than five years Over five years but not more than ten years Over ten years Total £m £m £m £m £m £m £m £m £m £m £m Assets Cash and balances at central banks 149,383 766 109 - - - - - - - 150,258 Cash collateral and settlement balances 2,022 81,231 3 - - - - - - - 83,256 Loans and advances at amortised cost 14,824 10,944 13,108 7,738 7,031 21,771 22,478 37,408 40,702 163,111 339,115 Reverse repurchase agreements and other similar secured lending 13 3,097 - - - 77 190 - - 2 3,379 Trading portfolio assets 114,195 - - - - - - - - - 114,195 Financial assets at fair value through the income statement 14,279 89,355 13,979 3,443 1,317 1,664 512 953 2,302 5,282 133,086 Derivative financial instruments 229,063 30 - - - 7 24 9 79 24 229,236 Financial assets at fair value through other comprehensive income - 6,694 3,241 1,164 1,159 7,711 6,521 11,896 21,195 6,169 65,750 Other financial assets 895 441 25 - 14 - - - - - 1,375 Total financial assets 524,674 192,558 30,465 12,345 9,521 31,230 29,725 50,266 64,278 174,588 1,119,650 Other assets 20,579 Total assets 1,140,229 Liabilities Deposits at amortised cost 348,337 42,357 10,671 3,861 4,067 3,935 930 530 545 554 415,787 Cash collateral and settlement balances 3,053 64,275 13 - - - - - - - 67,341 Repurchase agreements and other similar secured borrowing 7 2,755 10 - - 10,007 1,201 470 - 67 14,517 Debt securities in issue - 12,795 6,560 4,147 3,123 8,387 3,325 18,189 14,342 5,501 76,369 Subordinated liabilities - 207 78 75 832 4,979 3,266 1,075 5,979 1,665 18,156 Trading portfolio liabilities 36,916 - - - - - - - - - 36,916 Financial liabilities designated at fair value 13,952 127,939 10,890 6,519 3,798 6,981 6,235 7,706 7,127 13,179 204,326 Derivative financial instruments 228,617 1 - 8 - 36 42 42 88 370 229,204 Other financial liabilities 251 2,361 55 52 50 1,110 138 242 351 409 5,019 Total financial liabilities 631,133 252,690 28,277 14,662 11,870 35,435 15,137 28,254 28,432 21,745 1,067,635 Other liabilities 6,934 Total liabilities 1,074,569 Cumulative liquidity gap (106,459) (166,591) (164,403) (166,720) (169,069) (173,274) (158,686) (136,674) (100,828) 52,015 65,660
Contractual maturity of financial liabilities - undiscounted (audited)	Contractual maturity of financial liabilities - undiscounted (audited) On demand Not more than three months Over three months but not more than six months Over six months but not more than one year Over one year but not more than three years Over three years but not more than five years Over five years but not more than ten years Over ten years Total £m £m £m £m £m £m £m £m £m As at 31 December 2020 Deposits at amortised cost 410,894 41,468 15,886 8,156 2,893 599 768 385 481,049 Cash collateral and settlement balances 1,900 83,523 - - - - - - 85,423 Repurchase agreements and other similar secured borrowing 4 3,276 - - 3,729 7,089 - 154 14,252 Debt securities in issue - 16,368 4,058 7,061 16,684 14,715 14,882 9,852 83,620 Subordinated liabilities - 1,597 3,328 311 2,498 1,152 8,578 1,587 19,051 Trading portfolio liabilities 47,405 - - - - - - - 47,405 Financial liabilities designated at fair value 15,555 172,186 8,683 8,007 15,604 8,586 8,369 20,835 257,825 Derivative financial instruments 299,795 1 49 - 147 187 204 443 300,826 Other financial liabilities 101 2,929 62 116 981 338 557 248 5,332 Total financial liabilities 775,654 321,348 32,066 23,651 42,536 32,666 33,358 33,504 1,294,783 As at 31 December 2019 Deposits at amortised cost 348,337 42,369 10,682 7,946 4,869 532 554 595 415,884 Cash collateral and settlement balances 3,053 64,297 13 - - - - - 67,363 Repurchase agreements and other similar secured borrowing 7 2,758 10 - 11,300 485 - 149 14,709 Debt securities in issue - 12,850 6,589 7,305 12,330 19,132 16,657 9,398 84,261 Subordinated liabilities - 207 78 950 9,822 1,286 7,192 3,025 22,560 Trading portfolio liabilities 36,916 - - - - - - - 36,916 Financial liabilities designated at fair value 13,952 128,064 11,020 10,609 13,507 8,054 7,519 19,392 212,117 Derivative financial instruments 228,617 2 - 8 80 45 99 378 229,229 Other financial liabilities 251 2,372 65 126 1,337 351 565 448 5,515 Total financial liabilities 631,133 252,919 28,457 26,944 53,245 29,885 32,586 33,385 1,088,554
Maturity analysis of off-balance sheet commitments received (audited)	Maturity analysis of off-balance sheet commitments received (audited) On demand Not more than three months Over three months but not more than six months Over six months but not more than nine months Over nine months but not more than one year Over one year but not more than two years Over two years but not more than three years Over three years but not more than five years Over five years but not more than ten years Over ten years Total £m £m £m £m £m £m £m £m £m £m £m As at 31 December 2020 Guarantees, letters of credit and credit insurance 26,368 86 37 68 8 18 14 47 40 25 26,711 Other commitments received 92 - - - - - - - - - 92 Total off-balance sheet commitments received 26,460 86 37 68 8 18 14 47 40 25 26,803 As at 31 December 2019 Guarantees, letters of credit and credit insurance 13,091 106 22 81 - 11 12 21 12 34 13,390 Other commitments received 91 - - - - - - - - - 91 Total off-balance sheet commitments received 13,182 106 22 81 - 11 12 21 12 34 13,481
Maturity analysis of off-balance sheet commitments given (audited)	Maturity analysis of off-balance sheet commitments given (audited) On demand Not more than three months Over three months but not more than six months Over six months but not more than nine months Over nine months but not more than one year Over one year but not more than two years Over two years but not more than three years Over three years but not more than five years Over five years but not more than ten years Over ten years Total £m £m £m £m £m £m £m £m £m £m £m As at 31 December 2020 Contingent liabilities 21,307 213 57 6 1 25 - - - - 21,609 Documentary credits and other short-term trade related transactions 1,084 1 1 - - - - - - - 1,086 Standby facilities, credit lines and other commitments 330,499 564 93 123 95 160 199 202 21 7 331,963 Total off-balance sheet commitments given 352,890 778 151 129 96 185 199 202 21 7 354,658 As at 31 December 2019 Contingent liabilities 23,586 366 86 125 140 143 42 28 3 8 24,527 Documentary credits and other short-term trade related transactions 1,287 3 1 - - - - - - - 1,291 Standby facilities, credit lines and other commitments 328,623 1,133 792 973 639 269 98 273 139 225 333,164 Total off-balance sheet commitments given 353,496 1,502 879 1,098 779 412 140 301 142 233 358,982
Captial resources (audited)	Capital ratios a,b,c As at 31 December 2020 2019 CET1 15.1% 13.8% Tier 1 (T1) 19.0% 17.7% Total regulatory capital 22.1% 21.6% Capital resources (audited) 2020 2019 As at 31 December £m £m Total equity excluding non-controlling interests per the balance sheet 65,797 64,429 Less: other equity instruments (recognised as AT1 capital) (11,172) (10,871) Adjustment to retained earnings for foreseeable dividends and other equity coupons (204) (1,096) Other regulatory adjustments and deductions Additional value adjustments (PVA) (1,146) (1,746) Goodwill and intangible assets (6,914) (8,109) Deferred tax assets that rely on future profitability excluding temporary differences (595) (479) Fair value reserves related to gains or losses on cash flow hedges (1,575) (1,002) Gains or losses on liabilities at fair value resulting from own credit 870 260 Defined benefit pension fund assets (1,326) (1,594) Direct and indirect holdings by an institution of own CET1 instruments (50) (50) Adjustment under IFRS 9 transitional arrangements 2,556 1,126 Other regulatory adjustments 55 (55) CET1 capital 46,296 40,813 AT1 capital Capital instruments and related share premium accounts 11,172 10,871 Qualifying AT1 capital (including minority interests) issued by subsidiaries 646 687 Other regulatory adjustments and deductions (80) (130) AT1 capital 11,738 11,428 T1 capital 58,034 52,241 T2 capital Capital instruments and related share premium accounts 7,836 7,650 Qualifying T2 capital (including minority interests) issued by subsidiaries 1,893 3,984 Credit risk adjustments (excess of impairment over expected losses) 57 16 Other regulatory adjustments and deductions (160) (250) Total regulatory capital 67,660 63,641
Functional currency of the operation (audited)	Functional currency of operations (audited) Foreign currency net investments Borrowings which hedge the net investments Derivatives which hedge the net investments Structural currency exposures pre-economic hedges Economic hedges Remaining structural currency exposures £m £m £m £m £m £m As at 31 December 2020 USD 24,204 (7,666) (764) 15,774 (6,193) 9,581 EUR 5,275 (952) (3) 4,320 (286) 4,034 JPY 582 - - 582 - 582 Other currencies 2,020 (42) (24) 1,954 - 1,954 Total 32,081 (8,660) (791) 22,630 (6,479) 16,151 As at 31 December 2019 USD 25,607 (10,048) (1,111) 14,448 (5,339) 9,109 EUR 3,068 (3) - 3,065 (1,122) 1,943 JPY 533 - - 533 - 533 Other currencies 2,001 - (34) 1,967 - 1,967 Total 31,209 (10,051) (1,145) 20,013 (6,461) 13,552
Net interest income sensitivity (AEaR) by business unit and Analysis of equity sensivity (audited)	Net interest income sensitivity (AEaR) by business unit a (audited) Barclays UK Barclays International Head Office Total £m £m £m £m As at 31 December 2020 +25bps 10 86 4 100 -25bps (141) (263) (4) (408) As at 31 December 2019 +25bps 16 25 4 45 -25bps (57) (74) (4) (135) Net interest income sensitivity (AEaR) by currency (audited) 2020 2019 +25 basis points -25 basis points +25 basis points -25 basis points As at 31 December £m £m £m £m GBP 48 (313) 38 (93) USD 48 (63) 29 (32) EUR 10 (34) (10) (20) Other currencies (6) 2 (12) 10 Total 100 (408) 45 (135) Analysis of equity sensitivity (audited) 2020 2019 +25 basis points -25 basis points +25 basis points -25 basis points As at 31 December £m £m £m £m Net interest income 100 (408) 45 (135) Taxation effects on the above (27) 110 (11) 34 Effect on profit for the year 73 (298) 34 (101) As percentage of net profit after tax 3.0% (12.1%) 1.0% (3.0%) Effect on profit for the year (per above) 73 (298) 34 (101) Fair value through other comprehensive income reserve (437) 453 (321) 329 Cash flow hedge reserve (570) 570 (534) 534 Taxation effects on the above 272 (276) 214 (216) Effect on equity (662) 449 (608) 546 As percentage of equity (1.0%) 0.7% (0.9%) 0.8%

Consolidated cash flow statem_4

Consolidated cash flow statement (Narrative) (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash flow statement
Interest received, classified as operating activities	£ 18,748	£ 34,061	£ 26,254
Interest paid, classified as operating activities	9,577	23,186	16,124
Balances with banks and other regulatory authorities	£ 3,392	£ 4,893	£ 4,717

Significant accounting polici_3

Significant accounting policies (Narrative) (Details)	12 Months Ended
	Dec. 31, 2020
Disclosure of expected impact of initial application of new standards or interpretations [line items]
Nature of business	The Group is a major global financial services provider engaged in retail banking, credit cards, wholesale banking, investment banking, wealth management and investment management services. In addition, separate financial statements have been presented for the holding company.
Description of nature of financial statements	These financial statements are prepared for Barclays PLC and its subsidiaries (the Group) under Section 399 of the Companies Act 2006.
Level of rounding used in financial statements	millions
Description of presentation currency	pounds Sterling
New and amended standards and interpretations
New and amended standards and interpretations	5. New and amended standards and interpretations The accounting policies adopted are consistent with those of the previous financial year, with the exception of the early adoption of Interest Rate Benchmark Reform – Phase 2 (Amendments to IFRS 9, IAS 39, IFRS 7, IFRS 4 and IFRS 16) which was applied from 1 January 2020.
Other disclosures	7. Other disclosures To improve transparency and ease of reference, by concentrating related information in one place, certain disclosures required under IFRS have been included within the Risk review section as follows: Credit risk on pages [00] to [00] and [00] to [00] Market risk on pages [00] to [00] and [00] to [00] Treasury and capital risk – liquidity on pages [00] and [00] to [00] Treasury and capital risk – capital on pages [00] and [00] to [00]. These disclosures are covered by the Audit opinion (included on pages [00] to [00]) where referenced as audited.
Amendments to IFRS 9, IAS 39, IFRS 7, IFRS 4 and IFRS 16 - Interest Rate Benchmark Reform [Member]
New and amended standards and interpretations
New and amended standards and interpretations	IFRS 9, IAS 39, IFRS 7, IFRS 4 and IFRS 16 were amended in August 2020, which are effective for periods beginning on or after 1 January 2021 with earlier adoption permitted. The Group elected to early adopt the amendments with effect from 1 January 2020. The amendments have been endorsed by the EU and by the UK. IFRS 9 allows companies when they first apply IFRS 9, to make an accounting policy choice to continue to apply the hedge accounting requirements of IAS 39. The Group made the election to continue to apply the IAS 39 hedge accounting requirements, and consequently, the amendments to IAS 39 in respect of hedge accounting have been adopted by the Group. The objective of the amendments is to provide certain reliefs to companies when changes are made to the contractual cash flows or hedging relationships resulting from interest rate benchmark reform. The reliefs adopted by the Group have been described below.
Date by which application of new IFRS is required	Jan. 1, 2021
Date as at which entity plans to apply new IFRS initially	Jan. 1, 2020
IFRS 17 - Insurance contracts [member]
New and amended standards and interpretations
Future accounting developments	IFRS 17 – Insurance contracts In May 2017, the IASB issued IFRS 17 Insurance Contracts, a comprehensive new accounting standard for insurance contracts covering recognition and measurement, presentation and disclosure. Once effective, IFRS 17 will replace IFRS 4 Insurance Contracts that was issued in 2005. IFRS 17 applies to all types of insurance contracts (i.e. life, non-life, direct insurance and re-insurance), regardless of the type of entities that issue them, as well as to certain guarantees and financial instruments with discretionary participation features. A few scope exceptions will apply. In June 2020, the IASB published amendments to IFRS 17. The amendments that are relevant to the Group are the scope exclusion for credit card contracts and similar contracts that provide insurance coverage, the optional scope exclusion for loan contracts that transfer significant insurance risk, and the clarification that only financial guarantees issued are in scope of IFRS 9. The amendments also defer the effective date of IFRS 17, including the above amendments, to annual reporting periods beginning on or after 1 January 2023. IFRS 17, including the amendments to IFRS 17, has not yet been endorsed by the EU as of the date that the financial statements are authorised for issue. Following the UK’s withdrawal from the EU on 31 December 2020, the UK-adopted international accounting standards will be applicable. IFRS 17, including the amendments to IFRS 17, has not yet been endorsed by the UK. The Group is currently assessing the expected impact of adopting this standard.

Segmental reporting - Analysis

Segmental reporting - Analysis of results by business (Details) £ in Millions	12 Months Ended
	Dec. 31, 2020GBP (£)Employees	Dec. 31, 2019GBP (£)Employees		Dec. 31, 2018GBP (£)Employees
Disclosure of operating segments [line items]
Total income	£ 21,766	£ 21,632		£ 21,136
Credit impairment charges	(4,838)	(1,912)		(1,468)
Net operating income/(expenses)	16,928	19,720		19,668
Operating costs	(13,434)	(13,359)		(13,627)
UK Bank levy	(299)	(226)		(269)
GMP charge				(140)
Litigation and conduct	(153)	(1,849)		(2,207)
Total operating expenses	(13,886)	(15,434)		(16,243)
Other net income/(expenses)	23	71		69
Profit/(loss) before tax	3,065	4,357	[1]	3,494	[1]
Total assets	£ 1,349,514	£ 1,140,229		£ 1,133,300
Number of employees (full time equivalent) | Employees	83,000	80,800		83,500
Average number of employees (full time equivalent) | Employees	0	82,700
Operating segments [member] | Barclays UK [member]
Disclosure of operating segments [line items]
Total income	£ 6,347	£ 7,353		£ 7,383
Credit impairment charges	(1,467)	(712)		(826)
Net operating income/(expenses)	4,880	6,641		6,557
Operating costs	(4,270)	(3,996)		(4,075)
UK Bank levy	(50)	(41)		(46)
GMP charge				0
Litigation and conduct	(32)	(1,582)		(483)
Total operating expenses	(4,352)	(5,619)		(4,604)
Other net income/(expenses)	18	0		3
Profit/(loss) before tax	546	1,022		1,956
Total assets	£ 289,100	£ 257,800		£ 249,700
Number of employees (full time equivalent) | Employees	21,300	21,400		22,600
Operating segments [member] | Barclays International [member]
Disclosure of operating segments [line items]
Total income	£ 15,921	£ 14,675		£ 14,026
Credit impairment charges	(3,280)	(1,173)		(658)
Net operating income/(expenses)	12,641	13,502		13,368
Operating costs	(8,765)	(9,163)		(9,324)
UK Bank levy	(240)	(174)		(210)
GMP charge				0
Litigation and conduct	(48)	(116)		(127)
Total operating expenses	(9,053)	(9,453)		(9,661)
Other net income/(expenses)	28	69		68
Profit/(loss) before tax	3,616	4,118		3,775
Total assets	£ 1,041,800	£ 861,400		£ 862,100
Number of employees (full time equivalent) | Employees	10,800	11,200		12,400
Head Office [member]
Disclosure of operating segments [line items]
Total income	£ (502)	£ (396)		£ (273)
Credit impairment charges	(91)	(27)		16
Net operating income/(expenses)	(593)	(423)		(257)
Operating costs	(399)	(200)		(228)
UK Bank levy	(9)	(11)		(13)
GMP charge				(140)
Litigation and conduct	(73)	(151)		(1,597)
Total operating expenses	(481)	(362)		(1,978)
Other net income/(expenses)	(23)	2		(2)
Profit/(loss) before tax	(1,097)	(783)		(2,237)
Total assets	£ 18,600	£ 21,000		£ 21,500
Number of employees (full time equivalent) | Employees	50,900	48,200		48,500
[1]	2019 and 2018 comparative figures have been restated to make the cash flow statement more relevant following a review of the disclosure and the accounting policies applied. Amendments have been made to the classification of cash collateral reported within cash and cash equivalents and to the presentation of items within net cash flows from operating and investing activities. Footnotes b and c below quantify the impact of the changes to the respective cash flow categories in prior periods and provide further detail .

Segmental reporting - Analysi_2

Segmental reporting - Analysis of results by business (Narrative) (Details) - GBP (£) £ in Millions	3 Months Ended	12 Months Ended
	Jun. 30, 2020	Dec. 31, 2020	Dec. 31, 2019		Dec. 31, 2018		Apr. 01, 2020
Disclosure of operating segments [line items]
Assets		£ 1,349,514	£ 1,140,229		£ 1,133,300
Net operating income		16,928	19,720		19,668
Loss before tax		£ (3,065)	(4,357)	[1]	(3,494)	[1]
Operating segments [member] | Reportable segments [member]
Disclosure of operating segments [line items]
Description of types of products and services from which each reportable segment derives its revenues		The Group is a British universal bank diversified by business, geography and income type, serving consumer and wholesale customers and clients globally and for segmental reporting purposes it defines its two operating divisions as Barclays UK and Barclays International.
Operating segments [member] | Barclays UK [member]
Disclosure of operating segments [line items]
Description of types of products and services from which each reportable segment derives its revenues		Barclays UK comprises our UK Personal Banking, UK Business Banking and Barclaycard Consumer UK businesses. These businesses are carried on by our UK ring-fenced bank (Barclays Bank UK PLC) and certain other entities within the Group
Assets		£ 289,100	257,800		249,700
Net operating income		4,880	6,641		6,557
Loss before tax		£ (546)	(1,022)		(1,956)
Operating segments [member] | Barclays Partner Finance [Member]
Disclosure of operating segments [line items]
Assets							£ 2,200
Net operating income	£ 19
Loss before tax	£ 5
Operating segments [member] | Barclays International [member]
Disclosure of operating segments [line items]
Description of types of products and services from which each reportable segment derives its revenues		. Barclays International comprises our Corporate and Investment Bank and Consumer, Cards and Payments businesses. These businesses are carried on by our non ring-fenced bank (Barclays Bank PLC) and its subsidiaries, as well as by certain other entities within the Group.
Assets		£ 1,041,800	861,400		862,100
Net operating income		12,641	13,502		13,368
Loss before tax		£ (3,616)	£ (4,118)		£ (3,775)
[1]	2019 and 2018 comparative figures have been restated to make the cash flow statement more relevant following a review of the disclosure and the accounting policies applied. Amendments have been made to the classification of cash collateral reported within cash and cash equivalents and to the presentation of items within net cash flows from operating and investing activities. Footnotes b and c below quantify the impact of the changes to the respective cash flow categories in prior periods and provide further detail .

Segmental reporting - Income by

Segmental reporting - Income by geographic region (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of operating segments [line items]
Total income	£ 21,766	£ 21,632	£ 21,136
United Kingdom [member]
Disclosure of operating segments [line items]
Total income	11,211	11,809	11,529
United Kingdom [member] | Income from individual countries which represent more than 5% of total income [member]
Disclosure of operating segments [line items]
Total income	11,211	11,809	11,529
Europe [member]
Disclosure of operating segments [line items]
Total income	2,059	1,754	1,617
Americas [member]
Disclosure of operating segments [line items]
Total income	7,425	7,064	7,058
Africa and middle east [member]
Disclosure of operating segments [line items]
Total income	36	59	43
Asia [member]
Disclosure of operating segments [line items]
Total income	1,035	946	889
United States [member] | Income from individual countries which represent more than 5% of total income [member]
Disclosure of operating segments [line items]
Total income	£ 7,318	£ 6,939	£ 6,911

Segmental reporting - Income _2

Segmental reporting - Income by geographic region (Narrative) (Details)	12 Months Ended
	Dec. 31, 2020
Disclosure of operating segments [line items]
Description of basis for attributing revenues from external customers to individual countries	The geographical analysis is based on the location of the office where the transactions are recorded

Net interest income (Details)

Net interest income (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
3. Net interest income
Cash and balances with central banks	£ 275	£ 1,091	£ 1,123
Loans and advances at amortised cost	10,180	12,450	12,073
Fair value through other comprehensive income	776	1,032	1,029
Negative interest on liabilities	68	13	35
Other	593	870	281
Interest and similar income	11,892	15,456	14,541
Deposits at amortised cost	(1,030)	(2,449)	(2,250)
Debt securities in issue	(1,360)	(1,906)	(1,677)
Subordinated liabilities	(670)	(1,068)	(1,223)
Negative interest on assets	(344)	(278)	(270)
Other	(366)	(348)	(59)
Interest and similar expense	(3,770)	(6,049)	(5,479)
Net interest income	£ 8,122	£ 9,407	£ 9,062

Net interest income (Narrative)

Net interest income (Narrative) (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of detailed information about financial instruments [line items]
Costs to originate credit card balances	£ 698	£ 697	£ 596
Interest income on impaired financial assets accrued	40	48	53
Interest expense on lease liabilities	70	76
Interest expense	3,770	6,049	5,479
Net investment income	13	1,131	585
Financial guarantee contracts [member]
Disclosure of detailed information about financial instruments [line items]
Interest expense	£ 99	25	1
Net investment income		£ 25	£ 1

Net fee and commission income_2

Net fee and commission income (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Fee type
Revenue from contracts with customers	£ 8,522	£ 9,006	£ 8,775
Other non-contract fee income	119	116	118
Fee and commission income	(8,641)	(9,122)	(8,893)
Fee and commission expenses	(2,070)	(2,362)	(2,084)
Net fee and commission income	6,571	6,760	6,809
Transactional [member]
Fee type
Revenue from contracts with customers	3,163	3,883	3,716
Advisory [member]
Fee type
Revenue from contracts with customers	854	1,080	1,059
Brokerage and execution [member]
Fee type
Revenue from contracts with customers	1,385	1,339	1,226
Underwriting and syndication [member]
Fee type
Revenue from contracts with customers	2,867	2,358	2,462
Other [member]
Fee type
Revenue from contracts with customers	253	346	312
Operating segments [member] | Barclays UK [member]
Fee type
Revenue from contracts with customers	1,252	1,551	1,542
Other non-contract fee income	0	0	0
Fee and commission income	(1,252)	(1,551)	(1,542)
Fee and commission expenses	(308)	(365)	(360)
Net fee and commission income	944	1,186	1,182
Operating segments [member] | Barclays UK [member] | Transactional [member]
Fee type
Revenue from contracts with customers	810	1,074	1,102
Operating segments [member] | Barclays UK [member] | Advisory [member]
Fee type
Revenue from contracts with customers	159	177	209
Operating segments [member] | Barclays UK [member] | Brokerage and execution [member]
Fee type
Revenue from contracts with customers	212	208	153
Operating segments [member] | Barclays UK [member] | Underwriting and syndication [member]
Fee type
Revenue from contracts with customers	0	0	0
Operating segments [member] | Barclays UK [member] | Other [member]
Fee type
Revenue from contracts with customers	71	92	78
Operating segments [member] | Barclays International [member]
Fee type
Revenue from contracts with customers	7,259	7,443	7,206
Other non-contract fee income	119	116	118
Fee and commission income	(7,378)	(7,559)	(7,324)
Fee and commission expenses	(1,754)	(1,990)	(1,707)
Net fee and commission income	5,624	5,569	5,617
Operating segments [member] | Barclays International [member] | Transactional [member]
Fee type
Revenue from contracts with customers	2,353	2,809	2,614
Operating segments [member] | Barclays International [member] | Advisory [member]
Fee type
Revenue from contracts with customers	693	903	850
Operating segments [member] | Barclays International [member] | Brokerage and execution [member]
Fee type
Revenue from contracts with customers	1,173	1,131	1,073
Operating segments [member] | Barclays International [member] | Underwriting and syndication [member]
Fee type
Revenue from contracts with customers	2,867	2,358	2,462
Operating segments [member] | Barclays International [member] | Other [member]
Fee type
Revenue from contracts with customers	173	242	207
Head Office [member]
Fee type
Revenue from contracts with customers	11	12	27
Other non-contract fee income	0	0	0
Fee and commission income	(11)	(12)	(27)
Fee and commission expenses	(8)	(7)	(17)
Net fee and commission income	3	5	10
Head Office [member] | Transactional [member]
Fee type
Revenue from contracts with customers	0	0	0
Head Office [member] | Advisory [member]
Fee type
Revenue from contracts with customers	2	0	0
Head Office [member] | Brokerage and execution [member]
Fee type
Revenue from contracts with customers	0	0	0
Head Office [member] | Underwriting and syndication [member]
Fee type
Revenue from contracts with customers	0	0	0
Head Office [member] | Other [member]
Fee type
Revenue from contracts with customers	£ 9	£ 12	£ 27

Net fee and commission income_3

Net fee and commission income (Narrative) (Details) - GBP (£)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of detailed information about intangible assets [line items]
Contract assets
Contract liabilities
Impairment loss on receivables or contract assets arising from contracts with customers
Capitalised contract costs	£ 141,000,000	159,000,000	125,000,000
Explanation of whether practical expedient is applied for disclosure of transaction price allocated to remaining performance obligations	The Group applies the practical expedient of IFRS 15 and does not disclose information about remaining performance obligations that have original expected durations of one year or less or because the Group has a right to consideration that corresponds directly with the value of the service provided to the client or customer
Amortisation, assets recognised from costs incurred to obtain or fulfil contracts with customers	£ 36,000,000	30,000,000	30,000,000
Description of method used to determine amortisation of assets recognised from costs to obtain or fulfil contracts with customers	Capitalised contract costs are amortised based on the transfer of services to which the asset relates which typically ranges over the expected life of the relationship. In 2020, the amount of amortisation was £36m (2019: £30m; 2018: £30m) and there was no impairment loss recognised in connection with the capitalised contract costs (2019: nil; 2018: nil)
Impairment loss, assets recognised from costs incurred to obtain or fulfil contracts with customers	£ 0
Transactional [member]
Disclosure of detailed information about intangible assets [line items]
Description of methods used to recognise revenue from contracts with customers	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. Transaction and processing fees are recognised at the point in time the transaction occurs or service is performed. Interchange and merchant fees are recognised upon settlement of the card transaction payment. The Group incurs certain card related costs including those related to cardholder reward programmes and payments to co-brand partners. Cardholder reward programmes costs related to customers that settle their outstanding balance each period (transactors) are expensed when incurred and presented in fee and commission expense while costs related to customers that continuously carry an outstanding balance (revolvers) are included in the effective interest rate of the receivable (refer to Note ##Net_Int_Inc). Payments to partners for new cardholder account originations related to transactor accounts are deferred as costs to obtain a contract under IFRS 15, while costs related to revolver accounts are included in the effective interest rate of the receivable (refer to Note ##Net_Int_Inc). Those costs deferred under IFRS 15 are capitalised and amortised over the estimated life of the customer relationship. Payments to co-brand partners based on revenue sharing are presented as a reduction of fee and commission income while payments based on profitability are presented in fee and commission expense.
Advisory [member]
Disclosure of detailed information about intangible assets [line items]
Description of methods used to recognise revenue from contracts with customers	Advisory fees are generated from wealth management services and investment banking advisory services related to mergers, acquisitions and financial restructurings. Wealth management advisory fees are earned over the period the services are provided and are generally recognised quarterly when the market value of client assets is determined. Investment banking advisory fees are recognised at the point in time when the services related to the transaction have been completed under the terms of the engagement. Investment banking advisory costs are recognised as incurred in fee and commission expense if direct and incremental to the advisory services or are otherwise recognised in operating expenses.
Brokerage and execution [member]
Disclosure of detailed information about intangible assets [line items]
Description of methods used to recognise revenue from contracts with customers	Brokerage and execution fees are earned for executing client transactions with various exchanges and over-the-counter markets and assisting clients in clearing transactions. Brokerage and execution fees are recognised at the point in time the associated service has been completed which is generally the trade date of the transaction.
Underwriting and syndication [member]
Disclosure of detailed information about intangible assets [line items]
Description of methods used to recognise revenue from contracts with customers	Underwriting and syndication fees are earned for the distribution of client equity or debt securities and the arrangement and administration of a loan syndication. This includes commitment fees to provide loan financing. Underwriting fees are generally recognised on trade date if there is no remaining contingency, such as the transaction being conditional on the closing of an acquisition or another transaction. Underwriting costs are deferred and recognised in fee and commission expense when the associated underwriting fees are recorded. Syndication fees are earned for arranging and administering a loan syndication; however, the associated fee may be subject to variability until the loan has been syndicated to other syndicate members or until other contingencies have been resolved and therefore the fee revenue is deferred until the uncertainty is resolved. Included in the underwriting and syndication fees are loan commitment fees which are not presented as part of the carrying value of the loan in accordance with IFRS 9. Such commitment fees are recognised over time through to the contractual maturity of the commitment.

Net trading income (Details)

Net trading income (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of detailed information about financial instruments [line items]
Net trading income	£ 7,029	£ 4,235	£ 4,566
Assets held for trading [member] | Liabilities held for trading [member]
Disclosure of detailed information about financial instruments [line items]
Net trading income	5,342	2,941	3,292
Financial assets designated at fair value [member] | Financial liabilities designated at fair value [member]
Disclosure of detailed information about financial instruments [line items]
Net trading income	700	256	267
Financial assets mandatorily at fair value [member]
Disclosure of detailed information about financial instruments [line items]
Net trading income	£ 987	£ 1,038	£ 1,007

Net investment income (Details)

Net investment income (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
6. Net investment income
Net (losses)/gains from financial instruments mandatorily at fair value	£ (50)	£ 510	£ 226
Net gains from disposal of debt instruments at fair value through other comprehensive income	295	502	158
Net (losses)/gains from disposal of financial assets and liabilities measured at amortised cost	(61)	257	38
Dividend income	37	76	91
Net(losses)/gains on other investments	(208)	(214)	72
Net investment income	£ 13	£ 1,131	£ 585

Net investment income (Narrativ

Net investment income (Narrative) (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of detailed information about financial instruments [line items]
Net (losses)/gains from disposal of financial assets and liabilities measured at amortised cost	£ 61	£ (257)	£ (38)
Interest expense	3,770	6,049	5,479
AT1 equity instruments [member] | Fixed Rate Resetting Perpetual Subordinated Contingent Convertible Securities [member] | Barclays PLC [member] | Fixed interest rate [member]
Disclosure of detailed information about financial instruments [line items]
Net (losses)/gains from disposal of financial assets and liabilities measured at amortised cost	115
Financial guarantee contracts [member]
Disclosure of detailed information about financial instruments [line items]
Interest expense	£ 99	25	£ 1
Debt securities [member]
Disclosure of detailed information about financial instruments [line items]
Net (losses)/gains from disposal of financial assets and liabilities measured at amortised cost		£ (170)

Credit impairment charges (Narr

Credit impairment charges (Narrative) (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of impairment loss and reversal of impairment loss [line items]
Information on how entity determined whether credit risk of financial instruments has increased significantly since initial recognition	The Group assesses when a significant increase in credit risk has occurred based on quantitative and qualitative assessments. The credit risk of an exposure is considered to have significantly increased when: Quantitative test The annualised lifetime PD has increased by more than an agreed threshold relative to the equivalent at origination. PD deterioration thresholds are defined as percentage increases, and are set at an origination score band and segment level to ensure the test appropriately captures significant increases in credit risk at all risk levels. Generally, thresholds are inversely correlated to the origination PD, i.e. as the origination PD increases, the threshold value reduces. The assessment of the point at which a PD increase is deemed ‘significant’, is based upon analysis of the portfolio’s risk profile against a common set of principles and performance metrics (consistent across both retail and wholesale businesses), incorporating expert credit judgement where appropriate. Application of quantitative PD floors does not represent the use of the low credit risk exemption as exposures can separately move into Stage 2 via the qualitative route described below. Wholesale assets apply a 100% increase in PD and 0.2% PD floor to determine a significant increase in credit risk. Retail assets apply bespoke relative increase and absolute PD thresholds based on product type and origination PD. Thresholds are subject to maximums defined by Group policy and typically apply minimum relative thresholds of 50-100% and a maximum relative threshold of 400%. For existing/historical exposures where origination point scores or data are no longer available or do not represent a comparable estimate of lifetime PD, a proxy origination score is defined, based upon: back-population of the approved lifetime PD score either to origination date or, where this is not feasible, as far back as possible (subject to a data start point no later than 1 January 2015); or use of available historical account performance data and other customer information, to derive a comparable ‘proxy’ estimation of origination PD. Qualitative test This is relevant for accounts that meet the portfolio’s ‘high risk’ criteria and are subject to closer credit monitoring. High risk customers may not be in arrears but either through an event or an observed behaviour exhibit credit distress. The definition and assessment of high risk includes as wide a range of information as reasonably available, such as industry and Group-wide customer level data, including but not limited to bureau scores and high consumer indebtedness index, wherever possible or relevant. Whilst the high risk populations applied for IFRS 9 impairment purposes are aligned with risk management processes, they are also regularly reviewed and validated to ensure that they capture any incremental segments where there is evidence of credit deterioration. Backstop criteria This is relevant for accounts that are more than 30 calendar days past due. The 30 days past due criteria is a backstop rather than a primary driver of moving exposures into Stage 2. The criteria for determining a significant increase in credit risk for assets with bullet repayments follows the same principle as all other assets, i.e. quantitative, qualitative and backstop tests are all applied. Exposures will move back to Stage 1 once they no longer meet the criteria for a significant increase in credit risk. This means that, at a minimum all payments must be up-to-date, the PD deterioration test is no longer met, the account is no longer classified as high risk, and the customer has evidenced an ability to maintain future payments. Exposures are only removed from Stage 3 and re-assigned to Stage 2 once the original default trigger event no longer applies. Exposures being removed from Stage 3 must no longer qualify as credit impaired, and: a) the obligor will also have demonstrated consistently good payment behaviour over a 12-month period, by making all consecutive contractual payments due and, for forborne exposures, the relevant EBA defined probationary period has also been successfully completed or; b) (for non-forborne exposures) the performance conditions are defined and approved within an appropriately sanctioned restructure plan, including 12 months’ payment history have been met. Management overlays and other exceptions to model outputs are applied only if consistent with the objective of identifying significant increases in credit risk.
Description of how forward-looking information has been incorporated into determination of expected credit losses	Forward-looking information The measurement of ECL involves complexity and judgement, including estimation of PD, LGD, a range of unbiased future economic scenarios, estimation of expected lives (where contractual life is not appropriate), and estimation of EAD and assessing significant increases in credit risk. Credit losses are the expected cash shortfalls from what is contractually due over the expected life of the financial instrument, discounted at the original effective interest rate (EIR). ECLs are the unbiased probability-weighted credit losses determined by evaluating a range of possible outcomes and considering future economic conditions. The Group uses a five-scenario model to calculate ECL. An external consensus forecast is assembled from key sources, including HM Treasury (short and medium term forecasts), Bloomberg (based on median of economic forecasts) and the Urban Land Institute (for US House Prices), which forms the baseline scenario. In addition, two adverse scenarios (Downside 1 and Downside 2) and two favourable scenarios (Upside 1 and Upside 2) are derived, with associated probability weightings. The adverse scenarios are calibrated to a similar severity to internal stress tests, whilst also considering IFRS 9 specific sensitivities and non-linearity. Downside 2 is benchmarked to the Bank of England’s annual cyclical scenarios and to the most severe scenario from Moody’s inventory, but is not designed to be the same. The favourable scenarios are calibrated to be symmetric to the adverse scenarios, subject to a ceiling calibrated to relevant recent favourable benchmark scenarios. The scenarios include eight economic variables (GDP, unemployment, House Price Index (HPI) and base rates in both the UK and US markets) and expanded variables using statistical models based on historical correlations. The upside and downside shocks are designed to evolve over a five-year stress horizon, with all five scenarios converging to a steady state after approximately eight years. The methodology for estimating probability weights for each of the scenarios involves a comparison of the distribution of key historical UK and US macroeconomic variables against the forecast paths of the five scenarios. The methodology works such that the baseline (reflecting current consensus outlook) has the highest weight and the weights of adverse and favourable scenarios depend on the deviation from the baseline; the further from the baseline, the smaller the weight. A single set of five scenarios is used across all portfolios and all five weights are normalised to equate to 100%. The same scenarios and weights that are used in the estimation of expected credit losses are also used for the Group internal planning purposes. The impacts across the portfolios are different because of the sensitivities of each of the portfolios to specific macroeconomic variables, for example, mortgages are highly sensitive to house prices, and credit cards and unsecured consumer loans are highly sensitive to unemployment.
Information about entity's definitions of default	Definition of default, credit impaired assets, write-offs, and interest income recognition The definition of default for the purpose of determining ECLs, and for internal credit risk management purposes, has been aligned to the Regulatory Capital CRR Article 178 definition of default, to maintain a consistent approach with IFRS 9 and associated regulatory guidance. The Regulatory Capital CRR Article 178 definition of default considers indicators that the debtor is unlikely to pay, includes exposures in forbearance and is no later than when the exposure is more than 90 days past due or 180 days past due in the case of UK mortgages. When exposures are identified as credit impaired at the time when they are purchased or originated interest income is calculated on the carrying value net of the impairment allowance. An asset is considered credit impaired when one or more events occur that have a detrimental impact on the estimated future cash flows of the financial asset. This comprises assets defined as defaulted and other individually assessed exposures where imminent default or actual loss is identified. Uncollectable loans are written off against the related allowance for loan impairment on completion of the Group’s internal processes and when all reasonably expected recoverable amounts have been collected. Subsequent recoveries of amounts previously written off are credited to the income statement. The timing and extent of write-offs may involve some element of subjective judgement. Nevertheless, a write-off will often be prompted by a specific event, such as the inception of insolvency proceedings or other formal recovery action, which makes it possible to establish that some or the entire advance is beyond realistic prospect of recovery.
Description of basis of inputs and assumptions and estimation techniques used to determine whether financial asset is credit-impaired financial asset	Modelling techniques ECLs are calculated by multiplying three main components, being the PD, LGD and the EAD, discounted at the original EIR. The regulatory Basel Committee of Banking Supervisors (BCBS) ECL calculations are leveraged for IFRS 9 modelling but adjusted for key differences which include: BCBS requires 12 month through the economic cycle losses whereas IFRS 9 requires 12 months or lifetime point in time losses based on conditions at the reporting date and multiple forecasts of the future economic conditions over the expected lives; IFRS 9 models do not include certain conservative BCBS model floors and downturn assessments and require discounting to the reporting date at the original EIR rather than using the cost of capital to the date of default; Management adjustments are made to modelled output to account for situations where known or expected risk factors and information have not been considered in the modelling process, for example forecast economic scenarios for uncertain political events; and ECL is measured at the individual financial instrument level, however a collective approach where financial instruments with similar risk characteristics are grouped together, with apportionment to individual financial instruments, is used where effects can only be seen at a collective level, for example for forward-looking information. For the IFRS 9 impairment assessment, the Group’s risk models are used to determine the PD, LGD and EAD. For Stage 2 and 3, the Group applies lifetime PDs but uses 12 month PDs for Stage 1. The ECL drivers of PD, EAD and LGD are modelled at an account level which considers vintage, among other credit factors. Also, the assessment of significant increase in credit risk is based on the initial lifetime PD curve, which accounts for the different credit risk underwritten over time. Forbearance A financial asset is subject to forbearance when it is modified due to the credit distress of the borrower. A modification made to the terms of an asset due to forbearance will typically be assessed as a non-substantial modification that does not result in derecognition of the original loan, except in circumstances where debt is exchanged for equity. Both performing and non-performing forbearance assets are classified as Stage 3 except where it is established that the concession granted has not resulted in diminished financial obligation and that no other regulatory definition of default criteria have been triggered, in which case the asset is classified as Stage 2. The minimum probationary period for non-performing forbearance is 12 months and for performing forbearance, 24 months. Hence, a minimum of 36 months is required for non-performing forbearance to move out of a forborne state. No financial instrument in forbearance can transfer back to Stage 1 until all of the Stage 2 thresholds are no longer met and can only move out of Stage 3 when no longer credit impaired.
Financial assets written off during reporting period and still subject to enforcement activity, contractual amount outstanding	£ 1,246	£ 1,660
Retail Portfolios [member]
Disclosure of impairment loss and reversal of impairment loss [line items]
Impairment charges on loans and advances	3,116	1,696	£ 1,598
Wholesale Portfolios [member]
Disclosure of impairment loss and reversal of impairment loss [line items]
Impairment charges on loans and advances	£ 1,569	£ 208	£ 133

Credit impairment charges (Deta

Credit impairment charges (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of impairment loss and reversal of impairment loss [line items]
Loans and advances, impairment charges	£ 4,308	£ 1,957	£ 1,785
Provision for undrawn contractually committed facilities and guarantees provided	776	71	(125)
Loan impairment, impairment charges	5,084	2,028	1,660
Loans and advances, recoveries and reimbursements	(399)	(124)	(195)
Provision for undrawn contractually committed facilities and guarantees provided, recoveries and reimbursements	0	0	0
Loans impairment, recoveries and reimbursements	(399)	(124)	(195)
Impairment charges	5,237	2,036	1,663
Recoveries and reimbursements	(399)	(124)	(195)
Credit impairment charges	4,838	1,912	1,468
Gain on recovery of loans and advances previously written off	35
Loan commitments and financial guarantee contracts [member]
Disclosure of impairment loss and reversal of impairment loss [line items]
Loan impairment, impairment charges	776	71
Credit impairment charges	776	71	(125)
Financial guarantee contracts [member] | Third parties [Member]
Disclosure of impairment loss and reversal of impairment loss [line items]
Credit impairment charges	364
Loans and advances [member]
Disclosure of impairment loss and reversal of impairment loss [line items]
Credit impairment charges	4,685	1,904	1,465
Financial assets at fair value through other comprehensive income [member]
Disclosure of impairment loss and reversal of impairment loss [line items]
Impairment charges	2	1	4
Recoveries and reimbursements	0	0	0
Credit impairment charges	2	1	4
Cash collateral and settlement balances [member]
Disclosure of impairment loss and reversal of impairment loss [line items]
Impairment charges	2	1	(1)
Recoveries and reimbursements	0	0	0
Credit impairment charges	2	1	(1)
Financial assets at amortised cost [member] | Loans and advances [member]
Disclosure of impairment loss and reversal of impairment loss [line items]
Credit impairment charges	£ 3,909	£ 1,833	£ 1,590

Credit impairment charges - Mod

Credit impairment charges - Modification of financial assets (Narrative) (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Financial assets modified during the period
Amortised cost before modification	£ 4,275	£ 1,383
Net modification gain/(loss)	34	£ 22
Financial assets modified since initial recognition
Gross carrying amount at 31 December of financial assets for which loss allowance has changed to 12-month measurement during the period	£ 1,194

Operating expenses (Details)

Operating expenses (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Infrastructure costs
Property and equipment	£ 1,556	£ 1,409	£ 1,360
Depreciation and amortisation	1,539	1,487	1,252
Lease payments	34	41	329
Impairment of property, equipment and intangible assets	194	33	9
Total Infrastructure costs	3,323	2,970	2,950
Administration and general expenses
Consultancy, legal and professional fees	567	590	729
Marketing and advertising	330	425	495
UK Bank levy	299	226	269
Other administration and general expenses	1,117	1,059	964
Total administration and general expenses	2,313	2,300	2,457
Staff costs	8,097	8,315	8,629
Litigation and conduct	153	1,849	2,207
Operating expenses	£ 13,886	£ 15,434	£ 16,243

Tax - Tax Charge (Details)

Tax - Tax Charge (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current tax charge/(credit)
Current year	£ 1,255	£ 1,037	£ 689
Adjustments in respect of prior years	31	(45)	(214)
Total	1,286	992	475
Deferred tax charge/(credit)
Current year	(830)	86	442
Adjustments in respect of prior years	148	(75)	(6)
Total	(682)	11	436
Tax charge	£ 604	£ 1,003	£ 911

Tax - Reconciliation between th

Tax - Reconciliation between the actual tax charge and the corporate tax rate (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019		Dec. 31, 2018
9. Tax
Profit before tax	£ 3,065	£ 4,357	[1]	£ 3,494	[1]
Tax charge based on the standard UK corporation tax rate of 19% (2019: 19%; 2018: 19%)	582	828		664
Impact of profits/losses earned in territories with different statutory rates to the UK (weighted average tax rate is 25.1% (2019: 24.2%; 2018: 21.9%))	£ 188	£ 227		£ 100
Tax, percentage [abstract]
Tax charge based on the standard UK corporation tax rate of 19% (2019: 19%; 2018: 19%)	19.00%	19.00%		19.00%
Impact of profits/losses earned in territories with different statutory rates to the UK (weighted average tax rate is 25.1% (2019: 24.2%; 2018: 21.9%))	6.10%	5.20%		2.90%
Recurring items [abstract]
Adjustments in respect of prior years	£ 179	£ (120)		£ (220)
Non-creditable taxes including withholding taxes	109	150		156
Impact of UK bank levy being non-deductible	57	43		51
Non-deductible expenses	48	45		81
Tax adjustments in respect of share-based payments	26	(6)		17
Impact of Barclays Bank PLC's overseas branches being taxed both locally and in the UK	25	15		16
Banking surcharge and other items	6	57		104
Changes in recognition of deferred tax and effect of unrecognised tax losses	(123)	(82)		(104)
AT1 tax credit	(165)	(157)		(148)
Non-taxable gains and income	£ (208)	£ (260)		£ (245)
Recurring items, percentages [abstract]
Adjustments in respect of prior years, percentage	5.80%	(2.70%)		(6.30%)
Non-creditable taxes including withholding taxes, percentage	3.50%	3.40%		4.50%
Impact of UK bank levy being non-deductible, percentage	1.90%	1.00%		1.50%
Non-deductible expenses, percentage	1.60%	1.00%		2.30%
Tax adjustments in respect of share-based payments, percentage	0.80%	(0.10%)		0.50%
Impact of Barclays Bank PLC's overseas branches being taxed both locally and in the UK, percentage	0.80%	0.30%		0.50%
Banking surcharge and other items, percentage	0.20%	1.30%		2.90%
Changes in recognition of deferred tax and effect of unrecognised tax losses, percentage	(4.00%)	(1.90%)		(3.00%)
AT1 tax credit, percentage	(5.40%)	(3.60%)		(4.30%)
Non-taxable gains and income, percentage	(6.80%)	(6.00%)		(7.00%)
Non-recurring items [abstract]
Remeasurement of UK deferred tax assets	£ (118)	£ 0		£ 0
Non-deductible provisions for UK customer redress	(7)	263		93
Non-deductible provisions for investigations and litigation	£ 5	£ 0		£ 346
Non-recurring items, percentages [abstract]
Remeasurement of UK deferred tax assets due to tax rate reduction, percentage	(3.80%)	0.00%		0.00%
Non-deductible provisions for UK customer redress, percentage	(0.20%)	6.10%		2.70%
Non-deductible provisions for investigations and litigation, percentage	0.20%	0.00%		9.90%
Tax charge	£ 604	£ 1,003		£ 911
Total tax charge, percentage	19.70%	23.00%		26.10%
[1]	2019 and 2018 comparative figures have been restated to make the cash flow statement more relevant following a review of the disclosure and the accounting policies applied. Amendments have been made to the classification of cash collateral reported within cash and cash equivalents and to the presentation of items within net cash flows from operating and investing activities. Footnotes b and c below quantify the impact of the changes to the respective cash flow categories in prior periods and provide further detail .

Tax - Reconciliation between _2

Tax - Reconciliation between the actual tax charge and the corporate tax rate (Parenthetical) (Details)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of geographical areas [line items]
Tax charge based on the standard UK corporation tax rate	19.00%	19.00%	19.00%
Impact of profits/losses earned in territories with different statutory rates	6.10%	5.20%	2.90%
Weighted average [member]
Disclosure of geographical areas [line items]
Impact of profits/losses earned in territories with different statutory rates	25.10%	24.20%	21.90%

Tax - Deferred tax assets and l

Tax - Deferred tax assets and liabilities (Details) - GBP (£) £ in Millions	Dec. 31, 2020	Dec. 31, 2019
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred tax asset	£ 3,444	£ 3,290
Deferred tax liability	(15)	(23)
Net deferred tax	3,429	3,267
Intermediate Holding Company - IHC Tax Group [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred tax asset	1,001	1,037
US Branch Tax group [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred tax asset	1,048	1,015
UK Tax group [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred tax asset	886	818
Other [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred tax asset	£ 509	£ 420

Tax - Movements on deferred tax

Tax - Movements on deferred tax assets and liabilities during the year before offsetting (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Assets	£ 4,449	£ 4,535
Liabilities	(1,182)	(758)
Net deferred tax (liability) asset	3,267	3,267	£ 3,777
At 1 January	3,267	3,777
Income statement	682	(11)	(436)
Other comprehensive income and reserves	(462)	(414)
Other movements	(58)	(85)
At 31 December	3,429	3,267	3,777
Assets	4,979	4,449	4,535
Liabilities	(1,550)	(1,182)	(758)
Net deferred tax (liability) asset	3,267	3,267	3,777
Share-based payments and deferred compensation [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Assets	344	359
Liabilities	0	0
Net deferred tax (liability) asset	344	344	359
At 1 January	344	359
Income statement	20	(19)
Other comprehensive income and reserves	5	9
Other movements	(6)	(5)
At 31 December	363	344	359
Assets	363	344	359
Liabilities	0	0	0
Net deferred tax (liability) asset	344	344	359
Other provisions [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Assets	128	112
Liabilities	0	0
Net deferred tax (liability) asset	128	128	112
At 1 January	128	112
Income statement	22	23
Other comprehensive income and reserves	0	2
Other movements	(7)	(9)
At 31 December	143	128	112
Assets	143	128	112
Liabilities	0	0	0
Net deferred tax (liability) asset	128	128	112
Retirement benefit obligation [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Assets	38	46
Liabilities	(640)	(435)
Net deferred tax (liability) asset	(602)	(602)	(389)
At 1 January	(602)	(389)
Income statement	6	(4)
Other comprehensive income and reserves	(191)	(205)
Other movements	4	(4)
At 31 December	(783)	(602)	(389)
Assets	43	38	46
Liabilities	(826)	(640)	(435)
Net deferred tax (liability) asset	(602)	(602)	(389)
Cash flow hedges [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Assets	0	39
Liabilities	(181)	(10)
Net deferred tax (liability) asset	(566)	29	29
At 1 January	(181)	29
Income statement	0	0
Other comprehensive income and reserves	(377)	(210)
Other movements	(8)	0
At 31 December	(566)	(181)	29
Assets	0	0	39
Liabilities	(566)	(181)	(10)
Net deferred tax (liability) asset	(566)	29	29
Financial assets at fair value through other comprehensive income, category [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Assets	119	180
Liabilities	(18)	(35)
Net deferred tax (liability) asset	(38)	145	145
At 1 January	101	145
Income statement	0	0
Other comprehensive income and reserves	(137)	(42)
Other movements	(2)	(2)
At 31 December	(38)	101	145
Assets	0	119	180
Liabilities	(38)	(18)	(35)
Net deferred tax (liability) asset	(38)	145	145
Fixed asset timing differences [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Assets	1,338	1,292
Liabilities	(31)	(16)
Net deferred tax (liability) asset	1,424	1,307	1,276
At 1 January	1,307	1,276
Income statement	129	51
Other comprehensive income and reserves	0	0
Other movements	(12)	(20)
At 31 December	1,424	1,307	1,276
Assets	1,465	1,338	1,292
Liabilities	(41)	(31)	(16)
Net deferred tax (liability) asset	1,424	1,307	1,276
Loan impairment allowance [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Assets	501	601
Liabilities	0	0
Net deferred tax (liability) asset	501	601	601
At 1 January	501	601
Income statement	156	(49)
Other comprehensive income and reserves	0	(40)
Other movements	9	(11)
At 31 December	666	501	601
Assets	666	501	601
Liabilities	0	0	0
Net deferred tax (liability) asset	501	601	601
Tax losses carried forward [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Assets	523	529
Liabilities	0	0
Net deferred tax (liability) asset	523	523	529
At 1 January	523	529
Income statement	215	18
Other comprehensive income and reserves	0	0
Other movements	(3)	(24)
At 31 December	735	523	529
Assets	735	523	529
Liabilities	0	0	0
Net deferred tax (liability) asset	523	523	529
Other [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Assets	1,458	1,377
Liabilities	(312)	(262)
Net deferred tax (liability) asset	1,485	1,115	1,115
At 1 January	1,146	1,115
Income statement	134	(31)
Other comprehensive income and reserves	238	72
Other movements	(33)	(10)
At 31 December	1,485	1,146	1,115
Assets	1,564	1,458	1,377
Liabilities	(79)	(312)	(262)
Net deferred tax (liability) asset	£ 1,485	£ 1,115	£ 1,115

Tax (Narrative) (Details)

Tax (Narrative) (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Average effective tax rate	19.70%	23.00%	26.10%
Applicable tax rate	19.00%	19.00%	19.00%
Income tax relating to other individually immaterial components of other comprehensive income	£ 5	£ 16
Deferred tax assets	3,444	3,290
Deferred tax liabilities	15	23
Unused tax credits for which no deferred tax asset recognised	236	247
Temporary differences associated with investments in subsidiaries, branches and associates and interests in joint arrangements for which deferred tax liabilities have not been recognised	800	700
Intermediate Holding Company - IHC Tax Group [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred tax assets	1,001	1,037
US Branch Tax group [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred tax assets	1,048	1,015
UK Tax group [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred tax assets	886	818
Other [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred tax assets	509	420
After more than 12 months [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred tax assets	4,544	3,945
Deferred tax liabilities	1,510	1,199
Within five years [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Unused tax credits for which no deferred tax asset recognised	139	41
Within six to ten years [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Unused tax credits for which no deferred tax asset recognised	236	239
Within eleven to twenty years [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Unused tax credits for which no deferred tax asset recognised	7,271	5,178
Indefinitely [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Unused tax credits for which no deferred tax asset recognised	13,267	14,124
Temporary differences [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deductible temporary differences for which no deferred tax asset is recognised	125	213
Unused tax losses [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deductible temporary differences for which no deferred tax asset is recognised	20,913	19,582
Unused tax losses [member] | Intermediate Holding Company - IHC Tax Group [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred tax assets		54
Unused tax losses [member] | US Branch Tax group [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred tax assets		84
Unused tax losses [member] | UK Tax group [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred tax assets	565	268
Unused tax losses [member] | Other [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred tax assets	170	117
Capital losses [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Unused tax losses for which no deferred tax asset recognised	3,947	3,980
Loss in current or prior year [member] | Intermediate Holding Company - IHC Tax Group [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred tax assets	£ 330	359
Description of expiry date of deductible temporary differences, unused tax losses and unused tax credits	2034
Loss in current or prior year [member] | Other [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred tax assets	£ 8	£ 10

Earnings per share (Details)

Earnings per share (Details) - GBP (£) £ / shares in Units, £ in Millions, shares in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
10. Earnings per share
Profit attributable to ordinary equity holders of parent	£ 1,526	£ 2,461	£ 1,597
Basic weighted average number of shares in issue	17,300	17,200	17,075
Number of potential ordinary shares	368	282	308
Diluted weighted average number of shares	17,668	17,482	17,383
Basic earnings per ordinary share	£ 0.088	£ 0.143	£ 0.094
Diluted earnings per share	£ 0.086	£ 0.141	£ 0.092

Earnings per share (Narrative)

Earnings per share (Narrative) (Details) - £ / shares shares in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of terms and conditions of share-based payment arrangement [line items]
Number of potential ordinary shares	368	282	308
Weighted average number of ordinary shares outstanding	17,300	17,200	17,075
Min [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Strike price	£ 0.84
Max [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Strike price	£ 2.27
Anti-dilutive [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Weighted average number of ordinary shares outstanding	69	43
Employee share schemes [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Number of potential ordinary shares	719	533
Employee share schemes [member] | Weighted average [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Increase (decrease) in number of shares outstanding	100	125

Dividends on ordinary shares (N

Dividends on ordinary shares (Narrative) (Details) - GBP (£) £ / shares in Units, £ in Millions, shares in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	[1]	Dec. 31, 2018	[1]
Repurchase of shares		£ 1,056	£ 2,668		£ 3,582
Intention to initiate
Repurchase of shares	£ 700
Ordinary share capital
Dividends approved, per share		£ 0.01
Par value per share		£ 0.25
Ordinary shares in issue		17,359
Ordinary share capital | Full year dividend payment
Dividends approved, per share		£ 0.01
[1]	2019 and 2018 comparative figures have been restated to make the cash flow statement more relevant following a review of the disclosure and the accounting policies applied. Amendments have been made to the classification of cash collateral reported within cash and cash equivalents and to the presentation of items within net cash flows from operating and investing activities. Footnotes b and c below quantify the impact of the changes to the respective cash flow categories in prior periods and provide further detail .

Trading portfolio (Details)

Trading portfolio (Details) - GBP (£) £ in Millions	Dec. 31, 2020	Dec. 31, 2019
Disclosure of detailed information about financial instruments [line items]
Trading portfolio assets	£ 127,950	£ 114,195
Trading portfolio liabilities	(47,405)	(36,916)
Debt securities and other eligible bills [member]
Disclosure of detailed information about financial instruments [line items]
Trading portfolio assets	56,482	52,739
Trading portfolio liabilities	(30,102)	(23,741)
Equity securities [member]
Disclosure of detailed information about financial instruments [line items]
Trading portfolio assets	62,192	56,000
Trading portfolio liabilities	(17,303)	(13,175)
Traded loans [member]
Disclosure of detailed information about financial instruments [line items]
Trading portfolio assets	8,348	5,378
Trading portfolio liabilities	0	0
Commodities [Member]
Disclosure of detailed information about financial instruments [line items]
Trading portfolio assets	928	78
Trading portfolio liabilities	£ 0	£ 0

Financial assets at fair valu_5

Financial assets at fair value through the income statement (Details) - GBP (£) £ in Millions	Dec. 31, 2020	Dec. 31, 2019
Disclosure of financial assets [line items]
Loans and advances	£ 342,632	£ 339,115
Reverse repurchase agreements	9,031	3,379
Other financial assets	850	1,375
Financial assets at fair value through the income statement	175,151	133,086
Financial assets at fair value through the income statement [member]
Disclosure of financial assets [line items]
Loans and advances	30,879	22,692
Debt securities	1,693	5,249
Equity securities	4,620	7,495
Reverse repurchase agreements	137,616	96,887
Other financial assets	343	763
Financial assets designated at fair value [member]
Disclosure of financial assets [line items]
Loans and advances	5,600	4,900
Debt securities	292	3,995
Equity securities	0	0
Reverse repurchase agreements	19	40
Other financial assets	0	0
Financial assets at fair value through the income statement	5,911	8,935
Financial assets mandatorily at fair value [member]
Disclosure of financial assets [line items]
Loans and advances	25,279	17,792
Debt securities	1,401	1,254
Equity securities	4,620	7,495
Reverse repurchase agreements	137,597	96,847
Other financial assets	343	763
Financial assets at fair value through the income statement	£ 169,240	£ 124,151

Financial assets at fair valu_6

Financial assets at fair value through the income statement - Credit risk of loans and advances designated at fair value and related credit derivatives (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Credit risk [member] | Derivatives [member]
Disclosure of financial assets [line items]
Value mitigated by related credit derivatives	£ 795	£ 0
Changes in fair value during the year ended	3	0
Cumulative changes in fair value from inception	3	0
Loans and advances [member]
Disclosure of financial assets [line items]
Loans and advances designated at fair value, attributable to credit risk	5,600	4,900
Changes in fair value during the year ended	(47)	4
Cumulative changes in fair value from inception	£ (73)	£ (26)

Derivative financial instrume_3

Derivative financial instruments - Total Derivatives (Details) - GBP (£) £ in Millions	Dec. 31, 2020	Dec. 31, 2019
Disclosure of risk management strategy related to hedge accounting [line items]
Derivative assets	£ 302,446	£ 229,236
Derivative liabilities	(300,775)	(229,204)
Derivatives [member]
Disclosure of risk management strategy related to hedge accounting [line items]
Notional amount	43,359,755	42,292,485
Derivative assets held for trading		229,063
Derivative liabilities held for trading		(228,617)
At fair value [member]
Disclosure of risk management strategy related to hedge accounting [line items]
Derivative assets held for trading		229,063
Derivative assets held for held for risk management	566	173
Derivative assets	302,446	229,236
Derivative liabilities held for trading		(228,617)
Derivative liabilities held for risk management	(980)	(587)
Derivative liabilities	(300,775)	(229,204)
Held for risk management [Member] | Derivatives [member]
Disclosure of risk management strategy related to hedge accounting [line items]
Notional amount	189,784	181,375
Held for risk management [Member] | At fair value [member]
Disclosure of risk management strategy related to hedge accounting [line items]
Derivative assets held for held for risk management	566	173
Derivative liabilities held for risk management	(980)	(587)
Held for trading [member] | Derivatives [member]
Disclosure of risk management strategy related to hedge accounting [line items]
Notional amount	43,169,971	42,111,110
Derivative assets held for trading	173	566
Derivative liabilities held for trading	(587)	(980)
Held for trading [member] | At fair value [member]
Disclosure of risk management strategy related to hedge accounting [line items]
Derivative assets held for trading	301,880	229,063
Derivative liabilities held for trading	£ (299,795)	£ (228,617)

Derivative financial instrume_4

Derivative financial instruments - Derivatives held for trading (Details) - GBP (£) £ in Millions	Dec. 31, 2020	Dec. 31, 2019
At fair value [member]
Disclosure of detailed information about financial instruments [line items]
Derivative assets held for trading		£ 229,063
Derivative liabilities held for trading		(228,617)
Derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount	£ 43,359,755	42,292,485
Derivative assets held for trading		229,063
Derivative liabilities held for trading		(228,617)
Held for trading [member] | At fair value [member]
Disclosure of detailed information about financial instruments [line items]
Derivative assets held for trading	301,880	229,063
Derivative liabilities held for trading	(299,795)	(228,617)
Held for trading [member] | At fair value [member] | OTC derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Derivative assets held for trading	277,779	212,871
Derivative liabilities held for trading	(275,313)	(211,686)
Held for trading [member] | At fair value [member] | Cleared by central counterparty [member]
Disclosure of detailed information about financial instruments [line items]
Derivative assets held for trading	2,231	3,913
Derivative liabilities held for trading	(2,315)	(3,925)
Held for trading [member] | At fair value [member] | Exchange traded derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Derivative assets held for trading	21,870	12,279
Derivative liabilities held for trading	(22,167)	(13,006)
Held for trading [member] | Derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount	43,169,971	42,111,110
Derivative assets held for trading	173	566
Derivative liabilities held for trading	(587)	(980)
Held for trading [member] | Derivatives [member] | OTC derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount	19,864,342	18,173,218
Derivative assets held for trading	173	566
Derivative liabilities held for trading	587	980
Held for trading [member] | Derivatives [member] | Cleared by central counterparty [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount	19,279,306	17,929,288
Held for trading [member] | Derivatives [member] | Exchange traded derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount	4,026,323	6,008,604
Held for trading [member] | Foreign exchange derivatives [member] | At fair value [member]
Disclosure of detailed information about financial instruments [line items]
Derivative assets held for trading	84,739	56,576
Derivative liabilities held for trading	(84,381)	(57,021)
Held for trading [member] | Foreign exchange derivatives [member] | At fair value [member] | OTC derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Derivative assets held for trading	84,401	56,480
Derivative liabilities held for trading	(84,043)	(56,845)
Held for trading [member] | Foreign exchange derivatives [member] | At fair value [member] | Cleared by central counterparty [member]
Disclosure of detailed information about financial instruments [line items]
Derivative assets held for trading	335	84
Derivative liabilities held for trading	(335)	(145)
Held for trading [member] | Foreign exchange derivatives [member] | At fair value [member] | Exchange traded derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Derivative assets held for trading	3	12
Derivative liabilities held for trading	(3)	(31)
Held for trading [member] | Foreign exchange derivatives [member] | Derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount	5,554,037	4,999,865
Held for trading [member] | Foreign exchange derivatives [member] | Derivatives [member] | OTC derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount	5,461,057	4,906,647
Held for trading [member] | Foreign exchange derivatives [member] | Derivatives [member] | Cleared by central counterparty [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount	78,946	74,698
Held for trading [member] | Foreign exchange derivatives [member] | Derivatives [member] | Exchange traded derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount	14,034	18,520
Held for trading [member] | Interest rate derivatives [member] | At fair value [member]
Disclosure of detailed information about financial instruments [line items]
Derivative assets held for trading	172,144	142,325
Derivative liabilities held for trading	(162,402)	(135,759)
Held for trading [member] | Interest rate derivatives [member] | At fair value [member] | OTC derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Derivative assets held for trading	170,808	140,207
Derivative liabilities held for trading	(161,157)	(133,401)
Held for trading [member] | Interest rate derivatives [member] | At fair value [member] | Cleared by central counterparty [member]
Disclosure of detailed information about financial instruments [line items]
Derivative assets held for trading	965	867
Derivative liabilities held for trading	(885)	(1,093)
Held for trading [member] | Interest rate derivatives [member] | At fair value [member] | Exchange traded derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Derivative assets held for trading	371	1,251
Derivative liabilities held for trading	(360)	(1,265)
Held for trading [member] | Interest rate derivatives [member] | Derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount	35,257,371	35,098,216
Held for trading [member] | Interest rate derivatives [member] | Derivatives [member] | OTC derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount	13,547,990	12,627,808
Held for trading [member] | Interest rate derivatives [member] | Derivatives [member] | Cleared by central counterparty [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount	18,737,415	17,428,460
Held for trading [member] | Interest rate derivatives [member] | Derivatives [member] | Exchange traded derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount	2,971,966	5,041,948
Held for trading [member] | Credit derivatives [member] | At fair value [member]
Disclosure of detailed information about financial instruments [line items]
Derivative assets held for trading	4,605	8,215
Derivative liabilities held for trading	(5,004)	(8,086)
Held for trading [member] | Credit derivatives [member] | At fair value [member] | OTC derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Derivative assets held for trading	3,674	5,253
Derivative liabilities held for trading	(3,909)	(5,399)
Held for trading [member] | Credit derivatives [member] | At fair value [member] | Cleared by central counterparty [member]
Disclosure of detailed information about financial instruments [line items]
Derivative assets held for trading	931	2,962
Derivative liabilities held for trading	(1,095)	(2,687)
Held for trading [member] | Credit derivatives [member] | Derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount	847,845	825,516
Held for trading [member] | Credit derivatives [member] | Derivatives [member] | OTC derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount	384,900	399,386
Held for trading [member] | Credit derivatives [member] | Derivatives [member] | Cleared by central counterparty [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount	462,945	426,130
Held for trading [member] | Equity and stock index derivatives [member] | At fair value [member]
Disclosure of detailed information about financial instruments [line items]
Derivative assets held for trading	38,972	20,806
Derivative liabilities held for trading	(46,615)	(26,634)
Held for trading [member] | Equity and stock index derivatives [member] | At fair value [member] | OTC derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Derivative assets held for trading	18,807	10,628
Derivative liabilities held for trading	(26,094)	(15,785)
Held for trading [member] | Equity and stock index derivatives [member] | At fair value [member] | Exchange traded derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Derivative assets held for trading	20,165	10,178
Derivative liabilities held for trading	(20,521)	(10,849)
Held for trading [member] | Equity and stock index derivatives [member] | Derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount	1,393,265	1,074,044
Held for trading [member] | Equity and stock index derivatives [member] | Derivatives [member] | OTC derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount	466,151	232,050
Held for trading [member] | Equity and stock index derivatives [member] | Derivatives [member] | Exchange traded derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount	927,114	841,994
Held for trading [member] | Commodity derivatives [member] | At fair value [member]
Disclosure of detailed information about financial instruments [line items]
Derivative assets held for trading	1,420	1,141
Derivative liabilities held for trading	(1,393)	(1,117)
Held for trading [member] | Commodity derivatives [member] | At fair value [member] | OTC derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Derivative assets held for trading	89	303
Derivative liabilities held for trading	(110)	(256)
Held for trading [member] | Commodity derivatives [member] | At fair value [member] | Exchange traded derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Derivative assets held for trading	1,331	838
Derivative liabilities held for trading	(1,283)	(861)
Held for trading [member] | Commodity derivatives [member] | Derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount	117,453	113,469
Held for trading [member] | Commodity derivatives [member] | Derivatives [member] | OTC derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount	4,244	7,327
Held for trading [member] | Commodity derivatives [member] | Derivatives [member] | Exchange traded derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount	£ 113,209	£ 106,142

Derivative financial instrume_5

Derivative financial instruments - Derivatives held for risk management (Details) - GBP (£) £ in Millions	Dec. 31, 2020	Dec. 31, 2019
At fair value [member]
Disclosure of detailed information about financial instruments [line items]
Derivative assets held for held for risk management	£ 566	£ 173
Derivative liabilities held for risk management	(980)	(587)
Derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount	43,359,755	42,292,485
Held for risk management [Member] | At fair value [member]
Disclosure of detailed information about financial instruments [line items]
Derivative assets held for held for risk management	566	173
Derivative liabilities held for risk management	(980)	(587)
Held for risk management [Member] | At fair value [member] | OTC derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Derivative assets held for held for risk management	566	173
Derivative liabilities held for risk management	(980)	(587)
Held for risk management [Member] | At fair value [member] | Cleared by central counterparty [member]
Disclosure of detailed information about financial instruments [line items]
Derivative assets held for held for risk management	0	0
Derivative liabilities held for risk management	0	0
Held for risk management [Member] | Derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount	189,784	181,375
Held for risk management [Member] | Derivatives [member] | OTC derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount	20,936	10,719
Held for risk management [Member] | Derivatives [member] | Cleared by central counterparty [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount	168,848	170,656
Held for risk management [Member] | Cash flow hedges [member] | At fair value [member]
Disclosure of detailed information about financial instruments [line items]
Derivative assets held for held for risk management	386	7
Derivative liabilities held for risk management	0	(1)
Held for risk management [Member] | Cash flow hedges [member] | At fair value [member] | OTC derivatives [member] | Interest rate derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Derivative assets held for held for risk management	35	7
Derivative liabilities held for risk management	0	(1)
Held for risk management [Member] | Cash flow hedges [member] | At fair value [member] | OTC derivatives [member] | Foreign exchange risk [member]
Disclosure of detailed information about financial instruments [line items]
Derivative assets held for held for risk management	351	0
Derivative liabilities held for risk management	0	0
Held for risk management [Member] | Cash flow hedges [member] | At fair value [member] | Cleared by central counterparty [member] | Interest rate derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Derivative assets held for held for risk management	0	0
Derivative liabilities held for risk management	0	0
Held for risk management [Member] | Cash flow hedges [member] | Derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount	74,437	67,773
Held for risk management [Member] | Cash flow hedges [member] | Derivatives [member] | OTC derivatives [member] | Interest rate derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount	2,433	1,195
Held for risk management [Member] | Cash flow hedges [member] | Derivatives [member] | OTC derivatives [member] | Foreign exchange risk [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount	6,596	0
Held for risk management [Member] | Cash flow hedges [member] | Derivatives [member] | Cleared by central counterparty [member] | Interest rate derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount	65,408	66,578
Held for risk management [Member] | Fair value hedges [member] | At fair value [member]
Disclosure of detailed information about financial instruments [line items]
Derivative assets held for held for risk management	155	136
Derivative liabilities held for risk management	(980)	(586)
Held for risk management [Member] | Fair value hedges [member] | At fair value [member] | OTC derivatives [member] | Interest rate derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Derivative assets held for held for risk management	155	136
Derivative liabilities held for risk management	(980)	(586)
Held for risk management [Member] | Fair value hedges [member] | At fair value [member] | Cleared by central counterparty [member] | Interest rate derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Derivative assets held for held for risk management	0	0
Derivative liabilities held for risk management	0	0
Held for risk management [Member] | Fair value hedges [member] | Derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount	114,556	112,457
Held for risk management [Member] | Fair value hedges [member] | Derivatives [member] | OTC derivatives [member] | Interest rate derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount	11,116	8,379
Held for risk management [Member] | Fair value hedges [member] | Derivatives [member] | Cleared by central counterparty [member] | Interest rate derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount	103,440	104,078
Held for risk management [Member] | Hedges of net investment in foreign operations [member] | At fair value [member]
Disclosure of detailed information about financial instruments [line items]
Derivative assets held for held for risk management	566	173
Derivative liabilities held for risk management	(980)	(587)
Held for risk management [Member] | Hedges of net investment in foreign operations [member] | At fair value [member] | OTC derivatives [member] | Foreign exchange risk [member]
Disclosure of detailed information about financial instruments [line items]
Derivative assets held for held for risk management	25	30
Derivative liabilities held for risk management	0	0
Held for risk management [Member] | Hedges of net investment in foreign operations [member] | Derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount	791	1,145
Derivative assets held for held for risk management	25	30
Derivative liabilities held for risk management	0	0
Held for risk management [Member] | Hedges of net investment in foreign operations [member] | Derivatives [member] | OTC derivatives [member] | Foreign exchange risk [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount	£ 791	£ 1,145

Derivative financial instrume_6

Derivative financial instruments - The significant hedge accounting exposures impacted by the IBOR reform (Details) - IBOR reform [member] £ in Millions	12 Months Ended
	Dec. 31, 2020GBP (£)
Disclosure of risk management strategy related to hedge accounting [line items]
Nominal amount of hedged items directly impacted by IBOR reform	£ 51,540
Nominal amount of hedging instruments directly impacted by IBOR reform	49,754
GBP
Disclosure of risk management strategy related to hedge accounting [line items]
Rate	GBP London Interbank Offered rate (LIBOR)
Nominal amount of hedged items directly impacted by IBOR reform	£ 15,740
Nominal amount of hedging instruments directly impacted by IBOR reform	14,276
GBP | Expected convergence to RFR
Disclosure of risk management strategy related to hedge accounting [line items]
Rate	Reformed Sterling Overnight Index Average (SONIA)
USD
Disclosure of risk management strategy related to hedge accounting [line items]
Rate	USD LIBOR
Nominal amount of hedged items directly impacted by IBOR reform	£ 29,154
Nominal amount of hedging instruments directly impacted by IBOR reform	28,832
USD | Expected convergence to RFR
Disclosure of risk management strategy related to hedge accounting [line items]
Rate	Secured Overnight Financing Rate (SOFR)
EUR
Disclosure of risk management strategy related to hedge accounting [line items]
Rate	Euro Overnight Index Average (EONIA)
Nominal amount of hedged items directly impacted by IBOR reform	£ 5,128
Nominal amount of hedging instruments directly impacted by IBOR reform	5,128
EUR | Expected convergence to RFR
Disclosure of risk management strategy related to hedge accounting [line items]
Rate	Euro Short-Term Rate (€STR)
JPY
Disclosure of risk management strategy related to hedge accounting [line items]
Rate	JPY LIBOR
Nominal amount of hedged items directly impacted by IBOR reform	£ 1,262
Nominal amount of hedging instruments directly impacted by IBOR reform	1,262
JPY | Expected convergence to RFR
Disclosure of risk management strategy related to hedge accounting [line items]
Rate	Tokyo Overnight Average (TONA)
CHF
Disclosure of risk management strategy related to hedge accounting [line items]
Rate	CHF LIBOR
Nominal amount of hedged items directly impacted by IBOR reform	£ 145
Nominal amount of hedging instruments directly impacted by IBOR reform	145
CHF | Expected convergence to RFR
Disclosure of risk management strategy related to hedge accounting [line items]
Rate	Swiss Average Rate Overnight (SARON)
Other [member]
Disclosure of risk management strategy related to hedge accounting [line items]
Rate	All Other IBORs
Nominal amount of hedged items directly impacted by IBOR reform	£ 111
Nominal amount of hedging instruments directly impacted by IBOR reform	111
Other [member] | Expected convergence to RFR
Disclosure of risk management strategy related to hedge accounting [line items]
Rate	Various Other RFRs

Derivative financial instrume_7

Derivative financial instruments - Hedged items in fair value hedges (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Liabilities
Line item in the income statement used to recognised ineffectiveness	Hedge ineffectiveness is recognised in net interest income.	Hedge ineffectiveness is recognised in net interest income.
Fair value hedges [member]
Assets
Carrying amount, hedged assets	£ 68,279	£ 54,179
Accumulated fair value hedge adjustment included in carrying amount	4,265	1,986
Of which: Accumulated fair value adjustment on items no longer in a hedge relationship	(296)	(149)
Liabilities
Carrying amount, hedged liabilities	(50,438)	(55,589)
Accumulated fair value hedge adjustment included in carrying amount	(2,859)	(1,574)
Of which: Accumulated fair value adjustment on items no longer in a hedge relationship	(24)	(75)
Total Hedged Items	17,841	(1,410)
Accumulated fair value hedge adjustment included in carrying amount, total	1,406	412
Of which: Accumulated fair value adjustment on items no longer in a hedge relationship, total	(320)	(224)
Change in fair value used as a basis to determine hedge ineffectiveness	1,745	1,698
Hedge ineffectiveness recognised in the income statement	£ 42	£ 45
Line item in the income statement used to recognised ineffectiveness	Hedge ineffectiveness is recognised in net interest income	Hedge ineffectiveness is recognised in net interest income
Fair value hedges [member] | Financial assets at fair value through other comprehensive income [member] | Interest rate risk [member]
Assets
Carrying amount, hedged assets	£ 41,544	£ 32,169
Accumulated fair value hedge adjustment included in carrying amount	1,284
Of which: Accumulated fair value adjustment on items no longer in a hedge relationship	351
Fair value hedges [member] | Financial assets at fair value through other comprehensive income [member] | Inflation risk [member]
Assets
Carrying amount, hedged assets	10,821	7,811
Accumulated fair value hedge adjustment included in carrying amount	367
Of which: Accumulated fair value adjustment on items no longer in a hedge relationship	(9)
Hedged assets [member] | Fair value hedges [member]
Liabilities
Change in fair value used as a basis to determine hedge ineffectiveness	3,211	3,143
Hedge ineffectiveness recognised in the income statement	98	58
Hedged assets [member] | Fair value hedges [member] | Debt securities [member] | Interest rate risk [member]
Assets
Carrying amount, hedged assets	1,440	2,974
Accumulated fair value hedge adjustment included in carrying amount	23	(1)
Of which: Accumulated fair value adjustment on items no longer in a hedge relationship	0	0
Liabilities
Change in fair value used as a basis to determine hedge ineffectiveness	18	(1)
Hedge ineffectiveness recognised in the income statement	(7)	0
Hedged assets [member] | Fair value hedges [member] | Debt securities [member] | Inflation risk [member]
Assets
Carrying amount, hedged assets	4,071	2,258
Accumulated fair value hedge adjustment included in carrying amount	(43)	(41)
Of which: Accumulated fair value adjustment on items no longer in a hedge relationship	0	0
Liabilities
Change in fair value used as a basis to determine hedge ineffectiveness	453	(41)
Hedge ineffectiveness recognised in the income statement	3	1
Hedged assets [member] | Fair value hedges [member] | Financial assets at fair value through other comprehensive income [member] | Interest rate risk [member]
Assets
Carrying amount, hedged assets	41,544	32,169
Accumulated fair value hedge adjustment included in carrying amount	1,284	922
Of which: Accumulated fair value adjustment on items no longer in a hedge relationship	351	494
Liabilities
Change in fair value used as a basis to determine hedge ineffectiveness	825	2,046
Hedge ineffectiveness recognised in the income statement	(13)	(4)
Hedged assets [member] | Fair value hedges [member] | Financial assets at fair value through other comprehensive income [member] | Inflation risk [member]
Assets
Carrying amount, hedged assets	10,821	7,811
Accumulated fair value hedge adjustment included in carrying amount	367	87
Of which: Accumulated fair value adjustment on items no longer in a hedge relationship	(9)	0
Liabilities
Change in fair value used as a basis to determine hedge ineffectiveness	307	111
Hedge ineffectiveness recognised in the income statement	1	(16)
Loans and advances [member] | Fair value hedges [member] | Financial assets at amortised cost [member] | Interest rate risk [member]
Assets
Carrying amount, hedged assets	9,858	8,442
Accumulated fair value hedge adjustment included in carrying amount	2,289	694
Of which: Accumulated fair value adjustment on items no longer in a hedge relationship	(638)	(643)
Liabilities
Change in fair value used as a basis to determine hedge ineffectiveness	1,583	1,030
Hedge ineffectiveness recognised in the income statement	111	76
Loans and advances [member] | Fair value hedges [member] | Financial assets at amortised cost [member] | Inflation risk [member]
Assets
Carrying amount, hedged assets	545	525
Accumulated fair value hedge adjustment included in carrying amount	345	325
Of which: Accumulated fair value adjustment on items no longer in a hedge relationship	0	0
Liabilities
Change in fair value used as a basis to determine hedge ineffectiveness	25	(2)
Hedge ineffectiveness recognised in the income statement	3	1
Hedged liabilities [member] | Fair value hedges [member]
Liabilities
Change in fair value used as a basis to determine hedge ineffectiveness	(1,466)	(1,445)
Hedge ineffectiveness recognised in the income statement	(56)	(13)
Debt securities [member] | Fair value hedges [member] | Interest rate risk [member]
Liabilities
Carrying amount, hedged liabilities	(50,438)	(55,589)
Accumulated fair value hedge adjustment included in carrying amount	(2,859)	(1,574)
Of which: Accumulated fair value adjustment on items no longer in a hedge relationship	(24)	(75)
Change in fair value used as a basis to determine hedge ineffectiveness	(1,466)	(1,445)
Hedge ineffectiveness recognised in the income statement	£ (56)	£ (13)

Derivative financial instrume_8

Derivative financial instruments - Hedging instruments which are carried on the Group balance sheet (Fair value hedges) (Details) £ in Millions	12 Months Ended
	Dec. 31, 2020GBP (£)	Dec. 31, 2019GBP (£)
Directly impacted by IBOR reform [member]
Disclosure of detailed information about hedging instruments [line items]
Nominal amount	49,754
Fair value hedges [member]
Disclosure of detailed information about hedging instruments [line items]
Nominal amount	114,556	112,457
Change in fair value used as a basis to determine hedge ineffectiveness	£ (1,703)	£ (1,653)
Fair value hedges [member] | Directly impacted by IBOR reform [member]
Disclosure of detailed information about hedging instruments [line items]
Nominal amount	31,559	61,653
Fair value hedges [member] | Interest rate risk [member]
Disclosure of detailed information about hedging instruments [line items]
Nominal amount	103,623	104,568
Change in fair value used as a basis to determine hedge ineffectiveness	£ (925)	£ (1,571)
Fair value hedges [member] | Interest rate risk [member] | Directly impacted by IBOR reform [member]
Disclosure of detailed information about hedging instruments [line items]
Nominal amount	30,072	55,552
Fair value hedges [member] | Inflation risk [member]
Disclosure of detailed information about hedging instruments [line items]
Nominal amount	10,933	7,889
Change in fair value used as a basis to determine hedge ineffectiveness	£ (778)	£ (82)
Fair value hedges [member] | Inflation risk [member] | Directly impacted by IBOR reform [member]
Disclosure of detailed information about hedging instruments [line items]
Nominal amount	1,487	6,101
Derivatives [member] | Fair value hedges [member]
Disclosure of detailed information about hedging instruments [line items]
Hedging instrument, assets	£ 155	£ 136
Hedging instrument, liabilities	(980)	(586)
Derivatives [member] | Fair value hedges [member] | Interest rate risk [member]
Disclosure of detailed information about hedging instruments [line items]
Hedging instrument, assets	120	110
Hedging instrument, liabilities	(166)	(44)
Derivatives [member] | Fair value hedges [member] | Inflation risk [member]
Disclosure of detailed information about hedging instruments [line items]
Hedging instrument, assets	35	26
Hedging instrument, liabilities	(815)	(542)
Loan liabilities [member] | Fair value hedges [member]
Disclosure of detailed information about hedging instruments [line items]
Hedging instrument, liabilities	0	0
Loan liabilities [member] | Fair value hedges [member] | Interest rate risk [member]
Disclosure of detailed information about hedging instruments [line items]
Hedging instrument, liabilities	0	0
Loan liabilities [member] | Fair value hedges [member] | Inflation risk [member]
Disclosure of detailed information about hedging instruments [line items]
Hedging instrument, liabilities	£ 0	£ 0

Derivative financial instrume_9

Derivative financial instruments - The expected notional values of current hedging instruments in future years (Details) - Fair value hedges [member] £ in Millions	Dec. 31, 2020GBP (£)Hedges	Dec. 31, 2019GBP (£)Hedges
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]
Nominal amount	114,556	112,457
Interest rate risk [member]
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]
Nominal amount	103,623	104,568
Interest rate risk [member] | Fixed interest rate [member]
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]
For number of hedges | Hedges	1,906	2,308
The average rate % of the hedging instruments across the relationships	1.87%	2.13%
Inflation risk [member]
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]
Nominal amount	10,933	7,889
Inflation risk [member] | Fixed interest rate [member]
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]
For number of hedges | Hedges	104	117
The average rate % of the hedging instruments across the relationships	0.63%	0.70%
2020 [member] | Interest rate risk [member] | Fixed interest rate [member]
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]
Nominal amount	103,623
2020 [member] | Inflation risk [member] | Fixed interest rate [member]
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]
Nominal amount	10,933
2021 [member] | Interest rate risk [member] | Fixed interest rate [member]
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]
Nominal amount	94,402
2021 [member] | Inflation risk [member]
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]
Nominal amount	8,817
2021 [member] | Inflation risk [member] | Fixed interest rate [member]
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]
Nominal amount	10,128
2022 [member] | Interest rate risk [member] | Fixed interest rate [member]
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]
Nominal amount	81,916
2022 [member] | Inflation risk [member]
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]
Nominal amount	7,966
2022 [member] | Inflation risk [member] | Fixed interest rate [member]
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]
Nominal amount	8,817
2023 [member] | Interest rate risk [member] | Fixed interest rate [member]
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]
Nominal amount	72,281
2023 [member] | Inflation risk [member]
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]
Nominal amount	6,051
2023 [member] | Inflation risk [member] | Fixed interest rate [member]
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]
Nominal amount	7,966
2024 [member] | Interest rate risk [member] | Fixed interest rate [member]
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]
Nominal amount	58,001
2024 [member] | Inflation risk [member]
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]
Nominal amount	5,062
2024 [member] | Inflation risk [member] | Fixed interest rate [member]
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]
Nominal amount	6,051
2025 [member] | Interest rate risk [member] | Fixed interest rate [member]
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]
Nominal amount	47,244
2025 [member] | Inflation risk [member] | Fixed interest rate [member]
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]
Nominal amount	5,062
2026 and Later [member] | Interest rate risk [member] | Fixed interest rate [member]
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]
Nominal amount	40,243
2026 and Later [member] | Inflation risk [member] | Fixed interest rate [member]
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]
Nominal amount	4,348

Derivative financial instrum_10

Derivative financial instruments - Hedged items in cash flow hedges of net investments in foreign operations (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of detailed information about hedged items [line items]
Line item in the statement of comprehensive used to recognised ineffectiveness	Hedge ineffectiveness is recognised in net interest income.	Hedge ineffectiveness is recognised in net interest income.
Cash flow hedges [member]
Disclosure of detailed information about hedged items [line items]
Change in fair value used as a basis to determine hedge ineffectiveness	£ (1,513)	£ (725)
Balance in cash flow hedge reserve for continuing hedges	(743)	(249)
Balances remaining in cash flow hedge reserve for which hedge accounting is no longer applied	(1,370)	(1,072)
Hedging gains or losses recognised in other comprehensive income	(1,513)	(731)
Hedge ineffectiveness recognised in the income statement	28	45
Cash flow hedges [member] | Loans and advances [member] | Financial assets at amortised cost [member] | Interest rate risk [member]
Disclosure of detailed information about hedged items [line items]
Change in fair value used as a basis to determine hedge ineffectiveness	(1,124)	(696)
Balance in cash flow hedge reserve for continuing hedges	(598)	(223)
Balances remaining in cash flow hedge reserve for which hedge accounting is no longer applied	(1,370)	(1,072)
Hedging gains or losses recognised in other comprehensive income	(1,124)	(706)
Hedge ineffectiveness recognised in the income statement	27	43
Cash flow hedges [member] | Loans and advances [member] | Financial assets at amortised cost [member] | Foreign exchange risk [member]
Disclosure of detailed information about hedged items [line items]
Change in fair value used as a basis to determine hedge ineffectiveness	(70)
Balance in cash flow hedge reserve for continuing hedges	(15)
Balances remaining in cash flow hedge reserve for which hedge accounting is no longer applied	0
Hedging gains or losses recognised in other comprehensive income	(70)
Hedge ineffectiveness recognised in the income statement	0
Cash flow hedges [member] | Debt securities [member] | Financial assets at amortised cost [member] | Foreign exchange risk [member]
Disclosure of detailed information about hedged items [line items]
Change in fair value used as a basis to determine hedge ineffectiveness	(278)
Balance in cash flow hedge reserve for continuing hedges	(65)
Balances remaining in cash flow hedge reserve for which hedge accounting is no longer applied	0
Hedging gains or losses recognised in other comprehensive income	(278)
Hedge ineffectiveness recognised in the income statement	0
Cash flow hedges [member] | Debt securities [member] | Financial assets at amortised cost [member] | Inflation risk [member]
Disclosure of detailed information about hedged items [line items]
Change in fair value used as a basis to determine hedge ineffectiveness	(41)	(29)
Balance in cash flow hedge reserve for continuing hedges	(65)	(26)
Balances remaining in cash flow hedge reserve for which hedge accounting is no longer applied	0	0
Hedging gains or losses recognised in other comprehensive income	(41)	(25)
Hedge ineffectiveness recognised in the income statement	1	2
Hedges of net investment [member]
Disclosure of detailed information about hedged items [line items]
Change in fair value used as a basis to determine hedge ineffectiveness	(266)	288
Balance in foreign currency reserve for continuing hedges	902	1,087
Balances remaining in foreign currency translation reserve for which hedge accounting is no longer applied	186	256
Hedging gains or losses recognised in other comprehensive income	(266)	288
Hedge ineffectiveness recognised in the income statement	0	0
Hedges of net investment [member] | USD foreign operations
Disclosure of detailed information about hedged items [line items]
Change in fair value used as a basis to determine hedge ineffectiveness	(240)	215
Balance in foreign currency reserve for continuing hedges	857	1,087
Balances remaining in foreign currency translation reserve for which hedge accounting is no longer applied	0	0
Hedging gains or losses recognised in other comprehensive income	(240)	215
Hedge ineffectiveness recognised in the income statement	0	0
Hedges of net investment [member] | EUR foreign operations
Disclosure of detailed information about hedged items [line items]
Change in fair value used as a basis to determine hedge ineffectiveness	(17)	70
Balance in foreign currency reserve for continuing hedges	(2)	(1)
Balances remaining in foreign currency translation reserve for which hedge accounting is no longer applied	0	16
Hedging gains or losses recognised in other comprehensive income	(17)	70
Hedge ineffectiveness recognised in the income statement	0	0
Hedges of net investment [member] | Other foreign operations [member]
Disclosure of detailed information about hedged items [line items]
Change in fair value used as a basis to determine hedge ineffectiveness	(9)	3
Balance in foreign currency reserve for continuing hedges	47	1
Balances remaining in foreign currency translation reserve for which hedge accounting is no longer applied	186	240
Hedging gains or losses recognised in other comprehensive income	(9)	3
Hedge ineffectiveness recognised in the income statement	£ 0	£ 0

Derivative financial instrum_11

Derivative financial instruments - Hedging instruments which are carried on the Group balance sheet (Cash flow hedges and hedges of net investments in foreign operations) (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Directly impacted by IBOR reform [member]
Disclosure of detailed information about hedging instruments [line items]
Nominal amount	49,754
Cash flow hedges [member]
Disclosure of detailed information about hedging instruments [line items]
Nominal amount	74,437	67,773
Change in fair value used as a basis to determine hedge ineffectiveness	£ 1,541	£ 770
Cash flow hedges [member] | Directly impacted by IBOR reform [member]
Disclosure of detailed information about hedging instruments [line items]
Nominal amount	18,195	15,223
Cash flow hedges [member] | Interest rate risk [member]
Disclosure of detailed information about hedging instruments [line items]
Nominal amount	65,042	66,515
Change in fair value used as a basis to determine hedge ineffectiveness	£ 1,151	£ 739
Cash flow hedges [member] | Interest rate risk [member] | Directly impacted by IBOR reform [member]
Disclosure of detailed information about hedging instruments [line items]
Nominal amount	18,195	15,223
Cash flow hedges [member] | Foreign exchange risk [member]
Disclosure of detailed information about hedging instruments [line items]
Nominal amount	6,596
Change in fair value used as a basis to determine hedge ineffectiveness	£ 348
Cash flow hedges [member] | Foreign exchange risk [member] | Directly impacted by IBOR reform [member]
Disclosure of detailed information about hedging instruments [line items]
Nominal amount	0
Cash flow hedges [member] | Inflation risk [member]
Disclosure of detailed information about hedging instruments [line items]
Nominal amount	2,799	1,258
Change in fair value used as a basis to determine hedge ineffectiveness	£ 42	£ 31
Cash flow hedges [member] | Inflation risk [member] | Directly impacted by IBOR reform [member]
Disclosure of detailed information about hedging instruments [line items]
Nominal amount	0	0
Hedges of net investment [member] | Foreign exchange risk [member]
Disclosure of detailed information about hedging instruments [line items]
Nominal amount	9,451	11,196
Change in fair value used as a basis to determine hedge ineffectiveness	£ 265	£ 288
Hedges of net investment [member] | Foreign exchange risk [member] | Directly impacted by IBOR reform [member]
Disclosure of detailed information about hedging instruments [line items]
Nominal amount	0	0
Derivatives [member] | Cash flow hedges [member]
Disclosure of detailed information about hedging instruments [line items]
Hedging instrument, assets	£ 386	£ 7
Hedging instrument, liabilities	0	(1)
Derivatives [member] | Cash flow hedges [member] | Interest rate risk [member]
Disclosure of detailed information about hedging instruments [line items]
Hedging instrument, assets	33	3
Hedging instrument, liabilities	0	(1)
Derivatives [member] | Cash flow hedges [member] | Foreign exchange risk [member]
Disclosure of detailed information about hedging instruments [line items]
Hedging instrument, assets	351
Hedging instrument, liabilities	0
Derivatives [member] | Cash flow hedges [member] | Inflation risk [member]
Disclosure of detailed information about hedging instruments [line items]
Hedging instrument, assets	2	4
Hedging instrument, liabilities	0	0
Derivatives [member] | Hedges of net investment [member] | Foreign exchange risk [member]
Disclosure of detailed information about hedging instruments [line items]
Hedging instrument, assets	25	30
Hedging instrument, liabilities	0	0
Loan liabilities [member] | Cash flow hedges [member]
Disclosure of detailed information about hedging instruments [line items]
Hedging instrument, liabilities	0	0
Loan liabilities [member] | Cash flow hedges [member] | Interest rate risk [member]
Disclosure of detailed information about hedging instruments [line items]
Hedging instrument, liabilities	0	0
Loan liabilities [member] | Cash flow hedges [member] | Foreign exchange risk [member]
Disclosure of detailed information about hedging instruments [line items]
Hedging instrument, liabilities	0
Loan liabilities [member] | Cash flow hedges [member] | Inflation risk [member]
Disclosure of detailed information about hedging instruments [line items]
Hedging instrument, liabilities	0	0
Loan liabilities [member] | Hedges of net investment [member] | Foreign exchange risk [member]
Disclosure of detailed information about hedging instruments [line items]
Hedging instrument, liabilities	£ (8,660)	£ (10,051)

Derivative financial instrum_12

Derivative financial instruments - Effect on the income statement and OCI of recycling amounts in respect of Cash flow hedges and Net investment hedges of foreign operations (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Other income [member]
Disclosure of information about amounts that affected statement of comprehensive income as result of hedge accounting [line items]
Amount recycled from OCI due to hedged item affecting income statement, hedges of net investments in foreign operations	£ 0	£ 0
Amount recycled from other comprehensive income due to sale of investment or cash flows no longer expected to occur, hedges of net investments in foreign operations	(4)	15
Interest rate risk [member] | Interest income [member]
Disclosure of information about amounts that affected statement of comprehensive income as result of hedge accounting [line items]
Amount recycled from OCI due to hedged item affecting income statement, cash flow hedges	489	259
Amount recycled from other comprehensive income due to sale of investment or cash flows no longer expected to occur, cash flow hedges	17	18
Amount recycled from OCI due to hedged item affecting income statement, hedges of net investments in foreign operations	268	0
Amount recycled from other comprehensive income due to sale of investment or cash flows no longer expected to occur, hedges of net investments in foreign operations	£ 0	£ 0

Derivative financial instrum_13

Derivative financial instruments (Narrative) (Details) - Hedges	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]
Description of nature of risks being hedged	Hedge accounting is applied predominantly for the following risks: Interest rate risk – arises due to a mismatch between fixed interest rates and floating interest rates. Interest rate risk also includes exposure to inflation risk for certain types of investments. Currency risk – arises due to assets or liabilities being denominated in different currencies than the functional currency of the relevant entity. At a consolidated level, currency risk also arises when the functional currency of subsidiaries are different from the parent. Contractually linked inflation risk – arises from financial instruments within contractually specified inflation risk. The Group does not hedge inflation risk that arises from other activities.
Description of financial instruments designated as hedging instruments	In order to hedge these risks, the Group uses the following hedging instruments: Interest rate derivatives to swap interest rate exposures into either fixed or variable rates. Currency derivatives to swap foreign currency exposures into the entity’s functional currency, and net investment exposure to local currency. Inflation derivatives to swap inflation exposure into either fixed or variable interest rates.
Description of how entity reflects its risk management strategy by using hedge accounting and designating hedging relationships that it frequently resets	In respect of many of the Group’s hedge accounting relationships, the hedged item and hedging instrument change frequently due to the dynamic nature of the risk management and hedge accounting strategy. The Group applies hedge accounting to dynamic scenarios, predominantly in relation to interest rate risk, with a combination of hedged items in order for its financial statements to reflect as closely as possible the economic risk management undertaken. In some cases, if the hedge accounting objective changes, the relevant hedge accounting relationship is de-designated and is replaced with a different hedge accounting relationship.
Description of how entity determines economic relationship between hedged item and hedging instrument for purpose of assessing hedge effectiveness	The hedging instruments share the same risk exposures as the hedged items. Hedge effectiveness is determined with reference to quantitative tests, predominantly regression testing, but to the extent hedging instruments are exposed to different risks than the hedged items, this could result in hedge ineffectiveness or hedge accounting failures. Sources of ineffectiveness include the following: Mismatches between the contractual terms of the hedged item and hedging instrument, including basis differences. Changes in credit risk of the hedging instruments. If a hedging relationship becomes over-hedged, for example in hedges of net investments if the net asset value designated at the start of the period falls below the amount of the hedging instrument. Cash flow hedges using external swaps with non-zero fair values. The effects of the forthcoming reforms to IBOR because these might take effect at a different time and have a different impact on hedged items and hedging instruments.
Cash flow hedges [member] | Foreign exchange risk [member]
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]
For number of hedges	29
The average rate % of the hedging instruments across the relationships	135.29%

Financial assets at fair valu_7

Financial assets at fair value through other comprehensive income (Details) - GBP (£) £ in Millions	Dec. 31, 2020	Dec. 31, 2019
Disclosure of financial assets [line items]
Financial assets at fair value through other comprehensive income	£ 78,688	£ 65,750
Loans and advances [member]
Disclosure of financial assets [line items]
Financial assets at fair value through other comprehensive income	191	624
Debt securities and other eligible bills [member]
Disclosure of financial assets [line items]
Financial assets at fair value through other comprehensive income	77,736	64,103
Equity securities [member]
Disclosure of financial assets [line items]
Financial assets at fair value through other comprehensive income	£ 761	£ 1,023

Financial liabilities designa_3

Financial liabilities designated at fair value (Details) - GBP (£) £ in Millions	Dec. 31, 2020	Dec. 31, 2019
Disclosure of financial liabilities [line items]
Debt securities	£ 75,796	£ 76,369
Repurchase agreements and other similar secured borrowing	14,174	14,517
Other financial liabilities	4,969	5,019
Financial liabilities designated at fair value	249,765	204,326
Cumulative own credit net loss recognised	954	373
Contractual carrying amount due on maturity [member]
Disclosure of financial liabilities [line items]
Debt securities	57,650	56,891
Deposits	22,107	25,725
Repurchase agreements and other similar secured borrowing	177,389	128,706
Other financial liabilities	251	694
Financial liabilities designated at fair value	257,397	212,016
Fair value [member]
Disclosure of financial liabilities [line items]
Debt securities	50,437	49,559
Deposits	21,706	25,526
Repurchase agreements and other similar secured borrowing	177,371	128,547
Other financial liabilities	251	694
Financial liabilities designated at fair value	£ 249,765	£ 204,326

Fair value of financial instr_3

Fair value of financial instruments - Assets and liabilities held at fair value disaggregated by valuation technique (Details) - GBP (£) £ in Millions	Dec. 31, 2020	Dec. 31, 2019
Assets
Trading portfolio assets	£ 127,950	£ 114,195
Financial assets at fair value through the income statement	175,151	133,086
Derivative financial assets	302,446	229,236
Financial assets at fair value through other comprehensive income	78,688	65,750
Total assets	15,001	14,361
Liabilities
Trading portfolio liabilities	(47,405)	(36,916)
Financial liabilities designated at fair value	(249,765)	(204,326)
Derivative financial liabilities	(300,775)	(229,204)
Total liabilities	(6,622)	(4,351)
At fair value [member]
Assets
Trading portfolio assets	127,950	114,195
Financial assets at fair value through the income statement	175,151	133,086
Derivative financial assets	302,446	229,236
Financial assets at fair value through other comprehensive income	78,688	65,750
Investment property	10	13
Total assets	684,245	542,280
Liabilities
Trading portfolio liabilities	(47,405)	(36,916)
Financial liabilities designated at fair value	(249,765)	(204,326)
Derivative financial liabilities	(300,775)	(229,204)
Total liabilities	(597,945)	(470,446)
Level 1 of fair value hierarchy [member] | At fair value [member]
Assets
Trading portfolio assets	60,671	60,352
Financial assets at fair value through the income statement	4,503	10,445
Derivative financial assets	9,155	5,439
Financial assets at fair value through other comprehensive income	19,792	18,755
Investment property	0	0
Total assets	94,121	94,991
Liabilities
Trading portfolio liabilities	(24,391)	(20,977)
Financial liabilities designated at fair value	(159)	(82)
Derivative financial liabilities	(8,762)	(5,305)
Total liabilities	(33,312)	(26,364)
Level 2 of fair value hierarchy [member] | At fair value [member]
Assets
Trading portfolio assets	65,416	51,579
Financial assets at fair value through the income statement	162,142	114,141
Derivative financial assets	288,822	220,642
Financial assets at fair value through other comprehensive income	58,743	46,566
Investment property	0	0
Total assets	575,123	432,928
Liabilities
Trading portfolio liabilities	(22,986)	(15,939)
Financial liabilities designated at fair value	(249,251)	(203,882)
Derivative financial liabilities	(285,774)	(219,910)
Total liabilities	(558,011)	(439,731)
Level 3 of fair value hierarchy [member] | At fair value [member]
Assets
Trading portfolio assets	1,863	2,264
Financial assets at fair value through the income statement	8,506	8,500
Derivative financial assets	4,469	3,155
Financial assets at fair value through other comprehensive income	153	429
Investment property	10	13
Total assets	15,001	14,361
Liabilities
Trading portfolio liabilities	(28)	0
Financial liabilities designated at fair value	(355)	(362)
Derivative financial liabilities	(6,239)	(3,989)
Total liabilities	£ (6,622)	£ (4,351)

Fair value of financial instr_4

Fair value of financial instruments - Assets and liabilities held at fair value disaggregated by product type (Details) - GBP (£) £ in Millions	Dec. 31, 2020	Dec. 31, 2019
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	£ 15,001	£ 14,361
Financial liabilities, at fair value	(6,622)	(4,351)
Asset-backed securities [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	767	756
Financial liabilities, at fair value	(24)	0
Corporate debt [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	698	521
Financial liabilities, at fair value	(3)	0
Reverse repurchase and repurchase agreements [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	0	0
Financial liabilities, at fair value	(174)	(167)
Non-asset-backed loans [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	6,394	6,811
Financial liabilities, at fair value	0	0
Equity cash products [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	542	1,228
Financial liabilities, at fair value	0	0
Private equity investments [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	873	899
Financial liabilities, at fair value	(14)	(19)
Other [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	1,258	991
Financial liabilities, at fair value	(168)	(176)
Interest rate derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	1,613	605
Financial liabilities, at fair value	(1,615)	(812)
Foreign exchange derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	144	291
Financial liabilities, at fair value	(143)	(298)
Credit derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	196	539
Financial liabilities, at fair value	(351)	(342)
Equity derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	2,498	1,711
Financial liabilities, at fair value	(4,112)	(2,528)
Commodity derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	18	9
Financial liabilities, at fair value	£ (18)	£ (9)

Fair value of financial instr_5

Fair value of financial instruments - Analysis of movements in Level 3 assets and liabilities (Details) - GBP (£) £ in Millions	1 Months Ended	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2020	Dec. 31, 2019
Assets
Beginning balance, financial assets		£ 14,361
Ending balance, financial assets	£ 15,001	15,001	£ 14,361
Liabilities
Beginning balance, financial liabilities		(4,351)
Ending balance, financial liabilities	(6,622)	(6,622)	(4,351)
Recurring fair value measurement [member] | Significant unobservable inputs (Level 3) [member]
Assets (liabilities)
Beginning balance, Assets (liabilities) net		10,010	13,548
Purchases, fair value measurement, assets (liabilities) net		6,580	8,160
Sales, fair value measurement, assets (liabilities) net		(7,177)	(8,951)
Issues, fair value measurement, assets (liabilities) net		(21)	(42)
Settlements, fair value measurement, assets (liabilities) net		(1,189)	(2,089)
Gains (losses) recognised in other comprehensive income, fair value measurement, assets (liabilities) net		(4)	59
Transfers into Level 3 of fair value hierarchy, assets (liabilities) net		455	337
Transfers out of Level 3 of fair value hierarchy, assets (liabilities) net		(411)	1,298
Ending balance, Assets (liabilities) net	8,379	8,379	10,010
Recurring fair value measurement [member] | Significant unobservable inputs (Level 3) [member] | Net assets (liabilities) at fair value through profit or loss, category trading income [Member]
Assets (liabilities)
Gains (losses) recognised in profit or loss, fair value measurement, assets (liabilities) net		268	41
Recurring fair value measurement [member] | Significant unobservable inputs (Level 3) [member] | Net assets (liabilities) at fair value through profit or loss, category other income [Member]
Assets (liabilities)
Gains (losses) recognised in profit or loss, fair value measurement, assets (liabilities) net		(132)	245
Recurring fair value measurement [member] | Net derivative financial instruments [member] | Significant unobservable inputs (Level 3) [member]
Assets (liabilities)
Beginning balance, Assets (liabilities) net		(834)	472
Purchases, fair value measurement, assets (liabilities) net		(807)	(364)
Sales, fair value measurement, assets (liabilities) net		(31)	(32)
Issues, fair value measurement, assets (liabilities) net		0	0
Settlements, fair value measurement, assets (liabilities) net		(160)	(755)
Gains (losses) recognised in other comprehensive income, fair value measurement, assets (liabilities) net		0	0
Transfers into Level 3 of fair value hierarchy, assets (liabilities) net		(71)	(255)
Transfers out of Level 3 of fair value hierarchy, assets (liabilities) net		117	424
Ending balance, Assets (liabilities) net	(1,770)	(1,770)	(834)
Recurring fair value measurement [member] | Net derivative financial instruments [member] | Significant unobservable inputs (Level 3) [member] | Net assets (liabilities) at fair value through profit or loss, category trading income [Member]
Assets (liabilities)
Gains (losses) recognised in profit or loss, fair value measurement, assets (liabilities) net		16	(324)
Recurring fair value measurement [member] | Net derivative financial instruments [member] | Significant unobservable inputs (Level 3) [member] | Net assets (liabilities) at fair value through profit or loss, category other income [Member]
Assets (liabilities)
Gains (losses) recognised in profit or loss, fair value measurement, assets (liabilities) net		0	0
Recurring fair value measurement [member] | Investment property [member] | Significant unobservable inputs (Level 3) [member]
Assets
Beginning balance, financial assets		13	9
Purchases, fair value measurement, assets		0	5
Sales, fair value measurement, assets		(2)	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	10	10	13
Recurring fair value measurement [member] | Investment property [member] | Significant unobservable inputs (Level 3) [member] | Financial assets at fair value through profit or loss, category trading [member]
Assets
Total gains and losses in the period recognised in the income statement, assets		0	0
Recurring fair value measurement [member] | Investment property [member] | Significant unobservable inputs (Level 3) [member] | Financial assets at fair value through profit or loss, category other income [member]
Assets
Total gains and losses in the period recognised in the income statement, assets		(1)	(1)
Trading portfolio liabilities [member] | Recurring fair value measurement [member] | Significant unobservable inputs (Level 3) [member]
Liabilities
Beginning balance, financial liabilities		0	(3)
Purchases, fair value measurement, liabilities		(27)	0
Sales, fair value measurement, liabilities		0	0
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		0	0
Transfers out of Level 3 of fair value hierarchy, liabilities		0	3
Ending balance, financial liabilities	(28)	(28)	0
Trading portfolio liabilities [member] | Recurring fair value measurement [member] | Significant unobservable inputs (Level 3) [member] | Financial liabilities at fair value through profit or loss, category trading [member]
Liabilities
Total gains and losses in the period recognised in the income statement, liabilities		(1)	0
Trading portfolio liabilities [member] | Recurring fair value measurement [member] | Significant unobservable inputs (Level 3) [member] | Financial liabilities at fair value through profit or loss, category other income [member]
Liabilities
Total gains and losses in the period recognised in the income statement, liabilities		0	0
Financial liabilities designated at fair value [member] | Recurring fair value measurement [member] | Significant unobservable inputs (Level 3) [member]
Liabilities
Beginning balance, financial liabilities		(362)	(280)
Purchases, fair value measurement, liabilities		0	(179)
Sales, fair value measurement, liabilities		(3)	(10)
Issues, fair value measurement, liabilities		(21)	(42)
Settlements, fair value measurement, liabilities		1	41
Total gains or losses recognised in OCI, liabilities		0	0
Transfers into Level 3 of fair value hierarchy, liabilities		(38)	(27)
Transfers out of Level 3 of fair value hierarchy, liabilities		38	50
Ending balance, financial liabilities	(355)	(355)	(362)
Financial liabilities designated at fair value [member] | Recurring fair value measurement [member] | Significant unobservable inputs (Level 3) [member] | Financial liabilities at fair value through profit or loss, category trading [member]
Liabilities
Total gains and losses in the period recognised in the income statement, liabilities		20	67
Financial liabilities designated at fair value [member] | Recurring fair value measurement [member] | Significant unobservable inputs (Level 3) [member] | Financial liabilities at fair value through profit or loss, category other income [member]
Liabilities
Total gains and losses in the period recognised in the income statement, liabilities		4	(2)
Asset-backed loans [member]
Assets
Beginning balance, financial assets		756
Ending balance, financial assets	767	767	756
Liabilities
Beginning balance, financial liabilities		0
Ending balance, financial liabilities	(24)	(24)	0
Interest rate derivatives [member]
Assets
Beginning balance, financial assets		605
Ending balance, financial assets	1,613	1,613	605
Liabilities
Beginning balance, financial liabilities		(812)
Ending balance, financial liabilities	(1,615)	(1,615)	(812)
Interest rate derivatives [member] | Recurring fair value measurement [member] | Net derivative financial instruments [member] | Significant unobservable inputs (Level 3) [member]
Assets (liabilities)
Beginning balance, Assets (liabilities) net		(206)	22
Purchases, fair value measurement, assets (liabilities) net		17	(9)
Sales, fair value measurement, assets (liabilities) net		(12)	0
Issues, fair value measurement, assets (liabilities) net		0	0
Settlements, fair value measurement, assets (liabilities) net		85	88
Gains (losses) recognised in other comprehensive income, fair value measurement, assets (liabilities) net		0	0
Transfers into Level 3 of fair value hierarchy, assets (liabilities) net		(18)	(177)
Transfers out of Level 3 of fair value hierarchy, assets (liabilities) net		23	(38)
Ending balance, Assets (liabilities) net	(2)	(2)	(206)
Interest rate derivatives [member] | Recurring fair value measurement [member] | Net derivative financial instruments [member] | Significant unobservable inputs (Level 3) [member] | Net assets (liabilities) at fair value through profit or loss, category trading income [Member]
Assets (liabilities)
Gains (losses) recognised in profit or loss, fair value measurement, assets (liabilities) net		109	(92)
Interest rate derivatives [member] | Recurring fair value measurement [member] | Net derivative financial instruments [member] | Significant unobservable inputs (Level 3) [member] | Net assets (liabilities) at fair value through profit or loss, category other income [Member]
Assets (liabilities)
Gains (losses) recognised in profit or loss, fair value measurement, assets (liabilities) net		0	0
Foreign exchange derivatives [member]
Assets
Beginning balance, financial assets		291
Ending balance, financial assets	144	144	291
Liabilities
Beginning balance, financial liabilities		(298)
Ending balance, financial liabilities	(143)	(143)	(298)
Foreign exchange derivatives [member] | Recurring fair value measurement [member] | Net derivative financial instruments [member] | Significant unobservable inputs (Level 3) [member]
Assets (liabilities)
Beginning balance, Assets (liabilities) net		(7)	7
Purchases, fair value measurement, assets (liabilities) net		0	0
Sales, fair value measurement, assets (liabilities) net		0	0
Issues, fair value measurement, assets (liabilities) net		0	0
Settlements, fair value measurement, assets (liabilities) net		21	25
Gains (losses) recognised in other comprehensive income, fair value measurement, assets (liabilities) net		0	0
Transfers into Level 3 of fair value hierarchy, assets (liabilities) net		(19)	(32)
Transfers out of Level 3 of fair value hierarchy, assets (liabilities) net		22	5
Ending balance, Assets (liabilities) net	1	1	(7)
Foreign exchange derivatives [member] | Recurring fair value measurement [member] | Net derivative financial instruments [member] | Significant unobservable inputs (Level 3) [member] | Net assets (liabilities) at fair value through profit or loss, category trading income [Member]
Assets (liabilities)
Gains (losses) recognised in profit or loss, fair value measurement, assets (liabilities) net		(16)	(12)
Foreign exchange derivatives [member] | Recurring fair value measurement [member] | Net derivative financial instruments [member] | Significant unobservable inputs (Level 3) [member] | Net assets (liabilities) at fair value through profit or loss, category other income [Member]
Assets (liabilities)
Gains (losses) recognised in profit or loss, fair value measurement, assets (liabilities) net		0	0
Credit derivatives [member]
Assets
Beginning balance, financial assets		539
Ending balance, financial assets	196	196	539
Liabilities
Beginning balance, financial liabilities		(342)
Ending balance, financial liabilities	(351)	(351)	(342)
Credit derivatives [member] | Recurring fair value measurement [member] | Net derivative financial instruments [member] | Significant unobservable inputs (Level 3) [member]
Assets (liabilities)
Beginning balance, Assets (liabilities) net		198	1,050
Purchases, fair value measurement, assets (liabilities) net		(125)	(59)
Sales, fair value measurement, assets (liabilities) net		24	3
Issues, fair value measurement, assets (liabilities) net		0	0
Settlements, fair value measurement, assets (liabilities) net		(371)	(866)
Gains (losses) recognised in other comprehensive income, fair value measurement, assets (liabilities) net		0	0
Transfers into Level 3 of fair value hierarchy, assets (liabilities) net		(21)	(9)
Transfers out of Level 3 of fair value hierarchy, assets (liabilities) net		116	3
Ending balance, Assets (liabilities) net	(155)	(155)	198
Credit derivatives [member] | Recurring fair value measurement [member] | Net derivative financial instruments [member] | Significant unobservable inputs (Level 3) [member] | Net assets (liabilities) at fair value through profit or loss, category trading income [Member]
Assets (liabilities)
Gains (losses) recognised in profit or loss, fair value measurement, assets (liabilities) net		24	76
Credit derivatives [member] | Recurring fair value measurement [member] | Net derivative financial instruments [member] | Significant unobservable inputs (Level 3) [member] | Net assets (liabilities) at fair value through profit or loss, category other income [Member]
Assets (liabilities)
Gains (losses) recognised in profit or loss, fair value measurement, assets (liabilities) net		0	0
Equity derivatives [member]
Assets
Beginning balance, financial assets		1,711
Ending balance, financial assets	2,498	2,498	1,711
Liabilities
Beginning balance, financial liabilities		(2,528)
Ending balance, financial liabilities	(4,112)	(4,112)	(2,528)
Equity derivatives [member] | Recurring fair value measurement [member] | Net derivative financial instruments [member] | Significant unobservable inputs (Level 3) [member]
Assets (liabilities)
Beginning balance, Assets (liabilities) net		(819)	(607)
Purchases, fair value measurement, assets (liabilities) net		(699)	(296)
Sales, fair value measurement, assets (liabilities) net		(43)	(35)
Issues, fair value measurement, assets (liabilities) net		0	0
Settlements, fair value measurement, assets (liabilities) net		105	(2)
Gains (losses) recognised in other comprehensive income, fair value measurement, assets (liabilities) net		0	0
Transfers into Level 3 of fair value hierarchy, assets (liabilities) net		(13)	(37)
Transfers out of Level 3 of fair value hierarchy, assets (liabilities) net		(44)	454
Ending balance, Assets (liabilities) net	(1,614)	(1,614)	(819)
Equity derivatives [member] | Recurring fair value measurement [member] | Net derivative financial instruments [member] | Significant unobservable inputs (Level 3) [member] | Net assets (liabilities) at fair value through profit or loss, category trading income [Member]
Assets (liabilities)
Gains (losses) recognised in profit or loss, fair value measurement, assets (liabilities) net		(101)	(296)
Equity derivatives [member] | Recurring fair value measurement [member] | Net derivative financial instruments [member] | Significant unobservable inputs (Level 3) [member] | Net assets (liabilities) at fair value through profit or loss, category other income [Member]
Assets (liabilities)
Gains (losses) recognised in profit or loss, fair value measurement, assets (liabilities) net		0	0
Corporate debt [member]
Assets
Beginning balance, financial assets		521
Ending balance, financial assets	698	698	521
Liabilities
Beginning balance, financial liabilities		0
Ending balance, financial liabilities	(3)	(3)	0
Non-asset-backed loans [member]
Assets
Beginning balance, financial assets		6,811
Ending balance, financial assets	6,394	6,394	6,811
Liabilities
Beginning balance, financial liabilities		0
Ending balance, financial liabilities	0	0	0
Equity cash products [member]
Assets
Beginning balance, financial assets		1,228
Ending balance, financial assets	542	542	1,228
Liabilities
Beginning balance, financial liabilities		0
Ending balance, financial liabilities	0	0	0
Private equity investments [member]
Assets
Beginning balance, financial assets		899
Ending balance, financial assets	873	873	899
Liabilities
Beginning balance, financial liabilities		(19)
Ending balance, financial liabilities	(14)	(14)	(19)
Other [member]
Assets
Beginning balance, financial assets		991
Ending balance, financial assets	1,258	1,258	991
Liabilities
Beginning balance, financial liabilities		(176)
Ending balance, financial liabilities	(168)	(168)	(176)
Trading portfolio assets [member] | Recurring fair value measurement [member] | Significant unobservable inputs (Level 3) [member]
Assets
Beginning balance, financial assets		2,264	3,613
Purchases, fair value measurement, assets		2,495	2,234
Sales, fair value measurement, assets		(2,765)	(3,057)
Issues, fair value measurement, assets		0	0
Settlements, fair value measurement, assets		(52)	(446)
Total gains or losses recognised in OCI, assets		0	0
Transfers into Level 3 of fair value hierarchy, assets		154	554
Transfers out of Level 3 of fair value hierarchy, assets		(101)	(574)
Ending balance, financial assets	1,863	1,863	2,264
Trading portfolio assets [member] | Recurring fair value measurement [member] | Significant unobservable inputs (Level 3) [member] | Financial assets at fair value through profit or loss, category trading [member]
Assets
Total gains and losses in the period recognised in the income statement, assets		(132)	(60)
Trading portfolio assets [member] | Recurring fair value measurement [member] | Significant unobservable inputs (Level 3) [member] | Financial assets at fair value through profit or loss, category other income [member]
Assets
Total gains and losses in the period recognised in the income statement, assets		0	0
Trading portfolio assets [member] | Asset-backed loans [member] | Recurring fair value measurement [member] | Significant unobservable inputs (Level 3) [member]
Assets
Beginning balance, financial assets		656	664
Purchases, fair value measurement, assets		458	202
Sales, fair value measurement, assets		(428)	(166)
Issues, fair value measurement, assets		0	0
Settlements, fair value measurement, assets		(40)	0
Total gains or losses recognised in OCI, assets		0	0
Transfers into Level 3 of fair value hierarchy, assets		90	16
Transfers out of Level 3 of fair value hierarchy, assets		(25)	(30)
Ending balance, financial assets	686	686	656
Trading portfolio assets [member] | Asset-backed loans [member] | Recurring fair value measurement [member] | Significant unobservable inputs (Level 3) [member] | Financial assets at fair value through profit or loss, category trading [member]
Assets
Total gains and losses in the period recognised in the income statement, assets		(25)	(30)
Trading portfolio assets [member] | Asset-backed loans [member] | Recurring fair value measurement [member] | Significant unobservable inputs (Level 3) [member] | Financial assets at fair value through profit or loss, category other income [member]
Assets
Total gains and losses in the period recognised in the income statement, assets		0	0
Trading portfolio assets [member] | Corporate debt [member] | Recurring fair value measurement [member] | Significant unobservable inputs (Level 3) [member]
Assets
Beginning balance, financial assets		120	388
Purchases, fair value measurement, assets		77	126
Sales, fair value measurement, assets		(6)	(52)
Issues, fair value measurement, assets		0	0
Settlements, fair value measurement, assets		0	(311)
Total gains or losses recognised in OCI, assets		0	0
Transfers into Level 3 of fair value hierarchy, assets		12	45
Transfers out of Level 3 of fair value hierarchy, assets		(17)	(77)
Ending balance, financial assets	151	151	120
Trading portfolio assets [member] | Corporate debt [member] | Recurring fair value measurement [member] | Significant unobservable inputs (Level 3) [member] | Financial assets at fair value through profit or loss, category trading [member]
Assets
Total gains and losses in the period recognised in the income statement, assets		(35)	1
Trading portfolio assets [member] | Corporate debt [member] | Recurring fair value measurement [member] | Significant unobservable inputs (Level 3) [member] | Financial assets at fair value through profit or loss, category other income [member]
Assets
Total gains and losses in the period recognised in the income statement, assets		0	0
Trading portfolio assets [member] | Non-asset-backed loans [member] | Recurring fair value measurement [member] | Significant unobservable inputs (Level 3) [member]
Assets
Beginning balance, financial assets		974	2,263
Purchases, fair value measurement, assets		1,955	1,844
Sales, fair value measurement, assets		(2,182)	(2,799)
Issues, fair value measurement, assets		0	0
Settlements, fair value measurement, assets		(12)	(134)
Total gains or losses recognised in OCI, assets		0	0
Transfers into Level 3 of fair value hierarchy, assets		39	200
Transfers out of Level 3 of fair value hierarchy, assets		(55)	(424)
Ending balance, financial assets	709	709	974
Trading portfolio assets [member] | Non-asset-backed loans [member] | Recurring fair value measurement [member] | Significant unobservable inputs (Level 3) [member] | Financial assets at fair value through profit or loss, category trading [member]
Assets
Total gains and losses in the period recognised in the income statement, assets		(10)	24
Trading portfolio assets [member] | Non-asset-backed loans [member] | Recurring fair value measurement [member] | Significant unobservable inputs (Level 3) [member] | Financial assets at fair value through profit or loss, category other income [member]
Assets
Total gains and losses in the period recognised in the income statement, assets		0	0
Trading portfolio assets [member] | Equity cash products [member] | Recurring fair value measurement [member] | Significant unobservable inputs (Level 3) [member]
Assets
Beginning balance, financial assets		392	136
Purchases, fair value measurement, assets		5	62
Sales, fair value measurement, assets		(149)	(40)
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		11	293
Transfers out of Level 3 of fair value hierarchy, assets		(4)	(28)
Ending balance, financial assets	214	214	392
Trading portfolio assets [member] | Equity cash products [member] | Recurring fair value measurement [member] | Significant unobservable inputs (Level 3) [member] | Financial assets at fair value through profit or loss, category trading [member]
Assets
Total gains and losses in the period recognised in the income statement, assets		(41)	(31)
Trading portfolio assets [member] | Equity cash products [member] | Recurring fair value measurement [member] | Significant unobservable inputs (Level 3) [member] | Financial assets at fair value through profit or loss, category other income [member]
Assets
Total gains and losses in the period recognised in the income statement, assets		0	0
Trading portfolio assets [member] | Other [member] | Recurring fair value measurement [member] | Significant unobservable inputs (Level 3) [member]
Assets
Beginning balance, financial assets		122	162
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	(1)
Total gains or losses recognised in OCI, assets		0	0
Transfers into Level 3 of fair value hierarchy, assets		2	0
Transfers out of Level 3 of fair value hierarchy, assets		0	(15)
Ending balance, financial assets	103	103	122
Trading portfolio assets [member] | Other [member] | Recurring fair value measurement [member] | Significant unobservable inputs (Level 3) [member] | Financial assets at fair value through profit or loss, category trading [member]
Assets
Total gains and losses in the period recognised in the income statement, assets		(21)	(24)
Trading portfolio assets [member] | Other [member] | Recurring fair value measurement [member] | Significant unobservable inputs (Level 3) [member] | Financial assets at fair value through profit or loss, category other income [member]
Assets
Total gains and losses in the period recognised in the income statement, assets		0	0
From financial assets at fair value through the income statement under IAS 39 [member] | Recurring fair value measurement [member] | Significant unobservable inputs (Level 3) [member]
Assets
Beginning balance, financial assets		8,500	9,382
Purchases, fair value measurement, assets		4,919	6,065
Sales, fair value measurement, assets		(4,347)	(5,841)
Issues, fair value measurement, assets		0	0
Settlements, fair value measurement, assets		(741)	(794)
Total gains or losses recognised in OCI, assets		0	0
Transfers into Level 3 of fair value hierarchy, assets		410	65
Transfers out of Level 3 of fair value hierarchy, assets		(465)	(983)
Ending balance, financial assets	8,506	8,506	8,500
From financial assets at fair value through the income statement under IAS 39 [member] | Recurring fair value measurement [member] | Significant unobservable inputs (Level 3) [member] | Financial assets at fair value through profit or loss, category trading [member]
Assets
Total gains and losses in the period recognised in the income statement, assets		365	358
From financial assets at fair value through the income statement under IAS 39 [member] | Recurring fair value measurement [member] | Significant unobservable inputs (Level 3) [member] | Financial assets at fair value through profit or loss, category other income [member]
Assets
Total gains and losses in the period recognised in the income statement, assets		(135)	248
From financial assets at fair value through the income statement under IAS 39 [member] | Non-asset-backed loans [member] | Recurring fair value measurement [member] | Significant unobservable inputs (Level 3) [member]
Assets
Beginning balance, financial assets		5,494	5,688
Purchases, fair value measurement, assets		1,102	235
Sales, fair value measurement, assets		(283)	0
Issues, fair value measurement, assets		0	0
Settlements, fair value measurement, assets		(706)	(755)
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		(453)	(16)
Ending balance, financial assets	5,580	5,580	5,494
From financial assets at fair value through the income statement under IAS 39 [member] | Non-asset-backed loans [member] | Recurring fair value measurement [member] | Significant unobservable inputs (Level 3) [member] | Financial assets at fair value through profit or loss, category trading [member]
Assets
Total gains and losses in the period recognised in the income statement, assets		426	343
From financial assets at fair value through the income statement under IAS 39 [member] | Non-asset-backed loans [member] | Recurring fair value measurement [member] | Significant unobservable inputs (Level 3) [member] | Financial assets at fair value through profit or loss, category other income [member]
Assets
Total gains and losses in the period recognised in the income statement, assets		0	(1)
From financial assets at fair value through the income statement under IAS 39 [member] | Equity cash products [member] | Recurring fair value measurement [member] | Significant unobservable inputs (Level 3) [member]
Assets
Beginning balance, financial assets		835	559
Purchases, fair value measurement, assets	15	15	66
Sales, fair value measurement, assets	(404)	(404)	0
Issues, fair value measurement, assets	0	0	0
Settlements, fair value measurement, assets	0	0	(2)
Total gains or losses recognised in OCI, assets		0	0
Transfers into Level 3 of fair value hierarchy, assets		9	0
Transfers out of Level 3 of fair value hierarchy, assets		0	0
Ending balance, financial assets	326	326	835
From financial assets at fair value through the income statement under IAS 39 [member] | Equity cash products [member] | Recurring fair value measurement [member] | Significant unobservable inputs (Level 3) [member] | Financial assets at fair value through profit or loss, category trading [member]
Assets
Total gains and losses in the period recognised in the income statement, assets		(93)	3
From financial assets at fair value through the income statement under IAS 39 [member] | Equity cash products [member] | Recurring fair value measurement [member] | Significant unobservable inputs (Level 3) [member] | Financial assets at fair value through profit or loss, category other income [member]
Assets
Total gains and losses in the period recognised in the income statement, assets		(36)	209
From financial assets at fair value through the income statement under IAS 39 [member] | Private equity investments [member] | Recurring fair value measurement [member] | Significant unobservable inputs (Level 3) [member]
Assets
Beginning balance, financial assets		900	1,071
Purchases, fair value measurement, assets	84	84	45
Sales, fair value measurement, assets	(54)	(54)	(121)
Issues, fair value measurement, assets	0	0	0
Settlements, fair value measurement, assets	(3)	(3)	(28)
Total gains or losses recognised in OCI, assets		0	0
Transfers into Level 3 of fair value hierarchy, assets		15	41
Transfers out of Level 3 of fair value hierarchy, assets		(12)	(163)
Ending balance, financial assets	874	874	900
From financial assets at fair value through the income statement under IAS 39 [member] | Private equity investments [member] | Recurring fair value measurement [member] | Significant unobservable inputs (Level 3) [member] | Financial assets at fair value through profit or loss, category trading [member]
Assets
Total gains and losses in the period recognised in the income statement, assets		0	0
From financial assets at fair value through the income statement under IAS 39 [member] | Private equity investments [member] | Recurring fair value measurement [member] | Significant unobservable inputs (Level 3) [member] | Financial assets at fair value through profit or loss, category other income [member]
Assets
Total gains and losses in the period recognised in the income statement, assets		(56)	55
From financial assets at fair value through the income statement under IAS 39 [member] | Other [member] | Recurring fair value measurement [member] | Significant unobservable inputs (Level 3) [member]
Assets
Beginning balance, financial assets		1,271	2,064
Purchases, fair value measurement, assets		3,718	5,719
Sales, fair value measurement, assets		(3,606)	(5,720)
Issues, fair value measurement, assets		0	0
Settlements, fair value measurement, assets		(32)	(9)
Total gains or losses recognised in OCI, assets		0	0
Transfers into Level 3 of fair value hierarchy, assets		386	24
Transfers out of Level 3 of fair value hierarchy, assets		0	(804)
Ending balance, financial assets	1,726	1,726	1,271
From financial assets at fair value through the income statement under IAS 39 [member] | Other [member] | Recurring fair value measurement [member] | Significant unobservable inputs (Level 3) [member] | Financial assets at fair value through profit or loss, category trading [member]
Assets
Total gains and losses in the period recognised in the income statement, assets		32	12
From financial assets at fair value through the income statement under IAS 39 [member] | Other [member] | Recurring fair value measurement [member] | Significant unobservable inputs (Level 3) [member] | Financial assets at fair value through profit or loss, category other income [member]
Assets
Total gains and losses in the period recognised in the income statement, assets		(43)	(15)
Financial assets at fair value through other comprehensive income [member] | Recurring fair value measurement [member] | Significant unobservable inputs (Level 3) [member]
Assets
Beginning balance, financial assets		429	355
Purchases, fair value measurement, assets		0	399
Sales, fair value measurement, assets		(35)	(31)
Issues, fair value measurement, assets		0	0
Settlements, fair value measurement, assets		(237)	(135)
Total gains or losses recognised in OCI, assets		(4)	59
Transfers into Level 3 of fair value hierarchy, assets		0	0
Transfers out of Level 3 of fair value hierarchy, assets		0	(218)
Ending balance, financial assets	153	153	429
Financial assets at fair value through other comprehensive income [member] | Recurring fair value measurement [member] | Significant unobservable inputs (Level 3) [member] | Financial assets at fair value through profit or loss, category trading [member]
Assets
Total gains and losses in the period recognised in the income statement, assets		0	0
Financial assets at fair value through other comprehensive income [member] | Recurring fair value measurement [member] | Significant unobservable inputs (Level 3) [member] | Financial assets at fair value through profit or loss, category other income [member]
Assets
Total gains and losses in the period recognised in the income statement, assets		0	0
Financial assets at fair value through other comprehensive income [member] | Asset-backed loans [member] | Recurring fair value measurement [member] | Significant unobservable inputs (Level 3) [member]
Assets
Beginning balance, financial assets		86	0
Purchases, fair value measurement, assets		0	116
Sales, fair value measurement, assets		(35)	(30)
Issues, fair value measurement, assets		0	0
Settlements, fair value measurement, assets		0	0
Total gains or losses recognised in OCI, assets		(4)	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	47	47	86
Financial assets at fair value through other comprehensive income [member] | Asset-backed loans [member] | Recurring fair value measurement [member] | Significant unobservable inputs (Level 3) [member] | Financial assets at fair value through profit or loss, category trading [member]
Assets
Total gains and losses in the period recognised in the income statement, assets		0
Financial assets at fair value through other comprehensive income [member] | Asset-backed loans [member] | Recurring fair value measurement [member] | Significant unobservable inputs (Level 3) [member] | Financial assets at fair value through profit or loss, category other income [member]
Assets
Total gains and losses in the period recognised in the income statement, assets		0
Financial assets at fair value through other comprehensive income [member] | Asset-backed loans [member] | Recurring fair value measurement [member] | Significant unobservable inputs (Level 3) [member] | Financial liabilities at fair value through profit or loss, category trading [member]
Assets
Total gains and losses in the period recognised in the income statement, assets			0
Financial assets at fair value through other comprehensive income [member] | Asset-backed loans [member] | Recurring fair value measurement [member] | Significant unobservable inputs (Level 3) [member] | Financial liabilities at fair value through profit or loss, category other income [member]
Assets
Total gains and losses in the period recognised in the income statement, assets			0
Financial assets at fair value through other comprehensive income [member] | Non-asset-backed loans [member] | Recurring fair value measurement [member] | Significant unobservable inputs (Level 3) [member]
Assets
Beginning balance, financial assets		343
Purchases, fair value measurement, assets		0
Sales, fair value measurement, assets		0
Issues, fair value measurement, assets		0
Settlements, fair value measurement, assets		(237)
Total gains or losses recognised in OCI, assets		0
Transfers into Level 3 of fair value hierarchy, assets		0
Transfers out of Level 3 of fair value hierarchy, assets		0
Ending balance, financial assets	106	106	343
Financial assets at fair value through other comprehensive income [member] | Non-asset-backed loans [member] | Recurring fair value measurement [member] | Significant unobservable inputs (Level 3) [member] | Financial assets at fair value through profit or loss, category trading [member]
Assets
Total gains and losses in the period recognised in the income statement, assets		0
Financial assets at fair value through other comprehensive income [member] | Non-asset-backed loans [member] | Recurring fair value measurement [member] | Significant unobservable inputs (Level 3) [member] | Financial assets at fair value through profit or loss, category other income [member]
Assets
Total gains and losses in the period recognised in the income statement, assets		0
Financial assets at fair value through other comprehensive income [member] | Equity cash products [member] | Recurring fair value measurement [member] | Significant unobservable inputs (Level 3) [member]
Assets
Beginning balance, financial assets		343	0
Purchases, fair value measurement, assets		0	283
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	60
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	0	0	343
Financial assets at fair value through other comprehensive income [member] | Equity cash products [member] | Recurring fair value measurement [member] | Significant unobservable inputs (Level 3) [member] | Financial assets at fair value through profit or loss, category trading [member]
Assets
Total gains and losses in the period recognised in the income statement, assets		0	0
Financial assets at fair value through other comprehensive income [member] | Equity cash products [member] | Recurring fair value measurement [member] | Significant unobservable inputs (Level 3) [member] | Financial assets at fair value through profit or loss, category other income [member]
Assets
Total gains and losses in the period recognised in the income statement, assets		0	0
Financial assets at fair value through other comprehensive income [member] | Private equity investments [member] | Recurring fair value measurement [member] | Significant unobservable inputs (Level 3) [member]
Assets
Beginning balance, financial assets		0	2
Purchases, fair value measurement, assets			0
Sales, fair value measurement, assets			(1)
Issues, fair value measurement, assets			0
Settlements, fair value measurement, assets			0
Total gains or losses recognised in OCI, assets			(1)
Transfers into Level 3 of fair value hierarchy, assets			0
Transfers out of Level 3 of fair value hierarchy, assets			0
Ending balance, financial assets			0
Financial assets at fair value through other comprehensive income [member] | Private equity investments [member] | Recurring fair value measurement [member] | Significant unobservable inputs (Level 3) [member] | Financial assets at fair value through profit or loss, category trading [member]
Assets
Total gains and losses in the period recognised in the income statement, assets			0
Financial assets at fair value through other comprehensive income [member] | Private equity investments [member] | Recurring fair value measurement [member] | Significant unobservable inputs (Level 3) [member] | Financial assets at fair value through profit or loss, category other income [member]
Assets
Total gains and losses in the period recognised in the income statement, assets			0
Financial assets at fair value through other comprehensive income [member] | Other [member] | Recurring fair value measurement [member] | Significant unobservable inputs (Level 3) [member]
Assets
Beginning balance, financial assets		0	353
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	(135)
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	(218)
Ending balance, financial assets	£ 0	0	0
Financial assets at fair value through other comprehensive income [member] | Other [member] | Recurring fair value measurement [member] | Significant unobservable inputs (Level 3) [member] | Financial assets at fair value through profit or loss, category trading [member]
Assets
Total gains and losses in the period recognised in the income statement, assets		0	0
Financial assets at fair value through other comprehensive income [member] | Other [member] | Recurring fair value measurement [member] | Significant unobservable inputs (Level 3) [member] | Financial assets at fair value through profit or loss, category other income [member]
Assets
Total gains and losses in the period recognised in the income statement, assets		£ 0	£ 0

Fair value of financial instr_6

Fair value of financial instruments - Analysis of movements in Level 3 assets and liabilities (Narrative) (Details) - GBP (£) £ in Millions	Dec. 31, 2020	Dec. 31, 2019
Disclosure of detailed information about financial instruments [line items]
Derivative financial assets	£ 302,446	£ 229,236
Derivative financial liabilities	300,775	229,204
Significant unobservable inputs (Level 3) [member] | Recurring fair value measurement [member]
Disclosure of detailed information about financial instruments [line items]
Derivative financial assets	4,469	3,155
Derivative financial liabilities	£ 6,239	£ 3,989

Fair value of financial instr_7

Fair value of financial instruments - Unrealised gains and losses recognised during the period on Level 3 assets and liabilities held at year end (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of detailed information about financial instruments [line items]
Trading income	£ 7,029	£ 4,235	£ 4,566
Other income	31	99	114
Other comprehensive income/(oss)	(395)	(561)	248
Significant unobservable inputs (Level 3) [member]
Disclosure of detailed information about financial instruments [line items]
Trading income	214	(106)
Other income	(91)	245
Other comprehensive income/(oss)	(1)	60
Total unrealised gains and losses recognised during the period on Level 3 assets and liabilities held at period end	122	199
Significant unobservable inputs (Level 3) [member] | Investment property [member]
Disclosure of detailed information about financial instruments [line items]
Trading income	0	0
Other income	(1)	(1)
Other comprehensive income/(oss)	0	0
Total unrealised gains and losses recognised during the period on Level 3 assets and liabilities held at period end	(1)	(1)
Significant unobservable inputs (Level 3) [member] | Net derivative financial instruments [member]
Disclosure of detailed information about financial instruments [line items]
Trading income	(91)	(459)
Other income	0	0
Other comprehensive income/(oss)	0	0
Total unrealised gains and losses recognised during the period on Level 3 assets and liabilities held at period end	(91)	(459)
Trading portfolio liabilities [member] | Significant unobservable inputs (Level 3) [member]
Disclosure of detailed information about financial instruments [line items]
Trading income	0	0
Other income	0	0
Other comprehensive income/(oss)	0	0
Total unrealised gains and losses recognised during the period on Level 3 assets and liabilities held at period end	0	0
Financial liabilities designated at fair value [member] | Significant unobservable inputs (Level 3) [member]
Disclosure of detailed information about financial instruments [line items]
Trading income	20	64
Other income	(1)	0
Other comprehensive income/(oss)	0	0
Total unrealised gains and losses recognised during the period on Level 3 assets and liabilities held at period end	19	64
Trading portfolio assets [member] | Significant unobservable inputs (Level 3) [member]
Disclosure of detailed information about financial instruments [line items]
Trading income	(114)	(57)
Other income	0	0
Other comprehensive income/(oss)	0	0
Total unrealised gains and losses recognised during the period on Level 3 assets and liabilities held at period end	(114)	(57)
Trading portfolio assets [member] | Trading portfolio liabilities [member]
Disclosure of detailed information about financial instruments [line items]
Trading income	5,342	2,941	£ 3,292
Financial assets at fair value through the income statement [member] | Significant unobservable inputs (Level 3) [member]
Disclosure of detailed information about financial instruments [line items]
Trading income	399	346
Other income	(89)	246
Other comprehensive income/(oss)	0	0
Total unrealised gains and losses recognised during the period on Level 3 assets and liabilities held at period end	310	592
Financial assets at fair value through other comprehensive income [member] | Significant unobservable inputs (Level 3) [member]
Disclosure of detailed information about financial instruments [line items]
Trading income	0	0
Other income	0	0
Other comprehensive income/(oss)	(1)	60
Total unrealised gains and losses recognised during the period on Level 3 assets and liabilities held at period end	£ (1)	£ 60

Fair value of financial instr_8

Fair value of financial instruments - Significant unobservable inputs (Details) - Level 3 of fair value hierarchy [member]	Dec. 31, 2020	Dec. 31, 2019
Asset-backed securities [member] | Min [member] | Comparable pricing [member] | Price
Disclosure of detailed information about financial instruments [line items]
Significant unobservable inputs, assets and liabilities	0	0
Asset-backed securities [member] | Max [member] | Comparable pricing [member] | Price
Disclosure of detailed information about financial instruments [line items]
Significant unobservable inputs, assets and liabilities	0.0112	0.0099
Non-asset-backed loans [member] | Min [member] | Discounted cash flow [member] | Inflation forwards / Yield
Disclosure of detailed information about financial instruments [line items]
Significant unobservable inputs, assets and liabilities	0.0005	0.0006
Non-asset-backed loans [member] | Min [member] | Discounted cash flow [member] | Loan spread
Disclosure of detailed information about financial instruments [line items]
Significant unobservable inputs, assets and liabilities	0.0031	0.0031
Non-asset-backed loans [member] | Min [member] | Discounted cash flow [member] | Credit spread
Disclosure of detailed information about financial instruments [line items]
Significant unobservable inputs, assets and liabilities	0.02	0.018
Non-asset-backed loans [member] | Min [member] | Discounted cash flow [member] | Price
Disclosure of detailed information about financial instruments [line items]
Significant unobservable inputs, assets and liabilities	0	0
Non-asset-backed loans [member] | Min [member] | Comparable pricing [member] | Price
Disclosure of detailed information about financial instruments [line items]
Significant unobservable inputs, assets and liabilities	0	0
Non-asset-backed loans [member] | Max [member] | Discounted cash flow [member] | Inflation forwards / Yield
Disclosure of detailed information about financial instruments [line items]
Significant unobservable inputs, assets and liabilities	0.0008	0.0012
Non-asset-backed loans [member] | Max [member] | Discounted cash flow [member] | Loan spread
Disclosure of detailed information about financial instruments [line items]
Significant unobservable inputs, assets and liabilities	0.1518	0.1884
Non-asset-backed loans [member] | Max [member] | Discounted cash flow [member] | Credit spread
Disclosure of detailed information about financial instruments [line items]
Significant unobservable inputs, assets and liabilities	0.03	0.1223
Non-asset-backed loans [member] | Max [member] | Discounted cash flow [member] | Price
Disclosure of detailed information about financial instruments [line items]
Significant unobservable inputs, assets and liabilities	0.0104	0.0133
Non-asset-backed loans [member] | Max [member] | Comparable pricing [member] | Price
Disclosure of detailed information about financial instruments [line items]
Significant unobservable inputs, assets and liabilities	0.0137	0.0123
Private equity investments [member] | Min [member] | Discounted cash flow [member] | Discount margin
Disclosure of detailed information about financial instruments [line items]
Significant unobservable inputs, assets and liabilities	0.0001	0.0008
Private equity investments [member] | Min [member] | EBITA [member] | EBITA multiple
Disclosure of detailed information about financial instruments [line items]
Significant unobservable inputs, assets and liabilities	0.0014	0.0005
Private equity investments [member] | Min [member] | Earnings multiple | Earnings multiple
Disclosure of detailed information about financial instruments [line items]
Significant unobservable inputs, assets and liabilities	0.0003	0
Private equity investments [member] | Max [member] | Discounted cash flow [member] | Discount margin
Disclosure of detailed information about financial instruments [line items]
Significant unobservable inputs, assets and liabilities	0.001	0.001
Private equity investments [member] | Max [member] | EBITA [member] | EBITA multiple
Disclosure of detailed information about financial instruments [line items]
Significant unobservable inputs, assets and liabilities	0.0016	0.0016
Private equity investments [member] | Max [member] | Earnings multiple | Earnings multiple
Disclosure of detailed information about financial instruments [line items]
Significant unobservable inputs, assets and liabilities	0.0028	0.0027
Corporate debt [member] | Min [member] | Comparable pricing [member] | Price
Disclosure of detailed information about financial instruments [line items]
Significant unobservable inputs, assets and liabilities	0	0
Corporate debt [member] | Max [member] | Comparable pricing [member] | Price
Disclosure of detailed information about financial instruments [line items]
Significant unobservable inputs, assets and liabilities	0.0127	0.01
Other [member] | Min [member] | Discounted cash flow [member] | Credit spread
Disclosure of detailed information about financial instruments [line items]
Significant unobservable inputs, assets and liabilities	0.0146	0.0126
Other [member] | Max [member] | Discounted cash flow [member] | Credit spread
Disclosure of detailed information about financial instruments [line items]
Significant unobservable inputs, assets and liabilities	0.0483	0.0649
Interest rate derivatives [member] | Min [member] | Discounted cash flow [member] | Inflation forwards / Yield
Disclosure of detailed information about financial instruments [line items]
Significant unobservable inputs, assets and liabilities	0.0001	0.0001
Interest rate derivatives [member] | Min [member] | Discounted cash flow [member] | Credit spread
Disclosure of detailed information about financial instruments [line items]
Significant unobservable inputs, assets and liabilities	0.0017	0.0041
Interest rate derivatives [member] | Min [member] | Comparable pricing [member] | Price
Disclosure of detailed information about financial instruments [line items]
Significant unobservable inputs, assets and liabilities	0	0
Interest rate derivatives [member] | Min [member] | Comparable pricing [member] | Volatility
Disclosure of detailed information about financial instruments [line items]
Significant unobservable inputs, assets and liabilities	0.0031	0.0047
Interest rate derivatives [member] | Min [member] | Comparable pricing [member] | Interest rate volatility
Disclosure of detailed information about financial instruments [line items]
Significant unobservable inputs, assets and liabilities	0.0006	0.0008
Interest rate derivatives [member] | Min [member] | Option model [member] | FX correlation
Disclosure of detailed information about financial instruments [line items]
Significant unobservable inputs, assets and liabilities	(0.003)	(0.003)
Interest rate derivatives [member] | Min [member] | Option model [member] | Correlation
Disclosure of detailed information about financial instruments [line items]
Significant unobservable inputs, assets and liabilities	(0.002)	(0.003)
Interest rate derivatives [member] | Max [member] | Discounted cash flow [member] | Inflation forwards / Yield
Disclosure of detailed information about financial instruments [line items]
Significant unobservable inputs, assets and liabilities	0.0003	0.0003
Interest rate derivatives [member] | Max [member] | Discounted cash flow [member] | Credit spread
Disclosure of detailed information about financial instruments [line items]
Significant unobservable inputs, assets and liabilities	0.1831	0.162
Interest rate derivatives [member] | Max [member] | Comparable pricing [member] | Price
Disclosure of detailed information about financial instruments [line items]
Significant unobservable inputs, assets and liabilities	0.0084	0.0037
Interest rate derivatives [member] | Max [member] | Comparable pricing [member] | Volatility
Disclosure of detailed information about financial instruments [line items]
Significant unobservable inputs, assets and liabilities	0.0227	0.019
Interest rate derivatives [member] | Max [member] | Comparable pricing [member] | Interest rate volatility
Disclosure of detailed information about financial instruments [line items]
Significant unobservable inputs, assets and liabilities	0.0489	0.0431
Interest rate derivatives [member] | Max [member] | Option model [member] | FX correlation
Disclosure of detailed information about financial instruments [line items]
Significant unobservable inputs, assets and liabilities	0.0078	0.0078
Interest rate derivatives [member] | Max [member] | Option model [member] | Correlation
Disclosure of detailed information about financial instruments [line items]
Significant unobservable inputs, assets and liabilities	0.0099	0.01
Credit derivatives [member] | Min [member] | Discounted cash flow [member] | Credit spread
Disclosure of detailed information about financial instruments [line items]
Significant unobservable inputs, assets and liabilities	0.0005	0.0072
Credit derivatives [member] | Min [member] | Comparable pricing [member] | Price
Disclosure of detailed information about financial instruments [line items]
Significant unobservable inputs, assets and liabilities	0	0
Credit derivatives [member] | Max [member] | Discounted cash flow [member] | Credit spread
Disclosure of detailed information about financial instruments [line items]
Significant unobservable inputs, assets and liabilities	0.048	0.02
Credit derivatives [member] | Max [member] | Comparable pricing [member] | Price
Disclosure of detailed information about financial instruments [line items]
Significant unobservable inputs, assets and liabilities	0.01	0.0155
Equity derivatives [member] | Min [member] | Discounted cash flow [member] | Discount margin
Disclosure of detailed information about financial instruments [line items]
Significant unobservable inputs, assets and liabilities	(0.0225)	(0.05)
Equity derivatives [member] | Min [member] | Option model [member] | Volatility
Disclosure of detailed information about financial instruments [line items]
Significant unobservable inputs, assets and liabilities	0.0001	0.0001
Equity derivatives [member] | Min [member] | Option model [member] | Correlation
Disclosure of detailed information about financial instruments [line items]
Significant unobservable inputs, assets and liabilities	(0.0045)	(0.002)
Equity derivatives [member] | Max [member] | Discounted cash flow [member] | Discount margin
Disclosure of detailed information about financial instruments [line items]
Significant unobservable inputs, assets and liabilities	0.3	0.11
Equity derivatives [member] | Max [member] | Option model [member] | Volatility
Disclosure of detailed information about financial instruments [line items]
Significant unobservable inputs, assets and liabilities	0.011	0.02
Equity derivatives [member] | Max [member] | Option model [member] | Correlation
Disclosure of detailed information about financial instruments [line items]
Significant unobservable inputs, assets and liabilities	0.01	0.01

Fair value of financial instr_9

Fair value of financial instruments - Significant unobservable inputs (Narrative) (Details) - Level 3 of fair value hierarchy [member] - Derivative credit valuation adjustments [member] - Credit spread	Dec. 31, 2020	Dec. 31, 2019
Max [member]
Disclosure of detailed information about financial instruments [line items]
Significant unobservable inputs, assets and liabilities	0.1831	0.162
Min [member]
Disclosure of detailed information about financial instruments [line items]
Significant unobservable inputs, assets and liabilities	0.0017	0.0041

Fair value of financial inst_10

Fair value of financial instruments - Sensitivity analysis of valuations using unobservable inputs (Details) - Significant unobservable inputs (Level 3) [member] - Derivatives [member] - Recurring fair value measurement [member] - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Favourable changes [member]
Disclosure of detailed information about financial instruments [line items]
Favorable changes, Income statement	£ 903	£ 790
Favourable changes, Equity	3	8
Unfavourable changes [member]
Disclosure of detailed information about financial instruments [line items]
Unfavourable changes, Income Statement	1,171	1,219
Unfavourable changes, Equity	3	8
Corporate debt [member] | Favourable changes [member]
Disclosure of detailed information about financial instruments [line items]
Favorable changes, Income statement	16	11
Favourable changes, Equity	0	0
Corporate debt [member] | Unfavourable changes [member]
Disclosure of detailed information about financial instruments [line items]
Favorable changes, Income statement	(14)	(16)
Favourable changes, Equity	0	0
Non-asset-backed loans [member] | Favourable changes [member]
Disclosure of detailed information about financial instruments [line items]
Favorable changes, Income statement	190	214
Favourable changes, Equity	3	8
Non-asset-backed loans [member] | Unfavourable changes [member]
Disclosure of detailed information about financial instruments [line items]
Favorable changes, Income statement	(409)	(492)
Favourable changes, Equity	(3)	(8)
Equity cash products [member] | Favourable changes [member]
Disclosure of detailed information about financial instruments [line items]
Favorable changes, Income statement	158	123
Favourable changes, Equity	0	0
Equity cash products [member] | Unfavourable changes [member]
Disclosure of detailed information about financial instruments [line items]
Favorable changes, Income statement	(141)	(175)
Favourable changes, Equity	0	0
Private equity investments [member] | Favourable changes [member]
Disclosure of detailed information about financial instruments [line items]
Favorable changes, Income statement	199	205
Favourable changes, Equity	0	0
Private equity investments [member] | Unfavourable changes [member]
Disclosure of detailed information about financial instruments [line items]
Favorable changes, Income statement	(227)	(235)
Favourable changes, Equity	0	0
Other [member] | Favourable changes [member]
Disclosure of detailed information about financial instruments [line items]
Favorable changes, Income statement	21	1
Favourable changes, Equity	0	0
Other [member] | Unfavourable changes [member]
Disclosure of detailed information about financial instruments [line items]
Favorable changes, Income statement	(21)	(1)
Favourable changes, Equity	0	0
Interest rate derivatives [member] | Favourable changes [member]
Disclosure of detailed information about financial instruments [line items]
Favorable changes, Income statement	82	44
Favourable changes, Equity	0	0
Interest rate derivatives [member] | Unfavourable changes [member]
Disclosure of detailed information about financial instruments [line items]
Favorable changes, Income statement	(123)	(127)
Favourable changes, Equity	0	0
Foreign exchange derivatives [member] | Favourable changes [member]
Disclosure of detailed information about financial instruments [line items]
Favorable changes, Income statement	6	5
Favourable changes, Equity	0	0
Foreign exchange derivatives [member] | Unfavourable changes [member]
Disclosure of detailed information about financial instruments [line items]
Favorable changes, Income statement	(11)	(7)
Favourable changes, Equity	0	0
Credit derivatives [member] | Favourable changes [member]
Disclosure of detailed information about financial instruments [line items]
Favorable changes, Income statement	55	73
Favourable changes, Equity	0	0
Credit derivatives [member] | Unfavourable changes [member]
Disclosure of detailed information about financial instruments [line items]
Favorable changes, Income statement	(44)	(47)
Favourable changes, Equity	0	0
Equity derivatives [member] | Favourable changes [member]
Disclosure of detailed information about financial instruments [line items]
Favorable changes, Income statement	174	114
Favourable changes, Equity	0	0
Equity derivatives [member] | Unfavourable changes [member]
Disclosure of detailed information about financial instruments [line items]
Favorable changes, Income statement	(179)	(119)
Favourable changes, Equity	0	0
Commodity derivatives [member] | Favourable changes [member]
Disclosure of detailed information about financial instruments [line items]
Favorable changes, Income statement	2	0
Favourable changes, Equity	0	0
Commodity derivatives [member] | Unfavourable changes [member]
Disclosure of detailed information about financial instruments [line items]
Favorable changes, Income statement	(2)	0
Favourable changes, Equity	£ 0	£ 0

Fair value of financial inst_11

Fair value of financial instruments - Fair value adjustments (Details) - Level 3 of fair value hierarchy [member] - GBP (£) £ in Millions	Dec. 31, 2020	Dec. 31, 2019
Exit price adjustments derived from market bid-offer spreads [member]
Disclosure of detailed information about financial instruments [line items]
Fair value adjustments	£ (493)	£ (429)
Uncollateralised derivative funding [member]
Disclosure of detailed information about financial instruments [line items]
Fair value adjustments	(115)	(57)
Derivative credit valuation adjustments [member]
Disclosure of detailed information about financial instruments [line items]
Fair value adjustments	(268)	(135)
Derivative debit valuation adjustments [member]
Disclosure of detailed information about financial instruments [line items]
Fair value adjustments	£ 113	£ 155

Fair value of financial inst_12

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	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Financial assets [abstract]
Loans and advances at amortised cost	£ 342,632	£ 339,115
Reverse repurchase agreements and other similar secured lending	9,031	3,379
Financial liabilities [abstract]
Repurchase agreements and other similar secured borrowing	(14,174)	(14,517)
Debt securities in issue	(75,796)	(76,369)
Subordinated liabilities	(16,341)	(18,156)	£ (20,559)
Level 1 of fair value hierarchy [member]
Financial assets [abstract]
Loans and advances at amortised cost	8,824	11,145
Reverse repurchase agreements and other similar secured lending	0	0
Financial liabilities [abstract]
Financial liabilities at amortised cost	(396,124)	(327,329)
Repurchase agreements and other similar secured borrowing	0	0
Debt securities in issue	0	0
Subordinated liabilities	0	0
Level 2 of fair value hierarchy [member]
Financial assets [abstract]
Loans and advances at amortised cost	81,322	73,378
Reverse repurchase agreements and other similar secured lending	9,031	3,379
Financial liabilities [abstract]
Financial liabilities at amortised cost	(82,874)	(78,659)
Repurchase agreements and other similar secured borrowing	(14,174)	(14,517)
Debt securities in issue	(75,957)	(76,142)
Subordinated liabilities	(16,918)	(18,863)
Level 3 of fair value hierarchy [member]
Financial assets [abstract]
Loans and advances at amortised cost	250,370	250,985
Reverse repurchase agreements and other similar secured lending	0	0
Financial liabilities [abstract]
Financial liabilities at amortised cost	(2,108)	(9,819)
Repurchase agreements and other similar secured borrowing	0	0
Debt securities in issue	(1,856)	(2,370)
Subordinated liabilities	0	0
Not held at fair value [member]
Financial assets [abstract]
Loans and advances at amortised cost	340,516	337,510
Reverse repurchase agreements and other similar secured lending	9,031	3,379
Financial liabilities [abstract]
Financial liabilities at amortised cost	(481,106)	(415,807)
Repurchase agreements and other similar secured borrowing	(14,174)	(14,517)
Debt securities in issue	(77,813)	(78,512)
Subordinated liabilities	(16,918)	(18,863)
Carrying amount [member]
Financial assets [abstract]
Loans and advances at amortised cost	342,632	339,115
Reverse repurchase agreements and other similar secured lending	9,031	3,379
Financial liabilities [abstract]
Financial liabilities at amortised cost	(481,036)	(415,787)
Repurchase agreements and other similar secured borrowing	(14,174)	(14,517)
Debt securities in issue	(75,796)	(76,369)
Subordinated liabilities	£ (16,341)	£ (18,156)

Fair value of financial inst_13

Fair value of financial instruments (Narrative) (Details) £ in Millions	12 Months Ended
	Dec. 31, 2020GBP (£)	Dec. 31, 2019GBP (£)
Disclosure of detailed information about financial instruments [line items]
Deposits at amortised cost	£ 481,036	£ 415,787
Brokered certificates of deposit [member]
Disclosure of detailed information about financial instruments [line items]
Description of existence of third-party credit enhancement	Structured and brokered certificates of deposit issued by Barclays are insured up to $250,000 per depositor by the Federal Deposit Insurance Corporation (FDIC) in the US. The FDIC is funded by premiums that Barclays and other banks pay for deposit insurance coverage.
Description of whether third-party credit enhancement is reflected in fair value measurement	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.
Deposits at amortised cost	£ 1,494	3,218
Exit price adjustments derived from market bid-offer spreads [member] | Level 3 of fair value hierarchy [member]
Disclosure of detailed information about financial instruments [line items]
Increase (decrease) in fair value adjustments of derivatives	(64)
Fair value adjustments	493	429
Uncollateralised derivative funding [member] | Level 3 of fair value hierarchy [member]
Disclosure of detailed information about financial instruments [line items]
Increase (decrease) in fair value adjustments of derivatives	(58)
Fair value adjustments	115	57
Uncollateralised derivative funding [member] | Level 3 of fair value hierarchy [member] | Scaling factor [member]
Disclosure of detailed information about financial instruments [line items]
Increase (decrease) in fair value adjustments of derivatives	115	170
Derivative credit valuation adjustments [member] | Level 3 of fair value hierarchy [member]
Disclosure of detailed information about financial instruments [line items]
Increase (decrease) in fair value adjustments of derivatives	(133)
Fair value adjustments	268	135
Derivative credit valuation adjustments [member] | Level 3 of fair value hierarchy [member] | Recovery assumptions in CDS levels [member]
Disclosure of detailed information about financial instruments [line items]
Potential increase (decrease) in fair value adjustments of derivatives	32	36
Derivative debit valuation adjustments [member] | Level 3 of fair value hierarchy [member]
Disclosure of detailed information about financial instruments [line items]
Increase (decrease) in fair value adjustments of derivatives	42
Fair value adjustments	(113)	(155)
Max [member] | Level 3 of fair value hierarchy [member]
Disclosure of detailed information about financial instruments [line items]
Favorable changes	906	798
Unfavorable changes	£ 1,174	£ 1,227
Education, Social Housing, and Local Authority Porfolio [member] | Level 3 of fair value hierarchy [member]
Disclosure of detailed information about financial instruments [line items]
Percentage of fixed rate loan notional amount concentrated towards bottom of range	97.00%
Education, Social Housing, and Local Authority Porfolio [member] | Min [member] | Level 3 of fair value hierarchy [member] | Loan spread
Disclosure of detailed information about financial instruments [line items]
Significant unobservable inputs, assets and liabilities	0.0031	0.0031
Education, Social Housing, and Local Authority Porfolio [member] | Max [member] | Level 3 of fair value hierarchy [member]
Disclosure of detailed information about financial instruments [line items]
Significant unobservable inputs, assets and liabilities	0.02	0.02
Education, Social Housing, and Local Authority Porfolio [member] | Max [member] | Level 3 of fair value hierarchy [member] | Loan spread
Disclosure of detailed information about financial instruments [line items]
Significant unobservable inputs, assets and liabilities	0.1518	0.1884
Financial instruments at fair value, category [member] | Level 3 of fair value hierarchy [member]
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	£ 116	£ 113
Additions, aggregate difference between fair value at initial recognition and transaction price yet to be recognised in profit or loss	27	41
Amortisation and releases, aggregate difference between fair value at initial recognition and transaction price yet to be recognised in profit or loss	24	69
Financial instruments at amortised cost, category [member] | Level 3 of fair value hierarchy [member]
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	247	255
Additions, aggregate difference between fair value at initial recognition and transaction price yet to be recognised in profit or loss	6	7
Amortisation and releases, aggregate difference between fair value at initial recognition and transaction price yet to be recognised in profit or loss	£ 14	£ 14

Offsetting financial assets a_3

Offsetting financial assets and financial liabilities (Details) - GBP (£) £ in Millions	Dec. 31, 2020	Dec. 31, 2019
Disclosure of offsetting of financial assets [line items]
Gross amounts	£ 790,783	£ 634,480
Amounts offset	(350,703)	(308,567)
Net amounts reported on the balance sheet	440,080	325,913
Financial instruments	(233,080)	(175,998)
Financial collateral	(189,416)	(137,175)
Net amount	17,584	12,740
Amounts not subject to enforceable netting arrangements	9,013	3,589
Balance sheet total	449,093	329,502
Disclosure of offsetting of financial liabilities [line items]
Gross amounts	(810,855)	(661,350)
Amounts offset	348,380	307,201
Net amounts reported on the balance sheet	(462,475)	(354,149)
Financial instruments	233,080	175,998
Financial collateral	217,318	168,690
Net amount	(12,077)	(9,461)
Amounts not subject to enforceable netting arrangements	(29,845)	(18,119)
Balance sheet total	(492,320)	(372,268)
Derivatives [member]
Disclosure of offsetting of financial liabilities [line items]
Gross amounts	(333,943)	(255,269)
Amounts offset	41,982	31,180
Net amounts reported on the balance sheet	(291,961)	(224,089)
Financial instruments	233,080	175,998
Financial collateral	46,804	38,632
Net amount	(12,077)	(9,459)
Amounts not subject to enforceable netting arrangements	(8,814)	(5,115)
Balance sheet total	(300,775)	(229,204)
Repurchase agreements and other similar secured borrowing [member]
Disclosure of offsetting of financial liabilities [line items]
Gross amounts	(476,912)	(406,081)
Amounts offset	306,398	276,021
Net amounts reported on the balance sheet	(170,514)	(130,060)
Financial instruments	0	0
Financial collateral	170,514	130,058
Net amount	0	(2)
Amounts not subject to enforceable netting arrangements	(21,031)	(13,004)
Balance sheet total	(191,545)	(143,064)
Derivatives [member]
Disclosure of offsetting of financial assets [line items]
Gross amounts	342,649	260,206
Amounts offset	(44,305)	(32,546)
Net amounts reported on the balance sheet	298,344	227,660
Financial instruments	(233,080)	(175,998)
Financial collateral	(48,064)	(38,922)
Net amount	17,200	12,740
Amounts not subject to enforceable netting arrangements	4,102	1,576
Balance sheet total	302,446	229,236
Reverse repurchase agreements and other similar secured lending [member]
Disclosure of offsetting of financial assets [line items]
Gross amounts	448,134	374,274
Amounts offset	(306,398)	(276,021)
Net amounts reported on the balance sheet	141,736	98,253
Financial instruments	0	0
Financial collateral	(141,352)	(98,253)
Net amount	384	0
Amounts not subject to enforceable netting arrangements	4,911	2,013
Balance sheet total	£ 146,647	£ 100,266

Offsetting financial assets a_4

Offsetting financial assets and financial liabilities - Financial assets and liabilities (Narrative) (Details) - GBP (£) £ in Millions	Dec. 31, 2020	Dec. 31, 2019
Disclosure of offsetting of financial assets [line items]
Financial collateral	£ 189,416	£ 137,175
Amounts offset	350,703	308,567
Maximum Exposure	449,093	329,502
Disclosure of offsetting of financial liabilities [line items]
Financial collateral	217,318	168,690
Amounts offset	348,380	307,201
Derivative liability expsoure	492,320	372,268
Settlements assets liabilities offset amounts	18,143	14,079
Derivatives [member]
Disclosure of offsetting of financial liabilities [line items]
Financial collateral	46,804	38,632
Cash collateral pledged	42,730	35,712
Non-cash assets pledged as collateral	4,074	2,920
Amounts offset	41,982	31,180
Derivative liability expsoure	300,775	229,204
Derivatives [member] | Cash collateral netted [member]
Disclosure of offsetting of financial liabilities [line items]
Amounts offset	7,313	5,465
Repurchase agreements and other similar secured borrowing [member]
Disclosure of offsetting of financial liabilities [line items]
Financial collateral	170,514	130,058
Amounts offset	306,398	276,021
Derivative liability expsoure	191,545	143,064
Repurchase agreements and other similar secured borrowing [member] | Financial liabilities at fair value, class [member]
Disclosure of offsetting of financial liabilities [line items]
Derivative liability expsoure	177,371	128,547
Repurchase agreements and other similar secured borrowing [member] | Financial liabilities at amortised cost [member]
Disclosure of offsetting of financial liabilities [line items]
Derivative liability expsoure	14,174	14,517
Derivatives [member]
Disclosure of offsetting of financial assets [line items]
Financial collateral	48,064	38,922
Cash collateral	43,291	33,411
Non-cash collateral	4,773	5,511
Amounts offset	44,305	32,546
Maximum Exposure	302,446	229,236
Derivatives [member] | Cash collateral netted [member]
Disclosure of offsetting of financial assets [line items]
Amounts offset	4,990	4,099
Reverse repurchase agreements and other similar secured lending [member]
Disclosure of offsetting of financial assets [line items]
Financial collateral	141,352	98,253
Amounts offset	306,398	276,021
Maximum Exposure	146,647	100,266
Reverse repurchase agreements and other similar secured lending [member] | Financial assets designated at fair value [member]
Disclosure of offsetting of financial assets [line items]
Maximum Exposure	137,616	96,887
Reverse repurchase agreements and other similar secured lending [member] | Financial assets at amortised cost [member]
Disclosure of offsetting of financial assets [line items]
Maximum Exposure	£ 9,031	£ 3,379

Loans and advances and deposi_2

Loans and advances and deposits at amortised cost (Details) - GBP (£) £ in Millions	Dec. 31, 2020	Dec. 31, 2019
Deposits [member]
Disclosure of detailed information about financial instruments [line items]
Financial liabilities at amortised cost	£ 481,036	£ 415,787
Deposits [member] | Banks [member]
Disclosure of detailed information about financial instruments [line items]
Financial liabilities at amortised cost	17,343	15,402
Deposits [member] | Customers [member]
Disclosure of detailed information about financial instruments [line items]
Financial liabilities at amortised cost	463,693	400,385
Loans and advances [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets at amortised cost	342,632	339,115
Loans and advances [member] | Banks [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets at amortised cost	8,900	9,624
Loans and advances [member] | Customers [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets at amortised cost	309,927	311,739
Debt securities [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets at amortised cost	£ 23,805	£ 17,752

Property, plant and equipment_2

Property, plant and equipment (Narrative) (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of detailed information about property, plant and equipment [line items]
Other income	£ 31	£ 99	£ 114
Property rentals [member]
Disclosure of detailed information about property, plant and equipment [line items]
Other income	£ 11	£ 22
Freehold land [member]
Disclosure of detailed information about property, plant and equipment [line items]
Annual rates in calculating depreciation	Not depreciated
Freehold buildings and long-leasehold property (more than 50 years to run) [member] | Min [member] | More than 50 years to run [member]
Disclosure of detailed information about property, plant and equipment [line items]
Depreciation rates, property, plant and equipment	2.00%
Freehold buildings and long-leasehold property (more than 50 years to run) [member] | Max [member] | More than 50 years to run [member]
Disclosure of detailed information about property, plant and equipment [line items]
Depreciation rates, property, plant and equipment	3.30%
Leasehold property over the remaining life of the lease (less than 50 years to run) [member] | Less than 50 years to run [member]
Disclosure of detailed information about property, plant and equipment [line items]
Annual rates in calculating depreciation	Over the remaining life of the lease
Costs of adaptation of freehold and leasehold property [member] | Min [member]
Disclosure of detailed information about property, plant and equipment [line items]
Depreciation rates, property, plant and equipment	6.00%
Costs of adaptation of freehold and leasehold property [member] | Max [member]
Disclosure of detailed information about property, plant and equipment [line items]
Depreciation rates, property, plant and equipment	10.00%
Equipment installed in freehold and leasehold property [member] | Min [member]
Disclosure of detailed information about property, plant and equipment [line items]
Depreciation rates, property, plant and equipment	6.00%
Equipment installed in freehold and leasehold property [member] | Max [member]
Disclosure of detailed information about property, plant and equipment [line items]
Depreciation rates, property, plant and equipment	10.00%
Computers and similar equipment [member] | Min [member]
Disclosure of detailed information about property, plant and equipment [line items]
Depreciation rates, property, plant and equipment	17.00%
Computers and similar equipment [member] | Max [member]
Disclosure of detailed information about property, plant and equipment [line items]
Depreciation rates, property, plant and equipment	33.00%
Fixtures and fittings and other equipment [member] | Min [member]
Disclosure of detailed information about property, plant and equipment [line items]
Depreciation rates, property, plant and equipment	9.00%
Fixtures and fittings and other equipment [member] | Max [member]
Disclosure of detailed information about property, plant and equipment [line items]
Depreciation rates, property, plant and equipment	20.00%

Property, plant and equipment_3

Property, plant and equipment (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of detailed information about property, plant and equipment [line items]
Beginning balance, Property, plant and equipment	£ 4,215
Ending balance, Property, plant and equipment	4,036	£ 4,215
Cost [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning balance, Property, plant and equipment	8,763	8,406
Additions	524	814
Disposals	(211)	(334)
Exchange and other movements	(39)	(123)
Ending balance, Property, plant and equipment	9,037	8,763
Accumulated depreciation and impairment [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning balance, Property, plant and equipment	(4,548)	(4,227)
Depreciation charge	(641)	(633)
Impairment	(42)	(14)
Disposals	176	261
Exchange and other movements	54	65
Ending balance, Property, plant and equipment	(5,001)	(4,548)
Property [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning balance, Property, plant and equipment	2,037
Ending balance, Property, plant and equipment	1,989	2,037
Property [member] | Cost [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning balance, Property, plant and equipment	3,938	3,684
Additions	193	377
Disposals	(96)	(73)
Exchange and other movements	(33)	(50)
Ending balance, Property, plant and equipment	4,002	3,938
Property [member] | Accumulated depreciation and impairment [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning balance, Property, plant and equipment	(1,901)	(1,792)
Depreciation charge	(187)	(178)
Impairment	(25)	(11)
Disposals	82	56
Exchange and other movements	18	24
Ending balance, Property, plant and equipment	(2,013)	(1,901)
Equipment [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning balance, Property, plant and equipment	671
Ending balance, Property, plant and equipment	670	671
Equipment [member] | Cost [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning balance, Property, plant and equipment	2,977	2,956
Additions	246	337
Disposals	(100)	(251)
Exchange and other movements	(41)	(65)
Ending balance, Property, plant and equipment	3,082	2,977
Equipment [member] | Accumulated depreciation and impairment [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning balance, Property, plant and equipment	(2,306)	(2,322)
Depreciation charge	(223)	(229)
Impairment	(2)	(1)
Disposals	92	205
Exchange and other movements	27	41
Ending balance, Property, plant and equipment	(2,412)	(2,306)
Leased assets [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning balance, Property, plant and equipment	0
Ending balance, Property, plant and equipment	0	0
Leased assets [member] | Cost [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning balance, Property, plant and equipment	9	9
Additions	0	0
Disposals	0	0
Exchange and other movements	0	0
Ending balance, Property, plant and equipment	9	9
Leased assets [member] | Accumulated depreciation and impairment [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning balance, Property, plant and equipment	(9)	(9)
Depreciation charge	0	0
Impairment	0	0
Disposals	0	0
Exchange and other movements	0	0
Ending balance, Property, plant and equipment	(9)	(9)
Investment property [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning balance, Property, plant and equipment	13
Ending balance, Property, plant and equipment	10	13
Investment property [member] | Cost [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning balance, Property, plant and equipment	13	9
Additions	0	5
Disposals	(1)	0
Exchange and other movements	(2)	(1)
Ending balance, Property, plant and equipment	10	13
Investment property [member] | Accumulated depreciation and impairment [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning balance, Property, plant and equipment	0	0
Depreciation charge	0	0
Impairment	0	0
Disposals	0	0
Exchange and other movements	0	0
Ending balance, Property, plant and equipment	0	0
Right of use assets [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning balance, Property, plant and equipment	1,494
Ending balance, Property, plant and equipment	1,367	1,494
Right of use assets [member] | Cost [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning balance, Property, plant and equipment	1,826	1,748
Additions	85	95
Disposals	(14)	(10)
Exchange and other movements	37	(7)
Ending balance, Property, plant and equipment	1,934	1,826
Right of use assets [member] | Accumulated depreciation and impairment [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning balance, Property, plant and equipment	(332)	(104)
Depreciation charge	(231)	(226)
Impairment	(15)	(2)
Disposals	2	0
Exchange and other movements	9	0
Ending balance, Property, plant and equipment	£ (567)	£ (332)

Leases - Maturity analysis of l

Leases - Maturity analysis of lease receivables (Details) - GBP (£) £ in Millions	Dec. 31, 2020	Dec. 31, 2019
Disclosure of maturity analysis of finance lease payments receivable [line items]
Gross investment in finance lease receivables	£ 1,245	£ 3,497
Future finance income	(63)	(293)
Present value of minimum lease payments receivable	1,182	3,204
Un-guaranteed residual values	225	259
Not later than one year [member]
Disclosure of maturity analysis of finance lease payments receivable [line items]
Gross investment in finance lease receivables	535	1,403
Future finance income	(26)	(115)
Present value of minimum lease payments receivable	509	1,288
Un-guaranteed residual values	70	77
One to two years [member]
Disclosure of maturity analysis of finance lease payments receivable [line items]
Gross investment in finance lease receivables	312	909
Future finance income	(15)	(76)
Present value of minimum lease payments receivable	297	833
Un-guaranteed residual values	45	53
Two to three years [member]
Disclosure of maturity analysis of finance lease payments receivable [line items]
Gross investment in finance lease receivables	215	593
Future finance income	(12)	(49)
Present value of minimum lease payments receivable	203	544
Un-guaranteed residual values	52	45
Three to four years [member]
Disclosure of maturity analysis of finance lease payments receivable [line items]
Gross investment in finance lease receivables	107	354
Future finance income	(6)	(28)
Present value of minimum lease payments receivable	101	326
Un-guaranteed residual values	27	43
Four to five years [member]
Disclosure of maturity analysis of finance lease payments receivable [line items]
Gross investment in finance lease receivables	52	123
Future finance income	(3)	(8)
Present value of minimum lease payments receivable	49	115
Un-guaranteed residual values	18	19
Over five years [member]
Disclosure of maturity analysis of finance lease payments receivable [line items]
Gross investment in finance lease receivables	24	115
Future finance income	(1)	(17)
Present value of minimum lease payments receivable	23	98
Un-guaranteed residual values	£ 13	£ 22

Leases - Finance lease income (

Leases - Finance lease income (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Finance leases
Finance income from net investment in lease	£ 55	£ 141
(Loss)/Profit on sales	£ (25)	£ 6

Leases - Lease liabilities (Det

Leases - Lease liabilities (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
21. Leases
Lease liabilities, Beginning Balance	£ 1,563	£ 1,696
Interest expense	70	76
New leases	85	94
Disposals	(15)	19
Cash payments	(306)	(289)
Exchange and other movements	47	5
Lease liabilities, Ending Balance	£ 1,444	£ 1,563

Leases - Lease liability maturi

Leases - Lease liability maturity analysis (Details) - GBP (£) £ in Millions	Dec. 31, 2020	Dec. 31, 2019
Disclosure of maturity analysis for non-derivative financial liabilities [line items]
Total undiscounted lease liabilities	£ 1,817	£ 1,982
Not later than one year [member]
Disclosure of maturity analysis for non-derivative financial liabilities [line items]
Total undiscounted lease liabilities	255	296
One to two years [member]
Disclosure of maturity analysis for non-derivative financial liabilities [line items]
Total undiscounted lease liabilities	221	252
Two to three years [member]
Disclosure of maturity analysis for non-derivative financial liabilities [line items]
Total undiscounted lease liabilities	198	208
Three to four years [member]
Disclosure of maturity analysis for non-derivative financial liabilities [line items]
Total undiscounted lease liabilities	176	186
Four to five years [member]
Disclosure of maturity analysis for non-derivative financial liabilities [line items]
Total undiscounted lease liabilities	162	165
Later than five years and not later than ten years [member]
Disclosure of maturity analysis for non-derivative financial liabilities [line items]
Total undiscounted lease liabilities	557	565
Greater than ten years [member]
Disclosure of maturity analysis for non-derivative financial liabilities [line items]
Total undiscounted lease liabilities	£ 248	£ 310

Leases (Narrative) (Details)

Leases (Narrative) (Details) £ in Millions	12 Months Ended
	Dec. 31, 2020GBP (£)leases	Dec. 31, 2019GBP (£)leases
As a Lessee
Description of line items in statement of financial position which include right-of-use assets	the ROU assets are included within property, plant and equipment
Description of line items in statement of financial position which include lease liabilities	the lease liabilities are included within other liabilities
Statement that lessee accounts for short-term leases using recognition exemption	The Group applies the recognition exemption in IFRS 16 for leases with a term not exceeding 12 months.
Information about nature of lessee's leasing activities	As a Lessee The Group leases various offices, branches and other premises under non-cancellable lease arrangements to meet its operational business requirements. In some instances, Barclays will sublease property to third parties when it is no longer needed to meet business requirements. Currently, Barclays does not have any material subleasing arrangements.
Number of leases with variable lease payment terms | leases	809	939
Number of leases | leases	1,329	1,467
Expense relating to short-term leases for which recognition exemption has been used	£ 4	£ 14
Information about lessee's exposure arising from variable lease payments	Variable lease payments: This variability will typically arise from either inflation index instruments or market based pricing adjustments. Currently, Barclays has 809 (2019: 939) leases out of the total 1,329 (2019: 1,467) leases which have variable lease payment terms based on market based pricing adjustments. Of the gross cash flows identified above, £1,096m (2019: £1,526m) is attributable to leases with some degree of variability predominately linked to market based pricing adjustments.
Expense relating to variable lease payments not included in measurement of lease liabilities	£ 1,096	1,526
Information about lessee's exposure arising from extension options and termination options	Extension and termination options: The table above represents Barclays best estimate of future cash out flows for leases, including assumptions regarding the exercising of contractual extension and termination options. The above gross cash flows have been reduced by £446m (2019: £474m) for leases where Barclays is highly expected to exercise an early termination option. However, there is no significant impact where Barclays is expected to exercise an extension option.
Extension and termination options reasonably certain to be exercised	£ 446	474
Information about sale and leaseback transactions	The Group currently does not have any significant sale and lease back transactions. The Group does not have any restrictions or covenants imposed by the lessor on its property leases which restrict its businesses.
As a Lessor
Information about nature of lessor's leasing activities	As a Lessor Finance lease receivables are included within loans and advances at amortised cost. The Group specialises in the provision of leasing and other asset finance facilities across a broad range of asset types to business and individual customers.
Information about how lessor manages risk associated with rights it retains in underlying assets	Finance lease receivables are included within loans and advances at amortised cost. The Group specialises in the provision of leasing and other asset finance facilities across a broad range of asset types to business and individual customers.
Disclosure of maturity analysis of finance lease payments receivable [line items]
Finance lease receivables	£ 1,245	3,497
ECL
Disclosure of maturity analysis of finance lease payments receivable [line items]
Finance lease receivables	£ 29	£ 55

Goodwill and intangible asset_2

Goodwill and intangible assets - Annual rates in calculating amortisation (Narrative) (Details)	12 Months Ended
	Dec. 31, 2020
Software [member] | Min [member] | Internally generated [member]
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]
Amortisation period	12 months
Software [member] | Min [member] | Other [member]
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]
Amortisation period	12 months
Software [member] | Max [member] | Internally generated [member]
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]
Amortisation period	6 years
Software [member] | Max [member] | Other [member]
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]
Amortisation period	6 years
Certain core banking platforms | Min [member] | Internally generated [member]
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]
Amortisation period	10 years
Certain core banking platforms | Max [member] | Internally generated [member]
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]
Amortisation period	15 years
Customer lists [member] | Min [member]
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]
Amortisation period	12 months
Customer lists [member] | Max [member]
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]
Amortisation period	25 years
Licences and other [member] | Min [member]
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]
Amortisation period	12 months
Licences and other [member] | Max [member]
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]
Amortisation period	25 years

Goodwill and intangible asset_3

Goodwill and intangible assets - Goodwill and Intangible assets (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]
Intangible assets and goodwill	£ 8,119
Intangible assets and goodwill	7,948	£ 8,119
Cost [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]
Intangible assets and goodwill	13,862	13,180
Additions and disposals	762	814
Exchange and other movements	(113)	(132)
Intangible assets and goodwill	14,511	13,862
Cost [member] | Internally generated [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]
Intangible assets and goodwill		5,835
Additions and disposals	646	857
Exchange and other movements	(42)	(49)
Intangible assets and goodwill	7,247
Accumulated depreciation, amortisation and impairment [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]
Intangible assets and goodwill	(5,743)	(5,207)
Disposals	147	253
Amortisation charge	(898)	(854)
Impairment charge	(153)	(19)
Exchange and other movements	84	84
Intangible assets and goodwill	(6,563)	(5,743)
Goodwill [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]
Intangible assets and goodwill	3,899
Intangible assets and goodwill	3,891	3,899
Goodwill [member] | Cost [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]
Intangible assets and goodwill	4,760	4,768
Additions and disposals	(37)	0
Exchange and other movements	(7)	(8)
Intangible assets and goodwill	4,716	4,760
Goodwill [member] | Accumulated depreciation, amortisation and impairment [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]
Intangible assets and goodwill	(861)	(861)
Disposals	37	0
Amortisation charge	0	0
Impairment charge	0	0
Exchange and other movements	(1)	0
Intangible assets and goodwill	(825)	(861)
Software [member] | Internally generated [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]
Intangible assets and goodwill	3,654
Impairment charge	(153)
Intangible assets and goodwill	3,468	3,654
Software [member] | Other [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]
Intangible assets and goodwill	226
Intangible assets and goodwill	311	226
Software [member] | Cost [member] | Internally generated [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]
Intangible assets and goodwill	6,643	5,835
Additions and disposals	646	857
Exchange and other movements	(42)	(49)
Intangible assets and goodwill	7,247	6,643
Software [member] | Cost [member] | Other [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]
Intangible assets and goodwill	505	389
Additions and disposals	131	120
Exchange and other movements	3	(4)
Intangible assets and goodwill	639	505
Software [member] | Accumulated depreciation, amortisation and impairment [member] | Internally generated [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]
Intangible assets and goodwill	(2,989)	(2,362)
Disposals	97	67
Amortisation charge	(771)	(716)
Impairment charge	(147)	(17)
Exchange and other movements	31	39
Intangible assets and goodwill	(3,779)	(2,989)
Software [member] | Accumulated depreciation, amortisation and impairment [member] | Other [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]
Intangible assets and goodwill	(279)	(254)
Disposals	10	25
Amortisation charge	(51)	(52)
Impairment charge	(6)	(2)
Exchange and other movements	(2)	4
Intangible assets and goodwill	(328)	(279)
Customer lists [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]
Intangible assets and goodwill	215
Intangible assets and goodwill	167	215
Customer lists [member] | Cost [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]
Intangible assets and goodwill	1,465	1,630
Additions and disposals	0	(124)
Exchange and other movements	(46)	(41)
Intangible assets and goodwill	1,419	1,465
Customer lists [member] | Accumulated depreciation, amortisation and impairment [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]
Intangible assets and goodwill	(1,250)	(1,359)
Disposals	0	124
Amortisation charge	(43)	(49)
Impairment charge	0	0
Exchange and other movements	41	34
Intangible assets and goodwill	(1,252)	(1,250)
Licences and other [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]
Intangible assets and goodwill	125
Intangible assets and goodwill	111	125
Licences and other [member] | Cost [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]
Intangible assets and goodwill	489	558
Additions and disposals	22	(39)
Exchange and other movements	(21)	(30)
Intangible assets and goodwill	490	489
Licences and other [member] | Accumulated depreciation, amortisation and impairment [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]
Intangible assets and goodwill	(364)	(371)
Disposals	3	37
Amortisation charge	(33)	(37)
Impairment charge	0	0
Exchange and other movements	15	7
Intangible assets and goodwill	£ (379)	£ (364)

Goodwill and intangible asset_4

Goodwill and intangible assets - Goodwill allocated to business operations according to business segments (Details) - GBP (£) £ in Millions	Dec. 31, 2020	Dec. 31, 2019
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]
Goodwill	£ 3,891	£ 3,899
Intangibles	4,057	4,220
Carrying value	7,948	8,119
Head Office [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]
Goodwill	42	44
Intangibles	4	14
Carrying value	46	58
Barclays UK [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]
Goodwill	3,381
Intangibles	1,597
Carrying value	10,981
Barclays UK [member] | Operating segments [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]
Goodwill	3,560	3,526
Intangibles	1,618	1,520
Carrying value	5,178	5,046
Barclays International [member] | Operating segments [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]
Goodwill	289	329
Intangibles	2,435	2,686
Carrying value	£ 2,724	£ 3,015

Goodwill and intangible asset_5

Goodwill and intangible assets - Critical accounting estimates and judgements (Narrative) (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Determining the carrying value of CGUs
Information whether recoverable amount of asset is fair value less costs of disposal or value in use	The review of goodwill for impairment involves calculating a value in use (VIU) valuation which is compared to the carrying value of a CGU associated with the goodwill to determine whether any impairment has occurred.
Description of basis on which unit's recoverable amount has been determined	Key judgements include determining the carrying value of the CGU, the cash flows and discount rates used in the calculation.
Explanation of goodwill not allocated to cash-generating unit	The Education, Social Housing and Local Authority (ESHLA) portfolio has been excluded from the Business Banking CGU cash flows. This is a legacy loan portfolio which was previously within the Non-Core bank and was not part of the business to which the goodwill relates. As such, the cash flows relating to this portfolio have been excluded from the Business Banking VIU calculation.
Explanation of period over which management has projected cash flows		5-year
Yield used to discount cash flows that do not vary based on returns on underlying items	0.15%
Outcome of goodwill and intangibles review and Other intangible assets
Goodwill	£ 3,891	£ 3,899
Internally generated [member] | Software [member]
Outcome of goodwill and intangibles review and Other intangible assets
Intangibles impairment	£ 153
Cashflows
Determining the carrying value of CGUs
Description of management's approach to determining values assigned to key assumptions	The cash flow forecasts used by management involve judgement and are based upon a view of the future prospects of the business and market conditions at the point in time the assessment is prepared. The estimation of pre-tax cash flows is sensitive to the periods for which detailed forecasts are available and to assumptions regarding long-term sustainable cash flows.
Description of key assumptions on which management has based cash flow projections	The 5-year cash flows used in the calculation are based on the formally agreed medium term plans approved by the Board. These are prepared using macroeconomic assumptions which management consider reasonable and supportable, and reflect business agreed initiatives for the forecast period. The macroeconomic assumptions underpinning the medium term plan were determined in August 2020 and management has considered whether there are subsequent significant changes in those assumptions which would adversely impact the results of the impairment review.
Sensitivity of key judgements
Description of key assumptions on which management has based determination of fair value less costs of disposal	Cash flows: The medium term plans used to determine the cash flows used in the VIU calculation rely on macroeconomic forecasts, including interest rates, GDP and unemployment, and forecast levels of market and client activity. Interest rate assumptions impact planned cash flows from both customer income and structural hedge contributions and therefore cash flow expectations are highly sensitive to movements in the yield curve. The cash flows also contain assumptions with regards to the prudential and financial conduct regulatory environment which may be subject to change. Given the current level of economic uncertainty, a 10% reduction in cash flows has been provided to show the sensitivity of the outcome to a change in these key assumptions.
Discount rate
Determining the carrying value of CGUs
Description of management's approach to determining values assigned to key assumptions	The discount rates applied to the future cash flows also involve judgement as they can have a significant impact on the valuation. The discount rates used are compared to market participants to ensure that they are appropriate and based on an estimated cost of equity for each CGU.
Sensitivity of key judgements
Description of key assumptions on which management has based determination of fair value less costs of disposal	Discount rate: The discount rate should reflect the market risk free rate adjusted for the inherent risks of the business it is applied to. Management have identified discount rates for comparable businesses and consider these to be a reasonable estimate of a suitable market rate for the profile of the business unit being tested. The risk that these discount rates may not be appropriate is quantified below and show the impact of a 100 bps change in the discount rate.
Terminal growth rate
Determining the carrying value of CGUs
Description of management's approach to determining values assigned to key assumptions	The choice of a terminal growth rate used to determine the present value of the future cash flows of the CGUs is also a judgement that can impact the outcome of the assessment. The terminal growth rate and discount rates used may vary due to external market rates and economic conditions that are beyond management’s control.
Sensitivity of key judgements
Description of key assumptions on which management has based determination of fair value less costs of disposal	Terminal growth rate: The terminal growth rate is used to estimate the cash flows into perpetuity based on the expected longevity of the CGU’s businesses. The terminal growth rate is sensitive to uncertainties in the macroeconomic environment. The risk that using inflation data may not be appropriate for its determination is quantified below and shows the impact of 100 bps change in the terminal value.
Min [member]
Determining the carrying value of CGUs
Discount rate	12.00%	11.00%
Terminal growth rate	1.50%	2.00%
Max [member]
Determining the carrying value of CGUs
Discount rate	16.30%	13.30%
Barclays UK [member]
Outcome of goodwill and intangibles review and Other intangible assets
Goodwill	£ 3,381
Barclays UK [member] | Cashflows
Sensitivity of key judgements
Description of key assumptions on which management has based determination of fair value less costs of disposal	10% reduction in forecasted cash flows
Barclays UK [member] | Discount rate
Sensitivity of key judgements
Description of key assumptions on which management has based determination of fair value less costs of disposal	100 bps increase in the discount rate
Barclays UK [member] | Terminal growth rate
Sensitivity of key judgements
Description of key assumptions on which management has based determination of fair value less costs of disposal	100 bps decrease in terminal growth rate
Personal Banking | Barclays UK [member]
Determining the carrying value of CGUs
Discount rate	13.51%
Terminal growth rate	2.00%
Outcome of goodwill and intangibles review and Other intangible assets
Goodwill	£ 2,752	£ 2,718
Woolwich | Barclays UK [member]
Outcome of goodwill and intangibles review and Other intangible assets
Goodwill	£ 2,501	2,501
Business Banking | Barclays UK [member]
Determining the carrying value of CGUs
Discount rate	13.81%
Terminal growth rate	2.00%
Outcome of goodwill and intangibles review and Other intangible assets
Goodwill	£ 629	£ 629

Goodwill and intangible asset_6

Goodwill and intangible assets - The outcome the impairment review for Personal Banking and Business Banking (Details) - GBP (£) £ in Millions	Dec. 31, 2020	Dec. 31, 2019
Outcome of goodwill and intangibles review and Other intangible assets
Goodwill	£ 3,891	£ 3,899
Intangibles	4,057	4,220
Carrying value	7,948	8,119
Barclays UK [member]
Outcome of goodwill and intangibles review and Other intangible assets
Tangible equity	6,003
Goodwill	3,381
Intangibles	1,597
Carrying value	10,981
Value in use	11,844
Value in use exceeding carrying value	863	4,551
Personal Banking | Barclays UK [member]
Outcome of goodwill and intangibles review and Other intangible assets
Tangible equity	4,650
Goodwill	2,752	2,718
Intangibles	1,407
Carrying value	8,809
Value in use	8,932
Value in use exceeding carrying value	123	2,570
Business Banking | Barclays UK [member]
Outcome of goodwill and intangibles review and Other intangible assets
Tangible equity	1,353
Goodwill	629	629
Intangibles	190
Carrying value	2,172
Value in use	2,912
Value in use exceeding carrying value	£ 740	£ 1,981

Goodwill and intangible asset_7

Goodwill and intangible assets - The sensitivity of the value in use to key judgements in the calculations (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of information for cash-generating units [line items]
Carrying value	£ 7,948	£ 8,119
Discount rate
Sensitivity of key judgements
Description of key assumptions on which management has based determination of fair value less costs of disposal	Discount rate: The discount rate should reflect the market risk free rate adjusted for the inherent risks of the business it is applied to. Management have identified discount rates for comparable businesses and consider these to be a reasonable estimate of a suitable market rate for the profile of the business unit being tested. The risk that these discount rates may not be appropriate is quantified below and show the impact of a 100 bps change in the discount rate.
Terminal growth rate
Sensitivity of key judgements
Description of key assumptions on which management has based determination of fair value less costs of disposal	Terminal growth rate: The terminal growth rate is used to estimate the cash flows into perpetuity based on the expected longevity of the CGU’s businesses. The terminal growth rate is sensitive to uncertainties in the macroeconomic environment. The risk that using inflation data may not be appropriate for its determination is quantified below and shows the impact of 100 bps change in the terminal value.
Cashflows
Sensitivity of key judgements
Description of key assumptions on which management has based determination of fair value less costs of disposal	Cash flows: The medium term plans used to determine the cash flows used in the VIU calculation rely on macroeconomic forecasts, including interest rates, GDP and unemployment, and forecast levels of market and client activity. Interest rate assumptions impact planned cash flows from both customer income and structural hedge contributions and therefore cash flow expectations are highly sensitive to movements in the yield curve. The cash flows also contain assumptions with regards to the prudential and financial conduct regulatory environment which may be subject to change. Given the current level of economic uncertainty, a 10% reduction in cash flows has been provided to show the sensitivity of the outcome to a change in these key assumptions.
Barclays UK [member]
Disclosure of information for cash-generating units [line items]
Carrying value	£ 10,981
Value in use	11,844
Value in use exceeding carrying value	£ 863	4,551
Barclays UK [member] | Discount rate
Sensitivity of key judgements
Description of key assumptions on which management has based determination of fair value less costs of disposal	100 bps increase in the discount rate
Barclays UK [member] | Terminal growth rate
Sensitivity of key judgements
Description of key assumptions on which management has based determination of fair value less costs of disposal	100 bps decrease in terminal growth rate
Barclays UK [member] | Cashflows
Sensitivity of key judgements
Description of key assumptions on which management has based determination of fair value less costs of disposal	10% reduction in forecasted cash flows
Personal Banking | Barclays UK [member]
Disclosure of information for cash-generating units [line items]
Carrying value	£ 8,809
Value in use	8,932
Value in use exceeding carrying value	£ 123	2,570
Discount rate	13.51%
Terminal growth rate	2.00%
Personal Banking | Barclays UK [member] | Discount rate
Disclosure of information for cash-generating units [line items]
Value in use exceeding carrying value	£ (893)
Change required to reduce headroom to zero	0.001
Personal Banking | Barclays UK [member] | Terminal growth rate
Disclosure of information for cash-generating units [line items]
Value in use exceeding carrying value	£ (623)
Change required to reduce headroom to zero	(0.002)
Personal Banking | Barclays UK [member] | Cashflows
Disclosure of information for cash-generating units [line items]
Value in use exceeding carrying value	£ (972)
Change required to reduce headroom to zero	(0.013)
Business Banking | Barclays UK [member]
Disclosure of information for cash-generating units [line items]
Carrying value	£ 2,172
Value in use	2,912
Value in use exceeding carrying value	£ 740	£ 1,981
Discount rate	13.81%
Terminal growth rate	2.00%
Business Banking | Barclays UK [member] | Discount rate
Disclosure of information for cash-generating units [line items]
Value in use exceeding carrying value	£ (205)
Change required to reduce headroom to zero	0.046
Business Banking | Barclays UK [member] | Terminal growth rate
Disclosure of information for cash-generating units [line items]
Value in use exceeding carrying value	£ (128)
Change required to reduce headroom to zero	(0.097)
Business Banking | Barclays UK [member] | Cashflows
Disclosure of information for cash-generating units [line items]
Value in use exceeding carrying value	£ (206)
Change required to reduce headroom to zero	(0.359)

Other liabilities (Details)

Other liabilities (Details) - GBP (£) £ in Millions	Dec. 31, 2020	Dec. 31, 2019
23. Other liabilities
Accruals and deferred income	£ 3,683	£ 3,472
Other ceditors	3,447	3,257
Items in the course of collection due to other banks	88	213
Lease liabilities	1,444	1,563
Other liabilities	£ 8,662	£ 8,505

Provisions (Details)

Provisions (Details) £ in Millions	12 Months Ended
	Dec. 31, 2020GBP (£)
Disclosure of other provisions [line items]
Provisions, Beginning balance	£ 2,764
Additions	1,508
Amounts utilised	(1,585)
Unused amounts reversed	(343)
Exchange and other movements	(40)
Provisions, Ending balance	2,304
Onerous contracts [member]
Disclosure of other provisions [line items]
Provisions, Beginning balance	42
Additions	24
Amounts utilised	(13)
Unused amounts reversed	(25)
Exchange and other movements	0
Provisions, Ending balance	28
Redundancy and restructuring [member]
Disclosure of other provisions [line items]
Provisions, Beginning balance	143
Additions	194
Amounts utilised	(109)
Unused amounts reversed	(60)
Exchange and other movements	(10)
Provisions, Ending balance	158
Undrawn contractually committed facilities and guarantees [member] | IFRSs 9 [member]
Disclosure of other provisions [line items]
Provisions, Beginning balance	322
Additions	806
Amounts utilised	0
Unused amounts reversed	(30)
Exchange and other movements	(34)
Provisions, Ending balance	1,064
Payment protection insurance redress [member]
Disclosure of other provisions [line items]
Provisions, Beginning balance	1,155
Additions	0
Amounts utilised	(979)
Unused amounts reversed	(47)
Exchange and other movements	0
Provisions, Ending balance	129
Other customer redress [Member]
Disclosure of other provisions [line items]
Provisions, Beginning balance	420
Additions	186
Amounts utilised	(195)
Unused amounts reversed	(44)
Exchange and other movements	1
Provisions, Ending balance	368
Legal, competition and regulatory matters [member]
Disclosure of other provisions [line items]
Provisions, Beginning balance	376
Additions	106
Amounts utilised	(171)
Unused amounts reversed	(45)
Exchange and other movements	2
Provisions, Ending balance	268
Sundry provisions [member]
Disclosure of other provisions [line items]
Provisions, Beginning balance	306
Additions	192
Amounts utilised	(118)
Unused amounts reversed	(92)
Exchange and other movements	1
Provisions, Ending balance	£ 289

Provisions (Narrative) (Details

Provisions (Narrative) (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of other provisions [line items]
Provisions released	£ 343
Provisions	2,304	£ 2,764
Additions	1,508
Amounts utilised	1,585
Payment protection insurance redress [member]
Disclosure of other provisions [line items]
Provisions released	47
Provisions	129	1,155
Additions	0
Amounts utilised	979
Payment protection insurance redress [member] | Cumulative provisions [member]
Disclosure of other provisions [line items]
Provisions released	55
Provisions recognised	10,900	11,000
Amounts utilised	10,800	9,800
Not later than one year [member]
Disclosure of other provisions [line items]
Expected reimbursement, other provisions	£ 1,751	£ 2,457

Contingent liabilities and co_3

Contingent liabilities and commitments (Details) - GBP (£) £ in Millions	Dec. 31, 2020	Dec. 31, 2019
Financial guarantee contracts [member]
Disclosure of contingent liabilities [line items]
Notional amount	£ 21,609	£ 24,527
Loan commitments [member]
Disclosure of contingent liabilities [line items]
Notional amount	333,049	334,455
of which: Carried at fair value [member] | Financial guarantee contracts [member]
Disclosure of contingent liabilities [line items]
Notional amount	229	43
of which: Carried at fair value [member] | Loan commitments [member]
Disclosure of contingent liabilities [line items]
Notional amount	9,269	17,679
Guarantees and letters of credit pledged as collateral security [member] | Financial guarantee contracts [member]
Disclosure of contingent liabilities [line items]
Notional amount	15,665	17,606
Performance guarantees, acceptances and endorsements [member] | Financial guarantee contracts [member]
Disclosure of contingent liabilities [line items]
Notional amount	5,944	6,921
Documentary credits and other short-term trade related transactions [Member] | Loan commitments [member]
Disclosure of contingent liabilities [line items]
Notional amount	1,086	1,291
Standby facilities, credit lines and other commitments [member] | Loan commitments [member]
Disclosure of contingent liabilities [line items]
Notional amount	£ 331,963	£ 333,164

Contingent liabilities and co_4

Contingent liabilities and commitments (Narrative) (Details) - GBP (£) £ in Millions	Dec. 31, 2020	Dec. 31, 2019
Disclosure of contingent liabilities [line items]
Provisions	£ 2,304	£ 2,764
Expected credit losses held against contingent liabilities and commitments [member]
Disclosure of contingent liabilities [line items]
Provisions	£ 1,064	£ 322

Legal, competition and regula_2

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

1 Months Ended

12 Months Ended

Jun. 30, 2019CHF (SFr)

May 31, 2019EUR (€)

Jan. 31, 2017

Sep. 30, 2013GBP (£)

Dec. 31, 2020GBP (£)

Dec. 31, 2020USD ($)

Dec. 31, 2019GBP (£)

Dec. 31, 2018GBP (£)

Dec. 31, 2018USD ($)

Dec. 31, 2016USD ($)

Dec. 31, 2012USD ($)

Dec. 31, 2008USD ($)

Disclosure of contingent liabilities [line items]

Losses on litigation settlements | £

£ 153

£ 1,849

£ 2,207

Provisions recognised | £

1,585

Civil penalty [Member]

Disclosure of contingent liabilities [line items]

Loss Contingency, Damages Sought, claimed amounts, Value

$ 5.7

FCA Proceedings and other investigations [Member] | Barclays Bank PLC [member]

Disclosure of contingent liabilities [line items]

Loss contingency, Financial penalty warning | £

£ 50

Civil action [Member] | Barclays Bank PLC [member]

Disclosure of contingent liabilities [line items]

Loss Contingency, Damages Sought, claimed amounts, Value | £

£ 819

Investigations into LIBOR and other benchmarks [Member] | Barclays Bank PLC [member]

Disclosure of contingent liabilities [line items]

Explanation of general nature of dispute and of reason for non-disclosure of information regarding contingent liability

Regulators and law enforcement agencies, including certain competition authorities, from a number of governments have conducted investigations relating to Barclays Bank PLC’s involvement in allegedly manipulating certain financial benchmarks, such as LIBOR. The SFO closed its investigation with no action to be taken against the Group. 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.

Regulators and law enforcement agencies, including certain competition authorities, from a number of governments have conducted investigations relating to Barclays Bank PLC’s involvement in allegedly manipulating certain financial benchmarks, such as LIBOR. The SFO closed its investigation with no action to be taken against the Group. 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 Cases in MDL Court [Member] | Barclays Bank PLC [member]

Disclosure of contingent liabilities [line items]

Explanation of general nature of dispute and of reason for non-disclosure of information regarding contingent liability

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 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).

USD LIBOR Cases in MDL Court [Member] | Lawsuits with specified damages sought [Member] | Barclays Bank PLC [member]

Disclosure of contingent liabilities [line items]

Loss Contingency, Damages Sought, claimed amounts, Value

$ 900

USD LIBOR Cases in MDL Court [Member] | Exchange-Based Class claims [Member] | Barclays Bank PLC [member]

Disclosure of contingent liabilities [line items]

Losses on litigation settlements

$ 20

USD LIBOR Cases in MDL Court [Member] | Debt Securities Class claims [Member] | Barclays Bank PLC [member]

Disclosure of contingent liabilities [line items]

Losses on litigation settlements

$ 7.1

Foreign Exchange investigations [Member] | Securities and Exchange Commission [Member]

Disclosure of contingent liabilities [line items]

Losses on litigation settlements

SFr 27

€ 210

Foreign Exchange investigations [Member] | Barclays Bank PLC [member]

Disclosure of contingent liabilities [line items]

Explanation of general nature of dispute and of reason for non-disclosure of information regarding contingent liability

In 2015, the Group reached settlements totalling approximately $2.38bn with various US federal and state authorities and the FCA in relation to investigations into certain sales and trading practices in the Foreign Exchange market. Under the related plea agreement with the US Department of Justice (DoJ), which received final court approval in January 2017, the Group agreed to a term of probation of three years, which expired in January 2020. The Group also continues to provide relevant information to certain authorities.

In 2015, the Group reached settlements totalling approximately $2.38bn with various US federal and state authorities and the FCA in relation to investigations into certain sales and trading practices in the Foreign Exchange market. Under the related plea agreement with the US Department of Justice (DoJ), which received final court approval in January 2017, the Group agreed to a term of probation of three years, which expired in January 2020. The Group also continues to provide relevant information to certain authorities.

Losses on litigation settlements

$ 2,380

Number of years probation

3 years

Foreign Exchange investigations [Member] | Fines settlement [Member] | Barclays Bank PLC [member]

Disclosure of contingent liabilities [line items]

Losses on litigation settlements

$ 384

US residential and commercial mortgage-related activity and litigation [Member] | RMBS Repurchase Requests [Member] | Originated and sold to third parties by Acquired Subsidiary [Member] | Barclays Bank PLC [member]

Disclosure of contingent liabilities [line items]

Original unpaid principal balance at time of sale

$ 2,100

US residential and commercial mortgage-related activity and litigation [Member] | Civil penalty [Member]

Disclosure of contingent liabilities [line items]

Loss Contingency, Damages Sought, claimed amounts, Value

$ 22

Civil actions in respect of the US Anti-Terrorism Act [Member] | Barclays Bank PLC [member]

Disclosure of contingent liabilities [line items]

Explanation of general nature of dispute and of reason for non-disclosure of information regarding contingent liability

There are a number of civil actions, on behalf of more than 4,000 plaintiffs, 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 Government of Iran and various Iranian banks, which in turn funded acts of terrorism that injured or killed plaintiffs or 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.

There are a number of civil actions, on behalf of more than 4,000 plaintiffs, 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 Government of Iran and various Iranian banks, which in turn funded acts of terrorism that injured or killed plaintiffs or 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.

BDC Finance LLC [Member] | Barclays Bank PLC [member]

Disclosure of contingent liabilities [line items]

Explanation of general nature of dispute and of reason for non-disclosure of information regarding contingent liability

In 2008, BDC Finance L.L.C. (BDC) filed a complaint in the 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 (collectively, the Agreement).

In 2008, BDC Finance L.L.C. (BDC) filed a complaint in the 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 (collectively, the Agreement).

Litigation settlements approved, value

$ 298

HM Revenue and Customs (HMRC) assessments concerning UK Value Added Tax [member]

Disclosure of contingent liabilities [line items]

Explanation of general nature of dispute and of reason for non-disclosure of information regarding contingent liability

In 2018, HMRC issued notices that have the effect of removing certain overseas subsidiaries that have operations in the UK from Barclays’ UK VAT group, in which group supplies between members are generally free from VAT. The notices have retrospective effect and correspond to assessments of £181m (inclusive of interest), of which Barclays would expect to attribute an amount of approximately £128m to Barclays Bank UK PLC and £53m to Barclays Bank PLC. Barclays has appealed HMRC’s decision to the First Tier Tribunal (Tax Chamber).

In 2018, HMRC issued notices that have the effect of removing certain overseas subsidiaries that have operations in the UK from Barclays’ UK VAT group, in which group supplies between members are generally free from VAT. The notices have retrospective effect and correspond to assessments of £181m (inclusive of interest), of which Barclays would expect to attribute an amount of approximately £128m to Barclays Bank UK PLC and £53m to Barclays Bank PLC. Barclays has appealed HMRC’s decision to the First Tier Tribunal (Tax Chamber).

Loss Contingency, Damages Sought, claimed amounts, Value | £

181

HM Revenue and Customs (HMRC) assessments concerning UK Value Added Tax [member] | Barclays Bank UK PLC [member]

Disclosure of contingent liabilities [line items]

Loss Contingency, Damages Sought, claimed amounts, Value | £

128

HM Revenue and Customs (HMRC) assessments concerning UK Value Added Tax [member] | Barclays Bank PLC [member]

Disclosure of contingent liabilities [line items]

Loss Contingency, Damages Sought, claimed amounts, Value | £

£ 53

Subordinated Liabilities - Unda

Subordinated Liabilities - Undated and dated loan capital (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019		Dec. 31, 2018		Dec. 31, 2020	Dec. 31, 2019
27. Subordinated liabilities
Opening balance as at 1 January	£ 18,156	£ 20,559
Issuance of subordinated debt	1,438	1,352	[1]	£ 221	[1]
Redemptions	(3,464)	(3,248)
Other	211	(507)
Closing balance as at 31 December	16,341	18,156		20,559
Undated subordinated liabilities						£ 308	£ 303
Dated subordinated liabilities						16,033	17,853
Total subordinated liabilities	£ 18,156	£ 20,559		£ 20,559		£ 16,341	£ 18,156
[1]	2019 and 2018 comparative figures have been restated to make the cash flow statement more relevant following a review of the disclosure and the accounting policies applied. Amendments have been made to the classification of cash collateral reported within cash and cash equivalents and to the presentation of items within net cash flows from operating and investing activities. Footnotes b and c below quantify the impact of the changes to the respective cash flow categories in prior periods and provide further detail .

Subordinated Liabilities - Un_2

Subordinated Liabilities - Undated (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of detailed information about borrowings [line items]
Undated subordinated liabilities	£ 308	£ 303
Barclays Bank PLC [member]
Disclosure of detailed information about borrowings [line items]
Undated subordinated liabilities	308	303
6% Callable Perpetual Core Tier One Notes | Barclays Bank PLC [member]
Disclosure of detailed information about borrowings [line items]
Undated subordinated liabilities	£ 17	16
Initial call date	2032
6.86% Callable Perpetual Core Tier One Notes (USD 179m) | Barclays Bank PLC [member]
Disclosure of detailed information about borrowings [line items]
Undated subordinated liabilities	£ 205	203
Initial call date	2032
5.3304% Step-up Callable Perpetual Reserve Capital Instruments | Barclays Bank PLC [member]
Disclosure of detailed information about borrowings [line items]
Undated subordinated liabilities	£ 56	53
Initial call date	2036
Junior Undated Floating Rate Notes (USD 38m) | Floating interest rate [member] | Barclays Bank PLC [member]
Disclosure of detailed information about borrowings [line items]
Undated subordinated liabilities	£ 28	£ 29
Initial call date	Any interest payment date

Subordinated Liabilities - Un_3

Subordinated Liabilities - Undated (Parenthetical) (Details) - Barclays Bank PLC [member] $ in Millions	Dec. 31, 2020USD ($)
6% Callable Perpetual Core Tier One Notes
Disclosure of detailed information about borrowings [line items]
Borrowings, interest rate	6.00%
6.86% Callable Perpetual Core Tier One Notes (USD 179m)
Disclosure of detailed information about borrowings [line items]
Borrowings, interest rate	6.86%
Notional amount	$ 179
5.3304% Step-up Callable Perpetual Reserve Capital Instruments
Disclosure of detailed information about borrowings [line items]
Borrowings, interest rate	5.3304%
Junior Undated Floating Rate Notes (USD 38m) | Floating interest rate [member]
Disclosure of detailed information about borrowings [line items]
Notional amount	$ 38

Subordinated Liabilities - Date

Subordinated Liabilities - Dated (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of detailed information about borrowings [line items]
Dated subordinated liabilities	£ 16,033	£ 17,853
Other subsidiaries [member]
Disclosure of detailed information about borrowings [line items]
Dated subordinated liabilities	£ 146	358
Maturity Date	2025
2.625% Fixed Rate Subordinated Callable Notes (EUR 1,250m), Due 2025 | Fixed interest rate [member] | Barclays PLC [member]
Disclosure of detailed information about borrowings [line items]
Dated subordinated liabilities	£ 0	1,072
Initial call date	2020
Maturity Date	2025
2% Fixed Rate Subordinated Callable Notes (EUR 1,500m), Due 2028 | Fixed interest rate [member] | Barclays PLC [member]
Disclosure of detailed information about borrowings [line items]
Dated subordinated liabilities	£ 1,384	1,309
Initial call date	2023
Maturity Date	2028
4.375% Fixed Rate Subordinated Notes (USD 1,250m), Due 2024 | Fixed interest rate [member] | Barclays PLC [member]
Disclosure of detailed information about borrowings [line items]
Dated subordinated liabilities	£ 990	995
Maturity Date	2024
3.75% Resetting Subordinated Callable Note (SGD 200m), Due 2030 | Fixed interest rate [member] | Barclays PLC [member]
Disclosure of detailed information about borrowings [line items]
Dated subordinated liabilities	£ 119	116
Initial call date	2025
Maturity Date	2030
3.75% Resetting Subordinated Callable Notes (GBP 500m), Due 2030 | Fixed interest rate [member] | Barclays PLC [member]
Disclosure of detailed information about borrowings [line items]
Dated subordinated liabilities	£ 504
Initial call date	2025
Maturity Date	2030
5.20% Fixed Rate Subordinated Notes (USD 2,050m), Due 2026 | Fixed interest rate [member] | Barclays PLC [member]
Disclosure of detailed information about borrowings [line items]
Dated subordinated liabilities	£ 1,610	1,561
Maturity Date	2026
4.836% Fixed Rate Subordinated Callable Notes (USD 2,000m), Due 2028 | Fixed interest rate [member] | Barclays PLC [member]
Disclosure of detailed information about borrowings [line items]
Dated subordinated liabilities	£ 1,627	1,578
Initial call date	2027
Maturity Date	2028
5.088% Fixed to Floating Rate Subordinated Callable Notes (USD 1,500m) | Fixed-to-Floating Interest Rate [member] | Barclays PLC [member]
Disclosure of detailed information about borrowings [line items]
Dated subordinated liabilities	£ 1,213	1,152
Initial call date	2029
Maturity Date	2030
3.564% Fixed Rate Resetting Subordinated Callable Notes (USD 1,000m), Due 2035 | Fixed interest rate [member] | Barclays PLC [member]
Disclosure of detailed information about borrowings [line items]
Dated subordinated liabilities	£ 703
Initial call date	2030
Maturity Date	2035
5.14% Lower Tier 2 Notes (USD 1,094m), Due 2020 | Barclays Bank PLC [member]
Disclosure of detailed information about borrowings [line items]
Dated subordinated liabilities	£ 0	832
Maturity Date	2020
6% Fixed Rate Subordinated Notes (EUR 1,500m), Due 2021 | Fixed interest rate [member] | Barclays Bank PLC [member]
Disclosure of detailed information about borrowings [line items]
Dated subordinated liabilities	£ 1,427	1,375
Maturity Date	2021
9.5% Subordinated Bonds (ex-Woolwich Plc), Due 2021 | Barclays Bank PLC [member]
Disclosure of detailed information about borrowings [line items]
Dated subordinated liabilities	£ 221	239
Maturity Date	2021
Subordinated Floating Rate Notes (EUR 100m), Due 2021 | Floating interest rate [member] | Barclays Bank PLC [member]
Disclosure of detailed information about borrowings [line items]
Dated subordinated liabilities	£ 90	85
Maturity Date	2021
10% Fixed Rate Subordinated Notes, Due 2021 | Fixed interest rate [member] | Barclays Bank PLC [member]
Disclosure of detailed information about borrowings [line items]
Dated subordinated liabilities	£ 2,108	2,157
Maturity Date	2021
10.179% Fixed Rate Subordinated Notes (USD 1,521m), Due 2021 | Fixed interest rate [member] | Barclays Bank PLC [member]
Disclosure of detailed information about borrowings [line items]
Dated subordinated liabilities	£ 1,101	1,123
Maturity Date	2021
Subordinated Floating Rate Notes (EUR 50m), Due 2022 | Floating interest rate [member] | Barclays Bank PLC [member]
Disclosure of detailed information about borrowings [line items]
Dated subordinated liabilities	£ 45	43
Maturity Date	2022
6.625% Fixed Rate Subordinated Notes (EUR 1,000m), Due 2022 | Fixed interest rate [member] | Barclays Bank PLC [member]
Disclosure of detailed information about borrowings [line items]
Dated subordinated liabilities	£ 982	957
Maturity Date	2022
7.625% Contingent Capital Notes (USD 3,000m), Due 2022 | Barclays Bank PLC [member]
Disclosure of detailed information about borrowings [line items]
Dated subordinated liabilities	£ 1,132	2,284
Maturity Date	2022
Subordinated Floating Rate Notes (EUR 50m), Due 2023 | Floating interest rate [member] | Barclays Bank PLC [member]
Disclosure of detailed information about borrowings [line items]
Dated subordinated liabilities	£ 45	42
Maturity Date	2023
5.75% Fixed Rate Subordinated Notes, Due 2026 | Fixed interest rate [member] | Barclays Bank PLC [member]
Disclosure of detailed information about borrowings [line items]
Dated subordinated liabilities	£ 351	350
Maturity Date	2026
5.4% Reverse Dual Currency Subordinated Loan (JPY 15,000m), Due 2027 | Barclays Bank PLC [member]
Disclosure of detailed information about borrowings [line items]
Dated subordinated liabilities	£ 108	105
Maturity Date	2027
6.33% Subordinated Notes, Due 2032 | Barclays Bank PLC [member]
Disclosure of detailed information about borrowings [line items]
Dated subordinated liabilities	£ 64	62
Maturity Date	2032
Subordinated Floating Rate Notes (EUR 68m), Due 2040 | Floating interest rate [member] | Barclays Bank PLC [member]
Disclosure of detailed information about borrowings [line items]
Dated subordinated liabilities	£ 61	£ 58
Maturity Date	2040

Subordinated Liabilities - Da_2

Subordinated Liabilities - Dated (Parenthetical) (Details)	Dec. 31, 2020EUR (€)	Dec. 31, 2020GBP (£)	Dec. 31, 2020JPY (¥)	Dec. 31, 2020SGD ($)	Dec. 31, 2020USD ($)
2.625% Fixed Rate Subordinated Callable Notes (EUR 1,250m), Due 2025 | Fixed interest rate [member] | Barclays PLC [member]
Disclosure of detailed information about borrowings [line items]
Notional amount | €	€ 1,250,000,000
Interest rate	2.625%	2.625%	2.625%	2.625%	2.625%
2% Fixed Rate Subordinated Callable Notes (EUR 1,500m), Due 2028 | Fixed interest rate [member] | Barclays PLC [member]
Disclosure of detailed information about borrowings [line items]
Notional amount | €	€ 1,500,000,000
Interest rate	2.00%	2.00%	2.00%	2.00%	2.00%
4.375% Fixed Rate Subordinated Notes (USD 1,250m), Due 2024 | Fixed interest rate [member] | Barclays PLC [member]
Disclosure of detailed information about borrowings [line items]
Notional amount					$ 1,250,000,000
Interest rate	4.375%	4.375%	4.375%	4.375%	4.375%
3.75% Resetting Subordinated Callable Note (SGD 200m), Due 2030 | Fixed interest rate [member] | Barclays PLC [member]
Disclosure of detailed information about borrowings [line items]
Notional amount				$ 200,000,000
Interest rate	3.75%	3.75%	3.75%	3.75%	3.75%
3.75% Resetting Subordinated Callable Notes (GBP 500m), Due 2030 | Fixed interest rate [member] | Barclays PLC [member]
Disclosure of detailed information about borrowings [line items]
Notional amount | £		£ 500,000,000
Interest rate	3.75%	3.75%	3.75%	3.75%	3.75%
5.20% Fixed Rate Subordinated Notes (USD 2,050m), Due 2026 | Fixed interest rate [member] | Barclays PLC [member]
Disclosure of detailed information about borrowings [line items]
Notional amount					$ 2,050,000,000
Interest rate	5.20%	5.20%	5.20%	5.20%	5.20%
4.836% Fixed Rate Subordinated Callable Notes (USD 2,000m), Due 2028 | Fixed interest rate [member] | Barclays PLC [member]
Disclosure of detailed information about borrowings [line items]
Notional amount					$ 2,000,000,000
Interest rate	4.836%	4.836%	4.836%	4.836%	4.836%
5.088% Fixed to Floating Rate Subordinated Callable Notes (USD 1,500m) | Fixed-to-Floating Interest Rate [member] | Barclays PLC [member]
Disclosure of detailed information about borrowings [line items]
Notional amount					$ 1,500,000,000
Interest rate	5.088%	5.088%	5.088%	5.088%	5.088%
3.564% Fixed Rate Resetting Subordinated Callable Notes (USD 1,000m), Due 2035 | Fixed interest rate [member] | Barclays PLC [member]
Disclosure of detailed information about borrowings [line items]
Notional amount					$ 1,000,000,000
Interest rate	3.564%	3.564%	3.564%	3.564%	3.564%
5.14% Lower Tier 2 Notes (USD 1,094m), Due 2020 | Barclays Bank PLC [member]
Disclosure of detailed information about borrowings [line items]
Notional amount					$ 1,094,000,000
Interest rate	5.14%	5.14%	5.14%	5.14%	5.14%
6% Fixed Rate Subordinated Notes (EUR 1,500m), Due 2021 | Fixed interest rate [member] | Barclays Bank PLC [member]
Disclosure of detailed information about borrowings [line items]
Notional amount | €	€ 1,500,000,000
Interest rate	6.00%	6.00%	6.00%	6.00%	6.00%
9.5% Subordinated Bonds (ex-Woolwich Plc), Due 2021 | Barclays Bank PLC [member]
Disclosure of detailed information about borrowings [line items]
Interest rate	9.50%	9.50%	9.50%	9.50%	9.50%
Subordinated Floating Rate Notes (EUR 100m), Due 2021 | Floating interest rate [member] | Barclays Bank PLC [member]
Disclosure of detailed information about borrowings [line items]
Notional amount | €	€ 100,000,000
10% Fixed Rate Subordinated Notes, Due 2021 | Fixed interest rate [member] | Barclays Bank PLC [member]
Disclosure of detailed information about borrowings [line items]
Interest rate	10.00%	10.00%	10.00%	10.00%	10.00%
10.179% Fixed Rate Subordinated Notes (USD 1,521m), Due 2021 | Fixed interest rate [member] | Barclays Bank PLC [member]
Disclosure of detailed information about borrowings [line items]
Notional amount					$ 1,521,000,000
Interest rate	10.179%	10.179%	10.179%	10.179%	10.179%
Subordinated Floating Rate Notes (EUR 50m), Due 2022 | Floating interest rate [member] | Barclays Bank PLC [member]
Disclosure of detailed information about borrowings [line items]
Notional amount | €	€ 50,000,000
6.625% Fixed Rate Subordinated Notes (EUR 1,000m), Due 2022 | Fixed interest rate [member] | Barclays Bank PLC [member]
Disclosure of detailed information about borrowings [line items]
Notional amount | €	€ 1,000,000,000
Interest rate	6.625%	6.625%	6.625%	6.625%	6.625%
7.625% Contingent Capital Notes (USD 3,000m), Due 2022 | Barclays Bank PLC [member]
Disclosure of detailed information about borrowings [line items]
Notional amount					$ 3,000,000,000
Interest rate	7.625%	7.625%	7.625%	7.625%	7.625%
Subordinated Floating Rate Notes (EUR 50m), Due 2023 | Floating interest rate [member] | Barclays Bank PLC [member]
Disclosure of detailed information about borrowings [line items]
Notional amount | €	€ 50,000,000
5.75% Fixed Rate Subordinated Notes, Due 2026 | Fixed interest rate [member] | Barclays Bank PLC [member]
Disclosure of detailed information about borrowings [line items]
Interest rate	5.75%	5.75%	5.75%	5.75%	5.75%
5.4% Reverse Dual Currency Subordinated Loan (JPY 15,000m), Due 2027 | Barclays Bank PLC [member]
Disclosure of detailed information about borrowings [line items]
Notional amount | ¥			¥ 15,000,000,000
Interest rate	5.40%	5.40%	5.40%	5.40%	5.40%
6.33% Subordinated Notes, Due 2032 | Barclays Bank PLC [member]
Disclosure of detailed information about borrowings [line items]
Interest rate	6.33%	6.33%	6.33%	6.33%	6.33%
Subordinated Floating Rate Notes (EUR 68m), Due 2040 | Floating interest rate [member] | Barclays Bank PLC [member]
Disclosure of detailed information about borrowings [line items]
Notional amount | €	€ 68,000,000

Subordinated Liabilities (Narra

Subordinated Liabilities (Narrative) (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019		Dec. 31, 2018
Disclosure of detailed information about borrowings [line items]
Issuance of subordinated debt	£ 1,438	£ 1,352	[1]	£ 221	[1]
GBP [Abstract]
Redemption of subordinated debt	3,258	3,248	[1]	3,246	[1]
Barclays PLC [member]
Disclosure of detailed information about borrowings [line items]
Issuance of subordinated debt	£ 158	£ 1,194		£ 0
Management of internal investments, loans and advances	Barclays PLC retains the discretion to manage the nature of its internal investments in subsidiaries according to their regulatory and business needs. Barclays PLC may invest capital and funding into Barclays Bank PLC, Barclays Bank UK PLC and other Group subsidiaries such as Barclays Execution Services Limited and the US Intermediate Holding Company (IHC).
Undated subordinated liabilities [member]
Disclosure of detailed information about borrowings [line items]
Description of interest rate	The Junior Undated Notes are floating rate notes where rates are fixed periodically in advance based on the related market rate. The TONs and RCIs bear a fixed rate of interest until the initial call date. After the initial call date, in the event that they are not redeemed, the TONs and RCIs will bear interest at rates fixed periodically in advance based on market rates.
Description of interest payments	No payment of principal or any interest may be made in relation to the TONs and RCIs unless Barclays Bank PLC satisfies a specified solvency test. Barclays Bank PLC may elect to defer any payment of interest on the RCIs. Any such deferred payment of interest must be paid on the earlier of: (i) the date of redemption of the RCIs, and (ii) the coupon payment date falling on or nearest to the tenth anniversary of the date of deferral of such payment. Whilst such deferral is continuing, (i) neither Barclays Bank PLC nor Barclays PLC may declare or pay a dividend, subject to certain exceptions, on any of its ordinary shares or preference shares and (ii) certain restrictions on the redemption, purchase or reduction of their respective share capital and certain other securities also apply. Barclays Bank PLC may elect to defer any payment of interest on the TONs if it determines that it is, or such payment would result in it being, in non-compliance with capital adequacy requirements and policies of the PRA. Any such deferred payment of interest will only be payable on a redemption of the TONs. Until such time as Barclays Bank PLC next makes a payment of interest on the TONs, (i) neither Barclays Bank PLC nor Barclays PLC may declare or pay a dividend, subject to certain exceptions, on any of their respective ordinary shares or preference shares, or make payments of interest in respect of Barclays Bank PLC’s Reserve Capital Instruments and (ii) certain restrictions on the redemption, purchase or reduction of their respective share capital and certain other securities also apply.
Description of repayment period	All undated subordinated liabilities are repayable at the option of Barclays Bank PLC, generally in whole, at the initial call date and on any subsequent coupon or interest payment date. In addition, each issue of undated subordinated liabilities is repayable, at the option of Barclays Bank PLC in whole for certain tax reasons, either at any time, or on an interest payment date. There are no events of default except non-payment of principal or mandatory interest. Any repayments require the prior consent of the PRA.
Dated subordinated liabilities [member]
Disclosure of detailed information about borrowings [line items]
Description of interest rate	Interest on the Floating Rate Notes is fixed periodically in advance, based on the related market rates. Interest on Fixed Rate Notes is set by reference to market rates at the time of issuance and fixed until maturity. Interest on the 4.836% Fixed Rate Subordinated Callable Notes, 2% Fixed Rate Subordinated Callable Notes 3.75% SGD Fixed Rate Resetting Subordinated Callable Notes, 3.75% GBP Fixed Rate Resetting Subordinated Callable Notes and the 3.564% Fixed Rate Resetting Subordinated Callable Notes are fixed until the call date. After the respective call dates, in the event that they are not redeemed, the interest rates will be reset and fixed until maturity based on a market rate. Interest on the 5.088% Fixed-to-Floating Rate Subordinated Callable Notes are fixed until the call date. After the call date, in the event that they are not redeemed, the interest rate will reset periodically in advance based on market rates.
Description of repayment period	Those subordinated liabilities with a call date are repayable at the option of the issuer, on conditions governing the respective debt obligations, some in whole or in part, and some only in whole. The remaining dated subordinated liabilities outstanding at 31 December 2020 are redeemable only on maturity, subject in particular cases to provisions allowing an early redemption in the event of certain changes in tax law, or to certain changes in legislation or regulations. Any repayments prior to maturity require, in the case of Barclays PLC and Barclays Bank PLC, the prior consent of the PRA, or in the case of the overseas issues, the approval of the local regulator for that jurisdiction and of the PRA in certain circumstances. There are no committed facilities in existence at the balance sheet date which permit the refinancing of debt beyond the date of maturity.
USD Notes | Fixed interest rate [member]
GBP [Abstract]
Redemption of subordinated debt	£ 30
USD Notes | Floating interest rate [member]
Disclosure of detailed information about borrowings [line items]
Issuance of subordinated debt	156
GBP [Abstract]
Redemption of subordinated debt	£ 342
7.625% Contingent Capital Notes (USD 3,000m), Due 2022
Disclosure of detailed information about borrowings [line items]
Management of internal investments, loans and advances	The 7.625% Contingent Capital Notes will be automatically transferred from investors to Barclays PLC (or another entity within the Group) for nil consideration in the event the Barclays PLC transitional CET1 ratio falls below 7%.
GBP [Abstract]
Redemption of subordinated debt	£ 1,126
7.625% Contingent Capital Notes (USD 3,000m), Due 2022 | Barclays Bank PLC [member]
Percentages [Abstract]
Interest rate	7.625%
5.14% Lower Tier 2 Notes (USD 1,094m), Due 2020
GBP [Abstract]
Redemption of subordinated debt	£ 842
5.14% Lower Tier 2 Notes (USD 1,094m), Due 2020 | Barclays Bank PLC [member]
Percentages [Abstract]
Interest rate	5.14%
3.564% Fixed Rate Resetting Subordinated Callable Notes (USD 1,000m), Due 2035 | Fixed interest rate [member]
Disclosure of detailed information about borrowings [line items]
Issuance of subordinated debt	£ 782
3.564% Fixed Rate Resetting Subordinated Callable Notes (USD 1,000m), Due 2035 | Fixed interest rate [member] | Barclays PLC [member]
Percentages [Abstract]
Interest rate	3.564%
3.75% Resetting Subordinated Callable Notes (GBP 500m), Due 2030 | Fixed interest rate [member]
Disclosure of detailed information about borrowings [line items]
Issuance of subordinated debt	£ 500
3.75% Resetting Subordinated Callable Notes (GBP 500m), Due 2030 | Fixed interest rate [member] | Barclays PLC [member]
Percentages [Abstract]
Interest rate	3.75%
2.625% Fixed Rate Subordinated Callable Notes (EUR 1,250m), Due 2025 | Fixed interest rate [member]
GBP [Abstract]
Redemption of subordinated debt	£ 1,124
2.625% Fixed Rate Subordinated Callable Notes (EUR 1,250m), Due 2025 | Fixed interest rate [member] | Barclays PLC [member]
Percentages [Abstract]
Interest rate	2.625%
3.75% Resetting Subordinated Callable Notes (SGD 200m), Due 2030 | Fixed interest rate [member] | Barclays PLC [member]
Percentages [Abstract]
Interest rate	3.75%
5.088% Fixed to Floating Rate Subordinated Callable Notes (USD 1,500m) | Fixed-to-Floating Interest Rate [member] | Barclays PLC [member]
Percentages [Abstract]
Interest rate	5.088%
4.836% Fixed Rate Subordinated Callable Notes (USD 2,000m), Due 2028 | Fixed interest rate [member] | Barclays PLC [member]
Percentages [Abstract]
Interest rate	4.836%
[1]	2019 and 2018 comparative figures have been restated to make the cash flow statement more relevant following a review of the disclosure and the accounting policies applied. Amendments have been made to the classification of cash collateral reported within cash and cash equivalents and to the presentation of items within net cash flows from operating and investing activities. Footnotes b and c below quantify the impact of the changes to the respective cash flow categories in prior periods and provide further detail .

Ordinary shares, share premiu_3

Ordinary shares, share premium, and other equity - Called up share capital, allotted and fully paid (Details) - GBP (£) £ in Millions, shares in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Reconciliation of number of shares outstanding [abstract]
Beginning Balance, equity	£ 65,660	£ 63,779	£ 63,866
Issued to staff under share incentive plans, equity	346	579	500
Issuances relating to Scrip Dividend Programme, equity		182	88
Other movements	5	3	(16)
Ending Balance, equity	66,882	65,660	63,779
Total share capital and share premium [member]
Reconciliation of number of shares outstanding [abstract]
Beginning Balance, equity	4,594	4,311	22,045
Issued to staff under share incentive plans, equity	43	101	51
Issuances relating to Scrip Dividend Programme, equity		182	88
At1 securities issuance	0	0
At1 securities redemption	0	0
Other movements	0	0	0
Ending Balance, equity	4,637	4,594	4,311
Other equity instruments [member]
Reconciliation of number of shares outstanding [abstract]
Beginning Balance, equity	10,871	9,632	8,941
Issued to staff under share incentive plans, equity	0	0	0
Issuances relating to Scrip Dividend Programme, equity		0	0
At1 securities issuance	1,142	3,500
At1 securities redemption	(831)	(2,262)
Other movements	(10)	1	(1)
Ending Balance, equity	£ 11,172	£ 10,871	£ 9,632
Ordinary shares
Reconciliation of number of shares outstanding [abstract]
Begining balance, shares	17,322	17,133
Issued to staff under share incentive plans, shares	37	76
Issuances relating to Scrip Dividend Programme, shares		113
Ending balance, shares	17,359	17,322	17,133
Ordinary shares | Share capital [member]
Reconciliation of number of shares outstanding [abstract]
Beginning Balance, equity	£ 4,331	£ 4,283
Issued to staff under share incentive plans, equity	9	19
Issuances relating to Scrip Dividend Programme, equity		29
At1 securities issuance	0	0
At1 securities redemption	0	0
Other movements	0	0
Ending Balance, equity	4,340	4,331	£ 4,283
Ordinary shares | Share premium [member]
Reconciliation of number of shares outstanding [abstract]
Beginning Balance, equity	263	28
Issued to staff under share incentive plans, equity	34	82
Issuances relating to Scrip Dividend Programme, equity		153
At1 securities issuance	0	0
At1 securities redemption	0	0
Other movements	0	0
Ending Balance, equity	£ 297	£ 263	£ 28

Ordinary shares, share premiu_4

Ordinary shares, share premium, and other equity - AT1 Equity instruments (Details) £ in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2020GBP (£)	Dec. 31, 2020USD ($)	Dec. 31, 2019GBP (£)	Dec. 31, 2019USD ($)
Other equity instruments	£ 11,172		£ 10,871
Barclays PLC [member]
Other equity instruments	11,169		10,865
AT1 equity instruments [member] | Barclays PLC [member]
Other equity instruments | $		$ 11,172		$ 10,871
AT1 equity instruments [member] | 8.0% Perpetual Subordinated Contingent Convertible Securities (EUR 1,000m) | Barclays PLC [member] | Fixed interest rate [member]
Other equity instruments	£ 0		830
Initial call date	2020
AT1 equity instruments [member] | 7.875% Perpetual Subordinated Contingent Convertible Securities | Barclays PLC [member] | Fixed interest rate [member]
Other equity instruments	£ 986		995
Initial call date	2022
AT1 equity instruments [member] | 7.875% Perpetual Subordinated Contingent Convertible Securities (USD 1,500m) | Barclays PLC [member] | Fixed interest rate [member]
Other equity instruments	£ 1,131		1,131
Initial call date	2022
AT1 equity instruments [member] | 7.25% Perpetual Subordinated Contingent Convertible Securities | Barclays PLC [member] | Fixed interest rate [member]
Other equity instruments	£ 1,245		1,245
Initial call date	2023
AT1 equity instruments [member] | 7.75% Perpetual Subordinated Contingent Convertible Securities (USD 2,500m) | Barclays PLC [member] | Fixed interest rate [member]
Other equity instruments	£ 1,925		1,925
Initial call date	2023
AT1 equity instruments [member] | 5.875% Perpetual Subordinated Contingent Convertible Securities | Barclays PLC [member] | Fixed interest rate [member]
Other equity instruments	£ 1,244		1,244
Initial call date	2024
AT1 equity instruments [member] | 8% Perpetual Subordinated Contingent Convertible Securities (USD 2,000m) | Barclays PLC [member] | Fixed interest rate [member]
Other equity instruments	£ 1,509		1,509
Initial call date	2024
AT1 equity instruments [member] | 7.125% Perpetual Subordinated Contingent Convertible Securities | Barclays PLC [member] | Fixed interest rate [member]
Other equity instruments	£ 994		996
Initial call date	2025
AT1 equity instruments [member] | 6.375% Perpetual Subordinated Contingent Convertible Securities | Barclays PLC [member] | Fixed interest rate [member]
Other equity instruments	£ 996		996
Initial call date	2025
AT1 equity instruments [member] | 6.125% Perpetual Subordinated Contingent Convertible Securities (USD 1,500m) | Barclays PLC [member] | Fixed interest rate [member]
Other equity instruments	£ 1,142		£ 0
Initial call date	2025

Ordinary shares, share premiu_5

Ordinary shares, share premium, and other equity - AT1 Equity instruments (Parenthetical) (Details) - AT1 equity instruments [member] - Barclays PLC [member] - Fixed interest rate [member] € in Millions, $ in Millions	Dec. 31, 2020EUR (€)	Dec. 31, 2020USD ($)
8.0% Perpetual Subordinated Contingent Convertible Securities (EUR 1,000m)
Notional amount | €	€ 1,000
Interest rate	8.00%	8.00%
7.875% Perpetual Subordinated Contingent Convertible Securities
Interest rate	7.875%	7.875%
7.875% Perpetual Subordinated Contingent Convertible Securities (USD 1,500m)
Notional amount		$ 1,500
Interest rate	7.875%	7.875%
7.25% Perpetual Subordinated Contingent Convertible Securities
Interest rate	7.25%	7.25%
7.75% Perpetual Subordinated Contingent Convertible Securities (USD 2,500m)
Notional amount		$ 2,500
Interest rate	7.75%	7.75%
5.875% Perpetual Subordinated Contingent Convertible Securities
Interest rate	5.875%	5.875%
8% Perpetual Subordinated Contingent Convertible Securities (USD 2,000m)
Notional amount		$ 2,000
Interest rate	8.00%	8.00%
7.125% Perpetual Subordinated Contingent Convertible Securities
Interest rate	7.125%	7.125%
6.375% Perpetual Subordinated Contingent Convertible Securities
Interest rate	6.375%	6.375%
6.125% Perpetual Subordinated Contingent Convertible Securities (USD 1,500m)
Notional amount		$ 1,500
Interest rate	6.125%	6.125%

Ordinary shares, share premiu_6

Ordinary shares, share premium, and other equity (Narrative) (Details) £ / shares in Units, € in Millions, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2020EUR (€)IssuanceRedemptions	Dec. 31, 2020GBP (£)IssuanceRedemptions£ / sharesshares	Dec. 31, 2020USD ($)IssuanceRedemptions	Dec. 31, 2019GBP (£)IssuanceRedemptionsshares		Dec. 31, 2018GBP (£)shares		May 02, 2019shares	Dec. 31, 2017GBP (£)	May 10, 2017£ / shares
Repurchase of shares		£ 1,056,000,000		£ 2,668,000,000	[1]	£ 3,582,000,000	[1]
Equity		66,882,000,000		65,660,000,000		63,779,000,000			£ 63,866,000,000
Barclays PLC [member]
Repurchase of shares		898,000,000		2,668,000,000		1,532,000,000
Equity		£ 54,872,000,000		£ 56,467,000,000		£ 54,180,000,000			39,216,000,000
Management of internal investments, loans and advances	Barclays PLC retains the discretion to manage the nature of its internal investments in subsidiaries according to their regulatory and business needs. Barclays PLC may invest capital and funding into Barclays Bank PLC, Barclays Bank UK PLC and other Group subsidiaries such as Barclays Execution Services Limited and the US Intermediate Holding Company (IHC).	Barclays PLC retains the discretion to manage the nature of its internal investments in subsidiaries according to their regulatory and business needs. Barclays PLC may invest capital and funding into Barclays Bank PLC, Barclays Bank UK PLC and other Group subsidiaries such as Barclays Execution Services Limited and the US Intermediate Holding Company (IHC).	Barclays PLC retains the discretion to manage the nature of its internal investments in subsidiaries according to their regulatory and business needs. Barclays PLC may invest capital and funding into Barclays Bank PLC, Barclays Bank UK PLC and other Group subsidiaries such as Barclays Execution Services Limited and the US Intermediate Holding Company (IHC).
Ordinary shares
Number of shares outstanding | shares		17,359		17,322		17,133
Par value per share | £ / shares		£ 0.25
Called up share capital and share premium [member]
Equity		£ 4,637,000,000		£ 4,594,000,000		£ 4,311,000,000			22,045,000,000
At1 securities issuance		0		0
At1 securities redemption		0		0
Called up share capital and share premium [member] | Barclays PLC [member]
Equity		£ 4,637,000,000		£ 4,594,000,000		4,311,000,000			22,045,000,000
Called up share capital and share premium [member] | Ordinary shares
Issued share capital | shares		17,359		17,322
Par value per share | £ / shares		£ 0.25
Called up share capital [member] | Ordinary shares
Equity		£ 4,340,000,000		£ 4,331,000,000		4,283,000,000
At1 securities issuance		0		0
At1 securities redemption		0		0
Share repurchase program [member] | Ordinary shares
Par value per share | £ / shares										£ 0.25
Number of shares authorised | shares								1,733
Repurchase of shares		0		0
Retained earnings [member]
Equity		45,527,000,000		44,204,000,000		43,460,000,000			25,522,000,000
Retained earnings [member] | Barclays PLC [member]
Equity		38,672,000,000		40,614,000,000		39,842,000,000			7,834,000,000
Other equity instruments [member]
Equity		11,172,000,000		10,871,000,000		9,632,000,000			8,941,000,000
At1 securities issuance		1,142,000,000		3,500,000,000
At1 securities redemption		831,000,000		2,262,000,000
Other equity instruments [member] | Barclays PLC [member]
Equity		£ 11,169,000,000		10,865,000,000		£ 9,633,000,000			£ 8,943,000,000
AT1 Securities [member]
Rights, preferences and restrictions attaching to class of share capital	AT1 securities rank behind the claims against Barclays PLC of 1) unsubordinated creditors; 2) claims which are expressed to be subordinated to the claims of unsubordinated creditors of Barclays PLC but not further or otherwise; or 3) claims which are, or are expressed to be, junior to the claims of other creditors of Barclays PLC, whether subordinated or unsubordinated, other than claims which rank, or are expressed to rank, pari passu with, or junior to, the claims of holders of the AT1 securities. AT1 securities are undated and are redeemable, at the option of Barclays PLC, in whole on (i) the initial call date, or on any fifth anniversary after the initial call date or (ii) any day falling in a named period ending on the initial reset date, or on any fifth anniversary after the initial reset date. In addition, the AT1 securities are redeemable, at the option of Barclays PLC, in whole in the event of certain changes in the tax or regulatory treatment of the securities. Any redemptions require the prior consent of the PRA.	AT1 securities rank behind the claims against Barclays PLC of 1) unsubordinated creditors; 2) claims which are expressed to be subordinated to the claims of unsubordinated creditors of Barclays PLC but not further or otherwise; or 3) claims which are, or are expressed to be, junior to the claims of other creditors of Barclays PLC, whether subordinated or unsubordinated, other than claims which rank, or are expressed to rank, pari passu with, or junior to, the claims of holders of the AT1 securities. AT1 securities are undated and are redeemable, at the option of Barclays PLC, in whole on (i) the initial call date, or on any fifth anniversary after the initial call date or (ii) any day falling in a named period ending on the initial reset date, or on any fifth anniversary after the initial reset date. In addition, the AT1 securities are redeemable, at the option of Barclays PLC, in whole in the event of certain changes in the tax or regulatory treatment of the securities. Any redemptions require the prior consent of the PRA.	AT1 securities rank behind the claims against Barclays PLC of 1) unsubordinated creditors; 2) claims which are expressed to be subordinated to the claims of unsubordinated creditors of Barclays PLC but not further or otherwise; or 3) claims which are, or are expressed to be, junior to the claims of other creditors of Barclays PLC, whether subordinated or unsubordinated, other than claims which rank, or are expressed to rank, pari passu with, or junior to, the claims of holders of the AT1 securities. AT1 securities are undated and are redeemable, at the option of Barclays PLC, in whole on (i) the initial call date, or on any fifth anniversary after the initial call date or (ii) any day falling in a named period ending on the initial reset date, or on any fifth anniversary after the initial reset date. In addition, the AT1 securities are redeemable, at the option of Barclays PLC, in whole in the event of certain changes in the tax or regulatory treatment of the securities. Any redemptions require the prior consent of the PRA.
Description of interest rate	AT1 securities bear a fixed rate of interest until the initial call date or the initial reset date, as the case may be. After the initial call date or the initial reset date, as the case may be, in the event that they are not redeemed, the AT1 securities will bear interest at rates fixed periodically in advance for five-year periods based on market rates.	AT1 securities bear a fixed rate of interest until the initial call date or the initial reset date, as the case may be. After the initial call date or the initial reset date, as the case may be, in the event that they are not redeemed, the AT1 securities will bear interest at rates fixed periodically in advance for five-year periods based on market rates.	AT1 securities bear a fixed rate of interest until the initial call date or the initial reset date, as the case may be. After the initial call date or the initial reset date, as the case may be, in the event that they are not redeemed, the AT1 securities will bear interest at rates fixed periodically in advance for five-year periods based on market rates.
Management of internal investments, loans and advances	All AT1 securities will be converted into ordinary shares of Barclays PLC, at a pre-determined price, should the fully loaded CET1 ratio of the Group fall below 7%	All AT1 securities will be converted into ordinary shares of Barclays PLC, at a pre-determined price, should the fully loaded CET1 ratio of the Group fall below 7%	All AT1 securities will be converted into ordinary shares of Barclays PLC, at a pre-determined price, should the fully loaded CET1 ratio of the Group fall below 7%
AT1 Securities [member] | Barclays PLC [member]
At1 securities issuance		£ 1,142,000,000	$ 1,500
At1 securities redemption	€ 1,000	831,000,000
AT1 Securities [member] | Fixed Rate Resetting Perpetual Subordinated Contingent Convertible Securities [member]
At1 securities issuance		£ 1,142,000,000		£ 3,500,000,000
Number of convertible instruments issued | Issuance	1	1	1	3
Issuance costs		£ 4,000,000		£ 11,000,000
Number of convertible instruments redeemed | Redemptions	1	1	1	3
At1 securities redemption		£ 831,000,000		£ 2,262,000,000
[1]	2019 and 2018 comparative figures have been restated to make the cash flow statement more relevant following a review of the disclosure and the accounting policies applied. Amendments have been made to the classification of cash collateral reported within cash and cash equivalents and to the presentation of items within net cash flows from operating and investing activities. Footnotes b and c below quantify the impact of the changes to the respective cash flow categories in prior periods and provide further detail .

Reserves (Details)

Reserves (Details) - GBP (£) £ in Millions	Dec. 31, 2020	Dec. 31, 2019
Disclosure of reserves within equity [line items]
Total Reserves	£ 4,461	£ 4,760
Currency translation reserve [member]
Disclosure of reserves within equity [line items]
Total Reserves	2,871	3,344
Fair value through other comprehensive income reserve [member]
Disclosure of reserves within equity [line items]
Total Reserves	5	(187)
Cash flow hedging reserve [member]
Disclosure of reserves within equity [line items]
Total Reserves	1,575	1,002
Own credit reserve [member]
Disclosure of reserves within equity [line items]
Total Reserves	(954)	(373)
Other reserves and treasury shares [member]
Disclosure of reserves within equity [line items]
Total Reserves	£ 964	£ 974

Non-controlling interests - by

Non-controlling interests - by group (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Profit attributable to non-controlling interests	£ 78	£ 80	£ 234
Equity attributable to non-controlling interest	1,085	1,231
Dividends paid to non-controlling interest	79	80
Other non-controlling interests [member]
Profit attributable to non-controlling interests	(1)	0
Equity attributable to non-controlling interest	23	11
Dividends paid to non-controlling interest	0	0
Preference shares [member]
Equity attributable to non-controlling interest	529	529
Preference shares [member] | Barclays Bank PLC [member]
Profit attributable to non-controlling interests	42	41
Equity attributable to non-controlling interest	529	529
Dividends paid to non-controlling interest	42	41
Upper Tier 2 instruments [member] | Barclays Bank PLC [member]
Profit attributable to non-controlling interests	37	39
Equity attributable to non-controlling interest	533	691
Dividends paid to non-controlling interest	£ 37	£ 39

Non-controlling interests - b_2

Non-controlling interests - by instruments (Details) - GBP (£) £ in Millions	Dec. 31, 2020	Dec. 31, 2019
Disclosure of classes of share capital [line items]
Equity attributable to non-controlling interest	£ 1,085	£ 1,231
Preference shares [member]
Disclosure of classes of share capital [line items]
Equity attributable to non-controlling interest	529	529
Preference shares [member] | Barclays Bank PLC [member]
Disclosure of classes of share capital [line items]
Equity attributable to non-controlling interest	529	529
Preference shares [member] | US Dollar Preference Shares | Barclays Bank PLC [member]
Disclosure of classes of share capital [line items]
Equity attributable to non-controlling interest	318	318
Preference shares [member] | Euro Preference Shares | Barclays Bank PLC [member]
Disclosure of classes of share capital [line items]
Equity attributable to non-controlling interest	211	211
Upper Tier 2 instruments [member] | Barclays Bank PLC [member]
Disclosure of classes of share capital [line items]
Equity attributable to non-controlling interest	533	691
Upper Tier 2 instruments [member] | Undated Floating Rate Primary Capital Notes Series 1 | Barclays Bank PLC [member] | Floating interest rate [member]
Disclosure of classes of share capital [line items]
Equity attributable to non-controlling interest	93	93
Upper Tier 2 instruments [member] | Undated Floating Rate Primary Capital Notes Series 2 | Barclays Bank PLC [member] | Floating interest rate [member]
Disclosure of classes of share capital [line items]
Equity attributable to non-controlling interest	179	179
Upper Tier 2 instruments [member] | 5.03% Undated Reverse Dual Currency Subordinated Note (JPY8bn) | Barclays Bank PLC [member]
Disclosure of classes of share capital [line items]
Equity attributable to non-controlling interest	39	39
Upper Tier 2 instruments [member] | 5.0% Reverse Dual Currency Subordinated (JPY12bn) | Barclays Bank PLC [member]
Disclosure of classes of share capital [line items]
Equity attributable to non-controlling interest	53	53
Upper Tier 2 instruments [member] | Undated Floating Rate Primary Capital Notes Series 3 (GBP 145m) | Barclays Bank PLC [member] | Floating interest rate [member]
Disclosure of classes of share capital [line items]
Equity attributable to non-controlling interest	20	20
Upper Tier 2 instruments [member] | 9% Permanent Interest Bearing Capital Bonds (GBP 100m) | Barclays Bank PLC [member]
Disclosure of classes of share capital [line items]
Equity attributable to non-controlling interest	40	40
Upper Tier 2 instruments [member] | 7.125% Undated Subordinated Notes (GBP 525m) | Barclays Bank PLC [member]
Disclosure of classes of share capital [line items]
Equity attributable to non-controlling interest	0	158
Upper Tier 2 instruments [member] | 6.125% Undated Subordinated Notes (GBP 550m) | Barclays Bank PLC [member]
Disclosure of classes of share capital [line items]
Equity attributable to non-controlling interest	34	34
Upper Tier 2 instruments [member] | 9.25% Perpetual Sub Notes (ex Woolwich) (GBP 150m) | Barclays Bank PLC [member]
Disclosure of classes of share capital [line items]
Equity attributable to non-controlling interest	£ 75	£ 75

Non-controlling interests - b_3

Non-controlling interests - by instruments (parenthetical) (Details) - Barclays Bank PLC [member] £ in Millions, ¥ in Billions	Dec. 31, 2020GBP (£)	Dec. 31, 2020JPY (¥)
Preference shares [member] | 6.278% non-cumulative callable preference shares
Disclosure of classes of share capital [line items]
Interest rate	6.278%	6.278%
Preference shares [member] | 4.75% non-cumulative callable preference shares
Disclosure of classes of share capital [line items]
Interest rate	4.75%	4.75%
Upper Tier 2 instruments [member] | 5.03% Undated Reverse Dual Currency Subordinated Note (JPY8bn)
Disclosure of classes of share capital [line items]
Interest rate	5.03%	5.03%
Notional amount | ¥		¥ 8
Upper Tier 2 instruments [member] | 5.0% Reverse Dual Currency Subordinated (JPY12bn)
Disclosure of classes of share capital [line items]
Interest rate	5.00%	5.00%
Notional amount | ¥		¥ 12
Upper Tier 2 instruments [member] | Undated Floating Rate Primary Capital Notes Series 3 (GBP 145m) | Floating interest rate [member]
Disclosure of classes of share capital [line items]
Notional amount	£ 145
Upper Tier 2 instruments [member] | 9% Permanent Interest Bearing Capital Bonds (GBP 100m)
Disclosure of classes of share capital [line items]
Interest rate	9.00%	9.00%
Notional amount	£ 100
Upper Tier 2 instruments [member] | 7.125% Undated Subordinated Notes (GBP 525m)
Disclosure of classes of share capital [line items]
Interest rate	7.125%	7.125%
Notional amount	£ 525
Upper Tier 2 instruments [member] | 6.125% Undated Subordinated Notes (GBP 550m)
Disclosure of classes of share capital [line items]
Interest rate	6.125%	6.125%
Notional amount	£ 500
Upper Tier 2 instruments [member] | 9.25% Perpetual Sub Notes (ex Woolwich) (GBP 150m)
Disclosure of classes of share capital [line items]
Interest rate	9.25%	9.25%
Notional amount	£ 150

Non-controlling interests (Narr

Non-controlling interests (Narrative) (Details)	12 Months Ended
	Dec. 31, 2020GBP (£)Issuance	Dec. 31, 2019GBP (£)Issuance
Non-controlling interests [member] | Upper Tier 2 instruments [member]
Number of instruments issued | Issuance	0	0
Instruments redeemed		£ 0
7.125% Undated Subordinated Notes | Upper Tier 2 instruments [member]
Instruments redeemed	£ 158,000,000
Barclays Bank PLC [member]
Significant restrictions to access assets	Under the terms of these instruments, Barclays PLC may not pay dividends on ordinary shares until a dividend or coupon is next paid on these instruments or the instruments are redeemed or purchased by Barclays Bank PLC. There are no restrictions on Barclays Bank PLC’s ability to remit capital to the Parent as a result of these issued instruments.
Barclays Bank PLC [member] | Barclays Bank PLC [member]
Proportion of voting interest, non-controlling	100.00%

Staff costs (Details)

Staff costs (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Incentive awards granted:
Current year bonus	£ 1,090	£ 1,058	£ 1,131
Deferred bonus	490	432	518
Total incentive awards granted	1,580	1,490	1,649
Reconciliation of incentive awards granted to income statement charge:
Less: deferred bonuses granted but not charged in current year	(335)	(293)	(359)
Add: current year charges for deferred bonuses from previous years	293	308	299
Other differences between incentive awards granted and income statement charge	(34)	(48)	(33)
Income statement charge for performance costs	1,504	1,457	1,556
Other income statement charges:
Salaries	4,322	4,332	4,200
Social security costs	613	573	558
Post-retirement benefits	519	501	619
Other compensation costs	479	480	413
Total compensation costs	7,437	7,343	7,346
Other resourcing costs
Outsourcing costs	342	433	594
Redundancy and restructuring	102	132	133
Temporary staff costs	102	256	386
Other	114	151	170
Other resourcing costs	660	972	1,283
Total staff costs	£ 8,097	£ 8,315	£ 8,629

Staff costs (Narrative) (Detail

Staff costs (Narrative) (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of net defined benefit liability (asset) [line items]
Post-retirement benefits	£ 519	£ 501	£ 619
Compensation Costs	7,437	7,343	7,346
Internally generated [member]
Disclosure of net defined benefit liability (asset) [line items]
Compensation Costs	451	439	296
Defined contribution Schemes [member]
Disclosure of net defined benefit liability (asset) [line items]
Post-retirement benefits	279	270	236
Pension defined benefit plans [member]
Disclosure of net defined benefit liability (asset) [line items]
Post-retirement benefits	£ 240	£ 231	£ 383

Share-based payments - Share ba

Share-based payments - Share based payments (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of terms and conditions of share-based payment arrangement [line items]
Total equity settled	£ 429	£ 478	£ 449
Cash settled	2	3	1
Total share based payments	431	481	450
Deferred Share Value Plan / Share Value Plan [Member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Total equity settled	245	272	262
Others
Disclosure of terms and conditions of share-based payment arrangement [line items]
Total equity settled	£ 184	£ 206	£ 187

Share-based payments - Share op

Share-based payments - Share options and awards (Details) £ / shares in Units, shares in Thousands	12 Months Ended
	Dec. 31, 2020GBP (£)shares£ / shares	Dec. 31, 2019GBP (£)shares£ / shares	Dec. 31, 2018shares
Deferred Share Value Plan / Share Value Plan [Member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Weighted average fair value per award, granted in year | £	£ 1.06	£ 1.43
Weighted average share price at exercise/ release during year | £ / shares	£ 1.24	£ 1.6
Weighted average remaining contractual life in years	1 year	1 year
Number of options/ awards outstanding | shares	416,941	331,491	274,469
Deferred Share Value Plan / Share Value Plan [Member] | Max [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Weighted average remaining contractual life in years		1 year
Others
Disclosure of terms and conditions of share-based payment arrangement [line items]
Number of options/ awards outstanding | shares	356,033	232,259	217,952
Others | Min [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Weighted average fair value per award, granted in year | £	£ 0.23	£ 0.4
Weighted average share price at exercise/ release during year | £ / shares	£ 1.04	£ 1.57
Weighted average remaining contractual life in years	0 years	0 years
Others | Max [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Weighted average fair value per award, granted in year | £	£ 1.24	£ 1.6
Weighted average share price at exercise/ release during year | £ / shares	£ 1.68	£ 1.7
Weighted average remaining contractual life in years	3 years	3 years

Share-based payments - Movement

Share-based payments - Movements in option and award plans (Details)	12 Months Ended
	Dec. 31, 2020shares£ / shares	Dec. 31, 2019shares£ / shares
Deferred Share Value Plan / Share Value Plan [Member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Outstanding at beginning of year/acquisition date, Number of options	331,491,000	274,469,000
Granted in the year, number of options	232,379,000	219,392,000
Exercised/released in the year, number of options	(132,376,000)	(145,324,000)
Less: forfeited in the year, number of options	(14,553,000)	(17,046,000)
Less: expired in the year, number of options	0	0
Outstanding at end of year, Number of options	416,941,000	331,491,000
Of which exercisable, number of options	0	0
Outstanding at beginning of year/acquisition date, Weighted average | £ / shares	£ 1.6
Outstanding at end of year, Weighted average exercise price | £ / shares	£ 1.24	£ 1.6
Others
Disclosure of terms and conditions of share-based payment arrangement [line items]
Outstanding at beginning of year/acquisition date, Number of options	232,259,000	217,952,000
Granted in the year, number of options	365,166,000	215,694,000
Exercised/released in the year, number of options	(123,042,000)	(151,827,000)
Less: forfeited in the year, number of options	(105,068,000)	(42,331,000)
Less: expired in the year, number of options	(13,282,000)	(7,229,000)
Outstanding at end of year, Number of options	356,033,000	232,259,000
Of which exercisable, number of options	30,833,000	32,376,000
Sharesave
Disclosure of terms and conditions of share-based payment arrangement [line items]
Of which exercisable, number of options	11,677,049
Outstanding at beginning of year/acquisition date, Weighted average | £ / shares	£ 1.29	£ 1.41
Granted in the year, weighted average exercise price | £ / shares	0.84	1.19
Exercised/released in the year, weighted average exercise price | £ / shares	1.22	1.21
Less: forfeited in the year, weighted average exercise price | £ / shares	1.24	1.51
Less: expired in the year, weighted average exercise price | £ / shares	1.35	2.08
Outstanding at end of year, Weighted average exercise price | £ / shares	0.96	1.29
Of which exercisable, weighted average exercise price | £ / shares	£ 1.66	£ 1.32

Share-based payments - Moveme_2

Share-based payments - Movements in options and award plans (Narrative) (Details)	12 Months Ended
	Dec. 31, 2020shares£ / shares	Dec. 31, 2019shares£ / shares
Deferred Share Value Plan / Share Value Plan [Member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Number of share options exercisable in share-based payment arrangement | shares	0	0
Outstanding at beginning of year/acquisition date, Weighted average	£ 1.6
Outstanding at end of year, Weighted average exercise price	£ 1.24	£ 1.6
Others
Disclosure of terms and conditions of share-based payment arrangement [line items]
Number of share options exercisable in share-based payment arrangement | shares	30,833,000	32,376,000
Sharesave
Disclosure of terms and conditions of share-based payment arrangement [line items]
Number of share options exercisable in share-based payment arrangement | shares	11,677,049
Outstanding at beginning of year/acquisition date, Weighted average	£ 1.29	£ 1.41
Granted in the year, weighted average exercise price	0.84	1.19
Exercised/released in the year, weighted average exercise price	1.22	1.21
Less: forfeited in the year, weighted average exercise price	1.24	1.51
Less: expired in the year, weighted average exercise price	1.35	2.08
Outstanding at end of year, Weighted average exercise price	£ 0.96	£ 1.29

Share-based payments (Narrative

Share-based payments (Narrative) (Details) - GBP (£) £ / shares in Units, £ in Millions, shares in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of terms and conditions of share-based payment arrangement [line items]
Total liability arising from cash-settled share-based payments transactions	£ 2	£ 3
Employee share schemes and hedges thereof	346	579	£ 500
Equity attributable to owners of parent [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Employee share schemes and hedges thereof	346	579	500
Retained earnings [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Employee share schemes and hedges thereof	£ 303	£ 478	£ 449
Deferred Share Value Plan / Share Value Plan [Member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Weighted average remaining contractual life in years	1 year	1 year
Deferred Share Value Plan / Share Value Plan [Member] | Max [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Weighted average remaining contractual life in years		1 year
Deferred Share Value Plan [Member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Description of share-based payment arrangement	Deferred Share Value Plan (DSVP) The DSVP was introduced in February 2017. The terms of the DSVP are materially the same as the terms of the SVP as described above, save that Executive Directors are not eligible to participate in the DSVP and the DSVP operates over market purchase shares only.
Share Value Plan [Member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Description of share-based payment arrangement	Share Value Plan (SVP) The SVP was introduced in March 2010. SVP awards have been granted to participants in the form of a conditional right to receive Barclays PLC shares or provisional allocations of Barclays PLC shares which vest or are considered for release over a period of three, five or seven years. Participants do not pay to receive an award or to receive a release of shares. For awards granted before December 2017, the grantor may also make a dividend equivalent payment to participants on release of a SVP award. SVP awards are also made to eligible employees for recruitment purposes. All awards are subject to potential forfeiture in certain leaver scenarios.
Others
Disclosure of terms and conditions of share-based payment arrangement [line items]
Description of share-based payment arrangement	Other schemes In addition to the SVP and DSVP, the Barclays Group operates a number of other schemes settled in Barclays PLC Shares including Sharesave (both UK and Ireland), Sharepurchase (both UK and overseas), and the Barclays Group Long Term Incentive Plan. A delivery of upfront shares to ‘Material Risk Takers’ can be made as a Share Incentive Award (Holding Period).
Others | Min [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Weighted average remaining contractual life in years	0 years	0 years
Others | Max [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Weighted average remaining contractual life in years	3 years	3 years
Sharesave [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Of which exercisable, weighted average exercise price	£ 1.66	£ 1.32
Sharesave [member] | Min [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Weighted average remaining contractual life in years	3 years
Expected volatility, share options granted	32.17%
Risk free interest rate, share options granted	0.02%
Sharesave [member] | Max [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Weighted average remaining contractual life in years	5 years
Expected volatility, share options granted	30.32%
Risk free interest rate, share options granted	0.08%
Employee benefit and other trusts [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Total number of Barclays shares held	17.1	13.1
Total market value of the shares held in trust	£ 22	£ 24
Of which exercisable, weighted average exercise price	£ 1.27	£ 1.8
Certain share-based payment schemes [member] | Forward contract [member] | At Cost [member] | Retained earnings [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Employee share schemes and hedges thereof	£ 126

Pensions and post-retirement be

Pensions and post-retirement benefits - Income statement charge (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
33. Pension and post-retirement benefits
Current service cost	£ 243	£ 231	£ 243
Net finance cost	(40)	(48)	(24)
Past service cost	(4)	0	134
Other movements	1	2	5
Total	£ 200	£ 185	£ 358

Pensions and post-retirement _2

Pensions and post-retirement benefits - Balance sheet reconciliation (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of net defined benefit liability (asset) [line items]
Current service cost	£ (243)	£ (231)	£ (243)
Past service cost	(4)	0	134
Interest costs or income on scheme liabilities or assets	40	48	24
Net surplus/(deficit)	1,523	1,760
Retirement benefit assets	1,814	2,108
Retirement benefit liabilities	(291)	(348)
Net retirement benefit assets/(liabilities)	1,523	1,760
United Kingdom Retirement Fund (UKRF) [member] | UK [member] | Pension defined benefit plans [member]
Disclosure of net defined benefit liability (asset) [line items]
Benefits paid	1,370	1,410
Net surplus/(deficit)	1,807	2,058
Retirement benefit assets	1,807	2,058
Retirement benefit liabilities	0	0
Net retirement benefit assets/(liabilities)	1,807	2,058
Defined benefit obligations [member]
Disclosure of net defined benefit liability (asset) [line items]
Benefit obligation at beginning of the year	(30,333)	(28,269)
Current service cost	(243)	(231)
Past service cost	(4)	0
Interest costs or income on scheme liabilities or assets	(573)	(747)
Remeasurement (loss)/gain - financial	(3,439)	(3,087)
Remeasurement gain/(loss) - demographic	(281)	223
Remeasurement gain - experience	244	277
Employee contributions	(5)	(5)
Benefits paid	1,406	1,459
Exchange and other movements	30	47
Benefit obligation at end of the year	(33,190)	(30,333)	(28,269)
Defined benefit obligations [member] | United Kingdom Retirement Fund (UKRF) [member] | UK [member] | Pension defined benefit plans [member]
Disclosure of net defined benefit liability (asset) [line items]
Benefit obligation at beginning of the year	(29,304)	(27,301)
Current service cost	(217)	(210)
Past service cost	0	0
Interest costs or income on scheme liabilities or assets	(549)	(718)
Remeasurement (loss)/gain - financial	(3,358)	(2,964)
Remeasurement gain/(loss) - demographic	(286)	214
Remeasurement gain - experience	237	266
Employee contributions	(1)	(1)
Benefits paid	1,370	1,410
Exchange and other movements	0	0
Benefit obligation at end of the year	(32,108)	(29,304)	(27,301)
Fair value of plan assets [member]
Disclosure of net defined benefit liability (asset) [line items]
Fair value of scheme assets at beginning of the year	32,093	29,722
Interest costs or income on scheme liabilities or assets	(613)	(795)
Employer contribution	265	755
Remeasurement - return on scheme assets greater/(less) than discount rate	3,411	2,312
Employee contributions	(5)	(5)
Benefits paid	1,406	1,459
Exchange and other movements	(268)	(37)
Fair value of scheme assets at end of the year	34,713	32,093	29,722
Fair value of plan assets [member] | United Kingdom Retirement Fund (UKRF) [member] | UK [member] | Pension defined benefit plans [member]
Disclosure of net defined benefit liability (asset) [line items]
Fair value of scheme assets at beginning of the year	31,362	29,036
Interest costs or income on scheme liabilities or assets	(595)	(774)
Employer contribution	248	731
Remeasurement - return on scheme assets greater/(less) than discount rate	3,328	2,230
Employee contributions	(1)	(1)
Benefits paid	1,370	1,410
Exchange and other movements	(249)	0
Fair value of scheme assets at end of the year	£ 33,915	£ 31,362	£ 29,036

Pensions and post-retirement _3

Pensions and post-retirement benefits - Actuarial valuation of schemes (Details) - United Kingdom Retirement Fund (UKRF) [member] - UK [member] - Pension defined benefit plans [member] - GBP (£) £ in Billions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Key UKRF financial assumptions [member]
Disclosure of sensitivity analysis for actuarial assumptions [line items]
Discount rate	1.29%	1.92%
Inflation rate (RPI)	2.99%	3.02%
Life expectancy at 60 for current pensioners, males [member]
Disclosure of sensitivity analysis for actuarial assumptions [line items]
Assumed life expectancy at 60	27 years 2 months 12 days	27 years 1 month 6 days	27 years 8 months 12 days
Life expectancy at 60 for current pensioners, females [member]
Disclosure of sensitivity analysis for actuarial assumptions [line items]
Assumed life expectancy at 60	29 years 4 months 24 days	29 years 3 months 18 days	29 years 4 months 24 days
Life expectancy at 60 for future pensioners at 40 years, males [member]
Disclosure of sensitivity analysis for actuarial assumptions [line items]
Assumed life expectancy at 60	29 years	28 years 10 months 24 days	29 years 2 months 12 days
Life expectancy at 60 for future pensioners at 40 years, females [member]
Disclosure of sensitivity analysis for actuarial assumptions [line items]
Assumed life expectancy at 60	31 years 2 months 12 days	31 years 1 month 6 days	31 years
0.5% change in discount rate per annum [member]
Disclosure of sensitivity analysis for actuarial assumptions [line items]
(Decrease)/Increase in UKRF defined benefit obligations, due to increase in actuarial assumption	£ (2.5)	£ (2.3)
(Decrease)/Increase in UKRF defined benefit obligations, due to decrease in actuarial assumption	2.9	2.6
0.25% change in discount rate per annum [member]
Disclosure of sensitivity analysis for actuarial assumptions [line items]
(Decrease)/Increase in UKRF defined benefit obligations, due to increase in actuarial assumption	(1.3)	(1.2)
(Decrease)/Increase in UKRF defined benefit obligations, due to decrease in actuarial assumption	1.4	1.2
0.5% change in RPI per annum [member]
Disclosure of sensitivity analysis for actuarial assumptions [line items]
(Decrease)/Increase in UKRF defined benefit obligations, due to increase in actuarial assumption	1.8	1.5
(Decrease)/Increase in UKRF defined benefit obligations, due to decrease in actuarial assumption	(1.8)	(1.4)
0.25% change in RPI per annum [member]
Disclosure of sensitivity analysis for actuarial assumptions [line items]
(Decrease)/Increase in UKRF defined benefit obligations, due to increase in actuarial assumption	0.9	0.8
(Decrease)/Increase in UKRF defined benefit obligations, due to decrease in actuarial assumption	(0.9)	(0.7)
Change in life expectancy by one year [member]
Disclosure of sensitivity analysis for actuarial assumptions [line items]
(Decrease)/Increase in UKRF defined benefit obligations, due to increase in actuarial assumption	1.2	1
(Decrease)/Increase in UKRF defined benefit obligations, due to decrease in actuarial assumption	£ (1.2)	£ (1)

Pensions and post-retirement _4

Pensions and post-retirement benefits - Analysis of scheme assets (Details) - Fair value of plan assets [member] - GBP (£) £ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of fair value of plan assets [line items]
Net retirement benefit assets/(liabilities)	£ 34,713	£ 32,093	£ 29,722
% of total fair value of scheme assets	100.00%	100.00%
Equities
Disclosure of fair value of plan assets [line items]
Equities	£ 2,065	£ 2,510
% of total fair value of scheme assets	5.90%	7.80%
Private equities
Disclosure of fair value of plan assets [line items]
Equities	£ 2,233	£ 2,083
% of total fair value of scheme assets	6.40%	6.50%
Bonds Fixed Government [Member]
Disclosure of fair value of plan assets [line items]
Bonds	£ 4,315	£ 3,874
% of total fair value of scheme assets	12.40%	12.10%
Bonds Index Linked Government [Member]
Disclosure of fair value of plan assets [line items]
Bonds	£ 11,720	£ 11,036
% of total fair value of scheme assets	33.80%	34.40%
Bonds - Corporate and Other [Member]
Disclosure of fair value of plan assets [line items]
Bonds	£ 9,117	£ 8,557
% of total fair value of scheme assets	26.30%	26.60%
Property [member]
Disclosure of fair value of plan assets [line items]
Property	£ 1,426	£ 1,644
% of total fair value of scheme assets	4.10%	5.10%
Infrastructure
Disclosure of fair value of plan assets [line items]
Infrastructure	£ 1,812	£ 1,558
% of total fair value of scheme assets	5.20%	4.90%
Cash and liquid assets
Disclosure of fair value of plan assets [line items]
Cash and liquid assets	£ 1,894	£ 766
% of total fair value of scheme assets	5.50%	2.40%
Mixed investment funds
Disclosure of fair value of plan assets [line items]
Mixed investment funds	£ 9	£ 0
% of total fair value of scheme assets	0.00%	0.00%
Other [member]
Disclosure of fair value of plan assets [line items]
Other	£ 122	£ 65
% of total fair value of scheme assets	0.40%	0.20%
Equities - Quoted [member]
Disclosure of fair value of plan assets [line items]
Net retirement benefit assets/(liabilities)	£ 23,014	£ 21,738
Equities - Quoted [member] | Equities
Disclosure of fair value of plan assets [line items]
Equities	567	942
Equities - Quoted [member] | Private equities
Disclosure of fair value of plan assets [line items]
Equities	0	0
Equities - Quoted [member] | Bonds Fixed Government [Member]
Disclosure of fair value of plan assets [line items]
Bonds	4,205	3,574
Equities - Quoted [member] | Bonds Index Linked Government [Member]
Disclosure of fair value of plan assets [line items]
Bonds	10,706	10,355
Equities - Quoted [member] | Bonds - Corporate and Other [Member]
Disclosure of fair value of plan assets [line items]
Bonds	7,439	6,260
Equities - Quoted [member] | Property [member]
Disclosure of fair value of plan assets [line items]
Property	10	11
Equities - Quoted [member] | Infrastructure
Disclosure of fair value of plan assets [line items]
Infrastructure	0	0
Equities - Quoted [member] | Cash and liquid assets
Disclosure of fair value of plan assets [line items]
Cash and liquid assets	64	596
Equities - Quoted [member] | Mixed investment funds
Disclosure of fair value of plan assets [line items]
Mixed investment funds	9	0
Equities - Quoted [member] | Other [member]
Disclosure of fair value of plan assets [line items]
Other	14	0
Equities non-quoted [member]
Disclosure of fair value of plan assets [line items]
Net retirement benefit assets/(liabilities)	11,699	10,355
Equities non-quoted [member] | Equities
Disclosure of fair value of plan assets [line items]
Equities	1,498	1,568
Equities non-quoted [member] | Private equities
Disclosure of fair value of plan assets [line items]
Equities	2,233	2,083
Equities non-quoted [member] | Bonds Fixed Government [Member]
Disclosure of fair value of plan assets [line items]
Bonds	110	300
Equities non-quoted [member] | Bonds Index Linked Government [Member]
Disclosure of fair value of plan assets [line items]
Bonds	1,014	681
Equities non-quoted [member] | Bonds - Corporate and Other [Member]
Disclosure of fair value of plan assets [line items]
Bonds	1,678	2,297
Equities non-quoted [member] | Property [member]
Disclosure of fair value of plan assets [line items]
Property	1,416	1,633
Equities non-quoted [member] | Infrastructure
Disclosure of fair value of plan assets [line items]
Infrastructure	1,812	1,558
Equities non-quoted [member] | Cash and liquid assets
Disclosure of fair value of plan assets [line items]
Cash and liquid assets	1,830	170
Equities non-quoted [member] | Mixed investment funds
Disclosure of fair value of plan assets [line items]
Mixed investment funds	0	0
Equities non-quoted [member] | Other [member]
Disclosure of fair value of plan assets [line items]
Other	108	65
United Kingdom Retirement Fund (UKRF) [member] | UK [member] | Pension defined benefit plans [member]
Disclosure of fair value of plan assets [line items]
Net retirement benefit assets/(liabilities)	£ 33,915	£ 31,362	£ 29,036
% of total fair value of scheme assets	100.00%	100.00%
United Kingdom Retirement Fund (UKRF) [member] | Equities | UK [member] | Pension defined benefit plans [member]
Disclosure of fair value of plan assets [line items]
Equities	£ 1,876	£ 2,336
% of total fair value of scheme assets	5.50%	7.40%
United Kingdom Retirement Fund (UKRF) [member] | Private equities | UK [member] | Pension defined benefit plans [member]
Disclosure of fair value of plan assets [line items]
Equities	£ 2,233	£ 2,083
% of total fair value of scheme assets	6.60%	6.60%
United Kingdom Retirement Fund (UKRF) [member] | Bonds Fixed Government [Member] | UK [member] | Pension defined benefit plans [member]
Disclosure of fair value of plan assets [line items]
Bonds	£ 4,042	£ 3,602
% of total fair value of scheme assets	11.90%	11.50%
United Kingdom Retirement Fund (UKRF) [member] | Bonds Index Linked Government [Member] | UK [member] | Pension defined benefit plans [member]
Disclosure of fair value of plan assets [line items]
Bonds	£ 11,711	£ 11,027
% of total fair value of scheme assets	34.60%	35.20%
United Kingdom Retirement Fund (UKRF) [member] | Bonds - Corporate and Other [Member] | UK [member] | Pension defined benefit plans [member]
Disclosure of fair value of plan assets [line items]
Bonds	£ 8,892	£ 8,364
% of total fair value of scheme assets	26.20%	26.70%
United Kingdom Retirement Fund (UKRF) [member] | Property [member] | UK [member] | Pension defined benefit plans [member]
Disclosure of fair value of plan assets [line items]
Property	£ 1,416	£ 1,633
% of total fair value of scheme assets	4.20%	5.20%
United Kingdom Retirement Fund (UKRF) [member] | Infrastructure | UK [member] | Pension defined benefit plans [member]
Disclosure of fair value of plan assets [line items]
Infrastructure	£ 1,812	£ 1,558
% of total fair value of scheme assets	5.30%	5.00%
United Kingdom Retirement Fund (UKRF) [member] | Cash and liquid assets | UK [member] | Pension defined benefit plans [member]
Disclosure of fair value of plan assets [line items]
Cash and liquid assets	£ 1,876	£ 745
% of total fair value of scheme assets	5.50%	2.40%
United Kingdom Retirement Fund (UKRF) [member] | Mixed investment funds | UK [member] | Pension defined benefit plans [member]
Disclosure of fair value of plan assets [line items]
Mixed investment funds	£ 0	£ 0
% of total fair value of scheme assets	0.00%	0.00%
United Kingdom Retirement Fund (UKRF) [member] | Other [member] | UK [member] | Pension defined benefit plans [member]
Disclosure of fair value of plan assets [line items]
Other	£ 57	£ 14
% of total fair value of scheme assets	0.20%	0.00%
United Kingdom Retirement Fund (UKRF) [member] | Equities - Quoted [member] | UK [member] | Pension defined benefit plans [member]
Disclosure of fair value of plan assets [line items]
Net retirement benefit assets/(liabilities)	£ 22,267	£ 21,061
United Kingdom Retirement Fund (UKRF) [member] | Equities - Quoted [member] | Equities | UK [member] | Pension defined benefit plans [member]
Disclosure of fair value of plan assets [line items]
Equities	378	768
United Kingdom Retirement Fund (UKRF) [member] | Equities - Quoted [member] | Private equities | UK [member] | Pension defined benefit plans [member]
Disclosure of fair value of plan assets [line items]
Equities	0	0
United Kingdom Retirement Fund (UKRF) [member] | Equities - Quoted [member] | Bonds Fixed Government [Member] | UK [member] | Pension defined benefit plans [member]
Disclosure of fair value of plan assets [line items]
Bonds	3,932	3,303
United Kingdom Retirement Fund (UKRF) [member] | Equities - Quoted [member] | Bonds Index Linked Government [Member] | UK [member] | Pension defined benefit plans [member]
Disclosure of fair value of plan assets [line items]
Bonds	10,697	10,345
United Kingdom Retirement Fund (UKRF) [member] | Equities - Quoted [member] | Bonds - Corporate and Other [Member] | UK [member] | Pension defined benefit plans [member]
Disclosure of fair value of plan assets [line items]
Bonds	7,214	6,069
United Kingdom Retirement Fund (UKRF) [member] | Equities - Quoted [member] | Property [member] | UK [member] | Pension defined benefit plans [member]
Disclosure of fair value of plan assets [line items]
Property	0	0
United Kingdom Retirement Fund (UKRF) [member] | Equities - Quoted [member] | Infrastructure | UK [member] | Pension defined benefit plans [member]
Disclosure of fair value of plan assets [line items]
Infrastructure	0	0
United Kingdom Retirement Fund (UKRF) [member] | Equities - Quoted [member] | Cash and liquid assets | UK [member] | Pension defined benefit plans [member]
Disclosure of fair value of plan assets [line items]
Cash and liquid assets	46	576
United Kingdom Retirement Fund (UKRF) [member] | Equities - Quoted [member] | Mixed investment funds | UK [member] | Pension defined benefit plans [member]
Disclosure of fair value of plan assets [line items]
Mixed investment funds	0	0
United Kingdom Retirement Fund (UKRF) [member] | Equities - Quoted [member] | Other [member] | UK [member] | Pension defined benefit plans [member]
Disclosure of fair value of plan assets [line items]
Other	0	0
United Kingdom Retirement Fund (UKRF) [member] | Equities non-quoted [member] | UK [member] | Pension defined benefit plans [member]
Disclosure of fair value of plan assets [line items]
Net retirement benefit assets/(liabilities)	11,648	10,301
United Kingdom Retirement Fund (UKRF) [member] | Equities non-quoted [member] | Equities | UK [member] | Pension defined benefit plans [member]
Disclosure of fair value of plan assets [line items]
Equities	1,498	1,568
United Kingdom Retirement Fund (UKRF) [member] | Equities non-quoted [member] | Private equities | UK [member] | Pension defined benefit plans [member]
Disclosure of fair value of plan assets [line items]
Equities	2,233	2,083
United Kingdom Retirement Fund (UKRF) [member] | Equities non-quoted [member] | Bonds Fixed Government [Member] | UK [member] | Pension defined benefit plans [member]
Disclosure of fair value of plan assets [line items]
Bonds	110	299
United Kingdom Retirement Fund (UKRF) [member] | Equities non-quoted [member] | Bonds Index Linked Government [Member] | UK [member] | Pension defined benefit plans [member]
Disclosure of fair value of plan assets [line items]
Bonds	1,014	682
United Kingdom Retirement Fund (UKRF) [member] | Equities non-quoted [member] | Bonds - Corporate and Other [Member] | UK [member] | Pension defined benefit plans [member]
Disclosure of fair value of plan assets [line items]
Bonds	1,678	2,295
United Kingdom Retirement Fund (UKRF) [member] | Equities non-quoted [member] | Property [member] | UK [member] | Pension defined benefit plans [member]
Disclosure of fair value of plan assets [line items]
Property	1,416	1,633
United Kingdom Retirement Fund (UKRF) [member] | Equities non-quoted [member] | Infrastructure | UK [member] | Pension defined benefit plans [member]
Disclosure of fair value of plan assets [line items]
Infrastructure	1,812	1,558
United Kingdom Retirement Fund (UKRF) [member] | Equities non-quoted [member] | Cash and liquid assets | UK [member] | Pension defined benefit plans [member]
Disclosure of fair value of plan assets [line items]
Cash and liquid assets	1,830	169
United Kingdom Retirement Fund (UKRF) [member] | Equities non-quoted [member] | Mixed investment funds | UK [member] | Pension defined benefit plans [member]
Disclosure of fair value of plan assets [line items]
Mixed investment funds	0	0
United Kingdom Retirement Fund (UKRF) [member] | Equities non-quoted [member] | Other [member] | UK [member] | Pension defined benefit plans [member]
Disclosure of fair value of plan assets [line items]
Other	£ 57	£ 14

Pensions and post-retirement _5

Pensions and post-retirement benefits - Deficit reduction contributions (Details) - United Kingdom Retirement Fund (UKRF) [member] - Pension defined benefit plans [member] - UK [member] - GBP (£) £ in Millions	Jun. 12, 2020	Dec. 31, 2020
Disclosure of fair value of plan assets [line items]
Deficit reduction contributions		£ 1,000
2020 [member] | Deficit reduction contributions 30 September 2019 valuation [member]
Disclosure of fair value of plan assets [line items]
Deficit reduction contributions	£ 500
2021 [member] | Deficit reduction contributions 30 September 2019 valuation [member] | Future commitments [member]
Disclosure of fair value of plan assets [line items]
Deficit reduction contributions		700
2022 [member] | Deficit reduction contributions 30 September 2019 valuation [member] | Future commitments [member]
Disclosure of fair value of plan assets [line items]
Deficit reduction contributions		294
2023 [member] | Deficit reduction contributions 30 September 2019 valuation [member] | Future commitments [member]
Disclosure of fair value of plan assets [line items]
Deficit reduction contributions		286
2024 [member] | Deficit reduction contributions 30 September 2019 valuation [member] | Future commitments [member]
Disclosure of fair value of plan assets [line items]
Deficit reduction contributions		286
2025 [member] | Deficit reduction contributions 30 September 2019 valuation [member] | Future commitments [member]
Disclosure of fair value of plan assets [line items]
Deficit reduction contributions		0
2026 [member] | Deficit reduction contributions 30 September 2019 valuation [member] | Future commitments [member]
Disclosure of fair value of plan assets [line items]
Deficit reduction contributions		£ 0

Pensions and post-retirement _6

Pensions and post-retirement benefits - Contributions paid (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
United Kingdom Retirement Fund (UKRF) [member] | UK [member] | Pension defined benefit plans [member]
Disclosure of fair value of plan assets [line items]
Defined benefit contributions paid	£ 748	£ 1,231	£ 741

Pensions and post-retirement _7

Pensions and post-retirement benefits (Narrative) (Details) - GBP (£) £ in Millions	Jun. 12, 2020	Dec. 11, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 11, 2020	Sep. 30, 2020	Sep. 30, 2019
Disclosure of net defined benefit liability (asset) [line items]
Surplus (deficit) in plan			£ (1,523)	£ (1,760)
Past service cost			4	0	£ (134)
Assets of benefit plan			1,814	2,108
Barclays PLC [member]
Disclosure of net defined benefit liability (asset) [line items]
Debt securities issued			3,720	2,588	9,174
Defined benefit obligations [member]
Disclosure of net defined benefit liability (asset) [line items]
Benefit obligation at end of the year			33,190	30,333	28,269
Past service cost			4	0
Benefits paid			1,406	1,459
Defined benefit obligations [member] | Overseas [member] | Pension defined benefit plans [member]
Disclosure of net defined benefit liability (asset) [line items]
Benefit obligation at end of the year			867	759
Fair value of plan assets [member]
Disclosure of net defined benefit liability (asset) [line items]
Fair value of scheme assets			34,713	32,093	29,722
Benefits paid			1,406	1,459
Fair value of plan assets [member] | Barclays PLC [member]
Disclosure of net defined benefit liability (asset) [line items]
Bonds issued
Fair value of plan assets [member] | Ordinary shares | Barclays PLC [member]
Disclosure of net defined benefit liability (asset) [line items]
Equity instruments, amount contributed to fair value of plan assets
United Kingdom Retirement Fund (UKRF) [member] | UK [member] | Pension defined benefit plans [member]
Disclosure of net defined benefit liability (asset) [line items]
Description of type of plan			The UKRF is the Group’s main scheme, representing 97% of the Group’s total retirement benefit obligations. Barclays Bank PLC is the principal employer of the UKRF. The UKRF was closed to new entrants on 1 October 2012, and comprises 10 sections
Description of regulatory framework in which plan operates			The UKRF operates under trust law and is managed and administered on behalf of the members in accordance with the terms of the Trust Deed and Rules and all relevant legislation. The Corporate Trustee is Barclays Pension Funds Trustees Limited, a private limited company and a wholly owned subsidiary of Barclays Bank PLC. The Trustee is the legal owner of the assets of the UKRF which are held separately from the assets of the Group. The Trustee Board comprises six Management Directors selected by Barclays, of whom three are independent Directors with no relationship with Barclays (and who are not members of the UKRF), plus three Member Nominated Directors selected from eligible active staff, deferred and pensioner members who apply for the role.
Surplus (deficit) in plan			£ (1,807)	(2,058)
Benefits paid			1,370	1,410
Transfers out of the fund and contribution refunds			520	580
Assets of benefit plan			1,807	2,058
Deficit reduction contributions			1,000
Estimate of contributions expected to be paid to plan for next annual reporting period			£ 959	743
Scheme as a percentage of total retirement benefit obligations			97.00%
Defined benefit contributions paid			£ 748	1,231	741
United Kingdom Retirement Fund (UKRF) [member] | UK [member] | Pension defined benefit plans [member] | Longevity swap
Disclosure of net defined benefit liability (asset) [line items]
Fair value of scheme assets
Assets of benefit plan						£ 5,000
United Kingdom Retirement Fund (UKRF) [member] | UK [member] | Pension defined benefit plans [member] | Barclays Bank PLC [member]
Disclosure of net defined benefit liability (asset) [line items]
Maximum funding deficit secured by collateral pool			9,000
United Kingdom Retirement Fund (UKRF) [member] | UK [member] | Pension defined benefit plans [member] | Barclays Bank PLC [member] | The Senior Notes [member] | Heron Issuer Limited [member]
Disclosure of net defined benefit liability (asset) [line items]
Notes issued	£ 750	£ 500
Debt securities issued	750
Regulatory capital impact	250
United Kingdom Retirement Fund (UKRF) [member] | UK [member] | Defined contribution Schemes [member]
Disclosure of net defined benefit liability (asset) [line items]
Estimate of contributions expected to be paid to plan for next annual reporting period			£ 35	33
United Kingdom Retirement Fund (UKRF) [member] | Discount rate [member] | UK [member] | Pension defined benefit plans [member]
Disclosure of net defined benefit liability (asset) [line items]
Description of methods and assumptions used in preparing sensitivity analysis for actuarial assumptions			The UKRF discount rate assumption for 2020 was based on a standard Willis Towers Watson RATE Link model. The UKRF discount rate assumption for 2019 was based on a variant of the standard Willis Towers Watson RATE Link model that included all bonds rated AA by at least one of the four major ratings agencies, and assumed that forward rates after year 30 were flat. The change in discount rate methodology as at 31 December 2020 led to a remeasurement gain of £1.2bn.
Gain (loss) on remeasurement, net defined benefit liability (asset)			£ 1,200
United Kingdom Retirement Fund (UKRF) [member] | Inflation rate [member] | UK [member] | Pension defined benefit plans [member]
Disclosure of net defined benefit liability (asset) [line items]
Description of methods and assumptions used in preparing sensitivity analysis for actuarial assumptions			The RPI inflation assumption for 2020 was set by reference to the Bank of England’s implied inflation curve. The inflation assumption incorporates a deduction of 20 basis points as an allowance for an inflation risk premium. The methodology used to derive the inflation assumptions is consistent with that used at the prior year end.
United Kingdom Retirement Fund (UKRF) [member] | Mortality rates [member] | UK [member] | Pension defined benefit plans [member]
Disclosure of net defined benefit liability (asset) [line items]
Description of methods and assumptions used in preparing sensitivity analysis for actuarial assumptions			The UKRF’s post-retirement mortality assumptions are based on a best estimate assumption derived from an analysis in 2019 of the UKRF’s own post-retirement mortality experience, and taking account of recent evidence from published mortality surveys. An allowance has been made for future mortality improvements based on the 2019 core projection model published by the Continuous Mortality Investigation Bureau subject to a long-term trend of 1.5% per annum in future improvements. The methodology used is consistent with the prior year end, except that the 2018 core projection model was used at 2019.
United Kingdom Retirement Fund (UKRF) [member] | Deficit reduction contributions 30 September 2020 valuation [member] | UK [member] | Pension defined benefit plans [member]
Disclosure of net defined benefit liability (asset) [line items]
Surplus (deficit) in plan							£ 900
United Kingdom Retirement Fund (UKRF) [member] | Deficit reduction contributions 30 September 2020 valuation [member] | UK [member] | Pension defined benefit plans [member] | Barclays Bank PLC [member] | The Senior Notes [member] | Heron Issuer Limited [member]
Disclosure of net defined benefit liability (asset) [line items]
Borrowings Maturity			These Senior Notes entitle the UKRF to semi-annual coupon payments for five years, and full repayment in cash in three equal tranches in 2023, 2024, and at final maturity in 2025.
United Kingdom Retirement Fund (UKRF) [member] | Deficit reduction contributions 30 September 2019 valuation [member] | UK [member] | Pension defined benefit plans [member]
Disclosure of net defined benefit liability (asset) [line items]
Surplus (deficit) in plan								£ 2,300
United Kingdom Retirement Fund (UKRF) [member] | Deficit reduction contributions 30 September 2019 valuation [member] | UK [member] | Pension defined benefit plans [member] | Barclays Bank PLC [member]
Disclosure of net defined benefit liability (asset) [line items]
Deficit reduction contributions	£ 500	£ 500
United Kingdom Retirement Fund (UKRF) [member] | Deficit reduction contributions 30 September 2019 valuation [member] | UK [member] | Pension defined benefit plans [member] | Barclays Bank PLC [member] | The Senior Notes [member] | Heron Issuer Limited [member]
Disclosure of net defined benefit liability (asset) [line items]
Borrowings Maturity			These Senior Notes entitle the UKRF to semi-annual coupon payments for five years, and full repayment in cash at maturity in 2024.
United Kingdom Retirement Fund (UKRF) [member] | Min [member] | UK [member] | Pension defined benefit plans [member] | Barclays Bank PLC [member]
Disclosure of net defined benefit liability (asset) [line items]
Percentage of funding deficit secured by collateral pool			100.00%
United Kingdom Retirement Fund (UKRF) [member] | Defined benefit obligations [member] | UK [member] | Pension defined benefit plans [member]
Disclosure of net defined benefit liability (asset) [line items]
Benefit obligation at end of the year			£ 32,108	29,304	27,301
Past service cost			0	0
Benefits paid			£ 1,370	1,410
Weighted average duration of the benefit payments reflected in defined benefit obligation, UKRF			17 years
Description of asset-liability matching strategies used by plan or entity to manage risk			A long-term investment strategy has been set for the UKRF, with its asset allocation comprising a mixture of equities, bonds, property and other appropriate assets. This recognises that different asset classes are likely to produce different long-term returns and some asset classes may be more volatile than others. The long-term investment strategy ensures, among other aims, that investments are adequately diversified. The UKRF also employs derivative instruments, where appropriate, to achieve a desired exposure or return, or to match assets more closely to liabilities. The value of assets shown reflects the assets held by the scheme, with any derivative holdings reflected on a fair value basis.
United Kingdom Retirement Fund (UKRF) [member] | Defined benefit obligations [member] | Min [member] | UK [member] | Pension defined benefit plans [member]
Disclosure of net defined benefit liability (asset) [line items]
Duration of expected benefits are projected to be paid out			50 years
United Kingdom Retirement Fund (UKRF) [member] | Defined benefit obligations [member] | Within 10 years | UK [member] | Pension defined benefit plans [member]
Disclosure of net defined benefit liability (asset) [line items]
Percentage of benefits are expected to be paid			25.00%
United Kingdom Retirement Fund (UKRF) [member] | Defined benefit obligations [member] | In years 11 to 20 | UK [member] | Pension defined benefit plans [member]
Disclosure of net defined benefit liability (asset) [line items]
Percentage of benefits are expected to be paid			30.00%
United Kingdom Retirement Fund (UKRF) [member] | Defined benefit obligations [member] | In years 20 to 30 | UK [member] | Pension defined benefit plans [member]
Disclosure of net defined benefit liability (asset) [line items]
Percentage of benefits are expected to be paid			25.00%
United Kingdom Retirement Fund (UKRF) [member] | Fair value of plan assets [member] | UK [member]
Disclosure of net defined benefit liability (asset) [line items]
Percentage of fair value of scheme assets invested in liability driven investment strategies			45.00%
United Kingdom Retirement Fund (UKRF) [member] | Fair value of plan assets [member] | UK [member] | Pension defined benefit plans [member]
Disclosure of net defined benefit liability (asset) [line items]
Fair value of scheme assets			£ 33,915	31,362	29,036
Benefits paid			£ 1,370	1,410
Afterwork [member] | UK [member] | Pension defined benefit plans [member]
Disclosure of net defined benefit liability (asset) [line items]
Description of type of plan			Afterwork, which comprises a contributory cash balance defined benefit element, and a voluntary defined contribution element. The cash balance element is accrued each year and revalued until Normal Retirement Age in line with the increase in Retail Price Index (RPI) (up to a maximum of 5% p.a.). An increase of up to 2% a year may also be added at Barclays’ discretion. The costs of ill-health retirements and death in service benefits for Afterwork members are borne by the UKRF.
Description of risks to which plan exposes entity			The main risks that Barclays runs in relation to Afterwork are limited although additional contributions are required if pre-retirement investment returns are not sufficient to provide for the benefits.
1964 Pension Scheme [member] | UK [member] | Pension defined benefit plans [member]
Disclosure of net defined benefit liability (asset) [line items]
Description of type of plan			The 1964 Pension Scheme. Most employees recruited before July 1997 built up benefits in this non-contributory defined benefit scheme in respect of service up to 31 March 2010. Pensions were calculated by reference to service and pensionable salary. From 1 April 2010, members became eligible to accrue future service benefits in either Afterwork or the Pension Investment Plan (PIP), a historic defined contribution section which is now closed to future contributions.
Description of risks to which plan exposes entity			The risks that Barclays runs in relation to the 1964 section are typical of final salary pension schemes, principally that investment returns fall short of expectations, that inflation exceeds expectations, and that retirees live longer than expected.
BPSP [member] | UK [member] | Pension defined benefit plans [member]
Disclosure of net defined benefit liability (asset) [line items]
Description of type of plan			The BPSP is a defined contribution scheme providing benefits for all new UK hires from 1 October 2012, BPSP is not subject to the same investment return, inflation or life expectancy risks for Barclays that defined benefit schemes are. Members’ benefits reflect contributions paid and the level of investment returns achieved.
Description of regulatory framework in which plan operates			The BPSP is a Group Personal Pension arrangement which operates as a collection of personal pension plans. Each personal pension plan is a direct contract between the employee and the BPSP provider (Legal & General Assurance Society Limited), and is regulated by the FCA.
BPSP [member] | UK [member] | Defined contribution Schemes [member]
Disclosure of net defined benefit liability (asset) [line items]
Estimate of contributions expected to be paid to plan for next annual reporting period			£ 209	185
Other [member]
Disclosure of net defined benefit liability (asset) [line items]
Description of type of plan			Apart from the UKRF and the BPSP, Barclays operates a number of smaller pension and long-term employee benefits and post-retirement healthcare plans globally, the largest of which are the US defined benefit schemes. Many of the schemes are funded, with assets backing the obligations held in separate legal vehicles such as trusts. Others are operated on an unfunded basis. The benefits provided, the approach to funding, and the legal basis of the schemes, reflect local environments.
Description of regulatory framework in which plan operates			Similar principles of pension governance apply to the Group’s other pension schemes, depending on local legislation.
Other [member] | Defined benefit obligations [member] | Post-employment medical defined benefit plans [member]
Disclosure of net defined benefit liability (asset) [line items]
Benefit obligation at end of the year			£ 215	202
Section 75 contributions [member]
Disclosure of net defined benefit liability (asset) [line items]
Defined benefit contributions paid

Principal subsidiaries - Signif

Principal subsidiaries - Significant subsidiaries (Details)	12 Months Ended
	Dec. 31, 2020
Disclosure of subsidiaries [line items]
Nature of business	The Group is a major global financial services provider engaged in retail banking, credit cards, wholesale banking, investment banking, wealth management and investment management services. In addition, separate financial statements have been presented for the holding company.
Barclays Bank PLC [member]
Disclosure of subsidiaries [line items]
Company Name	Barclays Bank PLC
Principal place of business or incorporation	United Kingdom
Nature of business	Banking, holding company
Percentage of voting rights held	100.00%
Proportion of ownership interest, non-controlling	2.00%
Proportion of voting interest, non-controlling	0.00%
Barclays Bank UK PLC [member]
Disclosure of subsidiaries [line items]
Company Name	Barclays Bank UK PLC
Principal place of business or incorporation	United Kingdom
Nature of business	Banking, holding company
Percentage of voting rights held	100.00%
Proportion of ownership interest, non-controlling	0.00%
Proportion of voting interest, non-controlling	0.00%
Barclays Bank Ireland PLC [member]
Disclosure of subsidiaries [line items]
Company Name	Barclays Bank Ireland PLC
Principal place of business or incorporation	Ireland
Nature of business	Banking
Percentage of voting rights held	100.00%
Proportion of ownership interest, non-controlling	0.00%
Proportion of voting interest, non-controlling	0.00%
Barclays Executive Services Limited [member]
Disclosure of subsidiaries [line items]
Company Name	Barclays Execution Services Limited
Principal place of business or incorporation	United Kingdom
Nature of business	Service company
Percentage of voting rights held	100.00%
Proportion of ownership interest, non-controlling	0.00%
Proportion of voting interest, non-controlling	0.00%
Barclays Capital Inc [member]
Disclosure of subsidiaries [line items]
Company Name	Barclays Capital Inc.
Principal place of business or incorporation	United States
Nature of business	Securities dealing
Percentage of voting rights held	100.00%
Proportion of ownership interest, non-controlling	0.00%
Proportion of voting interest, non-controlling	0.00%
Barclays Capital Securities Limited [member]
Disclosure of subsidiaries [line items]
Company Name	Barclays Capital Securities Limited
Principal place of business or incorporation	United Kingdom
Nature of business	Securities dealing
Percentage of voting rights held	100.00%
Proportion of ownership interest, non-controlling	0.00%
Proportion of voting interest, non-controlling	0.00%
Barclays Securities Japan Limited [member]
Disclosure of subsidiaries [line items]
Company Name	Barclays Securities Japan Limited
Principal place of business or incorporation	Japan
Nature of business	Securities dealing
Percentage of voting rights held	100.00%
Proportion of ownership interest, non-controlling	0.00%
Proportion of voting interest, non-controlling	0.00%
Barclays US LLC [member]
Disclosure of subsidiaries [line items]
Company Name	Barclays US LLC
Principal place of business or incorporation	United States
Nature of business	Holding company
Percentage of voting rights held	100.00%
Proportion of ownership interest, non-controlling	0.00%
Proportion of voting interest, non-controlling	0.00%
Barclays Bank Delaware [member]
Disclosure of subsidiaries [line items]
Company Name	Barclays Bank Delaware
Principal place of business or incorporation	United States
Nature of business	Credit card issuer
Percentage of voting rights held	100.00%
Proportion of ownership interest, non-controlling	0.00%
Proportion of voting interest, non-controlling	0.00%

Principal subsidiaries - Exclud

Principal subsidiaries - Excluded from consolidation because the Group does not have exposure to its variable returns (Details) - Unconsolidated structured entities [member] £ in Millions	12 Months Ended
	Dec. 31, 2020GBP (£)
Disclosure of unconsolidated structured entities [line items]
Country of registration or incorporation	Cayman Islands
Company Name	Palomino Limited
Percentage of voting rights held	100.00%
Equity shareholder's funds	£ 0
Retained profit for the year	£ 0

Principal subsidiaries (Narrati

Principal subsidiaries (Narrative) (Details) - GBP (£) £ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of subsidiaries [line items]
Assets	£ 1,349,514	£ 1,140,229	£ 1,133,300
Liabilities	1,282,632	1,074,569
Balances with banks and other regulatory authorities	3,392	4,893	£ 4,717
Principal Subsidiary companies [member]
Disclosure of subsidiaries [line items]
Assets	1,795,000	1,474,000
Liabilities	£ 1,703,000	£ 1,388,000

Structured entities - Summary o

Structured entities - Summary of interests in unconsolidated structured entities (Details) - GBP (£) £ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of unconsolidated structured entities [line items]
Trading portfolio assets	£ 127,950	£ 114,195
Financial assets at fair value through the income statement	175,151	133,086
Derivative financial instruments	302,446	229,236
Financial assets at fair value through other comprehensive income	78,688	65,750
Loans and advances at amortised cost	342,632	339,115
Reverse repurchase agreements	9,031	3,379
Other assets	2,622	3,089
Total assets	1,349,514	1,140,229	£ 1,133,300
Derivative financial instruments	300,775	229,204
Structured entities [member]
Disclosure of unconsolidated structured entities [line items]
Trading portfolio assets	11,361	9,661
Financial assets at fair value through the income statement	59,129	35,518
Derivative financial instruments	2,968	2,369
Financial assets at fair value through other comprehensive income	153	391
Loans and advances at amortised cost	20,946	19,061
Reverse repurchase agreements	10	77
Other assets	16	28
Total assets	94,583	67,105
Derivative financial instruments	7,075	5,608
Secured financings [member]
Disclosure of unconsolidated structured entities [line items]
Trading portfolio assets	0	0
Financial assets at fair value through the income statement	56,265	32,859
Derivative financial instruments	0	0
Financial assets at fair value through other comprehensive income	0	0
Loans and advances at amortised cost	0	0
Reverse repurchase agreements	10	77
Other assets	0	0
Total assets	56,275	32,936
Derivative financial instruments	0	0
Short-term traded interests [Member]
Disclosure of unconsolidated structured entities [line items]
Trading portfolio assets	11,361	9,585
Financial assets at fair value through the income statement	0	0
Derivative financial instruments	0	0
Financial assets at fair value through other comprehensive income	0	0
Loans and advances at amortised cost	0	0
Reverse repurchase agreements	0	0
Other assets	0	0
Total assets	11,361	9,585
Derivative financial instruments	0	0
Traded derivatives [Member]
Disclosure of unconsolidated structured entities [line items]
Trading portfolio assets	0	0
Financial assets at fair value through the income statement	0	0
Derivative financial instruments	2,968	2,369
Financial assets at fair value through other comprehensive income	0	0
Loans and advances at amortised cost	0	0
Reverse repurchase agreements	0	0
Other assets	0	0
Total assets	2,968	2,369
Derivative financial instruments	7,075	3,171
Other interests [member]
Disclosure of unconsolidated structured entities [line items]
Trading portfolio assets	0	76
Financial assets at fair value through the income statement	2,864	2,659
Derivative financial instruments	0	0
Financial assets at fair value through other comprehensive income	153	391
Loans and advances at amortised cost	20,946	19,061
Reverse repurchase agreements	0	0
Other assets	16	28
Total assets	23,979	22,215
Derivative financial instruments	£ 0	£ 2,437

Structured entities - Nature of

Structured entities - Nature of interests (Details) - GBP (£) £ in Millions	Dec. 31, 2020	Dec. 31, 2019
Disclosure of unconsolidated structured entities [line items]
Trading portfolio assets	£ 127,950	£ 114,195
Financial assets at fair value through the income statement	175,151	133,086
Financial assets at fair value through other comprehensive income	78,688	65,750
Loans and advances at amortised cost	342,632	339,115
Other assets	2,622	3,089
Loans and advances [member]
Disclosure of unconsolidated structured entities [line items]
Financial assets at fair value through other comprehensive income	191	624
Loans and advances [member] | Financial assets at amortised cost [member]
Disclosure of unconsolidated structured entities [line items]
Total on balance sheet exposures	342,632	339,115
Debt securities [member]
Disclosure of unconsolidated structured entities [line items]
Financial assets at fair value through other comprehensive income	77,736	64,103
Equity securities [member]
Disclosure of unconsolidated structured entities [line items]
Financial assets at fair value through other comprehensive income	761	1,023
Unconsolidated structured entities [member]
Disclosure of unconsolidated structured entities [line items]
Trading portfolio assets	11,361	9,661
Financial assets at fair value through the income statement	59,129	35,518
Financial assets at fair value through other comprehensive income	153	391
Loans and advances at amortised cost	20,946	19,061
Other assets	16	28
Other interests [member]
Disclosure of unconsolidated structured entities [line items]
Trading portfolio assets	0	76
Financial assets at fair value through the income statement	2,864	2,659
Financial assets at fair value through other comprehensive income	153	391
Loans and advances at amortised cost	20,946	19,061
Other assets	16	28
Total on balance sheet exposures	23,979	22,215
Total off balance sheet notional amounts	19,305	14,021
Maximum exposure to loss	43,284	36,236
Total assets of the entity	282,891	257,996
Other interests [member] | Financial assets at amortised cost [member]
Disclosure of unconsolidated structured entities [line items]
Loans and advances at amortised cost	20,946
Other interests [member] | Loans and advances [member]
Disclosure of unconsolidated structured entities [line items]
Financial assets at fair value through the income statement		19,061
Multi-seller conduit programmes [member]
Disclosure of unconsolidated structured entities [line items]
Trading portfolio assets	0	0
Financial assets at fair value through the income statement	0	0
Financial assets at fair value through other comprehensive income	0	0
Other assets	8	17
Total on balance sheet exposures	5,154	5,947
Total off balance sheet notional amounts	11,750	8,649
Maximum exposure to loss	16,904	14,596
Total assets of the entity	87,004	78,716
Multi-seller conduit programmes [member] | Financial assets at amortised cost [member]
Disclosure of unconsolidated structured entities [line items]
Loans and advances at amortised cost	5,146
Multi-seller conduit programmes [member] | Loans and advances [member]
Disclosure of unconsolidated structured entities [line items]
Financial assets at fair value through the income statement		5,930
Lending [member]
Disclosure of unconsolidated structured entities [line items]
Trading portfolio assets	0	0
Financial assets at fair value through the income statement	98	159
Financial assets at fair value through other comprehensive income	106	0
Other assets	3	4
Total on balance sheet exposures	12,928	8,295
Total off balance sheet notional amounts	7,555	3,751
Maximum exposure to loss	20,483	12,046
Total assets of the entity	159,804	145,181
Lending [member] | Financial assets at amortised cost [member]
Disclosure of unconsolidated structured entities [line items]
Loans and advances at amortised cost	12,721
Lending [member] | Loans and advances [member]
Disclosure of unconsolidated structured entities [line items]
Financial assets at fair value through the income statement		8,132
Others [member]
Disclosure of unconsolidated structured entities [line items]
Trading portfolio assets	0	76
Financial assets at fair value through the income statement	2,766	2,500
Financial assets at fair value through other comprehensive income	47	391
Other assets	5	7
Total on balance sheet exposures	5,897	7,973
Total off balance sheet notional amounts	0	1,621
Maximum exposure to loss	5,897	9,594
Total assets of the entity	36,083	34,099
Others [member] | Financial assets at amortised cost [member]
Disclosure of unconsolidated structured entities [line items]
Loans and advances at amortised cost	£ 3,079
Others [member] | Loans and advances [member]
Disclosure of unconsolidated structured entities [line items]
Financial assets at fair value through the income statement		£ 4,999

Structured entities (Narrative)

Structured entities (Narrative) (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of unconsolidated structured entities [line items]
Impairment cost of loan facilities	£ 5,237	£ 2,036	£ 1,663
Assets transferred to sponsored unconsolidated structured entities	730	471
Structured entities [member]
Disclosure of unconsolidated structured entities [line items]
Short term traded interest	10,682	8,903
Structured entities [member] | Derivatives [member]
Disclosure of unconsolidated structured entities [line items]
Notional value of guarantee	153,894	314,170
Recourse to transferred assets only [member] | Debt securities [member]
Disclosure of unconsolidated structured entities [line items]
Short term traded interest	11,361	9,585
Commercial paper (CP) and medium-term note conduits [member] | Contractual Backstop Liquidity Facilities [Member]
Disclosure of unconsolidated structured entities [line items]
Undrawn contractual backstop liquidity facilities	11,700	8,300
Lending [member] | Debt securities [member]
Disclosure of unconsolidated structured entities [line items]
Impairment cost of loan facilities	23	7
Employee benefit and other trusts [member]
Disclosure of unconsolidated structured entities [line items]
Undrawn contractual backstop liquidity facilities	£ 2,900	£ 2,500

Investments in associates and_3

Investments in associates and joint ventures (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of associates and joint ventures [line items]
Investments in associates accounted for using equity method	£ 464	£ 457
Held at fair value through profit or loss, Associates	0	0
Investments in associates	464	457
Investments in joint ventures accounted for using equity method	317	264
Held at fair value through profit or loss, Joint ventures	437	516
Investments in joint ventures	754	780
Equity accounted	781	721
Held at fair value through profit or loss	437	516
Total	1,218	1,237
Joint ventures [member]
Disclosure of associates and joint ventures [line items]
Profit/(loss) from continuing operations	24	43
Other comprehensive income / (expenses)	(6)	2
Total comprehensive income/(loss) from continuing operations	18	45
Associates [member]
Disclosure of associates and joint ventures [line items]
Profit/(loss) from continuing operations	(24)	10
Other comprehensive income / (expenses)	(3)	0
Total comprehensive income/(loss) from continuing operations	£ (27)	£ 10

Investments in associates and_4

Investments in associates and joint ventures (Narrative) (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Min [member]
Disclosure of associates and joint ventures [line items]
Voting rights, Associates	20.00%
Max [member]
Disclosure of associates and joint ventures [line items]
Voting rights, Associates	50.00%
Associates [member] | Joint ventures [member]
Disclosure of associates and joint ventures [line items]
Unrecognised share of losses of associates and joint ventures
Unutilised credit facilities	1,897	1,726
Commitments in relation to joint ventures and associates	£ 443	£ 403

Securitisations - Transfers of

Securitisations - Transfers of financial assets that do not result in derecognition (Details) - GBP (£) £ in Millions	Dec. 31, 2020	Dec. 31, 2019
Disclosure of transferred financial assets that are not derecognised in their entirety [line items]
Assets carrying amount	£ 214,266	£ 188,668
Liabilities carry amount	(129,058)	(116,322)
Credit cards, unsecured loans and other retail lending [member] | Financial assets at amortised cost, category [member]
Disclosure of transferred financial assets that are not derecognised in their entirety [line items]
Assets carrying amount	1,033	3,516
Assets Fair value	1,121	3,678
Liabilities carry amount	(1,019)	(2,918)
Liabilities fair value	£ (1,033)	£ (2,922)

Securitisations - Continuing in

Securitisations - Continuing involvement in financial assets that have been derecognised (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of continuing involvement in derecognised financial assets [line items]
Carrying amount	£ 348	£ 189
Fair value	342	188
Maximum exposure to loss	348	189
Gain (loss) from continuing involvement for the year	4	1
Gain (loss) from continuing involvement, cumulative	8	4
Asset-backed securities [member]
Disclosure of continuing involvement in derecognised financial assets [line items]
Carrying amount	56
Fair value	56
Maximum exposure to loss	56
Gain (loss) from continuing involvement for the year	1
Gain (loss) from continuing involvement, cumulative	1
Residential Mortgage Backed Securities [Member]
Disclosure of continuing involvement in derecognised financial assets [line items]
Carrying amount	49
Fair value	49
Maximum exposure to loss	49
Gain (loss) from continuing involvement for the year	1
Gain (loss) from continuing involvement, cumulative	1
Commercial mortgage backed security [member]
Disclosure of continuing involvement in derecognised financial assets [line items]
Carrying amount	243	189
Fair value	237	188
Maximum exposure to loss	243	189
Gain (loss) from continuing involvement for the year	2	1
Gain (loss) from continuing involvement, cumulative	£ 6	£ 4

Assets pledged, collateral re_3

Assets pledged, collateral received and assets transferred - Carrying amount of the assets pledged as security against liabilities (Details) - GBP (£) £ in Millions	Dec. 31, 2020	Dec. 31, 2019
Disclosure of offsetting of financial liabilities [line items]
Assets pledged	£ 214,266	£ 188,668
Loans and advances [member]
Disclosure of offsetting of financial liabilities [line items]
Assets pledged	37,257	39,354
Trading portfolio assets [member]
Disclosure of offsetting of financial liabilities [line items]
Assets pledged	77,198	65,532
Financial assets at fair value through the income statement [member]
Disclosure of offsetting of financial liabilities [line items]
Assets pledged	5,584	10,104
Financial assets at fair value through other comprehensive income [member]
Disclosure of offsetting of financial liabilities [line items]
Assets pledged	22,185	9,278
Cash collateral and settlement balances [member]
Disclosure of offsetting of financial liabilities [line items]
Assets pledged	£ 72,042	£ 64,400

Assets pledged, collateral re_4

Assets pledged, collateral received and assets transferred - Transferred financial assets and the associated liabilities (Details) - GBP (£) £ in Millions	Dec. 31, 2020	Dec. 31, 2019
Disclosure of transferred financial assets that are not derecognised in their entirety [line items]
Transferred assets, carrying value	£ 214,266	£ 188,668
Liabilities carry amount	(129,058)	(116,322)
Derivatives [member]
Disclosure of transferred financial assets that are not derecognised in their entirety [line items]
Transferred assets, carrying value	77,574	68,609
Liabilities carry amount	(77,574)	(68,609)
Repurchase agreements [member]
Disclosure of transferred financial assets that are not derecognised in their entirety [line items]
Transferred assets, carrying value	65,673	52,840
Liabilities carry amount	(44,076)	(35,708)
Securities lending [member]
Disclosure of transferred financial assets that are not derecognised in their entirety [line items]
Transferred assets, carrying value	61,183	49,106
Liabilities carry amount	0	0
Other [member]
Disclosure of transferred financial assets that are not derecognised in their entirety [line items]
Transferred assets, carrying value	9,836	18,113
Liabilities carry amount	£ (7,408)	£ (12,005)

Assets pledged, collateral re_5

Assets pledged, collateral received and assets transferred - Recourse to transferred assets (Details) - GBP (£) £ in Millions	Dec. 31, 2020	Dec. 31, 2019
Disclosure of transferred financial assets that are not derecognised in their entirety [line items]
Transferred assets, carrying value	£ 214,266	£ 188,668
Liabilities carry amount	(129,058)	(116,322)
Other [member]
Disclosure of transferred financial assets that are not derecognised in their entirety [line items]
Transferred assets, carrying value	9,836	18,113
Liabilities carry amount	(7,408)	(12,005)
Other [member] | Recourse to transferred assets only [member]
Disclosure of transferred financial assets that are not derecognised in their entirety [line items]
Transferred assets, carrying value	1,033	3,516
Liabilities carry amount	(1,019)	(2,918)
Transferred assets, fair value	1,121	3,678
Liabilities fair value	(1,033)	(2,922)
Net position	£ 88	£ 756

Assets pledged, collateral re_6

Assets pledged, collateral received and assets transferred - Fair value at the balance sheet date of collateral accepted and re-pledged to others (Details) - GBP (£) £ in Millions	Dec. 31, 2020	Dec. 31, 2019
38. Assets pledged, collateral received and assets transferred
Fair value of securities accepted as collateral	£ 793,573	£ 656,598
Of which fair value of securities re-pledged/transferred to others	£ 685,300	£ 554,988

Assets pledged, collateral re_7

Assets pledged, collateral received and assets transferred (Narrative) (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of unconsolidated structured entities [line items]
Description of terms and conditions of financial assets pledged as collateral for liabilities or contingent liabilities	Assets are pledged or transferred as collateral to secure liabilities under repurchase agreements, securitisations and stock lending agreements or as security deposits relating to derivatives. Assets transferred are non-cash assets transferred to a third party that do not qualify for derecognition from the Group balance sheet, for example because Barclays retains substantially all the exposure to those assets under an agreement to repurchase them in the future for a fixed price. Assets pledged or transferred as collateral include all assets categorised as encumbered in the disclosure on pages 222 to 223 of the Barclays PLC Pillar 3 Report 2020 (unaudited), other than those held in commercial paper conduits. In these transactions, the Group will be required to step in to provide financing itself under a liquidity facility if the vehicle cannot access the commercial paper market. Where non-cash assets are pledged or transferred as collateral for cash received, the asset continues to be recognised in full, and a related liability is also recognised on the balance sheet. Where non-cash assets are pledged or transferred as collateral in an exchange for non-cash assets, the transferred asset continues to be recognised in full, and there is no associated liability as the non-cash collateral received is not recognised on the balance sheet. The Group is unable to use, sell or pledge the transferred assets for the duration of the transaction and remains exposed to interest rate risk and credit risk on these pledged assets. Unless stated, the counterparty's recourse is not limited to the transferred assets.
Loans and advances	£ 342,632	£ 339,115
Asset backed funding programmes [member]
Disclosure of unconsolidated structured entities [line items]
Loans and advances	£ 6,300	£ 12,000

Related party transactions an_2

Related party transactions and Directors' remuneration - Group's financial statements (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of transactions between related parties [line items]
Total income	£ 21,766	£ 21,632	£ 21,136
Credit impairment charges	(4,838)	(1,912)	(1,468)
Operating expenses	(13,886)	(15,434)	(16,243)
Assets	1,349,514	1,140,229	£ 1,133,300
Liabilities	1,282,632	1,074,569
Associates [member]
Disclosure of transactions between related parties [line items]
Total income	0	0
Credit impairment charges	0	0
Operating expenses	(26)	(46)
Assets	0	0
Liabilities	66	0
Joint Ventures [member]
Disclosure of transactions between related parties [line items]
Total income	10	12
Credit impairment charges	0	0
Operating expenses	0	0
Assets	1,388	1,303
Liabilities	0	0
Pension funds [member]
Disclosure of transactions between related parties [line items]
Total income	5	5
Credit impairment charges	0	0
Operating expenses	(1)	0
Assets	4	3
Liabilities	£ 69	£ 75

Related party transactions an_3

Related party transactions and Directors' remuneration - Loans and deposits outstanding (Details) - Key Management Personnel and persons connected to them [member] - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of transactions between related parties [line items]
Loans outstanding beginning balance	£ 7.2	£ 7.2
Loans issued during the year	2.3	4.8
Loan repayments during the year/change of key management personnel	(0.3)	(4.8)
Loan outstanding ending balance	9.2	7.2
Deposits outstanding beginning balance	12.1	6.9
Deposits received during the year	41.6	36
Deposits repaid during the year/change of key management personnel	(43.3)	(30.8)
Deposits oustanding ending balance	£ 10.4	£ 12.1

Related party transactions an_4

Related party transactions and Directors' remuneration - Remuneration of Directors and other Key Management Personnel (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
39. Related party transactions and Directors' remuneration
Salaries and other short-term benefits	£ 41.6	£ 38.5
Pension costs	0	0.1
Other long-term benefits	8.2	8.7
Share-based payments	13.2	13.4
Employer social security charges on emoluments	7.2	7.4
Costs recognised for accounting purposes	70.2	68.1
Employer social security charges on emoluments	(7.2)	(7.4)
Other long-term benefits - difference between awards granted and costs recognised	0	(0.6)
Share-based payments - difference between awards granted and costs recognised	1.1	2.2
Total remuneration awarded	£ 64.1	£ 62.3

Related party transactions an_5

Related party transactions and Directors' remuneration - Disclosure required by the Companies Act 2006 (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
39. Related party transactions and Directors' remuneration
Aggregate emoluments	£ 8.4	£ 8.5
Amounts paid under LTIPs	0	0.8
Total directors expense in accordance with companies act 2006	£ 8.4	£ 9.3

Related party transactions an_6

Related party transactions and Directors' remuneration - Disclosure required by the Companies Act 2006 (Narrative) (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of transactions between related parties [line items]
Aggregate emoluments	£ 8.4	£ 8.5
Directors [member] | Deferred Share Value Plan / Share Value Plan [Member]
Disclosure of transactions between related parties [line items]
Aggregate emoluments	£ 0.6	£ 2

Related party transactions an_7

Related party transactions and Directors' remuneration (Narrative) (Details)	12 Months Ended
	Dec. 31, 2020GBP (£)sharesEmployees£ / shares	Dec. 31, 2019GBP (£)sharesEmployees	Dec. 31, 2018GBP (£)Employees
Disclosure of transactions between related parties [line items]
Allowances for impairment recognised	£ 5,084,000,000	£ 2,028,000,000	£ 1,660,000,000
Number of employees (full time equivalent) | Employees	83,000	80,800	83,500
Accruing benefits under defined benefit scheme	£ 519,000,000	£ 501,000,000	£ 619,000,000
Pension defined benefit plans [member]
Disclosure of transactions between related parties [line items]
Accruing benefits under defined benefit scheme	240,000,000	231,000,000	383,000,000
Pension defined benefit plans [member] | United Kingdom Retirement Fund (UKRF) [member] | UK [member]
Disclosure of transactions between related parties [line items]
Pension contributions paid to defined contributions schemes	748,000,000	1,231,000,000	741,000,000
Defined contribution plans [member]
Disclosure of transactions between related parties [line items]
Accruing benefits under defined benefit scheme	£ 279,000,000	£ 270,000,000	£ 236,000,000
Others
Disclosure of transactions between related parties [line items]
Options to purchase shares held | shares	30,833,000	32,376,000
Sharesave
Disclosure of transactions between related parties [line items]
Options to purchase shares held | shares	11,677,049
Ordinary share capital
Disclosure of transactions between related parties [line items]
Par value per share | £ / shares	£ 0.25
Key Management Personnel and persons connected to them [member]
Disclosure of transactions between related parties [line items]
Allowances for impairment recognised	£ 0
Total commitments outstanding	900,000	£ 800,000
Advances and credits available	2,300,000	4,800,000
Directors [member]
Disclosure of transactions between related parties [line items]
Accruing benefits under defined benefit scheme	0
Advances and credits available	100,000	300,000
Total value of guarantees entered into on behalf of Directors
Directors [member] | Defined contribution plans [member]
Disclosure of transactions between related parties [line items]
Pension contributions paid to defined contributions schemes	0
Notional amount	£ 0	£ 0
Directors and officers [member] | Ordinary share capital
Disclosure of transactions between related parties [line items]
Number of employees (full time equivalent) | Employees	26
Number of shares issued and fully paid | shares	27,470,067	22,789,126
Par value per share | £ / shares	£ 0.25
Percentage of ordinary share capital outstanding	0.16%
Directors and officers [member] | Ordinary share capital | Sharesave
Disclosure of transactions between related parties [line items]
Number of employees (full time equivalent) | Employees	16
Par value per share | £ / shares	£ 0.25
Options to purchase shares held | shares	78,495	40,428
Share price | £ / shares	£ 101
Pension funds [member]
Disclosure of transactions between related parties [line items]
Derivatives transacted	£ 13,000,000	£ 6,000,000

Auditor's remuneration (Details

Auditor's remuneration (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of products and services [line items]
Audit of the Group's annual accounts	£ 9	£ 10	£ 8
Total Auditor's remuneration	59	56	51
Subsidiaries [member]
Disclosure of products and services [line items]
Audit of the Group's annual accounts	38	35	32
Other audit related fees [member]
Disclosure of products and services [line items]
Other services	10	9	9
Other services [member]
Disclosure of products and services [line items]
Other services	£ 2	£ 2	£ 2

Auditor's remuneration (Narrati

Auditor's remuneration (Narrative) (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of products and services [line items]
Audit fees	£ 9	£ 10	£ 8
KPMG
Disclosure of products and services [line items]
Audit fees	52	50	45
Tax fees
Other services	1	1	1
Audit-related fees
Disclosure of products and services [line items]
Other services	10	9	9
Audit-related fees | KPMG
Disclosure of products and services [line items]
Audit fees	£ 6	£ 5	£ 5

Interest rate benchmark refor_2

Interest rate benchmark reform - Significant exposures impacted by the IBOR reform (Details) - GBP (£) £ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of financial instruments by type of interest rate [line items]
Loans and advances at amortised cost	£ 342,632	£ 339,115
Reverse repurchase agreements and other similar secured lending	9,031	3,379
Financial assets at fair value through the income statement	175,151	133,086
Financial assets at fair value through other comprehensive income	78,688	65,750
Non-derivative financial assets	1,329,242	1,119,650
Debt securities in issue	(75,796)	(76,369)
Subordinated liabilities	(16,341)	(18,156)	£ (20,559)
Financial liabilities designated at fair value	(249,765)	(204,326)
Non-derivative finanial liabilities	(1,275,684)	£ (1,067,635)
IBOR reform [member]
Disclosure of financial instruments by type of interest rate [line items]
Loans and advances at amortised cost	50,204
Reverse repurchase agreements and other similar secured lending	334
Financial assets at fair value through the income statement	10,361
Financial assets at fair value through other comprehensive income	308
Non-derivative financial assets	61,207
Debt securities in issue	(12,942)
Subordinated liabilities	(1,663)
Financial liabilities designated at fair value	(2,320)
Non-derivative finanial liabilities	(16,925)
Standby facilities, credit lines and other commitments	108,980
IBOR reform [member] | GBP
Disclosure of financial instruments by type of interest rate [line items]
Loans and advances at amortised cost	30,179
Reverse repurchase agreements and other similar secured lending	0
Financial assets at fair value through the income statement	3,496
Financial assets at fair value through other comprehensive income	186
Non-derivative financial assets	33,861
Debt securities in issue	(1,023)
Subordinated liabilities	(71)
Financial liabilities designated at fair value	(149)
Non-derivative finanial liabilities	(1,243)
Standby facilities, credit lines and other commitments	18,944
IBOR reform [member] | USD
Disclosure of financial instruments by type of interest rate [line items]
Loans and advances at amortised cost	18,109
Reverse repurchase agreements and other similar secured lending	334
Financial assets at fair value through the income statement	6,373
Financial assets at fair value through other comprehensive income	114
Non-derivative financial assets	24,930
Debt securities in issue	(10,718)
Subordinated liabilities	(1,592)
Financial liabilities designated at fair value	(1,273)
Non-derivative finanial liabilities	(13,583)
Standby facilities, credit lines and other commitments	74,011
IBOR reform [member] | JPY
Disclosure of financial instruments by type of interest rate [line items]
Loans and advances at amortised cost	173
Reverse repurchase agreements and other similar secured lending	0
Financial assets at fair value through the income statement	0
Financial assets at fair value through other comprehensive income	0
Non-derivative financial assets	173
Debt securities in issue	(1,201)
Subordinated liabilities	0
Financial liabilities designated at fair value	(759)
Non-derivative finanial liabilities	(1,960)
Standby facilities, credit lines and other commitments	0
IBOR reform [member] | CHF
Disclosure of financial instruments by type of interest rate [line items]
Loans and advances at amortised cost	18
Reverse repurchase agreements and other similar secured lending	0
Financial assets at fair value through the income statement	283
Financial assets at fair value through other comprehensive income	0
Non-derivative financial assets	301
Debt securities in issue	0
Subordinated liabilities	0
Financial liabilities designated at fair value	0
Non-derivative finanial liabilities	0
Standby facilities, credit lines and other commitments	74
IBOR reform [member] | Other [member]
Disclosure of financial instruments by type of interest rate [line items]
Loans and advances at amortised cost	1,725
Reverse repurchase agreements and other similar secured lending	0
Financial assets at fair value through the income statement	209
Financial assets at fair value through other comprehensive income	8
Non-derivative financial assets	1,942
Debt securities in issue	0
Subordinated liabilities	0
Financial liabilities designated at fair value	(139)
Non-derivative finanial liabilities	(139)
Standby facilities, credit lines and other commitments	£ 15,951

Interest rate benchmark refor_3

Interest rate benchmark reform - Significant exposures impacted by the interest rate benchmark reform - Derivative notional contract amount (Details) - IBOR reform [member] £ in Millions	Dec. 31, 2020GBP (£)
Disclosure of financial instruments by type of interest rate [line items]
Derivative notional contract amount	£ 12,850,082
GBP
Disclosure of financial instruments by type of interest rate [line items]
Derivative notional contract amount	2,734,692
USD
Disclosure of financial instruments by type of interest rate [line items]
Derivative notional contract amount	6,654,816
EUR
Disclosure of financial instruments by type of interest rate [line items]
Derivative notional contract amount	1,096,590
JPY
Disclosure of financial instruments by type of interest rate [line items]
Derivative notional contract amount	1,940,722
CHF
Disclosure of financial instruments by type of interest rate [line items]
Derivative notional contract amount	179,305
Other [member]
Disclosure of financial instruments by type of interest rate [line items]
Derivative notional contract amount	243,957
OTC derivatives | Interest rate derivatives [member]
Disclosure of financial instruments by type of interest rate [line items]
Derivative notional contract amount	4,705,142
OTC derivatives | Interest rate derivatives [member] | GBP
Disclosure of financial instruments by type of interest rate [line items]
Derivative notional contract amount	592,827
OTC derivatives | Interest rate derivatives [member] | USD
Disclosure of financial instruments by type of interest rate [line items]
Derivative notional contract amount	2,832,802
OTC derivatives | Interest rate derivatives [member] | EUR
Disclosure of financial instruments by type of interest rate [line items]
Derivative notional contract amount	457,844
OTC derivatives | Interest rate derivatives [member] | JPY
Disclosure of financial instruments by type of interest rate [line items]
Derivative notional contract amount	754,206
OTC derivatives | Interest rate derivatives [member] | CHF
Disclosure of financial instruments by type of interest rate [line items]
Derivative notional contract amount	25,681
OTC derivatives | Interest rate derivatives [member] | Other [member]
Disclosure of financial instruments by type of interest rate [line items]
Derivative notional contract amount	41,782
OTC derivatives | Foreign exchange derivatives [member]
Disclosure of financial instruments by type of interest rate [line items]
Derivative notional contract amount	870,905
OTC derivatives | Foreign exchange derivatives [member] | GBP
Disclosure of financial instruments by type of interest rate [line items]
Derivative notional contract amount	155,285
OTC derivatives | Foreign exchange derivatives [member] | USD
Disclosure of financial instruments by type of interest rate [line items]
Derivative notional contract amount	589,334
OTC derivatives | Foreign exchange derivatives [member] | EUR
Disclosure of financial instruments by type of interest rate [line items]
Derivative notional contract amount	0
OTC derivatives | Foreign exchange derivatives [member] | JPY
Disclosure of financial instruments by type of interest rate [line items]
Derivative notional contract amount	93,108
OTC derivatives | Foreign exchange derivatives [member] | CHF
Disclosure of financial instruments by type of interest rate [line items]
Derivative notional contract amount	31,257
OTC derivatives | Foreign exchange derivatives [member] | Other [member]
Disclosure of financial instruments by type of interest rate [line items]
Derivative notional contract amount	1,921
OTC derivatives | Equity and stock index derivatives [member]
Disclosure of financial instruments by type of interest rate [line items]
Derivative notional contract amount	14,896
OTC derivatives | Equity and stock index derivatives [member] | GBP
Disclosure of financial instruments by type of interest rate [line items]
Derivative notional contract amount	1,845
OTC derivatives | Equity and stock index derivatives [member] | USD
Disclosure of financial instruments by type of interest rate [line items]
Derivative notional contract amount	7,946
OTC derivatives | Equity and stock index derivatives [member] | EUR
Disclosure of financial instruments by type of interest rate [line items]
Derivative notional contract amount	544
OTC derivatives | Equity and stock index derivatives [member] | JPY
Disclosure of financial instruments by type of interest rate [line items]
Derivative notional contract amount	1,929
OTC derivatives | Equity and stock index derivatives [member] | CHF
Disclosure of financial instruments by type of interest rate [line items]
Derivative notional contract amount	491
OTC derivatives | Equity and stock index derivatives [member] | Other [member]
Disclosure of financial instruments by type of interest rate [line items]
Derivative notional contract amount	2,141
Cleared by central counterparty | Interest rate derivatives [member]
Disclosure of financial instruments by type of interest rate [line items]
Derivative notional contract amount	6,622,758
Cleared by central counterparty | Interest rate derivatives [member] | GBP
Disclosure of financial instruments by type of interest rate [line items]
Derivative notional contract amount	1,684,553
Cleared by central counterparty | Interest rate derivatives [member] | USD
Disclosure of financial instruments by type of interest rate [line items]
Derivative notional contract amount	2,891,029
Cleared by central counterparty | Interest rate derivatives [member] | EUR
Disclosure of financial instruments by type of interest rate [line items]
Derivative notional contract amount	638,202
Cleared by central counterparty | Interest rate derivatives [member] | JPY
Disclosure of financial instruments by type of interest rate [line items]
Derivative notional contract amount	1,091,479
Cleared by central counterparty | Interest rate derivatives [member] | CHF
Disclosure of financial instruments by type of interest rate [line items]
Derivative notional contract amount	119,382
Cleared by central counterparty | Interest rate derivatives [member] | Other [member]
Disclosure of financial instruments by type of interest rate [line items]
Derivative notional contract amount	198,113
Exchange traded derivatives | Interest rate derivatives [member]
Disclosure of financial instruments by type of interest rate [line items]
Derivative notional contract amount	636,381
Exchange traded derivatives | Interest rate derivatives [member] | GBP
Disclosure of financial instruments by type of interest rate [line items]
Derivative notional contract amount	300,182
Exchange traded derivatives | Interest rate derivatives [member] | USD
Disclosure of financial instruments by type of interest rate [line items]
Derivative notional contract amount	333,705
Exchange traded derivatives | Interest rate derivatives [member] | EUR
Disclosure of financial instruments by type of interest rate [line items]
Derivative notional contract amount	0
Exchange traded derivatives | Interest rate derivatives [member] | JPY
Disclosure of financial instruments by type of interest rate [line items]
Derivative notional contract amount	0
Exchange traded derivatives | Interest rate derivatives [member] | CHF
Disclosure of financial instruments by type of interest rate [line items]
Derivative notional contract amount	2,494
Exchange traded derivatives | Interest rate derivatives [member] | Other [member]
Disclosure of financial instruments by type of interest rate [line items]
Derivative notional contract amount	£ 0

Interest rate benchmark refor_4

Interest rate benchmark reform - Detail on the contractual maturity of the above exposures (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Disclosure of financial instruments by type of interest rate [line items]
Non-derivative financial assets	£ 1,329,242	£ 1,119,650
Non-derivative finanial liabilities	(1,275,684)	(1,067,635)
Equity	(66,882)	(65,660)	£ (63,779)	£ (63,866)
One to two years [member]
Disclosure of financial instruments by type of interest rate [line items]
Non-derivative financial assets	36,843	31,230
Non-derivative finanial liabilities	(21,047)	(35,435)
Equity	185,344	173,274
Later than five years and not later than ten years [member]
Disclosure of financial instruments by type of interest rate [line items]
Non-derivative financial assets	74,826	64,278
Non-derivative finanial liabilities	(29,376)	(28,432)
Equity	105,873	100,828
Greater than ten years [member]
Disclosure of financial instruments by type of interest rate [line items]
Non-derivative financial assets	180,428	174,588
Non-derivative finanial liabilities	(20,997)	(21,745)
Equity	(53,558)	£ (52,015)
IBOR reform [member]
Disclosure of financial instruments by type of interest rate [line items]
Non-derivative financial assets	61,207
Non-derivative finanial liabilities	(16,925)
Equity	(6,631)
Derivative notional contract amount	12,850,082
Standby facilities, credit lines and other commitments	108,980
IBOR reform [member] | One to two years [member]
Disclosure of financial instruments by type of interest rate [line items]
Non-derivative financial assets	14,124
Non-derivative finanial liabilities	(7,885)
Equity	0
Derivative notional contract amount	3,734,327
Standby facilities, credit lines and other commitments	23,399
IBOR reform [member] | Over two years but not more than five years [member]
Disclosure of financial instruments by type of interest rate [line items]
Non-derivative financial assets	26,893
Non-derivative finanial liabilities	(3,889)
Equity	0
Derivative notional contract amount	4,514,594
Standby facilities, credit lines and other commitments	80,560
IBOR reform [member] | Later than five years and not later than ten years [member]
Disclosure of financial instruments by type of interest rate [line items]
Non-derivative financial assets	4,274
Non-derivative finanial liabilities	(4,415)
Equity	0
Derivative notional contract amount	2,904,089
Standby facilities, credit lines and other commitments	2,102
IBOR reform [member] | Greater than ten years [member]
Disclosure of financial instruments by type of interest rate [line items]
Non-derivative financial assets	15,916
Non-derivative finanial liabilities	(736)
Equity	(6,631)
Derivative notional contract amount	1,697,072
Standby facilities, credit lines and other commitments	£ 2,919
GBP | IBOR reform [member]
Disclosure of financial instruments by type of interest rate [line items]
Current Benchmark rate	GBP London Interbank Offered rate (LIBOR)
Non-derivative financial assets	£ 33,861
Non-derivative finanial liabilities	(1,243)
Equity	(3,500)
Derivative notional contract amount	2,734,692
Standby facilities, credit lines and other commitments	18,944
GBP | IBOR reform [member] | One to two years [member]
Disclosure of financial instruments by type of interest rate [line items]
Non-derivative financial assets	4,771
Non-derivative finanial liabilities	(1,055)
Equity	0
Derivative notional contract amount	890,497
Standby facilities, credit lines and other commitments	5,134
GBP | IBOR reform [member] | Over two years but not more than five years [member]
Disclosure of financial instruments by type of interest rate [line items]
Non-derivative financial assets	11,309
Non-derivative finanial liabilities	(116)
Equity	0
Derivative notional contract amount	767,769
Standby facilities, credit lines and other commitments	12,016
GBP | IBOR reform [member] | Later than five years and not later than ten years [member]
Disclosure of financial instruments by type of interest rate [line items]
Non-derivative financial assets	2,409
Non-derivative finanial liabilities	0
Equity	0
Derivative notional contract amount	491,063
Standby facilities, credit lines and other commitments	505
GBP | IBOR reform [member] | Greater than ten years [member]
Disclosure of financial instruments by type of interest rate [line items]
Non-derivative financial assets	15,372
Non-derivative finanial liabilities	(72)
Equity	(3,500)
Derivative notional contract amount	585,363
Standby facilities, credit lines and other commitments	£ 1,289
USD | IBOR reform [member]
Disclosure of financial instruments by type of interest rate [line items]
Current Benchmark rate	USD LIBOR
Non-derivative financial assets	£ 24,930
Non-derivative finanial liabilities	(13,583)
Equity	(3,131)
Derivative notional contract amount	6,654,816
Standby facilities, credit lines and other commitments	74,011
USD | IBOR reform [member] | One to two years [member]
Disclosure of financial instruments by type of interest rate [line items]
Non-derivative financial assets	8,389
Non-derivative finanial liabilities	(5,529)
Equity	0
Derivative notional contract amount	2,020,529
Standby facilities, credit lines and other commitments	15,368
USD | IBOR reform [member] | Over two years but not more than five years [member]
Disclosure of financial instruments by type of interest rate [line items]
Non-derivative financial assets	14,654
Non-derivative finanial liabilities	(3,623)
Equity	0
Derivative notional contract amount	2,572,716
Standby facilities, credit lines and other commitments	56,300
USD | IBOR reform [member] | Later than five years and not later than ten years [member]
Disclosure of financial instruments by type of interest rate [line items]
Non-derivative financial assets	1,715
Non-derivative finanial liabilities	(4,174)
Equity	0
Derivative notional contract amount	1,350,762
Standby facilities, credit lines and other commitments	735
USD | IBOR reform [member] | Greater than ten years [member]
Disclosure of financial instruments by type of interest rate [line items]
Non-derivative financial assets	172
Non-derivative finanial liabilities	(257)
Equity	(3,131)
Derivative notional contract amount	710,809
Standby facilities, credit lines and other commitments	£ 1,608
EUR | IBOR reform [member]
Disclosure of financial instruments by type of interest rate [line items]
Current Benchmark rate	Euro Overnight Index Average (EONIA)
Derivative notional contract amount	£ 1,096,590
EUR | IBOR reform [member] | One to two years [member]
Disclosure of financial instruments by type of interest rate [line items]
Derivative notional contract amount	397,989
EUR | IBOR reform [member] | Over two years but not more than five years [member]
Disclosure of financial instruments by type of interest rate [line items]
Derivative notional contract amount	421,460
EUR | IBOR reform [member] | Later than five years and not later than ten years [member]
Disclosure of financial instruments by type of interest rate [line items]
Derivative notional contract amount	212,185
EUR | IBOR reform [member] | Greater than ten years [member]
Disclosure of financial instruments by type of interest rate [line items]
Derivative notional contract amount	£ 64,956
JPY | IBOR reform [member]
Disclosure of financial instruments by type of interest rate [line items]
Current Benchmark rate	JPY LIBOR
Non-derivative financial assets	£ 173
Non-derivative finanial liabilities	(1,960)
Derivative notional contract amount	1,940,722
Standby facilities, credit lines and other commitments	0
JPY | IBOR reform [member] | One to two years [member]
Disclosure of financial instruments by type of interest rate [line items]
Non-derivative financial assets	11
Non-derivative finanial liabilities	(1,289)
Derivative notional contract amount	327,669
JPY | IBOR reform [member] | Over two years but not more than five years [member]
Disclosure of financial instruments by type of interest rate [line items]
Non-derivative financial assets	144
Non-derivative finanial liabilities	(145)
Derivative notional contract amount	582,200
JPY | IBOR reform [member] | Later than five years and not later than ten years [member]
Disclosure of financial instruments by type of interest rate [line items]
Non-derivative financial assets	0
Non-derivative finanial liabilities	(241)
Derivative notional contract amount	731,942
JPY | IBOR reform [member] | Greater than ten years [member]
Disclosure of financial instruments by type of interest rate [line items]
Non-derivative financial assets	18
Non-derivative finanial liabilities	(285)
Derivative notional contract amount	£ 298,911
CHF | IBOR reform [member]
Disclosure of financial instruments by type of interest rate [line items]
Current Benchmark rate	CHF LIBOR
Non-derivative financial assets	£ 301
Non-derivative finanial liabilities	0
Derivative notional contract amount	179,305
Standby facilities, credit lines and other commitments	74
CHF | IBOR reform [member] | One to two years [member]
Disclosure of financial instruments by type of interest rate [line items]
Non-derivative financial assets	22
Non-derivative finanial liabilities	0
Derivative notional contract amount	46,868
Standby facilities, credit lines and other commitments	0
CHF | IBOR reform [member] | Over two years but not more than five years [member]
Disclosure of financial instruments by type of interest rate [line items]
Non-derivative financial assets	73
Non-derivative finanial liabilities	0
Derivative notional contract amount	73,792
Standby facilities, credit lines and other commitments	74
CHF | IBOR reform [member] | Later than five years and not later than ten years [member]
Disclosure of financial instruments by type of interest rate [line items]
Non-derivative financial assets	90
Non-derivative finanial liabilities	0
Derivative notional contract amount	46,010
Standby facilities, credit lines and other commitments	0
CHF | IBOR reform [member] | Greater than ten years [member]
Disclosure of financial instruments by type of interest rate [line items]
Non-derivative financial assets	116
Non-derivative finanial liabilities	0
Derivative notional contract amount	12,635
Standby facilities, credit lines and other commitments	£ 0
Other [member] | IBOR reform [member]
Disclosure of financial instruments by type of interest rate [line items]
Current Benchmark rate	All Other IBORs
Non-derivative financial assets	£ 1,942
Non-derivative finanial liabilities	(139)
Derivative notional contract amount	243,957
Standby facilities, credit lines and other commitments	15,951
Other [member] | IBOR reform [member] | One to two years [member]
Disclosure of financial instruments by type of interest rate [line items]
Non-derivative financial assets	931
Non-derivative finanial liabilities	(12)
Derivative notional contract amount	50,775
Standby facilities, credit lines and other commitments	2,897
Other [member] | IBOR reform [member] | Over two years but not more than five years [member]
Disclosure of financial instruments by type of interest rate [line items]
Non-derivative financial assets	713
Non-derivative finanial liabilities	(5)
Derivative notional contract amount	96,657
Standby facilities, credit lines and other commitments	12,170
Other [member] | IBOR reform [member] | Later than five years and not later than ten years [member]
Disclosure of financial instruments by type of interest rate [line items]
Non-derivative financial assets	60
Non-derivative finanial liabilities	0
Derivative notional contract amount	72,127
Standby facilities, credit lines and other commitments	862
Other [member] | IBOR reform [member] | Greater than ten years [member]
Disclosure of financial instruments by type of interest rate [line items]
Non-derivative financial assets	238
Non-derivative finanial liabilities	(122)
Derivative notional contract amount	24,398
Standby facilities, credit lines and other commitments	£ 22

Interest rate benchmark refor_5

Interest rate benchmark reform (Narrative) (Details) £ in Millions	12 Months Ended
	Dec. 31, 2020GBP (£)
Disclosure of financial instruments by type of interest rate [line items]
Description of how entity is managing process to transition to alternative benchmark rates for hedging relationships	How the Group is managing the transition to alternative benchmark rates Barclays has established a Group-wide LIBOR Transition Programme, with oversight from the Group Finance Director. The Programme spans all business lines and has cross-functional governance which includes Legal, Conduct Risk, Client Engagement and Communications, Risk, and Finance. The Transition Programme aims to drive strategic execution, and identify, manage and resolve key risks and issues as they arise. Accountable Executives are in place within key working groups across businesses and workstreams. Barclays’ transition plans primarily focus on G5 currencies while providing quarterly updates on progress and exposures to the PRA/FCA and other regulators as required. The Transition Programme follows a risk based approach, using recognised ‘change delivery’ control standards, to drive strategic execution, and identify, manage and resolve key risks and issues as they arise. Accountable Executives are in place within key working groups, with overall Board oversight delegated to the Board Risk Committee and the Group Finance Director. Barclays performs a prominent stewardship role to drive orderly transition via our representation on official sector and industry working groups across all major jurisdictions and product classes. Additionally, the Group Finance Director is Chair of the UK’s ‘Working Group on Sterling Risk-Free Reference Rates’, whose mandate is to catalyse a broad-based transition to using SONIA (‘Sterling Overnight Index Average’) as the primary sterling interest rate benchmark in bond, loan and derivatives markets. Approaches to transition exposure expiring post the expected end dates for LIBOR vary by product and nature of counterparty. The Group is actively engaging with the counterparties to transition or include appropriate fallback provisions and transition mechanisms in its floating rate assets and liabilities with maturities after 2021, when most IBORs are expected to cease to be published. For the derivative population, adherence to the ISDA IBOR Fallbacks Protocol now provides Barclays with an efficient mechanism to amend outstanding trades to incorporate fallbacks. Beyond the ISDA IBOR Fallbacks Protocol, there will be options to terminate or bilaterally agree new terms with counterparties. Barclays expects derivative contracts facing central clearing counterparties to follow a market-wide, standardised approach to reform. Market participants are currently awaiting publication of the results of ICE Benchmark Administration’s consultation on plans to cease publication of most LIBORs at end 2021, with certain, actively used USD LIBOR tenors continuing to be provided until end June 2023. The FCA expects to enable publication of a synthetic LIBOR rate for at least certain actively used GBP LIBOR tenors to facilitate roll-off of relevant contracts that cannot be actively transitioned by end 2021. Progress made during 2020 During 2020, the Group has successfully delivered Alternative RFR product capabilities and alternatives to LIBOR across loans, bonds and derivatives. Good progress has been made in relation to client outreach and we have been actively engaging with customers and counterparties to transition or include the appropriate fallback provisions. The Group has in place detailed plans, processes and procedures to support the transition of the remainder during 2021. Barclays has adhered to the ISDA IBOR Fallbacks Protocol for its major derivative dealing entities and we continue to track progress and engage with clients on their own adherence. Following the progress made during 2020, the Group continues to deliver technology and business process changes to ensure operational readiness in preparation for LIBOR cessation and transitions to RFRs that will be necessary during 2021 in line with official sector expectations and milestones. Risks to which the Group is exposed as a result of the transition IBOR reform exposes the Group to various risks, which are being managed through the LIBOR Transition Programme. The material risks identified include those set out below: Conduct and Litigation Risk: This is the risk that poor customer outcomes are brought about as a direct result of inappropriate or negligent conduct on the part of Barclays, in connection with IBOR transition. Operational Risk: The LIBOR Transition Programme cuts across all businesses and functions. There are a number of implementation challenges arising from transition, including technology, operations, client communication and the measurement of valuation, giving rise to additional operational risks. Market Risk: Changes to Barclays Market Risk profile are expected due to IBOR transition. These changes are expected to be managed within risk appetite. IBOR transition will also impact the basis risk profile both at the cessation event (when broadly all LIBOR contracts fall back to alternatives) as well as in the interim period when alternative rates are referenced in contracts. Counterparty Credit Risk: LIBOR replacement presents an increased risk of clients wishing to renegotiate the terms of existing transactions. This is dependent on client behaviour and the outcome of resulting negotiations and could change the credit risk profile of client exposure. Financial Risk: There is a risk to Barclays and its clients that markets are disrupted due to IBOR reform. This could give rise to financial losses should Barclays be unable to operate effectively in financial markets. Accounting Risk: This would occur if the hedged items and hedging instruments of Barclays hedging relationships were to transition away from IBORs: at different times; to different benchmarks; or using divergent methodologies resulting in significant volatility to the income statement either through hedge accounting ineffectiveness or failure of the hedge accounting relationships. A disorderly cessation of LIBOR would carry substantial economic, legal, regulatory, reputational and operational risks for Barclays and the industry in general. Barclays’ expectation is that the transition away from LIBOR will be carefully managed and that measures including the broad adoption of ISDA IBOR Fallbacks Protocol, the approach the Central Clearing Counterparties are expected to follow, proactive client engagement, regulatory action and/or terminating or bilaterally amending contracts where clients do not wish to adopt new conventions (e.g. ISDA IBOR Fallbacks Protocol), can mitigate the risks associated with a disorderly cessation. The Group does not expect material changes to its risk management approach and strategy as a result of interest rate benchmark reform.
IBOR reform [member]
Disclosure of financial instruments by type of interest rate [line items]
Notional amount	£ 12,850,082
IBOR reform [member] | Provision for retained issuance
Disclosure of financial instruments by type of interest rate [line items]
Retained debt issuance	28,000
IBOR reform [member] | Cross currency swaps
Disclosure of financial instruments by type of interest rate [line items]
Notional amount	£ 264,000

Barclays PLC (the Parent comp_2

Barclays PLC (the Parent company) - Total income (Narrative) (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of transactions between related parties [line items]
Dividend received from subsidiaries	£ 37	£ 76	£ 91
Other income	31	99	114
Barclays PLC [member]
Disclosure of transactions between related parties [line items]
Dividend received from subsidiaries	763	1,560	15,360
Other income	1,192	1,760	923
Barclays PLC [member] | AT1 Securities [member]
Disclosure of transactions between related parties [line items]
Other income	857	813	£ 752
Barclays PLC [member] | Subsidiaries [member]
Disclosure of transactions between related parties [line items]
Fair value and foreign exchange losses on other positions with subsidiaries	(248)	£ (947)
Barclays PLC [member] | Barclays Bank PLC [member]
Disclosure of transactions between related parties [line items]
Dividend received from subsidiaries	263
Barclays PLC [member] | Barclays Execution Services Limited [member]
Disclosure of transactions between related parties [line items]
Dividend received from subsidiaries	250
Barclays PLC [member] | Barclays Bank UK PLC [member]
Disclosure of transactions between related parties [line items]
Dividend received from subsidiaries	£ 220

Barclays PLC (the Parent comp_3

Barclays PLC (the Parent company) - Total assets and liabilities (Narrative) (Details) € in Millions, £ in Millions, $ in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2020EUR (€)	Dec. 31, 2020GBP (£)	Dec. 31, 2020USD ($)	Dec. 31, 2019GBP (£)		Dec. 31, 2018GBP (£)		Dec. 31, 2020AUD ($)	Dec. 31, 2020GBP (£)
Investment in subsidiaries
Impairment charges		£ (5,084)		£ (2,028)		£ (1,660)
Impairment in subsidiaries
Impairment of subsidiary		4,838		£ 1,912	[1]	1,468	[1]
Explanation of period over which management has projected cash flows				5-year
Yield used to discount cash flows that do not vary based on returns on underlying items								0.15%	0.15%
Impairment charge		194		£ 33		9
Loans and advances in subsidiaries
Loans and advances to subsidiaries				339,115					£ 342,632
Financial assets and liabilities designated at fair value
Financial liabilities designated at fair value				204,326					249,765
Financial assets at fair value through the income statement				133,086					175,151
Subordinated liabilities and debt securities in issue
Issuance of subordinated debt		1,438		1,352	[1]	221	[1]
Subordinated liabilities				18,156		20,559			16,341
Redemption of subordinated liabilities		£ 3,258		3,248	[1]	3,246	[1]
Debt securities in issue				76,369					75,796
Cashflows
Impairment in subsidiaries
Description of key assumptions on which management has based determination of fair value less costs of disposal	Cash flows: The medium term plans used to determine the cash flows used in the VIU calculation rely on macroeconomic forecasts, including interest rates, GDP and unemployment, and forecast levels of market and client activity. Interest rate assumptions impact planned cash flows from both customer income and structural hedge contributions and therefore cash flow expectations are highly sensitive to movements in the yield curve. The cash flows also contain assumptions with regards to the prudential and financial conduct regulatory environment which may be subject to change. Given the current level of economic uncertainty, a 10% reduction in cash flows has been provided to show the sensitivity of the outcome to a change in these key assumptions.	Cash flows: The medium term plans used to determine the cash flows used in the VIU calculation rely on macroeconomic forecasts, including interest rates, GDP and unemployment, and forecast levels of market and client activity. Interest rate assumptions impact planned cash flows from both customer income and structural hedge contributions and therefore cash flow expectations are highly sensitive to movements in the yield curve. The cash flows also contain assumptions with regards to the prudential and financial conduct regulatory environment which may be subject to change. Given the current level of economic uncertainty, a 10% reduction in cash flows has been provided to show the sensitivity of the outcome to a change in these key assumptions.	Cash flows: The medium term plans used to determine the cash flows used in the VIU calculation rely on macroeconomic forecasts, including interest rates, GDP and unemployment, and forecast levels of market and client activity. Interest rate assumptions impact planned cash flows from both customer income and structural hedge contributions and therefore cash flow expectations are highly sensitive to movements in the yield curve. The cash flows also contain assumptions with regards to the prudential and financial conduct regulatory environment which may be subject to change. Given the current level of economic uncertainty, a 10% reduction in cash flows has been provided to show the sensitivity of the outcome to a change in these key assumptions.
Discount rate
Impairment in subsidiaries
Description of key assumptions on which management has based determination of fair value less costs of disposal	Discount rate: The discount rate should reflect the market risk free rate adjusted for the inherent risks of the business it is applied to. Management have identified discount rates for comparable businesses and consider these to be a reasonable estimate of a suitable market rate for the profile of the business unit being tested. The risk that these discount rates may not be appropriate is quantified below and show the impact of a 100 bps change in the discount rate.	Discount rate: The discount rate should reflect the market risk free rate adjusted for the inherent risks of the business it is applied to. Management have identified discount rates for comparable businesses and consider these to be a reasonable estimate of a suitable market rate for the profile of the business unit being tested. The risk that these discount rates may not be appropriate is quantified below and show the impact of a 100 bps change in the discount rate.	Discount rate: The discount rate should reflect the market risk free rate adjusted for the inherent risks of the business it is applied to. Management have identified discount rates for comparable businesses and consider these to be a reasonable estimate of a suitable market rate for the profile of the business unit being tested. The risk that these discount rates may not be appropriate is quantified below and show the impact of a 100 bps change in the discount rate.
Terminal growth rate
Impairment in subsidiaries
Description of key assumptions on which management has based determination of fair value less costs of disposal	Terminal growth rate: The terminal growth rate is used to estimate the cash flows into perpetuity based on the expected longevity of the CGU’s businesses. The terminal growth rate is sensitive to uncertainties in the macroeconomic environment. The risk that using inflation data may not be appropriate for its determination is quantified below and shows the impact of 100 bps change in the terminal value.	Terminal growth rate: The terminal growth rate is used to estimate the cash flows into perpetuity based on the expected longevity of the CGU’s businesses. The terminal growth rate is sensitive to uncertainties in the macroeconomic environment. The risk that using inflation data may not be appropriate for its determination is quantified below and shows the impact of 100 bps change in the terminal value.	Terminal growth rate: The terminal growth rate is used to estimate the cash flows into perpetuity based on the expected longevity of the CGU’s businesses. The terminal growth rate is sensitive to uncertainties in the macroeconomic environment. The risk that using inflation data may not be appropriate for its determination is quantified below and shows the impact of 100 bps change in the terminal value.
Callable [member]
Loans and advances in subsidiaries
Loans and advances to subsidiaries				14,824					14,098
Financial assets and liabilities designated at fair value
Financial liabilities designated at fair value				13,952					15,555
Financial assets at fair value through the income statement				14,279					17,377
Subordinated liabilities and debt securities in issue
Subordinated liabilities				0					0
Debt securities in issue				0					0
Other financial assets [member]
Investment in subsidiaries
Impairment charges		£ (153)		(8)
AT1 Securities [member]
Subordinated liabilities and debt securities in issue
Management of internal investments, loans and advances	All AT1 securities will be converted into ordinary shares of Barclays PLC, at a pre-determined price, should the fully loaded CET1 ratio of the Group fall below 7%	All AT1 securities will be converted into ordinary shares of Barclays PLC, at a pre-determined price, should the fully loaded CET1 ratio of the Group fall below 7%	All AT1 securities will be converted into ordinary shares of Barclays PLC, at a pre-determined price, should the fully loaded CET1 ratio of the Group fall below 7%
Barclays PLC [member]
Investment in subsidiaries
Investments in subsidiaries				59,546					58,886
Increase (decrease) through change in equity of subsidiaries, equity		£ 660
Loans and advances in subsidiaries
Loans and advances to subsidiaries				28,850					24,710
Decrease in loans and advances to subsidiaries of the Parent		(4,732)		(4,464)		(7,767)
Financial assets and liabilities designated at fair value
Financial liabilities designated at fair value				3,498					9,507
Issuance of bonds and notes		3,720		2,588		9,174
Financial assets at fair value through the income statement				10,348					17,521
Difference between the financial liabilities' carrying amount and the contractual amount on maturity				174					324
Subordinated liabilities and debt securities in issue
Issuance of subordinated debt		158		1,194		0
Subordinated liabilities				7,656					7,724
Debt securities in issue				30,564					28,428
Issuance of bonds and notes		£ 3,720		2,588		£ 9,174
Management of internal investments, loans and advances	Barclays PLC retains the discretion to manage the nature of its internal investments in subsidiaries according to their regulatory and business needs. Barclays PLC may invest capital and funding into Barclays Bank PLC, Barclays Bank UK PLC and other Group subsidiaries such as Barclays Execution Services Limited and the US Intermediate Holding Company (IHC).	Barclays PLC retains the discretion to manage the nature of its internal investments in subsidiaries according to their regulatory and business needs. Barclays PLC may invest capital and funding into Barclays Bank PLC, Barclays Bank UK PLC and other Group subsidiaries such as Barclays Execution Services Limited and the US Intermediate Holding Company (IHC).	Barclays PLC retains the discretion to manage the nature of its internal investments in subsidiaries according to their regulatory and business needs. Barclays PLC may invest capital and funding into Barclays Bank PLC, Barclays Bank UK PLC and other Group subsidiaries such as Barclays Execution Services Limited and the US Intermediate Holding Company (IHC).
Barclays PLC [member] | Fixed interest rate [member] | Callable [member]
Subordinated liabilities and debt securities in issue
Issuance of subordinated debt		£ 500
Barclays PLC [member] | Subordinated Notes [member] | Fixed interest rate [member] | Callable [member]
Subordinated liabilities and debt securities in issue
Issuance of subordinated debt | $			$ 1,000
Redemption of subordinated liabilities | €	€ 1,250
Barclays PLC [member] | Zero coupon [member] | Callable [member]
Financial assets and liabilities designated at fair value
Issuance of bonds and notes | $			300
Subordinated liabilities and debt securities in issue
Issuance of bonds and notes | $			300
Barclays PLC [member] | Senior Notes [member]
Subordinated liabilities and debt securities in issue
Redemption of subordinated liabilities | $			776
Barclays PLC [member] | Senior Notes [member] | Fixed interest rate [member]
Financial assets and liabilities designated at fair value
Issuance of bonds and notes | €	330
Subordinated liabilities and debt securities in issue
Issuance of bonds and notes | €	330
Barclays PLC [member] | Senior Notes [member] | Fixed interest rate [member] | Callable [member]
Financial assets and liabilities designated at fair value
Issuance of bonds and notes | $			2,500
Subordinated liabilities and debt securities in issue
Issuance of bonds and notes | $			2,500
Barclays PLC [member] | Senior Notes [member] | Fixed and Floating Rate [member]
Financial assets and liabilities designated at fair value
Financial liabilities designated at fair value | $								$ 400
Barclays PLC [member] | Senior Notes [member] | Fixed and Floating Rate [member] | Callable [member]
Financial assets and liabilities designated at fair value
Issuance of bonds and notes | $			1,750
Subordinated liabilities and debt securities in issue
Issuance of bonds and notes | $			1,750
Barclays PLC [member] | Reset Notes [member]
Financial assets and liabilities designated at fair value
Issuance of bonds and notes | €	2,000
Subordinated liabilities and debt securities in issue
Issuance of bonds and notes | €	€ 2,000
Barclays PLC [member] | AT1 Securities [member]
Investment in subsidiaries
Investments in subsidiaries				10,843					10,995
Barclays PLC [member] | Subsidiaries [member]
Loans and advances in subsidiaries
Decrease in loans and advances to subsidiaries of the Parent		4,140
Barclays PLC [member] | Subsidiaries [member] | Subordinated Notes [member]
Loans and advances in subsidiaries
Decrease in loans and advances to subsidiaries of the Parent		(1,100)
Barclays PLC [member] | Subsidiaries [member] | Senior debt [member]
Loans and advances in subsidiaries
Decrease in loans and advances to subsidiaries of the Parent		(900)
Barclays PLC [member] | Barclays Bank PLC [member]
Investment in subsidiaries
Investments in subsidiaries				42,363					44,015
Increase (decrease) through change in equity of subsidiaries, equity		(1,500)
Loans and advances in subsidiaries
Increase (decrease) through conversion of convertible instruments, equity		1,200
Barclays PLC [member] | Barclays Bank PLC [member] | AT1 Securities [member]
Investment in subsidiaries
Increase (decrease) through change in equity of subsidiaries, equity | $			$ (1,500)
Barclays PLC [member] | Barclays Bank UK PLC [member]
Investment in subsidiaries
Investments in subsidiaries				£ 16,595					14,245
Impairment charges		(2,573)
Increase (decrease) through change in equity of subsidiaries, equity		(220)
Impairment in subsidiaries
Impairment of subsidiary		2,573
Value in use									£ 11,672
Discount rate applied to cash flow projections				13.70%				13.80%	13.80%
Terminal growth rate				1.60%				2.00%	2.00%
Loans and advances in subsidiaries
Decrease in loans and advances to subsidiaries of the Parent		£ 220
Barclays PLC [member] | Barclays Bank UK PLC [member] | Personal Banking
Impairment in subsidiaries
Explanation of period over which management has projected cash flows	5-year	5-year	5-year
Yield used to discount cash flows that do not vary based on returns on underlying items								0.15%	0.15%
Barclays PLC [member] | Barclays Bank UK PLC [member] | Cashflows | Personal Banking
Impairment in subsidiaries
Description of key assumptions on which management has based determination of fair value less costs of disposal	A reduction in the forecasted cash flows by 10% per annum would increase impairment by £1,061m.	A reduction in the forecasted cash flows by 10% per annum would increase impairment by £1,061m.	A reduction in the forecasted cash flows by 10% per annum would increase impairment by £1,061m.
Impairment charge		£ 1,061
Barclays PLC [member] | Barclays Bank UK PLC [member] | Discount rate | Personal Banking
Impairment in subsidiaries
Description of key assumptions on which management has based determination of fair value less costs of disposal	A 1% increase in the discount rate or terminal growth rate would increase the impairment amount in Barclays Bank UK by £1,056m and £714m respectively.	A 1% increase in the discount rate or terminal growth rate would increase the impairment amount in Barclays Bank UK by £1,056m and £714m respectively.	A 1% increase in the discount rate or terminal growth rate would increase the impairment amount in Barclays Bank UK by £1,056m and £714m respectively.
Impairment charge		£ 1,056
Barclays PLC [member] | Barclays Bank UK PLC [member] | Terminal growth rate | Personal Banking
Impairment in subsidiaries
Description of key assumptions on which management has based determination of fair value less costs of disposal	A 1% increase in the discount rate or terminal growth rate would increase the impairment amount in Barclays Bank UK by £1,056m and £714m respectively.	A 1% increase in the discount rate or terminal growth rate would increase the impairment amount in Barclays Bank UK by £1,056m and £714m respectively.	A 1% increase in the discount rate or terminal growth rate would increase the impairment amount in Barclays Bank UK by £1,056m and £714m respectively.
Impairment charge		£ 714
Barclays PLC [member] | Barclays Bank UK PLC [member] | Subordinated Notes [member]
Loans and advances in subsidiaries
Decrease in loans and advances to subsidiaries of the Parent		£ 1,300
Barclays PLC [member] | Barclays Bank UK PLC [member] | AT1 Securities [member]
Investment in subsidiaries
Increase (decrease) through change in equity of subsidiaries, equity | €	€ 1,000
[1]	2019 and 2018 comparative figures have been restated to make the cash flow statement more relevant following a review of the disclosure and the accounting policies applied. Amendments have been made to the classification of cash collateral reported within cash and cash equivalents and to the presentation of items within net cash flows from operating and investing activities. Footnotes b and c below quantify the impact of the changes to the respective cash flow categories in prior periods and provide further detail .

Barclays PLC (the Parent comp_4

Barclays PLC (the Parent company) - Total equity (Narrative) (Details) € in Millions, £ in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2020EUR (€)	Dec. 31, 2020GBP (£)	Dec. 31, 2020USD ($)	Dec. 31, 2019GBP (£)	Dec. 31, 2018GBP (£)	Dec. 31, 2017GBP (£)
Disclosure of transactions between related parties [line items]
Equity		£ 66,882		£ 65,660	£ 63,779	£ 63,866
Called up share capital and share premium [member]
Disclosure of transactions between related parties [line items]
Equity		4,637		4,594	4,311	22,045
At1 securities issuance		0		0
At1 securities redemption		0		0
Other equity instruments [member]
Disclosure of transactions between related parties [line items]
Equity		11,172		10,871	9,632	8,941
At1 securities issuance		1,142		3,500
At1 securities redemption		831		2,262
Barclays PLC [member]
Disclosure of transactions between related parties [line items]
Equity		54,872		56,467	54,180	39,216
Barclays PLC [member] | Called up share capital and share premium [member]
Disclosure of transactions between related parties [line items]
Equity		4,637		4,594	4,311	22,045
Barclays PLC [member] | Other equity instruments [member]
Disclosure of transactions between related parties [line items]
Equity		11,169		£ 10,865	£ 9,633	£ 8,943
Barclays PLC [member] | AT1 Securities [member]
Disclosure of transactions between related parties [line items]
At1 securities issuance		1,142	$ 1,500
At1 securities redemption	€ 1,000	£ 831

Other disclosures - Risk Mana_3

Other disclosures - Risk Management and Principal Risks - Maximum exposure and effects of netting, collateral and risk transfer (audited) (Details) - GBP (£)	Dec. 31, 2020	Dec. 31, 2019
Disclosure of detailed information about financial instruments [line items]
Maximum Exposure	£ 449,093,000,000	£ 329,502,000,000
Netting and set-off	(233,080,000,000)	(175,998,000,000)
Exposure to credit risk [member]
Disclosure of detailed information about financial instruments [line items]
Maximum Exposure	1,615,399,000,000	1,414,036,000,000
Netting and set-off	(240,068,000,000)	(183,634,000,000)
Cash collateral	(46,508,000,000)	(36,261,000,000)
Non-cash collateral	(418,161,000,000)	(372,691,000,000)
Risk transfer	(33,839,000,000)	(21,180,000,000)
Net exposure	876,823,000,000	800,270,000,000
On-balance sheet [member] | Exposure to credit risk [member]
Disclosure of detailed information about financial instruments [line items]
Maximum Exposure	1,260,741,000,000	1,055,054,000,000
Netting and set-off	(240,068,000,000)	(183,634,000,000)
Cash collateral	(45,285,000,000)	(35,777,000,000)
Non-cash collateral	(375,312,000,000)	(321,271,000,000)
Risk transfer	(32,037,000,000)	(19,071,000,000)
Net exposure	568,039,000,000	495,301,000,000
Cash and bank balances at central banks [member] | Exposure to credit risk [member]
Disclosure of detailed information about financial instruments [line items]
Maximum Exposure	191,127,000,000	150,258,000,000
Netting and set-off	0	0
Cash collateral	0	0
Non-cash collateral	0	0
Risk transfer	0	0
Net exposure	191,127,000,000	150,258,000,000
Cash collateral and settlement balances [member] | Exposure to credit risk [member]
Disclosure of detailed information about financial instruments [line items]
Maximum Exposure	101,367,000,000	83,256,000,000
Netting and set-off	0	0
Cash collateral	0	0
Non-cash collateral	0	0
Risk transfer	0	0
Net exposure	101,367,000,000	83,256,000,000
Reverse repurchase agreements [member] | Exposure to credit risk [member]
Disclosure of detailed information about financial instruments [line items]
Maximum Exposure	9,031,000,000	3,379,000,000
Netting and set-off	0	0
Cash collateral	0	0
Non-cash collateral	(9,031,000,000)	(3,379,000,000)
Risk transfer	0	0
Net exposure	0	0
Other assets [member] | Exposure to credit risk [member]
Disclosure of detailed information about financial instruments [line items]
Maximum Exposure	850,000,000	1,375,000,000
Netting and set-off	0	0
Cash collateral	0	0
Non-cash collateral	0	0
Risk transfer	0	0
Net exposure	850,000,000	1,375,000,000
Off-balance sheet [member] | Exposure to credit risk [member]
Disclosure of detailed information about financial instruments [line items]
Maximum Exposure	354,658,000,000	358,982,000,000
Netting and set-off	0	0
Cash collateral	(1,223,000,000)	(484,000,000)
Non-cash collateral	(42,849,000,000)	(51,420,000,000)
Risk transfer	(1,802,000,000)	(2,109,000,000)
Net exposure	308,784,000,000	304,969,000,000
Off-balance sheet [member] | Contingent liabilities [member] | Exposure to credit risk [member]
Disclosure of detailed information about financial instruments [line items]
Maximum Exposure	21,609,000,000	24,527,000,000
Netting and set-off	0	0
Cash collateral	(1,095,000,000)	(400,000,000)
Non-cash collateral	(2,135,000,000)	(4,412,000,000)
Risk transfer	(282,000,000)	(159,000,000)
Net exposure	18,097,000,000	19,556,000,000
Financial assets at fair value through the income statement [member] | On-balance sheet [member] | Exposure to credit risk [member]
Disclosure of detailed information about financial instruments [line items]
Maximum Exposure	170,531,000,000	125,591,000,000
Netting and set-off	0	0
Cash collateral	(681,000,000)	(1,146,000,000)
Non-cash collateral	(160,506,000,000)	(112,316,000,000)
Risk transfer	0	(57,000,000)
Net exposure	9,344,000,000	12,072,000,000
Financial assets at fair value through other comprehensive income [member] | Exposure to credit risk [member]
Disclosure of detailed information about financial instruments [line items]
Maximum Exposure		64,727,000,000
Netting and set-off		0
Cash collateral		0
Non-cash collateral		(305,000,000)
Risk transfer		(1,051,000,000)
Net exposure		63,371,000,000
Financial assets at fair value through other comprehensive income [member] | On-balance sheet [member] | Exposure to credit risk [member]
Disclosure of detailed information about financial instruments [line items]
Maximum Exposure	77,927,000,000
Netting and set-off	0
Cash collateral	0
Non-cash collateral	(106,000,000)
Risk transfer	(1,385,000,000)
Net exposure	76,436,000,000
Trading portfolio assets [member] | On-balance sheet [member] | Exposure to credit risk [member]
Disclosure of detailed information about financial instruments [line items]
Maximum Exposure	64,830,000,000	58,117,000,000
Netting and set-off	0	0
Cash collateral	0	0
Non-cash collateral	(765,000,000)	(557,000,000)
Risk transfer	0	0
Net exposure	64,065,000,000	57,560,000,000
Reverse repurchase agreements [member] | Financial assets at fair value through the income statement [member] | On-balance sheet [member] | Exposure to credit risk [member]
Disclosure of detailed information about financial instruments [line items]
Maximum Exposure	137,616,000,000	96,887,000,000
Netting and set-off	0	0
Cash collateral	(672,000,000)	(1,132,000,000)
Non-cash collateral	(136,537,000,000)	(95,736,000,000)
Risk transfer	0	0
Net exposure	407,000,000	19,000,000
Other financial assets [member] | Financial assets at fair value through the income statement [member] | On-balance sheet [member] | Exposure to credit risk [member]
Disclosure of detailed information about financial instruments [line items]
Maximum Exposure	343,000,000	763,000,000
Netting and set-off	0	0
Cash collateral	0	0
Non-cash collateral	0	0
Risk transfer	0	0
Net exposure	343,000,000	763,000,000
Derivative financial instruments [member]
Disclosure of detailed information about financial instruments [line items]
Maximum Exposure	302,446,000,000	229,236,000,000
Netting and set-off	(233,080,000,000)	(175,998,000,000)
Cash collateral	(43,291,000,000)	(33,411,000,000)
Derivative financial instruments [member] | Exposure to credit risk [member]
Disclosure of detailed information about financial instruments [line items]
Maximum Exposure	4,605,000,000	8,215,000,000
Netting and set-off	(3,584,000,000)	(6,589,000,000)
Derivative financial instruments [member] | On-balance sheet [member] | Exposure to credit risk [member]
Disclosure of detailed information about financial instruments [line items]
Maximum Exposure	302,446,000,000	229,236,000,000
Netting and set-off	(233,080,000,000)	(175,998,000,000)
Cash collateral	(43,291,000,000)	(33,411,000,000)
Non-cash collateral	(4,773,000,000)	(5,511,000,000)
Risk transfer	(6,409,000,000)	(5,564,000,000)
Net exposure	14,893,000,000	8,752,000,000
Traded loans [member] | Trading portfolio assets [member] | On-balance sheet [member] | Exposure to credit risk [member]
Disclosure of detailed information about financial instruments [line items]
Maximum Exposure	8,348,000,000	5,378,000,000
Netting and set-off	0	0
Cash collateral	0	0
Non-cash collateral	(374,000,000)	(134,000,000)
Risk transfer	0	0
Net exposure	7,974,000,000	5,244,000,000
Loans and advances [member] | Financial assets at amortised cost [member] | On-balance sheet [member] | Exposure to credit risk [member]
Disclosure of detailed information about financial instruments [line items]
Maximum Exposure	342,632,000,000	339,115,000,000
Netting and set-off	(6,988,000,000)	(7,636,000,000)
Cash collateral	(1,313,000,000)	(1,220,000,000)
Non-cash collateral	(200,131,000,000)	(199,203,000,000)
Risk transfer	(24,243,000,000)	(12,399,000,000)
Net exposure	109,957,000,000	118,657,000,000
Loans and advances [member] | Financial assets at amortised cost [member] | On-balance sheet [member] | Exposure to credit risk [member] | Credit Impaired - Stage 3 [member]
Disclosure of detailed information about financial instruments [line items]
Maximum Exposure	5,259,000,000	4,695,000,000
Netting and set-off	0	0
Cash collateral	(32,000,000)	(23,000,000)
Non-cash collateral	(2,905,000,000)	(2,944,000,000)
Risk transfer	(234,000,000)	(36,000,000)
Net exposure	2,088,000,000	1,692,000,000
Loans and advances [member] | Financial assets at fair value through the income statement [member] | On-balance sheet [member] | Exposure to credit risk [member]
Disclosure of detailed information about financial instruments [line items]
Maximum Exposure	30,879,000,000	22,692,000,000
Netting and set-off	0	0
Cash collateral	(9,000,000)	(14,000,000)
Non-cash collateral	(23,677,000,000)	(16,580,000,000)
Risk transfer	0	(57,000,000)
Net exposure	7,193,000,000	6,041,000,000
Home loans [member] | Financial assets at amortised cost [member] | On-balance sheet [member] | Exposure to credit risk [member]
Disclosure of detailed information about financial instruments [line items]
Maximum Exposure	159,647,000,000	154,479,000,000
Netting and set-off	0	0
Cash collateral	(284,000,000)	(294,000,000)
Non-cash collateral	(159,203,000,000)	(153,939,000,000)
Risk transfer	(85,000,000)	(70,000,000)
Net exposure	75,000,000	176,000,000
Home loans [member] | Financial assets at amortised cost [member] | On-balance sheet [member] | Exposure to credit risk [member] | Credit Impaired - Stage 3 [member]
Disclosure of detailed information about financial instruments [line items]
Maximum Exposure	1,813,000,000	1,809,000,000
Netting and set-off	0	0
Cash collateral	(14,000,000)	(2,000,000)
Non-cash collateral	(1,796,000,000)	(1,785,000,000)
Risk transfer	0	(14,000,000)
Net exposure	3,000,000	8,000,000
Credit cards, unsecured loans and other retail lending [member] | Financial assets at amortised cost [member] | On-balance sheet [member] | Exposure to credit risk [member]
Disclosure of detailed information about financial instruments [line items]
Maximum Exposure	40,813,000,000	55,296,000,000
Netting and set-off	0	0
Cash collateral	(967,000,000)	(778,000,000)
Non-cash collateral	(3,825,000,000)	(5,283,000,000)
Risk transfer	(195,000,000)	(258,000,000)
Net exposure	35,826,000,000	48,977,000,000
Credit cards, unsecured loans and other retail lending [member] | Financial assets at amortised cost [member] | On-balance sheet [member] | Exposure to credit risk [member] | Credit Impaired - Stage 3 [member]
Disclosure of detailed information about financial instruments [line items]
Maximum Exposure	921,000,000	1,074,000,000
Netting and set-off	0	0
Cash collateral	(14,000,000)	(12,000,000)
Non-cash collateral	(237,000,000)	(250,000,000)
Risk transfer	(2,000,000)	(2,000,000)
Net exposure	668,000,000	810,000,000
Wholesale loans [member] | Financial assets at amortised cost [member] | On-balance sheet [member] | Exposure to credit risk [member]
Disclosure of detailed information about financial instruments [line items]
Maximum Exposure	142,172,000,000	129,340,000,000
Netting and set-off	(6,988,000,000)	(7,636,000,000)
Cash collateral	(62,000,000)	(148,000,000)
Non-cash collateral	(37,103,000,000)	(39,981,000,000)
Risk transfer	(23,963,000,000)	(12,071,000,000)
Net exposure	74,056,000,000	69,504,000,000
Wholesale loans [member] | Financial assets at amortised cost [member] | On-balance sheet [member] | Exposure to credit risk [member] | Credit Impaired - Stage 3 [member]
Disclosure of detailed information about financial instruments [line items]
Maximum Exposure	2,525,000,000	1,812,000,000
Netting and set-off	0	0
Cash collateral	(4,000,000)	(9,000,000)
Non-cash collateral	(872,000,000)	(909,000,000)
Risk transfer	(232,000,000)	(20,000,000)
Net exposure	1,417,000,000	874,000,000
Debt securities [member] | Financial assets at fair value through the income statement [member] | On-balance sheet [member] | Exposure to credit risk [member]
Disclosure of detailed information about financial instruments [line items]
Maximum Exposure	1,693,000,000	5,249,000,000
Netting and set-off	0	0
Cash collateral	0	0
Non-cash collateral	(292,000,000)	0
Risk transfer	0	0
Net exposure	1,401,000,000	5,249,000,000
Debt securities [member] | Trading portfolio assets [member] | On-balance sheet [member] | Exposure to credit risk [member]
Disclosure of detailed information about financial instruments [line items]
Maximum Exposure	56,482,000,000	52,739,000,000
Netting and set-off	0	0
Cash collateral	0	0
Non-cash collateral	(391,000,000)	(423,000,000)
Risk transfer	0	0
Net exposure	56,091,000,000	52,316,000,000
Loan commitments [member] | Off-balance sheet [member] | Exposure to credit risk [member]
Disclosure of detailed information about financial instruments [line items]
Maximum Exposure	333,049,000,000	334,455,000,000
Netting and set-off	0	0
Cash collateral	(128,000,000)	(84,000,000)
Non-cash collateral	(40,714,000,000)	(47,008,000,000)
Risk transfer	(1,520,000,000)	(1,950,000,000)
Net exposure	£ 290,687,000,000	£ 285,413,000,000

Other disclosures - Risk Mana_4

Other disclosures - Risk Management and Principal Risks - Loans and advances at amortised cost by stage (audited) (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ (1,329,242)	£ (1,119,650)
Credit impairment charges	£ (4,838)	£ (1,912)	£ (1,468)
Loan loss rate	1.38%	0.55%
ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 9,399	£ 6,630
Head Office [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Credit impairment charges	(91)	(27)	16
Barclays UK [member] | Operating segments [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Credit impairment charges	(1,467)	(712)	(826)
Barclays International [member] | Operating segments [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Credit impairment charges	(3,280)	£ (1,173)	(658)
Loans and advances at amortised cost, including off balance sheet loan commitments and financial guarantee contracts [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Coverage ratio		1.00%
Loans and advances at amortised cost, including off balance sheet loan commitments and financial guarantee contracts [member] | Financial assets at amortised cost [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ (686,728)	£ (680,053)
Coverage ratio	1.40%
Loans and advances at amortised cost, including off balance sheet loan commitments and financial guarantee contracts [member] | Financial assets at amortised cost [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 696,127	686,683
Loans and advances at amortised cost, including off balance sheet loan commitments and financial guarantee contracts [member] | Financial assets at amortised cost [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 9,399	£ 6,630
Loans and advances at amortised cost, including off balance sheet loan commitments and financial guarantee contracts [member] | Stage 1 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Coverage ratio		0.10%
Loans and advances at amortised cost, including off balance sheet loan commitments and financial guarantee contracts [member] | Stage 1 [member] | Financial assets at amortised cost [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Coverage ratio	0.20%
Loans and advances at amortised cost, including off balance sheet loan commitments and financial guarantee contracts [member] | Stage 1 [member] | Financial assets at amortised cost [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 580,903	£ 620,406
Loans and advances at amortised cost, including off balance sheet loan commitments and financial guarantee contracts [member] | Stage 1 [member] | Financial assets at amortised cost [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 1,289	£ 804
Loans and advances at amortised cost, including off balance sheet loan commitments and financial guarantee contracts [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Coverage ratio		4.40%
Loans and advances at amortised cost, including off balance sheet loan commitments and financial guarantee contracts [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Financial assets at amortised cost [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Coverage ratio	4.20%
Loans and advances at amortised cost, including off balance sheet loan commitments and financial guarantee contracts [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Financial assets at amortised cost [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 103,897	£ 57,419
Loans and advances at amortised cost, including off balance sheet loan commitments and financial guarantee contracts [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Financial assets at amortised cost [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 4,322	£ 2,543
Loans and advances at amortised cost, including off balance sheet loan commitments and financial guarantee contracts [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Coverage ratio		37.10%
Loans and advances at amortised cost, including off balance sheet loan commitments and financial guarantee contracts [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Financial assets at amortised cost [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Coverage ratio	33.40%
Loans and advances at amortised cost, including off balance sheet loan commitments and financial guarantee contracts [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Financial assets at amortised cost [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 11,327	£ 8,858
Loans and advances at amortised cost, including off balance sheet loan commitments and financial guarantee contracts [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Financial assets at amortised cost [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	3,788	3,283
Loans and advances [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Credit impairment charges	(4,685)	(1,904)	(1,465)
Loans and advances [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	(5,000)
Loans and advances [member] | Financial assets at amortised cost [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ (342,632)	£ (339,115)
Coverage ratio	2.40%	1.80%
Credit impairment charges	£ 3,909	£ 1,833
Loan loss rate	1.11%	0.53%
Loans and advances [member] | Financial assets at amortised cost [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 350,967	£ 345,423
Loans and advances [member] | Financial assets at amortised cost [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	8,335	6,308
Loans and advances [member] | Stage 1 [member] | Financial assets at amortised cost [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ (289,931)	£ (298,559)
Coverage ratio	0.40%	0.20%
Loans and advances [member] | Stage 1 [member] | Financial assets at amortised cost [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 290,964	£ 299,266
Loans and advances [member] | Stage 1 [member] | Financial assets at amortised cost [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	1,033	707
Loans and advances [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Financial assets at amortised cost [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ (47,442)	£ (35,861)
Coverage ratio	7.00%	6.20%
Loans and advances [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Financial assets at amortised cost [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 51,006	£ 38,234
Loans and advances [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Financial assets at amortised cost [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	3,564	2,373
Loans and advances [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Financial assets at amortised cost [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ (5,259)	£ (4,695)
Coverage ratio	41.50%	40.70%
Loans and advances [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Financial assets at amortised cost [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 8,997	£ 7,923
Loans and advances [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Financial assets at amortised cost [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	3,738	3,228
Loans and advances [member] | Barclays Group Retail [member] | Financial assets at amortised cost [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ (207,896)	£ (203,377)
Coverage ratio	3.00%	2.50%
Loans and advances [member] | Barclays Group Retail [member] | Financial assets at amortised cost [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 214,249	£ 208,657
Loans and advances [member] | Barclays Group Retail [member] | Financial assets at amortised cost [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 6,353	£ 5,280
Loans and advances [member] | Barclays Group Retail [member] | Stage 1 [member] | Financial assets at amortised cost [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Coverage ratio	0.40%	0.30%
Loans and advances [member] | Barclays Group Retail [member] | Stage 1 [member] | Financial assets at amortised cost [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 178,565	£ 175,786
Loans and advances [member] | Barclays Group Retail [member] | Stage 1 [member] | Financial assets at amortised cost [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 732	£ 555
Loans and advances [member] | Barclays Group Retail [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Financial assets at amortised cost [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Coverage ratio	9.60%	7.50%
Loans and advances [member] | Barclays Group Retail [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Financial assets at amortised cost [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 30,116	£ 27,724
Loans and advances [member] | Barclays Group Retail [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Financial assets at amortised cost [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 2,889	£ 2,087
Loans and advances [member] | Barclays Group Retail [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Financial assets at amortised cost [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Coverage ratio	49.10%	51.30%
Loans and advances [member] | Barclays Group Retail [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Financial assets at amortised cost [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 5,568	£ 5,147
Loans and advances [member] | Barclays Group Retail [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Financial assets at amortised cost [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	2,732	2,638
Loans and advances [member] | Barclays Group Wholesale [member] | Financial assets at amortised cost [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ (134,736)	£ (135,738)
Coverage ratio	1.40%	0.80%
Loans and advances [member] | Barclays Group Wholesale [member] | Financial assets at amortised cost [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 136,718	£ 136,766
Loans and advances [member] | Barclays Group Wholesale [member] | Financial assets at amortised cost [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 1,982	£ 1,028
Loans and advances [member] | Barclays Group Wholesale [member] | Stage 1 [member] | Financial assets at amortised cost [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Coverage ratio	0.30%	0.10%
Loans and advances [member] | Barclays Group Wholesale [member] | Stage 1 [member] | Financial assets at amortised cost [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 112,399	£ 123,480
Loans and advances [member] | Barclays Group Wholesale [member] | Stage 1 [member] | Financial assets at amortised cost [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 301	£ 152
Loans and advances [member] | Barclays Group Wholesale [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Financial assets at amortised cost [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Coverage ratio	3.20%	2.70%
Loans and advances [member] | Barclays Group Wholesale [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Financial assets at amortised cost [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 20,890	£ 10,510
Loans and advances [member] | Barclays Group Wholesale [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Financial assets at amortised cost [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 675	£ 286
Loans and advances [member] | Barclays Group Wholesale [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Financial assets at amortised cost [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Coverage ratio	29.30%	21.30%
Loans and advances [member] | Barclays Group Wholesale [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Financial assets at amortised cost [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 3,429	£ 2,776
Loans and advances [member] | Barclays Group Wholesale [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Financial assets at amortised cost [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	1,006	590
Loans and advances [member] | Operating segments [member] | Barclays Group Retail [member] | Financial assets at amortised cost [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Credit impairment charges	£ 2,841	£ 1,687
Loan loss rate	1.33%	0.81%
Loans and advances [member] | Operating segments [member] | Barclays Group Wholesale [member] | Financial assets at amortised cost [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Credit impairment charges	£ 1,068	£ 146
Loan loss rate	0.78%	0.11%
Loans and advances [member] | Head Office [member] | Barclays Group Retail [member] | Financial assets at amortised cost [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets		£ (5,783)
Coverage ratio		5.60%
Credit impairment charges	£ 91	£ 27
Loan loss rate	1.56%	0.44%
Loans and advances [member] | Head Office [member] | Barclays Group Retail [member] | Financial assets at amortised cost [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 5,831	£ 6,129
Loans and advances [member] | Head Office [member] | Barclays Group Retail [member] | Financial assets at amortised cost [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	435
Loans and advances [member] | Head Office [member] | Barclays Group Retail [member] | Stage 1 [member] | Financial assets at amortised cost [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Coverage ratio		0.10%
Loans and advances [member] | Head Office [member] | Barclays Group Retail [member] | Stage 1 [member] | Financial assets at amortised cost [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	4,267	£ 4,803
Loans and advances [member] | Head Office [member] | Barclays Group Retail [member] | Stage 1 [member] | Financial assets at amortised cost [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	4
Loans and advances [member] | Head Office [member] | Barclays Group Retail [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Financial assets at amortised cost [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Coverage ratio		7.20%
Loans and advances [member] | Head Office [member] | Barclays Group Retail [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Financial assets at amortised cost [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	720	£ 500
Loans and advances [member] | Head Office [member] | Barclays Group Retail [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Financial assets at amortised cost [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	51
Loans and advances [member] | Head Office [member] | Barclays Group Retail [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Financial assets at amortised cost [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Coverage ratio		36.90%
Loans and advances [member] | Head Office [member] | Barclays Group Retail [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Financial assets at amortised cost [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	844	£ 826
Loans and advances [member] | Head Office [member] | Barclays Group Retail [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Financial assets at amortised cost [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	380
Loans and advances [member] | Head Office [member] | Barclays Group Wholesale [member] | Financial assets at amortised cost [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets		£ 2,976
Coverage ratio		1.20%
Credit impairment charges	£ 0	£ 0
Loan loss rate	0.00%	0.00%
Loans and advances [member] | Head Office [member] | Barclays Group Wholesale [member] | Financial assets at amortised cost [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 603
Loans and advances [member] | Head Office [member] | Barclays Group Wholesale [member] | Financial assets at amortised cost [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	31
Loans and advances [member] | Head Office [member] | Barclays Group Wholesale [member] | Stage 1 [member] | Financial assets at amortised cost [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Coverage ratio		0.00%
Loans and advances [member] | Head Office [member] | Barclays Group Wholesale [member] | Stage 1 [member] | Financial assets at amortised cost [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	570
Loans and advances [member] | Head Office [member] | Barclays Group Wholesale [member] | Stage 1 [member] | Financial assets at amortised cost [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	0
Loans and advances [member] | Head Office [member] | Barclays Group Wholesale [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Financial assets at amortised cost [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Coverage ratio		0.00%
Loans and advances [member] | Head Office [member] | Barclays Group Wholesale [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Financial assets at amortised cost [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	0
Loans and advances [member] | Head Office [member] | Barclays Group Wholesale [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Financial assets at amortised cost [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	0
Loans and advances [member] | Head Office [member] | Barclays Group Wholesale [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Financial assets at amortised cost [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Coverage ratio		94.60%
Loans and advances [member] | Head Office [member] | Barclays Group Wholesale [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Financial assets at amortised cost [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	33
Loans and advances [member] | Head Office [member] | Barclays Group Wholesale [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Financial assets at amortised cost [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	31
Loans and advances [member] | Barclays UK [member] | Operating segments [member] | Barclays Group Retail [member] | Financial assets at amortised cost [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ (176,890)	£ (166,292)
Coverage ratio	1.70%	1.50%
Credit impairment charges	£ 1,070	£ 661
Loan loss rate	0.59%	0.39%
Loans and advances [member] | Barclays UK [member] | Operating segments [member] | Barclays Group Retail [member] | Financial assets at amortised cost [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 179,878	£ 168,741
Loans and advances [member] | Barclays UK [member] | Operating segments [member] | Barclays Group Retail [member] | Financial assets at amortised cost [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 2,988	£ 2,449
Loans and advances [member] | Barclays UK [member] | Operating segments [member] | Barclays Group Retail [member] | Stage 1 [member] | Financial assets at amortised cost [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Coverage ratio	0.20%	0.10%
Loans and advances [member] | Barclays UK [member] | Operating segments [member] | Barclays Group Retail [member] | Stage 1 [member] | Financial assets at amortised cost [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 153,250	£ 143,097
Loans and advances [member] | Barclays UK [member] | Operating segments [member] | Barclays Group Retail [member] | Stage 1 [member] | Financial assets at amortised cost [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 332	£ 198
Loans and advances [member] | Barclays UK [member] | Operating segments [member] | Barclays Group Retail [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Financial assets at amortised cost [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Coverage ratio	6.30%	5.50%
Loans and advances [member] | Barclays UK [member] | Operating segments [member] | Barclays Group Retail [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Financial assets at amortised cost [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 23,896	£ 23,198
Loans and advances [member] | Barclays UK [member] | Operating segments [member] | Barclays Group Retail [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Financial assets at amortised cost [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 1,509	£ 1,277
Loans and advances [member] | Barclays UK [member] | Operating segments [member] | Barclays Group Retail [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Financial assets at amortised cost [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Coverage ratio	42.00%	39.80%
Loans and advances [member] | Barclays UK [member] | Operating segments [member] | Barclays Group Retail [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Financial assets at amortised cost [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 2,732	£ 2,446
Loans and advances [member] | Barclays UK [member] | Operating segments [member] | Barclays Group Retail [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Financial assets at amortised cost [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	1,147	974
Loans and advances [member] | Barclays UK [member] | Operating segments [member] | Barclays Group Wholesale [member] | Financial assets at amortised cost [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ (37,111)	£ (31,250)
Coverage ratio	0.70%	0.50%
Credit impairment charges	£ 154	£ 33
Loan loss rate	0.41%	0.11%
Loans and advances [member] | Barclays UK [member] | Operating segments [member] | Barclays Group Wholesale [member] | Financial assets at amortised cost [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 37,369	£ 31,412
Loans and advances [member] | Barclays UK [member] | Operating segments [member] | Barclays Group Wholesale [member] | Financial assets at amortised cost [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 258	£ 162
Loans and advances [member] | Barclays UK [member] | Operating segments [member] | Barclays Group Wholesale [member] | Stage 1 [member] | Financial assets at amortised cost [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Coverage ratio	0.00%	0.10%
Loans and advances [member] | Barclays UK [member] | Operating segments [member] | Barclays Group Wholesale [member] | Stage 1 [member] | Financial assets at amortised cost [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 31,918	£ 27,891
Loans and advances [member] | Barclays UK [member] | Operating segments [member] | Barclays Group Wholesale [member] | Stage 1 [member] | Financial assets at amortised cost [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 13	£ 16
Loans and advances [member] | Barclays UK [member] | Operating segments [member] | Barclays Group Wholesale [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Financial assets at amortised cost [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Coverage ratio	3.00%	1.60%
Loans and advances [member] | Barclays UK [member] | Operating segments [member] | Barclays Group Wholesale [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Financial assets at amortised cost [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 4,325	£ 2,397
Loans and advances [member] | Barclays UK [member] | Operating segments [member] | Barclays Group Wholesale [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Financial assets at amortised cost [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 129	£ 38
Loans and advances [member] | Barclays UK [member] | Operating segments [member] | Barclays Group Wholesale [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Financial assets at amortised cost [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Coverage ratio	10.30%	9.60%
Loans and advances [member] | Barclays UK [member] | Operating segments [member] | Barclays Group Wholesale [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Financial assets at amortised cost [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 1,126	£ 1,124
Loans and advances [member] | Barclays UK [member] | Operating segments [member] | Barclays Group Wholesale [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Financial assets at amortised cost [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	116	108
Loans and advances [member] | Barclays International [member] | Operating segments [member] | Barclays Group Retail [member] | Financial assets at amortised cost [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ (25,610)	£ (31,302)
Coverage ratio	10.30%	7.40%
Credit impairment charges	£ 1,680	£ 999
Loan loss rate	5.89%	2.96%
Loans and advances [member] | Barclays International [member] | Operating segments [member] | Barclays Group Retail [member] | Financial assets at amortised cost [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 28,540	£ 33,787
Loans and advances [member] | Barclays International [member] | Operating segments [member] | Barclays Group Retail [member] | Financial assets at amortised cost [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 2,930	£ 2,485
Loans and advances [member] | Barclays International [member] | Operating segments [member] | Barclays Group Retail [member] | Stage 1 [member] | Financial assets at amortised cost [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Coverage ratio	1.90%	1.30%
Loans and advances [member] | Barclays International [member] | Operating segments [member] | Barclays Group Retail [member] | Stage 1 [member] | Financial assets at amortised cost [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 21,048	£ 27,886
Loans and advances [member] | Barclays International [member] | Operating segments [member] | Barclays Group Retail [member] | Stage 1 [member] | Financial assets at amortised cost [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 396	£ 352
Loans and advances [member] | Barclays International [member] | Operating segments [member] | Barclays Group Retail [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Financial assets at amortised cost [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Coverage ratio	24.20%	19.20%
Loans and advances [member] | Barclays International [member] | Operating segments [member] | Barclays Group Retail [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Financial assets at amortised cost [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 5,500	£ 4,026
Loans and advances [member] | Barclays International [member] | Operating segments [member] | Barclays Group Retail [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Financial assets at amortised cost [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 1,329	£ 774
Loans and advances [member] | Barclays International [member] | Operating segments [member] | Barclays Group Retail [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Financial assets at amortised cost [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Coverage ratio	60.50%	72.50%
Loans and advances [member] | Barclays International [member] | Operating segments [member] | Barclays Group Retail [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Financial assets at amortised cost [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 1,992	£ 1,875
Loans and advances [member] | Barclays International [member] | Operating segments [member] | Barclays Group Retail [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Financial assets at amortised cost [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	1,205	1,359
Loans and advances [member] | Barclays International [member] | Operating segments [member] | Barclays Group Wholesale [member] | Financial assets at amortised cost [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ (97,053)	£ (101,512)
Coverage ratio	1.70%	0.80%
Credit impairment charges	£ 914	£ 113
Loan loss rate	0.93%	0.11%
Loans and advances [member] | Barclays International [member] | Operating segments [member] | Barclays Group Wholesale [member] | Financial assets at amortised cost [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 98,746	£ 102,343
Loans and advances [member] | Barclays International [member] | Operating segments [member] | Barclays Group Wholesale [member] | Financial assets at amortised cost [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 1,693	£ 831
Loans and advances [member] | Barclays International [member] | Operating segments [member] | Barclays Group Wholesale [member] | Stage 1 [member] | Financial assets at amortised cost [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Coverage ratio	0.40%	0.10%
Loans and advances [member] | Barclays International [member] | Operating segments [member] | Barclays Group Wholesale [member] | Stage 1 [member] | Financial assets at amortised cost [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 79,911	£ 92,615
Loans and advances [member] | Barclays International [member] | Operating segments [member] | Barclays Group Wholesale [member] | Stage 1 [member] | Financial assets at amortised cost [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 288	£ 136
Loans and advances [member] | Barclays International [member] | Operating segments [member] | Barclays Group Wholesale [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Financial assets at amortised cost [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Coverage ratio	3.30%	3.10%
Loans and advances [member] | Barclays International [member] | Operating segments [member] | Barclays Group Wholesale [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Financial assets at amortised cost [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 16,565	£ 8,113
Loans and advances [member] | Barclays International [member] | Operating segments [member] | Barclays Group Wholesale [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Financial assets at amortised cost [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 546	£ 248
Loans and advances [member] | Barclays International [member] | Operating segments [member] | Barclays Group Wholesale [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Financial assets at amortised cost [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Coverage ratio	37.80%	27.70%
Loans and advances [member] | Barclays International [member] | Operating segments [member] | Barclays Group Wholesale [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Financial assets at amortised cost [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 2,270	£ 1,615
Loans and advances [member] | Barclays International [member] | Operating segments [member] | Barclays Group Wholesale [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Financial assets at amortised cost [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 859	447
Off balance sheet loan commitments and financial guarantee contracts [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets		£ (340,938)
Coverage ratio	0.30%	0.10%
Credit impairment charges	£ 776
Off balance sheet loan commitments and financial guarantee contracts [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	344,096
Off balance sheet loan commitments and financial guarantee contracts [member] | Financial assets at amortised cost [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Credit impairment charges		£ 71
Off balance sheet loan commitments and financial guarantee contracts [member] | Financial assets at amortised cost [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	345,160	341,260
Off balance sheet loan commitments and financial guarantee contracts [member] | Financial assets at amortised cost [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 1,064	£ 322
Off balance sheet loan commitments and financial guarantee contracts [member] | Stage 1 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Coverage ratio	0.10%	0.00%
Off balance sheet loan commitments and financial guarantee contracts [member] | Stage 1 [member] | Financial assets at amortised cost [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 289,939	£ 321,140
Off balance sheet loan commitments and financial guarantee contracts [member] | Stage 1 [member] | Financial assets at amortised cost [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 256	£ 97
Off balance sheet loan commitments and financial guarantee contracts [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Coverage ratio	1.40%	0.90%
Off balance sheet loan commitments and financial guarantee contracts [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Financial assets at amortised cost [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 52,891	£ 19,185
Off balance sheet loan commitments and financial guarantee contracts [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Financial assets at amortised cost [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 758	£ 170
Off balance sheet loan commitments and financial guarantee contracts [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Coverage ratio	2.10%	5.90%
Off balance sheet loan commitments and financial guarantee contracts [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Financial assets at amortised cost [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 2,330	£ 935
Off balance sheet loan commitments and financial guarantee contracts [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Financial assets at amortised cost [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	50	55
Other financial assets subject to impairment [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Credit impairment charges	153
Other financial assets subject to impairment [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	(180,300)	(149,300)	(129,900)
Other financial assets subject to impairment [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	165	24	12
Other financial assets subject to impairment [member] | Financial assets at amortised cost [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Credit impairment charges		8
Other financial assets subject to impairment [member] | Stage 1 [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	(175,700)	(148,500)	(129,300)
Other financial assets subject to impairment [member] | Stage 1 [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	11	12	10
Other financial assets subject to impairment [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	(4,400)	(800)	(600)
Other financial assets subject to impairment [member] | Lifetime expected credit losses [member] | Stage 2 [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 9	£ 2	£ 2

Other disclosures - Risk Mana_5

Other disclosures - Risk Management and Principal Risks - Loans and advances at amortised cost by stage (audited) (Narrative) (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ (1,329,242)	£ (1,119,650)
Loan loss rate	1.38%	0.55%
Credit impairment charges and other provisions	£ 4,838	£ 1,912	£ 1,468
ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	9,399	6,630
Financial assets designated at fair value [member]
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	9,500	17,700
Loans and advances at amortised cost, including off balance sheet loan commitments and financial guarantee contracts [member] | Financial assets at amortised cost [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	(686,728)	(680,053)
Loans and advances at amortised cost, including off balance sheet loan commitments and financial guarantee contracts [member] | Financial assets at amortised cost [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	696,127	686,683
Loans and advances at amortised cost, including off balance sheet loan commitments and financial guarantee contracts [member] | Financial assets at amortised cost [member] | Gross exposure [member] | Stage 1 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	580,903	620,406
Loans and advances at amortised cost, including off balance sheet loan commitments and financial guarantee contracts [member] | Financial assets at amortised cost [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	103,897	57,419
Loans and advances at amortised cost, including off balance sheet loan commitments and financial guarantee contracts [member] | Financial assets at amortised cost [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Financial instruments credit-impaired [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	11,327	8,858
Loans and advances at amortised cost, including off balance sheet loan commitments and financial guarantee contracts [member] | Financial assets at amortised cost [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	9,399	6,630
Loans and advances at amortised cost, including off balance sheet loan commitments and financial guarantee contracts [member] | Financial assets at amortised cost [member] | ECL | Stage 1 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	1,289	804
Loans and advances at amortised cost, including off balance sheet loan commitments and financial guarantee contracts [member] | Financial assets at amortised cost [member] | ECL | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	4,322	2,543
Loans and advances at amortised cost, including off balance sheet loan commitments and financial guarantee contracts [member] | Financial assets at amortised cost [member] | ECL | Lifetime expected credit losses [member] | Financial instruments credit-impaired [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	3,788	3,283
Off balance sheet loan commitments and financial guarantee contracts [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets		(340,938)
Credit impairment charges and other provisions	(776)
Off balance sheet loan commitments and financial guarantee contracts [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	344,096
Off balance sheet loan commitments and financial guarantee contracts [member] | Financial assets at amortised cost [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Credit impairment charges and other provisions		(71)
Off balance sheet loan commitments and financial guarantee contracts [member] | Financial assets at amortised cost [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	345,160	341,260
Off balance sheet loan commitments and financial guarantee contracts [member] | Financial assets at amortised cost [member] | Gross exposure [member] | Stage 1 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	289,939	321,140
Off balance sheet loan commitments and financial guarantee contracts [member] | Financial assets at amortised cost [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	52,891	19,185
Off balance sheet loan commitments and financial guarantee contracts [member] | Financial assets at amortised cost [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Financial instruments credit-impaired [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	2,330	935
Off balance sheet loan commitments and financial guarantee contracts [member] | Financial assets at amortised cost [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	1,064	322
Off balance sheet loan commitments and financial guarantee contracts [member] | Financial assets at amortised cost [member] | ECL | Stage 1 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	256	97
Off balance sheet loan commitments and financial guarantee contracts [member] | Financial assets at amortised cost [member] | ECL | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	758	170
Off balance sheet loan commitments and financial guarantee contracts [member] | Financial assets at amortised cost [member] | ECL | Lifetime expected credit losses [member] | Financial instruments credit-impaired [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	50	55
Other financial assets subject to impairment [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Credit impairment charges and other provisions	(153)
Other financial assets subject to impairment [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	(180,300)	(149,300)	(129,900)
Other financial assets subject to impairment [member] | Gross exposure [member] | Stage 1 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	(175,700)	(148,500)	(129,300)
Other financial assets subject to impairment [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	(4,400)	(800)	(600)
Other financial assets subject to impairment [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	165	24	12
Other financial assets subject to impairment [member] | ECL | Stage 1 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	11	12	10
Other financial assets subject to impairment [member] | ECL | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	9	2	2
Other financial assets subject to impairment [member] | Financial assets at amortised cost [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Credit impairment charges and other provisions		(8)
Other assets [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Financial instruments credit-impaired [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	(154)	(10)
Other assets [member] | ECL | Lifetime expected credit losses [member] | Financial instruments credit-impaired [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	145	10
Loans and advances [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Credit impairment charges and other provisions	4,685	1,904	£ 1,465
Loans and advances [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	(5,000)
Loans and advances [member] | Financial assets at amortised cost [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ (342,632)	£ (339,115)
Loan loss rate	1.11%	0.53%
Credit impairment charges and other provisions	£ (3,909)	£ (1,833)
Loans and advances [member] | Financial assets at amortised cost [member] | Barclays Group Retail [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	(207,896)	(203,377)
Loans and advances [member] | Financial assets at amortised cost [member] | Barclays Group Wholesale [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	(134,736)	(135,738)
Loans and advances [member] | Financial assets at amortised cost [member] | Stage 1 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	(289,931)	(298,559)
Loans and advances [member] | Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	(47,442)	(35,861)
Loans and advances [member] | Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Financial instruments credit-impaired [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	(5,259)	(4,695)
Loans and advances [member] | Financial assets at amortised cost [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	350,967	345,423
Loans and advances [member] | Financial assets at amortised cost [member] | Gross exposure [member] | Barclays Group Retail [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	214,249	208,657
Loans and advances [member] | Financial assets at amortised cost [member] | Gross exposure [member] | Barclays Group Wholesale [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	136,718	136,766
Loans and advances [member] | Financial assets at amortised cost [member] | Gross exposure [member] | Stage 1 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	290,964	299,266
Loans and advances [member] | Financial assets at amortised cost [member] | Gross exposure [member] | Stage 1 [member] | Barclays Group Retail [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	178,565	175,786
Loans and advances [member] | Financial assets at amortised cost [member] | Gross exposure [member] | Stage 1 [member] | Barclays Group Wholesale [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	112,399	123,480
Loans and advances [member] | Financial assets at amortised cost [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	51,006	38,234
Loans and advances [member] | Financial assets at amortised cost [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Barclays Group Retail [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	30,116	27,724
Loans and advances [member] | Financial assets at amortised cost [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Barclays Group Wholesale [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	20,890	10,510
Loans and advances [member] | Financial assets at amortised cost [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Financial instruments credit-impaired [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	8,997	7,923
Loans and advances [member] | Financial assets at amortised cost [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Financial instruments credit-impaired [member] | Barclays Group Retail [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	5,568	5,147
Loans and advances [member] | Financial assets at amortised cost [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Financial instruments credit-impaired [member] | Barclays Group Wholesale [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	3,429	2,776
Loans and advances [member] | Financial assets at amortised cost [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	8,335	6,308
Loans and advances [member] | Financial assets at amortised cost [member] | ECL | Barclays Group Retail [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	6,353	5,280
Loans and advances [member] | Financial assets at amortised cost [member] | ECL | Barclays Group Wholesale [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	1,982	1,028
Loans and advances [member] | Financial assets at amortised cost [member] | ECL | Stage 1 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	1,033	707
Loans and advances [member] | Financial assets at amortised cost [member] | ECL | Stage 1 [member] | Barclays Group Retail [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	732	555
Loans and advances [member] | Financial assets at amortised cost [member] | ECL | Stage 1 [member] | Barclays Group Wholesale [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	301	152
Loans and advances [member] | Financial assets at amortised cost [member] | ECL | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	3,564	2,373
Loans and advances [member] | Financial assets at amortised cost [member] | ECL | Lifetime expected credit losses [member] | Stage 2 [member] | Barclays Group Retail [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	2,889	2,087
Loans and advances [member] | Financial assets at amortised cost [member] | ECL | Lifetime expected credit losses [member] | Stage 2 [member] | Barclays Group Wholesale [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	675	286
Loans and advances [member] | Financial assets at amortised cost [member] | ECL | Lifetime expected credit losses [member] | Financial instruments credit-impaired [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	3,738	3,228
Loans and advances [member] | Financial assets at amortised cost [member] | ECL | Lifetime expected credit losses [member] | Financial instruments credit-impaired [member] | Barclays Group Retail [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	2,732	2,638
Loans and advances [member] | Financial assets at amortised cost [member] | ECL | Lifetime expected credit losses [member] | Financial instruments credit-impaired [member] | Barclays Group Wholesale [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	1,006	590
Wholesale loans [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	(7,551)	(6,434)
Wholesale loans [member] | Financial assets at amortised cost [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	(142,172)	(129,340)
Wholesale loans [member] | Financial assets at amortised cost [member] | Stage 1 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	(118,984)	(117,398)
Wholesale loans [member] | Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	(20,663)	(10,130)
Wholesale loans [member] | Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Financial instruments credit-impaired [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	(2,525)	(1,812)
Wholesale loans [member] | Financial assets at amortised cost [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	144,269	130,332
Wholesale loans [member] | Financial assets at amortised cost [member] | Gross exposure [member] | Stage 1 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	119,304	117,541
Wholesale loans [member] | Financial assets at amortised cost [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	21,374	10,432
Wholesale loans [member] | Financial assets at amortised cost [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Financial instruments credit-impaired [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	3,591	2,359
Wholesale loans [member] | Financial assets at amortised cost [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	2,097	992
Wholesale loans [member] | Financial assets at amortised cost [member] | ECL | Stage 1 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	320	143
Wholesale loans [member] | Financial assets at amortised cost [member] | ECL | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	711	302
Wholesale loans [member] | Financial assets at amortised cost [member] | ECL | Lifetime expected credit losses [member] | Financial instruments credit-impaired [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 1,066	£ 547

Other disclosures - Risk Mana_6

Other disclosures - Risk Management and Principal Risks - Loans and advances at amortised cost by product (audited) (Details) - GBP (£) £ in Millions	Dec. 31, 2020	Dec. 31, 2019
Disclosure of financial assets [line items]
Financial assets	£ (1,329,242)	£ (1,119,650)
ECL
Disclosure of financial assets [line items]
Financial assets	9,399	6,630
Loans and advances [member] | Gross exposure [member]
Disclosure of financial assets [line items]
Financial assets	(5,000)
Wholesale loans [member]
Disclosure of financial assets [line items]
Financial assets	(7,551)	(6,434)
Financial assets at amortised cost [member] | Loans and advances [member]
Disclosure of financial assets [line items]
Financial assets	£ (342,632)	£ (339,115)
Coverage ratio	2.40%	1.80%
Financial assets at amortised cost [member] | Loans and advances [member] | Gross exposure [member]
Disclosure of financial assets [line items]
Financial assets	£ 350,967	£ 345,423
Financial assets at amortised cost [member] | Loans and advances [member] | ECL
Disclosure of financial assets [line items]
Financial assets	8,335	6,308
Financial assets at amortised cost [member] | Loans and advances [member] | Stage 1 [member]
Disclosure of financial assets [line items]
Financial assets	£ (289,931)	£ (298,559)
Coverage ratio	0.40%	0.20%
Financial assets at amortised cost [member] | Loans and advances [member] | Stage 1 [member] | Gross exposure [member]
Disclosure of financial assets [line items]
Financial assets	£ 290,964	£ 299,266
Financial assets at amortised cost [member] | Loans and advances [member] | Stage 1 [member] | ECL
Disclosure of financial assets [line items]
Financial assets	1,033	707
Financial assets at amortised cost [member] | Loans and advances [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of financial assets [line items]
Financial assets	£ (47,442)	£ (35,861)
Coverage ratio	7.00%	6.20%
Financial assets at amortised cost [member] | Loans and advances [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Gross exposure [member]
Disclosure of financial assets [line items]
Financial assets	£ 51,006	£ 38,234
Financial assets at amortised cost [member] | Loans and advances [member] | Lifetime expected credit losses [member] | Stage 2 [member] | ECL
Disclosure of financial assets [line items]
Financial assets	3,564	2,373
Financial assets at amortised cost [member] | Loans and advances [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of financial assets [line items]
Financial assets	£ (5,259)	£ (4,695)
Coverage ratio	41.50%	40.70%
Financial assets at amortised cost [member] | Loans and advances [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Gross exposure [member]
Disclosure of financial assets [line items]
Financial assets	£ 8,997	£ 7,923
Financial assets at amortised cost [member] | Loans and advances [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | ECL
Disclosure of financial assets [line items]
Financial assets	3,738	3,228
Financial assets at amortised cost [member] | Home loans [member]
Disclosure of financial assets [line items]
Financial assets	£ (159,647)	£ (154,479)
Coverage ratio	0.30%	0.30%
Financial assets at amortised cost [member] | Home loans [member] | Gross exposure [member]
Disclosure of financial assets [line items]
Financial assets	£ 160,185	£ 154,911
Financial assets at amortised cost [member] | Home loans [member] | ECL
Disclosure of financial assets [line items]
Financial assets	538	432
Financial assets at amortised cost [member] | Home loans [member] | Stage 1 [member]
Disclosure of financial assets [line items]
Financial assets	£ (138,606)	£ (135,691)
Coverage ratio	0.00%	0.00%
Financial assets at amortised cost [member] | Home loans [member] | Stage 1 [member] | Gross exposure [member]
Disclosure of financial assets [line items]
Financial assets	£ 138,639	£ 135,713
Financial assets at amortised cost [member] | Home loans [member] | Stage 1 [member] | ECL
Disclosure of financial assets [line items]
Financial assets	33	22
Financial assets at amortised cost [member] | Home loans [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of financial assets [line items]
Financial assets	£ (19,228)	£ (16,979)
Coverage ratio	0.40%	0.40%
Financial assets at amortised cost [member] | Home loans [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Gross exposure [member]
Disclosure of financial assets [line items]
Financial assets	£ 19,312	£ 17,043
Financial assets at amortised cost [member] | Home loans [member] | Lifetime expected credit losses [member] | Stage 2 [member] | ECL
Disclosure of financial assets [line items]
Financial assets	84	64
Financial assets at amortised cost [member] | Home loans [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of financial assets [line items]
Financial assets	£ (1,813)	£ (1,809)
Coverage ratio	18.80%	16.10%
Financial assets at amortised cost [member] | Home loans [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Gross exposure [member]
Disclosure of financial assets [line items]
Financial assets	£ 2,234	£ 2,155
Financial assets at amortised cost [member] | Home loans [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | ECL
Disclosure of financial assets [line items]
Financial assets	421	346
Financial assets at amortised cost [member] | Credit cards, unsecured loans and other retail lending [member]
Disclosure of financial assets [line items]
Financial assets	£ (40,813)	£ (55,296)
Coverage ratio	12.30%	8.10%
Financial assets at amortised cost [member] | Credit cards, unsecured loans and other retail lending [member] | Gross exposure [member]
Disclosure of financial assets [line items]
Financial assets	£ 46,513	£ 60,180
Financial assets at amortised cost [member] | Credit cards, unsecured loans and other retail lending [member] | ECL
Disclosure of financial assets [line items]
Financial assets	5,700	4,884
Financial assets at amortised cost [member] | Credit cards, unsecured loans and other retail lending [member] | Stage 1 [member]
Disclosure of financial assets [line items]
Financial assets	£ (32,341)	£ (45,470)
Coverage ratio	2.10%	1.20%
Financial assets at amortised cost [member] | Credit cards, unsecured loans and other retail lending [member] | Stage 1 [member] | Gross exposure [member]
Disclosure of financial assets [line items]
Financial assets	£ 33,021	£ 46,012
Financial assets at amortised cost [member] | Credit cards, unsecured loans and other retail lending [member] | Stage 1 [member] | ECL
Disclosure of financial assets [line items]
Financial assets	680	542
Financial assets at amortised cost [member] | Credit cards, unsecured loans and other retail lending [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of financial assets [line items]
Financial assets	£ (7,551)	£ (8,752)
Coverage ratio	26.80%	18.70%
Financial assets at amortised cost [member] | Credit cards, unsecured loans and other retail lending [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Gross exposure [member]
Disclosure of financial assets [line items]
Financial assets	£ 10,320	£ 10,759
Financial assets at amortised cost [member] | Credit cards, unsecured loans and other retail lending [member] | Lifetime expected credit losses [member] | Stage 2 [member] | ECL
Disclosure of financial assets [line items]
Financial assets	2,769	2,007
Financial assets at amortised cost [member] | Credit cards, unsecured loans and other retail lending [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of financial assets [line items]
Financial assets	£ (921)	£ (1,074)
Coverage ratio	71.00%	68.50%
Financial assets at amortised cost [member] | Credit cards, unsecured loans and other retail lending [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Gross exposure [member]
Disclosure of financial assets [line items]
Financial assets	£ 3,172	£ 3,409
Financial assets at amortised cost [member] | Credit cards, unsecured loans and other retail lending [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | ECL
Disclosure of financial assets [line items]
Financial assets	2,251	2,335
Financial assets at amortised cost [member] | Wholesale loans [member]
Disclosure of financial assets [line items]
Financial assets	£ (142,172)	£ (129,340)
Coverage ratio	1.50%	0.80%
Financial assets at amortised cost [member] | Wholesale loans [member] | Gross exposure [member]
Disclosure of financial assets [line items]
Financial assets	£ 144,269	£ 130,332
Financial assets at amortised cost [member] | Wholesale loans [member] | ECL
Disclosure of financial assets [line items]
Financial assets	2,097	992
Financial assets at amortised cost [member] | Wholesale loans [member] | Stage 1 [member]
Disclosure of financial assets [line items]
Financial assets	£ (118,984)	£ (117,398)
Coverage ratio	0.30%	0.10%
Financial assets at amortised cost [member] | Wholesale loans [member] | Stage 1 [member] | Gross exposure [member]
Disclosure of financial assets [line items]
Financial assets	£ 119,304	£ 117,541
Financial assets at amortised cost [member] | Wholesale loans [member] | Stage 1 [member] | ECL
Disclosure of financial assets [line items]
Financial assets	320	143
Financial assets at amortised cost [member] | Wholesale loans [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of financial assets [line items]
Financial assets	£ (20,663)	£ (10,130)
Coverage ratio	3.30%	2.90%
Financial assets at amortised cost [member] | Wholesale loans [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Gross exposure [member]
Disclosure of financial assets [line items]
Financial assets	£ 21,374	£ 10,432
Financial assets at amortised cost [member] | Wholesale loans [member] | Lifetime expected credit losses [member] | Stage 2 [member] | ECL
Disclosure of financial assets [line items]
Financial assets	711	302
Financial assets at amortised cost [member] | Wholesale loans [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of financial assets [line items]
Financial assets	£ (2,525)	£ (1,812)
Coverage ratio	29.70%	23.20%
Financial assets at amortised cost [member] | Wholesale loans [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Gross exposure [member]
Disclosure of financial assets [line items]
Financial assets	£ 3,591	£ 2,359
Financial assets at amortised cost [member] | Wholesale loans [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | ECL
Disclosure of financial assets [line items]
Financial assets	1,066	547
Not past due [member] | Financial assets at amortised cost [member] | Loans and advances [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of financial assets [line items]
Financial assets	£ (42,533)	£ (31,948)
Coverage ratio	6.80%	5.70%
Not past due [member] | Financial assets at amortised cost [member] | Loans and advances [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Gross exposure [member]
Disclosure of financial assets [line items]
Financial assets	£ 45,622	£ 33,866
Not past due [member] | Financial assets at amortised cost [member] | Loans and advances [member] | Lifetime expected credit losses [member] | Stage 2 [member] | ECL
Disclosure of financial assets [line items]
Financial assets	3,089	1,918
Not past due [member] | Financial assets at amortised cost [member] | Home loans [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of financial assets [line items]
Financial assets	£ (16,594)	£ (14,696)
Coverage ratio	0.30%	0.30%
Not past due [member] | Financial assets at amortised cost [member] | Home loans [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Gross exposure [member]
Disclosure of financial assets [line items]
Financial assets	£ 16,651	£ 14,733
Not past due [member] | Financial assets at amortised cost [member] | Home loans [member] | Lifetime expected credit losses [member] | Stage 2 [member] | ECL
Disclosure of financial assets [line items]
Financial assets	57	37
Not past due [member] | Financial assets at amortised cost [member] | Credit cards, unsecured loans and other retail lending [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of financial assets [line items]
Financial assets	£ (7,088)	£ (8,162)
Coverage ratio	25.20%	16.40%
Not past due [member] | Financial assets at amortised cost [member] | Credit cards, unsecured loans and other retail lending [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Gross exposure [member]
Disclosure of financial assets [line items]
Financial assets	£ 9,470	£ 9,759
Not past due [member] | Financial assets at amortised cost [member] | Credit cards, unsecured loans and other retail lending [member] | Lifetime expected credit losses [member] | Stage 2 [member] | ECL
Disclosure of financial assets [line items]
Financial assets	2,382	1,597
Not past due [member] | Financial assets at amortised cost [member] | Wholesale loans [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of financial assets [line items]
Financial assets	£ (18,851)	£ (9,090)
Coverage ratio	3.30%	3.00%
Not past due [member] | Financial assets at amortised cost [member] | Wholesale loans [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Gross exposure [member]
Disclosure of financial assets [line items]
Financial assets	£ 19,501	£ 9,374
Not past due [member] | Financial assets at amortised cost [member] | Wholesale loans [member] | Lifetime expected credit losses [member] | Stage 2 [member] | ECL
Disclosure of financial assets [line items]
Financial assets	650	284
Equal to or Less than 30 days past due [member] | Financial assets at amortised cost [member] | Loans and advances [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of financial assets [line items]
Financial assets	£ (3,183)	£ (2,273)
Coverage ratio	7.10%	7.40%
Equal to or Less than 30 days past due [member] | Financial assets at amortised cost [member] | Loans and advances [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Gross exposure [member]
Disclosure of financial assets [line items]
Financial assets	£ 3,426	£ 2,455
Equal to or Less than 30 days past due [member] | Financial assets at amortised cost [member] | Loans and advances [member] | Lifetime expected credit losses [member] | Stage 2 [member] | ECL
Disclosure of financial assets [line items]
Financial assets	243	182
Equal to or Less than 30 days past due [member] | Financial assets at amortised cost [member] | Home loans [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of financial assets [line items]
Financial assets	£ (1,772)	£ (1,571)
Coverage ratio	0.70%	0.90%
Equal to or Less than 30 days past due [member] | Financial assets at amortised cost [member] | Home loans [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Gross exposure [member]
Disclosure of financial assets [line items]
Financial assets	£ 1,785	£ 1,585
Equal to or Less than 30 days past due [member] | Financial assets at amortised cost [member] | Home loans [member] | Lifetime expected credit losses [member] | Stage 2 [member] | ECL
Disclosure of financial assets [line items]
Financial assets	13	14
Equal to or Less than 30 days past due [member] | Financial assets at amortised cost [member] | Credit cards, unsecured loans and other retail lending [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of financial assets [line items]
Financial assets	£ (364)	£ (337)
Coverage ratio	33.10%	32.10%
Equal to or Less than 30 days past due [member] | Financial assets at amortised cost [member] | Credit cards, unsecured loans and other retail lending [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Gross exposure [member]
Disclosure of financial assets [line items]
Financial assets	£ 544	£ 496
Equal to or Less than 30 days past due [member] | Financial assets at amortised cost [member] | Credit cards, unsecured loans and other retail lending [member] | Lifetime expected credit losses [member] | Stage 2 [member] | ECL
Disclosure of financial assets [line items]
Financial assets	180	159
Equal to or Less than 30 days past due [member] | Financial assets at amortised cost [member] | Wholesale loans [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of financial assets [line items]
Financial assets	£ (1,047)	£ (365)
Coverage ratio	4.60%	2.40%
Equal to or Less than 30 days past due [member] | Financial assets at amortised cost [member] | Wholesale loans [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Gross exposure [member]
Disclosure of financial assets [line items]
Financial assets	£ 1,097	£ 374
Equal to or Less than 30 days past due [member] | Financial assets at amortised cost [member] | Wholesale loans [member] | Lifetime expected credit losses [member] | Stage 2 [member] | ECL
Disclosure of financial assets [line items]
Financial assets	50	9
Greater than 30 days past due [member] | Financial assets at amortised cost [member] | Loans and advances [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of financial assets [line items]
Financial assets	£ (1,726)	£ (1,640)
Coverage ratio	11.80%	14.30%
Greater than 30 days past due [member] | Financial assets at amortised cost [member] | Loans and advances [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Gross exposure [member]
Disclosure of financial assets [line items]
Financial assets	£ 1,958	£ 1,913
Greater than 30 days past due [member] | Financial assets at amortised cost [member] | Loans and advances [member] | Lifetime expected credit losses [member] | Stage 2 [member] | ECL
Disclosure of financial assets [line items]
Financial assets	232	273
Greater than 30 days past due [member] | Financial assets at amortised cost [member] | Home loans [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of financial assets [line items]
Financial assets	£ (862)	£ (712)
Coverage ratio	1.60%	1.80%
Greater than 30 days past due [member] | Financial assets at amortised cost [member] | Home loans [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Gross exposure [member]
Disclosure of financial assets [line items]
Financial assets	£ 876	£ 725
Greater than 30 days past due [member] | Financial assets at amortised cost [member] | Home loans [member] | Lifetime expected credit losses [member] | Stage 2 [member] | ECL
Disclosure of financial assets [line items]
Financial assets	14	13
Greater than 30 days past due [member] | Financial assets at amortised cost [member] | Credit cards, unsecured loans and other retail lending [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of financial assets [line items]
Financial assets	£ (99)	£ (253)
Coverage ratio	67.60%	49.80%
Greater than 30 days past due [member] | Financial assets at amortised cost [member] | Credit cards, unsecured loans and other retail lending [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Gross exposure [member]
Disclosure of financial assets [line items]
Financial assets	£ 306	£ 504
Greater than 30 days past due [member] | Financial assets at amortised cost [member] | Credit cards, unsecured loans and other retail lending [member] | Lifetime expected credit losses [member] | Stage 2 [member] | ECL
Disclosure of financial assets [line items]
Financial assets	207	251
Greater than 30 days past due [member] | Financial assets at amortised cost [member] | Wholesale loans [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of financial assets [line items]
Financial assets	£ (765)	£ (675)
Coverage ratio	1.40%	1.30%
Greater than 30 days past due [member] | Financial assets at amortised cost [member] | Wholesale loans [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Gross exposure [member]
Disclosure of financial assets [line items]
Financial assets	£ 776	£ 684
Greater than 30 days past due [member] | Financial assets at amortised cost [member] | Wholesale loans [member] | Lifetime expected credit losses [member] | Stage 2 [member] | ECL
Disclosure of financial assets [line items]
Financial assets	£ 11	£ 9

Other disclosures - Risk Mana_7

Other disclosures - Risk Management and Principal Risks - Gross exposure for loans and advances at amortised cost (audited) (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Gross exposure [member] | Home loans [member]
Loans and advances at amortised cost
Opening/Beginning balance	£ 154,911	£ 150,748
Business activity in the year	(23,266)	(25,672)
Changes to models used for calculation	0	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(7,093)	(7,988)
Final repayments	(10,877)	(12,708)
Disposals	0	787
Write-offs	(22)	(26)
Closing/Ending balance	160,185	154,911	£ 150,748
Gross exposure [member] | Credit cards, unsecured loans and other retail lending [member]
Loans and advances at amortised cost
Opening/Beginning balance	60,180	61,774
Business activity in the year	(5,981)	(10,457)
Changes to models used for calculation	0	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(12,394)	(5,251)
Final repayments	(3,765)	(4,328)
Disposals	(1,880)	777
Write-offs	(1,609)	(1,695)
Closing/Ending balance	46,513	60,180	61,774
Gross exposure [member] | Wholesale loans [member]
Loans and advances at amortised cost
Opening/Beginning balance	130,332	120,654
Business activity in the year	(30,833)	(42,625)
Changes to models used for calculation	0	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	17,575	6,372
Final repayments	(31,734)	(36,872)
Disposals	(2,404)	2,285
Write-offs	(333)	(162)
Closing/Ending balance	144,269	130,332	120,654
Impairment [member] | Home loans [member]
Loans and advances at amortised cost
Opening/Beginning balance	432	464
Business activity in the year	(9)	(5)
Changes to models used for calculation	0	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	138	13
Final repayments	19	19
Disposals	0	5
Write-offs	22	26
Closing/Ending balance	538	432	464
Impairment [member] | Credit cards, unsecured loans and other retail lending [member]
Loans and advances at amortised cost
Opening/Beginning balance	4,884	5,343
Business activity in the year	(178)	(282)
Changes to models used for calculation	309	(101)
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	2,298	1,863
Final repayments	188	181
Disposals	(172)	627
Write-offs	1,609	1,695
Closing/Ending balance	5,700	4,884	5,343
Impairment [member] | Wholesale loans [member]
Loans and advances at amortised cost
Opening/Beginning balance	992	963
Business activity in the year	(280)	(78)
Changes to models used for calculation	0	(28)
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	1,268	315
Final repayments	110	174
Disposals	0	0
Write-offs	333	162
Closing/Ending balance	2,097	992	963
Stage 1 [member] | Gross exposure [member] | Home loans [member]
Loans and advances at amortised cost
Opening/Beginning balance	135,713	130,066
Business activity in the year	(22,548)	(24,935)
Changes to models used for calculation	0	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(6,195)	(6,931)
Final repayments	(9,060)	(10,427)
Disposals	0	723
Write-offs	0	0
Closing/Ending balance	138,639	135,713	130,066
Stage 1 [member] | Gross exposure [member] | Credit cards, unsecured loans and other retail lending [member]
Loans and advances at amortised cost
Opening/Beginning balance	46,012	45,785
Business activity in the year	(5,598)	(9,664)
Changes to models used for calculation	0	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(9,678)	(5,975)
Final repayments	(3,291)	(3,667)
Disposals	(1,493)	0
Write-offs	0	0
Closing/Ending balance	33,021	46,012	45,785
Stage 1 [member] | Gross exposure [member] | Wholesale loans [member]
Loans and advances at amortised cost
Opening/Beginning balance	117,541	105,375
Business activity in the year	(27,863)	(40,837)
Changes to models used for calculation	0	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	13,828	5,929
Final repayments	(28,458)	(34,081)
Disposals	(2,394)	2,285
Write-offs	0	0
Closing/Ending balance	119,304	117,541	105,375
Stage 1 [member] | Impairment [member] | Home loans [member]
Loans and advances at amortised cost
Opening/Beginning balance	22	31
Business activity in the year	(7)	(3)
Changes to models used for calculation	0	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(9)	(38)
Final repayments	1	2
Disposals	0	1
Write-offs	0	0
Closing/Ending balance	33	22	31
Stage 1 [member] | Impairment [member] | Credit cards, unsecured loans and other retail lending [member]
Loans and advances at amortised cost
Opening/Beginning balance	542	528
Business activity in the year	(67)	(120)
Changes to models used for calculation	13	16
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(229)	(779)
Final repayments	67	54
Disposals	(8)	0
Write-offs	0	0
Closing/Ending balance	680	542	528
Stage 1 [member] | Impairment [member] | Wholesale loans [member]
Loans and advances at amortised cost
Opening/Beginning balance	143	129
Business activity in the year	(46)	(51)
Changes to models used for calculation	0	(9)
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	130	(104)
Final repayments	22	30
Disposals	0	0
Write-offs	0	0
Closing/Ending balance	320	143	129
Lifetime expected credit losses [member] | Stage 2 [member] | Gross exposure [member] | Home loans [member]
Loans and advances at amortised cost
Opening/Beginning balance	17,043	18,206
Business activity in the year	(714)	(734)
Changes to models used for calculation	0	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(841)	(843)
Final repayments	(1,509)	(1,827)
Disposals	0	62
Write-offs	0	0
Closing/Ending balance	19,312	17,043	18,206
Lifetime expected credit losses [member] | Stage 2 [member] | Gross exposure [member] | Credit cards, unsecured loans and other retail lending [member]
Loans and advances at amortised cost
Opening/Beginning balance	10,759	12,229
Business activity in the year	(324)	(704)
Changes to models used for calculation	0	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(2,706)	351
Final repayments	(270)	(371)
Disposals	(183)	0
Write-offs	0	0
Closing/Ending balance	10,320	10,759	12,229
Lifetime expected credit losses [member] | Stage 2 [member] | Gross exposure [member] | Wholesale loans [member]
Loans and advances at amortised cost
Opening/Beginning balance	10,432	13,012
Business activity in the year	(2,336)	(1,757)
Changes to models used for calculation	0	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	3,811	321
Final repayments	(2,977)	(2,419)
Disposals	(10)	0
Write-offs	0	0
Closing/Ending balance	21,374	10,432	13,012
Lifetime expected credit losses [member] | Stage 2 [member] | Impairment [member] | Home loans [member]
Loans and advances at amortised cost
Opening/Beginning balance	64	82
Business activity in the year	(2)	(2)
Changes to models used for calculation	0	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	42	27
Final repayments	3	4
Disposals	0	4
Write-offs	0	0
Closing/Ending balance	84	64	82
Lifetime expected credit losses [member] | Stage 2 [member] | Impairment [member] | Credit cards, unsecured loans and other retail lending [member]
Loans and advances at amortised cost
Opening/Beginning balance	2,007	2,304
Business activity in the year	(83)	(123)
Changes to models used for calculation	296	(110)
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	1,174	806
Final repayments	37	53
Disposals	(20)	0
Write-offs	0	0
Closing/Ending balance	2,769	2,007	2,304
Lifetime expected credit losses [member] | Stage 2 [member] | Impairment [member] | Wholesale loans [member]
Loans and advances at amortised cost
Opening/Beginning balance	302	329
Business activity in the year	(149)	(27)
Changes to models used for calculation	0	(19)
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	339	85
Final repayments	29	53
Disposals	0	0
Write-offs	0	0
Closing/Ending balance	711	302	329
Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Gross exposure [member] | Home loans [member]
Loans and advances at amortised cost
Opening/Beginning balance	2,155	2,476
Business activity in the year	(4)	(3)
Changes to models used for calculation	0	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(57)	(214)
Final repayments	(308)	(454)
Disposals	0	2
Write-offs	(22)	(26)
Closing/Ending balance	2,234	2,155	2,476
Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Gross exposure [member] | Credit cards, unsecured loans and other retail lending [member]
Loans and advances at amortised cost
Opening/Beginning balance	3,409	3,760
Business activity in the year	(59)	(89)
Changes to models used for calculation	0	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(10)	373
Final repayments	(204)	(290)
Disposals	(204)	777
Write-offs	(1,609)	(1,695)
Closing/Ending balance	3,172	3,409	3,760
Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Gross exposure [member] | Wholesale loans [member]
Loans and advances at amortised cost
Opening/Beginning balance	2,359	2,267
Business activity in the year	(634)	(31)
Changes to models used for calculation	0	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(64)	122
Final repayments	(299)	(372)
Disposals	0	0
Write-offs	(333)	(162)
Closing/Ending balance	3,591	2,359	2,267
Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Impairment [member] | Home loans [member]
Loans and advances at amortised cost
Opening/Beginning balance	346	351
Business activity in the year	0	0
Changes to models used for calculation	0	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	105	24
Final repayments	15	13
Disposals	0	0
Write-offs	22	26
Closing/Ending balance	421	346	351
Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Impairment [member] | Credit cards, unsecured loans and other retail lending [member]
Loans and advances at amortised cost
Opening/Beginning balance	2,335	2,511
Business activity in the year	(28)	(39)
Changes to models used for calculation	0	(7)
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	1,353	1,836
Final repayments	84	74
Disposals	(144)	627
Write-offs	1,609	1,695
Closing/Ending balance	2,251	2,335	2,511
Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Impairment [member] | Wholesale loans [member]
Loans and advances at amortised cost
Opening/Beginning balance	547	505
Business activity in the year	(85)	0
Changes to models used for calculation	0	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	799	334
Final repayments	59	91
Disposals	0	0
Write-offs	333	162
Closing/Ending balance	1,066	547	505
Financial assets at amortised cost [member] | Gross exposure [member] | Loans and advances [member]
Loans and advances at amortised cost
Write-offs	(1,964)	(1,883)	£ (1,891)
Financial assets at amortised cost [member] | Gross exposure [member] | Credit cards, unsecured loans and other retail lending [member]
Loans and advances at amortised cost
Disposals	(1,900)
Financial assets at amortised cost [member] | Gross exposure [member] | Wholesale loans [member]
Loans and advances at amortised cost
Disposals	(2,400)
Financial assets at amortised cost [member] | Impairment [member] | Credit cards, unsecured loans and other retail lending [member]
Loans and advances at amortised cost
Changes to models used for calculation	309
Transfers from Stage 1 to stage 2 [member] | Gross exposure [member] | Home loans [member]
Loans and advances at amortised cost
Transfers	0	0
Transfers from Stage 1 to stage 2 [member] | Gross exposure [member] | Credit cards, unsecured loans and other retail lending [member]
Loans and advances at amortised cost
Transfers	0	0
Transfers from Stage 1 to stage 2 [member] | Gross exposure [member] | Wholesale loans [member]
Loans and advances at amortised cost
Transfers	0	0
Transfers from Stage 1 to stage 2 [member] | Impairment [member] | Home loans [member]
Loans and advances at amortised cost
Transfers	0	0
Transfers from Stage 1 to stage 2 [member] | Impairment [member] | Credit cards, unsecured loans and other retail lending [member]
Loans and advances at amortised cost
Transfers	0	0
Transfers from Stage 1 to stage 2 [member] | Impairment [member] | Wholesale loans [member]
Loans and advances at amortised cost
Transfers	0	0
Transfers from Stage 1 to stage 2 [member] | Stage 1 [member] | Gross exposure [member] | Home loans [member]
Loans and advances at amortised cost
Transfers	(8,724)	(9,051)
Transfers from Stage 1 to stage 2 [member] | Stage 1 [member] | Gross exposure [member] | Credit cards, unsecured loans and other retail lending [member]
Loans and advances at amortised cost
Transfers	(6,571)	(3,604)
Transfers from Stage 1 to stage 2 [member] | Stage 1 [member] | Gross exposure [member] | Wholesale loans [member]
Loans and advances at amortised cost
Transfers	(12,531)	(3,419)
Transfers from Stage 1 to stage 2 [member] | Stage 1 [member] | Impairment [member] | Home loans [member]
Loans and advances at amortised cost
Transfers	(1)	(1)
Transfers from Stage 1 to stage 2 [member] | Stage 1 [member] | Impairment [member] | Credit cards, unsecured loans and other retail lending [member]
Loans and advances at amortised cost
Transfers	(134)	(72)
Transfers from Stage 1 to stage 2 [member] | Stage 1 [member] | Impairment [member] | Wholesale loans [member]
Loans and advances at amortised cost
Transfers	(35)	(11)
Transfers from Stage 1 to stage 2 [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Gross exposure [member] | Home loans [member]
Loans and advances at amortised cost
Transfers	8,724	9,051
Transfers from Stage 1 to stage 2 [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Gross exposure [member] | Credit cards, unsecured loans and other retail lending [member]
Loans and advances at amortised cost
Transfers	6,571	3,604
Transfers from Stage 1 to stage 2 [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Gross exposure [member] | Wholesale loans [member]
Loans and advances at amortised cost
Transfers	12,531	3,419
Transfers from Stage 1 to stage 2 [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Impairment [member] | Home loans [member]
Loans and advances at amortised cost
Transfers	1	1
Transfers from Stage 1 to stage 2 [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Impairment [member] | Credit cards, unsecured loans and other retail lending [member]
Loans and advances at amortised cost
Transfers	134	72
Transfers from Stage 1 to stage 2 [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Impairment [member] | Wholesale loans [member]
Loans and advances at amortised cost
Transfers	35	11
Transfers from Stage 1 to stage 2 [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Gross exposure [member] | Home loans [member]
Loans and advances at amortised cost
Transfers	0	0
Transfers from Stage 1 to stage 2 [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Gross exposure [member] | Credit cards, unsecured loans and other retail lending [member]
Loans and advances at amortised cost
Transfers	0	0
Transfers from Stage 1 to stage 2 [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Gross exposure [member] | Wholesale loans [member]
Loans and advances at amortised cost
Transfers	0	0
Transfers from Stage 1 to stage 2 [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Impairment [member] | Home loans [member]
Loans and advances at amortised cost
Transfers	0	0
Transfers from Stage 1 to stage 2 [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Impairment [member] | Credit cards, unsecured loans and other retail lending [member]
Loans and advances at amortised cost
Transfers	0	0
Transfers from Stage 1 to stage 2 [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Impairment [member] | Wholesale loans [member]
Loans and advances at amortised cost
Transfers	0	0
Transfers from stage 2 to stage 1 [Member] | Gross exposure [member] | Loans and advances [member]
Loans and advances at amortised cost
Transfers	2,000
Transfers from stage 2 to stage 1 [Member] | Gross exposure [member] | Home loans [member]
Loans and advances at amortised cost
Transfers	0	0
Transfers from stage 2 to stage 1 [Member] | Gross exposure [member] | Credit cards, unsecured loans and other retail lending [member]
Loans and advances at amortised cost
Transfers	0	0
Transfers from stage 2 to stage 1 [Member] | Gross exposure [member] | Wholesale loans [member]
Loans and advances at amortised cost
Transfers	0	0
Transfers from stage 2 to stage 1 [Member] | Impairment [member] | Home loans [member]
Loans and advances at amortised cost
Transfers	0	0
Transfers from stage 2 to stage 1 [Member] | Impairment [member] | Credit cards, unsecured loans and other retail lending [member]
Loans and advances at amortised cost
Transfers	0	0
Transfers from stage 2 to stage 1 [Member] | Impairment [member] | Wholesale loans [member]
Loans and advances at amortised cost
Transfers	0	0
Transfers from stage 2 to stage 1 [Member] | Stage 1 [member] | Gross exposure [member] | Home loans [member]
Loans and advances at amortised cost
Transfers	4,618	8,000
Transfers from stage 2 to stage 1 [Member] | Stage 1 [member] | Gross exposure [member] | Credit cards, unsecured loans and other retail lending [member]
Loans and advances at amortised cost
Transfers	3,080	4,522
Transfers from stage 2 to stage 1 [Member] | Stage 1 [member] | Gross exposure [member] | Wholesale loans [member]
Loans and advances at amortised cost
Transfers	4,121	5,213
Transfers from stage 2 to stage 1 [Member] | Stage 1 [member] | Impairment [member] | Home loans [member]
Loans and advances at amortised cost
Transfers	14	28
Transfers from stage 2 to stage 1 [Member] | Stage 1 [member] | Impairment [member] | Credit cards, unsecured loans and other retail lending [member]
Loans and advances at amortised cost
Transfers	482	701
Transfers from stage 2 to stage 1 [Member] | Stage 1 [member] | Impairment [member] | Wholesale loans [member]
Loans and advances at amortised cost
Transfers	40	84
Transfers from stage 2 to stage 1 [Member] | Lifetime expected credit losses [member] | Stage 2 [member] | Gross exposure [member] | Home loans [member]
Loans and advances at amortised cost
Transfers	(4,618)	(8,000)
Transfers from stage 2 to stage 1 [Member] | Lifetime expected credit losses [member] | Stage 2 [member] | Gross exposure [member] | Credit cards, unsecured loans and other retail lending [member]
Loans and advances at amortised cost
Transfers	(3,080)	(4,522)
Transfers from stage 2 to stage 1 [Member] | Lifetime expected credit losses [member] | Stage 2 [member] | Gross exposure [member] | Wholesale loans [member]
Loans and advances at amortised cost
Transfers	(4,121)	(5,213)
Transfers from stage 2 to stage 1 [Member] | Lifetime expected credit losses [member] | Stage 2 [member] | Impairment [member] | Home loans [member]
Loans and advances at amortised cost
Transfers	(14)	(28)
Transfers from stage 2 to stage 1 [Member] | Lifetime expected credit losses [member] | Stage 2 [member] | Impairment [member] | Credit cards, unsecured loans and other retail lending [member]
Loans and advances at amortised cost
Transfers	(482)	(701)
Transfers from stage 2 to stage 1 [Member] | Lifetime expected credit losses [member] | Stage 2 [member] | Impairment [member] | Wholesale loans [member]
Loans and advances at amortised cost
Transfers	(40)	(84)
Transfers from stage 2 to stage 1 [Member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Gross exposure [member] | Home loans [member]
Loans and advances at amortised cost
Transfers	0	0
Transfers from stage 2 to stage 1 [Member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Gross exposure [member] | Credit cards, unsecured loans and other retail lending [member]
Loans and advances at amortised cost
Transfers	0	0
Transfers from stage 2 to stage 1 [Member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Gross exposure [member] | Wholesale loans [member]
Loans and advances at amortised cost
Transfers	0	0
Transfers from stage 2 to stage 1 [Member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Impairment [member] | Home loans [member]
Loans and advances at amortised cost
Transfers	0	0
Transfers from stage 2 to stage 1 [Member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Impairment [member] | Credit cards, unsecured loans and other retail lending [member]
Loans and advances at amortised cost
Transfers	0	0
Transfers from stage 2 to stage 1 [Member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Impairment [member] | Wholesale loans [member]
Loans and advances at amortised cost
Transfers	0	0
Transfers to stage 3 [Member] | Gross exposure [member] | Home loans [member]
Loans and advances at amortised cost
Transfers	0	0
Transfers to stage 3 [Member] | Gross exposure [member] | Credit cards, unsecured loans and other retail lending [member]
Loans and advances at amortised cost
Transfers	0	0
Transfers to stage 3 [Member] | Gross exposure [member] | Wholesale loans [member]
Loans and advances at amortised cost
Transfers	0	0
Transfers to stage 3 [Member] | Impairment [member] | Home loans [member]
Loans and advances at amortised cost
Transfers	0	0
Transfers to stage 3 [Member] | Impairment [member] | Credit cards, unsecured loans and other retail lending [member]
Loans and advances at amortised cost
Transfers	0	0
Transfers to stage 3 [Member] | Impairment [member] | Wholesale loans [member]
Loans and advances at amortised cost
Transfers	0	0
Transfers to stage 3 [Member] | Stage 1 [member] | Gross exposure [member] | Home loans [member]
Loans and advances at amortised cost
Transfers	(308)	(199)
Transfers to stage 3 [Member] | Stage 1 [member] | Gross exposure [member] | Credit cards, unsecured loans and other retail lending [member]
Loans and advances at amortised cost
Transfers	(712)	(857)
Transfers to stage 3 [Member] | Stage 1 [member] | Gross exposure [member] | Wholesale loans [member]
Loans and advances at amortised cost
Transfers	(1,137)	(501)
Transfers to stage 3 [Member] | Stage 1 [member] | Impairment [member] | Home loans [member]
Loans and advances at amortised cost
Transfers	0	0
Transfers to stage 3 [Member] | Stage 1 [member] | Impairment [member] | Credit cards, unsecured loans and other retail lending [member]
Loans and advances at amortised cost
Transfers	(25)	(21)
Transfers to stage 3 [Member] | Stage 1 [member] | Impairment [member] | Wholesale loans [member]
Loans and advances at amortised cost
Transfers	(4)	(2)
Transfers to stage 3 [Member] | Lifetime expected credit losses [member] | Stage 2 [member] | Gross exposure [member] | Home loans [member]
Loans and advances at amortised cost
Transfers	(420)	(510)
Transfers to stage 3 [Member] | Lifetime expected credit losses [member] | Stage 2 [member] | Gross exposure [member] | Credit cards, unsecured loans and other retail lending [member]
Loans and advances at amortised cost
Transfers	(1,162)	(1,264)
Transfers to stage 3 [Member] | Lifetime expected credit losses [member] | Stage 2 [member] | Gross exposure [member] | Wholesale loans [member]
Loans and advances at amortised cost
Transfers	(875)	(650)
Transfers to stage 3 [Member] | Lifetime expected credit losses [member] | Stage 2 [member] | Impairment [member] | Home loans [member]
Loans and advances at amortised cost
Transfers	(10)	(15)
Transfers to stage 3 [Member] | Lifetime expected credit losses [member] | Stage 2 [member] | Impairment [member] | Credit cards, unsecured loans and other retail lending [member]
Loans and advances at amortised cost
Transfers	(398)	(448)
Transfers to stage 3 [Member] | Lifetime expected credit losses [member] | Stage 2 [member] | Impairment [member] | Wholesale loans [member]
Loans and advances at amortised cost
Transfers	(58)	(19)
Transfers to stage 3 [Member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Gross exposure [member] | Home loans [member]
Loans and advances at amortised cost
Transfers	728	709
Transfers to stage 3 [Member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Gross exposure [member] | Credit cards, unsecured loans and other retail lending [member]
Loans and advances at amortised cost
Transfers	1,874	2,121
Transfers to stage 3 [Member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Gross exposure [member] | Wholesale loans [member]
Loans and advances at amortised cost
Transfers	2,012	1,151
Transfers to stage 3 [Member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Impairment [member] | Home loans [member]
Loans and advances at amortised cost
Transfers	10	15
Transfers to stage 3 [Member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Impairment [member] | Credit cards, unsecured loans and other retail lending [member]
Loans and advances at amortised cost
Transfers	423	469
Transfers to stage 3 [Member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Impairment [member] | Wholesale loans [member]
Loans and advances at amortised cost
Transfers	62	21
Transfers from stage 3 [Member] | Gross exposure [member] | Home loans [member]
Loans and advances at amortised cost
Transfers	0	0
Transfers from stage 3 [Member] | Gross exposure [member] | Credit cards, unsecured loans and other retail lending [member]
Loans and advances at amortised cost
Transfers	0	0
Transfers from stage 3 [Member] | Gross exposure [member] | Wholesale loans [member]
Loans and advances at amortised cost
Transfers	0	0
Transfers from stage 3 [Member] | Impairment [member] | Home loans [member]
Loans and advances at amortised cost
Transfers	0	0
Transfers from stage 3 [Member] | Impairment [member] | Credit cards, unsecured loans and other retail lending [member]
Loans and advances at amortised cost
Transfers	0	0
Transfers from stage 3 [Member] | Impairment [member] | Wholesale loans [member]
Loans and advances at amortised cost
Transfers	0	0
Transfers from stage 3 [Member] | Stage 1 [member] | Gross exposure [member] | Home loans [member]
Loans and advances at amortised cost
Transfers	47	43
Transfers from stage 3 [Member] | Stage 1 [member] | Gross exposure [member] | Credit cards, unsecured loans and other retail lending [member]
Loans and advances at amortised cost
Transfers	76	144
Transfers from stage 3 [Member] | Stage 1 [member] | Gross exposure [member] | Wholesale loans [member]
Loans and advances at amortised cost
Transfers	471	473
Transfers from stage 3 [Member] | Stage 1 [member] | Impairment [member] | Home loans [member]
Loans and advances at amortised cost
Transfers	1	2
Transfers from stage 3 [Member] | Stage 1 [member] | Impairment [member] | Credit cards, unsecured loans and other retail lending [member]
Loans and advances at amortised cost
Transfers	39	103
Transfers from stage 3 [Member] | Stage 1 [member] | Impairment [member] | Wholesale loans [member]
Loans and advances at amortised cost
Transfers	22	35
Transfers from stage 3 [Member] | Lifetime expected credit losses [member] | Stage 2 [member] | Gross exposure [member] | Home loans [member]
Loans and advances at amortised cost
Transfers	219	294
Transfers from stage 3 [Member] | Lifetime expected credit losses [member] | Stage 2 [member] | Gross exposure [member] | Credit cards, unsecured loans and other retail lending [member]
Loans and advances at amortised cost
Transfers	67	28
Transfers from stage 3 [Member] | Lifetime expected credit losses [member] | Stage 2 [member] | Gross exposure [member] | Wholesale loans [member]
Loans and advances at amortised cost
Transfers	247	205
Transfers from stage 3 [Member] | Lifetime expected credit losses [member] | Stage 2 [member] | Impairment [member] | Home loans [member]
Loans and advances at amortised cost
Transfers	2	3
Transfers from stage 3 [Member] | Lifetime expected credit losses [member] | Stage 2 [member] | Impairment [member] | Credit cards, unsecured loans and other retail lending [member]
Loans and advances at amortised cost
Transfers	12	14
Transfers from stage 3 [Member] | Lifetime expected credit losses [member] | Stage 2 [member] | Impairment [member] | Wholesale loans [member]
Loans and advances at amortised cost
Transfers	13	25
Transfers from stage 3 [Member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Gross exposure [member] | Home loans [member]
Loans and advances at amortised cost
Transfers	(266)	(337)
Transfers from stage 3 [Member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Gross exposure [member] | Credit cards, unsecured loans and other retail lending [member]
Loans and advances at amortised cost
Transfers	(143)	(172)
Transfers from stage 3 [Member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Gross exposure [member] | Wholesale loans [member]
Loans and advances at amortised cost
Transfers	(718)	(678)
Transfers from stage 3 [Member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Impairment [member] | Home loans [member]
Loans and advances at amortised cost
Transfers	(3)	(5)
Transfers from stage 3 [Member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Impairment [member] | Credit cards, unsecured loans and other retail lending [member]
Loans and advances at amortised cost
Transfers	(51)	(117)
Transfers from stage 3 [Member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Impairment [member] | Wholesale loans [member]
Loans and advances at amortised cost
Transfers	£ (35)	£ (60)

Other disclosures - Risk Mana_8

Other disclosures - Risk Management and Principal Risks - Reconciliation of ECL movement to impairment charge/(release) for the period (audited) (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Reconciliation of ECL movement to impairment (charge)/release for the period, Loans and advances at amortised cost
Recoveries and reimbursements	£ 399	£ 124	£ 195
Exchange and other adjustments	145	(96)
Impairment release on loan commitments and financial guarantees	(399)	(124)	(195)
Impairment charge on other financial assets	5,084	2,028	1,660
Credit impairment charges	(4,838)	(1,912)	(1,468)
Loan commitments and financial guarantee contracts [member]
Reconciliation of ECL movement to impairment (charge)/release for the period, Loans and advances at amortised cost
Impairment charge on other financial assets	776	71
Credit impairment charges	(776)	(71)	125
Loans and advances [member]
Reconciliation of ECL movement to impairment (charge)/release for the period, Loans and advances at amortised cost
ECL movement excluding assets derecognised due to disposals and write-off	4,163	2,053
Credit impairment charges	(4,685)	(1,904)	£ (1,465)
Home loans [member]
Reconciliation of ECL movement to impairment (charge)/release for the period, Loans and advances at amortised cost
ECL movement excluding assets derecognised due to disposals and write-off	128	(1)
Credit cards, unsecured loans and other retail lending [member]
Reconciliation of ECL movement to impairment (charge)/release for the period, Loans and advances at amortised cost
ECL movement excluding assets derecognised due to disposals and write-off	2,597	1,863
Wholesale loans [member]
Reconciliation of ECL movement to impairment (charge)/release for the period, Loans and advances at amortised cost
ECL movement excluding assets derecognised due to disposals and write-off	1,438	191
ECL | Loans and advances [member]
Reconciliation of ECL movement to impairment (charge)/release for the period, Loans and advances at amortised cost
ECL movement excluding assets derecognised due to disposals and write-off	232
Financial assets at amortised cost [member] | Loans and advances [member]
Reconciliation of ECL movement to impairment (charge)/release for the period, Loans and advances at amortised cost
Credit impairment charges	3,909	1,833
Financial assets at amortised cost [member] | ECL | Loans and advances [member]
Reconciliation of ECL movement to impairment (charge)/release for the period, Loans and advances at amortised cost
Recoveries and reimbursements	600
Other financial assets [member]
Reconciliation of ECL movement to impairment (charge)/release for the period, Loans and advances at amortised cost
Impairment charge on other financial assets	£ 153	£ 8

Other disclosures - Risk Mana_9

Other disclosures - Risk Management and Principal Risks - Gross exposure for loans and advances at amortised cost and Reconciliation of ECL movement to impairment charge/(release) for the period (audited) (Narrative) (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Recoveries and reimbursements	£ 399	£ 124	£ 195
Post write-off recoveries	35
Credit impairment charges and other provisions	4,838	1,912	1,468
Financial assets	(1,329,242)	(1,119,650)
Loan commitments and financial guarantee contracts [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Credit impairment charges and other provisions	776	71	(125)
ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	9,399	6,630
Loan commitments and financial guarantee contracts [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Credit impairment charges and other provisions	(776)
Financial assets		(340,938)
Loan commitments and financial guarantee contracts [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	344,096
Other financial assets subject to impairment [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Credit impairment charges and other provisions	(153)
Other financial assets subject to impairment [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	(180,300)	(149,300)	(129,900)
Other financial assets subject to impairment [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	165	24	12
Loans and advances [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Credit impairment charges and other provisions	4,685	1,904	1,465
Loans and advances [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	(5,000)
Home loans [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Changes to models used for calculation	0	0
Disposals	0	(787)
Gross Write-offs	22	26
Home loans [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Changes to models used for calculation	0	0
Disposals	0	(5)
Gross Write-offs	(22)	(26)
Credit cards, unsecured loans and other retail lending [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Changes to models used for calculation	0	0
Disposals	1,880	(777)
Gross Write-offs	1,609	1,695
Credit cards, unsecured loans and other retail lending [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Changes to models used for calculation	309	(101)
Disposals	172	(627)
Gross Write-offs	(1,609)	(1,695)
Wholesale loans [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	(7,551)	(6,434)
Wholesale loans [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Changes to models used for calculation	0	0
Disposals	2,404	(2,285)
Gross Write-offs	333	162
Wholesale loans [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Changes to models used for calculation	0	(28)
Disposals	0	0
Gross Write-offs	(333)	(162)
Stage 1 [member] | Other financial assets subject to impairment [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	(175,700)	(148,500)	(129,300)
Stage 1 [member] | Other financial assets subject to impairment [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	11	12	10
Stage 1 [member] | Home loans [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Changes to models used for calculation	0	0
Disposals	0	(723)
Gross Write-offs	0	0
Stage 1 [member] | Home loans [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Changes to models used for calculation	0	0
Disposals	0	(1)
Gross Write-offs	0	0
Stage 1 [member] | Credit cards, unsecured loans and other retail lending [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Changes to models used for calculation	0	0
Disposals	1,493	0
Gross Write-offs	0	0
Stage 1 [member] | Credit cards, unsecured loans and other retail lending [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Changes to models used for calculation	13	16
Disposals	8	0
Gross Write-offs	0	0
Stage 1 [member] | Wholesale loans [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Changes to models used for calculation	0	0
Disposals	2,394	(2,285)
Gross Write-offs	0	0
Stage 1 [member] | Wholesale loans [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Changes to models used for calculation	0	(9)
Disposals	0	0
Gross Write-offs	0	0
Lifetime expected credit losses [member] | Other financial assets subject to impairment [member] | Gross exposure [member] | Stage 2 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	(4,400)	(800)	(600)
Lifetime expected credit losses [member] | Other financial assets subject to impairment [member] | ECL | Stage 2 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	9	2	2
Lifetime expected credit losses [member] | Other assets [member] | Gross exposure [member] | Credit Impaired - Stage 3 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	(154)	(10)
Lifetime expected credit losses [member] | Other assets [member] | ECL | Credit Impaired - Stage 3 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	145	10
Lifetime expected credit losses [member] | Home loans [member] | Gross exposure [member] | Stage 2 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Changes to models used for calculation	0	0
Disposals	0	(62)
Gross Write-offs	0	0
Lifetime expected credit losses [member] | Home loans [member] | Gross exposure [member] | Credit Impaired - Stage 3 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Changes to models used for calculation	0	0
Disposals	0	(2)
Gross Write-offs	22	26
Lifetime expected credit losses [member] | Home loans [member] | ECL | Stage 2 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Changes to models used for calculation	0	0
Disposals	0	(4)
Gross Write-offs	0	0
Lifetime expected credit losses [member] | Home loans [member] | ECL | Credit Impaired - Stage 3 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Changes to models used for calculation	0	0
Disposals	0	0
Gross Write-offs	(22)	(26)
Lifetime expected credit losses [member] | Credit cards, unsecured loans and other retail lending [member] | Gross exposure [member] | Stage 2 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Changes to models used for calculation	0	0
Disposals	183	0
Gross Write-offs	0	0
Lifetime expected credit losses [member] | Credit cards, unsecured loans and other retail lending [member] | Gross exposure [member] | Credit Impaired - Stage 3 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Changes to models used for calculation	0	0
Disposals	204	(777)
Gross Write-offs	1,609	1,695
Lifetime expected credit losses [member] | Credit cards, unsecured loans and other retail lending [member] | ECL | Stage 2 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Changes to models used for calculation	296	(110)
Disposals	20	0
Gross Write-offs	0	0
Lifetime expected credit losses [member] | Credit cards, unsecured loans and other retail lending [member] | ECL | Credit Impaired - Stage 3 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Changes to models used for calculation	0	(7)
Disposals	144	(627)
Gross Write-offs	(1,609)	(1,695)
Lifetime expected credit losses [member] | Wholesale loans [member] | Gross exposure [member] | Stage 2 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Changes to models used for calculation	0	0
Disposals	10	0
Gross Write-offs	0	0
Lifetime expected credit losses [member] | Wholesale loans [member] | Gross exposure [member] | Credit Impaired - Stage 3 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Changes to models used for calculation	0	0
Disposals	0	0
Gross Write-offs	333	162
Lifetime expected credit losses [member] | Wholesale loans [member] | ECL | Stage 2 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Changes to models used for calculation	0	(19)
Disposals	0	0
Gross Write-offs	0	0
Lifetime expected credit losses [member] | Wholesale loans [member] | ECL | Credit Impaired - Stage 3 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Changes to models used for calculation	0	0
Disposals	0	0
Gross Write-offs	(333)	(162)
Financial assets at amortised cost [member] | Loans and advances at amortised cost, including off balance sheet loan commitments and financial guarantee contracts [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	(686,728)	(680,053)
Financial assets at amortised cost [member] | Loans and advances at amortised cost, including off balance sheet loan commitments and financial guarantee contracts [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	696,127	686,683
Financial assets at amortised cost [member] | Loans and advances at amortised cost, including off balance sheet loan commitments and financial guarantee contracts [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	9,399	6,630
Financial assets at amortised cost [member] | Loan commitments and financial guarantee contracts [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Credit impairment charges and other provisions		(71)
Financial assets at amortised cost [member] | Loan commitments and financial guarantee contracts [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	345,160	341,260
Financial assets at amortised cost [member] | Loan commitments and financial guarantee contracts [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	1,064	322
Financial assets at amortised cost [member] | Other financial assets subject to impairment [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Credit impairment charges and other provisions		(8)
Financial assets at amortised cost [member] | Loans and advances [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Credit impairment charges and other provisions	(3,909)	(1,833)
Financial assets	(342,632)	(339,115)
Financial assets at amortised cost [member] | Loans and advances [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Gross Write-offs	1,964	1,883	1,891
Post write-off recoveries	35	124	195
Net write-offs	1,929	1,759	£ 1,696
Financial assets	350,967	345,423
Financial assets at amortised cost [member] | Loans and advances [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Recoveries and reimbursements	600
Financial assets	8,335	6,308
Financial assets at amortised cost [member] | Home loans [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	(159,647)	(154,479)
Financial assets at amortised cost [member] | Home loans [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	160,185	154,911
Financial assets at amortised cost [member] | Home loans [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	538	432
Financial assets at amortised cost [member] | Credit cards, unsecured loans and other retail lending [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	(40,813)	(55,296)
Financial assets at amortised cost [member] | Credit cards, unsecured loans and other retail lending [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Disposals	1,900
Financial assets	46,513	60,180
Financial assets at amortised cost [member] | Credit cards, unsecured loans and other retail lending [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Changes to models used for calculation	309
Financial assets	5,700	4,884
Financial assets at amortised cost [member] | Barclays Partner Finance [Member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Disposals	1,700
Financial assets at amortised cost [member] | Wholesale loans [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	(142,172)	(129,340)
Financial assets at amortised cost [member] | Wholesale loans [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Disposals	2,400
Financial assets	144,269	130,332
Financial assets at amortised cost [member] | Wholesale loans [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	2,097	992
Financial assets at amortised cost [member] | Stage 1 [member] | Loans and advances at amortised cost, including off balance sheet loan commitments and financial guarantee contracts [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	580,903	620,406
Financial assets at amortised cost [member] | Stage 1 [member] | Loans and advances at amortised cost, including off balance sheet loan commitments and financial guarantee contracts [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	1,289	804
Financial assets at amortised cost [member] | Stage 1 [member] | Loan commitments and financial guarantee contracts [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	289,939	321,140
Financial assets at amortised cost [member] | Stage 1 [member] | Loan commitments and financial guarantee contracts [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	256	97
Financial assets at amortised cost [member] | Stage 1 [member] | Loans and advances [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	(289,931)	(298,559)
Financial assets at amortised cost [member] | Stage 1 [member] | Loans and advances [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	290,964	299,266
Financial assets at amortised cost [member] | Stage 1 [member] | Loans and advances [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	1,033	707
Financial assets at amortised cost [member] | Stage 1 [member] | Home loans [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	(138,606)	(135,691)
Financial assets at amortised cost [member] | Stage 1 [member] | Home loans [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	138,639	135,713
Financial assets at amortised cost [member] | Stage 1 [member] | Home loans [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	33	22
Financial assets at amortised cost [member] | Stage 1 [member] | Credit cards, unsecured loans and other retail lending [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	(32,341)	(45,470)
Financial assets at amortised cost [member] | Stage 1 [member] | Credit cards, unsecured loans and other retail lending [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	33,021	46,012
Financial assets at amortised cost [member] | Stage 1 [member] | Credit cards, unsecured loans and other retail lending [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	680	542
Financial assets at amortised cost [member] | Stage 1 [member] | Wholesale loans [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	(118,984)	(117,398)
Financial assets at amortised cost [member] | Stage 1 [member] | Wholesale loans [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	119,304	117,541
Financial assets at amortised cost [member] | Stage 1 [member] | Wholesale loans [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	320	143
Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Loans and advances at amortised cost, including off balance sheet loan commitments and financial guarantee contracts [member] | Gross exposure [member] | Stage 2 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	103,897	57,419
Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Loans and advances at amortised cost, including off balance sheet loan commitments and financial guarantee contracts [member] | Gross exposure [member] | Credit Impaired - Stage 3 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	11,327	8,858
Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Loans and advances at amortised cost, including off balance sheet loan commitments and financial guarantee contracts [member] | ECL | Stage 2 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	4,322	2,543
Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Loans and advances at amortised cost, including off balance sheet loan commitments and financial guarantee contracts [member] | ECL | Credit Impaired - Stage 3 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	3,788	3,283
Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Loan commitments and financial guarantee contracts [member] | Gross exposure [member] | Stage 2 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	52,891	19,185
Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Loan commitments and financial guarantee contracts [member] | Gross exposure [member] | Credit Impaired - Stage 3 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	2,330	935
Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Loan commitments and financial guarantee contracts [member] | ECL | Stage 2 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	758	170
Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Loan commitments and financial guarantee contracts [member] | ECL | Credit Impaired - Stage 3 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	50	55
Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Loans and advances [member] | Stage 2 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	(47,442)	(35,861)
Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Loans and advances [member] | Credit Impaired - Stage 3 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	(5,259)	(4,695)
Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Loans and advances [member] | Gross exposure [member] | Stage 2 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	51,006	38,234
Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Loans and advances [member] | Gross exposure [member] | Credit Impaired - Stage 3 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	8,997	7,923
Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Loans and advances [member] | ECL | Stage 2 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	3,564	2,373
Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Loans and advances [member] | ECL | Credit Impaired - Stage 3 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	3,738	3,228
Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Home loans [member] | Stage 2 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	(19,228)	(16,979)
Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Home loans [member] | Credit Impaired - Stage 3 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	(1,813)	(1,809)
Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Home loans [member] | Gross exposure [member] | Stage 2 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	19,312	17,043
Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Home loans [member] | Gross exposure [member] | Credit Impaired - Stage 3 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	2,234	2,155
Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Home loans [member] | ECL | Stage 2 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	84	64
Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Home loans [member] | ECL | Credit Impaired - Stage 3 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	421	346
Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Credit cards, unsecured loans and other retail lending [member] | Stage 2 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	(7,551)	(8,752)
Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Credit cards, unsecured loans and other retail lending [member] | Credit Impaired - Stage 3 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	(921)	(1,074)
Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Credit cards, unsecured loans and other retail lending [member] | Gross exposure [member] | Stage 2 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	10,320	10,759
Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Credit cards, unsecured loans and other retail lending [member] | Gross exposure [member] | Credit Impaired - Stage 3 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	3,172	3,409
Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Credit cards, unsecured loans and other retail lending [member] | ECL | Stage 2 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	2,769	2,007
Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Credit cards, unsecured loans and other retail lending [member] | ECL | Credit Impaired - Stage 3 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	2,251	2,335
Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Wholesale loans [member] | Stage 2 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	(20,663)	(10,130)
Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Wholesale loans [member] | Credit Impaired - Stage 3 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	(2,525)	(1,812)
Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Wholesale loans [member] | Gross exposure [member] | Stage 2 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	21,374	10,432
Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Wholesale loans [member] | Gross exposure [member] | Credit Impaired - Stage 3 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	3,591	2,359
Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Wholesale loans [member] | ECL | Stage 2 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	711	302
Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Wholesale loans [member] | ECL | Credit Impaired - Stage 3 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	1,066	547
Transfers from stage 2 to stage 1 [Member] | Loans and advances [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Transfers	2,000
Transfers from stage 2 to stage 1 [Member] | Home loans [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Transfers	0	0
Transfers from stage 2 to stage 1 [Member] | Home loans [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Transfers	0	0
Transfers from stage 2 to stage 1 [Member] | Credit cards, unsecured loans and other retail lending [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Transfers	0	0
Transfers from stage 2 to stage 1 [Member] | Credit cards, unsecured loans and other retail lending [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Transfers	0	0
Transfers from stage 2 to stage 1 [Member] | Wholesale loans [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Transfers	0	0
Transfers from stage 2 to stage 1 [Member] | Wholesale loans [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Transfers	0	0
Transfers from stage 2 to stage 1 [Member] | Stage 1 [member] | Home loans [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Transfers	4,618	8,000
Transfers from stage 2 to stage 1 [Member] | Stage 1 [member] | Home loans [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Transfers	14	28
Transfers from stage 2 to stage 1 [Member] | Stage 1 [member] | Credit cards, unsecured loans and other retail lending [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Transfers	3,080	4,522
Transfers from stage 2 to stage 1 [Member] | Stage 1 [member] | Credit cards, unsecured loans and other retail lending [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Transfers	482	701
Transfers from stage 2 to stage 1 [Member] | Stage 1 [member] | Wholesale loans [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Transfers	4,121	5,213
Transfers from stage 2 to stage 1 [Member] | Stage 1 [member] | Wholesale loans [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Transfers	40	84
Transfers from stage 2 to stage 1 [Member] | Lifetime expected credit losses [member] | Home loans [member] | Gross exposure [member] | Stage 2 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Transfers	(4,618)	(8,000)
Transfers from stage 2 to stage 1 [Member] | Lifetime expected credit losses [member] | Home loans [member] | Gross exposure [member] | Credit Impaired - Stage 3 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Transfers	0	0
Transfers from stage 2 to stage 1 [Member] | Lifetime expected credit losses [member] | Home loans [member] | ECL | Stage 2 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Transfers	(14)	(28)
Transfers from stage 2 to stage 1 [Member] | Lifetime expected credit losses [member] | Home loans [member] | ECL | Credit Impaired - Stage 3 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Transfers	0	0
Transfers from stage 2 to stage 1 [Member] | Lifetime expected credit losses [member] | Credit cards, unsecured loans and other retail lending [member] | Gross exposure [member] | Stage 2 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Transfers	(3,080)	(4,522)
Transfers from stage 2 to stage 1 [Member] | Lifetime expected credit losses [member] | Credit cards, unsecured loans and other retail lending [member] | Gross exposure [member] | Credit Impaired - Stage 3 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Transfers	0	0
Transfers from stage 2 to stage 1 [Member] | Lifetime expected credit losses [member] | Credit cards, unsecured loans and other retail lending [member] | ECL | Stage 2 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Transfers	(482)	(701)
Transfers from stage 2 to stage 1 [Member] | Lifetime expected credit losses [member] | Credit cards, unsecured loans and other retail lending [member] | ECL | Credit Impaired - Stage 3 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Transfers	0	0
Transfers from stage 2 to stage 1 [Member] | Lifetime expected credit losses [member] | Wholesale loans [member] | Gross exposure [member] | Stage 2 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Transfers	(4,121)	(5,213)
Transfers from stage 2 to stage 1 [Member] | Lifetime expected credit losses [member] | Wholesale loans [member] | Gross exposure [member] | Credit Impaired - Stage 3 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Transfers	0	0
Transfers from stage 2 to stage 1 [Member] | Lifetime expected credit losses [member] | Wholesale loans [member] | ECL | Stage 2 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Transfers	(40)	(84)
Transfers from stage 2 to stage 1 [Member] | Lifetime expected credit losses [member] | Wholesale loans [member] | ECL | Credit Impaired - Stage 3 [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Transfers	0	£ 0
Debt securities [member] | Wholesale loans [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Disposals	£ 200

Other disclosures - Risk Man_10

Other disclosures - Risk Management and Principal Risks - Gross exposure for loan commitment and financial guarantees (audited) (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Loan commitments and financial guarantee contracts
Limit management and final repayments	£ 0	£ 0	£ 0
Gross exposure [member] | Home loans [member] | Loan commitments and financial guarantee contracts [member]
Loan commitments and financial guarantee contracts
Opening/Beginning balance	10,046	7,507
Net transfers between stages	0	0
Business activity in the year	7,975	2,848
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(5,361)	(39)
Limit management and final repayments	(278)	(270)
Closing/Ending balance	12,382	10,046	7,507
Gross exposure [member] | Credit cards, unsecured loans and other retail lending [member] | Loan commitments and financial guarantee contracts [member]
Loan commitments and financial guarantee contracts
Opening/Beginning balance	132,247	133,894
Net transfers between stages	0	0
Business activity in the year	5,374	14,843
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	2,263	(3,197)
Limit management and final repayments	(13,167)	(13,293)
Closing/Ending balance	126,717	132,247	133,894
Gross exposure [member] | Wholesale loans [member] | Loan commitments and financial guarantee contracts [member]
Loan commitments and financial guarantee contracts
Opening/Beginning balance	198,967	191,398
Net transfers between stages	0	0
Business activity in the year	48,399	56,480
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	13,524	935
Limit management and final repayments	(54,829)	(49,846)
Closing/Ending balance	206,061	198,967	191,398
ECL | Home loans [member] | Loan commitments and financial guarantee contracts [member]
Loan commitments and financial guarantee contracts
Opening/Beginning balance	0	0
Net transfers between stages	0	0
Business activity in the year	0	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	0	0
Limit management and final repayments	0	0
Closing/Ending balance	0	0	0
ECL | Credit cards, unsecured loans and other retail lending [member] | Loan commitments and financial guarantee contracts [member]
Loan commitments and financial guarantee contracts
Opening/Beginning balance	120	126
Net transfers between stages	0	0
Business activity in the year	6	9
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	265	(3)
Limit management and final repayments	8	12
Closing/Ending balance	383	120	126
ECL | Wholesale loans [member] | Loan commitments and financial guarantee contracts [member]
Loan commitments and financial guarantee contracts
Opening/Beginning balance	202	145
Net transfers between stages	0	0
Business activity in the year	136	44
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	365	76
Limit management and final repayments	22	63
Closing/Ending balance	681	202	145
Stage 1 [member] | Gross exposure [member] | Home loans [member] | Loan commitments and financial guarantee contracts [member]
Loan commitments and financial guarantee contracts
Opening/Beginning balance	9,542	6,948
Net transfers between stages	(82)	(39)
Business activity in the year	7,975	2,848
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(5,332)	1
Limit management and final repayments	(242)	(216)
Closing/Ending balance	11,861	9,542	6,948
Stage 1 [member] | Gross exposure [member] | Credit cards, unsecured loans and other retail lending [member] | Loan commitments and financial guarantee contracts [member]
Loan commitments and financial guarantee contracts
Opening/Beginning balance	125,759	124,611
Net transfers between stages	(5,477)	117
Business activity in the year	5,214	14,619
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	1,298	(1,151)
Limit management and final repayments	(12,423)	(12,437)
Closing/Ending balance	114,371	125,759	124,611
Stage 1 [member] | Gross exposure [member] | Wholesale loans [member] | Loan commitments and financial guarantee contracts [member]
Loan commitments and financial guarantee contracts
Opening/Beginning balance	185,839	178,430
Net transfers between stages	(28,325)	(875)
Business activity in the year	42,917	53,685
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	13,637	(487)
Limit management and final repayments	(50,361)	(44,914)
Closing/Ending balance	163,707	185,839	178,430
Stage 1 [member] | ECL | Home loans [member] | Loan commitments and financial guarantee contracts [member]
Loan commitments and financial guarantee contracts
Opening/Beginning balance	0	0
Net transfers between stages	0	0
Business activity in the year	0	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	0	0
Limit management and final repayments	0	0
Closing/Ending balance	0	0	0
Stage 1 [member] | ECL | Credit cards, unsecured loans and other retail lending [member] | Loan commitments and financial guarantee contracts [member]
Loan commitments and financial guarantee contracts
Opening/Beginning balance	35	41
Net transfers between stages	43	44
Business activity in the year	2	2
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(22)	(48)
Limit management and final repayments	3	4
Closing/Ending balance	55	35	41
Stage 1 [member] | ECL | Wholesale loans [member] | Loan commitments and financial guarantee contracts [member]
Loan commitments and financial guarantee contracts
Opening/Beginning balance	62	58
Net transfers between stages	67	7
Business activity in the year	32	22
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	47	(1)
Limit management and final repayments	7	24
Closing/Ending balance	201	62	58
Lifetime expected credit losses [member] | Stage 2 [member] | Gross exposure [member] | Home loans [member] | Loan commitments and financial guarantee contracts [member]
Loan commitments and financial guarantee contracts
Opening/Beginning balance	500	546
Net transfers between stages	78	47
Business activity in the year	0	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(27)	(40)
Limit management and final repayments	(35)	(53)
Closing/Ending balance	516	500	546
Lifetime expected credit losses [member] | Stage 2 [member] | Gross exposure [member] | Credit cards, unsecured loans and other retail lending [member] | Loan commitments and financial guarantee contracts [member]
Loan commitments and financial guarantee contracts
Opening/Beginning balance	6,238	9,016
Net transfers between stages	4,725	(1,082)
Business activity in the year	158	218
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	1,636	(1,172)
Limit management and final repayments	(640)	(742)
Closing/Ending balance	12,117	6,238	9,016
Lifetime expected credit losses [member] | Stage 2 [member] | Gross exposure [member] | Wholesale loans [member] | Loan commitments and financial guarantee contracts [member]
Loan commitments and financial guarantee contracts
Opening/Beginning balance	12,447	12,564
Net transfers between stages	27,319	580
Business activity in the year	4,708	2,779
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(44)	1,190
Limit management and final repayments	(4,172)	(4,666)
Closing/Ending balance	40,258	12,447	12,564
Lifetime expected credit losses [member] | Stage 2 [member] | ECL | Home loans [member] | Loan commitments and financial guarantee contracts [member]
Loan commitments and financial guarantee contracts
Opening/Beginning balance	0	0
Net transfers between stages	0	0
Business activity in the year	0	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	0	0
Limit management and final repayments	0	0
Closing/Ending balance	0	0	0
Lifetime expected credit losses [member] | Stage 2 [member] | ECL | Credit cards, unsecured loans and other retail lending [member] | Loan commitments and financial guarantee contracts [member]
Loan commitments and financial guarantee contracts
Opening/Beginning balance	71	65
Net transfers between stages	(40)	(43)
Business activity in the year	3	1
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	272	54
Limit management and final repayments	1	6
Closing/Ending balance	305	71	65
Lifetime expected credit losses [member] | Stage 2 [member] | ECL | Wholesale loans [member] | Loan commitments and financial guarantee contracts [member]
Loan commitments and financial guarantee contracts
Opening/Beginning balance	99	85
Net transfers between stages	(72)	(8)
Business activity in the year	102	22
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	338	36
Limit management and final repayments	14	36
Closing/Ending balance	453	99	85
Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Gross exposure [member] | Home loans [member] | Loan commitments and financial guarantee contracts [member]
Loan commitments and financial guarantee contracts
Opening/Beginning balance	4	13
Net transfers between stages	4	(8)
Business activity in the year	0	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(2)	0
Limit management and final repayments	(1)	(1)
Closing/Ending balance	5	4	13
Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Gross exposure [member] | Credit cards, unsecured loans and other retail lending [member] | Loan commitments and financial guarantee contracts [member]
Loan commitments and financial guarantee contracts
Opening/Beginning balance	250	267
Net transfers between stages	752	965
Business activity in the year	2	6
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(671)	(874)
Limit management and final repayments	(104)	(114)
Closing/Ending balance	229	250	267
Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Gross exposure [member] | Wholesale loans [member] | Loan commitments and financial guarantee contracts [member]
Loan commitments and financial guarantee contracts
Opening/Beginning balance	681	404
Net transfers between stages	1,006	295
Business activity in the year	774	16
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(69)	232
Limit management and final repayments	(296)	(266)
Closing/Ending balance	2,096	681	404
Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | ECL | Home loans [member] | Loan commitments and financial guarantee contracts [member]
Loan commitments and financial guarantee contracts
Opening/Beginning balance	0	0
Net transfers between stages	0	0
Business activity in the year	0	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	0	0
Limit management and final repayments	0	0
Closing/Ending balance	0	0	0
Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | ECL | Credit cards, unsecured loans and other retail lending [member] | Loan commitments and financial guarantee contracts [member]
Loan commitments and financial guarantee contracts
Opening/Beginning balance	14	20
Net transfers between stages	(3)	(1)
Business activity in the year	1	6
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	15	(9)
Limit management and final repayments	4	2
Closing/Ending balance	23	14	20
Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | ECL | Wholesale loans [member] | Loan commitments and financial guarantee contracts [member]
Loan commitments and financial guarantee contracts
Opening/Beginning balance	41	2
Net transfers between stages	5	1
Business activity in the year	2	0
Net drawdowns, repayments, net re-measurement and movement due to exposure and risk parameter changes	(20)	41
Limit management and final repayments	1	3
Closing/Ending balance	£ 27	£ 41	£ 2

Other disclosures - Risk Man_11

Other disclosures - Risk Management and Principal Risks - Management adjustments to models for impairment (audited) (Details) - Portfolios with management adjustments over threshold [member] - GBP (£) £ in Millions	Dec. 31, 2020	Dec. 31, 2019
Loans and advances [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Management adjustments to impairment allowances, including forbearance	£ 1,388	£ 340
Proportion of total impairment allowances	14.80%	5.10%
Home loans [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Management adjustments to impairment allowances, including forbearance	£ (131)	£ (57)
Proportion of total impairment allowances	24.30%	13.20%
Credit cards, unsecured loans and other retail lending [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Management adjustments to impairment allowances, including forbearance	£ (1,234)	£ (308)
Proportion of total impairment allowances	20.30%	6.20%
Wholesale loans [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Management adjustments to impairment allowances, including forbearance	£ (23)	£ 25
Proportion of total impairment allowances	0.80%	(2.10%)

Other disclosures - Risk Man_12

Other disclosures - Risk Management and Principal Risks - Management adjustments to models for impairment charges (audited) (Details) - Credit risk [member] £ in Millions	Dec. 31, 2020GBP (£)
Loans and advances [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Impairment allowance	£ 9,399
Loans and advances [member] | Modelled impairment allowance [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Impairment allowance	8,011
Loans and advances [member] | Economic uncertainty adjustments [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Impairment allowance	2,067
Loans and advances [member] | Other adjustments [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Impairment allowance	(679)
Home loans [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Impairment allowance	538
Home loans [member] | Modelled impairment allowance [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Impairment allowance	407
Home loans [member] | Economic uncertainty adjustments [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Impairment allowance	21
Home loans [member] | Other adjustments [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Impairment allowance	110
Credit cards, unsecured loans and other retail lending [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Impairment allowance	6,083
Credit cards, unsecured loans and other retail lending [member] | Modelled impairment allowance [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Impairment allowance	4,849
Credit cards, unsecured loans and other retail lending [member] | Economic uncertainty adjustments [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Impairment allowance	1,625
Credit cards, unsecured loans and other retail lending [member] | Other adjustments [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Impairment allowance	(391)
Wholesale loans [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Impairment allowance	2,778
Wholesale loans [member] | Modelled impairment allowance [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Impairment allowance	2,755
Wholesale loans [member] | Economic uncertainty adjustments [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Impairment allowance	421
Wholesale loans [member] | Other adjustments [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Impairment allowance	£ (398)

Other disclosures - Risk Man_13

Other disclosures - Risk Management and Principal Risks - Management adjustments to models for impairment (audited) (Narrative) (Details) - GBP (£) £ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ (1,329,242)	£ (1,119,650)
Loans and advances [member] | Portfolios with management adjustments over threshold [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Management adjustments to impairment allowances, including forbearance	1,388	340
Loans and advances [member] | Credit risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Impairment allowance	9,399
Loans and advances [member] | Financial assets at amortised cost [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ (342,632)	£ (339,115)
Observed 30 day arrears rates	(2.40%)	(1.80%)
Loans and advances [member] | Stage 1 [member] | Financial assets at amortised cost [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ (289,931)	£ (298,559)
Home loans [member] | Portfolios with management adjustments over threshold [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Management adjustments to impairment allowances, including forbearance	(131)	(57)
Home loans [member] | Credit risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Impairment allowance	538
Home loans [member] | Financial assets at amortised cost [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(159,647)	(154,479)
Home loans [member] | Stage 1 [member] | Financial assets at amortised cost [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(138,606)	(135,691)
Credit cards, unsecured loans and other retail lending [member] | Portfolios with management adjustments over threshold [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Management adjustments to impairment allowances, including forbearance	(1,234)	(308)
Credit cards, unsecured loans and other retail lending [member] | Credit risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Impairment allowance	6,083
Credit cards, unsecured loans and other retail lending [member] | Financial assets at amortised cost [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(40,813)	(55,296)
Credit cards, unsecured loans and other retail lending [member] | Stage 1 [member] | Financial assets at amortised cost [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(32,341)	(45,470)
Wholesale loans [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(7,551)	(6,434)
Wholesale loans [member] | Portfolios with management adjustments over threshold [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Management adjustments to impairment allowances, including forbearance	(23)	25
Wholesale loans [member] | Credit risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Impairment allowance	2,778
Wholesale loans [member] | Financial assets at amortised cost [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(142,172)	(129,340)
Wholesale loans [member] | Stage 1 [member] | Financial assets at amortised cost [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(118,984)	(117,398)
ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	9,399	6,630
ECL | Loans and advances [member] | Financial assets at amortised cost [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	8,335	6,308
ECL | Loans and advances [member] | Stage 1 [member] | Financial assets at amortised cost [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	1,033	707
ECL | Home loans [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Impairment allowance	538	432	£ 464
ECL | Home loans [member] | Credit risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	350	315
ECL | Home loans [member] | Financial assets at amortised cost [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	538	432
ECL | Home loans [member] | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Impairment allowance	33	22	31
ECL | Home loans [member] | Stage 1 [member] | Credit risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	6	6
ECL | Home loans [member] | Stage 1 [member] | Financial assets at amortised cost [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	33	22
ECL | Credit cards, unsecured loans and other retail lending [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Impairment allowance	5,700	4,884	5,343
ECL | Credit cards, unsecured loans and other retail lending [member] | Credit risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	4,602	4,547
ECL | Credit cards, unsecured loans and other retail lending [member] | Financial assets at amortised cost [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	5,700	4,884
ECL | Credit cards, unsecured loans and other retail lending [member] | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Impairment allowance	680	542	528
ECL | Credit cards, unsecured loans and other retail lending [member] | Stage 1 [member] | Credit risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	392	505
ECL | Credit cards, unsecured loans and other retail lending [member] | Stage 1 [member] | Financial assets at amortised cost [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	680	542
ECL | Wholesale loans [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Impairment allowance	2,097	992	963
ECL | Wholesale loans [member] | Credit risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	1,818	741
ECL | Wholesale loans [member] | Financial assets at amortised cost [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	2,097	992
ECL | Wholesale loans [member] | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Impairment allowance	320	143	£ 129
ECL | Wholesale loans [member] | Stage 1 [member] | Credit risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	262	209
ECL | Wholesale loans [member] | Stage 1 [member] | Financial assets at amortised cost [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	320	143
Modelled impairment allowance [member] | Loans and advances [member] | Credit risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Impairment allowance	8,011
Modelled impairment allowance [member] | Home loans [member] | Credit risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Impairment allowance	407
Modelled impairment allowance [member] | Credit cards, unsecured loans and other retail lending [member] | Credit risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Impairment allowance	4,849
Modelled impairment allowance [member] | Wholesale loans [member] | Credit risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Impairment allowance	2,755
Total model ECL [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	6,770	5,603
ECL from individually assessed impairments [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	902	419
ECL from non-modelled and other management adjustments [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets		268
ECL from non-modelled and other management adjustments [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	1,727	£ 608
ECL from non-modelled exposures [Member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	300
Economic uncertainty adjustments [member] | Loans and advances [member] | Credit risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Impairment allowance	2,067
Economic uncertainty adjustments [member] | Home loans [member] | Credit risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Impairment allowance	21
Economic uncertainty adjustments [member] | Credit cards, unsecured loans and other retail lending [member] | Credit risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Impairment allowance	1,625
Economic uncertainty adjustments [member] | Wholesale loans [member] | Credit risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Impairment allowance	£ 421
Economic uncertainty adjustments [member] | ECL | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Observed 30 day arrears rates	(2.50%)	(2.70%)
Economic uncertainty adjustments [member] | ECL | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Observed 30 day arrears rates	(1.70%)	(1.70%)
Economic uncertainty adjustments [member] | ECL | UK | Portfolios with management adjustments over threshold [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Management adjustments to impairment allowances, including forbearance	£ 150
Economic uncertainty adjustments [member] | ECL | Loans and advances [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Government guarantees	100
Economic uncertainty adjustments [member] | ECL | Loans and advances [member] | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Impairment allowance	300
Economic uncertainty adjustments [member] | ECL | Loans and advances [member] | Expected Worst Point
Disclosure of nature and extent of risks arising from financial instruments [line items]
Impairment allowance	1,200
Economic uncertainty adjustments [member] | ECL | Loans and advances [member] | Probability of default [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Impairment allowance	700
Other adjustments [member] | Loans and advances [member] | Credit risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Impairment allowance	(679)
Other adjustments [member] | Home loans [member] | Credit risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Impairment allowance	110
Other adjustments [member] | Credit cards, unsecured loans and other retail lending [member] | Credit risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Impairment allowance	(391)
Other adjustments [member] | Wholesale loans [member] | Credit risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Impairment allowance	(398)
Other adjustments [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets		£ 608
Post-Model Adjustment [Member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	1,400
Post-Model Adjustment [Member] | ECL | Portfolios with management adjustments over threshold [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Management adjustments to impairment allowances, including forbearance	£ 210

Other disclosures - Risk Man_14

Other disclosures - Risk Management and Principal Risks - Measurement uncertainty and sensitivity analysis - Scenario probability weighting and Macroeconomic variables used in calculation of ECL (audited) (Details)	Dec. 31, 2020	Dec. 31, 2019
Upside 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(24.20%)	(23.10%)
Upside 1 [member] | GDP [member] | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(8.80%)	(11.70%)
Upside 1 [member] | GDP [member] | UK | Up to one year [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(9.30%)	(2.20%)
Upside 1 [member] | GDP [member] | UK | One to two years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(3.90%)	(2.80%)
Upside 1 [member] | GDP [member] | UK | Two to three years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(3.40%)	(2.50%)
Upside 1 [member] | GDP [member] | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(12.80%)	(14.90%)
Upside 1 [member] | GDP [member] | US | Up to one year [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(5.50%)	(2.80%)
Upside 1 [member] | GDP [member] | US | One to two years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(4.00%)	(3.30%)
Upside 1 [member] | GDP [member] | US | Two to three years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(3.70%)	(2.90%)
Upside 1 [member] | GDP [member] | Expected Worst Point | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(3.50%)	(0.60%)
Upside 1 [member] | GDP [member] | Expected Worst Point | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(2.10%)	(0.80%)
Upside 1 [member] | GDP [member] | 5-year averages | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(1.60%)	(2.20%)
Upside 1 [member] | GDP [member] | 5-year averages | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(2.40%)	(2.90%)
Upside 1 [member] | Unemployment [member] | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(4.00%)	(3.80%)
Upside 1 [member] | Unemployment [member] | UK | Up to one year [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(6.40%)	(3.90%)
Upside 1 [member] | Unemployment [member] | UK | One to two years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(6.00%)	(3.80%)
Upside 1 [member] | Unemployment [member] | UK | Two to three years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(5.20%)	(3.90%)
Upside 1 [member] | Unemployment [member] | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(3.80%)	(3.50%)
Upside 1 [member] | Unemployment [member] | US | Up to one year [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(6.00%)	(3.50%)
Upside 1 [member] | Unemployment [member] | US | One to two years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(4.80%)	(3.60%)
Upside 1 [member] | Unemployment [member] | US | Two to three years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(4.60%)	(3.70%)
Upside 1 [member] | Unemployment [member] | Expected Worst Point | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(7.40%)	(4.00%)
Upside 1 [member] | Unemployment [member] | Expected Worst Point | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(6.70%)	(3.70%)
Upside 1 [member] | Unemployment [member] | 5-year averages | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(5.30%)	(3.90%)
Upside 1 [member] | Unemployment [member] | 5-year averages | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(5.70%)	(3.70%)
Upside 1 [member] | HPI [member] | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(30.80%)	(28.80%)
Upside 1 [member] | HPI [member] | UK | Up to one year [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(4.60%)	(5.00%)
Upside 1 [member] | HPI [member] | UK | One to two years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(6.10%)	(7.00%)
Upside 1 [member] | HPI [member] | UK | Two to three years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(6.10%)	(6.80%)
Upside 1 [member] | HPI [member] | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(30.90%)	(23.70%)
Upside 1 [member] | HPI [member] | US | Up to one year [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(6.80%)	(5.10%)
Upside 1 [member] | HPI [member] | US | One to two years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(6.70%)	(4.70%)
Upside 1 [member] | HPI [member] | US | Two to three years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(6.30%)	(4.40%)
Upside 1 [member] | HPI [member] | Expected Worst Point | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.80%)	(0.70%)
Upside 1 [member] | HPI [member] | Expected Worst Point | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(1.40%)	(1.40%)
Upside 1 [member] | HPI [member] | 5-year averages | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(5.50%)	(5.20%)
Upside 1 [member] | HPI [member] | 5-year averages | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(5.50%)	(4.30%)
Upside 1 [member] | Bank Rate [Member] | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.10%)	(0.50%)
Upside 1 [member] | Bank Rate [Member] | UK | Up to one year [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.10%)	(0.60%)
Upside 1 [member] | Bank Rate [Member] | UK | One to two years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.10%)	(0.50%)
Upside 1 [member] | Bank Rate [Member] | UK | Two to three years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.30%)	(0.50%)
Upside 1 [member] | Bank Rate [Member] | Expected Worst Point | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.10%)	(0.50%)
Upside 1 [member] | Bank Rate [Member] | 5-year averages | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.20%)	(0.60%)
Upside 1 [member] | Federal funds rate [member] | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.10%)	(1.50%)
Upside 1 [member] | Federal funds rate [member] | US | Up to one year [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.30%)	(1.70%)
Upside 1 [member] | Federal funds rate [member] | US | One to two years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.30%)	(1.50%)
Upside 1 [member] | Federal funds rate [member] | US | Two to three years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.50%)	(1.50%)
Upside 1 [member] | Federal funds rate [member] | Expected Worst Point | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.30%)	(1.50%)
Upside 1 [member] | Federal funds rate [member] | 5-year averages | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.50%)	(1.70%)
Upside 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(20.20%)	(10.10%)
Upside 2 [member] | GDP [member] | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(14.20%)	(15.40%)
Upside 2 [member] | GDP [member] | UK | Up to one year [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(12.20%)	(3.00%)
Upside 2 [member] | GDP [member] | UK | One to two years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(5.30%)	(4.00%)
Upside 2 [member] | GDP [member] | UK | Two to three years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(3.90%)	(3.40%)
Upside 2 [member] | GDP [member] | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(15.70%)	(17.90%)
Upside 2 [member] | GDP [member] | US | Up to one year [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(7.10%)	(3.40%)
Upside 2 [member] | GDP [member] | US | One to two years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(4.60%)	(4.20%)
Upside 2 [member] | GDP [member] | US | Two to three years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(4.00%)	(3.60%)
Upside 2 [member] | GDP [member] | Expected Worst Point | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(5.00%)	(0.90%)
Upside 2 [member] | GDP [member] | Expected Worst Point | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(3.40%)	(1.00%)
Upside 2 [member] | GDP [member] | 5-year averages | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(2.50%)	(2.90%)
Upside 2 [member] | GDP [member] | 5-year averages | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(2.90%)	(3.40%)
Upside 2 [member] | Unemployment [member] | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(4.00%)	(3.40%)
Upside 2 [member] | Unemployment [member] | UK | Up to one year [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(6.20%)	(3.70%)
Upside 2 [member] | Unemployment [member] | UK | One to two years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(5.50%)	(3.40%)
Upside 2 [member] | Unemployment [member] | UK | Two to three years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(4.80%)	(3.50%)
Upside 2 [member] | Unemployment [member] | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(3.80%)	(3.00%)
Upside 2 [member] | Unemployment [member] | US | Up to one year [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(5.50%)	(3.30%)
Upside 2 [member] | Unemployment [member] | US | One to two years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(4.30%)	(3.00%)
Upside 2 [member] | Unemployment [member] | US | Two to three years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(4.10%)	(3.00%)
Upside 2 [member] | Unemployment [member] | Expected Worst Point | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(7.40%)	(3.90%)
Upside 2 [member] | Unemployment [member] | Expected Worst Point | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(6.10%)	(3.50%)
Upside 2 [member] | Unemployment [member] | 5-year averages | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(5.00%)	(3.60%)
Upside 2 [member] | Unemployment [member] | 5-year averages | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(5.30%)	(3.20%)
Upside 2 [member] | HPI [member] | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(48.20%)	(41.10%)
Upside 2 [member] | HPI [member] | UK | Up to one year [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(6.60%)	(6.80%)
Upside 2 [member] | HPI [member] | UK | One to two years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(10.40%)	(10.80%)
Upside 2 [member] | HPI [member] | UK | Two to three years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(10.80%)	(9.90%)
Upside 2 [member] | HPI [member] | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(42.20%)	(35.80%)
Upside 2 [member] | HPI [member] | US | Up to one year [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(8.80%)	(7.40%)
Upside 2 [member] | HPI [member] | US | One to two years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(9.10%)	(7.60%)
Upside 2 [member] | HPI [member] | US | Two to three years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(8.90%)	(7.20%)
Upside 2 [member] | HPI [member] | Expected Worst Point | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(1.10%)	(1.00%)
Upside 2 [member] | HPI [member] | Expected Worst Point | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(1.70%)	(1.60%)
Upside 2 [member] | HPI [member] | 5-year averages | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(8.20%)	(7.10%)
Upside 2 [member] | HPI [member] | 5-year averages | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(7.30%)	(6.30%)
Upside 2 [member] | Bank Rate [Member] | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.10%)	(0.50%)
Upside 2 [member] | Bank Rate [Member] | UK | Up to one year [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.10%)	(0.60%)
Upside 2 [member] | Bank Rate [Member] | UK | One to two years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.30%)	(0.50%)
Upside 2 [member] | Bank Rate [Member] | UK | Two to three years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.30%)	(0.50%)
Upside 2 [member] | Bank Rate [Member] | Expected Worst Point | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.10%)	(0.50%)
Upside 2 [member] | Bank Rate [Member] | 5-year averages | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.30%)	(0.60%)
Upside 2 [member] | Federal funds rate [member] | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.10%)	(1.50%)
Upside 2 [member] | Federal funds rate [member] | US | Up to one year [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.30%)	(1.70%)
Upside 2 [member] | Federal funds rate [member] | US | One to two years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.40%)	(1.50%)
Upside 2 [member] | Federal funds rate [member] | US | Two to three years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.60%)	(1.50%)
Upside 2 [member] | Federal funds rate [member] | Expected Worst Point | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.30%)	(1.50%)
Upside 2 [member] | Federal funds rate [member] | 5-year averages | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.50%)	(1.70%)
Baseline [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(24.70%)	(40.80%)
Baseline [member] | GDP [member] | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.70%)	(1.50%)
Baseline [member] | GDP [member] | UK | Up to one year [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(6.30%)	(1.30%)
Baseline [member] | GDP [member] | UK | One to two years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(3.30%)	(1.50%)
Baseline [member] | GDP [member] | UK | Two to three years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(2.60%)	(1.60%)
Baseline [member] | GDP [member] | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(1.60%)	(2.10%)
Baseline [member] | GDP [member] | US | Up to one year [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(3.90%)	(2.10%)
Baseline [member] | GDP [member] | US | One to two years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(3.10%)	(1.90%)
Baseline [member] | GDP [member] | US | Two to three years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(2.90%)	(1.90%)
Baseline [member] | GDP [member] | Expected Worst Point | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(1.20%)	(0.30%)
Baseline [member] | GDP [member] | Expected Worst Point | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(1.00%)	(0.50%)
Baseline [member] | GDP [member] | 5-year averages | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.70%)	(1.50%)
Baseline [member] | GDP [member] | 5-year averages | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(1.60%)	(2.10%)
Baseline [member] | Unemployment [member] | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(5.70%)	(4.10%)
Baseline [member] | Unemployment [member] | UK | Up to one year [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(6.70%)	(4.10%)
Baseline [member] | Unemployment [member] | UK | One to two years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(6.40%)	(4.20%)
Baseline [member] | Unemployment [member] | UK | Two to three years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(5.80%)	(4.20%)
Baseline [member] | Unemployment [member] | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(6.40%)	(3.90%)
Baseline [member] | Unemployment [member] | US | Up to one year [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(6.90%)	(3.60%)
Baseline [member] | Unemployment [member] | US | One to two years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(5.70%)	(3.90%)
Baseline [member] | Unemployment [member] | US | Two to three years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(5.60%)	(4.00%)
Baseline [member] | Unemployment [member] | Expected Worst Point | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(7.40%)	(4.20%)
Baseline [member] | Unemployment [member] | Expected Worst Point | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(7.50%)	(4.00%)
Baseline [member] | Unemployment [member] | 5-year averages | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(5.70%)	(4.10%)
Baseline [member] | Unemployment [member] | 5-year averages | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(6.40%)	(3.90%)
Baseline [member] | HPI [member] | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(3.60%)	(2.80%)
Baseline [member] | HPI [member] | UK | Up to one year [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(2.40%)	(1.90%)
Baseline [member] | HPI [member] | UK | One to two years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(2.30%)	(3.10%)
Baseline [member] | HPI [member] | UK | Two to three years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(5.00%)	(3.60%)
Baseline [member] | HPI [member] | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(3.80%)	(3.20%)
Baseline [member] | HPI [member] | US | Up to one year [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(2.80%)	(3.40%)
Baseline [member] | HPI [member] | US | One to two years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(4.70%)	(2.90%)
Baseline [member] | HPI [member] | US | Two to three years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(4.70%)	(2.80%)
Baseline [member] | HPI [member] | Expected Worst Point | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.60%)	(0.30%)
Baseline [member] | HPI [member] | Expected Worst Point | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.70%)	(1.00%)
Baseline [member] | HPI [member] | 5-year averages | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(3.60%)	(2.80%)
Baseline [member] | HPI [member] | 5-year averages | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(3.80%)	(3.20%)
Baseline [member] | Bank Rate [Member] | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	0.00%	(0.70%)
Baseline [member] | Bank Rate [Member] | UK | Up to one year [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	0.00%	(0.60%)
Baseline [member] | Bank Rate [Member] | UK | One to two years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.10%)	(0.50%)
Baseline [member] | Bank Rate [Member] | UK | Two to three years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	0.00%	(0.80%)
Baseline [member] | Bank Rate [Member] | Expected Worst Point | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.10%)	(0.50%)
Baseline [member] | Bank Rate [Member] | 5-year averages | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	0.00%	(0.70%)
Baseline [member] | Federal funds rate [member] | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.30%)	(1.80%)
Baseline [member] | Federal funds rate [member] | US | Up to one year [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.30%)	(1.70%)
Baseline [member] | Federal funds rate [member] | US | One to two years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.30%)	(1.50%)
Baseline [member] | Federal funds rate [member] | US | Two to three years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.30%)	(1.70%)
Baseline [member] | Federal funds rate [member] | Expected Worst Point | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.30%)	(1.50%)
Baseline [member] | Federal funds rate [member] | 5-year averages | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.30%)	(1.80%)
Downside 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(15.50%)	(22.70%)
Downside 1 [member] | GDP [member] | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(22.10%)	(0.20%)
Downside 1 [member] | GDP [member] | UK | Up to one year [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.10%)	(0.60%)
Downside 1 [member] | GDP [member] | UK | One to two years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(6.60%)	(0.30%)
Downside 1 [member] | GDP [member] | UK | Two to three years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(3.20%)	(0.60%)
Downside 1 [member] | GDP [member] | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(10.60%)	(0.50%)
Downside 1 [member] | GDP [member] | US | Up to one year [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.40%)	(1.20%)
Downside 1 [member] | GDP [member] | US | One to two years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(3.60%)	(0.40%)
Downside 1 [member] | GDP [member] | US | Two to three years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(2.30%)	(0.80%)
Downside 1 [member] | GDP [member] | Expected Worst Point | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(7.00%)	(0.10%)
Downside 1 [member] | GDP [member] | Expected Worst Point | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(3.00%)	(0.20%)
Downside 1 [member] | GDP [member] | 5-year averages | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.10%)	(0.80%)
Downside 1 [member] | GDP [member] | 5-year averages | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.80%)	(1.30%)
Downside 1 [member] | Unemployment [member] | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(8.40%)	(5.80%)
Downside 1 [member] | Unemployment [member] | UK | Up to one year [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(7.30%)	(4.70%)
Downside 1 [member] | Unemployment [member] | UK | One to two years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(8.00%)	(5.70%)
Downside 1 [member] | Unemployment [member] | UK | Two to three years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(6.90%)	(5.70%)
Downside 1 [member] | Unemployment [member] | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(13.00%)	(5.40%)
Downside 1 [member] | Unemployment [member] | US | Up to one year [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(11.00%)	(4.00%)
Downside 1 [member] | Unemployment [member] | US | One to two years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(8.90%)	(5.10%)
Downside 1 [member] | Unemployment [member] | US | Two to three years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(6.90%)	(5.30%)
Downside 1 [member] | Unemployment [member] | Expected Worst Point | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(8.40%)	(5.80%)
Downside 1 [member] | Unemployment [member] | Expected Worst Point | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(11.50%)	(5.40%)
Downside 1 [member] | Unemployment [member] | 5-year averages | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(6.50%)	(5.10%)
Downside 1 [member] | Unemployment [member] | 5-year averages | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(8.30%)	(4.70%)
Downside 1 [member] | HPI [member] | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(4.50%)	(6.30%)
Downside 1 [member] | HPI [member] | UK | Up to one year [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(6.70%)	(2.60%)
Downside 1 [member] | HPI [member] | UK | One to two years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(3.50%)	(4.10%)
Downside 1 [member] | HPI [member] | UK | Two to three years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(1.70%)	(1.70%)
Downside 1 [member] | HPI [member] | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(3.70%)	(0.30%)
Downside 1 [member] | HPI [member] | US | Up to one year [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(5.90%)	(1.20%)
Downside 1 [member] | HPI [member] | US | One to two years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(1.80%)	(0.50%)
Downside 1 [member] | HPI [member] | US | Two to three years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(2.60%)	(0.80%)
Downside 1 [member] | HPI [member] | Expected Worst Point | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(10.00%)	(8.20%)
Downside 1 [member] | HPI [member] | Expected Worst Point | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(5.90%)	(0.50%)
Downside 1 [member] | HPI [member] | 5-year averages | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.20%)	(1.10%)
Downside 1 [member] | HPI [member] | 5-year averages | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.80%)	(1.60%)
Downside 1 [member] | Bank Rate [Member] | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.60%)	(2.80%)
Downside 1 [member] | Bank Rate [Member] | UK | Up to one year [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.10%)	(1.70%)
Downside 1 [member] | Bank Rate [Member] | UK | One to two years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.10%)	(2.80%)
Downside 1 [member] | Bank Rate [Member] | UK | Two to three years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	0.00%	(2.80%)
Downside 1 [member] | Bank Rate [Member] | Expected Worst Point | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.10%)	(0.80%)
Downside 1 [member] | Bank Rate [Member] | 5-year averages | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	0.00%	(2.10%)
Downside 1 [member] | Federal funds rate [member] | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(1.30%)	(3.00%)
Downside 1 [member] | Federal funds rate [member] | US | Up to one year [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.30%)	(2.60%)
Downside 1 [member] | Federal funds rate [member] | US | One to two years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.30%)	(3.00%)
Downside 1 [member] | Federal funds rate [member] | US | Two to three years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.30%)	(3.00%)
Downside 1 [member] | Federal funds rate [member] | Expected Worst Point | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.30%)	(2.00%)
Downside 1 [member] | Federal funds rate [member] | 5-year averages | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.30%)	(2.80%)
Downside 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(15.40%)	(3.30%)
Downside 2 [member] | GDP [member] | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(22.10%)	(4.60%)
Downside 2 [member] | GDP [member] | UK | Up to one year [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(3.90%)	(1.30%)
Downside 2 [member] | GDP [member] | UK | One to two years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(6.50%)	(1.50%)
Downside 2 [member] | GDP [member] | UK | Two to three years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(2.60%)	(1.60%)
Downside 2 [member] | GDP [member] | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(10.60%)	(3.00%)
Downside 2 [member] | GDP [member] | US | Up to one year [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(2.40%)	(2.10%)
Downside 2 [member] | GDP [member] | US | One to two years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(3.60%)	(1.90%)
Downside 2 [member] | GDP [member] | US | Two to three years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(2.10%)	(1.90%)
Downside 2 [member] | GDP [member] | Expected Worst Point | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(11.00%)	(0.30%)
Downside 2 [member] | GDP [member] | Expected Worst Point | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(6.00%)	(0.50%)
Downside 2 [member] | GDP [member] | 5-year averages | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.90%)	(0.60%)
Downside 2 [member] | GDP [member] | 5-year averages | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.10%)	(0.10%)
Downside 2 [member] | Unemployment [member] | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(10.10%)	(8.80%)
Downside 2 [member] | Unemployment [member] | UK | Up to one year [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(8.00%)	(4.10%)
Downside 2 [member] | Unemployment [member] | UK | One to two years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(9.30%)	(4.20%)
Downside 2 [member] | Unemployment [member] | UK | Two to three years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(7.80%)	(4.20%)
Downside 2 [member] | Unemployment [member] | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(13.70%)	(8.50%)
Downside 2 [member] | Unemployment [member] | US | Up to one year [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(13.40%)	(3.60%)
Downside 2 [member] | Unemployment [member] | US | One to two years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(11.90%)	(3.90%)
Downside 2 [member] | Unemployment [member] | US | Two to three years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(10.10%)	(4.00%)
Downside 2 [member] | Unemployment [member] | Expected Worst Point | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(10.10%)	(4.20%)
Downside 2 [member] | Unemployment [member] | Expected Worst Point | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(13.70%)	(4.00%)
Downside 2 [member] | Unemployment [member] | 5-year averages | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(7.20%)	(7.00%)
Downside 2 [member] | Unemployment [member] | 5-year averages | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(10.40%)	(6.60%)
Downside 2 [member] | HPI [member] | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(18.30%)	(31.10%)
Downside 2 [member] | HPI [member] | UK | Up to one year [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(13.60%)	(1.90%)
Downside 2 [member] | HPI [member] | UK | One to two years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(10.80%)	(3.10%)
Downside 2 [member] | HPI [member] | UK | Two to three years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.50%)	(3.60%)
Downside 2 [member] | HPI [member] | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(15.90%)	(16.70%)
Downside 2 [member] | HPI [member] | US | Up to one year [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(17.20%)	(3.40%)
Downside 2 [member] | HPI [member] | US | One to two years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.70%)	(2.90%)
Downside 2 [member] | HPI [member] | US | Two to three years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.60%)	(2.80%)
Downside 2 [member] | HPI [member] | Expected Worst Point | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(23.00%)	(0.30%)
Downside 2 [member] | HPI [member] | Expected Worst Point | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(17.80%)	(1.00%)
Downside 2 [member] | HPI [member] | 5-year averages | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(3.60%)	(6.90%)
Downside 2 [member] | HPI [member] | 5-year averages | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(3.00%)	(3.40%)
Downside 2 [member] | Bank Rate [Member] | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.60%)	(4.00%)
Downside 2 [member] | Bank Rate [Member] | UK | Up to one year [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.20%)	(0.60%)
Downside 2 [member] | Bank Rate [Member] | UK | One to two years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.20%)	(0.50%)
Downside 2 [member] | Bank Rate [Member] | UK | Two to three years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.10%)	(0.80%)
Downside 2 [member] | Bank Rate [Member] | Expected Worst Point | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.20%)	(0.50%)
Downside 2 [member] | Bank Rate [Member] | 5-year averages | UK
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.10%)	(3.10%)
Downside 2 [member] | Federal funds rate [member] | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(1.30%)	(3.50%)
Downside 2 [member] | Federal funds rate [member] | US | Up to one year [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.30%)	(1.70%)
Downside 2 [member] | Federal funds rate [member] | US | One to two years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.30%)	(1.50%)
Downside 2 [member] | Federal funds rate [member] | US | Two to three years [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.30%)	(1.70%)
Downside 2 [member] | Federal funds rate [member] | Expected Worst Point | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.30%)	(1.50%)
Downside 2 [member] | Federal funds rate [member] | 5-year averages | US
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	(0.30%)	(3.20%)

Other disclosures - Risk Man_15

Other disclosures - Risk Management and Principal Risks - Measurement uncertainty and sensitivity analysis - ECL under 100% weighted scenarios for modelled portfolios (audited) (Details) - GBP (£) £ in Millions	Dec. 31, 2020	Dec. 31, 2019
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ (1,329,242)	£ (1,119,650)
ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	9,399	6,630
Loans and advances [member] | Gross exposure [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(5,000)
Wholesale loans [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ (7,551)	£ (6,434)
Credit risk [member] | Home loans [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0.20%	0.20%
Credit risk [member] | Home loans [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	17.30%	16.00%
Credit risk [member] | Home loans [member] | Gross exposure [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 19,180	£ 16,889
Credit risk [member] | Home loans [member] | Gross exposure [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	1,778	1,670
Credit risk [member] | Home loans [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	350	315
Credit risk [member] | Home loans [member] | ECL | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	37	41
Credit risk [member] | Home loans [member] | ECL | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	307	268
Credit risk [member] | Home loans [member] | Stage 1 [member] | Gross exposure [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	131,422	137,929
Credit risk [member] | Home loans [member] | Stage 1 [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 6	£ 6
Credit risk [member] | Credit cards, unsecured loans and other retail lending [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	16.50%	13.80%
Credit risk [member] | Credit cards, unsecured loans and other retail lending [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	77.50%	73.10%
Credit risk [member] | Credit cards, unsecured loans and other retail lending [member] | Gross exposure [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 13,399	£ 13,406
Credit risk [member] | Credit cards, unsecured loans and other retail lending [member] | Gross exposure [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	2,585	3,008
Credit risk [member] | Credit cards, unsecured loans and other retail lending [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	4,602	4,547
Credit risk [member] | Credit cards, unsecured loans and other retail lending [member] | ECL | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	2,207	1,844
Credit risk [member] | Credit cards, unsecured loans and other retail lending [member] | ECL | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 2,003	£ 2,198
Credit risk [member] | Credit cards, unsecured loans and other retail lending [member] | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0.80%	0.70%
Credit risk [member] | Credit cards, unsecured loans and other retail lending [member] | Stage 1 [member] | Gross exposure [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 51,952	£ 68,619
Credit risk [member] | Credit cards, unsecured loans and other retail lending [member] | Stage 1 [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 392	£ 505
Credit risk [member] | Wholesale loans [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	4.30%	2.60%
Credit risk [member] | Wholesale loans [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	6.60%	7.90%
Credit risk [member] | Wholesale loans [member] | Gross exposure [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 32,677	£ 15,947
Credit risk [member] | Wholesale loans [member] | Gross exposure [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	2,211	1,489
Credit risk [member] | Wholesale loans [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	1,818	741
Credit risk [member] | Wholesale loans [member] | ECL | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	1,410	414
Credit risk [member] | Wholesale loans [member] | ECL | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 146	£ 118
Credit risk [member] | Wholesale loans [member] | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0.20%	0.10%
Credit risk [member] | Wholesale loans [member] | Stage 1 [member] | Gross exposure [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 149,099	£ 160,544
Credit risk [member] | Wholesale loans [member] | Stage 1 [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 262	£ 209
Upside 2 [member] | Home loans [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0.20%	0.20%
Upside 2 [member] | Home loans [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	15.90%	15.70%
Upside 2 [member] | Home loans [member] | Gross exposure [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 16,502	£ 15,245
Upside 2 [member] | Home loans [member] | Gross exposure [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	1,778	1,670
Upside 2 [member] | Home loans [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	317	299
Upside 2 [member] | Home loans [member] | ECL | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	31	33
Upside 2 [member] | Home loans [member] | ECL | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	282	262
Upside 2 [member] | Home loans [member] | Stage 1 [member] | Gross exposure [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	134,100	139,574
Upside 2 [member] | Home loans [member] | Stage 1 [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 4	£ 4
Upside 2 [member] | Credit cards, unsecured loans and other retail lending [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	15.30%	12.30%
Upside 2 [member] | Credit cards, unsecured loans and other retail lending [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	75.30%	71.60%
Upside 2 [member] | Credit cards, unsecured loans and other retail lending [member] | Gross exposure [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 10,572	£ 11,449
Upside 2 [member] | Credit cards, unsecured loans and other retail lending [member] | Gross exposure [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	2,585	3,008
Upside 2 [member] | Credit cards, unsecured loans and other retail lending [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	3,881	4,056
Upside 2 [member] | Credit cards, unsecured loans and other retail lending [member] | ECL | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	1,618	1,412
Upside 2 [member] | Credit cards, unsecured loans and other retail lending [member] | ECL | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 1,947	£ 2,154
Upside 2 [member] | Credit cards, unsecured loans and other retail lending [member] | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0.60%	0.70%
Upside 2 [member] | Credit cards, unsecured loans and other retail lending [member] | Stage 1 [member] | Gross exposure [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 53,271	£ 69,190
Upside 2 [member] | Credit cards, unsecured loans and other retail lending [member] | Stage 1 [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 316	£ 490
Upside 2 [member] | Wholesale loans [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	3.70%	2.10%
Upside 2 [member] | Wholesale loans [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	5.80%	7.40%
Upside 2 [member] | Wholesale loans [member] | Gross exposure [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 25,963	£ 13,773
Upside 2 [member] | Wholesale loans [member] | Gross exposure [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	2,211	1,489
Upside 2 [member] | Wholesale loans [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	1,322	558
Upside 2 [member] | Wholesale loans [member] | ECL | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	952	285
Upside 2 [member] | Wholesale loans [member] | ECL | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 128	£ 111
Upside 2 [member] | Wholesale loans [member] | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0.20%	0.10%
Upside 2 [member] | Wholesale loans [member] | Stage 1 [member] | Gross exposure [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 155,812	£ 162,717
Upside 2 [member] | Wholesale loans [member] | Stage 1 [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 242	£ 162
Upside 1 [member] | Home loans [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0.20%	0.20%
Upside 1 [member] | Home loans [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	16.10%	15.80%
Upside 1 [member] | Home loans [member] | Gross exposure [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 17,356	£ 15,826
Upside 1 [member] | Home loans [member] | Gross exposure [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	1,778	1,670
Upside 1 [member] | Home loans [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	323	303
Upside 1 [member] | Home loans [member] | ECL | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	32	34
Upside 1 [member] | Home loans [member] | ECL | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	286	264
Upside 1 [member] | Home loans [member] | Stage 1 [member] | Gross exposure [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	133,246	138,992
Upside 1 [member] | Home loans [member] | Stage 1 [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 5	£ 5
Upside 1 [member] | Credit cards, unsecured loans and other retail lending [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	15.90%	12.90%
Upside 1 [member] | Credit cards, unsecured loans and other retail lending [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	76.30%	72.30%
Upside 1 [member] | Credit cards, unsecured loans and other retail lending [member] | Gross exposure [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 11,579	£ 12,108
Upside 1 [member] | Credit cards, unsecured loans and other retail lending [member] | Gross exposure [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	2,585	3,008
Upside 1 [member] | Credit cards, unsecured loans and other retail lending [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	4,149	4,231
Upside 1 [member] | Credit cards, unsecured loans and other retail lending [member] | ECL | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	1,837	1,562
Upside 1 [member] | Credit cards, unsecured loans and other retail lending [member] | ECL | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 1,972	£ 2,174
Upside 1 [member] | Credit cards, unsecured loans and other retail lending [member] | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0.60%	0.70%
Upside 1 [member] | Credit cards, unsecured loans and other retail lending [member] | Stage 1 [member] | Gross exposure [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 52,932	£ 69,012
Upside 1 [member] | Credit cards, unsecured loans and other retail lending [member] | Stage 1 [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 340	£ 495
Upside 1 [member] | Wholesale loans [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	3.80%	2.20%
Upside 1 [member] | Wholesale loans [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	6.10%	7.60%
Upside 1 [member] | Wholesale loans [member] | Gross exposure [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 27,198	£ 14,433
Upside 1 [member] | Wholesale loans [member] | Gross exposure [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	2,211	1,489
Upside 1 [member] | Wholesale loans [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	1,439	611
Upside 1 [member] | Wholesale loans [member] | ECL | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	1,047	323
Upside 1 [member] | Wholesale loans [member] | ECL | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 134	£ 114
Upside 1 [member] | Wholesale loans [member] | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0.20%	0.10%
Upside 1 [member] | Wholesale loans [member] | Stage 1 [member] | Gross exposure [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 154,578	£ 162,058
Upside 1 [member] | Wholesale loans [member] | Stage 1 [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 258	£ 174
Baseline [member] | Home loans [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0.20%	0.20%
Baseline [member] | Home loans [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	16.30%	15.90%
Baseline [member] | Home loans [member] | Gross exposure [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 18,188	£ 16,570
Baseline [member] | Home loans [member] | Gross exposure [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	1,778	1,670
Baseline [member] | Home loans [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	329	307
Baseline [member] | Home loans [member] | ECL | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	33	36
Baseline [member] | Home loans [member] | ECL | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	290	266
Baseline [member] | Home loans [member] | Stage 1 [member] | Gross exposure [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	132,414	138,249
Baseline [member] | Home loans [member] | Stage 1 [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 6	£ 5
Baseline [member] | Credit cards, unsecured loans and other retail lending [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	16.20%	13.50%
Baseline [member] | Credit cards, unsecured loans and other retail lending [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	77.40%	73.00%
Baseline [member] | Credit cards, unsecured loans and other retail lending [member] | Gross exposure [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 13,176	£ 13,075
Baseline [member] | Credit cards, unsecured loans and other retail lending [member] | Gross exposure [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	2,585	3,008
Baseline [member] | Credit cards, unsecured loans and other retail lending [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	4,511	4,461
Baseline [member] | Credit cards, unsecured loans and other retail lending [member] | ECL | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	2,138	1,771
Baseline [member] | Credit cards, unsecured loans and other retail lending [member] | ECL | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 2,001	£ 2,195
Baseline [member] | Credit cards, unsecured loans and other retail lending [member] | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0.70%	0.70%
Baseline [member] | Credit cards, unsecured loans and other retail lending [member] | Stage 1 [member] | Gross exposure [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 51,995	£ 68,388
Baseline [member] | Credit cards, unsecured loans and other retail lending [member] | Stage 1 [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 372	£ 495
Baseline [member] | Wholesale loans [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	4.10%	2.40%
Baseline [member] | Wholesale loans [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	6.40%	7.90%
Baseline [member] | Wholesale loans [member] | Gross exposure [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 29,635	£ 15,380
Baseline [member] | Wholesale loans [member] | Gross exposure [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	2,211	1,489
Baseline [member] | Wholesale loans [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	1,613	679
Baseline [member] | Wholesale loans [member] | ECL | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	1,223	374
Baseline [member] | Wholesale loans [member] | ECL | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 141	£ 117
Baseline [member] | Wholesale loans [member] | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0.20%	0.10%
Baseline [member] | Wholesale loans [member] | Stage 1 [member] | Gross exposure [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 152,141	£ 161,111
Baseline [member] | Wholesale loans [member] | Stage 1 [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 249	£ 188
Downside 1 [member] | Home loans [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0.20%	0.30%
Downside 1 [member] | Home loans [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	17.90%	16.30%
Downside 1 [member] | Home loans [member] | Gross exposure [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 20,055	£ 18,364
Downside 1 [member] | Home loans [member] | Gross exposure [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	1,778	1,670
Downside 1 [member] | Home loans [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	374	326
Downside 1 [member] | Home loans [member] | ECL | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	42	47
Downside 1 [member] | Home loans [member] | ECL | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	318	272
Downside 1 [member] | Home loans [member] | Stage 1 [member] | Gross exposure [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	130,547	136,454
Downside 1 [member] | Home loans [member] | Stage 1 [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 14	£ 7
Downside 1 [member] | Credit cards, unsecured loans and other retail lending [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	17.40%	15.20%
Downside 1 [member] | Credit cards, unsecured loans and other retail lending [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	79.50%	74.30%
Downside 1 [member] | Credit cards, unsecured loans and other retail lending [member] | Gross exposure [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 16,477	£ 15,663
Downside 1 [member] | Credit cards, unsecured loans and other retail lending [member] | Gross exposure [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	2,585	3,008
Downside 1 [member] | Credit cards, unsecured loans and other retail lending [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	5,335	5,130
Downside 1 [member] | Credit cards, unsecured loans and other retail lending [member] | ECL | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	2,865	2,384
Downside 1 [member] | Credit cards, unsecured loans and other retail lending [member] | ECL | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 2,055	£ 2,235
Downside 1 [member] | Credit cards, unsecured loans and other retail lending [member] | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0.80%	0.70%
Downside 1 [member] | Credit cards, unsecured loans and other retail lending [member] | Stage 1 [member] | Gross exposure [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 50,168	£ 68,309
Downside 1 [member] | Credit cards, unsecured loans and other retail lending [member] | Stage 1 [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 415	£ 511
Downside 1 [member] | Wholesale loans [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	4.80%	3.10%
Downside 1 [member] | Wholesale loans [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	7.10%	8.50%
Downside 1 [member] | Wholesale loans [member] | Gross exposure [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 37,130	£ 18,770
Downside 1 [member] | Wholesale loans [member] | Gross exposure [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	2,211	1,489
Downside 1 [member] | Wholesale loans [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	2,206	977
Downside 1 [member] | Wholesale loans [member] | ECL | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	1,771	579
Downside 1 [member] | Wholesale loans [member] | ECL | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 157	£ 127
Downside 1 [member] | Wholesale loans [member] | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0.20%	0.20%
Downside 1 [member] | Wholesale loans [member] | Stage 1 [member] | Gross exposure [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 144,646	£ 157,720
Downside 1 [member] | Wholesale loans [member] | Stage 1 [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 278	£ 271
Downside 2 [member] | Home loans [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0.30%	0.80%
Downside 2 [member] | Home loans [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	21.70%	18.90%
Downside 2 [member] | Home loans [member] | Gross exposure [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 22,233	£ 22,314
Downside 2 [member] | Home loans [member] | Gross exposure [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	1,778	1,670
Downside 2 [member] | Home loans [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	491	505
Downside 2 [member] | Home loans [member] | ECL | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	63	170
Downside 2 [member] | Home loans [member] | ECL | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	386	316
Downside 2 [member] | Home loans [member] | Stage 1 [member] | Gross exposure [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	128,369	132,505
Downside 2 [member] | Home loans [member] | Stage 1 [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 42	£ 19
Downside 2 [member] | Credit cards, unsecured loans and other retail lending [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	18.40%	21.80%
Downside 2 [member] | Credit cards, unsecured loans and other retail lending [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	80.40%	76.20%
Downside 2 [member] | Credit cards, unsecured loans and other retail lending [member] | Gross exposure [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 19,322	£ 19,615
Downside 2 [member] | Credit cards, unsecured loans and other retail lending [member] | Gross exposure [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	2,585	3,008
Downside 2 [member] | Credit cards, unsecured loans and other retail lending [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	6,057	7,105
Downside 2 [member] | Credit cards, unsecured loans and other retail lending [member] | ECL | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	3,564	4,285
Downside 2 [member] | Credit cards, unsecured loans and other retail lending [member] | ECL | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 2,078	£ 2,292
Downside 2 [member] | Credit cards, unsecured loans and other retail lending [member] | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0.90%	0.80%
Downside 2 [member] | Credit cards, unsecured loans and other retail lending [member] | Stage 1 [member] | Gross exposure [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 48,717	£ 67,015
Downside 2 [member] | Credit cards, unsecured loans and other retail lending [member] | Stage 1 [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 415	£ 528
Downside 2 [member] | Wholesale loans [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	5.80%	4.30%
Downside 2 [member] | Wholesale loans [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	8.30%	8.60%
Downside 2 [member] | Wholesale loans [member] | Gross exposure [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 50,361	£ 33,168
Downside 2 [member] | Wholesale loans [member] | Gross exposure [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	2,211	1,489
Downside 2 [member] | Wholesale loans [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	3,385	1,852
Downside 2 [member] | Wholesale loans [member] | ECL | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	2,911	1,427
Downside 2 [member] | Wholesale loans [member] | ECL | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 184	£ 128
Downside 2 [member] | Wholesale loans [member] | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0.20%	0.20%
Downside 2 [member] | Wholesale loans [member] | Stage 1 [member] | Gross exposure [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 131,415	£ 143,323
Downside 2 [member] | Wholesale loans [member] | Stage 1 [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 290	£ 297

Other disclosures - Risk Man_16

Other disclosures - Risk Management and Principal Risks - Measurement uncertainty and sensitivity analysis - Reconciliation to total ECL (audited) (Details) - GBP (£) £ in Millions	Dec. 31, 2020	Dec. 31, 2019
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ (1,329,242)	£ (1,119,650)
ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	9,399	6,630
Total model ECL [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	6,770	5,603
ECL from individually assessed impairments [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	902	419
ECL from non-modelled and other management adjustments [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets		268
ECL from non-modelled and other management adjustments [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 1,727	£ 608

Other disclosures - Risk Man_17

Other disclosures - Risk Management and Principal Risks - Measurement uncertainty and sensitivity analysis (audited) (Narrative) (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of nature and extent of risks arising from financial instruments [line items]
Weighted expected credit loss, uplift percentage	100.00%
Financial assets	£ (1,329,242)	£ (1,119,650)
ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	9,399	6,630
Treasury assets ECL	13
ECL | Expected credit losses individually assessed [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	902	419
Loans and advances [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
ECL movement excluding assets derecognised due to disposals and write-off	£ 4,163	£ 2,053
Loans and advances [member] | Portfolios with management adjustments over threshold [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Impairment allowance including loan commitments and financial guarantee contracts, percentage	14.80%	5.10%
Management adjustments to impairment allowances, including forbearance	£ 1,388	£ 340
Loans and advances [member] | Financial assets at amortised cost [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	2.40%	1.80%
Financial assets	£ (342,632)	£ (339,115)
Coverage ratio	2.40%	1.80%
Loans and advances [member] | Financial assets at amortised cost [member] | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ (289,931)	£ (298,559)
Coverage ratio	0.40%	0.20%
Loans and advances [member] | Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ (47,442)	£ (35,861)
Coverage ratio	7.00%	6.20%
Loans and advances [member] | Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ (5,259)	£ (4,695)
Coverage ratio	41.50%	40.70%
Loans and advances [member] | Gross exposure [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ (5,000)
Increase (decrease) in transfers into stage 2 (from stage 1)	£ 3,510
Increase (decrease) in transfers into stage 2 (from stage 1), percentage	1.00%
Loans and advances [member] | Gross exposure [member] | Financial assets at amortised cost [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 350,967	£ 345,423
Loans and advances [member] | Gross exposure [member] | Financial assets at amortised cost [member] | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	290,964	299,266
Loans and advances [member] | Gross exposure [member] | Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	51,006	38,234
Loans and advances [member] | Gross exposure [member] | Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	8,997	7,923
Loans and advances [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
ECL movement excluding assets derecognised due to disposals and write-off	232
Loans and advances [member] | ECL | Financial assets at amortised cost [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	8,335	6,308
Loans and advances [member] | ECL | Financial assets at amortised cost [member] | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	1,033	707
Loans and advances [member] | ECL | Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	3,564	2,373
Loans and advances [member] | ECL | Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	3,738	3,228
Home loans [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
ECL movement excluding assets derecognised due to disposals and write-off	£ 128	£ (1)
Home loans [member] | Portfolios with management adjustments over threshold [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Impairment allowance including loan commitments and financial guarantee contracts, percentage	24.30%	13.20%
Management adjustments to impairment allowances, including forbearance	£ (131)	£ (57)
Home loans [member] | Financial assets at amortised cost [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ (159,647)	£ (154,479)
Coverage ratio	0.30%	0.30%
Home loans [member] | Financial assets at amortised cost [member] | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ (138,606)	£ (135,691)
Coverage ratio	0.00%	0.00%
Home loans [member] | Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ (19,228)	£ (16,979)
Coverage ratio	0.40%	0.40%
Home loans [member] | Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ (1,813)	£ (1,809)
Coverage ratio	18.80%	16.10%
Home loans [member] | Gross exposure [member] | Financial assets at amortised cost [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 160,185	£ 154,911
Home loans [member] | Gross exposure [member] | Financial assets at amortised cost [member] | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	138,639	135,713
Home loans [member] | Gross exposure [member] | Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	19,312	17,043
Home loans [member] | Gross exposure [member] | Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	2,234	2,155
Home loans [member] | ECL | Financial assets at amortised cost [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	538	432
Home loans [member] | ECL | Financial assets at amortised cost [member] | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	33	22
Home loans [member] | ECL | Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	84	64
Home loans [member] | ECL | Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	421	346
Credit cards, unsecured loans and other retail lending [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
ECL movement excluding assets derecognised due to disposals and write-off	£ 2,597	£ 1,863
Credit cards, unsecured loans and other retail lending [member] | Portfolios with management adjustments over threshold [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Impairment allowance including loan commitments and financial guarantee contracts, percentage	20.30%	6.20%
Management adjustments to impairment allowances, including forbearance	£ (1,234)	£ (308)
Credit cards, unsecured loans and other retail lending [member] | Financial assets at amortised cost [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ (40,813)	£ (55,296)
Coverage ratio	12.30%	8.10%
Credit cards, unsecured loans and other retail lending [member] | Financial assets at amortised cost [member] | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ (32,341)	£ (45,470)
Coverage ratio	2.10%	1.20%
Credit cards, unsecured loans and other retail lending [member] | Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ (7,551)	£ (8,752)
Coverage ratio	26.80%	18.70%
Credit cards, unsecured loans and other retail lending [member] | Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ (921)	£ (1,074)
Coverage ratio	71.00%	68.50%
Credit cards, unsecured loans and other retail lending [member] | Gross exposure [member] | Financial assets at amortised cost [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 46,513	£ 60,180
Credit cards, unsecured loans and other retail lending [member] | Gross exposure [member] | Financial assets at amortised cost [member] | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	33,021	46,012
Credit cards, unsecured loans and other retail lending [member] | Gross exposure [member] | Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	10,320	10,759
Credit cards, unsecured loans and other retail lending [member] | Gross exposure [member] | Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	3,172	3,409
Credit cards, unsecured loans and other retail lending [member] | ECL | Financial assets at amortised cost [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	5,700	4,884
Credit cards, unsecured loans and other retail lending [member] | ECL | Financial assets at amortised cost [member] | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	680	542
Credit cards, unsecured loans and other retail lending [member] | ECL | Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	2,769	2,007
Credit cards, unsecured loans and other retail lending [member] | ECL | Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	2,251	2,335
Wholesale loans [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	(7,551)	(6,434)
ECL movement excluding assets derecognised due to disposals and write-off	£ 1,438	£ 191
Wholesale loans [member] | Portfolios with management adjustments over threshold [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Impairment allowance including loan commitments and financial guarantee contracts, percentage	0.80%	(2.10%)
Management adjustments to impairment allowances, including forbearance	£ (23)	£ 25
Wholesale loans [member] | Financial assets at amortised cost [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ (142,172)	£ (129,340)
Coverage ratio	1.50%	0.80%
Wholesale loans [member] | Financial assets at amortised cost [member] | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ (118,984)	£ (117,398)
Coverage ratio	0.30%	0.10%
Wholesale loans [member] | Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ (20,663)	£ (10,130)
Coverage ratio	3.30%	2.90%
Wholesale loans [member] | Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ (2,525)	£ (1,812)
Coverage ratio	29.70%	23.20%
Wholesale loans [member] | Gross exposure [member] | Financial assets at amortised cost [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 144,269	£ 130,332
Wholesale loans [member] | Gross exposure [member] | Financial assets at amortised cost [member] | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	119,304	117,541
Wholesale loans [member] | Gross exposure [member] | Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	21,374	10,432
Wholesale loans [member] | Gross exposure [member] | Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	3,591	2,359
Wholesale loans [member] | ECL | Financial assets at amortised cost [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	2,097	992
Wholesale loans [member] | ECL | Financial assets at amortised cost [member] | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	320	143
Wholesale loans [member] | ECL | Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	711	302
Wholesale loans [member] | ECL | Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 1,066	£ 547
Credit risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Description of method, parameters and assumptions used in preparing sensitivity analysis reflecting interdependencies between risk variables	The methodology for estimating probability weights for each of the scenarios involves a comparison of the distribution of key historical UK and US macroeconomic variables against the forecast paths of the five scenarios. The methodology works such that the Baseline (reflecting current consensus outlook) has the highest weight and the weights of adverse and favourable scenarios depend on the deviation from the Baseline; the further from the Baseline, the smaller the weight. This is reflected in the table below where the probability weights of the scenarios are shown. A single set of five scenarios is used across all portfolios and all five weights are normalised to equate to 100%. The same scenarios and weights that are used in the estimation of expected credit losses are also used for Barclays internal planning purposes. The impacts across the portfolios are different because of the sensitivities of each of the portfolios to specific macroeconomic variables, for example, mortgages are highly sensitive to house prices, credit cards and unsecured consumer loans are highly sensitive to unemployment.
Term at which scenario converges to steady state	8 years
Credit risk [member] | Home loans [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0.20%	0.20%
Credit risk [member] | Home loans [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	17.30%	16.00%
Credit risk [member] | Home loans [member] | Gross exposure [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 19,180	£ 16,889
Credit risk [member] | Home loans [member] | Gross exposure [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	1,778	1,670
Credit risk [member] | Home loans [member] | Gross exposure [member] | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	131,422	137,929
Credit risk [member] | Home loans [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	350	315
Credit risk [member] | Home loans [member] | ECL | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	37	41
Credit risk [member] | Home loans [member] | ECL | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	307	268
Credit risk [member] | Home loans [member] | ECL | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 6	£ 6
Credit risk [member] | Credit cards, unsecured loans and other retail lending [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	16.50%	13.80%
Credit risk [member] | Credit cards, unsecured loans and other retail lending [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	77.50%	73.10%
Credit risk [member] | Credit cards, unsecured loans and other retail lending [member] | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0.80%	0.70%
Credit risk [member] | Credit cards, unsecured loans and other retail lending [member] | Gross exposure [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 13,399	£ 13,406
Credit risk [member] | Credit cards, unsecured loans and other retail lending [member] | Gross exposure [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	2,585	3,008
Credit risk [member] | Credit cards, unsecured loans and other retail lending [member] | Gross exposure [member] | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	51,952	68,619
Credit risk [member] | Credit cards, unsecured loans and other retail lending [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	4,602	4,547
Credit risk [member] | Credit cards, unsecured loans and other retail lending [member] | ECL | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	2,207	1,844
Credit risk [member] | Credit cards, unsecured loans and other retail lending [member] | ECL | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	2,003	2,198
Credit risk [member] | Credit cards, unsecured loans and other retail lending [member] | ECL | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 392	£ 505
Credit risk [member] | Wholesale loans [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	4.30%	2.60%
Credit risk [member] | Wholesale loans [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	6.60%	7.90%
Credit risk [member] | Wholesale loans [member] | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0.20%	0.10%
Credit risk [member] | Wholesale loans [member] | Gross exposure [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 32,677	£ 15,947
Credit risk [member] | Wholesale loans [member] | Gross exposure [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	2,211	1,489
Credit risk [member] | Wholesale loans [member] | Gross exposure [member] | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	149,099	160,544
Credit risk [member] | Wholesale loans [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	1,818	741
Credit risk [member] | Wholesale loans [member] | ECL | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	1,410	414
Credit risk [member] | Wholesale loans [member] | ECL | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	146	118
Credit risk [member] | Wholesale loans [member] | ECL | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 262	£ 209
Upside 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	24.20%	23.10%
Upside 1 [member] | Home loans [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0.20%	0.20%
Upside 1 [member] | Home loans [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	16.10%	15.80%
Upside 1 [member] | Home loans [member] | Gross exposure [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 17,356	£ 15,826
Upside 1 [member] | Home loans [member] | Gross exposure [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	1,778	1,670
Upside 1 [member] | Home loans [member] | Gross exposure [member] | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	133,246	138,992
Upside 1 [member] | Home loans [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	323	303
Upside 1 [member] | Home loans [member] | ECL | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	32	34
Upside 1 [member] | Home loans [member] | ECL | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	286	264
Upside 1 [member] | Home loans [member] | ECL | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 5	£ 5
Upside 1 [member] | Credit cards, unsecured loans and other retail lending [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	15.90%	12.90%
Upside 1 [member] | Credit cards, unsecured loans and other retail lending [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	76.30%	72.30%
Upside 1 [member] | Credit cards, unsecured loans and other retail lending [member] | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0.60%	0.70%
Upside 1 [member] | Credit cards, unsecured loans and other retail lending [member] | Gross exposure [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 11,579	£ 12,108
Upside 1 [member] | Credit cards, unsecured loans and other retail lending [member] | Gross exposure [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	2,585	3,008
Upside 1 [member] | Credit cards, unsecured loans and other retail lending [member] | Gross exposure [member] | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	52,932	69,012
Upside 1 [member] | Credit cards, unsecured loans and other retail lending [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	4,149	4,231
Upside 1 [member] | Credit cards, unsecured loans and other retail lending [member] | ECL | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	1,837	1,562
Upside 1 [member] | Credit cards, unsecured loans and other retail lending [member] | ECL | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	1,972	2,174
Upside 1 [member] | Credit cards, unsecured loans and other retail lending [member] | ECL | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 340	£ 495
Upside 1 [member] | Wholesale loans [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	3.80%	2.20%
Upside 1 [member] | Wholesale loans [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	6.10%	7.60%
Upside 1 [member] | Wholesale loans [member] | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0.20%	0.10%
Upside 1 [member] | Wholesale loans [member] | Gross exposure [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 27,198	£ 14,433
Upside 1 [member] | Wholesale loans [member] | Gross exposure [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	2,211	1,489
Upside 1 [member] | Wholesale loans [member] | Gross exposure [member] | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	154,578	162,058
Upside 1 [member] | Wholesale loans [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	1,439	611
Upside 1 [member] | Wholesale loans [member] | ECL | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	1,047	323
Upside 1 [member] | Wholesale loans [member] | ECL | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	134	114
Upside 1 [member] | Wholesale loans [member] | ECL | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 258	£ 174
Upside 1 [member] | UK | GDP [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	8.80%	11.70%
Upside 1 [member] | UK | Unemployment [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	4.00%	3.80%
Upside 1 [member] | UK | HPI [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	30.80%	28.80%
Upside 1 [member] | US | GDP [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	12.80%	14.90%
Upside 1 [member] | US | Unemployment [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	3.80%	3.50%
Upside 1 [member] | US | HPI [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	30.90%	23.70%
Upside 1 [member] | US | Federal funds rate [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	0.10%	1.50%
Upside 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	20.20%	10.10%
Upside 2 [member] | Home loans [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0.20%	0.20%
Upside 2 [member] | Home loans [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	15.90%	15.70%
Upside 2 [member] | Home loans [member] | Gross exposure [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 16,502	£ 15,245
Upside 2 [member] | Home loans [member] | Gross exposure [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	1,778	1,670
Upside 2 [member] | Home loans [member] | Gross exposure [member] | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	134,100	139,574
Upside 2 [member] | Home loans [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	317	299
Upside 2 [member] | Home loans [member] | ECL | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	31	33
Upside 2 [member] | Home loans [member] | ECL | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	282	262
Upside 2 [member] | Home loans [member] | ECL | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 4	£ 4
Upside 2 [member] | Credit cards, unsecured loans and other retail lending [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	15.30%	12.30%
Upside 2 [member] | Credit cards, unsecured loans and other retail lending [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	75.30%	71.60%
Upside 2 [member] | Credit cards, unsecured loans and other retail lending [member] | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0.60%	0.70%
Upside 2 [member] | Credit cards, unsecured loans and other retail lending [member] | Gross exposure [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 10,572	£ 11,449
Upside 2 [member] | Credit cards, unsecured loans and other retail lending [member] | Gross exposure [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	2,585	3,008
Upside 2 [member] | Credit cards, unsecured loans and other retail lending [member] | Gross exposure [member] | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	53,271	69,190
Upside 2 [member] | Credit cards, unsecured loans and other retail lending [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	3,881	4,056
Upside 2 [member] | Credit cards, unsecured loans and other retail lending [member] | ECL | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	1,618	1,412
Upside 2 [member] | Credit cards, unsecured loans and other retail lending [member] | ECL | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	1,947	2,154
Upside 2 [member] | Credit cards, unsecured loans and other retail lending [member] | ECL | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 316	£ 490
Upside 2 [member] | Wholesale loans [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	3.70%	2.10%
Upside 2 [member] | Wholesale loans [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	5.80%	7.40%
Upside 2 [member] | Wholesale loans [member] | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0.20%	0.10%
Upside 2 [member] | Wholesale loans [member] | Gross exposure [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 25,963	£ 13,773
Upside 2 [member] | Wholesale loans [member] | Gross exposure [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	2,211	1,489
Upside 2 [member] | Wholesale loans [member] | Gross exposure [member] | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	155,812	162,717
Upside 2 [member] | Wholesale loans [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	1,322	558
Upside 2 [member] | Wholesale loans [member] | ECL | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	952	285
Upside 2 [member] | Wholesale loans [member] | ECL | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	128	111
Upside 2 [member] | Wholesale loans [member] | ECL | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 242	£ 162
Upside 2 [member] | UK | GDP [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	14.20%	15.40%
Upside 2 [member] | UK | Unemployment [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	4.00%	3.40%
Upside 2 [member] | UK | HPI [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	48.20%	41.10%
Upside 2 [member] | US | GDP [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	15.70%	17.90%
Upside 2 [member] | US | Unemployment [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	3.80%	3.00%
Upside 2 [member] | US | HPI [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	42.20%	35.80%
Upside 2 [member] | US | Federal funds rate [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	0.10%	1.50%
Baseline [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	24.70%	40.80%
Baseline [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Weighted expected credit loss, uplift percentage	5.00%
Baseline [member] | Home loans [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0.20%	0.20%
Baseline [member] | Home loans [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	16.30%	15.90%
Baseline [member] | Home loans [member] | Gross exposure [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 18,188	£ 16,570
Baseline [member] | Home loans [member] | Gross exposure [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	1,778	1,670
Baseline [member] | Home loans [member] | Gross exposure [member] | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	132,414	138,249
Baseline [member] | Home loans [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 329	307
Increase (decrease) in coverage rates	6.00%
Baseline [member] | Home loans [member] | ECL | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 33	36
Baseline [member] | Home loans [member] | ECL | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	290	266
Baseline [member] | Home loans [member] | ECL | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 6	£ 5
Baseline [member] | Credit cards, unsecured loans and other retail lending [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	16.20%	13.50%
Baseline [member] | Credit cards, unsecured loans and other retail lending [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	77.40%	73.00%
Baseline [member] | Credit cards, unsecured loans and other retail lending [member] | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0.70%	0.70%
Baseline [member] | Credit cards, unsecured loans and other retail lending [member] | Gross exposure [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
ECL movement excluding assets derecognised due to disposals and write-off		£ 6,000
Baseline [member] | Credit cards, unsecured loans and other retail lending [member] | Gross exposure [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 13,176	13,075
Baseline [member] | Credit cards, unsecured loans and other retail lending [member] | Gross exposure [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	2,585	3,008
Baseline [member] | Credit cards, unsecured loans and other retail lending [member] | Gross exposure [member] | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	51,995	68,388
Baseline [member] | Credit cards, unsecured loans and other retail lending [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 4,511	4,461
Increase (decrease) in coverage rates	2.00%
Baseline [member] | Credit cards, unsecured loans and other retail lending [member] | ECL | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 2,138	1,771
Baseline [member] | Credit cards, unsecured loans and other retail lending [member] | ECL | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	2,001	2,195
Baseline [member] | Credit cards, unsecured loans and other retail lending [member] | ECL | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 372	£ 495
Baseline [member] | Wholesale loans [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	4.10%	2.40%
Baseline [member] | Wholesale loans [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	6.40%	7.90%
Baseline [member] | Wholesale loans [member] | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0.20%	0.10%
Baseline [member] | Wholesale loans [member] | Gross exposure [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 29,635	£ 15,380
Baseline [member] | Wholesale loans [member] | Gross exposure [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	2,211	1,489
Baseline [member] | Wholesale loans [member] | Gross exposure [member] | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	152,141	161,111
Baseline [member] | Wholesale loans [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 1,613	679
Increase (decrease) in coverage rates	13.00%
Baseline [member] | Wholesale loans [member] | ECL | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 1,223	374
Baseline [member] | Wholesale loans [member] | ECL | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	141	117
Baseline [member] | Wholesale loans [member] | ECL | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 249	£ 188
Baseline [member] | UK | GDP [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	0.70%	1.50%
Baseline [member] | UK | Unemployment [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	5.70%	4.10%
Baseline [member] | UK | HPI [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	3.60%	2.80%
Baseline [member] | US | GDP [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	1.60%	2.10%
Baseline [member] | US | Unemployment [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	6.40%	3.90%
Baseline [member] | US | HPI [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	3.80%	3.20%
Baseline [member] | US | Federal funds rate [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	0.30%	1.80%
Downside 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	15.50%	22.70%
Downside 1 [member] | Home loans [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0.20%	0.30%
Downside 1 [member] | Home loans [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	17.90%	16.30%
Downside 1 [member] | Home loans [member] | Gross exposure [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 20,055	£ 18,364
Downside 1 [member] | Home loans [member] | Gross exposure [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	1,778	1,670
Downside 1 [member] | Home loans [member] | Gross exposure [member] | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	130,547	136,454
Downside 1 [member] | Home loans [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	374	326
Downside 1 [member] | Home loans [member] | ECL | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	42	47
Downside 1 [member] | Home loans [member] | ECL | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	318	272
Downside 1 [member] | Home loans [member] | ECL | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 14	£ 7
Downside 1 [member] | Credit cards, unsecured loans and other retail lending [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	17.40%	15.20%
Downside 1 [member] | Credit cards, unsecured loans and other retail lending [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	79.50%	74.30%
Downside 1 [member] | Credit cards, unsecured loans and other retail lending [member] | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0.80%	0.70%
Downside 1 [member] | Credit cards, unsecured loans and other retail lending [member] | Gross exposure [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 16,477	£ 15,663
Downside 1 [member] | Credit cards, unsecured loans and other retail lending [member] | Gross exposure [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	2,585	3,008
Downside 1 [member] | Credit cards, unsecured loans and other retail lending [member] | Gross exposure [member] | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	50,168	68,309
Downside 1 [member] | Credit cards, unsecured loans and other retail lending [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	5,335	5,130
Downside 1 [member] | Credit cards, unsecured loans and other retail lending [member] | ECL | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	2,865	2,384
Downside 1 [member] | Credit cards, unsecured loans and other retail lending [member] | ECL | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	2,055	2,235
Downside 1 [member] | Credit cards, unsecured loans and other retail lending [member] | ECL | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 415	£ 511
Downside 1 [member] | Wholesale loans [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	4.80%	3.10%
Downside 1 [member] | Wholesale loans [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	7.10%	8.50%
Downside 1 [member] | Wholesale loans [member] | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0.20%	0.20%
Downside 1 [member] | Wholesale loans [member] | Gross exposure [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 37,130	£ 18,770
Downside 1 [member] | Wholesale loans [member] | Gross exposure [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	2,211	1,489
Downside 1 [member] | Wholesale loans [member] | Gross exposure [member] | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	144,646	157,720
Downside 1 [member] | Wholesale loans [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	2,206	977
Downside 1 [member] | Wholesale loans [member] | ECL | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	1,771	579
Downside 1 [member] | Wholesale loans [member] | ECL | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	157	127
Downside 1 [member] | Wholesale loans [member] | ECL | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 278	£ 271
Downside 1 [member] | UK | GDP [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	22.10%	0.20%
Downside 1 [member] | UK | Unemployment [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	8.40%	5.80%
Downside 1 [member] | UK | HPI [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	4.50%	6.30%
Downside 1 [member] | US | GDP [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	10.60%	0.50%
Downside 1 [member] | US | Unemployment [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	13.00%	5.40%
Downside 1 [member] | US | HPI [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	3.70%	0.30%
Downside 1 [member] | US | Federal funds rate [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	1.30%	3.00%
Downside 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	15.40%	3.30%
Downside 2 [member] | Loans and advances [member] | Gross exposure [member] | Financial assets at amortised cost [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Transfers into Stage 2	£ 27,000
Downside 2 [member] | Home loans [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0.30%	0.80%
Downside 2 [member] | Home loans [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	21.70%	18.90%
Downside 2 [member] | Home loans [member] | Gross exposure [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 22,233	£ 22,314
Downside 2 [member] | Home loans [member] | Gross exposure [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	1,778	1,670
Downside 2 [member] | Home loans [member] | Gross exposure [member] | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	128,369	132,505
Downside 2 [member] | Home loans [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	491	505
Downside 2 [member] | Home loans [member] | ECL | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	63	170
Downside 2 [member] | Home loans [member] | ECL | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	386	316
Downside 2 [member] | Home loans [member] | ECL | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 42	£ 19
Downside 2 [member] | Credit cards, unsecured loans and other retail lending [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	18.40%	21.80%
Downside 2 [member] | Credit cards, unsecured loans and other retail lending [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	80.40%	76.20%
Downside 2 [member] | Credit cards, unsecured loans and other retail lending [member] | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0.90%	0.80%
Downside 2 [member] | Credit cards, unsecured loans and other retail lending [member] | Gross exposure [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 19,322	£ 19,615
Downside 2 [member] | Credit cards, unsecured loans and other retail lending [member] | Gross exposure [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	2,585	3,008
Downside 2 [member] | Credit cards, unsecured loans and other retail lending [member] | Gross exposure [member] | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	48,717	67,015
Downside 2 [member] | Credit cards, unsecured loans and other retail lending [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	6,057	7,105
Downside 2 [member] | Credit cards, unsecured loans and other retail lending [member] | ECL | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	3,564	4,285
Downside 2 [member] | Credit cards, unsecured loans and other retail lending [member] | ECL | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	2,078	2,292
Downside 2 [member] | Credit cards, unsecured loans and other retail lending [member] | ECL | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 415	£ 528
Downside 2 [member] | Wholesale loans [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	5.80%	4.30%
Downside 2 [member] | Wholesale loans [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	8.30%	8.60%
Downside 2 [member] | Wholesale loans [member] | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Coverage ratio	0.20%	0.20%
Downside 2 [member] | Wholesale loans [member] | Gross exposure [member] | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 50,361	£ 33,168
Downside 2 [member] | Wholesale loans [member] | Gross exposure [member] | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	2,211	1,489
Downside 2 [member] | Wholesale loans [member] | Gross exposure [member] | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	131,415	143,323
Downside 2 [member] | Wholesale loans [member] | ECL
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	3,385	1,852
Downside 2 [member] | Wholesale loans [member] | ECL | Stage 2 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	2,911	1,427
Downside 2 [member] | Wholesale loans [member] | ECL | Credit Impaired - Stage 3 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	184	128
Downside 2 [member] | Wholesale loans [member] | ECL | Stage 1 [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	290	297
Downside 2 [member] | Wholesale loans [member] | ECL | Expected credit losses individually assessed [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets		£ 419
Downside 2 [member] | Wholesale loans [member] | ECL | Expected credit losses individually assessed [member] | Financial assets at amortised cost [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Financial assets	£ 902
Downside 2 [member] | UK | GDP [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	22.10%	4.60%
Downside 2 [member] | UK | Unemployment [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	10.10%	8.80%
Downside 2 [member] | UK | HPI [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	18.30%	31.10%
Downside 2 [member] | UK | Loans and advances [member] | Gross exposure [member] | Financial assets at amortised cost [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	14.00%
Downside 2 [member] | UK | Home loans [member] | HPI [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	18.30%
Downside 2 [member] | US | GDP [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	10.60%	3.00%
Downside 2 [member] | US | Unemployment [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	13.70%	8.50%
Downside 2 [member] | US | HPI [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	15.90%	16.70%
Downside 2 [member] | US | Federal funds rate [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	1.30%	3.50%
Downside 2 [member] | US | Loans and advances [member] | Gross exposure [member] | Financial assets at amortised cost [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Expected credit loss rate	10.00%

Other disclosures - Risk Man_18

Other disclosures - Risk Management and Principal Risks - Credit risk concentrations by geography (audited) (Details) - GBP (£) £ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
On-balance sheet
Cash and balances at central banks	£ 191,127	£ 150,258	£ 177,069
Cash collateral and settlement balances	101,367	83,256
Loans and advances at amortised cost	342,632	339,115
Reverse repurchase agreements and other similar secured lending	9,031	3,379
Trading portfolio assets	127,950	114,195
Financial assets at fair value through the income statement	175,151	133,086
Derivative financial instruments	302,446	229,236
Financial assets at fair value through other comprehensive income	78,688	65,750
Other assets	850	1,375
Total assets	1,349,514	1,140,229	£ 1,133,300
Off-balance sheet
Contingent liabilities	21,609	24,527
Total off-balance sheet	354,658	358,982
Total	1,615,399	1,414,036
Credit risk [member]
On-balance sheet
Cash and balances at central banks	191,127	150,258
Cash collateral and settlement balances	101,367	83,256
Loans and advances at amortised cost	342,632	339,115
Reverse repurchase agreements and other similar secured lending	9,031	3,379
Trading portfolio assets	64,830	58,117
Financial assets at fair value through the income statement	170,531	125,591
Derivative financial instruments	302,446	229,236
Financial assets at fair value through other comprehensive income	77,927	64,727
Other assets	850	1,375
Total assets	1,260,741	1,055,054
Off-balance sheet
Contingent liabilities	21,609	24,527
Loan commitments	333,049	334,455
Total off-balance sheet	354,658	358,982
United Kingdom [member]
Off-balance sheet
Total	629,798	571,484
United Kingdom [member] | Credit risk [member]
On-balance sheet
Cash and balances at central banks	66,459	51,477
Cash collateral and settlement balances	33,893	27,431
Loans and advances at amortised cost	262,231	257,459
Reverse repurchase agreements and other similar secured lending	10	1,005
Trading portfolio assets	9,829	11,550
Financial assets at fair value through the income statement	34,229	29,001
Derivative financial instruments	93,430	69,844
Financial assets at fair value through other comprehensive income	10,672	9,444
Other assets	608	1,170
Total assets	511,361	458,595
Off-balance sheet
Contingent liabilities	5,876	7,539
Loan commitments	112,561	105,350
Total off-balance sheet	118,437	112,889
Americas [member]
Off-balance sheet
Total	528,461	482,214
Americas [member] | Credit risk [member]
On-balance sheet
Cash and balances at central banks	36,063	28,273
Cash collateral and settlement balances	27,287	23,595
Loans and advances at amortised cost	41,094	46,569
Reverse repurchase agreements and other similar secured lending	152	15
Trading portfolio assets	31,000	27,621
Financial assets at fair value through the income statement	88,327	70,849
Derivative financial instruments	90,801	63,344
Financial assets at fair value through other comprehensive income	27,504	23,052
Other assets	185	126
Total assets	342,413	283,267
Off-balance sheet
Contingent liabilities	10,122	10,838
Loan commitments	175,926	188,109
Total off-balance sheet	186,048	198,947
Europe [member]
Off-balance sheet
Total	340,633	279,523
Europe [member] | Credit risk [member]
On-balance sheet
Cash and balances at central banks	69,963	54,632
Cash collateral and settlement balances	30,121	26,008
Loans and advances at amortised cost	24,949	25,599
Reverse repurchase agreements and other similar secured lending	373	1,056
Trading portfolio assets	17,107	13,397
Financial assets at fair value through the income statement	25,709	11,286
Derivative financial instruments	101,102	83,165
Financial assets at fair value through other comprehensive income	28,607	24,443
Other assets	57	79
Total assets	297,988	239,628
Off-balance sheet
Contingent liabilities	3,809	3,862
Loan commitments	38,836	36,033
Total off-balance sheet	42,645	39,895
Asia [member]
Off-balance sheet
Total	98,177	68,162
Asia [member] | Credit risk [member]
On-balance sheet
Cash and balances at central banks	17,987	15,130
Cash collateral and settlement balances	9,558	5,385
Loans and advances at amortised cost	10,728	6,275
Reverse repurchase agreements and other similar secured lending	8,285	470
Trading portfolio assets	5,948	4,786
Financial assets at fair value through the income statement	14,742	12,534
Derivative financial instruments	14,532	11,189
Financial assets at fair value through other comprehensive income	11,006	7,665
Other assets	0	0
Total assets	92,786	63,434
Off-balance sheet
Contingent liabilities	1,222	1,562
Loan commitments	4,169	3,166
Total off-balance sheet	5,391	4,728
Africa and middle east [member]
Off-balance sheet
Total	18,330	12,653
Africa and middle east [member] | Credit risk [member]
On-balance sheet
Cash and balances at central banks	655	746
Cash collateral and settlement balances	508	837
Loans and advances at amortised cost	3,630	3,213
Reverse repurchase agreements and other similar secured lending	211	833
Trading portfolio assets	946	763
Financial assets at fair value through the income statement	7,524	1,921
Derivative financial instruments	2,581	1,694
Financial assets at fair value through other comprehensive income	138	123
Other assets	0	0
Total assets	16,193	10,130
Off-balance sheet
Contingent liabilities	580	726
Loan commitments	1,557	1,797
Total off-balance sheet	£ 2,137	£ 2,523

Other disclosures - Risk Man_19

Other disclosures - Risk Management and Principal Risks - Credit risk concentrations by industry (audited) (Details) - GBP (£) £ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
On-balance sheet
Cash and balances at central banks	£ 191,127	£ 150,258	£ 177,069
Cash collateral and settlement balance assets	101,367	83,256
Loans and advances at amortised cost	342,632	339,115
Reverse repurchase agreements and other similar secured lending	9,031	3,379
Trading portfolio assets	127,950	114,195
Financial assets at fair value through the income statement	175,151	133,086
Derivative financial instruments	302,446	229,236
Financial assets at fair value through other comprehensive income	78,688	65,750
Other assets	850	1,375
Assets	1,349,514	1,140,229	£ 1,133,300
Off-balance sheet
Contingent liabilities	21,609	24,527
Total off-balance sheet	354,658	358,982
Total	1,615,399	1,414,036
Credit risk [member]
On-balance sheet
Cash and balances at central banks	191,127	150,258
Cash collateral and settlement balance assets	101,367	83,256
Loans and advances at amortised cost	342,632	339,115
Reverse repurchase agreements and other similar secured lending	9,031	3,379
Trading portfolio assets	64,830	58,117
Financial assets at fair value through the income statement	170,531	125,591
Derivative financial instruments	302,446	229,236
Financial assets at fair value through other comprehensive income	77,927	64,727
Other assets	850	1,375
Assets	1,260,741	1,055,054
Off-balance sheet
Contingent liabilities	21,609	24,527
Loan commitments	333,049	334,455
Total off-balance sheet	354,658	358,982
Banks [member]
Off-balance sheet
Total	229,446	188,160
Banks [member] | Credit risk [member]
On-balance sheet
Cash and balances at central banks	56	7
Cash collateral and settlement balance assets	17,986	16,599
Loans and advances at amortised cost	8,133	8,788
Reverse repurchase agreements and other similar secured lending	706	1,172
Trading portfolio assets	2,743	2,872
Financial assets at fair value through the income statement	21,824	10,747
Derivative financial instruments	155,767	125,323
Financial assets at fair value through other comprehensive income	18,829	18,596
Other assets	439	897
Assets	226,483	185,001
Off-balance sheet
Contingent liabilities	1,150	1,250
Loan commitments	1,813	1,909
Total off-balance sheet	2,963	3,159
Other financial institutions [member]
Off-balance sheet
Total	422,852	328,675
Other financial institutions [member] | Credit risk [member]
On-balance sheet
Cash and balances at central banks	84	73
Cash collateral and settlement balance assets	67,305	55,262
Loans and advances at amortised cost	22,062	20,473
Reverse repurchase agreements and other similar secured lending	7,964	2,134
Trading portfolio assets	11,464	9,049
Financial assets at fair value through the income statement	131,943	97,849
Derivative financial instruments	116,526	83,285
Financial assets at fair value through other comprehensive income	5,843	4,370
Other assets	224	322
Assets	363,415	272,817
Off-balance sheet
Contingent liabilities	5,501	8,043
Loan commitments	53,936	47,815
Total off-balance sheet	59,437	55,858
Manufacturing [member]
Off-balance sheet
Total	60,187	60,007
Manufacturing [member] | Credit risk [member]
On-balance sheet
Cash and balances at central banks	0	0
Cash collateral and settlement balance assets	375	516
Loans and advances at amortised cost	8,142	8,323
Reverse repurchase agreements and other similar secured lending	0	0
Trading portfolio assets	4,104	2,787
Financial assets at fair value through the income statement	608	634
Derivative financial instruments	4,126	2,049
Financial assets at fair value through other comprehensive income	1	0
Other assets	6	1
Assets	17,362	14,310
Off-balance sheet
Contingent liabilities	3,187	3,549
Loan commitments	39,638	42,148
Total off-balance sheet	42,825	45,697
Construction and Property [member]
Off-balance sheet
Total	50,768	50,054
Construction and Property [member] | Credit risk [member]
On-balance sheet
Cash and balances at central banks	0	0
Cash collateral and settlement balance assets	35	64
Loans and advances at amortised cost	26,125	24,403
Reverse repurchase agreements and other similar secured lending	0	0
Trading portfolio assets	516	1,053
Financial assets at fair value through the income statement	5,668	6,909
Derivative financial instruments	2,725	2,273
Financial assets at fair value through other comprehensive income	425	286
Other assets	12	5
Assets	35,506	34,993
Off-balance sheet
Contingent liabilities	1,260	703
Loan commitments	14,002	14,358
Total off-balance sheet	15,262	15,061
Government and central bank [member]
Off-balance sheet
Total	341,846	274,055
Government and central bank [member] | Credit risk [member]
On-balance sheet
Cash and balances at central banks	190,981	150,178
Cash collateral and settlement balance assets	13,946	9,251
Loans and advances at amortised cost	28,445	23,847
Reverse repurchase agreements and other similar secured lending	361	73
Trading portfolio assets	35,902	33,092
Financial assets at fair value through the income statement	5,530	5,353
Derivative financial instruments	11,649	7,811
Financial assets at fair value through other comprehensive income	51,955	40,763
Other assets	1	2
Assets	338,770	270,370
Off-balance sheet
Contingent liabilities	1,678	1,981
Loan commitments	1,398	1,704
Total off-balance sheet	3,076	3,685
Energy and water [member]
Off-balance sheet
Total	40,959	45,202
Energy and water [member] | Credit risk [member]
On-balance sheet
Cash and balances at central banks	0	0
Cash collateral and settlement balance assets	871	536
Loans and advances at amortised cost	4,722	5,346
Reverse repurchase agreements and other similar secured lending	0	0
Trading portfolio assets	3,052	2,996
Financial assets at fair value through the income statement	13	45
Derivative financial instruments	3,288	3,077
Financial assets at fair value through other comprehensive income	0	0
Other assets	10	7
Assets	11,956	12,007
Off-balance sheet
Contingent liabilities	3,223	3,318
Loan commitments	25,780	29,877
Total off-balance sheet	29,003	33,195
Wholesale and retail distribution and leisure [member]
Off-balance sheet
Total	33,969	27,271
Wholesale and retail distribution and leisure [member] | Credit risk [member]
On-balance sheet
Cash and balances at central banks	0	0
Cash collateral and settlement balance assets	30	51
Loans and advances at amortised cost	12,569	10,031
Reverse repurchase agreements and other similar secured lending	0	0
Trading portfolio assets	1,883	842
Financial assets at fair value through the income statement	64	0
Derivative financial instruments	1,235	562
Financial assets at fair value through other comprehensive income	0	0
Other assets	18	2
Assets	15,799	11,488
Off-balance sheet
Contingent liabilities	1,005	1,072
Loan commitments	17,165	14,711
Total off-balance sheet	18,170	15,783
Business and other services [member]
Off-balance sheet
Total	56,485	52,316
Business and other services [member] | Credit risk [member]
On-balance sheet
Cash and balances at central banks	6	0
Cash collateral and settlement balance assets	575	642
Loans and advances at amortised cost	19,538	17,125
Reverse repurchase agreements and other similar secured lending	0	0
Trading portfolio assets	2,625	3,158
Financial assets at fair value through the income statement	3,712	3,569
Derivative financial instruments	2,361	1,520
Financial assets at fair value through other comprehensive income	733	430
Other assets	98	109
Assets	29,648	26,553
Off-balance sheet
Contingent liabilities	2,283	2,831
Loan commitments	24,554	22,932
Total off-balance sheet	26,837	25,763
Home loans [member]
Off-balance sheet
Total	173,003	164,897
Home loans [member] | Credit risk [member]
On-balance sheet
Cash and balances at central banks	0	0
Cash collateral and settlement balance assets	0	0
Loans and advances at amortised cost	159,647	154,479
Reverse repurchase agreements and other similar secured lending	0	0
Trading portfolio assets	0	0
Financial assets at fair value through the income statement	971	358
Derivative financial instruments	0	0
Financial assets at fair value through other comprehensive income	0	0
Other assets	0	0
Assets	160,618	154,837
Off-balance sheet
Contingent liabilities	0	0
Loan commitments	12,385	10,060
Total off-balance sheet	12,385	10,060
Cards, unsecured loans and other personal lending [member]
Off-balance sheet
Total	161,308	180,202
Cards, unsecured loans and other personal lending [member] | Credit risk [member]
On-balance sheet
Cash and balances at central banks	0	0
Cash collateral and settlement balance assets	0	0
Loans and advances at amortised cost	41,312	55,232
Reverse repurchase agreements and other similar secured lending	0	0
Trading portfolio assets	0	0
Financial assets at fair value through the income statement	0	0
Derivative financial instruments	0	2
Financial assets at fair value through other comprehensive income	0	0
Other assets	34	18
Assets	41,346	55,252
Off-balance sheet
Contingent liabilities	155	109
Loan commitments	119,807	124,841
Total off-balance sheet	119,962	124,950
Other [member]
Off-balance sheet
Total	44,576	43,197
Other [member] | Credit risk [member]
On-balance sheet
Cash and balances at central banks	0	0
Cash collateral and settlement balance assets	244	335
Loans and advances at amortised cost	11,937	11,068
Reverse repurchase agreements and other similar secured lending	0	0
Trading portfolio assets	2,541	2,268
Financial assets at fair value through the income statement	198	127
Derivative financial instruments	4,769	3,334
Financial assets at fair value through other comprehensive income	141	282
Other assets	8	12
Assets	19,838	17,426
Off-balance sheet
Contingent liabilities	2,167	1,671
Loan commitments	22,571	24,100
Total off-balance sheet	£ 24,738	£ 25,771

Other disclosures - Risk Man_20

Other disclosures - Risk Management and Principal Risks - Credit risk concentrations by geography and industry (audited) (Narrative) (Details) - GBP (£) £ in Billions	Dec. 31, 2020	Dec. 31, 2019
Financial assets designated at fair value [member]
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	£ 9.5	£ 17.7

Other disclosures - Risk Man_21

Other disclosures - Risk Management and Principal Risks - Balance sheet credit quality (audited) (Details) - GBP (£) £ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
On-balance sheet
Cash collateral and settlement balances	£ 101,367	£ 83,256
Cash and balances at central banks	191,127	150,258	£ 177,069
Loans and advances at amortised cost	342,632	339,115
Reverse repurchase agreements and other similar secured lending	9,031	3,379
Trading portfolio assets	127,950	114,195
Financial assets at fair value through the income statement	175,151	133,086
Derivative financial instruments	302,446	229,236
Other assets	850	1,375
Total assets	1,349,514	1,140,229	£ 1,133,300
Off-balance sheet
Contingent liabilities	21,609	24,527
Total off-balance sheet	354,658	358,982
Debt securities [member]
On-balance sheet
Trading portfolio assets	56,482	52,739
Traded loans [member]
On-balance sheet
Trading portfolio assets	8,348	5,378
Internal credit grades [member]
On-balance sheet
Cash collateral and settlement balances	101,367	150,258
Cash and balances at central banks	191,127	83,256
Reverse repurchase agreements and other similar secured lending	9,031	3,379
Trading portfolio assets	64,830	58,117
Financial assets at fair value through the income statement	170,531	125,591
Derivative financial instruments	302,446	229,236
Financial assets measured at fair value through other comprehensive income	77,927	64,727
Other assets	850	1,375
Total assets	£ 1,260,741	£ 1,055,054
On-balance sheet, percentage
Cash and balances at central banks, percentage	100.00%	100.00%
Cash collateral and settlement balance, percentage	100.00%	100.00%
Reverse repurchase agreements, percentage	100.00%	100.00%
Trading portfolio assets, percentage	100.00%	100.00%
Financial assets at fair value through the income statement, percentage	100.00%	100.00%
Derivative financial instruments, percentage	100.00%	100.00%
Financial assets at fair value through other comprehensive income, percentage	100.00%	100.00%
Other assets, percentage	100.00%	100.00%
Total assets, percentage	100.00%	100.00%
Internal credit grades [member] | 0.0 to less than 0.60% [member]
On-balance sheet
Cash collateral and settlement balances	£ 90,633	£ 150,258
Cash and balances at central banks	191,127	73,122
Reverse repurchase agreements and other similar secured lending	9,019	3,290
Trading portfolio assets	52,099	49,981
Financial assets at fair value through the income statement	113,299	82,505
Derivative financial instruments	282,617	216,103
Financial assets measured at fair value through other comprehensive income	77,919	64,727
Other assets	778	1,242
Total assets	£ 1,090,077	£ 906,101
On-balance sheet, percentage
Cash and balances at central banks, percentage	100.00%	100.00%
Cash collateral and settlement balance, percentage	89.00%	88.00%
Reverse repurchase agreements, percentage	100.00%	97.00%
Trading portfolio assets, percentage	81.00%	86.00%
Financial assets at fair value through the income statement, percentage	67.00%	66.00%
Derivative financial instruments, percentage	94.00%	94.00%
Financial assets at fair value through other comprehensive income, percentage	100.00%	100.00%
Other assets, percentage	92.00%	90.00%
Total assets, percentage	87.00%	86.00%
Internal credit grades [member] | 0.60 to less than 11.35% [member]
On-balance sheet
Cash collateral and settlement balances	£ 10,725	£ 0
Cash and balances at central banks	0	10,134
Reverse repurchase agreements and other similar secured lending	12	89
Trading portfolio assets	9,978	6,698
Financial assets at fair value through the income statement	56,469	42,644
Derivative financial instruments	19,352	13,012
Financial assets measured at fair value through other comprehensive income	8	0
Other assets	68	133
Total assets	£ 156,887	£ 138,060
On-balance sheet, percentage
Cash and balances at central banks, percentage	0.00%	0.00%
Cash collateral and settlement balance, percentage	11.00%	12.00%
Reverse repurchase agreements, percentage	0.00%	3.00%
Trading portfolio assets, percentage	15.00%	12.00%
Financial assets at fair value through the income statement, percentage	33.00%	34.00%
Derivative financial instruments, percentage	6.00%	6.00%
Financial assets at fair value through other comprehensive income, percentage	0.00%	0.00%
Other assets, percentage	8.00%	10.00%
Total assets, percentage	12.00%	13.00%
Internal credit grades [member] | 11.35% to 100%
On-balance sheet
Cash collateral and settlement balances	£ 9	£ 0
Cash and balances at central banks	0	0
Reverse repurchase agreements and other similar secured lending	0	0
Trading portfolio assets	2,753	1,438
Financial assets at fair value through the income statement	763	442
Derivative financial instruments	477	121
Financial assets measured at fair value through other comprehensive income	0	0
Other assets	4	0
Total assets	£ 13,777	£ 10,893
On-balance sheet, percentage
Cash and balances at central banks, percentage	0.00%	0.00%
Cash collateral and settlement balance, percentage	0.00%	0.00%
Reverse repurchase agreements, percentage	0.00%	0.00%
Trading portfolio assets, percentage	4.00%	2.00%
Financial assets at fair value through the income statement, percentage	0.00%	0.00%
Derivative financial instruments, percentage	0.00%	0.00%
Financial assets at fair value through other comprehensive income, percentage	0.00%	0.00%
Other assets, percentage	0.00%	0.00%
Total assets, percentage	1.00%	1.00%
Internal credit grades [member] | Financial assets at amortised cost, category [member]
On-balance sheet
Loans and advances at amortised cost	£ 342,632	£ 339,115
On-balance sheet, percentage
Loans and advances at amortised cost, percentage	100.00%	100.00%
Internal credit grades [member] | Financial assets at amortised cost, category [member] | 0.0 to less than 0.60% [member]
On-balance sheet
Loans and advances at amortised cost	£ 272,586	£ 264,873
On-balance sheet, percentage
Loans and advances at amortised cost, percentage	79.00%	78.00%
Internal credit grades [member] | Financial assets at amortised cost, category [member] | 0.60 to less than 11.35% [member]
On-balance sheet
Loans and advances at amortised cost	£ 60,275	£ 65,350
On-balance sheet, percentage
Loans and advances at amortised cost, percentage	18.00%	19.00%
Internal credit grades [member] | Financial assets at amortised cost, category [member] | 11.35% to 100%
On-balance sheet
Loans and advances at amortised cost	£ 9,771	£ 8,892
On-balance sheet, percentage
Loans and advances at amortised cost, percentage	3.00%	3.00%
Internal credit grades [member] | Home loans [member]
On-balance sheet
Loans and advances at amortised cost	£ 159,647	£ 154,479
On-balance sheet, percentage
Loans and advances at amortised cost, percentage	100.00%	100.00%
Internal credit grades [member] | Home loans [member] | 0.0 to less than 0.60% [member]
On-balance sheet
Loans and advances at amortised cost	£ 150,748	£ 146,269
On-balance sheet, percentage
Loans and advances at amortised cost, percentage	94.00%	94.00%
Internal credit grades [member] | Home loans [member] | 0.60 to less than 11.35% [member]
On-balance sheet
Loans and advances at amortised cost	£ 6,310	£ 5,775
On-balance sheet, percentage
Loans and advances at amortised cost, percentage	4.00%	4.00%
Internal credit grades [member] | Home loans [member] | 11.35% to 100%
On-balance sheet
Loans and advances at amortised cost	£ 2,589	£ 2,435
On-balance sheet, percentage
Loans and advances at amortised cost, percentage	2.00%	2.00%
Internal credit grades [member] | Credit cards, unsecured loans and other retail lending [member]
On-balance sheet
Loans and advances at amortised cost	£ 40,813	£ 55,296
On-balance sheet, percentage
Loans and advances at amortised cost, percentage	100.00%	100.00%
Internal credit grades [member] | Credit cards, unsecured loans and other retail lending [member] | 0.0 to less than 0.60% [member]
On-balance sheet
Loans and advances at amortised cost	£ 15,870	£ 20,750
On-balance sheet, percentage
Loans and advances at amortised cost, percentage	39.00%	38.00%
Internal credit grades [member] | Credit cards, unsecured loans and other retail lending [member] | 0.60 to less than 11.35% [member]
On-balance sheet
Loans and advances at amortised cost	£ 22,427	£ 31,425
On-balance sheet, percentage
Loans and advances at amortised cost, percentage	55.00%	56.00%
Internal credit grades [member] | Credit cards, unsecured loans and other retail lending [member] | 11.35% to 100%
On-balance sheet
Loans and advances at amortised cost	£ 2,516	£ 3,121
On-balance sheet, percentage
Loans and advances at amortised cost, percentage	6.00%	6.00%
Internal credit grades [member] | Wholesale loans [member]
On-balance sheet
Loans and advances at amortised cost	£ 142,172	£ 129,340
On-balance sheet, percentage
Loans and advances at amortised cost, percentage	100.00%	100.00%
Internal credit grades [member] | Wholesale loans [member] | 0.0 to less than 0.60% [member]
On-balance sheet
Loans and advances at amortised cost	£ 105,968	£ 97,854
On-balance sheet, percentage
Loans and advances at amortised cost, percentage	75.00%	75.00%
Internal credit grades [member] | Wholesale loans [member] | 0.60 to less than 11.35% [member]
On-balance sheet
Loans and advances at amortised cost	£ 31,538	£ 28,150
On-balance sheet, percentage
Loans and advances at amortised cost, percentage	22.00%	22.00%
Internal credit grades [member] | Wholesale loans [member] | 11.35% to 100%
On-balance sheet
Loans and advances at amortised cost	£ 4,666	£ 3,336
On-balance sheet, percentage
Loans and advances at amortised cost, percentage	3.00%	3.00%
Internal credit grades [member] | Loans and advances [member]
On-balance sheet
Financial assets at fair value through the income statement	£ 30,879	£ 22,692
On-balance sheet, percentage
Financial assets at fair value through the income statement, percentage	100.00%	100.00%
Internal credit grades [member] | Loans and advances [member] | 0.0 to less than 0.60% [member]
On-balance sheet
Financial assets at fair value through the income statement	£ 16,467	£ 14,467
On-balance sheet, percentage
Financial assets at fair value through the income statement, percentage	53.00%	64.00%
Internal credit grades [member] | Loans and advances [member] | 0.60 to less than 11.35% [member]
On-balance sheet
Financial assets at fair value through the income statement	£ 14,369	£ 7,993
On-balance sheet, percentage
Financial assets at fair value through the income statement, percentage	47.00%	35.00%
Internal credit grades [member] | Loans and advances [member] | 11.35% to 100%
On-balance sheet
Financial assets at fair value through the income statement	£ 43	£ 232
On-balance sheet, percentage
Financial assets at fair value through the income statement, percentage	0.00%	1.00%
Internal credit grades [member] | Reverse repurchase agreements [member]
On-balance sheet
Financial assets at fair value through the income statement	£ 137,616	£ 96,887
On-balance sheet, percentage
Financial assets at fair value through the income statement, percentage	100.00%	100.00%
Internal credit grades [member] | Reverse repurchase agreements [member] | 0.0 to less than 0.60% [member]
On-balance sheet
Financial assets at fair value through the income statement	£ 95,376	£ 62,475
On-balance sheet, percentage
Financial assets at fair value through the income statement, percentage	70.00%	65.00%
Internal credit grades [member] | Reverse repurchase agreements [member] | 0.60 to less than 11.35% [member]
On-balance sheet
Financial assets at fair value through the income statement	£ 41,566	£ 34,232
On-balance sheet, percentage
Financial assets at fair value through the income statement, percentage	30.00%	35.00%
Internal credit grades [member] | Reverse repurchase agreements [member] | 11.35% to 100%
On-balance sheet
Financial assets at fair value through the income statement	£ 674	£ 180
On-balance sheet, percentage
Financial assets at fair value through the income statement, percentage	0.00%	0.00%
Internal credit grades [member] | Other financial assets [member]
On-balance sheet
Financial assets at fair value through the income statement	£ 343	£ 763
On-balance sheet, percentage
Financial assets at fair value through the income statement, percentage	100.00%	100.00%
Internal credit grades [member] | Other financial assets [member] | 0.0 to less than 0.60% [member]
On-balance sheet
Financial assets at fair value through the income statement	£ 330	£ 757
On-balance sheet, percentage
Financial assets at fair value through the income statement, percentage	96.00%	99.00%
Internal credit grades [member] | Other financial assets [member] | 0.60 to less than 11.35% [member]
On-balance sheet
Financial assets at fair value through the income statement	£ 13	£ 6
On-balance sheet, percentage
Financial assets at fair value through the income statement, percentage	4.00%	1.00%
Internal credit grades [member] | Other financial assets [member] | 11.35% to 100%
On-balance sheet
Financial assets at fair value through the income statement	£ 0	£ 0
On-balance sheet, percentage
Financial assets at fair value through the income statement, percentage	0.00%	0.00%
Internal credit grades [member] | Debt securities [member]
On-balance sheet
Trading portfolio assets	£ 56,482	£ 52,739
Financial assets at fair value through the income statement	£ 1,693	£ 5,249
On-balance sheet, percentage
Trading portfolio assets, percentage	100.00%	100.00%
Financial assets at fair value through the income statement, percentage	100.00%	100.00%
Internal credit grades [member] | Debt securities [member] | 0.0 to less than 0.60% [member]
On-balance sheet
Trading portfolio assets	£ 51,395	£ 49,117
Financial assets at fair value through the income statement	£ 1,126	£ 4,806
On-balance sheet, percentage
Trading portfolio assets, percentage	91.00%	93.00%
Financial assets at fair value through the income statement, percentage	66.00%	91.00%
Internal credit grades [member] | Debt securities [member] | 0.60 to less than 11.35% [member]
On-balance sheet
Trading portfolio assets	£ 4,871	£ 3,479
Financial assets at fair value through the income statement	£ 521	£ 413
On-balance sheet, percentage
Trading portfolio assets, percentage	9.00%	7.00%
Financial assets at fair value through the income statement, percentage	31.00%	8.00%
Internal credit grades [member] | Debt securities [member] | 11.35% to 100%
On-balance sheet
Trading portfolio assets	£ 216	£ 143
Financial assets at fair value through the income statement	£ 46	£ 30
On-balance sheet, percentage
Trading portfolio assets, percentage	0.00%	0.00%
Financial assets at fair value through the income statement, percentage	3.00%	1.00%
Internal credit grades [member] | Traded loans [member]
On-balance sheet
Trading portfolio assets	£ 8,348	£ 5,378
On-balance sheet, percentage
Trading portfolio assets, percentage	100.00%	100.00%
Internal credit grades [member] | Traded loans [member] | 0.0 to less than 0.60% [member]
On-balance sheet
Trading portfolio assets	£ 704	£ 864
On-balance sheet, percentage
Trading portfolio assets, percentage	9.00%	16.00%
Internal credit grades [member] | Traded loans [member] | 0.60 to less than 11.35% [member]
On-balance sheet
Trading portfolio assets	£ 5,107	£ 3,219
On-balance sheet, percentage
Trading portfolio assets, percentage	61.00%	60.00%
Internal credit grades [member] | Traded loans [member] | 11.35% to 100%
On-balance sheet
Trading portfolio assets	£ 2,537	£ 1,295
On-balance sheet, percentage
Trading portfolio assets, percentage	30.00%	24.00%

Other disclosures - Risk Man_22

Other disclosures - Risk Management and Principal Risks - Credit exposures by internal PD grade (audited) (Details) - GBP (£) £ in Millions	Dec. 31, 2020	Dec. 31, 2019
Loans and advances [member] | Financial assets at amortised cost [member]
Disclosure of internal credit grades [line items]
Credit exposure	£ 342,632	£ 339,115
ECL coverage	2.40%	1.80%
Loans and advances [member] | Financial assets at amortised cost [member] | Gross exposure [member] | ECL [member]
Disclosure of internal credit grades [line items]
Credit exposure	£ 350,967	£ 345,423
Loans and advances [member] | Financial assets at amortised cost [member] | Gross exposure [member] | Stage 1 [member]
Disclosure of internal credit grades [line items]
Credit exposure	290,964	299,266
Loans and advances [member] | Financial assets at amortised cost [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of internal credit grades [line items]
Credit exposure	51,006	38,234
Loans and advances [member] | Financial assets at amortised cost [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of internal credit grades [line items]
Credit exposure	8,997	7,923
Loans and advances [member] | Financial assets at amortised cost [member] | ECL | ECL [member]
Disclosure of internal credit grades [line items]
Credit exposure	8,335	6,308
Loans and advances [member] | Financial assets at amortised cost [member] | ECL | Stage 1 [member]
Disclosure of internal credit grades [line items]
Credit exposure	1,033	707
Loans and advances [member] | Financial assets at amortised cost [member] | ECL | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of internal credit grades [line items]
Credit exposure	3,564	2,373
Loans and advances [member] | Financial assets at amortised cost [member] | ECL | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of internal credit grades [line items]
Credit exposure	3,738	3,228
Contingent liabilities [member]
Disclosure of internal credit grades [line items]
Credit exposure	£ 21,098	£ 24,395
ECL coverage	1.30%	0.40%
Contingent liabilities [member] | Gross exposure [member] | ECL [member]
Disclosure of internal credit grades [line items]
Credit exposure	£ 21,380	£ 24,484
Contingent liabilities [member] | Gross exposure [member] | Stage 1 [member]
Disclosure of internal credit grades [line items]
Credit exposure	17,256	22,380
Contingent liabilities [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of internal credit grades [line items]
Credit exposure	3,470	1,749
Contingent liabilities [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of internal credit grades [line items]
Credit exposure	654	355
Contingent liabilities [member] | ECL | ECL [member]
Disclosure of internal credit grades [line items]
Credit exposure	282	89
Contingent liabilities [member] | ECL | Stage 1 [member]
Disclosure of internal credit grades [line items]
Credit exposure	44	27
Contingent liabilities [member] | ECL | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of internal credit grades [line items]
Credit exposure	228	57
Contingent liabilities [member] | ECL | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of internal credit grades [line items]
Credit exposure	10	5
Loan commitments [member]
Disclosure of internal credit grades [line items]
Credit exposure	£ 322,998	£ 316,543
ECL coverage	0.20%	0.10%
Loan commitments [member] | Gross exposure [member] | ECL [member]
Disclosure of internal credit grades [line items]
Credit exposure	£ 323,780	£ 316,776
Loan commitments [member] | Gross exposure [member] | Stage 1 [member]
Disclosure of internal credit grades [line items]
Credit exposure	272,683	298,760
Loan commitments [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of internal credit grades [line items]
Credit exposure	49,421	17,436
Loan commitments [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of internal credit grades [line items]
Credit exposure	1,676	580
Loan commitments [member] | ECL | ECL [member]
Disclosure of internal credit grades [line items]
Credit exposure	782	233
Loan commitments [member] | ECL | Stage 1 [member]
Disclosure of internal credit grades [line items]
Credit exposure	212	70
Loan commitments [member] | ECL | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of internal credit grades [line items]
Credit exposure	530	113
Loan commitments [member] | ECL | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of internal credit grades [line items]
Credit exposure	40	50
100% | Financial assets at amortised cost [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of internal credit grades [line items]
Credit exposure	3,738	3,228
100% | Loans and advances [member] | Financial assets at amortised cost [member]
Disclosure of internal credit grades [line items]
Credit exposure	£ 5,259	£ 4,695
ECL coverage	41.50%	40.70%
100% | Loans and advances [member] | Financial assets at amortised cost [member] | Gross exposure [member] | ECL [member]
Disclosure of internal credit grades [line items]
Credit exposure	£ 8,997	£ 7,923
100% | Loans and advances [member] | Financial assets at amortised cost [member] | Gross exposure [member] | Stage 1 [member]
Disclosure of internal credit grades [line items]
Credit exposure	290,964	299,266
100% | Loans and advances [member] | Financial assets at amortised cost [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of internal credit grades [line items]
Credit exposure	0	0
100% | Loans and advances [member] | Financial assets at amortised cost [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of internal credit grades [line items]
Credit exposure	8,997	7,923
100% | Loans and advances [member] | Financial assets at amortised cost [member] | ECL | ECL [member]
Disclosure of internal credit grades [line items]
Credit exposure	3,738	3,228
100% | Loans and advances [member] | Financial assets at amortised cost [member] | ECL | Stage 1 [member]
Disclosure of internal credit grades [line items]
Credit exposure	1,033	707
100% | Loans and advances [member] | Financial assets at amortised cost [member] | ECL | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of internal credit grades [line items]
Credit exposure	0	0
100% | Loans and advances [member] | Financial assets at amortised cost [member] | ECL | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of internal credit grades [line items]
Credit exposure	0	0
100% | Contingent liabilities [member]
Disclosure of internal credit grades [line items]
Credit exposure	£ 644	£ 350
ECL coverage	1.50%	1.40%
100% | Contingent liabilities [member] | Gross exposure [member] | ECL [member]
Disclosure of internal credit grades [line items]
Credit exposure	£ 654	£ 355
100% | Contingent liabilities [member] | Gross exposure [member] | Stage 1 [member]
Disclosure of internal credit grades [line items]
Credit exposure	0	0
100% | Contingent liabilities [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of internal credit grades [line items]
Credit exposure	0	0
100% | Contingent liabilities [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of internal credit grades [line items]
Credit exposure	654	355
100% | Contingent liabilities [member] | ECL | ECL [member]
Disclosure of internal credit grades [line items]
Credit exposure	10	5
100% | Contingent liabilities [member] | ECL | Stage 1 [member]
Disclosure of internal credit grades [line items]
Credit exposure	0	0
100% | Contingent liabilities [member] | ECL | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of internal credit grades [line items]
Credit exposure	0	0
100% | Contingent liabilities [member] | ECL | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of internal credit grades [line items]
Credit exposure	10	5
100% | Loan commitments [member]
Disclosure of internal credit grades [line items]
Credit exposure	£ 1,636	£ 530
ECL coverage	2.40%	8.60%
100% | Loan commitments [member] | Gross exposure [member] | ECL [member]
Disclosure of internal credit grades [line items]
Credit exposure	£ 1,676	£ 580
100% | Loan commitments [member] | Gross exposure [member] | Stage 1 [member]
Disclosure of internal credit grades [line items]
Credit exposure	0	0
100% | Loan commitments [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of internal credit grades [line items]
Credit exposure	0	0
100% | Loan commitments [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of internal credit grades [line items]
Credit exposure	1,676	580
100% | Loan commitments [member] | ECL | ECL [member]
Disclosure of internal credit grades [line items]
Credit exposure	40	50
100% | Loan commitments [member] | ECL | Stage 1 [member]
Disclosure of internal credit grades [line items]
Credit exposure	0	0
100% | Loan commitments [member] | ECL | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of internal credit grades [line items]
Credit exposure	0	0
100% | Loan commitments [member] | ECL | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of internal credit grades [line items]
Credit exposure	40	50
Strong (including investment grade) [Member] | 0.0 to less than 0.05% | Loans and advances [member] | Financial assets at amortised cost [member]
Disclosure of internal credit grades [line items]
Credit exposure	£ 85,366	£ 93,582
ECL coverage	0.00%	0.00%
Strong (including investment grade) [Member] | 0.0 to less than 0.05% | Loans and advances [member] | Financial assets at amortised cost [member] | Gross exposure [member] | ECL [member]
Disclosure of internal credit grades [line items]
Credit exposure	£ 85,407	£ 93,608
Strong (including investment grade) [Member] | 0.0 to less than 0.05% | Loans and advances [member] | Financial assets at amortised cost [member] | Gross exposure [member] | Stage 1 [member]
Disclosure of internal credit grades [line items]
Credit exposure	82,312	91,993
Strong (including investment grade) [Member] | 0.0 to less than 0.05% | Loans and advances [member] | Financial assets at amortised cost [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of internal credit grades [line items]
Credit exposure	3,095	1,615
Strong (including investment grade) [Member] | 0.0 to less than 0.05% | Loans and advances [member] | Financial assets at amortised cost [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of internal credit grades [line items]
Credit exposure	0	0
Strong (including investment grade) [Member] | 0.0 to less than 0.05% | Loans and advances [member] | Financial assets at amortised cost [member] | ECL | ECL [member]
Disclosure of internal credit grades [line items]
Credit exposure	41	26
Strong (including investment grade) [Member] | 0.0 to less than 0.05% | Loans and advances [member] | Financial assets at amortised cost [member] | ECL | Stage 1 [member]
Disclosure of internal credit grades [line items]
Credit exposure	6	13
Strong (including investment grade) [Member] | 0.0 to less than 0.05% | Loans and advances [member] | Financial assets at amortised cost [member] | ECL | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of internal credit grades [line items]
Credit exposure	6	13
Strong (including investment grade) [Member] | 0.0 to less than 0.05% | Loans and advances [member] | Financial assets at amortised cost [member] | ECL | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of internal credit grades [line items]
Credit exposure	35	13
Strong (including investment grade) [Member] | 0.0 to less than 0.05% | Contingent liabilities [member]
Disclosure of internal credit grades [line items]
Credit exposure	£ 6,366	£ 7,062
ECL coverage	0.00%	0.00%
Strong (including investment grade) [Member] | 0.0 to less than 0.05% | Contingent liabilities [member] | Gross exposure [member] | ECL [member]
Disclosure of internal credit grades [line items]
Credit exposure	£ 6,367	£ 7,065
Strong (including investment grade) [Member] | 0.0 to less than 0.05% | Contingent liabilities [member] | Gross exposure [member] | Stage 1 [member]
Disclosure of internal credit grades [line items]
Credit exposure	6,178	6,947
Strong (including investment grade) [Member] | 0.0 to less than 0.05% | Contingent liabilities [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of internal credit grades [line items]
Credit exposure	189	118
Strong (including investment grade) [Member] | 0.0 to less than 0.05% | Contingent liabilities [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of internal credit grades [line items]
Credit exposure	0	0
Strong (including investment grade) [Member] | 0.0 to less than 0.05% | Contingent liabilities [member] | ECL | ECL [member]
Disclosure of internal credit grades [line items]
Credit exposure	1	3
Strong (including investment grade) [Member] | 0.0 to less than 0.05% | Contingent liabilities [member] | ECL | Stage 1 [member]
Disclosure of internal credit grades [line items]
Credit exposure	1	3
Strong (including investment grade) [Member] | 0.0 to less than 0.05% | Contingent liabilities [member] | ECL | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of internal credit grades [line items]
Credit exposure	0	0
Strong (including investment grade) [Member] | 0.0 to less than 0.05% | Contingent liabilities [member] | ECL | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of internal credit grades [line items]
Credit exposure	0	0
Strong (including investment grade) [Member] | 0.0 to less than 0.05% | Loan commitments [member]
Disclosure of internal credit grades [line items]
Credit exposure	£ 66,044	£ 86,930
ECL coverage	0.00%	0.00%
Strong (including investment grade) [Member] | 0.0 to less than 0.05% | Loan commitments [member] | Gross exposure [member] | ECL [member]
Disclosure of internal credit grades [line items]
Credit exposure	£ 66,050	£ 86,933
Strong (including investment grade) [Member] | 0.0 to less than 0.05% | Loan commitments [member] | Gross exposure [member] | Stage 1 [member]
Disclosure of internal credit grades [line items]
Credit exposure	60,525	85,908
Strong (including investment grade) [Member] | 0.0 to less than 0.05% | Loan commitments [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of internal credit grades [line items]
Credit exposure	5,525	1,025
Strong (including investment grade) [Member] | 0.0 to less than 0.05% | Loan commitments [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of internal credit grades [line items]
Credit exposure	0	0
Strong (including investment grade) [Member] | 0.0 to less than 0.05% | Loan commitments [member] | ECL | ECL [member]
Disclosure of internal credit grades [line items]
Credit exposure	6	3
Strong (including investment grade) [Member] | 0.0 to less than 0.05% | Loan commitments [member] | ECL | Stage 1 [member]
Disclosure of internal credit grades [line items]
Credit exposure	4	2
Strong (including investment grade) [Member] | 0.0 to less than 0.05% | Loan commitments [member] | ECL | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of internal credit grades [line items]
Credit exposure	2	1
Strong (including investment grade) [Member] | 0.0 to less than 0.05% | Loan commitments [member] | ECL | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of internal credit grades [line items]
Credit exposure	0	0
Strong (including investment grade) [Member] | 0.05 to less than 0.15% | Loans and advances [member] | Financial assets at amortised cost [member]
Disclosure of internal credit grades [line items]
Credit exposure	£ 110,965	£ 100,348
ECL coverage	0.10%	0.00%
Strong (including investment grade) [Member] | 0.05 to less than 0.15% | Loans and advances [member] | Financial assets at amortised cost [member] | Gross exposure [member] | ECL [member]
Disclosure of internal credit grades [line items]
Credit exposure	£ 111,024	£ 100,372
Strong (including investment grade) [Member] | 0.05 to less than 0.15% | Loans and advances [member] | Financial assets at amortised cost [member] | Gross exposure [member] | Stage 1 [member]
Disclosure of internal credit grades [line items]
Credit exposure	101,309	92,668
Strong (including investment grade) [Member] | 0.05 to less than 0.15% | Loans and advances [member] | Financial assets at amortised cost [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of internal credit grades [line items]
Credit exposure	9,715	7,704
Strong (including investment grade) [Member] | 0.05 to less than 0.15% | Loans and advances [member] | Financial assets at amortised cost [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of internal credit grades [line items]
Credit exposure	0	0
Strong (including investment grade) [Member] | 0.05 to less than 0.15% | Loans and advances [member] | Financial assets at amortised cost [member] | ECL | ECL [member]
Disclosure of internal credit grades [line items]
Credit exposure	59	24
Strong (including investment grade) [Member] | 0.05 to less than 0.15% | Loans and advances [member] | Financial assets at amortised cost [member] | ECL | Stage 1 [member]
Disclosure of internal credit grades [line items]
Credit exposure	34	12
Strong (including investment grade) [Member] | 0.05 to less than 0.15% | Loans and advances [member] | Financial assets at amortised cost [member] | ECL | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of internal credit grades [line items]
Credit exposure	34	12
Strong (including investment grade) [Member] | 0.05 to less than 0.15% | Loans and advances [member] | Financial assets at amortised cost [member] | ECL | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of internal credit grades [line items]
Credit exposure	25	12
Strong (including investment grade) [Member] | 0.05 to less than 0.15% | Contingent liabilities [member]
Disclosure of internal credit grades [line items]
Credit exposure	£ 3,188	£ 4,238
ECL coverage	0.20%	0.00%
Strong (including investment grade) [Member] | 0.05 to less than 0.15% | Contingent liabilities [member] | Gross exposure [member] | ECL [member]
Disclosure of internal credit grades [line items]
Credit exposure	£ 3,193	£ 4,239
Strong (including investment grade) [Member] | 0.05 to less than 0.15% | Contingent liabilities [member] | Gross exposure [member] | Stage 1 [member]
Disclosure of internal credit grades [line items]
Credit exposure	2,765	4,199
Strong (including investment grade) [Member] | 0.05 to less than 0.15% | Contingent liabilities [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of internal credit grades [line items]
Credit exposure	428	40
Strong (including investment grade) [Member] | 0.05 to less than 0.15% | Contingent liabilities [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of internal credit grades [line items]
Credit exposure	0	0
Strong (including investment grade) [Member] | 0.05 to less than 0.15% | Contingent liabilities [member] | ECL | ECL [member]
Disclosure of internal credit grades [line items]
Credit exposure	5	1
Strong (including investment grade) [Member] | 0.05 to less than 0.15% | Contingent liabilities [member] | ECL | Stage 1 [member]
Disclosure of internal credit grades [line items]
Credit exposure	3	1
Strong (including investment grade) [Member] | 0.05 to less than 0.15% | Contingent liabilities [member] | ECL | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of internal credit grades [line items]
Credit exposure	2	0
Strong (including investment grade) [Member] | 0.05 to less than 0.15% | Contingent liabilities [member] | ECL | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of internal credit grades [line items]
Credit exposure	0	0
Strong (including investment grade) [Member] | 0.05 to less than 0.15% | Loan commitments [member]
Disclosure of internal credit grades [line items]
Credit exposure	£ 81,154	£ 71,995
ECL coverage	0.00%	0.00%
Strong (including investment grade) [Member] | 0.05 to less than 0.15% | Loan commitments [member] | Gross exposure [member] | ECL [member]
Disclosure of internal credit grades [line items]
Credit exposure	£ 81,182	£ 72,001
Strong (including investment grade) [Member] | 0.05 to less than 0.15% | Loan commitments [member] | Gross exposure [member] | Stage 1 [member]
Disclosure of internal credit grades [line items]
Credit exposure	74,860	70,112
Strong (including investment grade) [Member] | 0.05 to less than 0.15% | Loan commitments [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of internal credit grades [line items]
Credit exposure	6,322	1,889
Strong (including investment grade) [Member] | 0.05 to less than 0.15% | Loan commitments [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of internal credit grades [line items]
Credit exposure	0	0
Strong (including investment grade) [Member] | 0.05 to less than 0.15% | Loan commitments [member] | ECL | ECL [member]
Disclosure of internal credit grades [line items]
Credit exposure	28	6
Strong (including investment grade) [Member] | 0.05 to less than 0.15% | Loan commitments [member] | ECL | Stage 1 [member]
Disclosure of internal credit grades [line items]
Credit exposure	12	5
Strong (including investment grade) [Member] | 0.05 to less than 0.15% | Loan commitments [member] | ECL | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of internal credit grades [line items]
Credit exposure	16	1
Strong (including investment grade) [Member] | 0.05 to less than 0.15% | Loan commitments [member] | ECL | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of internal credit grades [line items]
Credit exposure	0	0
Strong (including investment grade) [Member] | 0.15 to less than 0.30% | Loans and advances [member] | Financial assets at amortised cost [member]
Disclosure of internal credit grades [line items]
Credit exposure	£ 36,849	£ 33,603
ECL coverage	0.30%	0.10%
Strong (including investment grade) [Member] | 0.15 to less than 0.30% | Loans and advances [member] | Financial assets at amortised cost [member] | Gross exposure [member] | ECL [member]
Disclosure of internal credit grades [line items]
Credit exposure	£ 36,960	£ 33,631
Strong (including investment grade) [Member] | 0.15 to less than 0.30% | Loans and advances [member] | Financial assets at amortised cost [member] | Gross exposure [member] | Stage 1 [member]
Disclosure of internal credit grades [line items]
Credit exposure	30,697	29,187
Strong (including investment grade) [Member] | 0.15 to less than 0.30% | Loans and advances [member] | Financial assets at amortised cost [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of internal credit grades [line items]
Credit exposure	6,263	4,444
Strong (including investment grade) [Member] | 0.15 to less than 0.30% | Loans and advances [member] | Financial assets at amortised cost [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of internal credit grades [line items]
Credit exposure	0	0
Strong (including investment grade) [Member] | 0.15 to less than 0.30% | Loans and advances [member] | Financial assets at amortised cost [member] | ECL | ECL [member]
Disclosure of internal credit grades [line items]
Credit exposure	111	28
Strong (including investment grade) [Member] | 0.15 to less than 0.30% | Loans and advances [member] | Financial assets at amortised cost [member] | ECL | Stage 1 [member]
Disclosure of internal credit grades [line items]
Credit exposure	47	23
Strong (including investment grade) [Member] | 0.15 to less than 0.30% | Loans and advances [member] | Financial assets at amortised cost [member] | ECL | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of internal credit grades [line items]
Credit exposure	47	23
Strong (including investment grade) [Member] | 0.15 to less than 0.30% | Loans and advances [member] | Financial assets at amortised cost [member] | ECL | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of internal credit grades [line items]
Credit exposure	64	5
Strong (including investment grade) [Member] | 0.15 to less than 0.30% | Contingent liabilities [member]
Disclosure of internal credit grades [line items]
Credit exposure	£ 1,627	£ 3,055
ECL coverage	0.40%	0.00%
Strong (including investment grade) [Member] | 0.15 to less than 0.30% | Contingent liabilities [member] | Gross exposure [member] | ECL [member]
Disclosure of internal credit grades [line items]
Credit exposure	£ 1,633	£ 3,056
Strong (including investment grade) [Member] | 0.15 to less than 0.30% | Contingent liabilities [member] | Gross exposure [member] | Stage 1 [member]
Disclosure of internal credit grades [line items]
Credit exposure	1,468	2,953
Strong (including investment grade) [Member] | 0.15 to less than 0.30% | Contingent liabilities [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of internal credit grades [line items]
Credit exposure	165	103
Strong (including investment grade) [Member] | 0.15 to less than 0.30% | Contingent liabilities [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of internal credit grades [line items]
Credit exposure	0	0
Strong (including investment grade) [Member] | 0.15 to less than 0.30% | Contingent liabilities [member] | ECL | ECL [member]
Disclosure of internal credit grades [line items]
Credit exposure	6	1
Strong (including investment grade) [Member] | 0.15 to less than 0.30% | Contingent liabilities [member] | ECL | Stage 1 [member]
Disclosure of internal credit grades [line items]
Credit exposure	3	1
Strong (including investment grade) [Member] | 0.15 to less than 0.30% | Contingent liabilities [member] | ECL | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of internal credit grades [line items]
Credit exposure	3	0
Strong (including investment grade) [Member] | 0.15 to less than 0.30% | Contingent liabilities [member] | ECL | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of internal credit grades [line items]
Credit exposure	0	0
Strong (including investment grade) [Member] | 0.15 to less than 0.30% | Loan commitments [member]
Disclosure of internal credit grades [line items]
Credit exposure	£ 57,910	£ 54,350
ECL coverage	0.10%	0.00%
Strong (including investment grade) [Member] | 0.15 to less than 0.30% | Loan commitments [member] | Gross exposure [member] | ECL [member]
Disclosure of internal credit grades [line items]
Credit exposure	£ 57,974	£ 54,359
Strong (including investment grade) [Member] | 0.15 to less than 0.30% | Loan commitments [member] | Gross exposure [member] | Stage 1 [member]
Disclosure of internal credit grades [line items]
Credit exposure	51,255	53,340
Strong (including investment grade) [Member] | 0.15 to less than 0.30% | Loan commitments [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of internal credit grades [line items]
Credit exposure	6,719	1,019
Strong (including investment grade) [Member] | 0.15 to less than 0.30% | Loan commitments [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of internal credit grades [line items]
Credit exposure	0	0
Strong (including investment grade) [Member] | 0.15 to less than 0.30% | Loan commitments [member] | ECL | ECL [member]
Disclosure of internal credit grades [line items]
Credit exposure	64	9
Strong (including investment grade) [Member] | 0.15 to less than 0.30% | Loan commitments [member] | ECL | Stage 1 [member]
Disclosure of internal credit grades [line items]
Credit exposure	17	8
Strong (including investment grade) [Member] | 0.15 to less than 0.30% | Loan commitments [member] | ECL | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of internal credit grades [line items]
Credit exposure	47	1
Strong (including investment grade) [Member] | 0.15 to less than 0.30% | Loan commitments [member] | ECL | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of internal credit grades [line items]
Credit exposure	0	0
Strong (including investment grade) [Member] | 0.30 to less than 0.60% | Loans and advances [member] | Financial assets at amortised cost [member]
Disclosure of internal credit grades [line items]
Credit exposure	£ 39,406	£ 37,340
ECL coverage	0.70%	0.30%
Strong (including investment grade) [Member] | 0.30 to less than 0.60% | Loans and advances [member] | Financial assets at amortised cost [member] | Gross exposure [member] | ECL [member]
Disclosure of internal credit grades [line items]
Credit exposure	£ 39,694	£ 37,447
Strong (including investment grade) [Member] | 0.30 to less than 0.60% | Loans and advances [member] | Financial assets at amortised cost [member] | Gross exposure [member] | Stage 1 [member]
Disclosure of internal credit grades [line items]
Credit exposure	34,601	34,515
Strong (including investment grade) [Member] | 0.30 to less than 0.60% | Loans and advances [member] | Financial assets at amortised cost [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of internal credit grades [line items]
Credit exposure	5,093	2,932
Strong (including investment grade) [Member] | 0.30 to less than 0.60% | Loans and advances [member] | Financial assets at amortised cost [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of internal credit grades [line items]
Credit exposure	0	0
Strong (including investment grade) [Member] | 0.30 to less than 0.60% | Loans and advances [member] | Financial assets at amortised cost [member] | ECL | ECL [member]
Disclosure of internal credit grades [line items]
Credit exposure	288	107
Strong (including investment grade) [Member] | 0.30 to less than 0.60% | Loans and advances [member] | Financial assets at amortised cost [member] | ECL | Stage 1 [member]
Disclosure of internal credit grades [line items]
Credit exposure	120	91
Strong (including investment grade) [Member] | 0.30 to less than 0.60% | Loans and advances [member] | Financial assets at amortised cost [member] | ECL | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of internal credit grades [line items]
Credit exposure	120	91
Strong (including investment grade) [Member] | 0.30 to less than 0.60% | Loans and advances [member] | Financial assets at amortised cost [member] | ECL | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of internal credit grades [line items]
Credit exposure	168	16
Strong (including investment grade) [Member] | 0.30 to less than 0.60% | Contingent liabilities [member]
Disclosure of internal credit grades [line items]
Credit exposure	£ 4,038	£ 4,683
ECL coverage	0.90%	0.10%
Strong (including investment grade) [Member] | 0.30 to less than 0.60% | Contingent liabilities [member] | Gross exposure [member] | ECL [member]
Disclosure of internal credit grades [line items]
Credit exposure	£ 4,076	£ 4,687
Strong (including investment grade) [Member] | 0.30 to less than 0.60% | Contingent liabilities [member] | Gross exposure [member] | Stage 1 [member]
Disclosure of internal credit grades [line items]
Credit exposure	3,524	4,551
Strong (including investment grade) [Member] | 0.30 to less than 0.60% | Contingent liabilities [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of internal credit grades [line items]
Credit exposure	552	136
Strong (including investment grade) [Member] | 0.30 to less than 0.60% | Contingent liabilities [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of internal credit grades [line items]
Credit exposure	0	0
Strong (including investment grade) [Member] | 0.30 to less than 0.60% | Contingent liabilities [member] | ECL | ECL [member]
Disclosure of internal credit grades [line items]
Credit exposure	38	4
Strong (including investment grade) [Member] | 0.30 to less than 0.60% | Contingent liabilities [member] | ECL | Stage 1 [member]
Disclosure of internal credit grades [line items]
Credit exposure	5	2
Strong (including investment grade) [Member] | 0.30 to less than 0.60% | Contingent liabilities [member] | ECL | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of internal credit grades [line items]
Credit exposure	33	2
Strong (including investment grade) [Member] | 0.30 to less than 0.60% | Contingent liabilities [member] | ECL | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of internal credit grades [line items]
Credit exposure	0	0
Strong (including investment grade) [Member] | 0.30 to less than 0.60% | Loan commitments [member]
Disclosure of internal credit grades [line items]
Credit exposure	£ 50,511	£ 45,675
ECL coverage	0.20%	0.00%
Strong (including investment grade) [Member] | 0.30 to less than 0.60% | Loan commitments [member] | Gross exposure [member] | ECL [member]
Disclosure of internal credit grades [line items]
Credit exposure	£ 50,600	£ 45,689
Strong (including investment grade) [Member] | 0.30 to less than 0.60% | Loan commitments [member] | Gross exposure [member] | Stage 1 [member]
Disclosure of internal credit grades [line items]
Credit exposure	43,650	44,097
Strong (including investment grade) [Member] | 0.30 to less than 0.60% | Loan commitments [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of internal credit grades [line items]
Credit exposure	6,950	1,592
Strong (including investment grade) [Member] | 0.30 to less than 0.60% | Loan commitments [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of internal credit grades [line items]
Credit exposure	0	0
Strong (including investment grade) [Member] | 0.30 to less than 0.60% | Loan commitments [member] | ECL | ECL [member]
Disclosure of internal credit grades [line items]
Credit exposure	89	14
Strong (including investment grade) [Member] | 0.30 to less than 0.60% | Loan commitments [member] | ECL | Stage 1 [member]
Disclosure of internal credit grades [line items]
Credit exposure	17	13
Strong (including investment grade) [Member] | 0.30 to less than 0.60% | Loan commitments [member] | ECL | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of internal credit grades [line items]
Credit exposure	72	1
Strong (including investment grade) [Member] | 0.30 to less than 0.60% | Loan commitments [member] | ECL | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of internal credit grades [line items]
Credit exposure	0	0
Satisfactory (BB+ to B) [member] | 0.60 to less than 2.15% | Loans and advances [member] | Financial assets at amortised cost [member]
Disclosure of internal credit grades [line items]
Credit exposure	£ 36,925	£ 39,634
ECL coverage	2.60%	1.00%
Satisfactory (BB+ to B) [member] | 0.60 to less than 2.15% | Loans and advances [member] | Financial assets at amortised cost [member] | Gross exposure [member] | ECL [member]
Disclosure of internal credit grades [line items]
Credit exposure	£ 37,897	£ 40,031
Satisfactory (BB+ to B) [member] | 0.60 to less than 2.15% | Loans and advances [member] | Financial assets at amortised cost [member] | Gross exposure [member] | Stage 1 [member]
Disclosure of internal credit grades [line items]
Credit exposure	29,498	35,690
Satisfactory (BB+ to B) [member] | 0.60 to less than 2.15% | Loans and advances [member] | Financial assets at amortised cost [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of internal credit grades [line items]
Credit exposure	8,399	4,341
Satisfactory (BB+ to B) [member] | 0.60 to less than 2.15% | Loans and advances [member] | Financial assets at amortised cost [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of internal credit grades [line items]
Credit exposure	0	0
Satisfactory (BB+ to B) [member] | 0.60 to less than 2.15% | Loans and advances [member] | Financial assets at amortised cost [member] | ECL | ECL [member]
Disclosure of internal credit grades [line items]
Credit exposure	972	397
Satisfactory (BB+ to B) [member] | 0.60 to less than 2.15% | Loans and advances [member] | Financial assets at amortised cost [member] | ECL | Stage 1 [member]
Disclosure of internal credit grades [line items]
Credit exposure	379	210
Satisfactory (BB+ to B) [member] | 0.60 to less than 2.15% | Loans and advances [member] | Financial assets at amortised cost [member] | ECL | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of internal credit grades [line items]
Credit exposure	379	210
Satisfactory (BB+ to B) [member] | 0.60 to less than 2.15% | Loans and advances [member] | Financial assets at amortised cost [member] | ECL | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of internal credit grades [line items]
Credit exposure	593	187
Satisfactory (BB+ to B) [member] | 0.60 to less than 2.15% | Contingent liabilities [member]
Disclosure of internal credit grades [line items]
Credit exposure	£ 3,225	£ 3,168
ECL coverage	1.00%	0.50%
Satisfactory (BB+ to B) [member] | 0.60 to less than 2.15% | Contingent liabilities [member] | Gross exposure [member] | ECL [member]
Disclosure of internal credit grades [line items]
Credit exposure	£ 3,258	£ 3,183
Satisfactory (BB+ to B) [member] | 0.60 to less than 2.15% | Contingent liabilities [member] | Gross exposure [member] | Stage 1 [member]
Disclosure of internal credit grades [line items]
Credit exposure	2,712	2,529
Satisfactory (BB+ to B) [member] | 0.60 to less than 2.15% | Contingent liabilities [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of internal credit grades [line items]
Credit exposure	546	654
Satisfactory (BB+ to B) [member] | 0.60 to less than 2.15% | Contingent liabilities [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of internal credit grades [line items]
Credit exposure	0	0
Satisfactory (BB+ to B) [member] | 0.60 to less than 2.15% | Contingent liabilities [member] | ECL | ECL [member]
Disclosure of internal credit grades [line items]
Credit exposure	33	15
Satisfactory (BB+ to B) [member] | 0.60 to less than 2.15% | Contingent liabilities [member] | ECL | Stage 1 [member]
Disclosure of internal credit grades [line items]
Credit exposure	8	7
Satisfactory (BB+ to B) [member] | 0.60 to less than 2.15% | Contingent liabilities [member] | ECL | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of internal credit grades [line items]
Credit exposure	25	8
Satisfactory (BB+ to B) [member] | 0.60 to less than 2.15% | Contingent liabilities [member] | ECL | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of internal credit grades [line items]
Credit exposure	0	0
Satisfactory (BB+ to B) [member] | 0.60 to less than 2.15% | Loan commitments [member]
Disclosure of internal credit grades [line items]
Credit exposure	£ 40,652	£ 40,011
ECL coverage	0.60%	0.10%
Satisfactory (BB+ to B) [member] | 0.60 to less than 2.15% | Loan commitments [member] | Gross exposure [member] | ECL [member]
Disclosure of internal credit grades [line items]
Credit exposure	£ 40,902	£ 40,067
Satisfactory (BB+ to B) [member] | 0.60 to less than 2.15% | Loan commitments [member] | Gross exposure [member] | Stage 1 [member]
Disclosure of internal credit grades [line items]
Credit exposure	30,994	36,112
Satisfactory (BB+ to B) [member] | 0.60 to less than 2.15% | Loan commitments [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of internal credit grades [line items]
Credit exposure	9,908	3,955
Satisfactory (BB+ to B) [member] | 0.60 to less than 2.15% | Loan commitments [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of internal credit grades [line items]
Credit exposure	0	0
Satisfactory (BB+ to B) [member] | 0.60 to less than 2.15% | Loan commitments [member] | ECL | ECL [member]
Disclosure of internal credit grades [line items]
Credit exposure	250	56
Satisfactory (BB+ to B) [member] | 0.60 to less than 2.15% | Loan commitments [member] | ECL | Stage 1 [member]
Disclosure of internal credit grades [line items]
Credit exposure	119	30
Satisfactory (BB+ to B) [member] | 0.60 to less than 2.15% | Loan commitments [member] | ECL | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of internal credit grades [line items]
Credit exposure	131	26
Satisfactory (BB+ to B) [member] | 0.60 to less than 2.15% | Loan commitments [member] | ECL | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of internal credit grades [line items]
Credit exposure	0	0
Satisfactory (BB+ to B) [member] | 2.15 to less than 10% | Loans and advances [member] | Financial assets at amortised cost [member]
Disclosure of internal credit grades [line items]
Credit exposure	£ 15,676	£ 17,018
ECL coverage	9.20%	6.70%
Satisfactory (BB+ to B) [member] | 2.15 to less than 10% | Loans and advances [member] | Financial assets at amortised cost [member] | Gross exposure [member] | ECL [member]
Disclosure of internal credit grades [line items]
Credit exposure	£ 17,261	£ 18,231
Satisfactory (BB+ to B) [member] | 2.15 to less than 10% | Loans and advances [member] | Financial assets at amortised cost [member] | Gross exposure [member] | Stage 1 [member]
Disclosure of internal credit grades [line items]
Credit exposure	8,125	9,041
Satisfactory (BB+ to B) [member] | 2.15 to less than 10% | Loans and advances [member] | Financial assets at amortised cost [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of internal credit grades [line items]
Credit exposure	9,136	9,190
Satisfactory (BB+ to B) [member] | 2.15 to less than 10% | Loans and advances [member] | Financial assets at amortised cost [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of internal credit grades [line items]
Credit exposure	0	0
Satisfactory (BB+ to B) [member] | 2.15 to less than 10% | Loans and advances [member] | Financial assets at amortised cost [member] | ECL | ECL [member]
Disclosure of internal credit grades [line items]
Credit exposure	1,585	1,213
Satisfactory (BB+ to B) [member] | 2.15 to less than 10% | Loans and advances [member] | Financial assets at amortised cost [member] | ECL | Stage 1 [member]
Disclosure of internal credit grades [line items]
Credit exposure	302	232
Satisfactory (BB+ to B) [member] | 2.15 to less than 10% | Loans and advances [member] | Financial assets at amortised cost [member] | ECL | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of internal credit grades [line items]
Credit exposure	302	232
Satisfactory (BB+ to B) [member] | 2.15 to less than 10% | Loans and advances [member] | Financial assets at amortised cost [member] | ECL | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of internal credit grades [line items]
Credit exposure	1,283	981
Satisfactory (BB+ to B) [member] | 2.15 to less than 10% | Contingent liabilities [member]
Disclosure of internal credit grades [line items]
Credit exposure	£ 675	£ 895
ECL coverage	4.00%	1.30%
Satisfactory (BB+ to B) [member] | 2.15 to less than 10% | Contingent liabilities [member] | Gross exposure [member] | ECL [member]
Disclosure of internal credit grades [line items]
Credit exposure	£ 703	£ 907
Satisfactory (BB+ to B) [member] | 2.15 to less than 10% | Contingent liabilities [member] | Gross exposure [member] | Stage 1 [member]
Disclosure of internal credit grades [line items]
Credit exposure	305	663
Satisfactory (BB+ to B) [member] | 2.15 to less than 10% | Contingent liabilities [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of internal credit grades [line items]
Credit exposure	398	244
Satisfactory (BB+ to B) [member] | 2.15 to less than 10% | Contingent liabilities [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of internal credit grades [line items]
Credit exposure	0	0
Satisfactory (BB+ to B) [member] | 2.15 to less than 10% | Contingent liabilities [member] | ECL | ECL [member]
Disclosure of internal credit grades [line items]
Credit exposure	28	12
Satisfactory (BB+ to B) [member] | 2.15 to less than 10% | Contingent liabilities [member] | ECL | Stage 1 [member]
Disclosure of internal credit grades [line items]
Credit exposure	7	4
Satisfactory (BB+ to B) [member] | 2.15 to less than 10% | Contingent liabilities [member] | ECL | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of internal credit grades [line items]
Credit exposure	21	8
Satisfactory (BB+ to B) [member] | 2.15 to less than 10% | Contingent liabilities [member] | ECL | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of internal credit grades [line items]
Credit exposure	0	0
Satisfactory (BB+ to B) [member] | 2.15 to less than 10% | Loan commitments [member]
Disclosure of internal credit grades [line items]
Credit exposure	£ 10,533	£ 8,707
ECL coverage	1.30%	0.70%
Satisfactory (BB+ to B) [member] | 2.15 to less than 10% | Loan commitments [member] | Gross exposure [member] | ECL [member]
Disclosure of internal credit grades [line items]
Credit exposure	£ 10,673	£ 8,770
Satisfactory (BB+ to B) [member] | 2.15 to less than 10% | Loan commitments [member] | Gross exposure [member] | Stage 1 [member]
Disclosure of internal credit grades [line items]
Credit exposure	5,702	4,913
Satisfactory (BB+ to B) [member] | 2.15 to less than 10% | Loan commitments [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of internal credit grades [line items]
Credit exposure	4,971	3,857
Satisfactory (BB+ to B) [member] | 2.15 to less than 10% | Loan commitments [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of internal credit grades [line items]
Credit exposure	0	0
Satisfactory (BB+ to B) [member] | 2.15 to less than 10% | Loan commitments [member] | ECL | ECL [member]
Disclosure of internal credit grades [line items]
Credit exposure	140	63
Satisfactory (BB+ to B) [member] | 2.15 to less than 10% | Loan commitments [member] | ECL | Stage 1 [member]
Disclosure of internal credit grades [line items]
Credit exposure	27	8
Satisfactory (BB+ to B) [member] | 2.15 to less than 10% | Loan commitments [member] | ECL | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of internal credit grades [line items]
Credit exposure	113	55
Satisfactory (BB+ to B) [member] | 2.15 to less than 10% | Loan commitments [member] | ECL | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of internal credit grades [line items]
Credit exposure	0	0
Satisfactory (BB+ to B) [member] | 10 to less than 11.35% | Loans and advances [member] | Financial assets at amortised cost [member]
Disclosure of internal credit grades [line items]
Credit exposure	£ 7,674	£ 8,698
ECL coverage	3.40%	1.90%
Satisfactory (BB+ to B) [member] | 10 to less than 11.35% | Loans and advances [member] | Financial assets at amortised cost [member] | Gross exposure [member] | ECL [member]
Disclosure of internal credit grades [line items]
Credit exposure	£ 7,942	£ 8,864
Satisfactory (BB+ to B) [member] | 10 to less than 11.35% | Loans and advances [member] | Financial assets at amortised cost [member] | Gross exposure [member] | Stage 1 [member]
Disclosure of internal credit grades [line items]
Credit exposure	3,505	5,235
Satisfactory (BB+ to B) [member] | 10 to less than 11.35% | Loans and advances [member] | Financial assets at amortised cost [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of internal credit grades [line items]
Credit exposure	4,437	3,629
Satisfactory (BB+ to B) [member] | 10 to less than 11.35% | Loans and advances [member] | Financial assets at amortised cost [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of internal credit grades [line items]
Credit exposure	0	0
Satisfactory (BB+ to B) [member] | 10 to less than 11.35% | Loans and advances [member] | Financial assets at amortised cost [member] | ECL | ECL [member]
Disclosure of internal credit grades [line items]
Credit exposure	268	166
Satisfactory (BB+ to B) [member] | 10 to less than 11.35% | Loans and advances [member] | Financial assets at amortised cost [member] | ECL | Stage 1 [member]
Disclosure of internal credit grades [line items]
Credit exposure	73	62
Satisfactory (BB+ to B) [member] | 10 to less than 11.35% | Loans and advances [member] | Financial assets at amortised cost [member] | ECL | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of internal credit grades [line items]
Credit exposure	73	62
Satisfactory (BB+ to B) [member] | 10 to less than 11.35% | Loans and advances [member] | Financial assets at amortised cost [member] | ECL | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of internal credit grades [line items]
Credit exposure	195	104
Satisfactory (BB+ to B) [member] | 10 to less than 11.35% | Contingent liabilities [member]
Disclosure of internal credit grades [line items]
Credit exposure	£ 587	£ 575
ECL coverage	14.60%	3.00%
Satisfactory (BB+ to B) [member] | 10 to less than 11.35% | Contingent liabilities [member] | Gross exposure [member] | ECL [member]
Disclosure of internal credit grades [line items]
Credit exposure	£ 687	£ 593
Satisfactory (BB+ to B) [member] | 10 to less than 11.35% | Contingent liabilities [member] | Gross exposure [member] | Stage 1 [member]
Disclosure of internal credit grades [line items]
Credit exposure	264	421
Satisfactory (BB+ to B) [member] | 10 to less than 11.35% | Contingent liabilities [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of internal credit grades [line items]
Credit exposure	423	172
Satisfactory (BB+ to B) [member] | 10 to less than 11.35% | Contingent liabilities [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of internal credit grades [line items]
Credit exposure	0	0
Satisfactory (BB+ to B) [member] | 10 to less than 11.35% | Contingent liabilities [member] | ECL | ECL [member]
Disclosure of internal credit grades [line items]
Credit exposure	100	18
Satisfactory (BB+ to B) [member] | 10 to less than 11.35% | Contingent liabilities [member] | ECL | Stage 1 [member]
Disclosure of internal credit grades [line items]
Credit exposure	17	9
Satisfactory (BB+ to B) [member] | 10 to less than 11.35% | Contingent liabilities [member] | ECL | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of internal credit grades [line items]
Credit exposure	83	9
Satisfactory (BB+ to B) [member] | 10 to less than 11.35% | Contingent liabilities [member] | ECL | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of internal credit grades [line items]
Credit exposure	0	0
Satisfactory (BB+ to B) [member] | 10 to less than 11.35% | Loan commitments [member]
Disclosure of internal credit grades [line items]
Credit exposure	£ 9,979	£ 5,757
ECL coverage	0.40%	0.20%
Satisfactory (BB+ to B) [member] | 10 to less than 11.35% | Loan commitments [member] | Gross exposure [member] | ECL [member]
Disclosure of internal credit grades [line items]
Credit exposure	£ 10,015	£ 5,768
Satisfactory (BB+ to B) [member] | 10 to less than 11.35% | Loan commitments [member] | Gross exposure [member] | Stage 1 [member]
Disclosure of internal credit grades [line items]
Credit exposure	4,886	3,662
Satisfactory (BB+ to B) [member] | 10 to less than 11.35% | Loan commitments [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of internal credit grades [line items]
Credit exposure	5,129	2,106
Satisfactory (BB+ to B) [member] | 10 to less than 11.35% | Loan commitments [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of internal credit grades [line items]
Credit exposure	0	0
Satisfactory (BB+ to B) [member] | 10 to less than 11.35% | Loan commitments [member] | ECL | ECL [member]
Disclosure of internal credit grades [line items]
Credit exposure	36	11
Satisfactory (BB+ to B) [member] | 10 to less than 11.35% | Loan commitments [member] | ECL | Stage 1 [member]
Disclosure of internal credit grades [line items]
Credit exposure	11	4
Satisfactory (BB+ to B) [member] | 10 to less than 11.35% | Loan commitments [member] | ECL | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of internal credit grades [line items]
Credit exposure	25	7
Satisfactory (BB+ to B) [member] | 10 to less than 11.35% | Loan commitments [member] | ECL | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of internal credit grades [line items]
Credit exposure	0	0
Higher risk (B- and below) [member] | 11.35% to 100% | Loans and advances [member] | Financial assets at amortised cost [member]
Disclosure of internal credit grades [line items]
Credit exposure	£ 4,512	£ 4,197
ECL coverage	22.00%	21.00%
Higher risk (B- and below) [member] | 11.35% to 100% | Loans and advances [member] | Financial assets at amortised cost [member] | Gross exposure [member] | ECL [member]
Disclosure of internal credit grades [line items]
Credit exposure	£ 5,785	£ 5,316
Higher risk (B- and below) [member] | 11.35% to 100% | Loans and advances [member] | Financial assets at amortised cost [member] | Gross exposure [member] | Stage 1 [member]
Disclosure of internal credit grades [line items]
Credit exposure	917	937
Higher risk (B- and below) [member] | 11.35% to 100% | Loans and advances [member] | Financial assets at amortised cost [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of internal credit grades [line items]
Credit exposure	4,868	4,379
Higher risk (B- and below) [member] | 11.35% to 100% | Loans and advances [member] | Financial assets at amortised cost [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of internal credit grades [line items]
Credit exposure	0	0
Higher risk (B- and below) [member] | 11.35% to 100% | Loans and advances [member] | Financial assets at amortised cost [member] | ECL | ECL [member]
Disclosure of internal credit grades [line items]
Credit exposure	1,273	1,119
Higher risk (B- and below) [member] | 11.35% to 100% | Loans and advances [member] | Financial assets at amortised cost [member] | ECL | Stage 1 [member]
Disclosure of internal credit grades [line items]
Credit exposure	72	64
Higher risk (B- and below) [member] | 11.35% to 100% | Loans and advances [member] | Financial assets at amortised cost [member] | ECL | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of internal credit grades [line items]
Credit exposure	72	64
Higher risk (B- and below) [member] | 11.35% to 100% | Loans and advances [member] | Financial assets at amortised cost [member] | ECL | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of internal credit grades [line items]
Credit exposure	1,201	1,055
Higher risk (B- and below) [member] | 11.35% to 100% | Contingent liabilities [member]
Disclosure of internal credit grades [line items]
Credit exposure	£ 748	£ 369
ECL coverage	7.50%	7.50%
Higher risk (B- and below) [member] | 11.35% to 100% | Contingent liabilities [member] | Gross exposure [member] | ECL [member]
Disclosure of internal credit grades [line items]
Credit exposure	£ 809	£ 399
Higher risk (B- and below) [member] | 11.35% to 100% | Contingent liabilities [member] | Gross exposure [member] | Stage 1 [member]
Disclosure of internal credit grades [line items]
Credit exposure	40	117
Higher risk (B- and below) [member] | 11.35% to 100% | Contingent liabilities [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of internal credit grades [line items]
Credit exposure	769	282
Higher risk (B- and below) [member] | 11.35% to 100% | Contingent liabilities [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of internal credit grades [line items]
Credit exposure	0	0
Higher risk (B- and below) [member] | 11.35% to 100% | Contingent liabilities [member] | ECL | ECL [member]
Disclosure of internal credit grades [line items]
Credit exposure	61	30
Higher risk (B- and below) [member] | 11.35% to 100% | Contingent liabilities [member] | ECL | Stage 1 [member]
Disclosure of internal credit grades [line items]
Credit exposure	0	0
Higher risk (B- and below) [member] | 11.35% to 100% | Contingent liabilities [member] | ECL | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of internal credit grades [line items]
Credit exposure	61	30
Higher risk (B- and below) [member] | 11.35% to 100% | Contingent liabilities [member] | ECL | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of internal credit grades [line items]
Credit exposure	0	0
Higher risk (B- and below) [member] | 11.35% to 100% | Loan commitments [member]
Disclosure of internal credit grades [line items]
Credit exposure	£ 4,579	£ 2,588
ECL coverage	2.70%	0.80%
Higher risk (B- and below) [member] | 11.35% to 100% | Loan commitments [member] | Gross exposure [member] | ECL [member]
Disclosure of internal credit grades [line items]
Credit exposure	£ 4,708	£ 2,609
Higher risk (B- and below) [member] | 11.35% to 100% | Loan commitments [member] | Gross exposure [member] | Stage 1 [member]
Disclosure of internal credit grades [line items]
Credit exposure	811	616
Higher risk (B- and below) [member] | 11.35% to 100% | Loan commitments [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of internal credit grades [line items]
Credit exposure	3,897	1,993
Higher risk (B- and below) [member] | 11.35% to 100% | Loan commitments [member] | Gross exposure [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of internal credit grades [line items]
Credit exposure	0	0
Higher risk (B- and below) [member] | 11.35% to 100% | Loan commitments [member] | ECL | ECL [member]
Disclosure of internal credit grades [line items]
Credit exposure	129	21
Higher risk (B- and below) [member] | 11.35% to 100% | Loan commitments [member] | ECL | Stage 1 [member]
Disclosure of internal credit grades [line items]
Credit exposure	5	0
Higher risk (B- and below) [member] | 11.35% to 100% | Loan commitments [member] | ECL | Lifetime expected credit losses [member] | Stage 2 [member]
Disclosure of internal credit grades [line items]
Credit exposure	124	21
Higher risk (B- and below) [member] | 11.35% to 100% | Loan commitments [member] | ECL | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Disclosure of internal credit grades [line items]
Credit exposure	£ 0	£ 0

Other disclosures - Risk Man_23

Other disclosures - Risk Management and Principal Risks - Credit exposures by internal PD grade (audited) (Narrative) (Details) - GBP (£) £ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ (1,329,242)	£ (1,119,650)
ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	9,399	6,630
Other financial assets subject to impairment [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	(180,300)	(149,300)	£ (129,900)
Other financial assets subject to impairment [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	165	24	£ 12
Financial assets designated at fair value [member]
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	9,500	17,700
Financial assets at amortised cost [member] | Loans and advances at amortised cost, including off balance sheet loan commitments and financial guarantee contracts [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	(686,728)	(680,053)
Financial assets at amortised cost [member] | Loans and advances at amortised cost, including off balance sheet loan commitments and financial guarantee contracts [member] | Gross exposure [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	696,127	686,683
Financial assets at amortised cost [member] | Loans and advances at amortised cost, including off balance sheet loan commitments and financial guarantee contracts [member] | ECL
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 9,399	£ 6,630

Other disclosures - Risk Man_24

Other disclosures - Risk Management and Principal Risks - Derivative assets (audited) (Details) - GBP (£) £ in Millions	Dec. 31, 2020	Dec. 31, 2019
Disclosure of nature and extent of risks arising from financial instruments [line items]
Balance sheet assets	£ 449,093	£ 329,502
Counterparty netting	233,080	175,998
Credit derivatives [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Balance sheet assets	1,615,399	1,414,036
Counterparty netting	240,068	183,634
Cash collateral held	46,508	36,261
Derivatives [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Balance sheet assets	302,446	229,236
Counterparty netting	233,080	175,998
Net exposure	69,366	53,238
Cash collateral held	43,291	33,411
Net exposure less collateral	26,075	19,827
Derivatives [member] | Foreign exchange derivatives [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Balance sheet assets	85,115	56,606
Counterparty netting	68,108	44,284
Net exposure	17,007	12,322
Derivatives [member] | Interest rate derivatives [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Balance sheet assets	172,334	142,468
Counterparty netting	128,072	106,589
Net exposure	44,262	35,879
Derivatives [member] | Credit derivatives [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Balance sheet assets	4,605	8,215
Counterparty netting	3,584	6,589
Net exposure	1,021	1,626
Derivatives [member] | Equity and stock index derivatives [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Balance sheet assets	38,972	20,806
Counterparty netting	32,183	17,517
Net exposure	6,789	3,289
Derivatives [member] | Commodity derivatives [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Balance sheet assets	1,420	1,141
Counterparty netting	1,133	1,019
Net exposure	£ 287	£ 122

Other disclosures - Risk Man_25

Other disclosures - Risk Management and Principal Risks - Management VaR (95%, one day) (audited) (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of nature and extent of risks arising from financial instruments [line items]
Methods used to measure risk	Management value at risk (VaR) VaR is an estimate of the potential loss arising from unfavourable market movements if the current positions were to be held unchanged for one business day. For internal market risk management purposes, a historical simulation methodology with a two-year equally weighted historical period, at the 95% confidence level is used for all trading books and some banking books. Limits are applied at the total level as well as by risk factor type, which are then cascaded down to particular trading desks and businesses by the market risk management function.
Average [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Value at risk	£ 32	£ 23
High [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Value at risk	57	29
Low [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Value at risk	£ 18	17
Value at risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Confidence level used to determine risk adjustment for non-financial risk	95.00%
Credit risk [member] | Average [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Value at risk	£ 20	12
Credit risk [member] | High [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Value at risk	38	17
Credit risk [member] | Low [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Value at risk	10	8
Interest rate risk [member] | Average [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Value at risk	10	6
Interest rate risk [member] | High [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Value at risk	17	11
Interest rate risk [member] | Low [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Value at risk	6	3
Equity price risk [member] | Average [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Value at risk	13	10
Equity price risk [member] | High [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Value at risk	35	22
Equity price risk [member] | Low [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Value at risk	6	5
Basis risk [member] | Average [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Value at risk	10	8
Basis risk [member] | High [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Value at risk	16	11
Basis risk [member] | Low [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Value at risk	7	6
Spread risk [member] | Average [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Value at risk	5	4
Spread risk [member] | High [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Value at risk	9	5
Spread risk [member] | Low [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Value at risk	3	3
Foreign exchange risk [member] | Average [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Value at risk	5	3
Foreign exchange risk [member] | High [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Value at risk	7	5
Foreign exchange risk [member] | Low [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Value at risk	2	2
Commodity risk [member] | Average [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Value at risk	1	1
Commodity risk [member] | High [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Value at risk	1	2
Commodity risk [member] | Low [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Value at risk	0	0
Inflation risk [member] | Average [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Value at risk	2	2
Inflation risk [member] | High [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Value at risk	3	3
Inflation risk [member] | Low [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Value at risk	1	1
Diversification effect [member] | Average [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Value at risk	£ (34)	£ (23)

Other disclosures - Risk Man_26

Other disclosures - Risk Management and Principal Risks - Deposit funding (audited) (Details) - GBP (£) £ in Millions	Dec. 31, 2020	Dec. 31, 2019
Disclosure of operating segments [line items]
Loans and advances to customers	£ 343,000
Deposits from customers	£ 481,000
Loan to deposit ratio	71.00%	82.00%
Head Office [member]
Disclosure of operating segments [line items]
Loans and advances to customers	£ 6
Deposits from customers	0
Barclays UK [member] | Operating segments [member]
Disclosure of operating segments [line items]
Loans and advances to customers	214
Deposits from customers	£ 240
Loan to deposit ratio	89.00%	96.00%
Barclays International [member] | Operating segments [member]
Disclosure of operating segments [line items]
Loans and advances to customers	£ 123
Deposits from customers	£ 241
Loan to deposit ratio	51.00%	63.00%

Other disclosures - Risk Man_27

Other disclosures - Risk Management and Principal Risks - Contractural maturity of financial assets and liabilities (audited) (Details) - GBP (£) £ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Assets [abstract]
Cash and balances at central banks	£ 191,127	£ 150,258	£ 177,069
Cash collateral and settlement balances	101,367	83,256
Loans and advances at amortised cost	342,632	339,115
Reverse repurchase agreements and other similar secured lending	9,031	3,379
Trading portfolio assets	127,950	114,195
Financial assets at fair value through the income statement	175,151	133,086
Derivative financial instruments	302,446	229,236
Financial assets at fair value through other comprehensive income	78,688	65,750
Other financial assets	850	1,375
Total financial assets	1,329,242	1,119,650
Other assets	20,272	20,579
Total Assets	1,349,514	1,140,229	1,133,300
Liabilities [abstract]
Deposits at amortised cost	481,036	415,787
Cash collateral and settlement balances	85,423	67,341
Repurchase agreements and other similar secured borrowing	14,174	14,517
Debt securities in issue	75,796	76,369
Subordinated liabilities	16,341	18,156	20,559
Trading portfolio liabilities	47,405	36,916
Financial liabilities designated at fair value	249,765	204,326
Derivative financial liabilities	300,775	229,204
Other financial liabilities	4,969	5,019
Total financial liabilities	1,275,684	1,067,635
Other liabilities	6,948	6,934
Total liabilities	1,282,632	1,074,569
Cumulative liquidity gap	66,882	65,660	£ 63,779	£ 63,866
On demand [member]
Assets [abstract]
Cash and balances at central banks	190,347	149,383
Cash collateral and settlement balances	1,177	2,022
Loans and advances at amortised cost	14,098	14,824
Reverse repurchase agreements and other similar secured lending	150	13
Trading portfolio assets	127,950	114,195
Financial assets at fair value through the income statement	17,377	14,279
Derivative financial instruments	301,880	229,063
Financial assets at fair value through other comprehensive income	0	0
Other financial assets	357	895
Total financial assets	653,336	524,674
Liabilities [abstract]
Deposits at amortised cost	410,894	348,337
Cash collateral and settlement balances	1,900	3,053
Repurchase agreements and other similar secured borrowing	4	7
Debt securities in issue	0	0
Subordinated liabilities	0	0
Trading portfolio liabilities	47,405	36,916
Financial liabilities designated at fair value	15,555	13,952
Derivative financial liabilities	299,795	228,617
Other financial liabilities	101	251
Total financial liabilities	775,654	631,133
Cumulative liquidity gap	(122,318)	(106,459)
Not more than three months [member]
Assets [abstract]
Cash and balances at central banks	182	766
Cash collateral and settlement balances	100,190	81,231
Loans and advances at amortised cost	11,970	10,944
Reverse repurchase agreements and other similar secured lending	8,698	3,097
Trading portfolio assets	0	0
Financial assets at fair value through the income statement	123,044	89,355
Derivative financial instruments	23	30
Financial assets at fair value through other comprehensive income	9,655	6,694
Other financial assets	451	441
Total financial assets	254,213	192,558
Liabilities [abstract]
Deposits at amortised cost	41,468	42,357
Cash collateral and settlement balances	83,523	64,275
Repurchase agreements and other similar secured borrowing	3,276	2,755
Debt securities in issue	16,344	12,795
Subordinated liabilities	1,589	207
Trading portfolio liabilities	0	0
Financial liabilities designated at fair value	172,153	127,939
Derivative financial liabilities	1	1
Other financial liabilities	2,915	2,361
Total financial liabilities	321,269	252,690
Cumulative liquidity gap	(189,374)	(166,591)
Over three months but not more than six months [member]
Assets [abstract]
Cash and balances at central banks	598	109
Cash collateral and settlement balances	0	3
Loans and advances at amortised cost	8,388	13,108
Reverse repurchase agreements and other similar secured lending	0	0
Trading portfolio assets	0	0
Financial assets at fair value through the income statement	7,548	13,979
Derivative financial instruments	0	0
Financial assets at fair value through other comprehensive income	3,517	3,241
Other financial assets	19	25
Total financial assets	20,070	30,465
Liabilities [abstract]
Deposits at amortised cost	15,886	10,671
Cash collateral and settlement balances	0	13
Repurchase agreements and other similar secured borrowing	0	10
Debt securities in issue	4,048	6,560
Subordinated liabilities	3,209	78
Trading portfolio liabilities	0	0
Financial liabilities designated at fair value	8,677	10,890
Derivative financial liabilities	49	0
Other financial liabilities	49	55
Total financial liabilities	31,918	28,277
Cumulative liquidity gap	(201,222)	(164,403)
Over six months and not later than nine months [member]
Assets [abstract]
Cash and balances at central banks	0	0
Cash collateral and settlement balances	0	0
Loans and advances at amortised cost	4,956	7,738
Reverse repurchase agreements and other similar secured lending	0	0
Trading portfolio assets	0	0
Financial assets at fair value through the income statement	6,960	3,443
Derivative financial instruments	0	0
Financial assets at fair value through other comprehensive income	1,393	1,164
Other financial assets	22	0
Total financial assets	13,331	12,345
Liabilities [abstract]
Deposits at amortised cost	5,073	3,861
Cash collateral and settlement balances	0	0
Repurchase agreements and other similar secured borrowing	0	0
Debt securities in issue	5,100	4,147
Subordinated liabilities	294	75
Trading portfolio liabilities	0	0
Financial liabilities designated at fair value	5,067	6,519
Derivative financial liabilities	0	8
Other financial liabilities	46	52
Total financial liabilities	15,580	14,662
Cumulative liquidity gap	(203,471)	(166,720)
Over nine months and not later than one year [member]
Assets [abstract]
Cash and balances at central banks	0	0
Cash collateral and settlement balances	0	0
Loans and advances at amortised cost	5,234	7,031
Reverse repurchase agreements and other similar secured lending	0	0
Trading portfolio assets	0	0
Financial assets at fair value through the income statement	4,151	1,317
Derivative financial instruments	0	0
Financial assets at fair value through other comprehensive income	948	1,159
Other financial assets	0	14
Total financial assets	10,333	9,521
Liabilities [abstract]
Deposits at amortised cost	3,082	4,067
Cash collateral and settlement balances	0	0
Repurchase agreements and other similar secured borrowing	0	0
Debt securities in issue	1,937	3,123
Subordinated liabilities	0	832
Trading portfolio liabilities	0	0
Financial liabilities designated at fair value	2,938	3,798
Derivative financial liabilities	0	0
Other financial liabilities	45	50
Total financial liabilities	8,002	11,870
Cumulative liquidity gap	(201,140)	(169,069)
Later than one year and not later than two years [member]
Assets [abstract]
Cash and balances at central banks	0	0
Cash collateral and settlement balances	0	0
Loans and advances at amortised cost	25,392	21,771
Reverse repurchase agreements and other similar secured lending	0	77
Trading portfolio assets	0	0
Financial assets at fair value through the income statement	4,911	1,664
Derivative financial instruments	70	7
Financial assets at fair value through other comprehensive income	6,469	7,711
Other financial assets	1	0
Total financial assets	36,843	31,230
Liabilities [abstract]
Deposits at amortised cost	2,264	3,935
Cash collateral and settlement balances	0	0
Repurchase agreements and other similar secured borrowing	1,400	10,007
Debt securities in issue	5,780	8,387
Subordinated liabilities	2,192	4,979
Trading portfolio liabilities	0	0
Financial liabilities designated at fair value	8,594	6,981
Derivative financial liabilities	79	36
Other financial liabilities	738	1,110
Total financial liabilities	21,047	35,435
Cumulative liquidity gap	(185,344)	(173,274)
Later than two years and not later than three years [member]
Assets [abstract]
Cash and balances at central banks	0	0
Cash collateral and settlement balances	0	0
Loans and advances at amortised cost	22,133	22,478
Reverse repurchase agreements and other similar secured lending	183	190
Trading portfolio assets	0	0
Financial assets at fair value through the income statement	1,346	512
Derivative financial instruments	55	24
Financial assets at fair value through other comprehensive income	5,566	6,521
Other financial assets	0	0
Total financial assets	29,283	29,725
Liabilities [abstract]
Deposits at amortised cost	625	930
Cash collateral and settlement balances	0	0
Repurchase agreements and other similar secured borrowing	2,329	1,201
Debt securities in issue	10,402	3,325
Subordinated liabilities	14	3,266
Trading portfolio liabilities	0	0
Financial liabilities designated at fair value	6,939	6,235
Derivative financial liabilities	67	42
Other financial liabilities	156	138
Total financial liabilities	20,532	15,137
Cumulative liquidity gap	(176,593)	(158,686)
Over three years but not more than five years [member]
Assets [abstract]
Cash and balances at central banks	0	0
Cash collateral and settlement balances	0	0
Loans and advances at amortised cost	36,286	37,408
Reverse repurchase agreements and other similar secured lending	0	0
Trading portfolio assets	0	0
Financial assets at fair value through the income statement	2,431	953
Derivative financial instruments	310	9
Financial assets at fair value through other comprehensive income	17,552	11,896
Other financial assets	0	0
Total financial assets	56,579	50,266
Liabilities [abstract]
Deposits at amortised cost	601	530
Cash collateral and settlement balances	0	0
Repurchase agreements and other similar secured borrowing	7,073	470
Debt securities in issue	13,608	18,189
Subordinated liabilities	989	1,075
Trading portfolio liabilities	0	0
Financial liabilities designated at fair value	8,580	7,706
Derivative financial liabilities	185	42
Other financial liabilities	273	242
Total financial liabilities	31,309	28,254
Cumulative liquidity gap	(151,323)	(136,674)
Over five years and not later than ten years [member]
Assets [abstract]
Cash and balances at central banks	0	0
Cash collateral and settlement balances	0	0
Loans and advances at amortised cost	47,944	40,702
Reverse repurchase agreements and other similar secured lending	0	0
Trading portfolio assets	0	0
Financial assets at fair value through the income statement	2,345	2,302
Derivative financial instruments	87	79
Financial assets at fair value through other comprehensive income	24,450	21,195
Other financial assets	0	0
Total financial assets	74,826	64,278
Liabilities [abstract]
Deposits at amortised cost	764	545
Cash collateral and settlement balances	0	0
Repurchase agreements and other similar secured borrowing	0	0
Debt securities in issue	12,721	14,342
Subordinated liabilities	6,915	5,979
Trading portfolio liabilities	0	0
Financial liabilities designated at fair value	8,344	7,127
Derivative financial liabilities	196	88
Other financial liabilities	436	351
Total financial liabilities	29,376	28,432
Cumulative liquidity gap	(105,873)	(100,828)
Over ten years [member]
Assets [abstract]
Cash and balances at central banks	0	0
Cash collateral and settlement balances	0	0
Loans and advances at amortised cost	166,231	163,111
Reverse repurchase agreements and other similar secured lending	0	2
Trading portfolio assets	0	0
Financial assets at fair value through the income statement	5,038	5,282
Derivative financial instruments	21	24
Financial assets at fair value through other comprehensive income	9,138	6,169
Other financial assets	0	0
Total financial assets	180,428	174,588
Liabilities [abstract]
Deposits at amortised cost	379	554
Cash collateral and settlement balances	0	0
Repurchase agreements and other similar secured borrowing	92	67
Debt securities in issue	5,856	5,501
Subordinated liabilities	1,139	1,665
Trading portfolio liabilities	0	0
Financial liabilities designated at fair value	12,918	13,179
Derivative financial liabilities	403	370
Other financial liabilities	210	409
Total financial liabilities	20,997	21,745
Cumulative liquidity gap	£ 53,558	£ 52,015

Other disclosures - Risk Man_28

Other disclosures - Risk Management and Principal Risks - Contractural maturity of financial liabilities - undiscounted (audited) (Details) - GBP (£) £ in Millions	Dec. 31, 2020	Dec. 31, 2019
Disclosure of financial liabilities [line items]
Deposits at amortised cost, undiscounted	£ 481,049	£ 415,884
Cash collateral and settlement balances, undiscounted	85,423	67,363
Repurchase agreements and other similar secured lending, undiscounted	14,252	14,709
Debt securities in issue, undiscounted	83,620	84,261
Subordinated liabilities, undiscounted	19,051	22,560
Trading portfolio liabilities, undiscounted	47,405	36,916
Financial liabilities designated at fair value, undiscounted	257,825	212,117
Derivative financial instruments, undiscounted	300,826	229,229
Other financial liabilities, undiscounted	5,332	5,515
Total financial liabilities, undiscounted cash flows	1,294,783	1,088,554
On demand [member]
Disclosure of financial liabilities [line items]
Deposits at amortised cost, undiscounted	410,894	348,337
Cash collateral and settlement balances, undiscounted	1,900	3,053
Repurchase agreements and other similar secured lending, undiscounted	4	7
Debt securities in issue, undiscounted	0	0
Subordinated liabilities, undiscounted	0	0
Trading portfolio liabilities, undiscounted	47,405	36,916
Financial liabilities designated at fair value, undiscounted	15,555	13,952
Derivative financial instruments, undiscounted	299,795	228,617
Other financial liabilities, undiscounted	101	251
Total financial liabilities, undiscounted cash flows	775,654	631,133
Not more than three months [member]
Disclosure of financial liabilities [line items]
Deposits at amortised cost, undiscounted	41,468	42,369
Cash collateral and settlement balances, undiscounted	83,523	64,297
Repurchase agreements and other similar secured lending, undiscounted	3,276	2,758
Debt securities in issue, undiscounted	16,368	12,850
Subordinated liabilities, undiscounted	1,597	207
Trading portfolio liabilities, undiscounted	0	0
Financial liabilities designated at fair value, undiscounted	172,186	128,064
Derivative financial instruments, undiscounted	1	2
Other financial liabilities, undiscounted	2,929	2,372
Total financial liabilities, undiscounted cash flows	321,348	252,919
Over three months but not more than six months [member]
Disclosure of financial liabilities [line items]
Deposits at amortised cost, undiscounted	15,886	10,682
Cash collateral and settlement balances, undiscounted	0	13
Repurchase agreements and other similar secured lending, undiscounted	0	10
Debt securities in issue, undiscounted	4,058	6,589
Subordinated liabilities, undiscounted	3,328	78
Trading portfolio liabilities, undiscounted	0	0
Financial liabilities designated at fair value, undiscounted	8,683	11,020
Derivative financial instruments, undiscounted	49	0
Other financial liabilities, undiscounted	62	65
Total financial liabilities, undiscounted cash flows	32,066	28,457
Over six months and not later than nine months [member]
Disclosure of financial liabilities [line items]
Deposits at amortised cost, undiscounted	8,156	7,946
Cash collateral and settlement balances, undiscounted	0	0
Repurchase agreements and other similar secured lending, undiscounted	0	0
Debt securities in issue, undiscounted	7,061	7,305
Subordinated liabilities, undiscounted	311	950
Trading portfolio liabilities, undiscounted	0	0
Financial liabilities designated at fair value, undiscounted	8,007	10,609
Derivative financial instruments, undiscounted	0	8
Other financial liabilities, undiscounted	116	126
Total financial liabilities, undiscounted cash flows	23,651	26,944
Later than one year and not later than two years [member]
Disclosure of financial liabilities [line items]
Deposits at amortised cost, undiscounted	2,893	4,869
Cash collateral and settlement balances, undiscounted	0	0
Repurchase agreements and other similar secured lending, undiscounted	3,729	11,300
Debt securities in issue, undiscounted	16,684	12,330
Subordinated liabilities, undiscounted	2,498	9,822
Trading portfolio liabilities, undiscounted	0	0
Financial liabilities designated at fair value, undiscounted	15,604	13,507
Derivative financial instruments, undiscounted	147	80
Other financial liabilities, undiscounted	981	1,337
Total financial liabilities, undiscounted cash flows	42,536	53,245
Over three years but not more than five years [member]
Disclosure of financial liabilities [line items]
Deposits at amortised cost, undiscounted	599	532
Cash collateral and settlement balances, undiscounted	0	0
Repurchase agreements and other similar secured lending, undiscounted	7,089	485
Debt securities in issue, undiscounted	14,715	19,132
Subordinated liabilities, undiscounted	1,152	1,286
Trading portfolio liabilities, undiscounted	0	0
Financial liabilities designated at fair value, undiscounted	8,586	8,054
Derivative financial instruments, undiscounted	187	45
Other financial liabilities, undiscounted	338	351
Total financial liabilities, undiscounted cash flows	32,666	29,885
Over five years and not later than ten years [member]
Disclosure of financial liabilities [line items]
Deposits at amortised cost, undiscounted	768	554
Cash collateral and settlement balances, undiscounted	0	0
Repurchase agreements and other similar secured lending, undiscounted	0	0
Debt securities in issue, undiscounted	14,882	16,657
Subordinated liabilities, undiscounted	8,578	7,192
Trading portfolio liabilities, undiscounted	0	0
Financial liabilities designated at fair value, undiscounted	8,369	7,519
Derivative financial instruments, undiscounted	204	99
Other financial liabilities, undiscounted	557	565
Total financial liabilities, undiscounted cash flows	33,358	32,586
Over ten years [member]
Disclosure of financial liabilities [line items]
Deposits at amortised cost, undiscounted	385	595
Cash collateral and settlement balances, undiscounted	0	0
Repurchase agreements and other similar secured lending, undiscounted	154	149
Debt securities in issue, undiscounted	9,852	9,398
Subordinated liabilities, undiscounted	1,587	3,025
Trading portfolio liabilities, undiscounted	0	0
Financial liabilities designated at fair value, undiscounted	20,835	19,392
Derivative financial instruments, undiscounted	443	378
Other financial liabilities, undiscounted	248	448
Total financial liabilities, undiscounted cash flows	£ 33,504	£ 33,385

Other disclosures - Risk Man_29

Other disclosures - Risk Management and Principal Risks - Maturity analysis of off-balance sheet commitments received (audited) (Details) - O-ff Balance sheet commitments received [member] - GBP (£) £ in Millions	Dec. 31, 2020	Dec. 31, 2019
Disclosure of contingent liabilities [line items]
Guarantees, letters of credit and credit insurance	£ 26,711	£ 13,390
Other commitments received	92	91
Total off-balance sheet commitments received	26,803	13,481
On demand [member]
Disclosure of contingent liabilities [line items]
Guarantees, letters of credit and credit insurance	26,368	13,091
Other commitments received	92	91
Total off-balance sheet commitments received	26,460	13,182
Not more than three months [member]
Disclosure of contingent liabilities [line items]
Guarantees, letters of credit and credit insurance	86	106
Other commitments received	0	0
Total off-balance sheet commitments received	86	106
Over three months but not more than six months [member]
Disclosure of contingent liabilities [line items]
Guarantees, letters of credit and credit insurance	37	22
Other commitments received	0	0
Total off-balance sheet commitments received	37	22
Over six months and not later than nine months [member]
Disclosure of contingent liabilities [line items]
Guarantees, letters of credit and credit insurance	68	81
Other commitments received	0	0
Total off-balance sheet commitments received	68	81
Over nine months and not later than one year [member]
Disclosure of contingent liabilities [line items]
Guarantees, letters of credit and credit insurance	8	0
Other commitments received	0	0
Total off-balance sheet commitments received	8	0
Later than one year and not later than two years [member]
Disclosure of contingent liabilities [line items]
Guarantees, letters of credit and credit insurance	18	11
Other commitments received	0	0
Total off-balance sheet commitments received	18	11
Later than two years and not later than three years [member]
Disclosure of contingent liabilities [line items]
Guarantees, letters of credit and credit insurance	14	12
Other commitments received	0	0
Total off-balance sheet commitments received	14	12
Over three years but not more than five years [member]
Disclosure of contingent liabilities [line items]
Guarantees, letters of credit and credit insurance	47	21
Other commitments received	0	0
Total off-balance sheet commitments received	47	21
Over five years and not later than ten years [member]
Disclosure of contingent liabilities [line items]
Guarantees, letters of credit and credit insurance	40	12
Other commitments received	0	0
Total off-balance sheet commitments received	40	12
Over ten years [member]
Disclosure of contingent liabilities [line items]
Guarantees, letters of credit and credit insurance	25	34
Other commitments received	0	0
Total off-balance sheet commitments received	£ 25	£ 34

Other disclosures - Risk Man_30

Other disclosures - Risk Management and Principal Risks - Maturity analysis of off-balance sheet commitments given (audited) (Details) - GBP (£) £ in Millions	Dec. 31, 2020	Dec. 31, 2019
Disclosure of contingent liabilities [line items]
Contingent liabilities	£ 21,609	£ 24,527
Documentary credits and other short-term trade related transactions	1,086	1,291
Standby facilities, credit lines and other commitments	331,963	333,164
Total off-balance sheet	354,658	358,982
On demand [member]
Disclosure of contingent liabilities [line items]
Contingent liabilities	21,307	23,586
Documentary credits and other short-term trade related transactions	1,084	1,287
Standby facilities, credit lines and other commitments	330,499	328,623
Total off-balance sheet	352,890	353,496
Not more than three months [member]
Disclosure of contingent liabilities [line items]
Contingent liabilities	213	366
Documentary credits and other short-term trade related transactions	1	3
Standby facilities, credit lines and other commitments	564	1,133
Total off-balance sheet	778	1,502
Over three months but not more than six months [member]
Disclosure of contingent liabilities [line items]
Contingent liabilities	57	86
Documentary credits and other short-term trade related transactions	1	1
Standby facilities, credit lines and other commitments	93	792
Total off-balance sheet	151	879
Over six months and not later than nine months [member]
Disclosure of contingent liabilities [line items]
Contingent liabilities	6	125
Documentary credits and other short-term trade related transactions	0	0
Standby facilities, credit lines and other commitments	123	973
Total off-balance sheet	129	1,098
Over nine months and not later than one year [member]
Disclosure of contingent liabilities [line items]
Contingent liabilities	1	140
Documentary credits and other short-term trade related transactions	0	0
Standby facilities, credit lines and other commitments	95	639
Total off-balance sheet	96	779
Later than one year and not later than two years [member]
Disclosure of contingent liabilities [line items]
Contingent liabilities	25	143
Documentary credits and other short-term trade related transactions	0	0
Standby facilities, credit lines and other commitments	160	269
Total off-balance sheet	185	412
Later than two years and not later than three years [member]
Disclosure of contingent liabilities [line items]
Contingent liabilities	0	42
Documentary credits and other short-term trade related transactions	0	0
Standby facilities, credit lines and other commitments	199	98
Total off-balance sheet	199	140
Over three years but not more than five years [member]
Disclosure of contingent liabilities [line items]
Contingent liabilities	0	28
Documentary credits and other short-term trade related transactions	0	0
Standby facilities, credit lines and other commitments	202	273
Total off-balance sheet	202	301
Over five years and not later than ten years [member]
Disclosure of contingent liabilities [line items]
Contingent liabilities	0	3
Documentary credits and other short-term trade related transactions	0	0
Standby facilities, credit lines and other commitments	21	139
Total off-balance sheet	21	142
Over ten years [member]
Disclosure of contingent liabilities [line items]
Contingent liabilities	0	8
Documentary credits and other short-term trade related transactions	0	0
Standby facilities, credit lines and other commitments	7	225
Total off-balance sheet	£ 7	£ 233

Other disclosures - Risk Man_31

Other disclosures - Risk Management and Principal Risks - Capital resources (audited) (Details) - GBP (£) £ in Millions	Dec. 31, 2020	Dec. 31, 2019
Disclosure of objectives, policies and processes for managing capital [line items]
PRA transitional total regulatory capital, ratio	22.10%	21.60%
Capital resources [abstract]
Total equity (excluding non-controlling interests) per the balance sheet	£ 65,797	£ 64,429
Other equity instruments	(11,172)	(10,871)
Adjustment to retained earnings for foreseeable dividends	(204)	(1,096)
Minority interests (amount allowed in consolidated CET1)	1,085	1,231
Goodwill and intangible assets	(7,948)	(8,119)
Gains or losses on liabilities at fair value resulting from own credit	870	260
Defined-benefit pension fund assets	£ (1,814)	£ (2,108)
PRA transitional tier 1 capital [member]
Disclosure of objectives, policies and processes for managing capital [line items]
PRA transitional total regulatory capital, ratio	19.00%	17.70%
Capital resources [abstract]
PRA transitional total regulatory capital	£ 58,034	£ 52,241
Fully loaded Common Equity Tier 1 capital [member]
Disclosure of objectives, policies and processes for managing capital [line items]
PRA transitional total regulatory capital, ratio	15.10%	13.80%
Capital resources [abstract]
Additional value adjustments (PVA)	£ (1,146)	£ (1,746)
Goodwill and intangible assets	(6,914)	(8,109)
Deferred tax assets that rely on future profitability excluding temporary differences	(595)	(479)
Fair value reserves related to gains or losses on cash flow hedges	(1,575)	(1,002)
Gains or losses on liabilities at fair value resulting from own credit	(1,326)	(1,594)
Defined-benefit pension fund assets	(50)	(50)
Direct and indirect holdings by an institution of own CET1 instruments	2,556	1,126
Adjustment under IFRS 9 transitional arrangements	55	(55)
PRA transitional total regulatory capital	46,296	40,813
Transitional At1 capital [member]
Capital resources [abstract]
Total equity (excluding non-controlling interests) per the balance sheet	11,172	10,871
Qualifying capital (including minority interests) issued by subsidiaries	646	687
Other regulatory adjustments	(80)	(130)
PRA transitional total regulatory capital	11,738	11,428
Tier 2 (T2) Capital [member]
Capital resources [abstract]
Total equity (excluding non-controlling interests) per the balance sheet	7,836	7,650
Qualifying capital (including minority interests) issued by subsidiaries	1,893	3,984
Other regulatory adjustments	(160)	(250)
Adjustment under IFRS 9 transitional arrangements	57	16
PRA transitional total regulatory capital	£ 67,660	£ 63,641

Other disclosures - Risk Man_32

Other disclosures - Risk Management and Principal Risks - Functional currency of the operations (audited) (Details) - GBP (£) £ in Millions	Dec. 31, 2020	Dec. 31, 2019
Foreign exchange risk [member]
Disclosure of risk management strategy related to hedge accounting [line items]
Foreign currency net investments, hedged item	£ 32,081	£ 31,209
Borrowings which hedge net investments	(8,660)	(10,051)
Derivatives which hedge the net investments	(791)	(1,145)
Structural currency exposures pre-economic hedges	22,630	20,013
Economic hedges	(6,479)	(6,461)
Remaining structural currency exposures	16,151	13,552
USD foreign operations
Disclosure of risk management strategy related to hedge accounting [line items]
Foreign currency net investments, hedged item	24,204	25,607
Borrowings which hedge net investments	(7,666)	(10,048)
Derivatives which hedge the net investments	(764)	(1,111)
Structural currency exposures pre-economic hedges	15,774	14,448
Economic hedges	(6,193)	(5,339)
Remaining structural currency exposures	9,581	9,109
EUR foreign operations
Disclosure of risk management strategy related to hedge accounting [line items]
Foreign currency net investments, hedged item	5,275	3,068
Borrowings which hedge net investments	(952)	(3)
Derivatives which hedge the net investments	(3)	0
Structural currency exposures pre-economic hedges	4,320	3,065
Economic hedges	(286)	(1,122)
Remaining structural currency exposures	4,034	1,943
JPY foreign operations
Disclosure of risk management strategy related to hedge accounting [line items]
Foreign currency net investments, hedged item	582	533
Borrowings which hedge net investments	0	0
Derivatives which hedge the net investments	0	0
Structural currency exposures pre-economic hedges	582	533
Economic hedges	0	0
Remaining structural currency exposures	582	533
Other currencies
Disclosure of risk management strategy related to hedge accounting [line items]
Foreign currency net investments, hedged item	2,020	2,001
Borrowings which hedge net investments	(42)	0
Derivatives which hedge the net investments	(24)	(34)
Structural currency exposures pre-economic hedges	1,954	1,967
Economic hedges	0	0
Remaining structural currency exposures	£ 1,954	£ 1,967

Other disclosures - Risk Man_33

Other disclosures - Risk Management and Principal Risks - Functional currency of the operations (audited) (Narrative) (Details) - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Foreign exchange risk [member]
Disclosure of risk management strategy related to hedge accounting [line items]
Increase (decrease) in structural currency exposures, net of hedging instruments	£ 2,600
Structural currency exposures, net of hedging instruments	16,151	£ 13,552
Increase (decrease) in foreign currency net investments, hedged item	900
Foreign currency net investments, hedged item	32,081	31,209
Increase (decrease) in financial instruments which hedge net investments, Hedges	(1,700)
USD
Disclosure of risk management strategy related to hedge accounting [line items]
Structural currency exposures, net of hedging instruments	9,581	9,109
Foreign currency net investments, hedged item	24,204	25,607
Increase (decrease) in financial instruments which hedge net investments, Hedges	(1,400)
EUR
Disclosure of risk management strategy related to hedge accounting [line items]
Structural currency exposures, net of hedging instruments	4,034	1,943
Foreign currency net investments, hedged item	5,275	3,068
Increase (decrease) in financial instruments which hedge net investments, Hedges	2,200
Other currencies
Disclosure of risk management strategy related to hedge accounting [line items]
Structural currency exposures, net of hedging instruments	1,954	1,967
Foreign currency net investments, hedged item	2,020	£ 2,001
Increase (decrease) in financial instruments which hedge net investments, Hedges	£ 100

Other disclosures - Risk Man_34

Other disclosures - Risk Management and Principal Risks - Interest Income sensitivity (AEaR) by business unit (audited) (Details) - Interest rate risk [member] - +/- 25bps [member] - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of operating segments [line items]
Net interest income sensitivity (AEaR), increase	£ 100	£ 45
Net interest income sensitivity (AEaR), decrease	(408)	(135)
Barclays UK [member]
Disclosure of operating segments [line items]
Net interest income sensitivity (AEaR), increase	10	16
Net interest income sensitivity (AEaR), decrease	(141)	(57)
Barclays International [member]
Disclosure of operating segments [line items]
Net interest income sensitivity (AEaR), increase	86	25
Net interest income sensitivity (AEaR), decrease	£ (263)	£ (74)

Other disclosures - Risk Man_35

Other disclosures - Risk Management and Principal Risks - Interest Income sensitivity (AEaR) by business unit (audited) (Narrative) (Details) - Interest rate risk [member] - +/- 25bps [member] - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of operating segments [line items]
Net interest income sensitivity (AEaR), increase	£ 100	£ 45
Net interest income sensitivity (AEaR), decrease	£ (408)	£ (135)

Other disclosures - Risk Man_36

Other disclosures - Risk Management and Principal Risks - Interest Income sensitivity (AEaR) by currency (audited) (Details) - +/- 25bps [member] - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Interest rate risk [member]
Disclosure of operating segments [line items]
Net interest income sensitivity (AEaR), increase	£ 100	£ 45
Net interest income sensitivity (AEaR), decrease	(408)	(135)
GBP
Disclosure of operating segments [line items]
Net interest income sensitivity (AEaR), increase	48	38
Net interest income sensitivity (AEaR), decrease	(313)	(93)
USD
Disclosure of operating segments [line items]
Net interest income sensitivity (AEaR), increase	48	29
Net interest income sensitivity (AEaR), decrease	(63)	(32)
EUR
Disclosure of operating segments [line items]
Net interest income sensitivity (AEaR), increase	10	(10)
Net interest income sensitivity (AEaR), decrease	(34)	(20)
Other currencies
Disclosure of operating segments [line items]
Net interest income sensitivity (AEaR), increase	(6)	(12)
Net interest income sensitivity (AEaR), decrease	£ 2	£ 10

Other disclosures - Risk Man_37

Other disclosures - Risk Management and Principal Risks - Analysis of equity sensitivity (audited) (Details) - Interest rate risk [member] - +/- 25bps [member] - GBP (£) £ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of sensitivity analysis to changes in risk exposures that arise from contracts within scope of IFRS 17 [line items]
Effect on profit for the year, increase	£ 100	£ 45
Effect on profit for the year, decrease	(408)	(135)
Effect on equity, increase	(662)	(608)
Effect on equity, decrease	449	546
Retained earnings [member]
Disclosure of sensitivity analysis to changes in risk exposures that arise from contracts within scope of IFRS 17 [line items]
Effect on profit for the year, increase	73	34
Effect on profit for the year, decrease	£ (298)	£ (101)
As percentage, increase	3.00%	1.00%
As percentage, decrease	(12.10%)	(3.00%)
Effect on equity, increase	£ 73	£ 34
Effect on equity, decrease	(298)	(101)
Taxation effects on the above [member]
Disclosure of sensitivity analysis to changes in risk exposures that arise from contracts within scope of IFRS 17 [line items]
Effect on profit for the year, increase	(27)	(11)
Effect on profit for the year, decrease	110	34
Effect on equity, increase	272	214
Effect on equity, decrease	(276)	(216)
Available for sale reserve [member]
Disclosure of sensitivity analysis to changes in risk exposures that arise from contracts within scope of IFRS 17 [line items]
Effect on equity, increase	(437)	(321)
Effect on equity, decrease	453	329
Reserve of cash flow hedges [member]
Disclosure of sensitivity analysis to changes in risk exposures that arise from contracts within scope of IFRS 17 [line items]
Effect on equity, increase	(570)	(534)
Effect on equity, decrease	£ 570	£ 534
Equity [member]
Disclosure of sensitivity analysis to changes in risk exposures that arise from contracts within scope of IFRS 17 [line items]
As percentage, increase	(1.00%)	(0.90%)
As percentage, decrease	0.70%	0.80%

Uncategorized Items - bcs-20201

Label	Element	Value
Bank acceptance assets, classified as cash equivalents	bcs_BankAcceptanceAssetsClassifiedAsCashEquivalents	£ 7,854,000,000	[1]
Bank acceptance assets, classified as cash equivalents	bcs_BankAcceptanceAssetsClassifiedAsCashEquivalents	12,204,000,000	[1]
Bank acceptance assets, classified as cash equivalents	bcs_BankAcceptanceAssetsClassifiedAsCashEquivalents	8,075,000,000	[1]
Short-term deposits, classified as cash equivalents	ifrs-full_ShorttermDepositsClassifiedAsCashEquivalents	5,955,000,000
Short-term deposits, classified as cash equivalents	ifrs-full_ShorttermDepositsClassifiedAsCashEquivalents	8,021,000,000
Short-term deposits, classified as cash equivalents	ifrs-full_ShorttermDepositsClassifiedAsCashEquivalents	7,676,000,000
Short-term investments, classified as cash equivalents	ifrs-full_ShorttermInvestmentsClassifiedAsCashEquivalents	856,000,000
Short-term investments, classified as cash equivalents	ifrs-full_ShorttermInvestmentsClassifiedAsCashEquivalents	917,000,000
Short-term investments, classified as cash equivalents	ifrs-full_ShorttermInvestmentsClassifiedAsCashEquivalents	£ 480,000,000
[1]	‘Cash collateral balances with central banks with original maturity less than three months’ was previously labelled ‘Cash collateral and settlement balances with banks with original maturity less than three months’. This line it em has been restated to include only balances that the Group holds at central banks related to payment schemes. Previously, cash collateral and settlement balances with non-central bank counterparties were also classified as cash equivalents and included w ithin this balance. Comparatives have been restated. The effect of this change decreased cash and cash equivalents by £ 16,774 m as at 31 December 2019, £ 17,429 m as at 31 December 2018 and £ 18,683 as at 31 December 2017. As a result, net cash from operating activities increased by £655m in 2019 and £1,254m in 2018 representing the net decrease/(increase) in the cash collateral and settlement bala nces line item in those periods .