Barclays Bank (ATMP) 6-K 1 Aug 19 2019 Q2 Current report (foreign) Financial data

Document and Entity Information

Document and Entity Information	6 Months Ended
	Jun. 30, 2019
Document And Entity Information [abstract]
Document Type	6-K
Amendment Flag	false
Document Period End Date	Jun. 30, 2019
Entity Registrant Name	BARCLAYS BANK PLC
Entity Central Index Key	0000312070
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q2

Condensed consolidated Income S

Condensed consolidated Income Statement (unaudited) - GBP (£) £ in Millions		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018
Continuing operations
Net interest income		£ 1,821	£ 1,501
Net fee and commission income	[1]	2,829	2,862
Net trading income		2,093	2,319
Net investment income		337	494
Other income		42	77
Total income	[2]	7,122	7,253
Credit impairment charges and other provisions		(510)	(156)
Net operating income		6,612	7,097
Staff costs		(2,354)	(2,438)
Infrastructure, administration and general expenses		(2,488)	(2,319)
Litigation and conduct		(68)	(1,627)
Operating expenses		(4,910)	(6,384)
Profit on disposal of undertakings and share of results of associates and joint ventures		23	12
Profit before tax		1,725	725
Tax charge	[1],[3]	(260)	(294)
Profit after tax in respect of continuing operations		1,465	431
Loss after tax in respect of discontinued operations		0	(47)
Profit after tax		1,465	384
Attributable to:
Equity holders of the parent	[3]	1,171	75
Other equity instrument holders		294	310
Total equity holders of the parent		1,465	385
Non-controlling interests in respect of continuing operations	[1]	0	(1)
Profit after tax		£ 1,465	£ 384
[1]	For notes to the Financial Statements see pages 19 to 44
[2]	The geographic region is based on counterparty location
[3]	From 2019, due to an IAS 12 update, the tax relief on payments in relation to A T1 instruments has been recognised in the tax charge of the income statement, whereas it was previously recorded in re tained earnings . Comparatives have been restated, reducing the tax charge for H118 by £ 84 m. Further detail can be found in Note 1, B asis of preparation on pages 19 to 20

Condensed consolidated income_2

Condensed consolidated income statement (unaudited) (Parenthetical) £ in Millions	6 Months Ended
	Jun. 30, 2018GBP (£)
Disclosure of expected impact of initial application of new standards or interpretations [line items]
Tax charge	£ (294)	[1],[2]
IAS 12 update [member] | Increase (decrease) due to changes in accounting policy [member]
Disclosure of expected impact of initial application of new standards or interpretations [line items]
Tax charge	£ 84
[1]	For notes to the Financial Statements see pages 19 to 44
[2]	From 2019, due to an IAS 12 update, the tax relief on payments in relation to A T1 instruments has been recognised in the tax charge of the income statement, whereas it was previously recorded in re tained earnings . Comparatives have been restated, reducing the tax charge for H118 by £ 84 m. Further detail can be found in Note 1, B asis of preparation on pages 19 to 20

Condensed consolidated balance

Condensed consolidated balance sheet (unaudited) - GBP (£) £ in Millions		Jun. 30, 2019		Dec. 31, 2018
Assets
Cash and balances at central banks		£ 123,629		£ 136,359
Cash collateral and settlement balances		101,323		74,352
Loans and advances at amortised cost		144,664		136,959
Reverse repurchase agreements and other similar secured lending		7,865		1,613
Trading portfolio assets		120,025		104,038
Financial assets at fair value through the income statement		156,243		145,250
Derivative financial instruments		244,422		222,683
Financial assets at fair value through other comprehensive income		55,856		44,994
Investments in associates and joint ventures		732		762
Goodwill and intangible assets		1,282		1,327
Property, plant and equipment		1,628	[1]	947
Current tax assets	[2]	2,041		1,713
Deferred tax assets	[2]	2,677		2,970
Retirement benefit assets	[2]	1,875		1,768
Other assets		5,004		1,965
Total Assets		969,266		877,700
Liabilities
Deposits at amortised cost		215,125		199,337
Cash collateral and settlement balances		93,723		67,736
Repurchase agreements and other similar secured borrowing		5,992		7,378
Debt securities in issue		42,251		39,063
Subordinated liabilities	[2]	36,368		35,327
Trading portfolio liabilities		41,335		36,614
Financial liabilities designated at fair value		229,875		217,741
Derivative financial instruments		243,004		219,592
Current tax liabilities	[2]	613		621
Deferred tax liabilities	[2]	332		0
Retirement benefit liabilities	[2]	287		283
Other liabilities		6,897	[1]	5,170
Provisions		854		1,127
Total liabilities		916,656		829,989
Equity
Called up share capital and share premium	[2]	2,348		2,348
Other reserves	[2]	4,608		3,361
Retained earnings		36,252		34,405
Shareholders equity attributable to ordinary shareholders of the parent		43,208		40,114
Other equity instruments	[2]	9,402		7,595
Total equity excluding non-controlling interests		52,610		47,709
Non-controlling interests	[2]	0		2
Total equity		52,610		47,711
Total liabilities and equity		£ 969,266		£ 877,700
[1]	Barclays Bank PLC adopted the accounting standard IFRS 16 on 1 January 2019. The impact on adoption was an increase in property, plant and equipment of £ 0.5 bn, an increase in liabilities of £ 0.5 bn, with no material impact on re tained earnings
[2]	For notes to the Financial Statements see pages 19 to 44

Condensed consolidated balanc_2

Condensed consolidated balance sheet (unaudited) (Parenthetical) - GBP (£) £ in Millions	Jun. 30, 2019	[1]	Dec. 31, 2018
Disclosure of expected impact of initial application of new standards or interpretations [line items]
Property, plant and equipment	£ 1,628		£ 947
Other liabilities	£ 6,897		5,170
IFRS 16 - Leases [member] | Increase (decrease) due to changes in accounting policy [member]
Disclosure of expected impact of initial application of new standards or interpretations [line items]
Property, plant and equipment			500
Other liabilities			£ 500
[1]	Barclays Bank PLC adopted the accounting standard IFRS 16 on 1 January 2019. The impact on adoption was an increase in property, plant and equipment of £ 0.5 bn, an increase in liabilities of £ 0.5 bn, with no material impact on re tained earnings

Condensed consolidated statemen

Condensed consolidated statement of comprehensive income (unaudited) - GBP (£) £ in Millions		6 Months Ended
		Jun. 30, 2019		Jun. 30, 2018
Disclosure of operating segments [line items]
Profit after tax		£ 1,465		£ 384
Profit after tax in respect of continuing operations		1,465		431
Loss after tax in respect of discontinued operations		0		(47)
Other comprehensive income/(loss) not recycled to profit or loss from continuing operations:
Total comprehensive income/(loss) for the period		2,572		(277)
Attributable to:
Equity holders of the parent		2,572		(276)
Non-controlling interests		0		(1)
Total comprehensive income/(loss) for the period		2,572		(277)
Continuing operations [member]
Disclosure of operating segments [line items]
Profit after tax		1,465	[1]	431	[2]
Other comprehensive income/(loss) that may be recycled to profit or loss from continuing operations:
Currency translation reserve	[3],[4]	232		350
Fair value through other comprehensive income reserve	[3],[4]	359		(221)
Cash flow hedging reserve	[3],[4]	612		(403)
Other	[4]	0		10
Other comprehensive income/(loss) that may be recycled to profit or loss from continuing operations	[4]	1,203		(264)
Other comprehensive income/(loss) not recycled to profit or loss from continuing operations:
Retirement benefit remeasurements	[3],[4]	(140)		(54)
Fair value through other comprehensive income reserve	[3],[4]	0		(267)
Own credit	[3],[4]	44		(73)
Other comprehensive loss not recycled to profit or loss from continuing operations	[4]	(96)		(394)
Other comprehensive income/(loss) for the period		1,107		(658)
Total comprehensive income/(loss) for the period		2,572		(227)
Attributable to:
Total comprehensive income/(loss) for the period		2,572		(227)
Discontinued operations [member]
Other comprehensive income/(loss) not recycled to profit or loss from continuing operations:
Other comprehensive income/(loss) for the period		0		(3)
Total comprehensive income/(loss) for the period		0		(50)	[5]
Attributable to:
Total comprehensive income/(loss) for the period		£ 0		£ (50)	[5]
[1]	From 2019, due to an IAS 12 update, the tax relief on payments in relation to AT 1 instruments has been recognised in the tax charge of the income statement, whereas it was previously recorded in retained earnings. Comparatives have been restated, increasing the profit after tax for H218 by £91m. Further detail can be found in Note 1, basis of preparation on pages 19 to 20
[2]	From 2019, due to an IAS 12 update, the tax relief on pay ments in relation to AT 1 instruments has been recognised in the tax charge of the income statement, whereas it was previously recorded in retained earnings . Comparatives have been restated, increasing the profit after tax for H118 by £ 84 m. Further detail can be found in Note 1, b a sis of prepa ration on pages 19 to 20 .
[3]	For notes to the Financial Statements see pages 19 to 44
[4]	Reported net of tax
[5]	Details of share capital, other equity instruments and other reserves are shown on pages 33 to 34

Condensed consolidated statem_2

Condensed consolidated statement of changes in equity (unaudited) - GBP (£) £ in Millions		Total	Continuing operations [member]		Discontinued operations [member]		Total equity excluding non-controlling interests [member]	Total equity excluding non-controlling interests [member]Continuing operations [member]		Total equity excluding non-controlling interests [member]Discontinued operations [member]	Called up share capital and share premium [member]	[1]	Called up share capital and share premium [member]Continuing operations [member]	[1]	Called up share capital and share premium [member]Discontinued operations [member]	[1]	Other equity instruments [member]	[1]	Other equity instruments [member]Continuing operations [member]	[1]	Other equity instruments [member]Discontinued operations [member]	[1]	Other reserves [member]	[1]	Other reserves [member]Continuing operations [member]	[1]	Other reserves [member]Discontinued operations [member]	[1]	Retained earnings [member]	Retained earnings [member]Continuing operations [member]		Retained earnings [member]Discontinued operations [member]	Non-controlling interests [member]	[2]	Non-controlling interests [member]Continuing operations [member]	[2]	Non-controlling interests [member]Discontinued operations [member]	[2]
Equity, adjusted balance		£ 63,584					£ 63,583				£ 14,453						£ 8,982						£ 3,672						£ 36,476				£ 1
Beginning Balance, equity at Dec. 31, 2017		65,734					65,733				14,453						8,982						3,808						38,490				1
Profit after tax		384	£ 431	[3]				£ 432	[3]				£ 0	[3]					£ 310	[3]					£ 0	[3]				£ 122	[3]				£ (1)	[3]
Currency translation movements			350	[4],[5]				350					0						0						350					0					0
Fair value through other comprehensive income reserve			(488)	[5]				(488)					0						0						(488)					0					0
Cash flow hedges			(403)	[4],[5]				(403)					0						0						(403)					0					0
Retirement benefit remeasurements			(54)	[4],[5]				(54)					0						0						0					(54)					0
Own credit			(73)	[4],[5]				(73)					0						0						(73)					0					0
Other			10	[5]				10					0						0						0					10					0
Total comprehensive income/(loss) for the period		(277)	(227)		£ (50)	[1]	(276)	(226)		£ (50)	0		0		£ 0		310		310		£ 0		(617)		(614)		£ (3)		31	78		£ (47)	(1)		(1)		£ 0
Other equity instruments coupons paid	[3]	(310)					(310)				0						(310)						0						0				0
Equity settled share schemes		208					208				0						0						0						208				0
Vesting of Barclays PLC shares under equity settled share schemes		(421)					(421)				0						0						0						(421)				0
Dividends paid		(14,274)					(14,274)				0						0						0						(14,274)				0
Capital contribution from Barclays PLC		2,000					2,000				0						0						0						2,000				0
Net equity impact of intragroup transfers		(2,290)					(2,290)				0						(2,070)						16						(236)				0
Other movements		(28)					(30)				0						0						0						(30)				2
Ending Balance, equity at Jun. 30, 2018		48,192					48,190				14,453						6,912						3,071						23,754				2
Profit after tax	[6]		626					625					0						337						0					288					1
Currency translation movements			494					494					0						0						494					0					0
Fair value through other comprehensive income reserve			143					143					0						0						143					0					0
Cash flow hedges			96					96					0						0						96					0					0
Retirement benefit remeasurements			367					367					0						0						0					367					0
Own credit			131					131					0						0						131					0					0
Other			17					17					0						0						0					17					0
Total comprehensive income/(loss) for the period		1,874					1,873				0						337						864						672				1
Issue and exchange of other equity instruments		371					371				0						683						0						(312)				0
Capital reorganisation		0					0				(12,092)						0						0						12,092				0
Other equity instruments coupons paid	[3]	(337)					(337)				0						(337)						0						0				0
Redemption of preference shares		(2,040)					(2,040)				(13)						0						21						(2,048)				0
Equity to debt reclassification		(272)					(272)				0						0						(272)						0				0
Equity settled share schemes		165					165				0						0						0						165				0
Vesting of Barclays PLC shares under equity settled share schemes		3					3				0						0						0						3				0
Dividends paid		(515)					(515)				0						0						0						(515)				0
Capital contribution from Barclays PLC		1,000					1,000				0						0						0						1,000				0
Net equity impact of intragroup transfers		(725)					(725)				0						0						(323)						(402)				0
Other movements		(5)					(4)				0						0						0						(4)				(1)
Ending Balance, equity at Dec. 31, 2018		47,711					47,709				2,348						7,595						3,361						34,405				2
Profit after tax		1,465	1,465	[6]				1,465	[6]				0	[6]					294	[6]					0	[6]				1,171	[6]				0	[6]
Currency translation movements			232	[4],[5]				232					0						0						232					0					0
Fair value through other comprehensive income reserve			359					359					0						0						359					0					0
Cash flow hedges			612	[4],[5]				612					0						0						612					0					0
Retirement benefit remeasurements			(140)	[4],[5]				(140)					0						0						0					(140)					0
Own credit			44	[4],[5]				£ 44					£ 0						£ 0						£ 44					£ 0					£ 0
Other	[5]		0
Total comprehensive income/(loss) for the period		2,572	£ 2,572		£ 0		2,572				0						294						1,247						1,031				0
Issue and exchange of other equity instruments		1,796					1,796				0						1,807						0						(11)				0
Other equity instruments coupons paid	[6]	(294)					(294)				0						(294)						0						0				0
Equity settled share schemes		198					198				0						0						0						198				0
Vesting of Barclays PLC shares under equity settled share schemes		(340)					(340)				0						0						0						(340)				0
Dividends paid		(27)					(27)				0						0						0						(27)				0
Capital contribution from Barclays PLC		995					995				0						0						0						995				0
Other movements		(1)					1				0						0						0						1				(2)
Ending Balance, equity at Jun. 30, 2019		£ 52,610					£ 52,610				£ 2,348						£ 9,402						£ 4,608						£ 36,252				£ 0
[1]	Details of share capital, other equity instruments and other reserves are shown on pages 33 to 34
[2]	Details of non-controlling interests are shown on page 23
[3]	From 2019, due to an IAS 12 update, the tax relief on pay ments in relation to AT 1 instruments has been recognised in the tax charge of the income statement, whereas it was previously recorded in retained earnings . Comparatives have been restated, increasing the profit after tax for H118 by £ 84 m. Further detail can be found in Note 1, b a sis of prepa ration on pages 19 to 20 .
[4]	For notes to the Financial Statements see pages 19 to 44
[5]	Reported net of tax
[6]	From 2019, due to an IAS 12 update, the tax relief on payments in relation to AT 1 instruments has been recognised in the tax charge of the income statement, whereas it was previously recorded in retained earnings. Comparatives have been restated, increasing the profit after tax for H218 by £91m. Further detail can be found in Note 1, basis of preparation on pages 19 to 20

Condensed consolidated statem_3

Condensed consolidated statement of changes in equity (unaudited) (Parenthetical) - GBP (£) £ in Millions	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Profit after tax	£ 1,465	£ 384
Increase (decrease) due to changes in accounting policy [member] | IAS 12 update [member]
Profit after tax	£ 77	£ 84

Condensed consolidated cash flo

Condensed consolidated cash flow statement (unaudited) - GBP (£) £ in Millions		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018
Reconciliation of profit before tax to net cash flows from operating activities:
Profit (loss) before tax		£ 1,725	£ 725
Net decrease in cash and cash equivalents		(8,465)	(51,488)
Cash and cash equivalents at beginning of the period		167,357	204,452
Cash and cash equivalents at end of the period		158,892	152,964
Continuing operations [member]
Reconciliation of profit before tax to net cash flows from operating activities:
Profit (loss) before tax		1,725	725
Adjustments for non-cash items	[1]	314	2,360
Changes in operating assets and liabilities	[2]	(4,354)	(6,553)
Corporate income tax paid		(260)	(166)
Net cash from operating activities		(2,575)	(3,634)
Net cash transferred as part of the UK banking business disposal		0	39,703
Other investing activities		(9,094)	(6,030)
Net cash from investing activities		(9,094)	(45,733)
Net cash from financing activities		2,552	(2,057)
Effect of exchange rates on cash and cash equivalents		652	404
Net decrease in cash and cash equivalents		(8,465)	(51,020)
Discontinued operations [member]
Reconciliation of profit before tax to net cash flows from operating activities:
Net decrease in cash and cash equivalents		£ 0	£ (468)
[1]	As at 30 June 2018, £ 120 m was reclassified from n et cash from financing activities to a djustments for non cash items
[2]	As at 30 June 2018, £ 2.4 bn of cash equivalents were reclassified from c hanges in operating assets and liabilities to n et cash transferred as part of the UK business banking disposal

Condensed consolidated cash f_2

Condensed consolidated cash flow statement (unaudited) (Parenthetical) £ in Millions	Jun. 30, 2018GBP (£)
Disclosure of reclassifications or changes in presentation [line items]
Cash and cash equivalents	£ 152,964
Changes in operating assets and liabilities to Net cash transferred as part of the UK business banking disposal [member]
Disclosure of reclassifications or changes in presentation [line items]
Cash equivalents	2,400
Net cash from financing activities to Adjustments for non cash items [member]
Disclosure of reclassifications or changes in presentation [line items]
Cash and cash equivalents	£ 120

Basis of preparation

Basis of preparation	6 Months Ended
	Jun. 30, 2019
Basis of preparation
Basis of preparation	1 . Basis of preparation These condensed consolidated interim financial statements for the six months ended 30 June 2019 have been prepared in accordance with the DTR of the UK FCA and with IAS 34, Interim Financial Reporting, as published by the International Accounting Standards Board (IASB) and adopted by the EU. The condensed consolidated interim financial statements should be read in conjunction with the annual financial statem ents for the year ended 31 December 2018, which have been prepared in accordance with IFRSs as published by the IASB and as adopted by the EU. In April 2018, Barclays Bank PLC transferred its UK banking business to Barclays Bank UK PLC. The notes to the se interim financial statements do not include a Disposal note as there is no related activity in the current period. Relevant prior period comparative information is available in Note 2, Disposal of business and transfer of ownership of subsidiary on pages 161 to 163 in the Barclays Bank PLC Annual Report 2018. The accounting policies and methods of computation used in these condensed consolidated interim financial statements are the same as those used in the Barclays Bank PLC Annual Report 2018, except as discl osed below. IFRS 16 – Leases IFRS 16, Leases, which replaced IAS 17, Leases, was applied effective from 1 January 2019. IFRS 16 applies to all leases with the exception of licenses of intellectual property, rights held by licensing agreement within the s cope of IAS 38, Intangible Assets, service concession arrangements, leases of biological assets 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 Barclays Bank Group has decided to apply. IFRS 16 does not result in a significant change to lessor accounting; however, for lessee accou nting there is no longer a distinction between operating and finance leases. Lessees will be required to recognise both: A lease liability, measured at the present value of remaining cash 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 underlying 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 payments are made. The right of use asset will amortise to the income statement over the life of the lease. There is a recognition exemption in IFRS 16 for leases with a term not exceeding 12 months, which allows the lessee to apply similar accounting as an operating lease under IAS 17. The Barclays Bank Group appli ed IFRS 16 on a modified retrospective basis and took advantage of the option not to restate comparative periods. The Barclays Bank Group applied the following transition options available under the modified retrospective approach: To calculate the right of use ass et equal to the lease liability, adjusted for prepaid or accrued payments. To rely on the previous assessment of whether leases are onerous in accordance with IAS 37 immediately before the date of initial application as an alternative to performing an impa irment review. The Barclays Bank Group adjusted the carrying amount of the ROU asset at the date of initial application by the previous carrying amount of its onerous lease provision. To a pply the recognition exception for leases with a term not exceeding 12 months. To u se hindsight in determining the lease term if the contract contains options to extend or terminate the lease. The impact on adoption was an increase in property, plant and equipment of £ 0.5 bn, and an increase in other liabilities of £ 0.5 b n, with no material impact on retained earnings. IFRIC Interpretation 23 – Uncertainty over Income Tax Treatment IFRIC 23 clarifies the application of IAS 12 to accounting for income tax treatments that have yet to be accepted by tax authorities, in scenarios where it may be unclear how tax law applies to a particular transaction or circumstance, or whether a taxation authority will accept an entity’s tax treatment. IFRIC 23 has been applied from 1 January 2019. There was no significant effect from the adoption of IF RIC 23 in relation to accounting for uncertain tax positions. IAS 12 – Income Taxes – Amendments to IAS 12 The IASB amended IAS 12 in order to clarify the accounting treatment of the income tax consequences of dividends. As a result of the amendment, the tax consequences of all payments on financial instruments that are classified as equity for accounting purposes, where those payments are considered to be a distribution of profit, will be included in, and will reduce, the income statement tax charge. The amendments of IAS 12 were applied to the income tax consequences of dividends recognised on or after the beginning of the earliest comparative period . This resulted in reducing the tax charge and increasing profit after tax f or H119 by £ 77 m and H118 by £ 8 4 m. This change does not impact retained earnings. IAS 19 – Employee Benefits – Amendments to IAS 19 The IASB issued amendments to the guidance in IAS 19 , Employee Benefits, in connection with accounting for plan amendments, curtailments and settlements. The amendments have been applied to plan amendments, curtailments or settle ments occurring on or after 1 January 2019. There was no significant effect from the adoption of the amendments of IAS 19. Going concern Having reassessed the Principal Risks, the directors considered it appropriate to adopt the going concern basis of accounting in preparing the interim financial information. Other disclosures The Credit risk disclosures on pages 5 to 7 form part of these interim financial statements.

Segmental reporting

Segmental reporting	6 Months Ended
	Jun. 30, 2019
Segmental Reporting
Segmental Reporting	2 . Segmental reporting Analysis of results by business Corporate and Investment Bank Consumer, Cards and Payments Head Office Barclays Bank Group Half year ended 30.06.19 £m £m £m £m Total income 5,149 2,193 (220) 7,122 Credit impairment charges and other provisions (96) (396) (18) (510) Net operating income/(expenses) 5,053 1,797 (238) 6,612 Total operating expenses (3,615) (1,211) (84) (4,910) Other net income/(expenses) 1 15 16 (8) 23 Profit/(loss) before tax from continuing operations 1,453 602 (330) 1,725 As at 30.06.19 £bn £bn £bn £bn Total assets 882.1 73.1 14.1 969.3 Corporate and Investment Bank Consumer, Cards and Payments Head Office Barclays Bank Group Half year ended 30.06.18 £m £m £m £m Total income 5,373 2,137 (257) 7,253 Credit impairment releases/(charges) and other provisions 182 (343) 5 (156) Net operating income/(expenses) 5,555 1,794 (252) 7,097 Total operating expenses (3,628) (1,134) (1,622) (6,384) Other net income/(expenses) 1 8 17 (13) 12 Profit/(loss) before tax from continuing operations 1,935 677 (1,887) 725 As at 31.12.18 £bn £bn £bn £bn Total assets 792.5 71.6 13.6 877.7 Other net income/(expenses) represents the share of post-tax results of associates and joint ventures, profit (or loss) on disposal of subsidiaries, associates and joint ventures and gains on acquisitions . Split of income by geographic region 1 Half year ended Half year ended 30.06.19 30.06.18 £m £m UK 2,000 2,118 Europe 863 1,026 Americas 3,825 3,735 Africa and Middle East 75 62 Asia 359 312 Total 7,122 7,253 The geographic region is based on counterparty location .

Fee and commission income

Fee and commission income	6 Months Ended
	Jun. 30, 2019
Fee and commission income (expense) [abstract]
Fee and commission income	3 . F ee and commission income Fee and commission income is disaggregated below and includes a total for fees in scope of IFRS 15, Revenue from Contracts with Customers: Corporate and Investment Bank Consumer, Cards and Payments Head Office Total Half year ended 30.06.19 £m £m £m £m Fee type Transactional 185 1,168 - 1,353 Advisory 364 41 - 405 Brokerage and execution 512 24 - 536 Underwriting and syndication 1,240 - - 1,240 Other 62 124 16 202 Total revenue from contracts with customers 2,363 1,357 16 3,736 Other non-contract fee income 54 - - 54 Fee and commission income 2,417 1,357 16 3,790 Fee and commission expense (350) (611) - (961) Net fee and commission income 2,067 746 16 2,829 Corporate and Investment Bank Consumer, Cards and Payments Head Office Total Half year ended 30.06.18 £m £m £m £m Fee type Transactional 185 1,072 - 1,257 Advisory 340 37 - 377 Brokerage and execution 553 30 - 583 Underwriting and syndication 1,368 - - 1,368 Other 3 78 16 97 Total revenue from contracts with customers 2,449 1,217 16 3,682 Other non-contract fee income 55 - - 55 Fee and commission income 2,504 1,217 16 3,737 Fee and commission expense (337) (538) - (875) Net fee and commission income 2,167 679 16 2,862 Transactional fees are service charges on deposit accounts, cash management services and transactional processing fees. This includes interchange and merchant fee income generated from credit and bank card usage. Advisory fees are generated from asset management services and advisory services related to mergers, acquisitions and financial restructuring. Brokerage and execution fees are earned for executing client transactions with exchanges and over-the-counter markets and assisting clients in clearing transactions. 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.

Tax

Tax	6 Months Ended
	Jun. 30, 2019
Tax
Tax	4 . Tax The tax charge for H119 was £ 260 m (H118: £ 294 m), repres enting an effective tax rate of 15.1 % (H118: 40.6 %). The effective tax rate for H119 was substantially lower than H118, primarily due to charges for litigation and conduct in H118 which were non-deductible for tax purposes. From 2019, a change in accounting standards has required tax relief on payments made under AT 1 instruments, which in prior periods was recognised in retained earnings, to be recognised in the income statement. Excluding this accounting change, the Barclays Bank Group’s effective tax rate would have been 19.5 %. Assets Liabilities As at As at As at As at 30.06.19 31.12.18 30.06.19 31.12.18 Current and deferred tax assets and liabilities £m £m £m £m Current tax 2,041 1,713 (613) (621) Deferred tax 2,677 2,970 (332) - Total 4,718 4,683 (945) (621) As at As at 30.06.19 31.12.18 Deferred tax assets and liabilitites £m £m USA 2,293 2,541 UK - 3 Other 384 426 Deferred tax assets 2,677 2,970 Deferred tax liabilities - UK (332) - Analysis of deferred tax assets Temporary differences 2,289 2,441 Tax losses 388 529 Deferred tax assets 2,677 2,970

Non-controlling interests

Non-controlling interests	6 Months Ended
	Jun. 30, 2019
Non-controlling interests [abstract]
Non-controlling interests	5 . Non-controlling interests Profit attributable to non-controlling interests Equity attributable to non-controlling interests Half year ended Half year ended As at As at 30.06.19 30.06.18 30.06.19 31.12.18 £m £m £m £m Other non-controlling interests - (1) 2 2

Dividends on ordinary shares

Dividends on ordinary shares	6 Months Ended
	Jun. 30, 2019
Dividends on ordinary shares [abstract]
Dividends on ordinary shares	5 . Dividends on o rdinary s hares Half year ended 30.06.19 Half year ended 30.06.18 Dividends paid during the period £m £m Ordinary shares 1 - 14,168 Preference shares 27 106 Total 27 14,274 H118 included the dividend in specie of £ 14 bn paid to Barclays PLC for transferring the equity ownership in Barclays Bank UK PLC . A half year dividend for 2019 of £ 233 m will be paid on 16 September 2019.

Fair value of financial instrum

Fair value of financial instruments	6 Months Ended
	Jun. 30, 2019
Fair value of financial instruments
Fair value of financial instruments	7 . Fair v alue of financial i nstruments This section should be read in conjunction with Note 18, Fair value of financial instruments of the Barclays Bank PLC Annual Report 2018 and Note 1 , Basis of preparation on pages [ 19 to 20 ] , which provides more detail about accounting policies adopted, valuation methodologies used in calculating fair value and the valuation control framework which governs oversight of valuations. There have been no changes in the accounting policies adopted or the valuation methodologies used. Valuation The following table shows Barclays Bank Group’s assets and liabilities that are held at fair value disaggregated by valuation technique (fair value hierarchy) and balance sheet classification: Valuation technique using Quoted market prices Observable inputs Significant unobservable inputs (Level 1) (Level 2) (Level 3) Total As at 30.06.19 £m £m £m £m Trading portfolio assets 58,369 58,108 3,548 120,025 Financial assets at fair value through the income statement 10,586 141,970 3,687 156,243 Derivative financial instruments 6,004 232,717 5,701 244,422 Financial assets at fair value through other comprehensive income 19,113 36,573 170 55,856 Investment property - - 8 8 Total assets 94,072 469,368 13,114 576,554 Trading portfolio liabilities (24,439) (16,890) (6) (41,335) Financial liabilities designated at fair value (98) (229,493) (284) (229,875) Derivative financial instruments (5,728) (232,477) (4,799) (243,004) Total liabilities (30,265) (478,860) (5,089) (514,214) As at 31.12.18 Trading portfolio assets 51,029 49,396 3,613 104,038 Financial assets at fair value through the income statement 8,918 131,682 4,650 145,250 Derivative financial instruments 6,813 210,655 5,215 222,683 Financial assets at fair value through other comprehensive income 15,751 28,888 355 44,994 Investment property - - 9 9 Total assets 82,511 420,621 13,842 516,974 Trading portfolio liabilities (19,401) (17,210) (3) (36,614) Financial liabilities designated at fair value (76) (217,404) (261) (217,741) Derivative financial liabilities (6,152) (208,697) (4,743) (219,592) Total liabilities (25,629) (443,311) (5,007) (473,947) The following table shows Barclays Bank Group’s assets and liabilities that are held at fair value disaggregated by valuation technique (fair value hierarchy) and product type: Assets Liabilities Valuation technique using Valuation technique using Quoted market prices (Level 1) Observable inputs (Level 2) Significant unobservable inputs (Level 3) Quoted market prices (Level 1) Observable inputs (Level 2) Significant unobservable inputs (Level 3) As at 30.06.19 £m £m £m £m £m £m Interest rate derivatives - 152,892 2,320 - (145,912) (2,071) Foreign exchange derivatives - 56,187 209 - (57,976) (289) Credit derivatives - 11,565 1,448 - (11,626) (369) Equity derivatives 6,004 10,871 1,711 (5,728) (15,801) (2,057) Commodity derivatives - 1,202 13 - (1,162) (13) Government and government sponsored debt 46,619 56,909 2 (11,321) (11,755) - Corporate debt - 18,827 616 - (5,671) (6) Certificates of deposit, commercial paper and other money market instruments - 554 - - (7,939) (21) Margin lending - 15,306 - - (23,860) - Reverse repurchase and repurchase agreements - 123,464 13 - (148,870) - Non-asset backed loans - 7,349 4,071 - - - Asset backed securities - 3,157 669 - (28) - Issued debt - - - - (47,402) (263) Equity cash products 41,347 10,190 357 (13,118) (804) - Private equity investments 4 - 185 - - - Other 1 98 895 1,500 (98) (54) - Total 94,072 469,368 13,114 (30,265) (478,860) (5,089) As at 31.12.18 Interest rate derivatives - 122,975 2,478 - (118,231) (2,456) Foreign exchange derivatives - 63,960 192 - (63,897) (185) Credit derivatives - 9,374 1,381 - (9,188) (331) Equity derivatives 6,813 12,933 1,136 (6,152) (16,001) (1,743) Commodity derivatives - 1,413 28 - (1,380) (28) Government and government sponsored debt 38,910 47,882 14 (8,143) (11,154) - Corporate debt - 14,529 456 - (5,085) - Certificates of deposit, commercial paper and other money market instruments - 1,135 - - (8,556) (10) Margin lending - 10,388 - - (26,875) - Reverse repurchase and repurchase agreements - 118,623 768 - (139,361) - Non-asset backed loans - 7,378 4,452 - - - Asset backed securities - 2,265 688 - (245) - Issued debt - - - - (42,104) (251) Equity cash products 36,705 7,195 698 (11,258) (1,181) (3) Private equity investments 7 - 190 - - - Other 1 76 571 1,361 (76) (53) - Total 82,511 420,621 13,842 (25,629) (443,311) (5,007) Other includes commercial real estate loans, fund and fund-linked products, asset backed loans, physical commodities and investment property . Assets and liabilities reclassified between Level 1 and Level 2 During the period, there were no material transfers between Level 1 and Level 2 (period ended December 2018: no material transfers between Level 1 and Level 2). Level 3 movement analysis The following table summarises the movements in the balances of Level 3 assets and liabilities during the period. The table shows gains and losses and includes amounts for all financial assets and liabilities that are held at fair value transferred to and from Level 3 during the period. Transfers have been reflected as if they had taken place at the beginning of the year. Asset and liability moves between Level 2 and Level 3 are primarily due to i) an increase or decrease in o bservable market activity related to an input or ii) a change in the significance of the unobservable input, with assets and liabilities classified as Level 3 if an unobservable input is deemed significant. Level 3 movement analysis Purchases Sales Issues Settlements Total gains and losses in the period recognised in the income statement Transfers As at 30.06.19 As at 01.01.19 Trading income Other income In Out £m £m £m £m £m £m £m £m £m £m Government and government sponsored debt 14 2 - - - - - - (14) 2 Corporate debt 388 70 (24) - (31) 14 - 32 (74) 375 Non-asset backed loans 2,263 1,235 (1,260) - (19) 12 - 19 (90) 2,160 Asset backed securities 664 81 (127) - - 5 - 16 (29) 610 Equity cash products 136 48 (13) - - (2) - 116 (20) 265 Other 148 - - - (1) (10) - - (1) 136 Trading portfolio assets 3,613 1,436 (1,424) - (51) 19 - 183 (228) 3,548 Non-asset backed loans 1,836 2 - - (132) 70 - - (1) 1,775 Equity cash products 559 9 - - (10) 4 178 - - 740 Private equity investments 191 4 (3) - (1) - (6) - - 185 Other 2,064 2,334 (2,619) - (2) 17 9 24 (840) 987 Financial assets at fair value through the income statement 4,650 2,349 (2,622) - (145) 91 181 24 (841) 3,687 Non-asset backed loans 353 48 - - (55) - - - (218) 128 Asset backed securities - 40 - - - - - - - 40 Equity cash products 2 - - - - - - - - 2 Financial assets at fair value through other comprehensive income 355 88 - - (55) - - - (218) 170 Investment property 9 - - - - - (1) - - 8 Trading portfolio liabilities (3) - - - - 2 - (5) - (6) Certificates of deposit, commercial paper and other money market instruments (10) - - - 1 - (1) (11) - (21) Issued debt (251) - - (16) 1 5 - (3) 1 (263) Financial liabilities designated at fair value (261) - - (16) 2 5 (1) (14) 1 (284) Interest rate derivatives 22 (3) - - 76 116 - (107) 145 249 Foreign exchange derivatives 7 - - - (12) (41) - (51) 17 (80) Credit derivatives 1,050 (63) 4 - (3) 86 - 2 3 1,079 Equity derivatives (607) (122) (5) - 23 89 - (16) 292 (346) Commodity derivatives - - - - - - - - - - Net derivative financial instruments 1 472 (188) (1) - 84 250 - (172) 457 902 Total 8,835 3,685 (4,047) (16) (165) 367 179 16 (829) 8,025 Derivative financial instruments are represented on a net basis. On a gross basis, derivative financial assets were £ 5,701 m and derivative financial liabilities were £ 4,799 m. Level 3 movement analysis Purchases Sales Issues Settle- ments Total gains and losses in the period recognised in the income statement Transfers As at 30.06.18 As at 01.01.18 Trading income Other income In Out £m £m £m £m £m £m £m £m £m £m Government and government sponsored debt 49 11 - - - - - - (35) 25 Corporate debt 871 35 (17) - (23) 6 - 15 (6) 881 Non-asset backed loans 166 2,239 (239) - - 2 - 11 (6) 2,173 Asset backed securities 627 100 (99) - - (11) - 5 (30) 592 Equity cash products 68 - (7) - - 35 - 75 (52) 119 Other 196 4 (4) - (10) (21) - 24 (138) 51 Trading portfolio assets 1,977 2,389 (366) - (33) 11 - 130 (267) 3,841 Non-asset backed loans 6,073 16 (4,432) - (238) 4 - - (4) 1,419 Equity cash products 8 11 - - - - - - - 19 Private equity investments 688 295 (37) - - - 53 - (14) 985 Other 750 2,359 (1,967) - - 4 110 - - 1,256 Financial assets at fair value through the income statement 7,519 2,681 (6,436) - (238) 8 163 - (18) 3,679 Equity cash products 36 - (17) - - - - - (18) 1 Private equity investments 129 - (12) - - - - - (14) 103 Other 40 - (39) - - - - - - 1 Financial assets at fair value through other comprehensive income 205 - (68) - - - - - (32) 105 Investment property 116 - (104) - (5) - 4 - - 11 Trading portfolio liabilities (4) - 2 - - - - 2 - - - Certificates of deposit, commercial paper and other money market instruments (250) - 202 - - - - - - (48) Issued debt (214) - - (4) 4 19 - (219) 125 (289) Other (16) - 16 - 2 - (2) - - - Financial liabilities designated at fair value (480) - 218 (4) 6 19 (2) (219) 125 (337) Interest rate derivatives (150) - - - 96 (46) - (343) 58 (385) Foreign exchange derivatives 37 - - - (17) (30) - 8 (18) (20) Credit derivatives 1,146 2 3 - (15) (210) - 1 (2) 925 Equity derivatives (896) 22 (431) - 221 129 - 33 175 (747) Net derivative financial instruments 1 137 24 (428) - 285 (157) - (301) 213 (227) Total 9,470 5,094 (7,182) (4) 15 (119) 165 (388) 21 7,072 Derivative financial instruments are presented on a net basis. On a gross basis, derivative financial assets were £ 5,066 m and derivative financial liabilities were £ 5,293 m. Unrealised g ains and losses on Level 3 financial assets and liabilities The following table discloses the unrealised gains a nd losses recognised in the period arising on Level 3 financial assets and liabilities held at the pe riod end. Half year ended 30.06.19 Half year ended 30.06.18 Income statement Total Income statement Total Trading income Other income Trading income Other income £m £m £m £m £m £m Trading portfolio assets 21 - 21 (3) - (3) Financial assets at fair value through the income statement 75 178 253 7 116 123 Investment properties - (1) (1) - - - Trading portfolio liabilities 2 - 2 - - - Financial liabilities designated at fair value 6 - 6 18 - 18 Net derivative financial instruments 212 - 212 (155) - (155) Total 316 177 493 (133) 116 (17) Valuation techniques and sensitivity analysis Sensitivity analysis is performed on products with significant unobservable inputs (Level 3) to generate a range of reasonably possible alternative valuations. The sensitivity methodologies applied take account of the nature of valuation techniques used, as well as the availability and reliability of observable proxy and historical data and the impact of using alternative models. Sensitivity analysis of valuations using unobservable inputs As at 30.06.19 As at 31.12.18 Favourable changes Unfavourable changes Favourable changes Unfavourable changes £m £m £m £m Interest rate derivatives 52 (118) 80 (162) Foreign exchange derivatives 11 (14) 7 (10) Credit derivatives 125 (79) 126 (73) Equity derivatives 107 (108) 110 (112) Commodity derivatives 1 (1) 1 (1) Corporate debt 12 (10) 10 (2) Non-asset backed loans 138 (241) 141 (210) Equity cash products 130 (173) 121 (155) Private equity investments 6 (7) - (10) Other 1 2 (2) 2 (2) Total 584 (753) 598 (737) Other includes commercial real estate loans, fund and fund-linked products, asset backed loans, physical commodities and investment property . The effect of stressing unobservable inputs to a range of reasonably possible alternatives alongside considering the impact of using alternative models, would be to increase fair values by up to £ 584 m (December 2018: £ 598 m) or to decrease fair values by up to £ 753 m (December 2018: £ 737 m) with all the effect impacting profit and loss . Significant unobservable inputs The valuation techniques and significant unobservable inputs for assets and liabilities recognised at fair value and classified as Level 3 are consistent with Note 18, F air value of financial instruments in the Barclays Bank PLC Annual Report 2018 . The description of the significant unobservable inputs and the sensitivity of fair value measurement of the instruments categorised as Level 3 assets or liabilities to increases in significant unobse rvable inputs is also found in N ote 1 8, F air value of financial instruments of the Barclays Bank PLC Annual Report 2018 . Fair value adjustments Key balance sheet valuation adjustments are quantified below: As at As at 30.06.19 31.12.18 £m £m Exit price adjustments derived from market bid-offer spreads (448) (451) Uncollateralised derivative funding (60) (47) Derivative credit valuation adjustments (149) (125) Derivative debit valuation adjustments 192 237 Uncollateralised derivative funding in creased by £ 13 m to £ 60 m as a result of changes in underlying derivative exposures Derivative c r edit valuation a djustments increased by £ 24 m to £ 149 m as a result of changes in underlying derivative exposures Derivative debit valuation adjustments de creased by £ 45 m to £ 192 m as a result of tightening in Barclays’ credit spreads Portfolio exemption Barclays Bank Group uses the portfolio exemption in IFRS 13 , Fair Value Measurement to measure the fair value of groups of financial assets and liabilities. Instruments are measured using the price that would be received to sell a net long position (i.e. an asset) for a particular risk exposure or to transfer a net short position (i.e. a liability) for a particular risk exposure in an orderly transaction between market participants a t the balance sheet date under current ma rket conditions. Accordingly, the B arclays B ank Group measures the fair value of the group of financial assets and liabilities consistently with how market participants would price the net risk exposure at the measu rement date. Unrecognised gains as a result of the use of valuation models using unobservable inputs The amount that has yet to be recognised in income that relates to the difference between the transaction price (the fair value at initial recognition) and the amount that would have arisen had valuation models using unobservable inputs been used on initial recognition, less amounts subsequently recognised, is £ 106 m (December 2018: £ 127 m) for financial instruments measured at fair value and £ 32 m (December 2018: £ 31 m) for financial instruments carried at amortised cost. The de crease in financial instruments measured at fair value of £ 21 m (December 2018: £ 32 m increase ) was driven by additions of £ 23 m (December 2018: £ 65 m) offset by a transfer out of £ nil (December 2018: £ 15 m) to Barclays Bank UK PLC and £ 44 m (December 2018: £ 18 m) of amortisation and releases. The in crease of £ 1 m (December 2018: £ 222 m decrease ) in financial instruments carried at amortised cost was driven by the transfer out of £ nil (December 2018: £ 222 m) to Barclays Bank UK PLC and £ nil (December 2018: £ 2 m) of amortisation and releases offset by additions of £ 1 m (December 2018: £ 2 m). Third party credit enhancements Structured and brokered certificates of deposit issued by Barclays Bank Group are insured up to $250,000 per depositor by the Federal Deposit Insurance Corporation (FDIC) in the United States. The FDIC is funded by premiums that the Barclays Bank Group and other banks pay for deposit insurance coverage. The carrying value of these issued certificates of deposit that are designated under the IFRS 9 fair value option includes this third party credit enhancement. The on-balance sheet value of these brokered certificates of deposit amounted to £ 4,452 m (December 2018: £ 4,797 m). Comparison of carrying amounts and fair values for assets and liabilities not held at fair value Valuation methodologies employed in calculating the fair value of financial assets and liabilities measured at amortised cost are consistent with the Barclays Bank PLC Annual Report 2018 disclosure. The following table summarises the fair value of financial assets and liabilities measured at amortised cost on the Barclays Bank Group’s balance sheet: As at 30.06.19 As at 31.12.18 Carrying amount Fair value Carrying amount Fair value Financial assets £m £m £m £m Loans and advances at amortised cost - Home loans 12,818 12,242 13,160 12,592 - Credit cards, unsecured loans and other retail lending 34,035 34,951 31,921 33,115 - Finance lease receivables 2,035 2,178 1,886 2,057 - Corporate loans 95,776 95,053 89,992 89,671 Reverse repurchase agreements and other similar secured lending 7,865 7,865 1,613 1,613 Financial liabilities Deposits at amortised cost - Banks (19,579) (19,579) (15,569) (15,569) - Current and demand accounts (78,961) (78,961) (77,264) (77,264) - Savings accounts (27,008) (27,008) (26,980) (26,980) - Other time deposits (89,577) (89,569) (79,524) (79,524) Repurchase agreements and other similar secured borrowing (5,992) (5,992) (7,378) (7,378) Debt securities in issue (42,251) (42,247) (39,063) (39,083) Subordinated liabilities (36,368) (36,905) (35,327) (36,174)

Subordinated liabilities

Subordinated liabilities	6 Months Ended
	Jun. 30, 2019
Subordinated liabilities [abstract]
Subordinated liabilities	8. Subordinated liabilities Half year ended Year ended 30.06.19 31.12.18 £m £m Opening balance as at 1 January 35,327 24,193 Issuances 4,508 221 Redemptions (4,321) (3,246) Other 854 14,159 Closing balance 36,368 35,327 Issuances of £ 4,508 m include £ 3,396 m intra-group loans from Barclays PLC and $ 1,300 m 5.088 % Fixed-to-Floating Rate Subordinated Notes (£ 1,035 m) issued intra-group to Barclays PLC as well as £ 77 m externally issued USD Floating Rate N otes. Redemptions totalling £ 4,321 m include £ 3,000 m externally issued 1 4 % Step-up Callable Perpetual Reserve Capital Instrument s , £ 1,230 m 4.375 % Fixed Rate intra-group loans from Barclays PLC and £ 77 m externally issued USD Floating Rate N otes . Barclays Securities J apan Limi ted redeemed two externally issued JPY 1,000 m dated loans during the period, totalling £ 14 m. Other movements in the six months ended 30 June 2019 predominantly include fair value hedge adjustments , accrued interest and foreign exchange rate movements.

Provisions

Provisions	6 Months Ended
	Jun. 30, 2019
Provisions [abstract]
Provisions	9. Provisions As at As at 30.06.19 31.12.18 £m £m Customer redress 104 127 Legal, competition and regulatory matters 224 411 Redundancy and restructuring 71 68 Undrawn contractually committed facilities and guarantees 236 217 Onerous contracts 18 90 Sundry provisions 201 214 Total 854 1,127

Retirement benefits

Retirement benefits	6 Months Ended
	Jun. 30, 2019
Disclosure of defined benefit plans [abstract]
Retirement benefits	10 . Retirement b enefit s As at 30 June 2019, Barclays Bank Group’s IAS 19 pension surplus across all schemes was £ 1.6 bn (December 2018: £ 1.5 bn). The UK Retirement Fund (UKRF), which is Barclays Bank Group’s main scheme, had an IAS 19 pension surplus of £ 1.8 bn (December 2018: £ 1.7 bn). The movement for the UKRF was driven by higher than assumed asset returns and payment of a deficit reduction contribution, offset by a decrease in the discount rate. UKRF funding valuations T he Scheme A ctuary prepares an annual update of the UKRF funding position in addition to the full triennial actuarial valuation. The latest annual update was carried out as at 30 September 2018 and showed a deficit of £ 4.0 bn and a funding level of 88.4 %. The last triennial actuarial valuation of the UKRF had an effective date of 30 September 2016 and was completed in July 2017. This valuation showed a funding deficit of £ 7.9 bn and a funding level of 81.5 %. The improvement in funding position between 30 S eptember 2016 and 30 September 2018 was largely due to payment of deficit reduction contributions, higher than assumed asset returns, higher government bond yields and transfers out of the scheme. The recovery plan agreed as part of the 2016 triennial act uarial valuation requires Barclays Bank PLC to pay deficit reduction contributions of £0.5bn per annum between 2018 and 2020, followed by £1.0bn per annum between 2021 and 2026. The deficit reduction contributions are in addition to the regular contributio ns to meet the Barclays Group’s share of the cost of benefits accruing over each year. The agreement with the UKRF Trustee also takes into account the changes to the Barclays Group structure that were implemented as a result of ring-fencing. Barclays Bank PLC remains as the principal employer of the UKRF. Additional support measures agreed include a collateral arrangement, joint participation of Barclays Bank UK PLC until 2025, and support from Barclays PLC should Barclays Bank PLC not pay the deficit reduc tion contributions to the UKRF. The next triennial actuarial valuation of the UKRF is due to be completed in 2020 with an effective date of 30 September 2019.

Called up share capital

Called up share capital	6 Months Ended
	Jun. 30, 2019
Called up share capital
Called up share capital	11 . Called up share capital Ordinary shares A s a t 30 June 201 9 the issued ordinary share capital of Barclays Bank PLC comprised 2,342 million ( December 2018 : 2,342 million) ordinary shares of £ 1 each. Preference share s A s a t 30 June 201 9 the issued preference share capital of Barclays Bank PLC of £ 6 m (December 2018: £ 6 m) comprised 1,000 Sterling Preference Shares of £ 1 each ( December 201 8 : 1,000 ); 31,856 Euro Preference Shares of € 100 each ( December 201 8 : 31,856 ); and 58,133 US Do llar Preference shares of $ 100 each ( December 201 8 : 58,13 3 ). There was no issuance or redemption of ordinary or preference shares in the six months ended on 30 June 2019.

Other equity instruments

Other equity instruments	6 Months Ended
	Jun. 30, 2019
Other equity instruments
Other equity instruments	12 . Other equity instruments Other equity instruments of £ 9,4 02 m ( December 2018: £ 7,595 m) include AT1 securities issued to Barclays PLC by Barclays Bank PLC . There have been two issuances to Barclays PLC in the period, $ 2.0 bn 8 % Fixed Rate Resetting Perpetual Subordinated Contingent Convertible Securities and £ 300 m 7.125 % Fixed Rate Resetting Perpetual Subordinated Contingent Convertible Securities. The AT1 securities are perpetual securities with no fixed maturity and are structured to qua lify as AT1 instruments under CR R . AT1 securities are undated and are repayable, at the option of Barclays Bank PLC, in whole at the initial call date, or on any fifth anniversary after the initial call date. In addition, the AT1 securities are repayable, at t he option of Barclays Bank PLC, in whole in the event of certain changes in the tax or regulatory treatment of the securities. Any repayments require the prior consent of the PRA.

Other reserves

Other reserves	6 Months Ended
	Jun. 30, 2019
Other reserves [abstract]
Other reserves	13. Other reserves As at As at 30.06.19 31.12.18 £m £m Currency translation reserve 4,159 3,927 Fair value through other comprehensive income reserve 61 (298) Cash flow hedging reserve 489 (123) Own credit reserve (77) (121) Other reserves (24) (24) Total 4,608 3,361 Currency t ranslation r eserve The currency translation reserve represents the cumulative gains and losses on the retranslation of Barclays Bank Group’s net investment in foreign operations, net of the effects of hedging. As at 30 June 2019 , there was a credit balance of £4,159 m (December 2018 : £3,927m credit) in the currency tr anslation reserve. The £232 m credit movement principally reflected the strengthening of period end USD against GBP . Fair value through other comprehensive income reserve The fair value through other comprehensive income reserve represents the unrealised change in the fair value through other comprehensive income investments since initial recognition. As at 30 June 2019, there was a credit balance of £61m (December 2018: £298m debit) in the fair value through other comprehensive income reserve. The gain of £359m is principally reflected by a £679m gain from the increase in fair value of bonds due to decreasing bond yields , partially offset by £200m of net gains transferred to net profit and a tax charge of £120m. Cash f low h edg ing r eserve The cash flow hedging reserve represents the cumulative gains and losses on effective cash flow hedging instruments that will be recycled to the income statement when the hedged transactions affect profit or loss. As at 30 June 2019, there was a credit balance of £48 9 m (December 2018: £123m debit) in the c ash flow hedgi ng reserve. The increase of £612 m principally reflected a £844 m in crease in the fair value of interest rate swaps held for hedging purposes as interes t ra te curves decreased partially offset by £31 m of g ains transferred to net profit and a tax charge of £20 4 m. Own credit r eserve The own credit reserve reflects the cumulative own credit gains and losses on financial liabilities at fair value. Amou nts in the own credit reserve are not recycled to profit or loss in future periods. As at 30 June 2019, there was a debit balance of £77m (December 2018: £121m debit) in the own credit reserve. The movement of £44m is principally reflected by a £68m gain from the widening of Barclays’ funding spreads offset by tax of £24m . Other reserves As at 30 June 2019 , there was a debit balance of £24 m (December 2018 : £24m debit) in other reserves relating to redeemed ordinary and preference shares issued by Barclays Bank Group .

Contingent liabilities and comm

Contingent liabilities and commitments	6 Months Ended
	Jun. 30, 2019
Contingent liabilities and commitments [abstract]
Contingent liabilities and commitments	14 . Contingent liabilities and commitments As at As at 30.06.19 31.12.18 Contingent liabilities £m £m Guarantees and letters of credit pledged as collateral security 16,106 15,046 Performance guarantees, acceptances and endorsements 5,771 4,348 Total 21,877 19,394 Commitments Documentary credits and other short-term trade related transactions 1,273 1,741 Standby facilities, credit lines and other commitments 270,192 256,027 Total 271,465 257,768 In addition to the above, Note 15 , Legal, competition and regulatory matters details out further contingent liabilities where it is not practicable to disclose an estimate of the potential financial effect on Barclays Bank Group .

Legal, competition and regulato

Legal, competition and regulatory matters	6 Months Ended
	Jun. 30, 2019
Legal, competition and regulatory matters
Legal, competition and regulatory matters	15 . Legal, competition and regulatory matters Barclays Bank PLC and the Barclays Bank Group face legal, competition and regulatory challenges, many of which are beyond our control. The extent of the impact on Barclays 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. Investigations into c ertain advisory services a greements and other matters and civil action The UK Serious Fraud Office (SFO), the Financial Conduct Authority (FCA), the US Department of Justice (DoJ) and the US Securities and Ex change Commission (SEC) have been conducting investigations into two advisory services agreements entered into by Barclays Bank PLC. These agreements were entered into with Qatar Holding LLC in June and October 2008 (the Agreements). The FCA commenced an i nvestigation into whether the Agreements may have related to Barclays PLC’s capital raisings in June and November 2008 (the Capital Raisings). The existence of the June 2008 advisory services agreement was disclosed, but the entry into the advisory service s agreement in October 2008 and the fees payable under the Agreements, which amounted to a total of £322m payable over a period of five years, were not disclosed in the announcements or public documents relating to the Capital Raisings. The SFO also commen ced an investigation into the Agreements and into a $3bn loan (the Loan) provided by Barclays Bank PLC in November 2008 to the State of Qatar. In May 2018, the Crown Court dismissed all charges against Barclays PLC and Barclays Bank PLC brought by the SFO, and in October 2018, the High Court denied the SFO’s application to reinstate the charges, which were consequently dismissed. FCA Proceedings and other investigations In 2013, the FCA issued warning notices (the Notices) finding that, while Barclays PLC and Barclays Bank PLC believed at the time of the execution of the Agreements that there should be at least some unspecified and undetermined value to be derived from them, the primary purpose of the Agreements was not to obtain advisory services but to ma ke additional payments, which would not be disclosed, for the Qatari participation in the Capital Raisings. The Notices concluded that Barclays PLC and Barclays Bank PLC were in breach of certain disclosure-related listing rules and Barclays PLC was also i n breach of Listing Principle 3 (the requirement to act with integrity towards holders and potential holders of the Company’s shares). In this regard, the FCA considers that Barclays PLC and Barclays Bank PLC acted recklessly. The financial penalty provide d in the Notices against Barclays is £50m. Barclays PLC and Barclays Bank PLC continue to contest the findings. The FCA action has been stayed due to the SFO proceedings pending against certain former Barclays executives. In addition, the DoJ and the SEC have been conducting investigations relating to the Agreements. Civil Action In 2016, PCP Capital Partners LLP and PCP International Finance Limited (PCP) served a claim on Barclays Bank PLC seeking damages for fraudulent misrepresentation and deceit, ar ising from alleged statements made by Barclays Bank PLC to PCP in relation to the terms on which securities were to be issued to potential investors, allegedly including PCP, in the November 2008 capital raising. PCP seeks damages of approximately £1.6bn ( plus interest from November 2017) and costs. Barclays Bank PLC is defending the claim and trial is scheduled to commence in June 2020. Claimed amounts/Financial impact It is not currently practicable to provide an estimate of the financial impact of the a ctions described on Barclays or what effect they might have upon Barclays’ operating results, cash flows or financial position in any particular period. The financial penalty provided in the FCA’s Notices and the amount of PCP’s claim do not necessarily re flect Barclays’ potential financial exposure in respect of these matters. Investigations into certain business relationships In 2012, the DoJ and SEC commenced investigations in relation to whether certain relationships with third parties who assist Barcl ays PLC to win or retain business are compliant with the US Foreign Corrupt Practices Act. Various regulators in other jurisdictions are also being briefed on the investigations. Separately, Barclays has been cooperating with the DoJ and SEC in relation to an investig ation into certain of its hiring practices in Asia and elsewhere and is keeping certain regulators in other jurisdictions informed . Barclays is in advanced discussions to resolve this matter . Claimed amounts/Financial impact Barclays does not expect the financial impact of the matters described above to be material to the Group’s operating results, cash flows or financial position. Investigations into LIBOR and other b enchmarks Regulators and law enforcement agencies, includ ing certain competition authorities, from a number of governments have been conducting investigations relating to Barclays Bank PLC’s involvement in manipulating certain financial benchmarks, such as LIBOR and EURIBOR. Barclays PLC, Barclays Bank PLC and B arclays Capital Inc. (BCI) have reached settlements with a number of regulators and law enforcement agencies. Barclays Bank PLC continues to respond to requests for information from the SFO in relation to its ongoing LIBOR investigation, including in respe ct of Barclays Bank PLC. Claimed amounts/Financial impact Aside from the settlements described above, it is not currently practicable to provide an estimate of any further financial impact of the actions described on Barclays or what effect they might have upon Barclays’ operating results, cash flows or financial position in any particular period. LIBOR and other b enchmark c ivil a ctions Various individuals and corporates in a range of jurisdictions have threatened or brought civil actions against Barcl ays and other banks in relation to LIBOR and/or other benchmarks. While certain cases have been dismissed, settled or settled subject to final approval from the relevant court (and in the case of class actions, the right of class members to opt out of the settlement and to seek to file their own claims) , other actions remain pending and their ultimate impact is unclear. USD LIBOR Cases in the Multidistrict Litigation Court The majority of the USD LIBOR cases, which have been filed in various US jurisdicti ons, have been consolidated for pre-trial purposes before a single judge in the US District Court in the Southern District of New York (SDNY). The complaints are substantially similar and allege, amongst other things, that Barclays PLC, Barclays Bank PLC, BCI and other financial institutions individually and collectively violated provisions of the US Sherman Antitrust Act (Antitrust Act), the US Commodity Exchange Act (CEA), the US Racketeer Influenced and Corrupt Organizations Act (RICO), the Securities E xchange Act of 1934 and various state laws by manipulating USD LIBOR rates. Certain of the proposed class actions have been settled. Barclays has settled claims purportedly brought on behalf of plaintiffs that (i) engaged in USD LIBOR-linked over-the-coun ter transactions (OTC Class); (ii) purchased USD LIBOR-linked financial instruments on an exchange; (iii) purchased USD LIBOR-linked debt securities; or (iv) issued loans linked to USD LIBOR (Lender Class) and paid $ 120m, $20m, $7.1m and $4m respectively. The settlements with the OTC Class and the Lender Class have received final court approval. Th e other settlements remain subject to final court approval and/or the right of class members to opt out of the settlement and to seek to file their own claims. T he remaining putative class actions and individual actions seek unspecified damages with the exception of five lawsuits, in which the plaintiffs are seeking a combined total in excess of $1.25bn in actual damages against all defendants, including Barclays Bank PLC, plus punitive damages. Some of the lawsuits also seek trebling of damages under the Antitrust Act and RICO. Additional USD LIBOR Cases in the SDNY In 2015, an individual action against Barclays Bank PLC and other panel bank defendants was dismis sed by the SDNY. The plaintiff alleged that the panel bank defendants conspired to increase USD LIBOR, which caused the value of bonds pledged as collateral for a loan to decrease, ultimately resulting in the sale of the bonds at a low point in the market. In March 2018, the court denied the plaintiff’s motion for leave to amend its complaint and dismissed the case. The plaintiff’s appeal of the court’s order has been dismissed. Beginning in January 2019, several putative class actions were filed in the SD NY against Barclays PLC, Barclays Bank PLC, BCI, other financial institution defendants and Intercontinental Exchange Inc. and certain of its affiliates (ICE), asserting antitrust and unjust enrichment claims on allegations that, beginning in 2014, defenda nts manipulated USD LIBOR through defendants’ submissions to ICE, which took over rate-setting duties for LIBOR from the British Bankers' Association in 2014. These actions have been consolidated. Sterling LIBOR Case in SDNY In 2015, a putative class act ion was filed in the SDNY against Barclays Bank PLC and other Sterling LIBOR panel banks by a plaintiff involved in exchange-traded and over-the-counter derivatives that were linked to Sterling LIBOR. The complaint alleges, among other things, that the def endants manipulated the Sterling LIBOR rate between 2005 and 2010 and, in so doing, committed CEA, Antitrust Act, and RICO violations. In 2016, this class action was consolidated with an additional putative class action making similar allegations against B arclays Bank PLC and BCI and other Sterling LIBOR panel banks. The defendants’ motion to dismiss was granted in December 2018. The plaintiff has asked the court to reconsider this decision. Japanese Yen LIBOR Cases in SDNY In 2012, a putative class actio n was filed in the SDNY against Barclays Bank PLC and other Japanese Yen LIBOR panel banks by a plaintiff involved in exchange-traded derivatives. The complaint also names members of the Japanese Bankers Association’s Euroyen Tokyo Interbank Offered Rate ( Euroyen TIBOR) panel, of which Barclays Bank PLC is not a member. The complaint alleges, amongst other things, manipulation of the Euroyen TIBOR and Yen LIBOR rates and breaches of the CEA and Antitrust Act between 2006 and 2010. In 2014, the court dismiss ed the plaintiff’s antitrust claims in full, but the plaintiff’s CEA claims remain pending. Discovery is ongoing. In 2017, a second putative class action concerning Yen LIBOR which was filed in the SDNY against Barclays PLC, Barclays Bank PLC and BCI was dismissed in full. The complaint makes similar allegations to the 2012 class action. The plaintiffs have appealed the dismissal. SIBOR/SOR Case in the SDNY In 2016, a putative class action was filed in the SDNY against Barclays PLC, Barclays Bank PL C, BCI and other defendants, alleging manipulation of the Singapore Interbank Offered Rate (SIBOR) and Singapore Swap Offer Rate (SOR). The plaintiffs amended their complaint in 2017 following dismissal by the court of the claims against Barclays for failu re to state a claim. In October 2018, the court dismissed all claims against Barclays PLC, Barclays Bank PLC and BCI, a decision that the plaintiffs are challenging. Non-US Benchmarks Cases In the UK, certain local authorities have brought claims against Barclays asserting that they entered into loans in reliance on misrepresentations made by Barclays in respect of its conduct in relation to LIBOR. In addition to the US and UK actions described above, legal proceedings have been brought or threatened agai nst Barclays in connection with alleged manipulation of LIBOR and EURIBOR and other benchmarks in the UK, a number of other jurisdictions in Europe, Israel and Argentina. Additional proceedings in other jurisdictions may be brought in the future. Claimed amounts/Financial impact Aside from the settlements described above, it is not currently practicable to provide an estimate of any further financial impact of the actions described on Barclays or what effect they might have upon Barclays’ operating results, cash flows or financial position in any particular period. F oreign E xchange I nvestigations Various regulatory and enforcement authorities across multiple jurisdictions have been investigating a range of issues associated with Foreign Exchange sal es and trading, including electronic trading. In 2015 Barclays reached settlements with the CFTC, the DoJ, the NYDFS, the Board of Governors of the Federal Reserve System (Federal Reserve) and the FCA (together, the 2015 Resolving Authorities) in relatio n to investigations into certain sales and trading practices in the Foreign Exchange market. In connection with these settlements, Barclays paid total penalties of approximately $2.38bn and agreed to undertake certain remedial actions. Under the plea agree ment with the DoJ, which was approved by the US District Court for the District of Connecticut in January 2017, Barclays PLC agreed to a term of probation of three years. Barclays also continues to provide relevant information to certain of the 2015 Resolv ing Authorities. The European Commission is one of a number of authorities still conducting an investigation into certain trading practices in Foreign Exchange markets. In May 2019, the European Commission announced two settlements and Barclays has paid t otal penalties of approximately €210m. In June 2019, the Swiss Competition Commission announced two settlements, which require Barclays to pay total penalties of approximately CHF 27m. Claimed amounts/Financial impact Aside from the settlements described above, Barclays does not expect the financial impact of the matters described above to be material to the Group’s operating results, cash flows or financial position. Civil a ctions in r espect of Foreign Exchange Following settlement of certain investigat ions referred to above in ‘Foreign Exchange Investigations’ a number of individuals and corporates in a range of jurisdictions have threatened or brought civil actions against Barclays and other banks in relation to Foreign Exchange or may do so in the fut ure. Certain of these cases have been dismissed, settled or settled subject to final approval from the relevant court (and in the case of class actions, the right of class members to opt out of the settlement and to seek to file their own claims). FX Opt Out Action In 2014, a number of civil actions filed in the SDNY alleging manipulation of Foreign Exchange markets were combined into a single consolidated action (Consolidated FX Action). In 2015, Barclays Bank PLC and BCI settled the Consolidated FX Actio n and paid $384m. The settlement received final court approval in August 2018. In November 2018, a group of sixteen plaintiffs (and several of their affiliates) who opted out of the Consolidated FX Action settlement filed a complaint in the SDNY against th e Consolidated FX Action defendants, including Barclays Bank PLC and BCI. Retail Basis Action A putative action was filed in the Northern District of California (and subsequently transferred to the SDNY) against several international banks, including Bar clays PLC and BCI, on behalf of a putative class of individuals that exchanged currencies on a retail basis at bank branches (Retail Basis Claims). The Court has ruled that the Retail Basis Claims are not covered by the settlement agreement in the Consolid ated FX Action. The Court subsequently dismissed all Retail Basis Claims against Barclays and all other defendants. The plaintiffs amended their complaint and sought to expand the action to include credit card, debit card and wire transactions, which expan sion the Court denied. State Law FX Action In 2016, a putative class action was filed in the SDNY under federal, New York and California law on behalf of proposed classes of stockholders of Exchange Traded Funds and others who supposedly were indirect inv estors in FX Instruments. The plaintiffs’ counsel subsequently amended the complaint to bring claims on behalf of a proposed class of investors under federal and various state laws who traded FX Instruments through FX dealers or brokers not alleged to have manipulated Foreign Exchange Rates. A different group of plaintiffs subsequently filed another action and asserted substantively similar claims. These two actions were consolidated and a consolidated complaint was filed in 2017. The consolidated action wa s dismissed, but the plaintiffs have filed an amended complaint, except as to their federal claims. Non-US FX Actions In addition to the actions described above, legal proceedings have been brought or are threatened against Barclays in connection with ma nipulation of Foreign Exchange in the UK, a number of other jurisdictions in Europe, Israel and Australia and additional proceedings may be brought in the future. Claimed amounts/Financial impact Aside from the settlement described above, it is not curren tly practicable to provide an estimate of any further financial impact of the actions described on Barclays or what effect they might have upon Barclays’ operating results, cash flows or financial position in any particular period. Metals investigations B arclays Bank PLC has provided information to the DoJ, the CFTC and other authorities in connection with investigations into metals and metals-based financial instruments. Claimed amounts/Financial impact It is not currently practicable to provide an estimate of the financial impact of the actions described on Barclays or what effect they might have upon Barclays’ operating results, cash flows or financial position in any particular period. Civil actions in respect of the gold and silver fix A number of civil complaints, each on behalf of a proposed class of plaintiffs, have been consolidated and transferred 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 CEA, the Antitrust Act, and state antitrust and consumer protection laws. Also, in the US, a proposed class of plaintiffs filed a complaint against a number of banks, including Barclays Bank PLC, BCI and Barclays Capital Services Ltd., alleging manipulation of the price of silver in violation of the CEA and antitrust laws. The court has dismissed this action as against the Barclays entities. 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 in violation of Canadian law. Claimed amounts/Financial impact I t is not currently practicable to provide an estimate of the financial impact of the actions described on Barclays or what effect they might have upon Barclays’ operating results, cash flows or financial position in any particular period. US residential m ortgage related litigation There are various pending civil actions relating to US Residential Mortgage-Backed Securities (RMBS). Barclays was the sole provider of various loan-level representations and warranties (R&Ws) with respect to approximately $5bn o f Barclays sponsored securitisations. In addition, an entity that Barclays acquired in 2007 (Acquired Subsidiary) provided R&Ws on $19.4bn of loans it sold to third parties. There are no stated expiration provisions applicable to most R&Ws made by Barcla ys or the Acquired Subsidiary. Under certain circumstances, Barclays and/or the Acquired Subsidiary may be required to repurchase the related loans or make other payments related to such loans if the R&Ws are breached. The unresolved repurchase requests received on or before 30 June 2019 associated with R&Ws made by Barclays or the Acquired Subsidiary had an original unpaid principal balance of approximately $2.1bn at the time of such sale. The unresolved repurchase requests described above relate to civ il actions that have been commenced by the trustees for certain RMBS securitisations in which the trustees allege that Barclays and/or the Acquired Subsidiary must repurchase loans that violated the operative R&Ws. Such trustees making repurchase requests have also alleged that the operative R&Ws may have been violated with respect to a greater (but unspecified) amount of loans than the amount of loans previously stated in specific repurchase requests made by such trustees. These civil actions are ongoing. An intermediate appellate court has found that claims related to certain R&Ws are time-barred. This decision is being appealed. Claimed amounts/Financial impact It is not currently practicable to provide an estimate of any further financial impact of th e actions described on Barclays or what effect they might have upon Barclays’ operating results, cash flows or financial position in any particular period. Alternative trading systems In 2014, the New York State Attorney General (NYAG) filed a complaint ( NYAG Complaint) against Barclays PLC and BCI in the Supreme Court of the State of New York alleging, amongst other things, that Barclays PLC and BCI engaged in fraud and deceptive practices in connection with LX, Barclays’ SEC-registered alternative tradin g system (ATS). In February 2016, Barclays reached settlement agreements with the SEC and NYAG, which required Barclays to pay $35m to each. Following the filing of the NYAG Complaint, Barclays PLC and BCI were also named in a putative shareholder securiti es class action. The parties have agreed to a settlement of this action for $27m, which has received final court approval. Claimed amounts/Financial impact Aside from the settlements described above, there is no financial impact on Barclays’ operating res ults, cash flows or financial position. Treasury auction securities civil actions and related matters Various civil actions have been filed against Barclays Bank PLC, BCI and other financial institutions alleging violations of antitrust and other laws rel ating to the markets for US Treasury securities and Supranational, Sovereign and Agency securities. Certain governmental authorities are also conducting investigations relating to trading of certain government and agency securities in various markets. Numerous putative class action complaints have been filed in US Federal Court against Barclays Bank PLC, BCI and other financial institutions that have served as primary dealers in US Treasury securities. Those actions have been consolidated and in 2017, p laintiffs in the putative class action filed a consolidated amended complaint in the US Federal Court in New York against the defendants as well as certain corporations that operate electronic trading platforms on which US Treasury securities are traded. T he complaint purports to assert claims under US federal antitrust laws and state common law based on allegations that the defendants (i) conspired to manipulate the US Treasury securities market and/or (ii) conspired to prevent the creation of certain plat forms 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 action against BCI and certain other financial institutions that have served as primary dealers in US Treasury securities. This complaint alleges that defendants conspired to fix and manipulate the US Treasury securities market in violation of US federal antitrust laws, the CEA and state common law. Barclays PLC, Barclays Bank PL C, BCI, Barclays Execution Services Limited (formerly Barclays Services Limited), Barclays Capital Securities Limited and certain other financial institutions have been named as defendants in a civil antitrust complaint that alleges that the defendants eng aged in a conspiracy to fix prices and restrain competition in the market for US dollar-denominated Supranational, Sovereign and Agency bonds (SSA Bonds) from 2009 through 2015. The defendants have moved to dismiss the action. In February 2019, indirect pu rchasers of SSA Bonds filed a separate but related complaint making similar allegations. Certain governmental authorities are conducting investigations into activities relating to the trading of certain government and agency securities in various markets and Barclays has been providing information to various authorities on an ongoing basis. Claimed amounts/Financial impact It is not currently practicable to provide an estimate of the financial impact of the actions described on Barclays or what effect th ey might have upon Barclays’ operating results, cash flows or financial position in any particular period. US Government Sponsored Entities Bond Civil Class Action In a putative consolidated class action filed in the SDNY in 2019, plaintiffs allege that BCI and certain other bond dealers conspired to fix the prices of government sponsored entity bonds in violation of US antitrust law from January 2009 through January 2016. Claimed amounts/Financial impact It is not currently practicable to provide an est imate of the financial impact of the matter described on Barclays or what effect it might have upon Barclays’ operating results, cash flows or financial position in any particular period. Mexican Government Bond civil action In 2018, a putative consolidat ed class action against various financial institutions including Barclays PLC, Barclays Bank PLC, BCI, Barclays Capital Securities Limited, Barclays Bank Mexico, S.A., Grupo Financiero Barclays Mexico, S.A. de C.V. and Banco Barclays S.A. was consolidated in the US District Court in the SDNY. The plaintiffs assert antitrust and state law claims arising out of an alleged conspiracy to fix the prices of Mexican Government Bonds from 2006 through mid-2017. Defendants have moved to dismiss the consolidated acti on. Claimed amounts/Financial impact It is not currently practicable to provide an estimate of the financial impact of the actions described on Barclays or what effect they might have upon Barclays’ operating results, cash flows or financial position in any particular period. BDC Finance L.L.C. In 2008, BDC Finance L.L.C. (BDC) filed a complaint in the NY Supreme Court alleging that Barclays Bank PLC had breached a contract in connection with a portfolio of total return swaps governed by an ISDA Master A greement (collectively, the Agreement) when it failed to transfer approximately $40m of alleged excess collateral in response to BDC’s 2008 demand (Demand). BDC asserts that under the Agreement Barclays Bank PLC was not entitled to dispute the Demand before transferring the alleged excess collateral and that even if the Agreement entitled Barclays Bank PLC to dispute the Demand before making the transfer, Barclays Bank PLC failed to dispute the Demand. BDC demands damages totalling $298m plus attorneys ’ fees, expenses, and pre-judgement interest. Following a trial on certain liability issues, the court ruled in December 2018 that Barclays Bank PLC was not a defaulting party. BDC has appealed that decision. In 2011, BDC’s investment advisor, BDCM Fund A dviser, 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, asserting c laims for violation of the Connecticut Unfair Trade Practices Act and tortious interference with business and prospective business relations. The Connecticut case is currently stayed. Claimed amounts/Financial impact It is not currently practicable to pro vide an estimate of the financial impact of the actions described on Barclays or what effect they might have upon Barclays’ operating results, cash flows or financial position in any particular period. BDC has made claims against Barclays totalling $298m p lus attorneys’ fees, expenses, and pre-judgement interest . This amount does not necessarily reflect Barclays’ potential financial exposure if a ruling were to be made against it. Civil a ctions in r espect of the US Anti-Terrorism Act Civil complaints against Barclays Bank PLC and other banks allege engagement in a conspiracy and violation of the US Anti-Terrorism Act (ATA). These include various civil complaints filed in the US Federal Courts in the EDNY and SDNY by separate groups of plaintiffs (aggregating over 4,000) alleging that Barclays Bank PLC and a number of other banks engaged in a conspiracy and violated the ATA by facilitating US dollar denominated transactions for the Government of Iran and various Iranian banks, which in t urn funded acts of terrorism that injured or killed the plaintiffs’ family members. The plaintiffs seek to recover for pain, suffering and mental anguish pursuant to the provisions of the ATA, which allows for the tripling of any proven damages and attorne ys' fees. In respect of a motion by defendants to dismiss one of the complaints, in July 2018, a magistrate judge (to whom the court referred the motion) issued a recommendation that the motion be denied; the defendants objected to that recommendation; and the motion is pending before the court. In respect of another complaint, the defendants’ motion to dismiss was granted in March 2019, but the plaintiffs have moved to file an amended complaint. Claimed amounts/Financial impact It is not currently practic able to provide an estimate of the financial impact of the actions described on Barclays or what effect they might have upon Barclays’ operating results, cash flows or financial position in any particular period. Interest rate swap and credit default swap US civil actions Barclays PLC, Barclays Bank PLC, and BCI, together with other financial institutions that act as market makers for interest rate swaps (IRS) are named as defendants in several antitrust class actions which were consolidated in the SDNY in 2016. The complaints allege the defendants conspired to prevent the development of exchanges for IRS and demand unspecified money damages, treble damages and legal fees. Plaintiffs include certain swap execution facilities, as well as buy-side investors. The buy-side investors claim to represent a class that transacted in fixed-for-floating IRS with defendants in the US from 2008 to the present, including, for example, US retirement and pension funds, municipalities, university endowments, corporations, in surance companies and investment funds. In 2017, a separate suit was filed in the US District Court in the SDNY against the same financial institution defendants in the IRS cases, including Barclays PLC, Barclays Bank PLC, and BCI, claiming that certain conduct alleged in the IRS cases also caused plaintiff to suffer harm with respect to the Credit Default Swaps market. The defendants have moved to dismiss this action. Separately, in June 2018, trueEX LLC filed an antitrust class action in the SDNY again st eleven financial institutions that act as dealers in the IRS market, including Barclays Bank PLC and BCI, alleging that the defendants unlawfully conspired to block trueEX from successfully entering the market with its IRS trading platform. trueEX LLC a lso alleges that the defendants more generally boycotted other anonymous, all-to-all IRS trading platforms. In November 2018, the court dismissed certain claims for unjust enrichment and tortious interference, but denied a motion to dismiss the federal and state antitrust claims which remain pending. Claimed amounts/Financial impact It is not currently practicable to provide an estimate of the financial impact of the actions described on Barclays or what effect they might have upon Barclays’ operating res ults, cash flows or financial position in any particular period. Portuguese Competition Authority investigation The Portuguese Competition Authority is investigating whether competition law was infringed by the exchange of information about retail credit products amongst 15 banks in Portugal, including Barclays, over a period of 11 years with particular reference to mortgages, consumer lending and lending to small and medium enterprises. Barclays is cooperating with the investigation. Claimed amounts/Financial impact It is not currently practicable to provide an estimate of the financial impact of the

Related party transactions

Related party transactions	6 Months Ended
	Jun. 30, 2019
Related party transactions [abstract]
Related party transactions	16 . Related party transactions Parent company The parent company, which is also the ultimate parent company, is Barclays PLC , which holds 100 % of the issued ordinary shares of Barclays Bank PLC. Fellow subsidiaries Transactions between the Barclays Bank Group and other subsidiaries of the parent company meet the definition of related party transactions. Amounts included in the Barclays Bank Group’s financial statements with other Barclays Group companies are as follows: Half year ended 30.06.19 Half year ended 30.06.18 Parent Fellow subsidiaries Parent Fellow subsidiaries £m £m £m £m Total income (275) 32 (77) 1 Operating expenses (46) (1,546) (72) (2,045) As at 30.06.19 As at 31.12.18 Parent Fellow subsidiaries Parent Fellow subsidiaries £m £m £m £m Total assets 1,707 2,332 727 1,091 Total liabilities 26,315 1,272 21,405 2,058 Except for the above, no related party transactions that have taken place in the half year ended 30 June 2019 have materially affected the financial position or performance of the Barclays Bank Group during this period.

Barclays Bank PLC parent conden

Barclays Bank PLC parent condensed balance sheet	6 Months Ended
	Jun. 30, 2019
Barclays Bank PLC parent condensed balance sheet
Barclays Bank PLC parent condensed balance sheet	16 . Barclays Bank PLC parent condensed balance s heet As at As at 30.06.19 31.12.18 Assets £m £m Cash and balances at central banks 104,789 126,002 Cash collateral and settlement balances 87,509 66,196 Loans and advances at amortised cost 159,466 156,764 Reverse repurchase agreements and other similar secured lending 12,108 5,766 Trading portfolio assets 89,066 73,480 Financial assets at fair value through the income statement 180,560 179,365 Derivative financial instruments 243,388 221,247 Financial assets at fair value through other comprehensive income 54,659 43,706 Investment in associates and joint ventures 138 140 Investment in subsidiaries 16,310 14,958 Goodwill and intangible assets 117 123 Property, plant and equipment 1 445 103 Current tax assets 1,782 1,439 Deferred tax assets 1,080 1,249 Retirement benefit schemes 1,850 1,748 Other assets 4,087 1,110 Total assets 957,354 893,396 Liabilities Deposits at amortised cost 240,920 231,017 Cash collateral and settlement balances 77,817 56,358 Repurchase agreements and other similar secured borrowing 10,031 11,113 Debt securities in issue 28,384 26,391 Subordinated liabilities 36,137 35,085 Trading portfolio liabilities 50,940 46,626 Financial liabilities designated at fair value 220,597 216,966 Derivative financial instruments 238,992 221,590 Current tax liabilities 379 376 Deferred tax liabilities 332 - Retirement benefit liabilities 115 124 Other liabilities 1 4,723 3,295 Provisions 610 818 Total liabilities 909,977 849,759 Equity Called up share capital and share premium 2,348 2,348 Other equity instruments 12,168 10,361 Other reserves 1,478 383 Retained earnings 31,383 30,545 Total equity 47,377 43,637 Total liabilities and equity 957,354 893,396 Barclays adopted the accounting standard IFRS 16 on 1 January 2019. The impact on adoption was an increase in property, plant and equipment of £ 0.3 bn, an increase in liabilities of £ 0.3 bn, with no material impact on retained earnings . Following a decision to move all European Branch operations to Barclays Bank Ireland PLC, Barclays Bank PLC transferred its businesses in France, Italy, Netherlands, Portugal, Spain and Sweden in Q1 2019. There was no impact on the consolidated financial statements of the Barclays Bank PLC Group. The most material impacts on the balance sheet of Barclays Bank PLC affect loans and advances at amortised cost of £ 7,043 m, deposits at amortised cost of £ 3,455 m, and repurchase agreements and other similar secur ed lending of £ 2,827 m. The total net assets transferred to Barclays Bank Ireland PLC were £ 181 m in exchange for 99.4 m ordinary shares issued by Barclays Bank Ireland PLC. As a result, Barclays Bank PLC increased its investment in Barclays Bank Ireland PLC by £ 181 m. In addition to this, in March 2019, Barclays Bank PLC transferred to Barclays Bank Ireland PLC financial liabilities designated at fair value of £ 3,780 m, in exchange for cash consideration.

Other disclosures - Credit Risk

Other disclosures - Credit Risk	6 Months Ended
	Jun. 30, 2019
Other disclosures - Credit Risk
Other disclosures - Credit Risk	Loans and advances at amortised cost by product The table below presents a breakdown of loans and advances at amortised cost and the impairment allowance with s tage allocation by asse t classification . Stage 2 As at 30.06.19 Stage 1 Not past due <=30 days past due >30 days past due Total Stage 3 Total 1 Gross exposure £m £m £m £m £m £m £m Home loans 11,262 614 60 92 766 1,183 13,211 Credit cards, unsecured loans and other retail lending 31,753 4,227 305 290 4,822 2,057 38,632 Corporate loans 86,126 7,695 595 1,000 9,290 1,136 96,552 Total 129,141 12,536 960 1,382 14,878 4,376 148,395 Impairment allowance Home loans 28 26 11 10 47 318 393 Credit cards, unsecured loans and other retail lending 349 563 105 143 811 1,423 2,583 Corporate loans 122 225 18 6 249 384 755 Total 499 814 134 159 1,107 2,125 3,731 Net exposure Home loans 11,234 588 49 82 719 865 12,818 Credit cards, unsecured loans and other retail lending 31,404 3,664 200 147 4,011 634 36,049 Corporate loans 86,004 7,470 577 994 9,041 752 95,797 Total 128,642 11,722 826 1,223 13,771 2,251 144,664 Coverage ratio % % % % % % % Home loans 0.2 4.2 18.3 10.9 6.1 26.9 3.0 Credit cards, unsecured loans and other retail lending 1.1 13.3 34.4 49.3 16.8 69.2 6.7 Corporate loans 0.1 2.9 3.0 0.6 2.7 33.8 0.8 Total 0.4 6.5 14.0 11.5 7.4 48.6 2.5 As at 31.12.18 Gross exposure £m £m £m £m £m £m £m Home loans 11,486 663 50 147 860 1,194 13,540 Credit cards, unsecured loans and other retail lending 29,548 4,381 305 240 4,926 2,078 36,552 Corporate loans 81,555 7,480 315 443 8,238 917 90,710 Total 122,589 12,524 670 830 14,024 4,189 140,802 Impairment allowance Home loans 26 29 9 9 47 307 380 Credit cards, unsecured loans and other retail lending 356 694 118 160 972 1,433 2,761 Corporate loans 107 214 11 11 236 359 702 Total 489 937 138 180 1,255 2,099 3,843 Net exposure Home loans 11,460 634 41 138 813 887 13,160 Credit cards, unsecured loans and other retail lending 29,192 3,687 187 80 3,954 645 33,791 Corporate loans 81,448 7,266 304 432 8,002 558 90,008 Total 122,100 11,587 532 650 12,769 2,090 136,959 Coverage ratio % % % % % % % Home loans 0.2 4.4 18.0 6.1 5.5 25.7 2.8 Credit cards, unsecured loans and other retail lending 1.2 15.8 38.7 66.7 19.7 69.0 7.6 Corporate loans 0.1 2.9 3.5 2.5 2.9 39.1 0.8 Total 0.4 7.5 20.6 21.7 8.9 50.1 2.7 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, accrued income and sundry debtors. These have a total gross exposure of £ 159.9 bn (December 2018: £ 120.1 bn) and impairment allowance of £ 21 m ( December 2018: £ 11 m). This comprises £ 13 m ( December 2018: £ 9 m) E xpected Credit Loss (ECL) on £ 159.4 bn ( December 2018: £ 119.6 bn) Stage 1 assets, £ 3 m ( December 2018: £ 2 m) on £ 0.5 bn ( December 2018: £ 0.5 bn) Stage 2 fair value through other comprehensive income assets and £ 5 m ( December 2018: £nil ) on £ 5 m ( December 2018: £nil ) Stage 3 other assets. 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. Explanation of the terms: 12-month ECL, lifetime ECL and credit-impaired are included in the Barclays Bank PLC Annual Report 2018 on page 173. Barclays Bank Group does not hold any material purchased or originated credit-impaired assets as at period end. Stage 1 Stage 2 Stage 3 Total Gross exposure for loans and advances at amortised cost £m £m £m £m As at 1 January 2019 122,589 14,024 4,189 140,802 Transfers from Stage 1 (4,661) 4,348 313 - Transfers from Stage 2 3,540 (4,255) 715 - Transfers from Stage 3 36 98 (134) - Business activity in the year 32,336 984 25 33,345 Net drawdowns and repayments (2,880) 1,482 331 (1,067) Final repayments (21,819) (1,803) (415) (24,037) Disposals - - (21) (21) Write-offs 1 - - (627) (627) As at 30 June 2019 129,141 14,878 4,376 148,395 Stage 1 Stage 2 Stage 3 Total Impairment allowance on loans and advances at amortised cost £m £m £m £m As at 1 January 2019 489 1,255 2,099 3,843 Transfers from Stage 1 (58) 51 7 - Transfers from Stage 2 246 (456) 210 - Transfers from Stage 3 1 7 (8) - Business activity in the year 95 39 5 139 Net re-measurement and movement due to exposure and risk parameter changes (243) 251 513 521 Final repayments (31) (40) (53) (124) Disposals - - (21) (21) Write-offs 1 - - (627) (627) As at 30 June 2019 2 499 1,107 2,125 3,731 Reconciliation of ECL movement to impairment charge/(release) for the period £m ECL movement excluding assets derecognised due to disposals and write-offs 536 Post write-off recoveries 1 (47) Exchange and other adjustments (7) Impairment charge on loan commitments and financial guarantees 22 Impairment charge on other financial assets 2 6 Income statement charge/(release) for the period 510 1 In H119 , gross write-offs amounted to £ 6 27 m ( H1 18: £ 788 m) and post write-off recoveries amounted to £ 47 m ( H1 18: £ 43 m). Net write-offs represent gross write-offs less post write-off recoveries and amounted to £ 5 80 m ( H1 18: £ 745 m) . 2 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, accrued income and sundry debtors. These have a total gross exposure of £ 159.9 bn ( December 2018: £ 120.1 bn) and impairment allowance of £ 21 m ( December 2018: £ 11 m). This comprises £ 13 m ECL ( December 2018: £ 9 m) on £ 159.4 bn stage 1 assets ( December 2018: £ 119.6 bn) and £ 3 m ( December 2018: £ 2 m) on £ 0.5 bn stage 2 fa ir value through other comprehensive income assets ( December 2018: £ 0.5 bn) and £ 5 m ( December 2018: £ nil ) on £ 5 m Stage 3 other assets ( December 20 18: £ nil ) . Stage 1 Stage 2 Stage 3 Total Gross exposure for loan commitments and financial guarantees £m £m £m £m As at 1 January 2019 248,590 16,444 421 265,455 Net transfers between stages (506) 142 364 - Business activity in the year 44,043 1,538 9 45,590 Net drawdowns and repayments (2,348) 997 (282) (1,633) Final repayments (27,183) (4,092) (234) (31,509) As at 30 June 2019 262,596 15,029 278 277,903 Stage 1 Stage 2 Stage 3 Total Impairment allowance on loan commitments and financial guarantees £m £m £m £m As at 1 January 2019 91 104 22 217 Net transfers between stages 8 (6) (2) - Business activity in the year 26 25 7 58 Net re-measurement and movement due to exposure and risk parameter changes (17) 14 6 3 Final repayments (15) (26) (1) (42) As at 30 June 2019 93 111 32 236

Significant accounting policy (

Significant accounting policy (Policies)	6 Months Ended
	Jun. 30, 2019
Basis of preparation
IFRS 16 - Leases	IFRS 16, Leases, which replaced IAS 17, Leases, was applied effective from 1 January 2019. IFRS 16 applies to all leases with the exception of licenses of intellectual property, rights held by licensing agreement within the s cope of IAS 38, Intangible Assets, service concession arrangements, leases of biological assets 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 Barclays Bank Group has decided to apply. IFRS 16 does not result in a significant change to lessor accounting; however, for lessee accou nting there is no longer a distinction between operating and finance leases. Lessees will be required to recognise both: A lease liability, measured at the present value of remaining cash 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 underlying 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 payments are made. The right of use asset will amortise to the income statement over the life of the lease. There is a recognition exemption in IFRS 16 for leases with a term not exceeding 12 months, which allows the lessee to apply similar accounting as an operating lease under IAS 17. The Barclays Bank Group appli ed IFRS 16 on a modified retrospective basis and took advantage of the option not to restate comparative periods. The Barclays Bank Group applied the following transition options available under the modified retrospective approach: To calculate the right of use ass et equal to the lease liability, adjusted for prepaid or accrued payments. To rely on the previous assessment of whether leases are onerous in accordance with IAS 37 immediately before the date of initial application as an alternative to performing an impa irment review. The Barclays Bank Group adjusted the carrying amount of the ROU asset at the date of initial application by the previous carrying amount of its onerous lease provision. To a pply the recognition exception for leases with a term not exceeding 12 months. To u se hindsight in determining the lease term if the contract contains options to extend or terminate the lease. The impact on adoption was an increase in property, plant and equipment of £ 0.5 bn, and an increase in other liabilities of £ 0.5 b n, with no material impact on retained earnings.
IFRIC Interpretation 23 - Uncertainty over Income Tax Treatment and IAS 12 - Income Taxes - Amendments to IAS 12	IFRIC 23 clarifies the application of IAS 12 to accounting for income tax treatments that have yet to be accepted by tax authorities, in scenarios where it may be unclear how tax law applies to a particular transaction or circumstance, or whether a taxation authority will accept an entity’s tax treatment. IFRIC 23 has been applied from 1 January 2019. There was no significant effect from the adoption of IF RIC 23 in relation to accounting for uncertain tax positions. The IASB amended IAS 12 in order to clarify the accounting treatment of the income tax consequences of dividends. As a result of the amendment, the tax consequences of all payments on financial instruments that are classified as equity for accounting purposes, where those payments are considered to be a distribution of profit, will be included in, and will reduce, the income statement tax charge. The amendments of IAS 12 were applied to the income tax consequences of dividends recognised on or after the beginning of the earliest comparative period . This resulted in reducing the tax charge and increasing profit after tax f or H119 by £ 77 m and H118 by £ 8 4 m. This change does not impact retained earnings.
IAS 19 - Employee Benefits - Amendments to IAS 19	The IASB issued amendments to the guidance in IAS 19 , Employee Benefits, in connection with accounting for plan amendments, curtailments and settlements. The amendments have been applied to plan amendments, curtailments or settle ments occurring on or after 1 January 2019. There was no significant effect from the adoption of the amendments of IAS 19.

Segmental reporting (Tables)

Segmental reporting (Tables)	6 Months Ended
	Jun. 30, 2019
Segmental Reporting
Analysis of results by business	Analysis of results by business Corporate and Investment Bank Consumer, Cards and Payments Head Office Barclays Bank Group Half year ended 30.06.19 £m £m £m £m Total income 5,149 2,193 (220) 7,122 Credit impairment charges and other provisions (96) (396) (18) (510) Net operating income/(expenses) 5,053 1,797 (238) 6,612 Total operating expenses (3,615) (1,211) (84) (4,910) Other net income/(expenses) 1 15 16 (8) 23 Profit/(loss) before tax from continuing operations 1,453 602 (330) 1,725 As at 30.06.19 £bn £bn £bn £bn Total assets 882.1 73.1 14.1 969.3 Corporate and Investment Bank Consumer, Cards and Payments Head Office Barclays Bank Group Half year ended 30.06.18 £m £m £m £m Total income 5,373 2,137 (257) 7,253 Credit impairment releases/(charges) and other provisions 182 (343) 5 (156) Net operating income/(expenses) 5,555 1,794 (252) 7,097 Total operating expenses (3,628) (1,134) (1,622) (6,384) Other net income/(expenses) 1 8 17 (13) 12 Profit/(loss) before tax from continuing operations 1,935 677 (1,887) 725 As at 31.12.18 £bn £bn £bn £bn Total assets 792.5 71.6 13.6 877.7 Other net income/(expenses) represents the share of post-tax results of associates and joint ventures, profit (or loss) on disposal of subsidiaries, associates and joint ventures and gains on acquisitions .
Split of income by geographic region	Split of income by geographic region 1 Half year ended Half year ended 30.06.19 30.06.18 £m £m UK 2,000 2,118 Europe 863 1,026 Americas 3,825 3,735 Africa and Middle East 75 62 Asia 359 312 Total 7,122 7,253 The geographic region is based on counterparty location .

Fee and commission income (Tabl

Fee and commission income (Tables)	6 Months Ended
	Jun. 30, 2019
Fee and commission income (expense) [abstract]
Total fees in scope of IFRS 15 Revenues from Contracts with Customers	Fee and commission income is disaggregated below and includes a total for fees in scope of IFRS 15, Revenue from Contracts with Customers: Corporate and Investment Bank Consumer, Cards and Payments Head Office Total Half year ended 30.06.19 £m £m £m £m Fee type Transactional 185 1,168 - 1,353 Advisory 364 41 - 405 Brokerage and execution 512 24 - 536 Underwriting and syndication 1,240 - - 1,240 Other 62 124 16 202 Total revenue from contracts with customers 2,363 1,357 16 3,736 Other non-contract fee income 54 - - 54 Fee and commission income 2,417 1,357 16 3,790 Fee and commission expense (350) (611) - (961) Net fee and commission income 2,067 746 16 2,829 Corporate and Investment Bank Consumer, Cards and Payments Head Office Total Half year ended 30.06.18 £m £m £m £m Fee type Transactional 185 1,072 - 1,257 Advisory 340 37 - 377 Brokerage and execution 553 30 - 583 Underwriting and syndication 1,368 - - 1,368 Other 3 78 16 97 Total revenue from contracts with customers 2,449 1,217 16 3,682 Other non-contract fee income 55 - - 55 Fee and commission income 2,504 1,217 16 3,737 Fee and commission expense (337) (538) - (875) Net fee and commission income 2,167 679 16 2,862

Tax (Tables)

Tax (Tables)	6 Months Ended
	Jun. 30, 2019
Tax
Current and deferred tax assets and liabilities	Assets Liabilities As at As at As at As at 30.06.19 31.12.18 30.06.19 31.12.18 Current and deferred tax assets and liabilities £m £m £m £m Current tax 2,041 1,713 (613) (621) Deferred tax 2,677 2,970 (332) - Total 4,718 4,683 (945) (621)
Deferred tax assets and liabilities	As at As at 30.06.19 31.12.18 Deferred tax assets and liabilitites £m £m USA 2,293 2,541 UK - 3 Other 384 426 Deferred tax assets 2,677 2,970 Deferred tax liabilities - UK (332) - Analysis of deferred tax assets Temporary differences 2,289 2,441 Tax losses 388 529 Deferred tax assets 2,677 2,970

Non-controlling interests (Tabl

Non-controlling interests (Tables)	6 Months Ended
	Jun. 30, 2019
Non-controlling interests [abstract]
Non-controlling interests	Profit attributable to non-controlling interests Equity attributable to non-controlling interests Half year ended Half year ended As at As at 30.06.19 30.06.18 30.06.19 31.12.18 £m £m £m £m Other non-controlling interests - (1) 2 2

Dividends on ordinary shares (T

Dividends on ordinary shares (Tables)	6 Months Ended
	Jun. 30, 2019
Dividends on ordinary shares [abstract]
Dividends on ordinary shares	Half year ended 30.06.19 Half year ended 30.06.18 Dividends paid during the period £m £m Ordinary shares 1 - 14,168 Preference shares 27 106 Total 27 14,274 H118 included the dividend in specie of £ 14 bn paid to Barclays PLC for transferring the equity ownership in Barclays Bank UK PLC .

Fair value of financial instr_2

Fair value of financial instruments (Tables)	6 Months Ended
	Jun. 30, 2019
Fair value of financial instruments
Assets and liabilities held at fair value disaggregated by valuation technique (fair value hierarchy)	The following table shows Barclays Bank Group’s assets and liabilities that are held at fair value disaggregated by valuation technique (fair value hierarchy) and balance sheet classification: Valuation technique using Quoted market prices Observable inputs Significant unobservable inputs (Level 1) (Level 2) (Level 3) Total As at 30.06.19 £m £m £m £m Trading portfolio assets 58,369 58,108 3,548 120,025 Financial assets at fair value through the income statement 10,586 141,970 3,687 156,243 Derivative financial instruments 6,004 232,717 5,701 244,422 Financial assets at fair value through other comprehensive income 19,113 36,573 170 55,856 Investment property - - 8 8 Total assets 94,072 469,368 13,114 576,554 Trading portfolio liabilities (24,439) (16,890) (6) (41,335) Financial liabilities designated at fair value (98) (229,493) (284) (229,875) Derivative financial instruments (5,728) (232,477) (4,799) (243,004) Total liabilities (30,265) (478,860) (5,089) (514,214) As at 31.12.18 Trading portfolio assets 51,029 49,396 3,613 104,038 Financial assets at fair value through the income statement 8,918 131,682 4,650 145,250 Derivative financial instruments 6,813 210,655 5,215 222,683 Financial assets at fair value through other comprehensive income 15,751 28,888 355 44,994 Investment property - - 9 9 Total assets 82,511 420,621 13,842 516,974 Trading portfolio liabilities (19,401) (17,210) (3) (36,614) Financial liabilities designated at fair value (76) (217,404) (261) (217,741) Derivative financial liabilities (6,152) (208,697) (4,743) (219,592) Total liabilities (25,629) (443,311) (5,007) (473,947) The following table shows Barclays Bank Group’s assets and liabilities that are held at fair value disaggregated by valuation technique (fair value hierarchy) and product type: Assets Liabilities Valuation technique using Valuation technique using Quoted market prices (Level 1) Observable inputs (Level 2) Significant unobservable inputs (Level 3) Quoted market prices (Level 1) Observable inputs (Level 2) Significant unobservable inputs (Level 3) As at 30.06.19 £m £m £m £m £m £m Interest rate derivatives - 152,892 2,320 - (145,912) (2,071) Foreign exchange derivatives - 56,187 209 - (57,976) (289) Credit derivatives - 11,565 1,448 - (11,626) (369) Equity derivatives 6,004 10,871 1,711 (5,728) (15,801) (2,057) Commodity derivatives - 1,202 13 - (1,162) (13) Government and government sponsored debt 46,619 56,909 2 (11,321) (11,755) - Corporate debt - 18,827 616 - (5,671) (6) Certificates of deposit, commercial paper and other money market instruments - 554 - - (7,939) (21) Margin lending - 15,306 - - (23,860) - Reverse repurchase and repurchase agreements - 123,464 13 - (148,870) - Non-asset backed loans - 7,349 4,071 - - - Asset backed securities - 3,157 669 - (28) - Issued debt - - - - (47,402) (263) Equity cash products 41,347 10,190 357 (13,118) (804) - Private equity investments 4 - 185 - - - Other 1 98 895 1,500 (98) (54) - Total 94,072 469,368 13,114 (30,265) (478,860) (5,089) As at 31.12.18 Interest rate derivatives - 122,975 2,478 - (118,231) (2,456) Foreign exchange derivatives - 63,960 192 - (63,897) (185) Credit derivatives - 9,374 1,381 - (9,188) (331) Equity derivatives 6,813 12,933 1,136 (6,152) (16,001) (1,743) Commodity derivatives - 1,413 28 - (1,380) (28) Government and government sponsored debt 38,910 47,882 14 (8,143) (11,154) - Corporate debt - 14,529 456 - (5,085) - Certificates of deposit, commercial paper and other money market instruments - 1,135 - - (8,556) (10) Margin lending - 10,388 - - (26,875) - Reverse repurchase and repurchase agreements - 118,623 768 - (139,361) - Non-asset backed loans - 7,378 4,452 - - - Asset backed securities - 2,265 688 - (245) - Issued debt - - - - (42,104) (251) Equity cash products 36,705 7,195 698 (11,258) (1,181) (3) Private equity investments 7 - 190 - - - Other 1 76 571 1,361 (76) (53) - Total 82,511 420,621 13,842 (25,629) (443,311) (5,007) Other includes commercial real estate loans, fund and fund-linked products, asset backed loans, physical commodities and investment property .
Analysis of movements in Level 3 assets and liabilities	Level 3 movement analysis The following table summarises the movements in the balances of Level 3 assets and liabilities during the period. The table shows gains and losses and includes amounts for all financial assets and liabilities that are held at fair value transferred to and from Level 3 during the period. Transfers have been reflected as if they had taken place at the beginning of the year. Asset and liability moves between Level 2 and Level 3 are primarily due to i) an increase or decrease in o bservable market activity related to an input or ii) a change in the significance of the unobservable input, with assets and liabilities classified as Level 3 if an unobservable input is deemed significant. Level 3 movement analysis Purchases Sales Issues Settlements Total gains and losses in the period recognised in the income statement Transfers As at 30.06.19 As at 01.01.19 Trading income Other income In Out £m £m £m £m £m £m £m £m £m £m Government and government sponsored debt 14 2 - - - - - - (14) 2 Corporate debt 388 70 (24) - (31) 14 - 32 (74) 375 Non-asset backed loans 2,263 1,235 (1,260) - (19) 12 - 19 (90) 2,160 Asset backed securities 664 81 (127) - - 5 - 16 (29) 610 Equity cash products 136 48 (13) - - (2) - 116 (20) 265 Other 148 - - - (1) (10) - - (1) 136 Trading portfolio assets 3,613 1,436 (1,424) - (51) 19 - 183 (228) 3,548 Non-asset backed loans 1,836 2 - - (132) 70 - - (1) 1,775 Equity cash products 559 9 - - (10) 4 178 - - 740 Private equity investments 191 4 (3) - (1) - (6) - - 185 Other 2,064 2,334 (2,619) - (2) 17 9 24 (840) 987 Financial assets at fair value through the income statement 4,650 2,349 (2,622) - (145) 91 181 24 (841) 3,687 Non-asset backed loans 353 48 - - (55) - - - (218) 128 Asset backed securities - 40 - - - - - - - 40 Equity cash products 2 - - - - - - - - 2 Financial assets at fair value through other comprehensive income 355 88 - - (55) - - - (218) 170 Investment property 9 - - - - - (1) - - 8 Trading portfolio liabilities (3) - - - - 2 - (5) - (6) Certificates of deposit, commercial paper and other money market instruments (10) - - - 1 - (1) (11) - (21) Issued debt (251) - - (16) 1 5 - (3) 1 (263) Financial liabilities designated at fair value (261) - - (16) 2 5 (1) (14) 1 (284) Interest rate derivatives 22 (3) - - 76 116 - (107) 145 249 Foreign exchange derivatives 7 - - - (12) (41) - (51) 17 (80) Credit derivatives 1,050 (63) 4 - (3) 86 - 2 3 1,079 Equity derivatives (607) (122) (5) - 23 89 - (16) 292 (346) Commodity derivatives - - - - - - - - - - Net derivative financial instruments 1 472 (188) (1) - 84 250 - (172) 457 902 Total 8,835 3,685 (4,047) (16) (165) 367 179 16 (829) 8,025 Derivative financial instruments are represented on a net basis. On a gross basis, derivative financial assets were £ 5,701 m and derivative financial liabilities were £ 4,799 m. Level 3 movement analysis Purchases Sales Issues Settle- ments Total gains and losses in the period recognised in the income statement Transfers As at 30.06.18 As at 01.01.18 Trading income Other income In Out £m £m £m £m £m £m £m £m £m £m Government and government sponsored debt 49 11 - - - - - - (35) 25 Corporate debt 871 35 (17) - (23) 6 - 15 (6) 881 Non-asset backed loans 166 2,239 (239) - - 2 - 11 (6) 2,173 Asset backed securities 627 100 (99) - - (11) - 5 (30) 592 Equity cash products 68 - (7) - - 35 - 75 (52) 119 Other 196 4 (4) - (10) (21) - 24 (138) 51 Trading portfolio assets 1,977 2,389 (366) - (33) 11 - 130 (267) 3,841 Non-asset backed loans 6,073 16 (4,432) - (238) 4 - - (4) 1,419 Equity cash products 8 11 - - - - - - - 19 Private equity investments 688 295 (37) - - - 53 - (14) 985 Other 750 2,359 (1,967) - - 4 110 - - 1,256 Financial assets at fair value through the income statement 7,519 2,681 (6,436) - (238) 8 163 - (18) 3,679 Equity cash products 36 - (17) - - - - - (18) 1 Private equity investments 129 - (12) - - - - - (14) 103 Other 40 - (39) - - - - - - 1 Financial assets at fair value through other comprehensive income 205 - (68) - - - - - (32) 105 Investment property 116 - (104) - (5) - 4 - - 11 Trading portfolio liabilities (4) - 2 - - - - 2 - - - Certificates of deposit, commercial paper and other money market instruments (250) - 202 - - - - - - (48) Issued debt (214) - - (4) 4 19 - (219) 125 (289) Other (16) - 16 - 2 - (2) - - - Financial liabilities designated at fair value (480) - 218 (4) 6 19 (2) (219) 125 (337) Interest rate derivatives (150) - - - 96 (46) - (343) 58 (385) Foreign exchange derivatives 37 - - - (17) (30) - 8 (18) (20) Credit derivatives 1,146 2 3 - (15) (210) - 1 (2) 925 Equity derivatives (896) 22 (431) - 221 129 - 33 175 (747) Net derivative financial instruments 1 137 24 (428) - 285 (157) - (301) 213 (227) Total 9,470 5,094 (7,182) (4) 15 (119) 165 (388) 21 7,072 Derivative financial instruments are presented on a net basis. On a gross basis, derivative financial assets were £ 5,066 m and derivative financial liabilities were £ 5,293 m.
Unrealised gains and losses recognised during the period on Level 3 assets and liabilities held at period end	Unrealised g ains and losses on Level 3 financial assets and liabilities The following table discloses the unrealised gains a nd losses recognised in the period arising on Level 3 financial assets and liabilities held at the pe riod end. Half year ended 30.06.19 Half year ended 30.06.18 Income statement Total Income statement Total Trading income Other income Trading income Other income £m £m £m £m £m £m Trading portfolio assets 21 - 21 (3) - (3) Financial assets at fair value through the income statement 75 178 253 7 116 123 Investment properties - (1) (1) - - - Trading portfolio liabilities 2 - 2 - - - Financial liabilities designated at fair value 6 - 6 18 - 18 Net derivative financial instruments 212 - 212 (155) - (155) Total 316 177 493 (133) 116 (17)
Sensitivity analysis of valuations using unobservable inputs	Valuation techniques and sensitivity analysis Sensitivity analysis is performed on products with significant unobservable inputs (Level 3) to generate a range of reasonably possible alternative valuations. The sensitivity methodologies applied take account of the nature of valuation techniques used, as well as the availability and reliability of observable proxy and historical data and the impact of using alternative models. Sensitivity analysis of valuations using unobservable inputs As at 30.06.19 As at 31.12.18 Favourable changes Unfavourable changes Favourable changes Unfavourable changes £m £m £m £m Interest rate derivatives 52 (118) 80 (162) Foreign exchange derivatives 11 (14) 7 (10) Credit derivatives 125 (79) 126 (73) Equity derivatives 107 (108) 110 (112) Commodity derivatives 1 (1) 1 (1) Corporate debt 12 (10) 10 (2) Non-asset backed loans 138 (241) 141 (210) Equity cash products 130 (173) 121 (155) Private equity investments 6 (7) - (10) Other 1 2 (2) 2 (2) Total 584 (753) 598 (737) Other includes commercial real estate loans, fund and fund-linked products, asset backed loans, physical commodities and investment property .
Fair value adjustments	Fair value adjustments Key balance sheet valuation adjustments are quantified below: As at As at 30.06.19 31.12.18 £m £m Exit price adjustments derived from market bid-offer spreads (448) (451) Uncollateralised derivative funding (60) (47) Derivative credit valuation adjustments (149) (125) Derivative debit valuation adjustments 192 237
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 Valuation methodologies employed in calculating the fair value of financial assets and liabilities measured at amortised cost are consistent with the Barclays Bank PLC Annual Report 2018 disclosure. The following table summarises the fair value of financial assets and liabilities measured at amortised cost on the Barclays Bank Group’s balance sheet: As at 30.06.19 As at 31.12.18 Carrying amount Fair value Carrying amount Fair value Financial assets £m £m £m £m Loans and advances at amortised cost - Home loans 12,818 12,242 13,160 12,592 - Credit cards, unsecured loans and other retail lending 34,035 34,951 31,921 33,115 - Finance lease receivables 2,035 2,178 1,886 2,057 - Corporate loans 95,776 95,053 89,992 89,671 Reverse repurchase agreements and other similar secured lending 7,865 7,865 1,613 1,613 Financial liabilities Deposits at amortised cost - Banks (19,579) (19,579) (15,569) (15,569) - Current and demand accounts (78,961) (78,961) (77,264) (77,264) - Savings accounts (27,008) (27,008) (26,980) (26,980) - Other time deposits (89,577) (89,569) (79,524) (79,524) Repurchase agreements and other similar secured borrowing (5,992) (5,992) (7,378) (7,378) Debt securities in issue (42,251) (42,247) (39,063) (39,083) Subordinated liabilities (36,368) (36,905) (35,327) (36,174)

Subordinated Liabilities (Table

Subordinated Liabilities (Tables)	6 Months Ended
	Jun. 30, 2019
Subordinated liabilities [abstract]
Subordinated liabilities	8. Subordinated liabilities Half year ended Year ended 30.06.19 31.12.18 £m £m Opening balance as at 1 January 35,327 24,193 Issuances 4,508 221 Redemptions (4,321) (3,246) Other 854 14,159 Closing balance 36,368 35,327

Provisions (Tables)

Provisions (Tables)	6 Months Ended
	Jun. 30, 2019
Provisions [abstract]
Provisions	9. Provisions As at As at 30.06.19 31.12.18 £m £m Customer redress 104 127 Legal, competition and regulatory matters 224 411 Redundancy and restructuring 71 68 Undrawn contractually committed facilities and guarantees 236 217 Onerous contracts 18 90 Sundry provisions 201 214 Total 854 1,127

Other reserves (Tables)

Other reserves (Tables)	6 Months Ended
	Jun. 30, 2019
Other reserves [abstract]
Other reserves	13. Other reserves As at As at 30.06.19 31.12.18 £m £m Currency translation reserve 4,159 3,927 Fair value through other comprehensive income reserve 61 (298) Cash flow hedging reserve 489 (123) Own credit reserve (77) (121) Other reserves (24) (24) Total 4,608 3,361

Contingent liabilities and co_2

Contingent liabilities and commitments (Tables)	6 Months Ended
	Jun. 30, 2019
Contingent liabilities and commitments [abstract]
Contingent liabilities and commitments	As at As at 30.06.19 31.12.18 Contingent liabilities £m £m Guarantees and letters of credit pledged as collateral security 16,106 15,046 Performance guarantees, acceptances and endorsements 5,771 4,348 Total 21,877 19,394 Commitments Documentary credits and other short-term trade related transactions 1,273 1,741 Standby facilities, credit lines and other commitments 270,192 256,027 Total 271,465 257,768

Related party transactions (Tab

Related party transactions (Tables)	6 Months Ended
	Jun. 30, 2019
Related party transactions [abstract]
Barclays Bank Group's financial statements with other Barclays Group companies	Amounts included in the Barclays Bank Group’s financial statements with other Barclays Group companies are as follows: Half year ended 30.06.19 Half year ended 30.06.18 Parent Fellow subsidiaries Parent Fellow subsidiaries £m £m £m £m Total income (275) 32 (77) 1 Operating expenses (46) (1,546) (72) (2,045) As at 30.06.19 As at 31.12.18 Parent Fellow subsidiaries Parent Fellow subsidiaries £m £m £m £m Total assets 1,707 2,332 727 1,091 Total liabilities 26,315 1,272 21,405 2,058

Barclays Bank PLC parent cond_2

Barclays Bank PLC parent condensed balance sheet (Tables)	6 Months Ended
	Jun. 30, 2019
Barclays Bank PLC [member]
Condensed Balance Sheet Statements, Captions [Line Items]
Barclays Bank PLC condensed balance sheet	As at As at 30.06.19 31.12.18 Assets £m £m Cash and balances at central banks 104,789 126,002 Cash collateral and settlement balances 87,509 66,196 Loans and advances at amortised cost 159,466 156,764 Reverse repurchase agreements and other similar secured lending 12,108 5,766 Trading portfolio assets 89,066 73,480 Financial assets at fair value through the income statement 180,560 179,365 Derivative financial instruments 243,388 221,247 Financial assets at fair value through other comprehensive income 54,659 43,706 Investment in associates and joint ventures 138 140 Investment in subsidiaries 16,310 14,958 Goodwill and intangible assets 117 123 Property, plant and equipment 1 445 103 Current tax assets 1,782 1,439 Deferred tax assets 1,080 1,249 Retirement benefit schemes 1,850 1,748 Other assets 4,087 1,110 Total assets 957,354 893,396 Liabilities Deposits at amortised cost 240,920 231,017 Cash collateral and settlement balances 77,817 56,358 Repurchase agreements and other similar secured borrowing 10,031 11,113 Debt securities in issue 28,384 26,391 Subordinated liabilities 36,137 35,085 Trading portfolio liabilities 50,940 46,626 Financial liabilities designated at fair value 220,597 216,966 Derivative financial instruments 238,992 221,590 Current tax liabilities 379 376 Deferred tax liabilities 332 - Retirement benefit liabilities 115 124 Other liabilities 1 4,723 3,295 Provisions 610 818 Total liabilities 909,977 849,759 Equity Called up share capital and share premium 2,348 2,348 Other equity instruments 12,168 10,361 Other reserves 1,478 383 Retained earnings 31,383 30,545 Total equity 47,377 43,637 Total liabilities and equity 957,354 893,396 Barclays adopted the accounting standard IFRS 16 on 1 January 2019. The impact on adoption was an increase in property, plant and equipment of £ 0.3 bn, an increase in liabilities of £ 0.3 bn, with no material impact on retained earnings .

Other disclosures - Credit Ri_2

Other disclosures - Credit Risk (Tables)	6 Months Ended
	Jun. 30, 2019
Other disclosures - Credit Risk
Loans and advances at amortised cost by stage and product	Loans and advances at amortised cost by product The table below presents a breakdown of loans and advances at amortised cost and the impairment allowance with s tage allocation by asse t classification . Stage 2 As at 30.06.19 Stage 1 Not past due <=30 days past due >30 days past due Total Stage 3 Total 1 Gross exposure £m £m £m £m £m £m £m Home loans 11,262 614 60 92 766 1,183 13,211 Credit cards, unsecured loans and other retail lending 31,753 4,227 305 290 4,822 2,057 38,632 Corporate loans 86,126 7,695 595 1,000 9,290 1,136 96,552 Total 129,141 12,536 960 1,382 14,878 4,376 148,395 Impairment allowance Home loans 28 26 11 10 47 318 393 Credit cards, unsecured loans and other retail lending 349 563 105 143 811 1,423 2,583 Corporate loans 122 225 18 6 249 384 755 Total 499 814 134 159 1,107 2,125 3,731 Net exposure Home loans 11,234 588 49 82 719 865 12,818 Credit cards, unsecured loans and other retail lending 31,404 3,664 200 147 4,011 634 36,049 Corporate loans 86,004 7,470 577 994 9,041 752 95,797 Total 128,642 11,722 826 1,223 13,771 2,251 144,664 Coverage ratio % % % % % % % Home loans 0.2 4.2 18.3 10.9 6.1 26.9 3.0 Credit cards, unsecured loans and other retail lending 1.1 13.3 34.4 49.3 16.8 69.2 6.7 Corporate loans 0.1 2.9 3.0 0.6 2.7 33.8 0.8 Total 0.4 6.5 14.0 11.5 7.4 48.6 2.5 As at 31.12.18 Gross exposure £m £m £m £m £m £m £m Home loans 11,486 663 50 147 860 1,194 13,540 Credit cards, unsecured loans and other retail lending 29,548 4,381 305 240 4,926 2,078 36,552 Corporate loans 81,555 7,480 315 443 8,238 917 90,710 Total 122,589 12,524 670 830 14,024 4,189 140,802 Impairment allowance Home loans 26 29 9 9 47 307 380 Credit cards, unsecured loans and other retail lending 356 694 118 160 972 1,433 2,761 Corporate loans 107 214 11 11 236 359 702 Total 489 937 138 180 1,255 2,099 3,843 Net exposure Home loans 11,460 634 41 138 813 887 13,160 Credit cards, unsecured loans and other retail lending 29,192 3,687 187 80 3,954 645 33,791 Corporate loans 81,448 7,266 304 432 8,002 558 90,008 Total 122,100 11,587 532 650 12,769 2,090 136,959 Coverage ratio % % % % % % % Home loans 0.2 4.4 18.0 6.1 5.5 25.7 2.8 Credit cards, unsecured loans and other retail lending 1.2 15.8 38.7 66.7 19.7 69.0 7.6 Corporate loans 0.1 2.9 3.5 2.5 2.9 39.1 0.8 Total 0.4 7.5 20.6 21.7 8.9 50.1 2.7 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, accrued income and sundry debtors. These have a total gross exposure of £ 159.9 bn (December 2018: £ 120.1 bn) and impairment allowance of £ 21 m ( December 2018: £ 11 m). This comprises £ 13 m ( December 2018: £ 9 m) E xpected Credit Loss (ECL) on £ 159.4 bn ( December 2018: £ 119.6 bn) Stage 1 assets, £ 3 m ( December 2018: £ 2 m) on £ 0.5 bn ( December 2018: £ 0.5 bn) Stage 2 fair value through other comprehensive income assets and £ 5 m ( December 2018: £nil ) on £ 5 m ( December 2018: £nil ) Stage 3 other assets.
Movement in gross exposure and impairment allowance including provisions for loan commitments and financial guarantees	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. Explanation of the terms: 12-month ECL, lifetime ECL and credit-impaired are included in the Barclays Bank PLC Annual Report 2018 on page 173. Barclays Bank Group does not hold any material purchased or originated credit-impaired assets as at period end. Stage 1 Stage 2 Stage 3 Total Gross exposure for loans and advances at amortised cost £m £m £m £m As at 1 January 2019 122,589 14,024 4,189 140,802 Transfers from Stage 1 (4,661) 4,348 313 - Transfers from Stage 2 3,540 (4,255) 715 - Transfers from Stage 3 36 98 (134) - Business activity in the year 32,336 984 25 33,345 Net drawdowns and repayments (2,880) 1,482 331 (1,067) Final repayments (21,819) (1,803) (415) (24,037) Disposals - - (21) (21) Write-offs 1 - - (627) (627) As at 30 June 2019 129,141 14,878 4,376 148,395 Stage 1 Stage 2 Stage 3 Total Impairment allowance on loans and advances at amortised cost £m £m £m £m As at 1 January 2019 489 1,255 2,099 3,843 Transfers from Stage 1 (58) 51 7 - Transfers from Stage 2 246 (456) 210 - Transfers from Stage 3 1 7 (8) - Business activity in the year 95 39 5 139 Net re-measurement and movement due to exposure and risk parameter changes (243) 251 513 521 Final repayments (31) (40) (53) (124) Disposals - - (21) (21) Write-offs 1 - - (627) (627) As at 30 June 2019 2 499 1,107 2,125 3,731 Reconciliation of ECL movement to impairment charge/(release) for the period £m ECL movement excluding assets derecognised due to disposals and write-offs 536 Post write-off recoveries 1 (47) Exchange and other adjustments (7) Impairment charge on loan commitments and financial guarantees 22 Impairment charge on other financial assets 2 6 Income statement charge/(release) for the period 510 1 In H119 , gross write-offs amounted to £ 6 27 m ( H1 18: £ 788 m) and post write-off recoveries amounted to £ 47 m ( H1 18: £ 43 m). Net write-offs represent gross write-offs less post write-off recoveries and amounted to £ 5 80 m ( H1 18: £ 745 m) . 2 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, accrued income and sundry debtors. These have a total gross exposure of £ 159.9 bn ( December 2018: £ 120.1 bn) and impairment allowance of £ 21 m ( December 2018: £ 11 m). This comprises £ 13 m ECL ( December 2018: £ 9 m) on £ 159.4 bn stage 1 assets ( December 2018: £ 119.6 bn) and £ 3 m ( December 2018: £ 2 m) on £ 0.5 bn stage 2 fa ir value through other comprehensive income assets ( December 2018: £ 0.5 bn) and £ 5 m ( December 2018: £ nil ) on £ 5 m Stage 3 other assets ( December 20 18: £ nil ) . Stage 1 Stage 2 Stage 3 Total Gross exposure for loan commitments and financial guarantees £m £m £m £m As at 1 January 2019 248,590 16,444 421 265,455 Net transfers between stages (506) 142 364 - Business activity in the year 44,043 1,538 9 45,590 Net drawdowns and repayments (2,348) 997 (282) (1,633) Final repayments (27,183) (4,092) (234) (31,509) As at 30 June 2019 262,596 15,029 278 277,903 Stage 1 Stage 2 Stage 3 Total Impairment allowance on loan commitments and financial guarantees £m £m £m £m As at 1 January 2019 91 104 22 217 Net transfers between stages 8 (6) (2) - Business activity in the year 26 25 7 58 Net re-measurement and movement due to exposure and risk parameter changes (17) 14 6 3 Final repayments (15) (26) (1) (42) As at 30 June 2019 93 111 32 236

Basis of preparation (Details)

Basis of preparation (Details) - GBP (£) £ in Millions	6 Months Ended
	Jun. 30, 2019		Jun. 30, 2018	Dec. 31, 2018
Disclosure of expected impact of initial application of new standards or interpretations [line items]
Property, plant and equipment	£ 1,628	[1]		£ 947
Other liabilities	6,897	[1]		5,170
Profit after tax	£ 1,465		£ 384
IFRSs 16 [member]
Disclosure of expected impact of initial application of new standards or interpretations [line items]
Discussion of impact that initial application of new IFRS is expected to have on financial statements	IFRS 16 – Leases IFRS 16, Leases, which replaced IAS 17, Leases, was applied effective from 1 January 2019. IFRS 16 applies to all leases with the exception of licenses of intellectual property, rights held by licensing agreement within the scope of IAS 38, Intangible Assets, service concession arrangements, leases of biological assets 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 Barclays Bank Group has decided to apply. IFRS 16 does not result in a significant change to lessor accounting; however, for lessee accounting there is no longer a distinction between operating and finance leases. Lessees will be required to recognise both: A lease liability, measured at the present value of remaining cash 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 underlying 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 payments are made. The right of use asset will amortise to the income statement over the life of the lease. There is a recognition exemption in IFRS 16 for leases with a term not exceeding 12 months, which allows the lessee to apply similar accounting as an operating lease under IAS 17. The Barclays Bank Group applied IFRS 16 on a modified retrospective basis and took advantage of the option not to restate comparative periods. The Barclays Bank Group applied the following transition options available under the modified retrospective approach: To calculate the right of use asset equal to the lease liability, adjusted for prepaid or accrued payments. To rely on the previous assessment of whether leases are onerous in accordance with IAS 37 immediately before the date of initial application as an alternative to performing an impairment review. The Barclays Bank Group adjusted the carrying amount of the ROU asset at the date of initial application by the previous carrying amount of its onerous lease provision. To apply the recognition exception for leases with a term not exceeding 12 months. To use hindsight in determining the lease term if the contract contains options to extend or terminate the lease. The impact on adoption was an increase in property, plant and equipment of £0.5bn, and an increase in other liabilities of £0.5bn, with no material impact on retained earnings.
IFRSs 16 [member] | Increase (decrease) due to changes in accounting policy [member]
Disclosure of expected impact of initial application of new standards or interpretations [line items]
Property, plant and equipment				500
Other liabilities				£ 500
IFRIC Interpretation 23 [member]
Disclosure of expected impact of initial application of new standards or interpretations [line items]
Discussion of impact that initial application of new IFRS is expected to have on financial statements	IFRIC Interpretation 23 – Uncertainty over Income Tax Treatment IFRIC 23 clarifies the application of IAS 12 to accounting for income tax treatments that have yet to be accepted by tax authorities, in scenarios where it may be unclear how tax law applies to a particular transaction or circumstance, or whether a taxation authority will accept an entity’s tax treatment. IFRIC 23 has been applied from 1 January 2019. There was no significant effect from the adoption of IFRIC 23 in relation to accounting for uncertain tax positions.
IAS 12 update [member]
Disclosure of expected impact of initial application of new standards or interpretations [line items]
Discussion of impact that initial application of new IFRS is expected to have on financial statements	The IASB amended IAS 12 in order to clarify the accounting treatment of the income tax consequences of dividends. As a result of the amendment, the tax consequences of all payments on financial instruments that are classified as equity for accounting purposes, where those payments are considered to be a distribution of profit, will be included in, and will reduce, the income statement tax charge. The amendments of IAS 12 were applied to the income tax consequences of dividends recognised on or after the beginning of the earliest comparative period. This resulted in reducing the tax charge and increasing profit after tax for H119 by £77m and H118 by £84m. This change does not impact retained earnings.
IAS 12 update [member] | Increase (decrease) due to changes in accounting policy [member]
Disclosure of expected impact of initial application of new standards or interpretations [line items]
Profit after tax	£ 77		£ 84
IAS 19 Employee Benefits - Amendments to IAS 19 [member]
Disclosure of expected impact of initial application of new standards or interpretations [line items]
Discussion of impact that initial application of new IFRS is expected to have on financial statements	IAS 19 – Employee Benefits – Amendments to IAS 19 The IASB issued amendments to the guidance in IAS 19, Employee Benefits, in connection with accounting for plan amendments, curtailments and settlements. The amendments have been applied to plan amendments, curtailments or settlements occurring on or after 1 January 2019. There was no significant effect from the adoption of the amendments of IAS 19.
[1]	Barclays Bank PLC adopted the accounting standard IFRS 16 on 1 January 2019. The impact on adoption was an increase in property, plant and equipment of £ 0.5 bn, an increase in liabilities of £ 0.5 bn, with no material impact on re tained earnings

Segmental reporting - Analysis

Segmental reporting - Analysis of results by business (Details) - GBP (£) £ in Millions		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Disclosure of operating segments [line items]
Total income	[1]	£ 7,122	£ 7,253
Credit impairment charges and other provisions		(510)	(156)
Net operating income/(expenses)		6,612	7,097
Operating expenses		(4,910)	(6,384)
Other net income/(expenses)	[2]	23	12
Profit before tax		1,725	725
Total assets		969,266		£ 877,700
Operating segments [member] | Corporate and investment bank [member]
Disclosure of operating segments [line items]
Total income		5,149	5,373
Credit impairment charges and other provisions		(96)	182
Net operating income/(expenses)		5,053	5,555
Operating expenses		(3,615)	(3,628)
Other net income/(expenses)	[2]	15	8
Profit before tax		1,453	1,935
Total assets		882,100		792,500
Operating segments [member] | Consumer, cards and payments [member]
Disclosure of operating segments [line items]
Total income		2,193	2,137
Credit impairment charges and other provisions		(396)	(343)
Net operating income/(expenses)		1,797	1,794
Operating expenses		(1,211)	(1,134)
Other net income/(expenses)	[2]	16	17
Profit before tax		602	677
Total assets		73,100		71,600
Head Office [member]
Disclosure of operating segments [line items]
Total income		(220)	(257)
Credit impairment charges and other provisions		(18)	5
Net operating income/(expenses)		(238)	(252)
Operating expenses		(84)	(1,622)
Other net income/(expenses)	[2]	(8)	(13)
Profit before tax		(330)	£ (1,887)
Total assets		£ 14,100		£ 13,600
[1]	The geographic region is based on counterparty location
[2]	Other net income/(expenses) represents the share of post-tax results of associates and joint ventures, profit (or loss) on disposal of subsidiaries, associates and joint ventures and gains on acquisitions

Segmental reporting - Split of

Segmental reporting - Split of income by geographic region (Details) - GBP (£) £ in Millions		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018
Disclosure of operating segments [line items]
Total income	[1]	£ 7,122	£ 7,253
UK [member]
Disclosure of operating segments [line items]
Total income	[1]	2,000	2,118
Europe [member]
Disclosure of operating segments [line items]
Total income	[1]	863	1,026
Americas [member]
Disclosure of operating segments [line items]
Total income	[1]	3,825	3,735
Africa and middle east [member]
Disclosure of operating segments [line items]
Total income	[1]	75	62
Asia [member]
Disclosure of operating segments [line items]
Total income	[1]	£ 359	£ 312
[1]	The geographic region is based on counterparty location

Fee and commission income (Deta

Fee and commission income (Details) - GBP (£) £ in Millions		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018
Fee and commission income [abstract]
Revenue from contracts with customers		£ 3,736	£ 3,682
Other non-contract fee income		54	55
Fee and commission income		3,790	3,737
Fee and commission expenses		(961)	(875)
Net fee and commission income	[1]	2,829	2,862
Transactional member]
Fee and commission income [abstract]
Revenue from contracts with customers		1,353	1,257
Advisory [member]
Fee and commission income [abstract]
Revenue from contracts with customers		405	377
Brokerage and execution [member]
Fee and commission income [abstract]
Revenue from contracts with customers		536	583
Underwriting and syndication [member]
Fee and commission income [abstract]
Revenue from contracts with customers		1,240	1,368
Other [member]
Fee and commission income [abstract]
Revenue from contracts with customers		202	97
Operating segments [member] | Corporate and investment bank [member]
Fee and commission income [abstract]
Revenue from contracts with customers		2,363	2,449
Other non-contract fee income		54	55
Fee and commission income		2,417	2,504
Fee and commission expenses		(350)	(337)
Net fee and commission income		2,067	2,167
Operating segments [member] | Corporate and investment bank [member] | Transactional member]
Fee and commission income [abstract]
Revenue from contracts with customers		185	185
Operating segments [member] | Corporate and investment bank [member] | Advisory [member]
Fee and commission income [abstract]
Revenue from contracts with customers		364	340
Operating segments [member] | Corporate and investment bank [member] | Brokerage and execution [member]
Fee and commission income [abstract]
Revenue from contracts with customers		512	553
Operating segments [member] | Corporate and investment bank [member] | Underwriting and syndication [member]
Fee and commission income [abstract]
Revenue from contracts with customers		1,240	1,368
Operating segments [member] | Corporate and investment bank [member] | Other [member]
Fee and commission income [abstract]
Revenue from contracts with customers		62	3
Operating segments [member] | Consumer, cards and payments [member]
Fee and commission income [abstract]
Revenue from contracts with customers		1,357	1,217
Other non-contract fee income		0	0
Fee and commission income		1,357	1,217
Fee and commission expenses		(611)	(538)
Net fee and commission income		746	679
Operating segments [member] | Consumer, cards and payments [member] | Transactional member]
Fee and commission income [abstract]
Revenue from contracts with customers		1,168	1,072
Operating segments [member] | Consumer, cards and payments [member] | Advisory [member]
Fee and commission income [abstract]
Revenue from contracts with customers		41	37
Operating segments [member] | Consumer, cards and payments [member] | Brokerage and execution [member]
Fee and commission income [abstract]
Revenue from contracts with customers		24	30
Operating segments [member] | Consumer, cards and payments [member] | Underwriting and syndication [member]
Fee and commission income [abstract]
Revenue from contracts with customers		0	0
Operating segments [member] | Consumer, cards and payments [member] | Other [member]
Fee and commission income [abstract]
Revenue from contracts with customers		124	78
Head Office [member]
Fee and commission income [abstract]
Revenue from contracts with customers		16	16
Other non-contract fee income		0	0
Fee and commission income		16	16
Fee and commission expenses		0	0
Net fee and commission income		16	16
Head Office [member] | Transactional member]
Fee and commission income [abstract]
Revenue from contracts with customers		0	0
Head Office [member] | Advisory [member]
Fee and commission income [abstract]
Revenue from contracts with customers		0	0
Head Office [member] | Brokerage and execution [member]
Fee and commission income [abstract]
Revenue from contracts with customers		0	0
Head Office [member] | Underwriting and syndication [member]
Fee and commission income [abstract]
Revenue from contracts with customers		0	0
Head Office [member] | Other [member]
Fee and commission income [abstract]
Revenue from contracts with customers		£ 16	£ 16
[1]	For notes to the Financial Statements see pages 19 to 44

Fee and commission income (Narr

Fee and commission income (Narrative) (Details)	6 Months Ended
	Jun. 30, 2019
Transactional member]
Disclosure of disaggregation of revenue from contracts with customers [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. This includes interchange and merchant fee income generated from credit and bank card usage.
Advisory [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Description of methods used to recognise revenue from contracts with customers	Advisory fees are generated from asset management services and advisory services related to mergers, acquisitions and financial restructuring.
Brokerage and execution [member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Description of methods used to recognise revenue from contracts with customers	Brokerage and execution fees are earned for executing client transactions with exchanges and over-the-counter markets and assisting clients in clearing transactions.
Underwriting and syndication [member]
Disclosure of disaggregation of revenue from contracts with customers [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.

Tax (Narrative) (Details)

Tax (Narrative) (Details) - GBP (£) £ in Millions		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Reduction in tax charge	[1],[2]	£ (260)	£ (294)
Effective tax rate		15.10%	40.60%
IAS 12 update [member] | Increase (decrease) due to departure from requirement of IFRS [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Effective tax rate		19.50%
[1]	For notes to the Financial Statements see pages 19 to 44
[2]	From 2019, due to an IAS 12 update, the tax relief on payments in relation to A T1 instruments has been recognised in the tax charge of the income statement, whereas it was previously recorded in re tained earnings . Comparatives have been restated, reducing the tax charge for H118 by £ 84 m. Further detail can be found in Note 1, B asis of preparation on pages 19 to 20

Tax - Current and deferred tax

Tax - Current and deferred tax assets and liabilities (Details) - GBP (£) £ in Millions		Jun. 30, 2019	Dec. 31, 2018
Tax
Current tax assets	[1]	£ 2,041	£ 1,713
Deferred tax assets	[1]	2,677	2,970
Total		4,718	4,683
Current tax liabilities	[1]	(613)	(621)
Deferred tax liabilities	[1]	(332)	0
Total		£ (945)	£ (621)
[1]	For notes to the Financial Statements see pages 19 to 44

Tax - Deferred tax assets and l

Tax - Deferred tax assets and liabilities (Details) - GBP (£) £ in Millions		Jun. 30, 2019	Dec. 31, 2018
Analysis of net deferred tax
Deferred tax assets	[1]	£ 2,677	£ 2,970
Deferred tax liabilities	[1]	(332)	0
Temporary differences [member]
Analysis of net deferred tax
Deferred tax assets		2,289	2,441
Tax losses [member]
Analysis of net deferred tax
Deferred tax assets		388	529
USA [member]
Analysis of net deferred tax
Deferred tax assets		2,293	2,541
UK [member]
Analysis of net deferred tax
Deferred tax assets		0	3
Other [member]
Analysis of net deferred tax
Deferred tax assets		£ 384	£ 426
[1]	For notes to the Financial Statements see pages 19 to 44

Non-controlling interests (Deta

Non-controlling interests (Details) - GBP (£) £ in Millions		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Equity attributable to non-controlling interest	[1]	£ 0		£ 2
Other non-controlling interests [member]
Profit (loss), attributable to non-controlling interests		0	£ (1)
Equity attributable to non-controlling interest		£ 0		£ 2
[1]	For notes to the Financial Statements see pages 19 to 44

Dividends on ordinary shares (D

Dividends on ordinary shares (Details) - GBP (£) £ in Millions		6 Months Ended
		Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018
Total		£ 27	£ 515	£ 14,274
Equity attributable to owners of parent [member]
Dividends paid, ordinary shares	[1]	0		14,168
Dividends paid, preference shares		27		106
Total		£ 27	£ 515	£ 14,274
[1]	H118 included the dividend in specie of £ 14 bn paid to Barclays PLC for transferring the equity ownership in Barclays Bank UK PLC .

Dividends on ordinary shares (N

Dividends on ordinary shares (Narrative) (Details) - GBP (£) £ in Millions	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Disclosure of transactions between related parties [line items]
Interim dividend	£ 233
Barclays PLC [member] | UK Banking Businesses [member] | Barclays Bank UK PLC [member]
Disclosure of transactions between related parties [line items]
Dividend in specie		£ 14,000

Fair value of financial instr_3

Fair value of financial instruments - Assets and liabilities held at fair value disaggregated by valuation technique (fair value hierarchy) and balance sheet classification (Details) - GBP (£) £ in Millions	Jun. 30, 2019	Dec. 31, 2018
Disclosure of detailed information about financial instruments [line items]
Trading portfolio assets	£ 120,025	£ 104,038
Financial assets at fair value through the income statement	156,243	145,250
Derivative financial instruments	244,422	222,683
Financial assets at fair value through other comprehensive income	55,856	44,994
Trading portfolio liabilities	(41,335)	(36,614)
Financial liabilities designated at fair value	(229,875)	(217,741)
Derivative financial instruments	(243,004)	(219,592)
At fair value [member]
Disclosure of detailed information about financial instruments [line items]
Trading portfolio assets	120,025	104,038
Financial assets at fair value through the income statement	156,243	145,250
Derivative financial instruments	244,422	222,683
Financial assets at fair value through other comprehensive income	55,856	44,994
Investment property	8	9
Total assets	576,554	516,974
Trading portfolio liabilities	(41,335)	(36,614)
Financial liabilities designated at fair value	(229,875)	(217,741)
Derivative financial instruments	(243,004)	(219,592)
Total liabilities	(514,214)	(473,947)
Quoted market prices (Level 1) [member]
Disclosure of detailed information about financial instruments [line items]
Total assets	94,072	82,511
Total liabilities	(30,265)	(25,629)
Quoted market prices (Level 1) [member] | At fair value [member]
Disclosure of detailed information about financial instruments [line items]
Trading portfolio assets	58,369	51,029
Financial assets at fair value through the income statement	10,586	8,918
Derivative financial instruments	6,004	6,813
Financial assets at fair value through other comprehensive income	19,113	15,751
Investment property	0	0
Total assets	94,072	82,511
Trading portfolio liabilities	(24,439)	(19,401)
Financial liabilities designated at fair value	(98)	(76)
Derivative financial instruments	(5,728)	(6,152)
Total liabilities	(30,265)	(25,629)
Observable inputs (Level 2) [member]
Disclosure of detailed information about financial instruments [line items]
Total assets	469,368	420,621
Total liabilities	(478,860)	(443,311)
Observable inputs (Level 2) [member] | At fair value [member]
Disclosure of detailed information about financial instruments [line items]
Trading portfolio assets	58,108	49,396
Financial assets at fair value through the income statement	141,970	131,682
Derivative financial instruments	232,717	210,655
Financial assets at fair value through other comprehensive income	36,573	28,888
Investment property	0	0
Total assets	469,368	420,621
Trading portfolio liabilities	(16,890)	(17,210)
Financial liabilities designated at fair value	(229,493)	(217,404)
Derivative financial instruments	(232,477)	(208,697)
Total liabilities	(478,860)	(443,311)
Significant unobservable inputs (Level 3) [member]
Disclosure of detailed information about financial instruments [line items]
Total assets	13,114	13,842
Total liabilities	(5,089)	(5,007)
Significant unobservable inputs (Level 3) [member] | At fair value [member]
Disclosure of detailed information about financial instruments [line items]
Trading portfolio assets	3,548	3,613
Financial assets at fair value through the income statement	3,687	4,650
Derivative financial instruments	5,701	5,215
Financial assets at fair value through other comprehensive income	170	355
Investment property	8	9
Total assets	13,114	13,842
Trading portfolio liabilities	(6)	(3)
Financial liabilities designated at fair value	(284)	(261)
Derivative financial instruments	(4,799)	(4,743)
Total liabilities	£ (5,089)	£ (5,007)

Fair value of financial instr_4

Fair value of financial instruments - Assets and liabilities held at fair value disaggregated by valuation technique (fair value hierarchy) and product type (Details) - GBP (£) £ in Millions	Jun. 30, 2019		Dec. 31, 2018
Quoted market prices (Level 1) [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	£ 94,072		£ 82,511
Financial liabilities, at fair value	(30,265)		(25,629)
Quoted market prices (Level 1) [member] | Issued debt [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	0		0
Financial liabilities, at fair value	0		0
Quoted market prices (Level 1) [member] | Asset-backed securities [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	0		0
Financial liabilities, at fair value	0		0
Quoted market prices (Level 1) [member] | Margin lending [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	0		0
Financial liabilities, at fair value	0		0
Quoted market prices (Level 1) [member] | Government and government sponsored debt [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	46,619		38,910
Financial liabilities, at fair value	(11,321)		(8,143)
Quoted market prices (Level 1) [member] | Corporate debt [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	0		0
Financial liabilities, at fair value	0		0
Quoted market prices (Level 1) [member] | Certificates of deposit, commercial paper and other money market instruments [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	0		0
Financial liabilities, at fair value	0		0
Quoted market prices (Level 1) [member] | 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	0		0
Quoted market prices (Level 1) [member] | Non-asset backed loans [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	0		0
Financial liabilities, at fair value	0		0
Quoted market prices (Level 1) [member] | Equity cash products [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	41,347		36,705
Financial liabilities, at fair value	(13,118)		(11,258)
Quoted market prices (Level 1) [member] | Private equity investments [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	4		7
Financial liabilities, at fair value	0		0
Quoted market prices (Level 1) [member] | Other [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	98	[1]	76
Financial liabilities, at fair value	(98)	[1]	(76)
Quoted market prices (Level 1) [member] | Interest rate derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	0		0
Financial liabilities, at fair value	0		0
Quoted market prices (Level 1) [member] | Foreign exchange derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	0		0
Financial liabilities, at fair value	0		0
Quoted market prices (Level 1) [member] | Credit derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	0		0
Financial liabilities, at fair value	0		0
Quoted market prices (Level 1) [member] | Equity derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	6,004		6,813
Financial liabilities, at fair value	(5,728)		(6,152)
Quoted market prices (Level 1) [member] | Commodity derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	0		0
Financial liabilities, at fair value	0		0
Observable inputs (Level 2) [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	469,368		420,621
Financial liabilities, at fair value	(478,860)		(443,311)
Observable inputs (Level 2) [member] | Issued debt [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	0		0
Financial liabilities, at fair value	(47,402)		(42,104)
Observable inputs (Level 2) [member] | Asset-backed securities [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	3,157		2,265
Financial liabilities, at fair value	(28)		(245)
Observable inputs (Level 2) [member] | Margin lending [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	15,306		10,388
Financial liabilities, at fair value	(23,860)		(26,875)
Observable inputs (Level 2) [member] | Government and government sponsored debt [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	56,909		47,882
Financial liabilities, at fair value	(11,755)		(11,154)
Observable inputs (Level 2) [member] | Corporate debt [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	18,827		14,529
Financial liabilities, at fair value	(5,671)		(5,085)
Observable inputs (Level 2) [member] | Certificates of deposit, commercial paper and other money market instruments [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	554		1,135
Financial liabilities, at fair value	(7,939)		(8,556)
Observable inputs (Level 2) [member] | Reverse repurchase and repurchase agreements [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	123,464		118,623
Financial liabilities, at fair value	(148,870)		(139,361)
Observable inputs (Level 2) [member] | Non-asset backed loans [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	7,349		7,378
Financial liabilities, at fair value	0		0
Observable inputs (Level 2) [member] | Equity cash products [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	10,190		7,195
Financial liabilities, at fair value	(804)		(1,181)
Observable inputs (Level 2) [member] | Private equity investments [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	0		0
Financial liabilities, at fair value	0		0
Observable inputs (Level 2) [member] | Other [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	895	[1]	571
Financial liabilities, at fair value	(54)	[1]	(53)
Observable inputs (Level 2) [member] | Interest rate derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	152,892		122,975
Financial liabilities, at fair value	(145,912)		(118,231)
Observable inputs (Level 2) [member] | Foreign exchange derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	56,187		63,960
Financial liabilities, at fair value	(57,976)		(63,897)
Observable inputs (Level 2) [member] | Credit derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	11,565		9,374
Financial liabilities, at fair value	(11,626)		(9,188)
Observable inputs (Level 2) [member] | Equity derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	10,871		12,933
Financial liabilities, at fair value	(15,801)		(16,001)
Observable inputs (Level 2) [member] | Commodity derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	1,202		1,413
Financial liabilities, at fair value	(1,162)		(1,380)
Significant unobservable inputs (Level 3) [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	13,114		13,842
Financial liabilities, at fair value	(5,089)		(5,007)
Significant unobservable inputs (Level 3) [member] | Issued debt [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	0		0
Financial liabilities, at fair value	(263)		(251)
Significant unobservable inputs (Level 3) [member] | Asset-backed securities [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	669		688
Financial liabilities, at fair value	0		0
Significant unobservable inputs (Level 3) [member] | Margin lending [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	0		0
Financial liabilities, at fair value	0		0
Significant unobservable inputs (Level 3) [member] | Government and government sponsored debt [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	2		14
Financial liabilities, at fair value	0		0
Significant unobservable inputs (Level 3) [member] | Corporate debt [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	616		456
Financial liabilities, at fair value	(6)		0
Significant unobservable inputs (Level 3) [member] | Certificates of deposit, commercial paper and other money market instruments [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	0		0
Financial liabilities, at fair value	(21)		(10)
Significant unobservable inputs (Level 3) [member] | Reverse repurchase and repurchase agreements [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	13		768
Financial liabilities, at fair value	0		0
Significant unobservable inputs (Level 3) [member] | Non-asset backed loans [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	4,071		4,452
Financial liabilities, at fair value	0		0
Significant unobservable inputs (Level 3) [member] | Equity cash products [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	357		698
Financial liabilities, at fair value	0		(3)
Significant unobservable inputs (Level 3) [member] | Private equity investments [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	185		190
Financial liabilities, at fair value	0		0
Significant unobservable inputs (Level 3) [member] | Other [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	1,500	[1]	1,361
Financial liabilities, at fair value	0	[1]	0
Significant unobservable inputs (Level 3) [member] | Interest rate derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	2,320		2,478
Financial liabilities, at fair value	(2,071)		(2,456)
Significant unobservable inputs (Level 3) [member] | Foreign exchange derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	209		192
Financial liabilities, at fair value	(289)		(185)
Significant unobservable inputs (Level 3) [member] | Credit derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	1,448		1,381
Financial liabilities, at fair value	(369)		(331)
Significant unobservable inputs (Level 3) [member] | Equity derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	1,711		1,136
Financial liabilities, at fair value	(2,057)		(1,743)
Significant unobservable inputs (Level 3) [member] | Commodity derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	13		28
Financial liabilities, at fair value	£ (13)		£ (28)
[1]	Other includes commercial real estate loans, fund and fund-linked products, asset backed loans, physical commodities and investment property

Fair value of financial instr_5

Fair value of financial instruments - Analysis of movements in Level 3 assets and liabilities (Details) - Significant unobservable inputs (Level 3) [member] - GBP (£) £ in Millions		6 Months Ended
		Jun. 30, 2019		Jun. 30, 2018
Financial assets [abstract]
Beginning balance, financial assets		£ 13,842
Ending balance, financial assets		13,114
Financial liabilities [abstract]
Beginning balance, financial liabilities		(5,007)
Ending balance, financial liabilities		(5,089)
Net assets (liabilities) [abstract]
Ending balance, Assets (liabilities) net				£ 7,072
Recurring fair value measurement [member]
Net assets (liabilities) [abstract]
Beginning balance, Assets (liabilities) net		8,835		9,470
Purchases, fair value measurement, assets (liabilities) net		3,685		5,094
Sales, fair value measurement, assets (liabilities) net		(4,047)		(7,182)
Issues, fair value measurement, assets (liabilities) net		(16)		(4)
Settlements, fair value measurement, assets (liabilities) net		(165)		15
Transfers into Level 3 of fair value hierarchy, assets (liabilities) net		16		(388)
Transfers out of Level 3 of fair value hierarchy, assets (liabilities) net		(829)		21
Ending balance, Assets (liabilities) net		8,025		7,072
Recurring fair value measurement [member] | Net assets (liabilities) at fair value through profit or loss, category trading income [Member]
Net assets (liabilities) [abstract]
Gains (losses) recognised in profit or loss, fair value measurement, assets (liabilities) net		367		(119)
Recurring fair value measurement [member] | Net assets (liabilities) at fair value through profit or loss, category other income [Member]
Net assets (liabilities) [abstract]
Gains (losses) recognised in profit or loss, fair value measurement, assets (liabilities) net		179		165
Recurring fair value measurement [member] | Net derivative financial instruments [member]
Net assets (liabilities) [abstract]
Beginning balance, Assets (liabilities) net		472	[1]	137	[2]
Purchases, fair value measurement, assets (liabilities) net		(188)	[1]	24	[2]
Sales, fair value measurement, assets (liabilities) net		(1)	[1]	(428)	[2]
Issues, fair value measurement, assets (liabilities) net		0	[1]	0	[2]
Settlements, fair value measurement, assets (liabilities) net		84	[1]	285	[2]
Transfers into Level 3 of fair value hierarchy, assets (liabilities) net		(172)	[1]	(301)	[2]
Transfers out of Level 3 of fair value hierarchy, assets (liabilities) net		457	[1]	213	[2]
Ending balance, Assets (liabilities) net		902	[1]	(227)	[2]
Recurring fair value measurement [member] | Net derivative financial instruments [member] | Net assets (liabilities) at fair value through profit or loss, category trading income [Member]
Net assets (liabilities) [abstract]
Gains (losses) recognised in profit or loss, fair value measurement, assets (liabilities) net		250	[1]	(157)	[2]
Recurring fair value measurement [member] | Net derivative financial instruments [member] | Net assets (liabilities) at fair value through profit or loss, category other income [Member]
Net assets (liabilities) [abstract]
Gains (losses) recognised in profit or loss, fair value measurement, assets (liabilities) net		0	[1]	0	[2]
Recurring fair value measurement [member] | Investment property [member]
Financial assets [abstract]
Beginning balance, financial assets		9		116
Purchases, fair value measurement, assets		0		0
Sales, fair value measurement, assets		0		(104)
Issues, fair value measurement, assets		0		0
Settlements, fair value measurement, assets		0		(5)
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		8		11
Recurring fair value measurement [member] | Investment property [member] | Financial assets at fair value through profit or loss, category trading [member]
Financial assets [abstract]
Total gains and losses in the period recognised in the income statement, assets		0		0
Recurring fair value measurement [member] | Investment property [member] | Financial assets at fair value through profit or loss, category other income [member]
Financial assets [abstract]
Total gains and losses in the period recognised in the income statement, assets		(1)		4
Issued debt [member]
Financial assets [abstract]
Beginning balance, financial assets		0
Ending balance, financial assets		0
Financial liabilities [abstract]
Beginning balance, financial liabilities		(251)
Ending balance, financial liabilities		(263)
Trading portfolio liabilities [member] | Recurring fair value measurement [member]
Financial liabilities [abstract]
Beginning balance, financial liabilities		(3)		(4)
Purchases, fair value measurement, liabilities		0		0
Sales, fair value measurement, liabilities		0		2
Issues, fair value measurement, liabilities		0		0
Settlements, fair value measurement, liabilities		0		0
Transfers into Level 3 of fair value hierarchy, liabilities		(5)		2
Transfers out of Level 3 of fair value hierarchy, liabilities		0		0
Ending balance, financial liabilities		(6)		0
Trading portfolio liabilities [member] | Recurring fair value measurement [member] | Financial liabilities at fair value through profit or loss, category trading [member]
Financial liabilities [abstract]
Total gains and losses in the period recognised in the income statement, liabilities		2		0
Trading portfolio liabilities [member] | Recurring fair value measurement [member] | Financial liabilities at fair value through profit or loss, category other income [member]
Financial liabilities [abstract]
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]
Financial liabilities [abstract]
Beginning balance, financial liabilities		(261)		(480)
Purchases, fair value measurement, liabilities		0		0
Sales, fair value measurement, liabilities		0		218
Issues, fair value measurement, liabilities		(16)		(4)
Settlements, fair value measurement, liabilities		2		6
Transfers into Level 3 of fair value hierarchy, liabilities		(14)		(219)
Transfers out of Level 3 of fair value hierarchy, liabilities		1		125
Ending balance, financial liabilities		(284)		(337)
Financial liabilities designated at fair value [member] | Recurring fair value measurement [member] | Financial liabilities at fair value through profit or loss, category trading [member]
Financial liabilities [abstract]
Total gains and losses in the period recognised in the income statement, liabilities		5		19
Financial liabilities designated at fair value [member] | Recurring fair value measurement [member] | Financial liabilities at fair value through profit or loss, category other income [member]
Financial liabilities [abstract]
Total gains and losses in the period recognised in the income statement, liabilities		(1)		(2)
Financial liabilities designated at fair value [member] | Issued debt [member] | Recurring fair value measurement [member]
Financial liabilities [abstract]
Beginning balance, financial liabilities		(251)		(214)
Purchases, fair value measurement, liabilities		0		0
Sales, fair value measurement, liabilities		0		0
Issues, fair value measurement, liabilities		(16)		(4)
Settlements, fair value measurement, liabilities		1		4
Transfers into Level 3 of fair value hierarchy, liabilities		(3)		(219)
Transfers out of Level 3 of fair value hierarchy, liabilities		1		125
Ending balance, financial liabilities		(263)		(289)
Financial liabilities designated at fair value [member] | Issued debt [member] | Recurring fair value measurement [member] | Financial liabilities at fair value through profit or loss, category trading [member]
Financial liabilities [abstract]
Total gains and losses in the period recognised in the income statement, liabilities		5		19
Financial liabilities designated at fair value [member] | Issued debt [member] | Recurring fair value measurement [member] | Financial liabilities at fair value through profit or loss, category other income [member]
Financial liabilities [abstract]
Total gains and losses in the period recognised in the income statement, liabilities		0		0
Asset-backed loans [member]
Financial assets [abstract]
Beginning balance, financial assets		688
Ending balance, financial assets		669
Financial liabilities [abstract]
Beginning balance, financial liabilities		0
Ending balance, financial liabilities		0
Interest rate derivatives [member]
Financial assets [abstract]
Beginning balance, financial assets		2,478
Ending balance, financial assets		2,320
Financial liabilities [abstract]
Beginning balance, financial liabilities		(2,456)
Ending balance, financial liabilities		(2,071)
Interest rate derivatives [member] | Recurring fair value measurement [member] | Net derivative financial instruments [member]
Net assets (liabilities) [abstract]
Beginning balance, Assets (liabilities) net		22		(150)
Purchases, fair value measurement, assets (liabilities) net		(3)		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		76		96
Transfers into Level 3 of fair value hierarchy, assets (liabilities) net		(107)		(343)
Transfers out of Level 3 of fair value hierarchy, assets (liabilities) net		145		58
Ending balance, Assets (liabilities) net		249		(385)
Interest rate derivatives [member] | Recurring fair value measurement [member] | Net derivative financial instruments [member] | Net assets (liabilities) at fair value through profit or loss, category trading income [Member]
Net assets (liabilities) [abstract]
Gains (losses) recognised in profit or loss, fair value measurement, assets (liabilities) net		116		(46)
Interest rate derivatives [member] | Recurring fair value measurement [member] | Net derivative financial instruments [member] | Net assets (liabilities) at fair value through profit or loss, category other income [Member]
Net assets (liabilities) [abstract]
Gains (losses) recognised in profit or loss, fair value measurement, assets (liabilities) net		0		0
Foreign exchange derivatives [member]
Financial assets [abstract]
Beginning balance, financial assets		192
Ending balance, financial assets		209
Financial liabilities [abstract]
Beginning balance, financial liabilities		(185)
Ending balance, financial liabilities		(289)
Foreign exchange derivatives [member] | Recurring fair value measurement [member] | Net derivative financial instruments [member]
Net assets (liabilities) [abstract]
Beginning balance, Assets (liabilities) net		7		37
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		(12)		(17)
Transfers into Level 3 of fair value hierarchy, assets (liabilities) net		(51)		8
Transfers out of Level 3 of fair value hierarchy, assets (liabilities) net		17		(18)
Ending balance, Assets (liabilities) net		(80)		(20)
Foreign exchange derivatives [member] | Recurring fair value measurement [member] | Net derivative financial instruments [member] | Net assets (liabilities) at fair value through profit or loss, category trading income [Member]
Net assets (liabilities) [abstract]
Gains (losses) recognised in profit or loss, fair value measurement, assets (liabilities) net		(41)		(30)
Foreign exchange derivatives [member] | Recurring fair value measurement [member] | Net derivative financial instruments [member] | Net assets (liabilities) at fair value through profit or loss, category other income [Member]
Net assets (liabilities) [abstract]
Gains (losses) recognised in profit or loss, fair value measurement, assets (liabilities) net		0		0
Credit derivatives [member]
Financial assets [abstract]
Beginning balance, financial assets		1,381
Ending balance, financial assets		1,448
Financial liabilities [abstract]
Beginning balance, financial liabilities		(331)
Ending balance, financial liabilities		(369)
Credit derivatives [member] | Recurring fair value measurement [member] | Net derivative financial instruments [member]
Net assets (liabilities) [abstract]
Beginning balance, Assets (liabilities) net		1,050		1,146
Purchases, fair value measurement, assets (liabilities) net		(63)		2
Sales, fair value measurement, assets (liabilities) net		4		3
Issues, fair value measurement, assets (liabilities) net		0		0
Settlements, fair value measurement, assets (liabilities) net		(3)		(15)
Transfers into Level 3 of fair value hierarchy, assets (liabilities) net		2		1
Transfers out of Level 3 of fair value hierarchy, assets (liabilities) net		3		(2)
Ending balance, Assets (liabilities) net		1,079		925
Credit derivatives [member] | Recurring fair value measurement [member] | Net derivative financial instruments [member] | Net assets (liabilities) at fair value through profit or loss, category trading income [Member]
Net assets (liabilities) [abstract]
Gains (losses) recognised in profit or loss, fair value measurement, assets (liabilities) net		86		(210)
Credit derivatives [member] | Recurring fair value measurement [member] | Net derivative financial instruments [member] | Net assets (liabilities) at fair value through profit or loss, category other income [Member]
Net assets (liabilities) [abstract]
Gains (losses) recognised in profit or loss, fair value measurement, assets (liabilities) net		0		0
Equity derivatives [member]
Financial assets [abstract]
Beginning balance, financial assets		1,136
Ending balance, financial assets		1,711
Financial liabilities [abstract]
Beginning balance, financial liabilities		(1,743)
Ending balance, financial liabilities		(2,057)
Equity derivatives [member] | Recurring fair value measurement [member] | Net derivative financial instruments [member]
Net assets (liabilities) [abstract]
Beginning balance, Assets (liabilities) net		(607)		(896)
Purchases, fair value measurement, assets (liabilities) net		(122)		22
Sales, fair value measurement, assets (liabilities) net		(5)		(431)
Issues, fair value measurement, assets (liabilities) net		0		0
Settlements, fair value measurement, assets (liabilities) net		23		221
Transfers into Level 3 of fair value hierarchy, assets (liabilities) net		(16)		33
Transfers out of Level 3 of fair value hierarchy, assets (liabilities) net		292		175
Ending balance, Assets (liabilities) net		(346)		(747)
Equity derivatives [member] | Recurring fair value measurement [member] | Net derivative financial instruments [member] | Net assets (liabilities) at fair value through profit or loss, category trading income [Member]
Net assets (liabilities) [abstract]
Gains (losses) recognised in profit or loss, fair value measurement, assets (liabilities) net		89		129
Equity derivatives [member] | Recurring fair value measurement [member] | Net derivative financial instruments [member] | Net assets (liabilities) at fair value through profit or loss, category other income [Member]
Net assets (liabilities) [abstract]
Gains (losses) recognised in profit or loss, fair value measurement, assets (liabilities) net		0		0
Commodity derivatives [member]
Financial assets [abstract]
Beginning balance, financial assets		28
Ending balance, financial assets		13
Financial liabilities [abstract]
Beginning balance, financial liabilities		(28)
Ending balance, financial liabilities		(13)
Commodity derivatives [member] | Recurring fair value measurement [member] | Net derivative financial instruments [member]
Net assets (liabilities) [abstract]
Beginning balance, Assets (liabilities) net		0
Purchases, fair value measurement, assets (liabilities) net		0
Sales, fair value measurement, assets (liabilities) net		0
Issues, fair value measurement, assets (liabilities) net		0
Settlements, fair value measurement, assets (liabilities) net		0
Transfers into Level 3 of fair value hierarchy, assets (liabilities) net		0
Transfers out of Level 3 of fair value hierarchy, assets (liabilities) net		0
Ending balance, Assets (liabilities) net		0
Commodity derivatives [member] | Recurring fair value measurement [member] | Net derivative financial instruments [member] | Net assets (liabilities) at fair value through profit or loss, category trading income [Member]
Net assets (liabilities) [abstract]
Gains (losses) recognised in profit or loss, fair value measurement, assets (liabilities) net		0
Commodity derivatives [member] | Recurring fair value measurement [member] | Net derivative financial instruments [member] | Net assets (liabilities) at fair value through profit or loss, category other income [Member]
Net assets (liabilities) [abstract]
Gains (losses) recognised in profit or loss, fair value measurement, assets (liabilities) net		0
Government and government sponsored debt [member]
Financial assets [abstract]
Beginning balance, financial assets		14
Ending balance, financial assets		2
Financial liabilities [abstract]
Beginning balance, financial liabilities		0
Ending balance, financial liabilities		0
Corporate debt [member]
Financial assets [abstract]
Beginning balance, financial assets		456
Ending balance, financial assets		616
Financial liabilities [abstract]
Beginning balance, financial liabilities		0
Ending balance, financial liabilities		(6)
Non-asset backed loans [member]
Financial assets [abstract]
Beginning balance, financial assets		4,452
Ending balance, financial assets		4,071
Financial liabilities [abstract]
Beginning balance, financial liabilities		0
Ending balance, financial liabilities		0
Equity cash products [member]
Financial assets [abstract]
Beginning balance, financial assets		698
Ending balance, financial assets		357
Financial liabilities [abstract]
Beginning balance, financial liabilities		(3)
Ending balance, financial liabilities		0
Private equity investments [member]
Financial assets [abstract]
Beginning balance, financial assets		190
Ending balance, financial assets		185
Financial liabilities [abstract]
Beginning balance, financial liabilities		0
Ending balance, financial liabilities		0
Other [member]
Financial assets [abstract]
Beginning balance, financial assets		1,361
Ending balance, financial assets	[3]	1,500
Financial liabilities [abstract]
Beginning balance, financial liabilities		0
Ending balance, financial liabilities	[3]	0
Other [member] | Financial liabilities designated at fair value [member] | Recurring fair value measurement [member]
Financial liabilities [abstract]
Beginning balance, financial liabilities				(16)
Purchases, fair value measurement, liabilities				0
Sales, fair value measurement, liabilities				16
Settlements, fair value measurement, liabilities				2
Transfers into Level 3 of fair value hierarchy, liabilities				0
Transfers out of Level 3 of fair value hierarchy, liabilities				0
Ending balance, financial liabilities				0
Other [member] | Financial liabilities designated at fair value [member] | Recurring fair value measurement [member] | Financial liabilities at fair value through profit or loss, category trading [member]
Financial liabilities [abstract]
Total gains and losses in the period recognised in the income statement, liabilities				0
Other [member] | Financial liabilities designated at fair value [member] | Recurring fair value measurement [member] | Financial liabilities at fair value through profit or loss, category other income [member]
Financial liabilities [abstract]
Total gains and losses in the period recognised in the income statement, liabilities				(2)
Certificates of deposit, commercial paper and other money market instruments [member]
Financial assets [abstract]
Beginning balance, financial assets		0
Ending balance, financial assets		0
Financial liabilities [abstract]
Beginning balance, financial liabilities		(10)
Ending balance, financial liabilities		(21)
Certificates of deposit, commercial paper and other money market instruments [member] | Financial liabilities designated at fair value [member] | Recurring fair value measurement [member]
Financial liabilities [abstract]
Beginning balance, financial liabilities		(10)		(250)
Purchases, fair value measurement, liabilities		0		0
Sales, fair value measurement, liabilities		0		202
Issues, fair value measurement, liabilities		0
Settlements, fair value measurement, liabilities		1		0
Transfers into Level 3 of fair value hierarchy, liabilities		(11)		0
Transfers out of Level 3 of fair value hierarchy, liabilities		0		0
Ending balance, financial liabilities		(21)		(48)
Certificates of deposit, commercial paper and other money market instruments [member] | Financial liabilities designated at fair value [member] | Recurring fair value measurement [member] | Financial liabilities at fair value through profit or loss, category trading [member]
Financial liabilities [abstract]
Total gains and losses in the period recognised in the income statement, liabilities		0		0
Certificates of deposit, commercial paper and other money market instruments [member] | Financial liabilities designated at fair value [member] | Recurring fair value measurement [member] | Financial liabilities at fair value through profit or loss, category other income [member]
Financial liabilities [abstract]
Total gains and losses in the period recognised in the income statement, liabilities		(1)		0
Trading portfolio assets [member] | Recurring fair value measurement [member]
Financial assets [abstract]
Beginning balance, financial assets		3,613		1,977
Purchases, fair value measurement, assets		1,436		2,389
Sales, fair value measurement, assets		(1,424)		(366)
Issues, fair value measurement, assets		0		0
Settlements, fair value measurement, assets		(51)		(33)
Transfers into Level 3 of fair value hierarchy, assets		183		130
Transfers out of Level 3 of fair value hierarchy, assets		(228)		(267)
Ending balance, financial assets		3,548		3,841
Trading portfolio assets [member] | Recurring fair value measurement [member] | Financial assets at fair value through profit or loss, category trading [member]
Financial assets [abstract]
Total gains and losses in the period recognised in the income statement, assets		19		11
Trading portfolio assets [member] | Recurring fair value measurement [member] | Financial assets at fair value through profit or loss, category other income [member]
Financial assets [abstract]
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]
Financial assets [abstract]
Beginning balance, financial assets		664		627
Purchases, fair value measurement, assets		81		100
Sales, fair value measurement, assets		(127)		(99)
Issues, fair value measurement, assets		0		0
Settlements, fair value measurement, assets		0		0
Transfers into Level 3 of fair value hierarchy, assets		16		5
Transfers out of Level 3 of fair value hierarchy, assets		(29)		(30)
Ending balance, financial assets		610		592
Trading portfolio assets [member] | Asset-backed loans [member] | Recurring fair value measurement [member] | Financial assets at fair value through profit or loss, category trading [member]
Financial assets [abstract]
Total gains and losses in the period recognised in the income statement, assets		5		(11)
Trading portfolio assets [member] | Asset-backed loans [member] | Recurring fair value measurement [member] | Financial assets at fair value through profit or loss, category other income [member]
Financial assets [abstract]
Total gains and losses in the period recognised in the income statement, assets		0		0
Trading portfolio assets [member] | Government and government sponsored debt [member] | Recurring fair value measurement [member]
Financial assets [abstract]
Beginning balance, financial assets		14		49
Purchases, fair value measurement, assets		2		11
Sales, fair value measurement, assets		0		0
Issues, fair value measurement, assets		0		0
Settlements, fair value measurement, assets		0		0
Transfers into Level 3 of fair value hierarchy, assets		0		0
Transfers out of Level 3 of fair value hierarchy, assets		(14)		(35)
Ending balance, financial assets		2		25
Trading portfolio assets [member] | Government and government sponsored debt [member] | Recurring fair value measurement [member] | Financial assets at fair value through profit or loss, category trading [member]
Financial assets [abstract]
Total gains and losses in the period recognised in the income statement, assets		0		0
Trading portfolio assets [member] | Government and government sponsored debt [member] | Recurring fair value measurement [member] | Financial assets at fair value through profit or loss, category other income [member]
Financial assets [abstract]
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]
Financial assets [abstract]
Beginning balance, financial assets		388		871
Purchases, fair value measurement, assets		70		35
Sales, fair value measurement, assets		(24)		(17)
Issues, fair value measurement, assets		0		0
Settlements, fair value measurement, assets		(31)		(23)
Transfers into Level 3 of fair value hierarchy, assets		32		15
Transfers out of Level 3 of fair value hierarchy, assets		(74)		(6)
Ending balance, financial assets		375		881
Trading portfolio assets [member] | Corporate debt [member] | Recurring fair value measurement [member] | Financial assets at fair value through profit or loss, category trading [member]
Financial assets [abstract]
Total gains and losses in the period recognised in the income statement, assets		14		6
Trading portfolio assets [member] | Corporate debt [member] | Recurring fair value measurement [member] | Financial assets at fair value through profit or loss, category other income [member]
Financial assets [abstract]
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]
Financial assets [abstract]
Beginning balance, financial assets		2,263		166
Purchases, fair value measurement, assets		1,235		2,239
Sales, fair value measurement, assets		(1,260)		(239)
Issues, fair value measurement, assets		0		0
Settlements, fair value measurement, assets		(19)		0
Transfers into Level 3 of fair value hierarchy, assets		19		11
Transfers out of Level 3 of fair value hierarchy, assets		(90)		(6)
Ending balance, financial assets		2,160		2,173
Trading portfolio assets [member] | Non-asset backed loans [member] | Recurring fair value measurement [member] | Financial assets at fair value through profit or loss, category trading [member]
Financial assets [abstract]
Total gains and losses in the period recognised in the income statement, assets		12		2
Trading portfolio assets [member] | Non-asset backed loans [member] | Recurring fair value measurement [member] | Financial assets at fair value through profit or loss, category other income [member]
Financial assets [abstract]
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]
Financial assets [abstract]
Beginning balance, financial assets		136		68
Purchases, fair value measurement, assets		48		0
Sales, fair value measurement, assets		(13)		(7)
Issues, fair value measurement, assets		0		0
Settlements, fair value measurement, assets		0		0
Transfers into Level 3 of fair value hierarchy, assets		116		75
Transfers out of Level 3 of fair value hierarchy, assets		(20)		(52)
Ending balance, financial assets		265		119
Trading portfolio assets [member] | Equity cash products [member] | Recurring fair value measurement [member] | Financial assets at fair value through profit or loss, category trading [member]
Financial assets [abstract]
Total gains and losses in the period recognised in the income statement, assets		(2)		35
Trading portfolio assets [member] | Equity cash products [member] | Recurring fair value measurement [member] | Financial assets at fair value through profit or loss, category other income [member]
Financial assets [abstract]
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]
Financial assets [abstract]
Beginning balance, financial assets		148		196
Purchases, fair value measurement, assets		0		4
Sales, fair value measurement, assets		0		(4)
Issues, fair value measurement, assets		0		0
Settlements, fair value measurement, assets		(1)		(10)
Transfers into Level 3 of fair value hierarchy, assets		0		24
Transfers out of Level 3 of fair value hierarchy, assets		(1)		(138)
Ending balance, financial assets		136		51
Trading portfolio assets [member] | Other [member] | Recurring fair value measurement [member] | Financial assets at fair value through profit or loss, category trading [member]
Financial assets [abstract]
Total gains and losses in the period recognised in the income statement, assets		(10)		(21)
Trading portfolio assets [member] | Other [member] | Recurring fair value measurement [member] | Financial assets at fair value through profit or loss, category other income [member]
Financial assets [abstract]
Total gains and losses in the period recognised in the income statement, assets		0		0
Financial assets at fair value through income statement [member] | Recurring fair value measurement [member]
Financial assets [abstract]
Beginning balance, financial assets		4,650		7,519
Purchases, fair value measurement, assets		2,349		2,681
Sales, fair value measurement, assets		(2,622)		(6,436)
Issues, fair value measurement, assets		0		0
Settlements, fair value measurement, assets		(145)		(238)
Transfers into Level 3 of fair value hierarchy, assets		24		0
Transfers out of Level 3 of fair value hierarchy, assets		(841)		(18)
Ending balance, financial assets		3,687		3,679
Financial assets at fair value through income statement [member] | Recurring fair value measurement [member] | Financial assets at fair value through profit or loss, category trading [member]
Financial assets [abstract]
Total gains and losses in the period recognised in the income statement, assets		91		8
Financial assets at fair value through income statement [member] | Recurring fair value measurement [member] | Financial assets at fair value through profit or loss, category other income [member]
Financial assets [abstract]
Total gains and losses in the period recognised in the income statement, assets		181		163
Financial assets at fair value through income statement [member] | Non-asset backed loans [member] | Recurring fair value measurement [member]
Financial assets [abstract]
Beginning balance, financial assets		1,836		6,073
Purchases, fair value measurement, assets		2		16
Sales, fair value measurement, assets		0		(4,432)
Issues, fair value measurement, assets		0		0
Settlements, fair value measurement, assets		(132)		(238)
Transfers into Level 3 of fair value hierarchy, assets		0		0
Transfers out of Level 3 of fair value hierarchy, assets		(1)		(4)
Ending balance, financial assets		1,775		1,419
Financial assets at fair value through income statement [member] | Non-asset backed loans [member] | Recurring fair value measurement [member] | Financial assets at fair value through profit or loss, category trading [member]
Financial assets [abstract]
Total gains and losses in the period recognised in the income statement, assets		70		4
Financial assets at fair value through income statement [member] | Non-asset backed loans [member] | Recurring fair value measurement [member] | Financial assets at fair value through profit or loss, category other income [member]
Financial assets [abstract]
Total gains and losses in the period recognised in the income statement, assets		0		0
Financial assets at fair value through income statement [member] | Equity cash products [member] | Recurring fair value measurement [member]
Financial assets [abstract]
Beginning balance, financial assets		559		8
Purchases, fair value measurement, assets		9		11
Sales, fair value measurement, assets		0		0
Issues, fair value measurement, assets		0		0
Settlements, fair value measurement, assets		(10)		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		740		19
Financial assets at fair value through income statement [member] | Equity cash products [member] | Recurring fair value measurement [member] | Financial assets at fair value through profit or loss, category trading [member]
Financial assets [abstract]
Total gains and losses in the period recognised in the income statement, assets		4		0
Financial assets at fair value through income statement [member] | Equity cash products [member] | Recurring fair value measurement [member] | Financial assets at fair value through profit or loss, category other income [member]
Financial assets [abstract]
Total gains and losses in the period recognised in the income statement, assets		178		0
Financial assets at fair value through income statement [member] | Private equity investments [member] | Recurring fair value measurement [member]
Financial assets [abstract]
Beginning balance, financial assets		191		688
Purchases, fair value measurement, assets		4		295
Sales, fair value measurement, assets		(3)		(37)
Issues, fair value measurement, assets		0		0
Settlements, fair value measurement, assets		(1)		0
Transfers into Level 3 of fair value hierarchy, assets		0		0
Transfers out of Level 3 of fair value hierarchy, assets		0		(14)
Ending balance, financial assets		185		985
Financial assets at fair value through income statement [member] | Private equity investments [member] | Recurring fair value measurement [member] | Financial assets at fair value through profit or loss, category trading [member]
Financial assets [abstract]
Total gains and losses in the period recognised in the income statement, assets		0		0
Financial assets at fair value through income statement [member] | Private equity investments [member] | Recurring fair value measurement [member] | Financial assets at fair value through profit or loss, category other income [member]
Financial assets [abstract]
Total gains and losses in the period recognised in the income statement, assets		(6)		53
Financial assets at fair value through income statement [member] | Other [member] | Recurring fair value measurement [member]
Financial assets [abstract]
Beginning balance, financial assets		2,064		750
Purchases, fair value measurement, assets		2,334		2,359
Sales, fair value measurement, assets		(2,619)		(1,967)
Issues, fair value measurement, assets		0		0
Settlements, fair value measurement, assets		(2)		0
Transfers into Level 3 of fair value hierarchy, assets		24		0
Transfers out of Level 3 of fair value hierarchy, assets		(840)		0
Ending balance, financial assets		987		1,256
Financial assets at fair value through income statement [member] | Other [member] | Recurring fair value measurement [member] | Financial assets at fair value through profit or loss, category trading [member]
Financial assets [abstract]
Total gains and losses in the period recognised in the income statement, assets		17		4
Financial assets at fair value through income statement [member] | Other [member] | Recurring fair value measurement [member] | Financial assets at fair value through profit or loss, category other income [member]
Financial assets [abstract]
Total gains and losses in the period recognised in the income statement, assets		9		110
Financial assets at fair value through other comprehensive income [member] | Recurring fair value measurement [member]
Financial assets [abstract]
Beginning balance, financial assets		355		205
Purchases, fair value measurement, assets		88		0
Sales, fair value measurement, assets		0		(68)
Issues, fair value measurement, assets		0		0
Settlements, fair value measurement, assets		(55)		0
Transfers into Level 3 of fair value hierarchy, assets		0		0
Transfers out of Level 3 of fair value hierarchy, assets		(218)		(32)
Ending balance, financial assets		170		105
Financial assets at fair value through other comprehensive income [member] | Recurring fair value measurement [member] | Financial assets at fair value through profit or loss, category trading [member]
Financial assets [abstract]
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] | Financial assets at fair value through profit or loss, category other income [member]
Financial assets [abstract]
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]
Financial assets [abstract]
Beginning balance, financial assets		0
Purchases, fair value measurement, assets		40
Sales, fair value measurement, assets		0
Issues, fair value measurement, assets		0
Settlements, fair value measurement, 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		40
Financial assets at fair value through other comprehensive income [member] | Asset-backed loans [member] | Recurring fair value measurement [member] | Financial assets at fair value through profit or loss, category trading [member]
Financial assets [abstract]
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] | Financial assets at fair value through profit or loss, category other income [member]
Financial assets [abstract]
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]
Financial assets [abstract]
Beginning balance, financial assets		353
Purchases, fair value measurement, assets		48
Sales, fair value measurement, assets		0
Issues, fair value measurement, assets		0
Settlements, fair value measurement, assets		(55)
Transfers into Level 3 of fair value hierarchy, assets		0
Transfers out of Level 3 of fair value hierarchy, assets		(218)
Ending balance, financial assets		128
Financial assets at fair value through other comprehensive income [member] | Non-asset backed loans [member] | Recurring fair value measurement [member] | Financial assets at fair value through profit or loss, category trading [member]
Financial assets [abstract]
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] | Financial assets at fair value through profit or loss, category other income [member]
Financial assets [abstract]
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]
Financial assets [abstract]
Beginning balance, financial assets		2		36
Purchases, fair value measurement, assets		0		0
Sales, fair value measurement, assets		0		(17)
Issues, fair value measurement, assets		0		0
Settlements, fair value measurement, 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		(18)
Ending balance, financial assets		2		1
Financial assets at fair value through other comprehensive income [member] | Equity cash products [member] | Recurring fair value measurement [member] | Financial assets at fair value through profit or loss, category trading [member]
Financial assets [abstract]
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] | Financial assets at fair value through profit or loss, category other income [member]
Financial assets [abstract]
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]
Financial assets [abstract]
Beginning balance, financial assets				129
Purchases, fair value measurement, assets				0
Sales, fair value measurement, assets				(12)
Issues, fair value measurement, assets				0
Settlements, fair value measurement, assets				0
Transfers into Level 3 of fair value hierarchy, assets				0
Transfers out of Level 3 of fair value hierarchy, assets				(14)
Ending balance, financial assets				103
Financial assets at fair value through other comprehensive income [member] | Private equity investments [member] | Recurring fair value measurement [member] | Financial assets at fair value through profit or loss, category trading [member]
Financial assets [abstract]
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] | Financial assets at fair value through profit or loss, category other income [member]
Financial assets [abstract]
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]
Financial assets [abstract]
Beginning balance, financial assets				40
Purchases, fair value measurement, assets				0
Sales, fair value measurement, assets				(39)
Issues, fair value measurement, assets				0
Settlements, fair value measurement, 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				1
Financial assets at fair value through other comprehensive income [member] | Other [member] | Recurring fair value measurement [member] | Financial assets at fair value through profit or loss, category trading [member]
Financial assets [abstract]
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] | Financial assets at fair value through profit or loss, category other income [member]
Financial assets [abstract]
Total gains and losses in the period recognised in the income statement, assets				£ 0
[1]	Derivative financial instruments are represented on a net basis. On a gross basis, derivative financial assets were £ 5,701 m and derivative financial liabilities were £ 4,799 m.
[2]	Derivative financial instruments are presented on a net basis. On a gross basis, derivative financial assets were £ 5,066 m and derivative financial liabilities were £ 5,293 m.
[3]	Other includes commercial real estate loans, fund and fund-linked products, asset backed loans, physical commodities and investment property

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	Jun. 30, 2019	Dec. 31, 2018
Disclosure of detailed information about financial instruments [line items]
Derivative financial assets	£ 244,422	£ 222,683
Derivative financial liabilities	243,004	219,592
Significant unobservable inputs (Level 3) [member] | Recurring fair value measurement [member]
Disclosure of detailed information about financial instruments [line items]
Derivative financial assets	5,701	5,066
Derivative financial liabilities	£ 4,799	£ 5,293

Fair value of financial instr_7

Fair value of financial instruments - Unrealised gains and losses recognised in the period on Level 3 assets and liabilities held at period end (Details) - GBP (£) £ in Millions	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Disclosure of detailed information about financial instruments [line items]
Trading income	£ 2,093	£ 2,319
Other income	42	77
Significant unobservable inputs (Level 3) [member]
Disclosure of detailed information about financial instruments [line items]
Trading income	316	(133)
Other income	177	116
Total unrealised gains and losses recognised during the period on Level 3 assets and liabilities held at period end	493	(17)
Significant unobservable inputs (Level 3) [member] | Investment properties [member]
Disclosure of detailed information about financial instruments [line items]
Trading income	0	0
Other income	(1)	0
Total unrealised gains and losses recognised during the period on Level 3 assets and liabilities held at period end	(1)	0
Significant unobservable inputs (Level 3) [member] | Net derivative financial instruments [member]
Disclosure of detailed information about financial instruments [line items]
Trading income	212	(155)
Other income	0	0
Total unrealised gains and losses recognised during the period on Level 3 assets and liabilities held at period end	212	(155)
Trading portfolio liabilities [member] | Significant unobservable inputs (Level 3) [member]
Disclosure of detailed information about financial instruments [line items]
Trading income	2	0
Other income	0	0
Total unrealised gains and losses recognised during the period on Level 3 assets and liabilities held at period end	2	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	6	18
Other income	0	0
Total unrealised gains and losses recognised during the period on Level 3 assets and liabilities held at period end	6	18
Trading portfolio assets [member] | Significant unobservable inputs (Level 3) [member]
Disclosure of detailed information about financial instruments [line items]
Trading income	21	(3)
Other income	0	0
Total unrealised gains and losses recognised during the period on Level 3 assets and liabilities held at period end	21	(3)
Financial assets at fair value through income statement [member] | Significant unobservable inputs (Level 3) [member]
Disclosure of detailed information about financial instruments [line items]
Trading income	75	7
Other income	178	116
Total unrealised gains and losses recognised during the period on Level 3 assets and liabilities held at period end	£ 253	£ 123

Fair value of financial instr_8

Fair value of financial instruments - Sensitivity analysis of valuations using unobservable inputs (Details) - Recurring fair value measurement [member] - Significant unobservable inputs (Level 3) [member] - GBP (£) £ in Millions		Jun. 30, 2019	Dec. 31, 2018
Favourable changes [member]
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions		£ 584	£ (598)
Favourable changes [member] | Income statement [member]
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions		584	598
Unfavourable changes [member]
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions		(753)	737
Unfavourable changes [member] | Income statement [member]
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions		(753)	(737)
Corporate debt [member] | Favourable changes [member] | Income statement [member]
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions		12	10
Corporate debt [member] | Unfavourable changes [member] | Income statement [member]
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions		(10)	(2)
Non-asset backed loans [member] | Favourable changes [member] | Income statement [member]
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions		138	141
Non-asset backed loans [member] | Unfavourable changes [member] | Income statement [member]
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions		(241)	(210)
Equity cash products [member] | Favourable changes [member] | Income statement [member]
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions		130	121
Equity cash products [member] | Unfavourable changes [member] | Income statement [member]
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions		(173)	(155)
Private equity investments [member] | Favourable changes [member] | Income statement [member]
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions		6	0
Private equity investments [member] | Unfavourable changes [member] | Income statement [member]
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions		(7)	(10)
Other [member] | Favourable changes [member] | Income statement [member]
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions	[1]	2	2
Other [member] | Unfavourable changes [member] | Income statement [member]
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions	[1]	(2)	(2)
Interest rate derivatives [member] | Favourable changes [member] | Derivatives [member] | Income statement [member]
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions		52	80
Interest rate derivatives [member] | Unfavourable changes [member] | Derivatives [member] | Income statement [member]
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions		(118)	(162)
Foreign exchange derivatives [member] | Favourable changes [member] | Derivatives [member] | Income statement [member]
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions		11	7
Foreign exchange derivatives [member] | Unfavourable changes [member] | Derivatives [member] | Income statement [member]
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions		(14)	(10)
Credit derivatives [member] | Favourable changes [member] | Derivatives [member] | Income statement [member]
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions		125	126
Credit derivatives [member] | Unfavourable changes [member] | Derivatives [member] | Income statement [member]
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions		(79)	(73)
Equity derivatives [member] | Favourable changes [member] | Derivatives [member] | Income statement [member]
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions		107	110
Equity derivatives [member] | Unfavourable changes [member] | Derivatives [member] | Income statement [member]
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions		(108)	(112)
Commodity derivatives [member] | Favourable changes [member] | Derivatives [member] | Income statement [member]
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions		1	1
Commodity derivatives [member] | Unfavourable changes [member] | Derivatives [member] | Income statement [member]
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions		£ (1)	£ (1)
[1]	Other includes commercial real estate loans, fund and fund-linked products, asset backed loans, physical commodities and investment property

Fair value of financial instr_9

Fair value of financial instruments - Fair value adjustments (Details) - GBP (£) £ in Millions	Jun. 30, 2019	Dec. 31, 2018
Exit price adjustments derived from market bid-offer spreads [member]
Disclosure of detailed information about financial instruments [line items]
Fair value adjustments	£ (448)	£ (451)
Uncollateralised derivative funding [member]
Disclosure of detailed information about financial instruments [line items]
Fair value adjustments	(60)	(47)
Derivative credit valuation adjustments [member]
Disclosure of detailed information about financial instruments [line items]
Fair value adjustments	(149)	(125)
Derivative debit valuation adjustments [member]
Disclosure of detailed information about financial instruments [line items]
Fair value adjustments	£ 192	£ 237

Fair value of financial inst_10

Fair value of financial instruments - Comparison of carrying amounts and fair values for assets and liabilities not held at fair value (Details) - GBP (£) £ in Millions	Jun. 30, 2019		Dec. 31, 2018		Dec. 31, 2017
Financial assets [abstract]
Loans and advances at amortised cost	£ 144,664		£ 136,959
Reverse repurchase agreements and other similar secured lending	7,865		1,613
Financial liabilities [abstract]
Repurchase agreements and other similar secured borrowing	(5,992)		(7,378)
Debt securities in issue	(42,251)		(39,063)
Subordinated liabilities	(36,368)	[1]	(35,327)	[1]	£ (24,193)
Fair value [member]
Financial assets [abstract]
Reverse repurchase agreements and other similar secured lending	7,865		1,613
Financial liabilities [abstract]
Repurchase agreements and other similar secured borrowing	(5,992)		(7,378)
Debt securities in issue	(42,247)		(39,083)
Subordinated liabilities	(36,905)		(36,174)
Fair value [member] | Financial liabilities at amortised cost, class [member]
Financial liabilities [abstract]
Banks	(19,579)		(15,569)
Current and demand accounts	(78,961)		(77,264)
Savings accounts	(27,008)		(26,980)
Other time deposits	(89,569)		(79,524)
Fair value [member] | Financial assets at amortised cost [member] | Home loans [member]
Financial assets [abstract]
Loans and advances at amortised cost	12,242		12,592
Fair value [member] | Financial assets at amortised cost [member] | Credit cards, unsecured and other retail lending [member]
Financial assets [abstract]
Loans and advances at amortised cost	34,951		33,115
Fair value [member] | Financial assets at amortised cost [member] | Finance lease receivables [member]
Financial assets [abstract]
Loans and advances at amortised cost	2,178		2,057
Fair value [member] | Financial assets at amortised cost [member] | Corporate loans [member]
Financial assets [abstract]
Loans and advances at amortised cost	95,053		89,671
Gross carrying amount [member]
Financial assets [abstract]
Reverse repurchase agreements and other similar secured lending	7,865		1,613
Financial liabilities [abstract]
Repurchase agreements and other similar secured borrowing	(5,992)		(7,378)
Debt securities in issue	(42,251)		(39,063)
Subordinated liabilities	(36,368)		(35,327)
Gross carrying amount [member] | Financial liabilities at amortised cost, class [member]
Financial liabilities [abstract]
Banks	(19,579)		(15,569)
Current and demand accounts	(78,961)		(77,264)
Savings accounts	(27,008)		(26,980)
Other time deposits	(89,577)		(79,524)
Gross carrying amount [member] | Financial assets at amortised cost [member] | Home loans [member]
Financial assets [abstract]
Loans and advances at amortised cost	12,818		13,160
Gross carrying amount [member] | Financial assets at amortised cost [member] | Credit cards, unsecured and other retail lending [member]
Financial assets [abstract]
Loans and advances at amortised cost	34,035		31,921
Gross carrying amount [member] | Financial assets at amortised cost [member] | Finance lease receivables [member]
Financial assets [abstract]
Loans and advances at amortised cost	2,035		1,886
Gross carrying amount [member] | Financial assets at amortised cost [member] | Corporate loans [member]
Financial assets [abstract]
Loans and advances at amortised cost	£ 95,776		£ 89,992
[1]	For notes to the Financial Statements see pages 19 to 44

Fair value of financial inst_11

Fair value of financial instruments (Narrative) (Details) - GBP (£)	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Disclosure of detailed information about financial instruments [line items]
Deposits at amortised cost	£ 215,125,000,000	£ 199,337,000,000
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 Bank Group are insured up to $250,000 per depositor by the Federal Deposit Insurance Corporation (FDIC) in the United States. The FDIC is funded by premiums that the Barclays Bank Group and other banks pay for deposit insurance coverage.
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	£ 4,452,000,000	4,797,000,000
Significant unobservable inputs (Level 3) [member] | Recurring fair value measurement [member] | Favourable changes [member]
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions	(584,000,000)	598,000,000
Significant unobservable inputs (Level 3) [member] | Recurring fair value measurement [member] | Unfavourable changes [member]
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis valuation due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions	753,000,000	(737,000,000)
Exit price adjustments derived from market bid-offer spreads [member]
Disclosure of detailed information about financial instruments [line items]
Fair value adjustments	(448,000,000)	(451,000,000)
Uncollateralised derivative funding [member]
Disclosure of detailed information about financial instruments [line items]
Increase (decrease) in fair value adjustments of derivatives	(13,000,000)
Fair value adjustments	(60,000,000)	(47,000,000)
Derivative credit valuation adjustments [member]
Disclosure of detailed information about financial instruments [line items]
Increase (decrease) in fair value adjustments of derivatives	(24,000,000)
Fair value adjustments	(149,000,000)	(125,000,000)
Derivative debit valuation adjustments [member]
Disclosure of detailed information about financial instruments [line items]
Increase (decrease) in fair value adjustments of derivatives	45,000,000
Fair value adjustments	192,000,000	237,000,000
Financial instruments at fair value, category [member] | Significant unobservable inputs (Level 3) [member] | Recurring fair value measurement [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	106,000,000	127,000,000
Additions, aggregate difference between fair value at initial recognition and transaction price yet to be recognised in profit or loss	23,000,000	65,000,000
Amortisation and releases, aggregate difference between fair value at initial recognition and transaction price yet to be recognised in profit or loss	44,000,000	18,000,000
Increase (decrease) in aggregate difference between fair value at initial recognition and transaction price yet to be recognised in profit or loss	(21,000,000)	32,000,000
Financial instruments at fair value, category [member] | Significant unobservable inputs (Level 3) [member] | UK Banking Businesses [member] | Barclays Bank UK PLC [member] | Recurring fair value measurement [member]
Disclosure of detailed information about financial instruments [line items]
Increase (decrease) in aggregate difference between fair value at initial recognition and transaction price yet to be recognised in profit or loss	0	15,000,000
Financial instruments at amortised cost, category [member] | Significant unobservable inputs (Level 3) [member] | Recurring fair value measurement [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	32,000,000	31,000,000
Additions, aggregate difference between fair value at initial recognition and transaction price yet to be recognised in profit or loss	1,000,000	2,000,000
Amortisation and releases, aggregate difference between fair value at initial recognition and transaction price yet to be recognised in profit or loss	0	2,000,000
Increase (decrease) in aggregate difference between fair value at initial recognition and transaction price yet to be recognised in profit or loss	1,000,000	222,000,000
Financial instruments at amortised cost, category [member] | Significant unobservable inputs (Level 3) [member] | UK Banking Businesses [member] | Barclays Bank UK PLC [member] | Recurring fair value measurement [member]
Disclosure of detailed information about financial instruments [line items]
Increase (decrease) in aggregate difference between fair value at initial recognition and transaction price yet to be recognised in profit or loss	£ 0	£ 222,000,000

Subordinated liabilities (Detai

Subordinated liabilities (Details) - GBP (£) £ in Millions		6 Months Ended		12 Months Ended
		Jun. 30, 2019		Dec. 31, 2018
Subordinated liabilities [abstract]
Opening balance as at 1 January		£ 35,327	[1]	£ 24,193
Issuances		4,508		221
Redemptions		(4,321)		(3,246)
Other		854		14,159
Closing balance	[1]	£ 36,368		£ 35,327
[1]	For notes to the Financial Statements see pages 19 to 44

Subordinated liabilities (Narra

Subordinated liabilities (Narrative) (Details) ¥ in Millions, £ in Millions, $ in Millions	6 Months Ended		12 Months Ended
	Jun. 30, 2019GBP (£)Redemptions	Jun. 30, 2019USD ($)Redemptions	Dec. 31, 2018GBP (£)	Jun. 30, 2019JPY (¥)
Disclosure of detailed information about borrowings [line items]
Issuances	£ 4,508		£ 221
Redemption of subordinated debt	4,321		£ 3,246
Barclays Securities Japan Limited [member]
Disclosure of detailed information about borrowings [line items]
Redemption of subordinated debt	£ 14
Notional amount | ¥				¥ 1,000
Number of redemptions | Redemptions	2	2
Barclays Bank PLC loans issued intra-group Barclays PLC [member] | Barclays PLC [member]
Disclosure of detailed information about borrowings [line items]
Issuances	£ 3,396
5.088% Callable Tier 2 Notes [member] | Barclays PLC [member]
Disclosure of detailed information about borrowings [line items]
Issuances	1,035	$ 1,300
Borrowings, interest rate				5.088%
4.375% Fixed Rate Subordinated Notes [member] | Fixed interest rate [member]
Disclosure of detailed information about borrowings [line items]
Redemption of subordinated debt	1,230
Borrowings, interest rate				4.375%
USD Floating Rate Notes [member] | Floating interest rate [member] | Barclays Bank PLC externally issued [member]
Disclosure of detailed information about borrowings [line items]
Issuances	77
14% Step-up Callable Perpetual Reserve Capital Instruments [member] | Fixed interest rate [member] | Barclays Bank PLC externally issued [member]
Disclosure of detailed information about borrowings [line items]
Redemption of subordinated debt	£ 3,000
Borrowings, interest rate				14.00%

Provisions - Total Provisions (

Provisions - Total Provisions (Details) - GBP (£) £ in Millions	Jun. 30, 2019	Dec. 31, 2018
Disclosure of provisions [line items]
Provisions	£ 854	£ 1,127
Customer redress [member]
Disclosure of provisions [line items]
Provisions	104	127
Legal, competition and regulatory matters [member]
Disclosure of provisions [line items]
Provisions	224	411
Redundancy and restructuring [member]
Disclosure of provisions [line items]
Provisions	71	68
Undrawn contractually committed facilities and guarantees [member]
Disclosure of provisions [line items]
Provisions	236	217
Onerous contracts [member]
Disclosure of provisions [line items]
Provisions	18	90
Sundry provisions [member]
Disclosure of provisions [line items]
Provisions	£ 201	£ 214

Retirement benefits (Narrative)

Retirement benefits (Narrative) (Details) - GBP (£) £ in Billions	Jun. 30, 2019	Dec. 31, 2018	Sep. 30, 2018	Sep. 30, 2016
Disclosure of fair value of plan assets [line items]
Surplus (deficit) in plan	£ 1.6	£ 1.5
United Kingdom Retirement Fund (UKRF) [member]
Disclosure of fair value of plan assets [line items]
Surplus (deficit) in plan	£ 1.8	£ 1.7
United Kingdom Retirement Fund (UKRF) [member] | Deficit contributions 30 September 2018 valuation [member]
Disclosure of fair value of plan assets [line items]
Surplus (deficit) in plan			£ 4
Funding level percentage			88.40%
United Kingdom Retirement Fund (UKRF) [member] | Deficit contributions 30 September 2016 valuation [member]
Disclosure of fair value of plan assets [line items]
Surplus (deficit) in plan				£ 7.9
Funding level percentage				81.50%

Retirement benefits - UKRF fund

Retirement benefits - UKRF funding valuations (Narrative) (Details) - United Kingdom Retirement Fund (UKRF) [member] - Deficit contributions 30 September 2016 valuation [member] £ in Billions	6 Months Ended
	Jun. 30, 2019GBP (£)
2018 [member]
Disclosure of fair value of plan assets [line items]
Deficit reduction contributions	£ 0.5
2019 [member]
Disclosure of fair value of plan assets [line items]
Deficit reduction contributions	0.5
2020 [member]
Disclosure of fair value of plan assets [line items]
Deficit reduction contributions	0.5
2021 [member]
Disclosure of fair value of plan assets [line items]
Deficit reduction contributions	1
2022 [member]
Disclosure of fair value of plan assets [line items]
Deficit reduction contributions	1
2023 [member]
Disclosure of fair value of plan assets [line items]
Deficit reduction contributions	1
2024 [member]
Disclosure of fair value of plan assets [line items]
Deficit reduction contributions	1
2025 [member]
Disclosure of fair value of plan assets [line items]
Deficit reduction contributions	1
2026 [member]
Disclosure of fair value of plan assets [line items]
Deficit reduction contributions	£ 1

Called up share capital (Narrat

Called up share capital (Narrative) (Details) £ / shares in Units, £ in Millions	6 Months Ended
	Jun. 30, 2019GBP (£)£ / sharesshares	Jun. 30, 2019€ / shares	Jun. 30, 2019$ / shares	Dec. 31, 2018GBP (£)shares
Ordinary share capital [member]
Par value per share | £ / shares	£ 1
Number of shares issued	2,342,000,000			2,342,000,000
Increase (decrease) in number of shares outstanding	0
Preference share capital [member]
Called up share capital | £	£ 6			£ 6
Increase (decrease) in number of shares outstanding	0
Sterling 1 Preference Shares [member]
Par value per share | £ / shares	£ 1
Number of shares issued	1,000			1,000
Euro Preference Shares [member]
Par value per share | € / shares		€ 100
Number of shares issued	31,856			31,856
US Dollar Preference Shares $100 [member]
Par value per share | $ / shares			$ 100
Number of shares issued	58,133			58,133

Other equity instruments (Narra

Other equity instruments (Narrative) (Details) £ in Millions, $ in Billions		6 Months Ended
		Jun. 30, 2019GBP (£)Issuance	Jun. 30, 2019USD ($)	Dec. 31, 2018GBP (£)	Jun. 30, 2018GBP (£)	Dec. 31, 2017GBP (£)
Equity		£ 52,610		£ 47,711	£ 48,192	£ 65,734
Other equity instruments [member]
Equity	[1]	£ 9,402		£ 7,595	£ 6,912	£ 8,982
Issuances of AT1 equity instruments [member]
Number of convertible instruments issued | Issuance		2
8% Fixed Rate Resetting Perpetual Subordinated Contingent Convertible Securities [member]
Equity | $			$ 2
Interest rate		8.00%	8.00%
7.125% Fixed Rate Resetting Perpetual Subordinated Contingent Convertible Securities [member]
Equity		£ 300
Interest rate		7.125%	7.125%
[1]	Details of share capital, other equity instruments and other reserves are shown on pages 33 to 34

Other reserves (Details)

Other reserves (Details) - GBP (£) £ in Millions		Jun. 30, 2019	Dec. 31, 2018
Disclosure of reserves within equity [line items]
Total Reserves	[1]	£ 4,608	£ 3,361
Currency translation reserve [member]
Disclosure of reserves within equity [line items]
Total Reserves		4,159	3,927
Fair value through other comprehensive income reserve [member]
Disclosure of reserves within equity [line items]
Total Reserves		61	(298)
Cash flow hedging reserve [member]
Disclosure of reserves within equity [line items]
Total Reserves		489	(123)
Own credit reserve [member]
Disclosure of reserves within equity [line items]
Total Reserves		(77)	(121)
Other reserves [member]
Disclosure of reserves within equity [line items]
Total Reserves		£ (24)	£ (24)
[1]	For notes to the Financial Statements see pages 19 to 44

Other reserves (Narrative) (Det

Other reserves (Narrative) (Details) - GBP (£) £ in Millions		6 Months Ended
		Jun. 30, 2019	Dec. 31, 2018
Disclosure of reserves within equity [line items]
Other reserves	[1]	£ 4,608	£ 3,361
Currency translation reserve [member]
Disclosure of reserves within equity [line items]
Other reserves		4,159	3,927
Movements		232
Fair value through other comprehensive income reserve [member]
Disclosure of reserves within equity [line items]
Other reserves		61	(298)
Movements		359
Changes in fair value		679
Net gains transferred to net profits		200
Tax		120
Cash flow hedging reserve [member]
Disclosure of reserves within equity [line items]
Other reserves		489	(123)
Movements		612
Changes in fair value		844
Net gains transferred to net profits		31
Tax		204
Own credit reserve [member]
Disclosure of reserves within equity [line items]
Other reserves		(77)	(121)
Movements		44
Funding spreads		68
Tax		24
Other reserves [member]
Disclosure of reserves within equity [line items]
Other reserves		£ (24)	£ (24)
[1]	For notes to the Financial Statements see pages 19 to 44

Contingent liabilities and co_3

Contingent liabilities and commitments (Details) - GBP (£) £ in Millions	Jun. 30, 2019	Dec. 31, 2018
Financial guarantee contracts [member]
Disclosure of contingent liabilities [line items]
Notional amount	£ 21,877	£ 19,394
Loan commitments [member]
Disclosure of contingent liabilities [line items]
Notional amount	271,465	257,768
Guarantees and letters of credit pledged as collateral security [member] | Financial guarantee contracts [member]
Disclosure of contingent liabilities [line items]
Notional amount	16,106	15,046
Performance guarantees, acceptances and endorsements [member] | Financial guarantee contracts [member]
Disclosure of contingent liabilities [line items]
Notional amount	5,771	4,348
Documentary credits and other short-term trade related transactions [Member] | Loan commitments [member]
Disclosure of contingent liabilities [line items]
Notional amount	1,273	1,741
Standby facilities, credit lines and other commitments [member] | Loan commitments [member]
Disclosure of contingent liabilities [line items]
Notional amount	£ 270,192	£ 256,027

Legal, competition and regula_2

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

1 Months Ended

3 Months Ended

6 Months Ended

12 Months Ended

48 Months Ended

Mar. 31, 2018GBP (£)

Nov. 30, 2017GBP (£)

Jan. 31, 2017GBP (£)

Feb. 28, 2016GBP (£)

Sep. 30, 2013GBP (£)

Oct. 31, 2008GBP (£)

Dec. 31, 2017GBP (£)

Jun. 30, 2019GBP (£)

Jun. 30, 2019USD ($)

Jun. 30, 2018GBP (£)

Dec. 31, 2015GBP (£)lawsuits

Dec. 31, 2012GBP (£)

Dec. 31, 2008GBP (£)

Dec. 31, 2008GBP (£)

Nov. 30, 2008GBP (£)

Disclosure of contingent liabilities [line items]

Losses on litigation settlements

£ 68

£ 1,627

Investigations into certain advisory services agreements and other matters and civil action [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 UK Serious Fraud Office (SFO), the Financial Conduct Authority (FCA), the US Department of Justice (DoJ) and the US Securities and Exchange Commission (SEC) have been conducting investigations into two advisory services agreements entered into by Barclays Bank PLC. These agreements were entered into with Qatar Holding LLC in June and October 2008 (the Agreements). The FCA commenced an investigation into whether the Agreements may have related to Barclays PLC’s capital raisings in June and November 2008 (the Capital Raisings). The existence of the June 2008 advisory services agreement was disclosed, but the entry into the advisory services agreement in October 2008 and the fees payable under the Agreements, which amounted to a total of £322m payable over a period of five years, were not disclosed in the announcements or public documents relating to the Capital Raisings. The SFO also commenced an investigation into the Agreements and into a $3bn loan (the Loan) provided by Barclays Bank PLC in November 2008 to the State of Qatar. In May 2018, the Crown Court dismissed all charges against Barclays PLC and Barclays Bank PLC brought by the SFO, and in October 2018, the High Court denied the SFO’s application to reinstate the charges, which were consequently dismissed.

The UK Serious Fraud Office (SFO), the Financial Conduct Authority (FCA), the US Department of Justice (DoJ) and the US Securities and Exchange Commission (SEC) have been conducting investigations into two advisory services agreements entered into by Barclays Bank PLC. These agreements were entered into with Qatar Holding LLC in June and October 2008 (the Agreements). The FCA commenced an investigation into whether the Agreements may have related to Barclays PLC’s capital raisings in June and November 2008 (the Capital Raisings). The existence of the June 2008 advisory services agreement was disclosed, but the entry into the advisory services agreement in October 2008 and the fees payable under the Agreements, which amounted to a total of £322m payable over a period of five years, were not disclosed in the announcements or public documents relating to the Capital Raisings. The SFO also commenced an investigation into the Agreements and into a $3bn loan (the Loan) provided by Barclays Bank PLC in November 2008 to the State of Qatar. In May 2018, the Crown Court dismissed all charges against Barclays PLC and Barclays Bank PLC brought by the SFO, and in October 2018, the High Court denied the SFO’s application to reinstate the charges, which were consequently dismissed.

Service agreement fees payable

£ 322

Advisory service fees payable, term

5 years

Loans to government

£ 3,000

Information about contingent liabilities that disclosure is not practicable

It is not currently practicable to provide an estimate of the financial impact of the actions described on Barclays or what effect they might have upon Barclays’ operating results, cash flows or financial position in any particular period. The financial penalty provided in the FCA’s Notices and the amount of PCP’s claim do not necessarily reflect Barclays’ potential financial exposure in respect of these matters.

It is not currently practicable to provide an estimate of the financial impact of the actions described on Barclays or what effect they might have upon Barclays’ operating results, cash flows or financial position in any particular period. The financial penalty provided in the FCA’s Notices and the amount of PCP’s claim do not necessarily reflect Barclays’ potential financial exposure in respect of these matters.

FCA Proceedings and other investigations [Member]

Disclosure of contingent liabilities [line items]

Loss contingency, Financial penalty warning

£ 50

Civil action [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 2016, PCP Capital Partners LLP and PCP International Finance Limited (PCP) served a claim on Barclays Bank PLC seeking damages for fraudulent misrepresentation and deceit, arising from alleged statements made by Barclays Bank PLC to PCP in relation to the terms on which securities were to be issued to potential investors, allegedly including PCP, in the November 2008 capital raising. PCP seeks damages of approximately £1.6bn (plus interest from November 2017) and costs. Barclays Bank PLC is defending the claim and trial is scheduled to commence in June 2020.

In 2016, PCP Capital Partners LLP and PCP International Finance Limited (PCP) served a claim on Barclays Bank PLC seeking damages for fraudulent misrepresentation and deceit, arising from alleged statements made by Barclays Bank PLC to PCP in relation to the terms on which securities were to be issued to potential investors, allegedly including PCP, in the November 2008 capital raising. PCP seeks damages of approximately £1.6bn (plus interest from November 2017) and costs. Barclays Bank PLC is defending the claim and trial is scheduled to commence in June 2020.

Loss Contingency, Damages Sought, claimed amounts, Value

£ 1,600

Investigations into LIBOR and other benchmarks [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 2012, the DoJ and SEC commenced investigations in relation to whether certain relationships with third parties who assist Barclays PLC to win or retain business are compliant with the US Foreign Corrupt Practices Act. Various regulators in other jurisdictions are also being briefed on the investigations. Separately, Barclays has been cooperating with the DoJ and SEC in relation to an investigation into certain of its hiring practices in Asia and elsewhere and is keeping certain regulators in other jurisdictions informed. Barclays is in advanced discussions to resolve this matter.

In 2012, the DoJ and SEC commenced investigations in relation to whether certain relationships with third parties who assist Barclays PLC to win or retain business are compliant with the US Foreign Corrupt Practices Act. Various regulators in other jurisdictions are also being briefed on the investigations. Separately, Barclays has been cooperating with the DoJ and SEC in relation to an investigation into certain of its hiring practices in Asia and elsewhere and is keeping certain regulators in other jurisdictions informed. Barclays is in advanced discussions to resolve this matter.

Information about contingent liabilities that disclosure is not practicable

It is not currently practicable to provide an estimate of the financial impact of the actions described on Barclays or what effect they might have upon Barclays’ operating results, cash flows or financial position in any particular period.

It is not currently practicable to provide an estimate of the financial impact of the actions described on Barclays or what effect they might have upon Barclays’ operating results, cash flows or financial position in any particular period.

USD LIBOR Cases in MDL Court [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 before a single judge 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 before a single judge in the US District Court in the Southern District of New York (SDNY).

Information about contingent liabilities that disclosure is not practicable

Aside from the settlements discussed above, it is not currently practicable to provide an estimate of any further financial impact of the actions described on Barclays or what effect they might have upon Barclays’ operating results, cash flows or financial position in any particular period.

Aside from the settlements discussed above, it is not currently practicable to provide an estimate of any further financial impact of the actions described on Barclays or what effect they might have upon Barclays’ operating results, cash flows or financial position in any particular period.

Number of lawsuits with specified damages sought | lawsuits

5

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

Disclosure of contingent liabilities [line items]

Loss Contingency, Damages Sought, claimed amounts, Value

£ 1,250

USD LIBOR Cases in MDL Court [Member] | Exchange-Based Class claims [Member]

Disclosure of contingent liabilities [line items]

Losses on litigation settlements

£ 20

USD LIBOR Cases in MDL Court [Member] | OTC Class claims [Member]

Disclosure of contingent liabilities [line items]

Losses on litigation settlements

120

USD LIBOR Cases in MDL Court [Member] | Debt Securities Class claims [Member]

Disclosure of contingent liabilities [line items]

Losses on litigation settlements

7.1

USD LIBOR Cases in MDL Court [Member] | Issued loans linked to USD LIBOR [Member]

Disclosure of contingent liabilities [line items]

Losses on litigation settlements

£ 4

Foreign Exchange investigations [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 Barclays reached settlements with the CFTC, the DoJ, the NYDFS, the Board of Governors of the Federal Reserve System (Federal Reserve) and the FCA (together, the 2015 Resolving Authorities) in relation to investigations into certain sales and trading practices in the Foreign Exchange market. In connection with these settlements, Barclays paid total penalties of approximately $2.38bn and agreed to undertake certain remedial actions. Under the plea agreement with the DoJ, which was approved by the US District Court for the District of Connecticut in January 2017, Barclays PLC agreed to a term of probation of three years. Barclays also continues to provide relevant information to certain of the 2015 Resolving Authorities.

In 2015 Barclays reached settlements with the CFTC, the DoJ, the NYDFS, the Board of Governors of the Federal Reserve System (Federal Reserve) and the FCA (together, the 2015 Resolving Authorities) in relation to investigations into certain sales and trading practices in the Foreign Exchange market. In connection with these settlements, Barclays paid total penalties of approximately $2.38bn and agreed to undertake certain remedial actions. Under the plea agreement with the DoJ, which was approved by the US District Court for the District of Connecticut in January 2017, Barclays PLC agreed to a term of probation of three years. Barclays also continues to provide relevant information to certain of the 2015 Resolving Authorities.

Information about contingent liabilities that disclosure is not practicable

Aside from the settlements described above, Barclays does not expect the financial impact of the matters described above to be material to the Group’s operating results, cash flows or financial position.

Aside from the settlements described above, Barclays does not expect the financial impact of the matters described above to be material to the Group’s operating results, cash flows or financial position.

Losses on litigation settlements

£ 2,380

Number of years probation

3 years

Provisions recognised

£ 240

Foreign Exchange investigations [Member] | Fines settlement [Member]

Disclosure of contingent liabilities [line items]

Losses on litigation settlements

£ 210

Foreign Exchange investigations [Member] | Violation of NPA [Member]

Disclosure of contingent liabilities [line items]

Losses on litigation settlements

£ 27

Foreign Exchange investigations [Member] | Disgorgement and restitution settlement [member]

Disclosure of contingent liabilities [line items]

Litigation settlements approved, value

£ 12.9

Civil actions in respect of Foreign Exchange [Member]

Disclosure of contingent liabilities [line items]

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

Following settlement of certain investigations referred to above in ‘Foreign Exchange Investigations’ a number of individuals and corporates in a range of jurisdictions have threatened or brought civil actions against Barclays and other banks in relation to Foreign Exchange or may do so in the future. Certain of these cases have been dismissed, settled or settled subject to final approval from the relevant court (and in the case of class actions, the right of class members to opt out of the settlement and to seek to file their own claims).

Following settlement of certain investigations referred to above in ‘Foreign Exchange Investigations’ a number of individuals and corporates in a range of jurisdictions have threatened or brought civil actions against Barclays and other banks in relation to Foreign Exchange or may do so in the future. Certain of these cases have been dismissed, settled or settled subject to final approval from the relevant court (and in the case of class actions, the right of class members to opt out of the settlement and to seek to file their own claims).

Information about contingent liabilities that disclosure is not practicable

Aside from the settlements described above, Barclays does not expect the financial impact of the matters described above to be material to the Group’s operating results, cash flows or financial position.

Aside from the settlements described above, Barclays does not expect the financial impact of the matters described above to be material to the Group’s operating results, cash flows or financial position.

Consolidated FX Action [Member] | Barclays Capital Inc [Member]

Disclosure of contingent liabilities [line items]

Losses on litigation settlements

£ 384

US residential and commercial mortgage-related activity and litigation [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 various pending civil actions relating to US Residential Mortgage-Backed Securities (RMBS). Barclays was the sole provider of various loan-level representations and warranties (R&Ws) with respect to approximately $5bn of Barclays sponsored securitisations. In addition, an entity that Barclays acquired in 2007 (Acquired Subsidiary) provided R&Ws on $19.4bn of loans it sold to third parties. There are no stated expiration provisions applicable to most R&Ws made by Barclays or the Acquired Subsidiary. Under certain circumstances, Barclays and/or the Acquired Subsidiary may be required to repurchase the related loans or make other payments related to such loans if the R&Ws are breached.

There are various pending civil actions relating to US Residential Mortgage-Backed Securities (RMBS). Barclays was the sole provider of various loan-level representations and warranties (R&Ws) with respect to approximately $5bn of Barclays sponsored securitisations. In addition, an entity that Barclays acquired in 2007 (Acquired Subsidiary) provided R&Ws on $19.4bn of loans it sold to third parties. There are no stated expiration provisions applicable to most R&Ws made by Barclays or the Acquired Subsidiary. Under certain circumstances, Barclays and/or the Acquired Subsidiary may be required to repurchase the related loans or make other payments related to such loans if the R&Ws are breached.

Information about contingent liabilities that disclosure is not practicable

It is not currently practicable to provide an estimate of any further financial impact of the actions described on Barclays or what effect they might have upon Barclays’ operating results, cash flows or financial position in any particular period.

It is not currently practicable to provide an estimate of any further financial impact of the actions described on Barclays or what effect they might have upon Barclays’ operating results, cash flows or financial position in any particular period.

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

Disclosure of contingent liabilities [line items]

Revenue

£ 19,400

Original unpaid principal balance at time of sale

£ 2,100

US residential and commercial mortgage-related activity and litigation [Member] | Sponsored securitisations [Member] | RMBS Repurchase Requests [Member]

Disclosure of contingent liabilities [line items]

Revenue

£ 5,000

Alternative trading systems and high-frequency trading [Member] | Barclays Capital Inc [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 2014, the New York State Attorney General (NYAG) filed a complaint (NYAG Complaint) against Barclays PLC and BCI in the Supreme Court of the State of New York alleging, amongst other things, that Barclays PLC and BCI engaged in fraud and deceptive practices in connection with LX, Barclays’ SEC-registered alternative trading system (ATS). In February 2016, Barclays reached settlement agreements with the SEC and NYAG, which required Barclays to pay $35m to each. Following the filing of the NYAG Complaint, Barclays PLC and BCI were also named in a putative shareholder securities class action. The parties have agreed to a settlement of this action for $27m, which has received final court approval.

In 2014, the New York State Attorney General (NYAG) filed a complaint (NYAG Complaint) against Barclays PLC and BCI in the Supreme Court of the State of New York alleging, amongst other things, that Barclays PLC and BCI engaged in fraud and deceptive practices in connection with LX, Barclays’ SEC-registered alternative trading system (ATS). In February 2016, Barclays reached settlement agreements with the SEC and NYAG, which required Barclays to pay $35m to each. Following the filing of the NYAG Complaint, Barclays PLC and BCI were also named in a putative shareholder securities class action. The parties have agreed to a settlement of this action for $27m, which has received final court approval.

Information about contingent liabilities that disclosure is not practicable

Aside from the settlements described above, there is no financial impact on Barclays’ operating results, cash flows or financial position.

Aside from the settlements described above, there is no financial impact on Barclays’ operating results, cash flows or financial position.

Alternative trading systems and high-frequency trading [Member] | Securities and Exchange Commission [Member]

Disclosure of contingent liabilities [line items]

Losses on litigation settlements | $

$ 27

Alternative trading systems and high-frequency trading [Member] | Securities and Exchange Commission [Member] | Barclays Capital Inc [Member]

Disclosure of contingent liabilities [line items]

Losses on litigation settlements

£ 35

Alternative trading systems and high-frequency trading [Member] | New York Attorney General [Member]

Disclosure of contingent liabilities [line items]

Losses on litigation settlements | $

$ 27

Alternative trading systems and high-frequency trading [Member] | New York Attorney General [Member] | Barclays Capital Inc [Member]

Disclosure of contingent liabilities [line items]

Losses on litigation settlements

£ 35

Civil actions in respect of the US Anti-Terrorism Act [Member]

Disclosure of contingent liabilities [line items]

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

Civil complaints against Barclays Bank PLC and other banks allege engagement in a conspiracy and violation of the US Anti-Terrorism Act (ATA). These include various civil complaints filed in the US Federal Courts in the EDNY and SDNY by separate groups of plaintiffs (aggregating over 4,000) alleging that Barclays Bank PLC and a number of other banks engaged in a conspiracy and violated the ATA by facilitating US dollar denominated transactions for the Government of Iran and various Iranian banks, which in turn funded acts of terrorism that injured or killed the plaintiffs’ family members. The plaintiffs seek to recover for pain, suffering and mental anguish pursuant to the provisions of the ATA, which allows for the tripling of any proven damages and attorneys' fees. In respect of a motion by defendants to dismiss one of the complaints, in July 2018, a magistrate judge (to whom the court referred the motion) issued a recommendation that the motion be denied; the defendants objected to that recommendation; and the motion is pending before the court. In respect of another complaint, the defendants’ motion to dismiss was granted in March 2019, but the plaintiffs have moved to file an amended complaint.

Civil complaints against Barclays Bank PLC and other banks allege engagement in a conspiracy and violation of the US Anti-Terrorism Act (ATA). These include various civil complaints filed in the US Federal Courts in the EDNY and SDNY by separate groups of plaintiffs (aggregating over 4,000) alleging that Barclays Bank PLC and a number of other banks engaged in a conspiracy and violated the ATA by facilitating US dollar denominated transactions for the Government of Iran and various Iranian banks, which in turn funded acts of terrorism that injured or killed the plaintiffs’ family members. The plaintiffs seek to recover for pain, suffering and mental anguish pursuant to the provisions of the ATA, which allows for the tripling of any proven damages and attorneys' fees. In respect of a motion by defendants to dismiss one of the complaints, in July 2018, a magistrate judge (to whom the court referred the motion) issued a recommendation that the motion be denied; the defendants objected to that recommendation; and the motion is pending before the court. In respect of another complaint, the defendants’ motion to dismiss was granted in March 2019, but the plaintiffs have moved to file an amended complaint.

Information about contingent liabilities that disclosure is not practicable

It is not currently practicable to provide an estimate of the financial impact of the actions described on Barclays or what effect they might have upon Barclays’ operating results, cash flows or financial position in any particular period.

It is not currently practicable to provide an estimate of the financial impact of the actions described on Barclays or what effect they might have upon Barclays’ operating results, cash flows or financial position in any particular period.

Portuguese Competition Authority investigation [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 Portuguese Competition Authority is investigating whether competition law was infringed by the exchange of information about retail credit products amongst 15 banks in Portugal, including Barclays, over a period of 11 years with particular reference to mortgages, consumer lending and lending to small and medium enterprises. Barclays is cooperating with the investigation.

The Portuguese Competition Authority is investigating whether competition law was infringed by the exchange of information about retail credit products amongst 15 banks in Portugal, including Barclays, over a period of 11 years with particular reference to mortgages, consumer lending and lending to small and medium enterprises. Barclays is cooperating with the investigation.

Information about contingent liabilities that disclosure is not practicable

It is not currently practicable to provide an estimate of the financial impact of the action described on Barclays or what effect they might have upon Barclays’ operating results, cash flows or financial position in any particular period.

It is not currently practicable to provide an estimate of the financial impact of the action described on Barclays or what effect they might have upon Barclays’ operating results, cash flows or financial position in any particular period.

Period under investigation of competition law infringment

11 years

11 years

BDC Finance LLC [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 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) when it failed to transfer approximately $40m of alleged excess collateral in response to BDC’s 2008 demand (Demand).

In 2008, BDC Finance L.L.C. (BDC) filed a complaint in the NY Supreme Court 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) when it failed to transfer approximately $40m of alleged excess collateral in response to BDC’s 2008 demand (Demand).

Information about contingent liabilities that disclosure is not practicable

It is not currently practicable to provide an estimate of the financial impact of the actions described on Barclays or what effect they might have upon Barclays’ operating results, cash flows or financial position in any particular period. BDC has made claims against Barclays totalling $298m plus attorneys’ fees, expenses, and pre-judgement interest. This amount does not necessarily reflect Barclays’ potential financial exposure if a ruling were to be made against it.

It is not currently practicable to provide an estimate of the financial impact of the actions described on Barclays or what effect they might have upon Barclays’ operating results, cash flows or financial position in any particular period. BDC has made claims against Barclays totalling $298m plus attorneys’ fees, expenses, and pre-judgement interest. This amount does not necessarily reflect Barclays’ potential financial exposure if a ruling were to be made against it.

Alleged excess collateral in response to demand

£ 40

Litigation settlements approved, value

£ 298

HM Revenue & Customs (HMRC) assessments concerning UK Value Added Tax [Member] | Barclays 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 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

£ 53

Information about contingent liabilities that disclosure is not practicable

The total amount of the HMRC assessments is approximately £181m, inclusive of interest.

The total amount of the HMRC assessments is approximately £181m, inclusive of interest.

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

Disclosure of contingent liabilities [line items]

Loss Contingency, Damages Sought, claimed amounts, Value

£ 128

Related party transactions - Am

Related party transactions - Amounts included in the Barclays Bank Group's financial statements with other Barclays Group companies (Details) - GBP (£) £ in Millions		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Disclosure of transactions between related parties [line items]
Income	[1]	£ 7,122	£ 7,253
Operating expenses		(4,910)	(6,384)
Assets		969,266		£ 877,700
Liabilities		916,656		829,989
Parent [member]
Disclosure of transactions between related parties [line items]
Income		(275)	(77)
Operating expenses		(46)	(72)
Assets		1,707		727
Liabilities		26,315		21,405
Subsidiaries [member]
Disclosure of transactions between related parties [line items]
Income		32	1
Operating expenses		(1,546)	£ (2,045)
Assets		2,332		1,091
Liabilities		£ 1,272		£ 2,058
[1]	The geographic region is based on counterparty location

Related party transactions (Nar

Related party transactions (Narrative) (Details) - Barclays PLC [member]	6 Months Ended
	Jun. 30, 2019
Disclosure of transactions between related parties [line items]
Name of ultimate parent of group	Barclays PLC
Ordinary shares [member]
Disclosure of transactions between related parties [line items]
Percentage of issued share capital	100.00%

Barclays Bank PLC parent cond_3

Barclays Bank PLC parent condensed balance sheet (Details) - GBP (£) £ in Millions		Jun. 30, 2019		Dec. 31, 2018		Jun. 30, 2018	Dec. 31, 2017
Assets
Cash and balances at central banks		£ 123,629		£ 136,359
Cash collateral and settlement balances		101,323		74,352
Loans and advances at amortised cost		144,664		136,959
Reverse repurchase agreements and other similar secured lending		7,865		1,613
Trading portfolio assets		120,025		104,038
Financial assets at fair value through the income statement		156,243		145,250
Derivative financial instruments		244,422		222,683
Financial assets at fair value through other comprehensive income		55,856		44,994
Investments in associates and joint ventures		732		762
Goodwill and intangible assets		1,282		1,327
Property, plant and equipment		1,628	[1]	947
Current tax assets	[2]	2,041		1,713
Deferred tax assets	[2]	2,677		2,970
Retirement benefit assets	[2]	1,875		1,768
Other assets		5,004		1,965
Total assets		969,266		877,700
Liabilities
Deposits at amortised cost		215,125		199,337
Cash collateral and settlement balances		93,723		67,736
Repurchase agreements and other similar secured borrowing		5,992		7,378
Debt securities in issue		42,251		39,063
Subordinated liabilities		36,368	[2]	35,327	[2]		£ 24,193
Trading portfolio liabilities		41,335		36,614
Financial liabilities designated at fair value		229,875		217,741
Derivative financial instruments		243,004		219,592
Current tax liabilities	[2]	613		621
Deferred tax liabilities	[2]	332		0
Retirement benefit liabilities	[2]	287		283
Other liabilities		6,897	[1]	5,170
Provisions		854		1,127
Total liabilities		916,656		829,989
Equity
Called up share capital and share premium	[2]	2,348		2,348
Other equity instruments	[2]	9,402		7,595
Other reserves	[2]	4,608		3,361
Retained earnings		36,252		34,405
Total equity		52,610		47,711		£ 48,192	£ 65,734
Total liabilities and equity		969,266		877,700
Barclays Bank PLC [member]
Assets
Cash and balances at central banks		104,789		126,002
Cash collateral and settlement balances		87,509		66,196
Loans and advances at amortised cost		159,466		156,764
Reverse repurchase agreements and other similar secured lending		12,108		5,766
Trading portfolio assets		89,066		73,480
Financial assets at fair value through the income statement		180,560		179,365
Derivative financial instruments		243,388		221,247
Financial assets at fair value through other comprehensive income		54,659		43,706
Investments in associates and joint ventures		138		140
Investments in subsidiaries		16,310		14,958
Goodwill and intangible assets		117		123
Property, plant and equipment	[3]	445		103
Current tax assets		1,782		1,439
Deferred tax assets		1,080		1,249
Retirement benefit assets		1,850		1,748
Other assets		4,087		1,110
Total assets		957,354		893,396
Liabilities
Deposits at amortised cost		240,920		231,017
Cash collateral and settlement balances		77,817		56,358
Repurchase agreements and other similar secured borrowing		10,031		11,113
Debt securities in issue		28,384		26,391
Subordinated liabilities		36,137		35,085
Trading portfolio liabilities		50,940		46,626
Financial liabilities designated at fair value		220,597		216,966
Derivative financial instruments		238,992		221,590
Current tax liabilities		379		376
Deferred tax liabilities		332		0
Retirement benefit liabilities		115		124
Other liabilities	[3]	4,723		3,295
Provisions		610		818
Total liabilities		909,977		849,759
Equity
Called up share capital and share premium		2,348		2,348
Other equity instruments		31,383		30,545
Other reserves		12,168		10,361
Retained earnings		1,478		383
Total equity		47,377		43,637
Total liabilities and equity		£ 957,354		£ 893,396
[1]	Barclays Bank PLC adopted the accounting standard IFRS 16 on 1 January 2019. The impact on adoption was an increase in property, plant and equipment of £ 0.5 bn, an increase in liabilities of £ 0.5 bn, with no material impact on re tained earnings
[2]	For notes to the Financial Statements see pages 19 to 44
[3]	Barclays adopted the accounting standard IFRS 16 on 1 January 2019. The impact on adoption was an increase in property, plant and equipment of £ 0.3 bn, an increase in liabilities of £ 0.3 bn, with no material impact on retained earnings

Barclays Bank PLC parent cond_4

Barclays Bank PLC parent condensed balance sheet (Narrative) (Details) - GBP (£) £ in Millions		3 Months Ended	6 Months Ended
		Mar. 31, 2019	Jun. 30, 2019		Dec. 31, 2018
Condensed Balance Sheet Statements, Captions [Line Items]
Other liabilities			£ 6,897	[1]	£ 5,170
Property, plant and equipment			1,628	[1]	947
Loans and advances at amortised cost			144,664		136,959
Deposits at amortised cost			215,125		199,337
Reverse repurchase agreements and cash collateral on securities borrowed			7,865		1,613
Financial liabilities designated at fair value			229,875		217,741
Barclays Bank PLC [member]
Condensed Balance Sheet Statements, Captions [Line Items]
Other liabilities	[2]		4,723		3,295
Property, plant and equipment	[2]		445		103
Loans and advances at amortised cost			159,466		156,764
Deposits at amortised cost			240,920		231,017
Reverse repurchase agreements and cash collateral on securities borrowed			12,108		5,766
Financial liabilities designated at fair value			£ 220,597		216,966
Barclays Bank PLC [member] | Barclays Bank Ireland PLC [member] | Disposal of European Branch operations [member]
Condensed Balance Sheet Statements, Captions [Line Items]
Description of effects of changes in parent's ownership interest in subsidiary			Following a decision to move all European Branch operations to Barclays Bank Ireland PLC, Barclays Bank PLC transferred its businesses in France, Italy, Netherlands, Portugal, Spain and Sweden in Q1 2019. There was no impact on the consolidated financial statements of the Barclays Bank PLC Group.
Loans and advances at amortised cost		£ 7,043
Deposits at amortised cost		3,455
Reverse repurchase agreements and cash collateral on securities borrowed		2,827
Net Assets transferred		181
Consideration received		99.4
Increased investment in subsidiary		181
Financial liabilities designated at fair value		£ 3,780
IFRS 16 - Leases [member] | Increase (decrease) due to changes in accounting policy [member]
Condensed Balance Sheet Statements, Captions [Line Items]
Other liabilities					500
Property, plant and equipment					500
IFRS 16 - Leases [member] | Increase (decrease) due to changes in accounting policy [member] | Barclays Bank PLC [member]
Condensed Balance Sheet Statements, Captions [Line Items]
Other liabilities					300
Property, plant and equipment					£ 300
[1]	Barclays Bank PLC adopted the accounting standard IFRS 16 on 1 January 2019. The impact on adoption was an increase in property, plant and equipment of £ 0.5 bn, an increase in liabilities of £ 0.5 bn, with no material impact on re tained earnings
[2]	Barclays adopted the accounting standard IFRS 16 on 1 January 2019. The impact on adoption was an increase in property, plant and equipment of £ 0.3 bn, an increase in liabilities of £ 0.3 bn, with no material impact on retained earnings

Other disclosures - Credit Ri_3

Other disclosures - Credit Risk - Loans and advances at amortised cost by product (Details) - Financial assets at amortised cost [member] £ in Millions	Jun. 30, 2019GBP (£)	Dec. 31, 2018GBP (£)
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	£ 144,664	£ 136,959
Coverage ratio	0.025	0.027
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	£ 148,395	£ 140,802
Loans and advances [member] | Impairment allowance [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	3,731	3,843
Loans and advances [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	£ 128,642	£ 122,100
Coverage ratio	0.004	0.004
Loans and advances [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	£ 129,141	£ 122,589
Loans and advances [member] | Stage 1 [member] | Impairment allowance [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	499	489
Loans and advances [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	£ 13,771	£ 12,769
Coverage ratio	0.074	0.089
Loans and advances [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Not past due [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 588	£ 11,587
Coverage ratio	0.065	0.075
Loans and advances [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Equal to or Less than 30 days past due [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 49	£ 532
Coverage ratio	0.14	0.206
Loans and advances [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Greater than 30 days past due [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 82	£ 650
Coverage ratio	0.115	0.217
Loans and advances [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	£ 14,878	£ 14,024
Loans and advances [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Gross exposure [member] | Not past due [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	12,536	12,524
Loans and advances [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Gross exposure [member] | Equal to or Less than 30 days past due [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	960	670
Loans and advances [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Gross exposure [member] | Greater than 30 days past due [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	1,382	830
Loans and advances [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Impairment allowance [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	1,107	1,255
Loans and advances [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Impairment allowance [member] | Not past due [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	814	937
Loans and advances [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Impairment allowance [member] | Equal to or Less than 30 days past due [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	138
Loans and advances [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Impairment allowance [member] | Greater than 30 days past due [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	180
Loans and advances [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]
Financial assets	£ 2,251	£ 2,090
Coverage ratio	0.486	0.501
Loans and advances [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [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	£ 4,376	£ 4,189
Loans and advances [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Impairment allowance [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	2,125	2,099
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	£ 12,818	£ 13,160
Coverage ratio	0.03	0.028
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	£ 13,211	£ 13,540
Home loans [member] | Impairment allowance [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	393	380
Home loans [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	£ 11,234	£ 11,460
Coverage ratio	0.002	0.002
Home loans [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	£ 11,262	£ 11,486
Home loans [member] | Stage 1 [member] | Impairment allowance [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	26
Home loans [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	£ 719	£ 813
Coverage ratio	0.061	0.055
Home loans [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Not past due [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 3,664	£ 634
Coverage ratio	0.042	0.044
Home loans [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Equal to or Less than 30 days past due [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 200	£ 41
Coverage ratio	0.183	0.18
Home loans [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Greater than 30 days past due [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 147	£ 138
Coverage ratio	0.109	0.061
Home loans [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	£ 766	£ 860
Home loans [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Gross exposure [member] | Not past due [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	614	663
Home loans [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Gross exposure [member] | Equal to or Less than 30 days past due [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	60	50
Home loans [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Gross exposure [member] | Greater than 30 days past due [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	92	147
Home loans [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Impairment allowance [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	47
Home loans [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Impairment allowance [member] | Not past due [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	26	29
Home loans [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Impairment allowance [member] | Equal to or Less than 30 days past due [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	9
Home loans [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Impairment allowance [member] | Greater than 30 days past due [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	9
Home loans [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]
Financial assets	£ 865	£ 887
Coverage ratio	0.269	0.257
Home loans [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [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	£ 1,183	£ 1,194
Home loans [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Impairment allowance [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	318	307
Credit cards, unsecured 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	£ 36,049	£ 33,791
Coverage ratio	0.067	0.076
Credit cards, unsecured 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	£ 38,632	£ 36,552
Credit cards, unsecured and other retail lending [member] | Impairment allowance [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	2,583	2,761
Credit cards, unsecured and other retail lending [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	£ 31,404	£ 29,192
Coverage ratio	0.011	0.012
Credit cards, unsecured and other retail lending [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	£ 31,753	£ 29,548
Credit cards, unsecured and other retail lending [member] | Stage 1 [member] | Impairment allowance [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	349	356
Credit cards, unsecured and other retail lending [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	£ 4,011	£ 3,954
Coverage ratio	0.168	0.197
Credit cards, unsecured and other retail lending [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Not past due [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 7,470	£ 3,687
Coverage ratio	0.133	0.158
Credit cards, unsecured and other retail lending [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Equal to or Less than 30 days past due [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 577	£ 187
Coverage ratio	0.344	0.387
Credit cards, unsecured and other retail lending [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Greater than 30 days past due [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 994	£ 80
Coverage ratio	0.493	0.667
Credit cards, unsecured and other retail lending [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	£ 4,822	£ 4,926
Credit cards, unsecured and other retail lending [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Gross exposure [member] | Not past due [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	4,227	4,381
Credit cards, unsecured and other retail lending [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Gross exposure [member] | Equal to or Less than 30 days past due [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	305	305
Credit cards, unsecured and other retail lending [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Gross exposure [member] | Greater than 30 days past due [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	240
Credit cards, unsecured and other retail lending [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Impairment allowance [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	811	972
Credit cards, unsecured and other retail lending [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Impairment allowance [member] | Not past due [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	563	694
Credit cards, unsecured and other retail lending [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Impairment allowance [member] | Equal to or Less than 30 days past due [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	105	118
Credit cards, unsecured and other retail lending [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Impairment allowance [member] | Greater than 30 days past due [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	143	160
Credit cards, unsecured and other retail lending [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]
Financial assets	£ 634	£ 645
Coverage ratio	0.692	0.69
Credit cards, unsecured and other retail lending [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [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	£ 2,057	£ 2,078
Credit cards, unsecured and other retail lending [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Impairment allowance [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	1,423	1,433
Corporate 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	£ 95,797	£ 90,008
Coverage ratio	0.008	0.008
Corporate 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	£ 96,552	£ 90,710
Corporate loans [member] | Impairment allowance [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	755	702
Corporate loans [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	£ 86,004	£ 81,448
Coverage ratio	0.001	0.001
Corporate loans [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	£ 86,126	£ 81,555
Corporate loans [member] | Stage 1 [member] | Impairment allowance [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	122	107
Corporate loans [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	£ 9,041	£ 8,002
Coverage ratio	0.027	0.029
Corporate loans [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Not past due [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 11,722	£ 7,266
Coverage ratio	0.029	0.029
Corporate loans [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Equal to or Less than 30 days past due [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 826	£ 304
Coverage ratio	0.03	0.035
Corporate loans [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Greater than 30 days past due [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 1,223	£ 432
Coverage ratio	0.006	0.025
Corporate loans [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	£ 9,290	£ 8,238
Corporate loans [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Gross exposure [member] | Not past due [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	7,695	7,480
Corporate loans [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Gross exposure [member] | Equal to or Less than 30 days past due [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	595	315
Corporate loans [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Gross exposure [member] | Greater than 30 days past due [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	1,000	443
Corporate loans [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Impairment allowance [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	249	236
Corporate loans [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Impairment allowance [member] | Not past due [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	225	214
Corporate loans [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Impairment allowance [member] | Equal to or Less than 30 days past due [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	18	11
Corporate loans [member] | Lifetime expected credit losses [member] | Stage 2 [member] | Impairment allowance [member] | Greater than 30 days past due [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	11
Corporate loans [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]
Financial assets	£ 752	£ 558
Coverage ratio	0.338	0.391
Corporate loans [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [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	£ 1,136	£ 917
Corporate loans [member] | Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Impairment allowance [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	£ 384	£ 359

Other disclosures - Credit Ri_4

Other disclosures - Credit Risk - Loans and advances at amortised cost by product (Narrative) (Details) - GBP (£)	Jun. 30, 2019	Dec. 31, 2018
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]
Exposure to credit risk on loan commitments and financial guarantee contracts	£ 277,903,000,000	£ 265,455,000,000
Off balance sheet loan commitments and financial guarantee contracts [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]
Exposure to credit risk on loan commitments and financial guarantee contracts	262,596,000,000	248,590,000,000
Off balance sheet loan commitments and financial guarantee contracts [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]
Exposure to credit risk on loan commitments and financial guarantee contracts	15,029,000,000	16,444,000,000
Off balance sheet loan commitments and financial guarantee contracts [member] | Gross exposure [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]
Exposure to credit risk on loan commitments and financial guarantee contracts	278,000,000	421,000,000
Off balance sheet loan commitments and financial guarantee contracts [member] | Impairment allowance [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	236,000,000	217,000,000
Off balance sheet loan commitments and financial guarantee contracts [member] | Impairment allowance [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]
Exposure to credit risk on loan commitments and financial guarantee contracts	93,000,000	91,000,000
Off balance sheet loan commitments and financial guarantee contracts [member] | Impairment allowance [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]
Exposure to credit risk on loan commitments and financial guarantee contracts	111,000,000	104,000,000
Off balance sheet loan commitments and financial guarantee contracts [member] | Impairment allowance [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]
Exposure to credit risk on loan commitments and financial guarantee contracts	32,000,000	22,000,000
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	159,900,000,000	120,100,000,000
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	159,400,000,000	119,600,000,000
Other financial assets subject to impairment [member] | Gross exposure [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]
Financial assets	5,000,000	0
Other financial assets subject to impairment [member] | Impairment allowance [member]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets	21,000,000	11,000,000
Other financial assets subject to impairment [member] | Impairment allowance [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	13,000,000	9,000,000
Other financial assets subject to impairment [member] | Impairment allowance [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]
Financial assets	5,000,000	0
Financial assets at fair value through other comprehensive income, category [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	500,000,000	500,000,000
Financial assets at fair value through other comprehensive income, category [member] | Impairment allowance [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	£ 3,000,000	£ 2,000,000

Other disclosures - Credit Ri_5

Other disclosures - Credit Risk - Movement in gross exposure for loans and advances at amortised cost (Details) - Financial assets at amortised cost [member] - Gross exposure [member] - Loans and advances [member] - GBP (£) £ in Millions	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Loans and advances at amortised cost
Opening balance	£ 140,802
Business activity in the year	33,345
Net drawdowns and repayments	(1,067)
Final repayments	(24,037)
Disposals	(21)
Write-offs	(627)	£ (788)
Ending balance	148,395
Transfers from Stage 1 [member]
Loans and advances at amortised cost
Net transfers between stages	0
Transfers from Stage 2 [member]
Loans and advances at amortised cost
Net transfers between stages	0
Transfers from Stage 3 [member]
Loans and advances at amortised cost
Net transfers between stages	0
Stage 1 [member]
Loans and advances at amortised cost
Opening balance	122,589
Business activity in the year	32,336
Net drawdowns and repayments	(2,880)
Final repayments	(21,819)
Disposals	0
Write-offs	0
Ending balance	129,141
Stage 1 [member] | Transfers from Stage 1 [member]
Loans and advances at amortised cost
Net transfers between stages	(4,661)
Stage 1 [member] | Transfers from Stage 2 [member]
Loans and advances at amortised cost
Net transfers between stages	3,540
Stage 1 [member] | Transfers from Stage 3 [member]
Loans and advances at amortised cost
Net transfers between stages	36
Lifetime expected credit losses [member] | Stage 2 [member]
Loans and advances at amortised cost
Opening balance	14,024
Business activity in the year	984
Net drawdowns and repayments	1,482
Final repayments	(1,803)
Disposals	0
Write-offs	0
Ending balance	14,878
Lifetime expected credit losses [member] | Stage 2 [member] | Transfers from Stage 1 [member]
Loans and advances at amortised cost
Net transfers between stages	4,348
Lifetime expected credit losses [member] | Stage 2 [member] | Transfers from Stage 2 [member]
Loans and advances at amortised cost
Net transfers between stages	(4,255)
Lifetime expected credit losses [member] | Stage 2 [member] | Transfers from Stage 3 [member]
Loans and advances at amortised cost
Net transfers between stages	98
Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Loans and advances at amortised cost
Opening balance	4,189
Business activity in the year	25
Net drawdowns and repayments	331
Final repayments	(415)
Disposals	(21)
Write-offs	(627)
Ending balance	4,376
Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Transfers from Stage 1 [member]
Loans and advances at amortised cost
Net transfers between stages	313
Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Transfers from Stage 2 [member]
Loans and advances at amortised cost
Net transfers between stages	715
Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Transfers from Stage 3 [member]
Loans and advances at amortised cost
Net transfers between stages	£ (134)

Other disclosures - Credit Ri_6

Other disclosures - Credit Risk - Movement in impairment allowance on loans and advances at amortised cost (Details) - GBP (£)		6 Months Ended
		Jun. 30, 2019		Jun. 30, 2018
Reconciliation of ECL movement to impairment (charge)/release for the period, Loans and advances at amortised cost
Credit impairment charges and other provisions		£ 510,000,000		£ 156,000,000
Gross exposure [member] | Other financial assets subject to impairment [member]
Loans and advances at amortised cost
Opening balance		120,100,000,000
Ending balance		159,900,000,000
Impairment allowance [member]
Reconciliation of ECL movement to impairment (charge)/release for the period, Loans and advances at amortised cost
Credit impairment charges and other provisions		510,000,000
Impairment allowance [member] | Loan commitments and financial guarantee contracts [member]
Reconciliation of ECL movement to impairment (charge)/release for the period, Loans and advances at amortised cost
Credit impairment charges and other provisions		22,000,000
Impairment allowance [member] | Other financial assets subject to impairment [member]
Loans and advances at amortised cost
Opening balance		11,000,000
Ending balance		21,000,000
Reconciliation of ECL movement to impairment (charge)/release for the period, Loans and advances at amortised cost
Credit impairment charges and other provisions	[1]	6,000,000
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
Decrease through write-off after applying recoveries, financial assets		580,000,000		745,000,000
Financial assets at amortised cost [member] | Gross exposure [member] | Loans and advances [member]
Loans and advances at amortised cost
Opening balance		140,802,000,000
Business activity in the year		33,345,000,000
Final repayments		(24,037,000,000)
Disposals		(21,000,000)
Write-offs		(627,000,000)		(788,000,000)
Ending balance		148,395,000,000
Financial assets at amortised cost [member] | Gross exposure [member] | Loans and advances [member] | Transfers from Stage 1 [member]
Loans and advances at amortised cost
Net transfers between stages		0
Financial assets at amortised cost [member] | Gross exposure [member] | Loans and advances [member] | Transfers from Stage 2 [member]
Loans and advances at amortised cost
Net transfers between stages		0
Financial assets at amortised cost [member] | Gross exposure [member] | Loans and advances [member] | Transfers from Stage 3 [member]
Loans and advances at amortised cost
Net transfers between stages		0
Financial assets at amortised cost [member] | Impairment allowance [member] | Loans and advances [member]
Loans and advances at amortised cost
Opening balance		3,843,000,000
Business activity in the year		139,000,000
Net re-measurement and movement due to exposure and risk parameter changes		521,000,000
Final repayments		(124,000,000)
Disposals		(21,000,000)
Write-offs	[2]	(627,000,000)
Ending balance	[1]	3,731,000,000
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-offs		536,000,000
Post write-off recoveries		47,000,000	[2]	£ 43,000,000
Exchange and other adjustments		(7,000,000)
Financial assets at amortised cost [member] | Impairment allowance [member] | Loans and advances [member] | Transfers from Stage 1 [member]
Loans and advances at amortised cost
Net transfers between stages		0
Financial assets at amortised cost [member] | Impairment allowance [member] | Loans and advances [member] | Transfers from Stage 2 [member]
Loans and advances at amortised cost
Net transfers between stages		0
Financial assets at amortised cost [member] | Impairment allowance [member] | Loans and advances [member] | Transfers from Stage 3 [member]
Loans and advances at amortised cost
Net transfers between stages		0
Stage 1 [member] | Gross exposure [member] | Other financial assets subject to impairment [member]
Loans and advances at amortised cost
Opening balance		119,600,000,000
Ending balance		159,400,000,000
Stage 1 [member] | Impairment allowance [member] | Other financial assets subject to impairment [member]
Loans and advances at amortised cost
Opening balance		9,000,000
Ending balance		13,000,000
Stage 1 [member] | Financial assets at amortised cost [member] | Gross exposure [member] | Loans and advances [member]
Loans and advances at amortised cost
Opening balance		122,589,000,000
Business activity in the year		32,336,000,000
Final repayments		(21,819,000,000)
Disposals		0
Write-offs		0
Ending balance		129,141,000,000
Stage 1 [member] | Financial assets at amortised cost [member] | Gross exposure [member] | Loans and advances [member] | Transfers from Stage 1 [member]
Loans and advances at amortised cost
Net transfers between stages		(4,661,000,000)
Stage 1 [member] | Financial assets at amortised cost [member] | Gross exposure [member] | Loans and advances [member] | Transfers from Stage 2 [member]
Loans and advances at amortised cost
Net transfers between stages		3,540,000,000
Stage 1 [member] | Financial assets at amortised cost [member] | Gross exposure [member] | Loans and advances [member] | Transfers from Stage 3 [member]
Loans and advances at amortised cost
Net transfers between stages		36,000,000
Stage 1 [member] | Financial assets at amortised cost [member] | Impairment allowance [member] | Loans and advances [member]
Loans and advances at amortised cost
Opening balance		489,000,000
Business activity in the year		95,000,000
Net re-measurement and movement due to exposure and risk parameter changes		(243,000,000)
Final repayments		(31,000,000)
Disposals		0
Write-offs		0
Ending balance	[1]	499,000,000
Stage 1 [member] | Financial assets at amortised cost [member] | Impairment allowance [member] | Loans and advances [member] | Transfers from Stage 1 [member]
Loans and advances at amortised cost
Net transfers between stages		(58,000,000)
Stage 1 [member] | Financial assets at amortised cost [member] | Impairment allowance [member] | Loans and advances [member] | Transfers from Stage 2 [member]
Loans and advances at amortised cost
Net transfers between stages		246,000,000
Stage 1 [member] | Financial assets at amortised cost [member] | Impairment allowance [member] | Loans and advances [member] | Transfers from Stage 3 [member]
Loans and advances at amortised cost
Net transfers between stages		1,000,000
Lifetime expected credit losses [member] | Stage 2 [member] | Gross exposure [member] | Financial assets at fair value through other comprehensive income [member]
Loans and advances at amortised cost
Opening balance		500,000,000
Ending balance		500,000,000
Lifetime expected credit losses [member] | Stage 2 [member] | Impairment allowance [member] | Financial assets at fair value through other comprehensive income [member]
Loans and advances at amortised cost
Opening balance		2,000,000
Ending balance		3,000,000
Lifetime expected credit losses [member] | Stage 2 [member] | Financial assets at amortised cost [member] | Gross exposure [member] | Loans and advances [member]
Loans and advances at amortised cost
Opening balance		14,024,000,000
Business activity in the year		984,000,000
Final repayments		(1,803,000,000)
Disposals		0
Write-offs		0
Ending balance		14,878,000,000
Lifetime expected credit losses [member] | Stage 2 [member] | Financial assets at amortised cost [member] | Gross exposure [member] | Loans and advances [member] | Transfers from Stage 1 [member]
Loans and advances at amortised cost
Net transfers between stages		4,348,000,000
Lifetime expected credit losses [member] | Stage 2 [member] | Financial assets at amortised cost [member] | Gross exposure [member] | Loans and advances [member] | Transfers from Stage 2 [member]
Loans and advances at amortised cost
Net transfers between stages		(4,255,000,000)
Lifetime expected credit losses [member] | Stage 2 [member] | Financial assets at amortised cost [member] | Gross exposure [member] | Loans and advances [member] | Transfers from Stage 3 [member]
Loans and advances at amortised cost
Net transfers between stages		98,000,000
Lifetime expected credit losses [member] | Stage 2 [member] | Financial assets at amortised cost [member] | Impairment allowance [member] | Loans and advances [member]
Loans and advances at amortised cost
Opening balance		1,255,000,000
Business activity in the year		39,000,000
Net re-measurement and movement due to exposure and risk parameter changes		251,000,000
Final repayments		(40,000,000)
Disposals		0
Write-offs	[2]	0
Ending balance	[1]	1,107,000,000
Lifetime expected credit losses [member] | Stage 2 [member] | Financial assets at amortised cost [member] | Impairment allowance [member] | Loans and advances [member] | Transfers from Stage 1 [member]
Loans and advances at amortised cost
Net transfers between stages		51,000,000
Lifetime expected credit losses [member] | Stage 2 [member] | Financial assets at amortised cost [member] | Impairment allowance [member] | Loans and advances [member] | Transfers from Stage 2 [member]
Loans and advances at amortised cost
Net transfers between stages		(456,000,000)
Lifetime expected credit losses [member] | Stage 2 [member] | Financial assets at amortised cost [member] | Impairment allowance [member] | Loans and advances [member] | Transfers from Stage 3 [member]
Loans and advances at amortised cost
Net transfers between stages		7,000,000
Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Gross exposure [member] | Other financial assets subject to impairment [member]
Loans and advances at amortised cost
Opening balance		0
Ending balance		5,000,000
Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Impairment allowance [member] | Other financial assets subject to impairment [member]
Loans and advances at amortised cost
Opening balance		0
Ending balance		5,000,000
Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Financial assets at amortised cost [member] | Gross exposure [member] | Loans and advances [member]
Loans and advances at amortised cost
Opening balance		4,189,000,000
Business activity in the year		25,000,000
Final repayments		(415,000,000)
Disposals		(21,000,000)
Write-offs		(627,000,000)
Ending balance		4,376,000,000
Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Financial assets at amortised cost [member] | Gross exposure [member] | Loans and advances [member] | Transfers from Stage 1 [member]
Loans and advances at amortised cost
Net transfers between stages		313,000,000
Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Financial assets at amortised cost [member] | Gross exposure [member] | Loans and advances [member] | Transfers from Stage 2 [member]
Loans and advances at amortised cost
Net transfers between stages		715,000,000
Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Financial assets at amortised cost [member] | Gross exposure [member] | Loans and advances [member] | Transfers from Stage 3 [member]
Loans and advances at amortised cost
Net transfers between stages		(134,000,000)
Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Financial assets at amortised cost [member] | Impairment allowance [member] | Loans and advances [member]
Loans and advances at amortised cost
Opening balance		2,099,000,000
Business activity in the year		5,000,000
Net re-measurement and movement due to exposure and risk parameter changes		513,000,000
Final repayments		(53,000,000)
Disposals		(21,000,000)
Write-offs	[2]	(627,000,000)
Ending balance	[1]	2,125,000,000
Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Financial assets at amortised cost [member] | Impairment allowance [member] | Loans and advances [member] | Transfers from Stage 1 [member]
Loans and advances at amortised cost
Net transfers between stages		7,000,000
Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Financial assets at amortised cost [member] | Impairment allowance [member] | Loans and advances [member] | Transfers from Stage 2 [member]
Loans and advances at amortised cost
Net transfers between stages		210,000,000
Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member] | Financial assets at amortised cost [member] | Impairment allowance [member] | Loans and advances [member] | Transfers from Stage 3 [member]
Loans and advances at amortised cost
Net transfers between stages		£ (8,000,000)
[1]	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, accrued income and sundry debtors. These have a total gross exposure of £ 159.9 bn ( December 2018: £ 120.1 bn) and impairment allowance of £ 21 m ( December 2018: £ 11 m). This comprises £ 13 m ECL ( December 2018: £ 9 m) on £ 159.4 bn stage 1 assets ( December 2018: £ 119.6 bn) and £ 3 m ( December 2018: £ 2 m) on £ 0.5 bn stage 2 fa ir value through other comprehensive income assets ( December 2018: £ 0.5 bn) and £ 5 m ( December 2018: £ nil ) on £ 5 m Stage 3 other assets ( December 20 18: £ nil )
[2]	In H119 , gross write-offs amounted to £ 6 27 m ( H1 18: £ 788 m) and post write-off recoveries amounted to £ 47 m ( H1 18: £ 43 m). Net write-offs represent gross write-offs less post write-off recoveries and amounted to £ 5 80 m ( H1 18: £ 745 m)

Other disclosures - Credit Ri_7

Other disclosures - Credit Risk - Movement in gross exposure for loan commitment and financial guarantees (Details) - Gross exposure [member] - Loan commitments and financial guarantee contracts [member] £ in Millions	6 Months Ended
	Jun. 30, 2019GBP (£)
Loan commitments and financial guarantee contracts
Opening balance	£ 265,455
Net transfers between stages	0
Business activity in the year	45,590
Net drawdowns and repayments	(1,633)
Final repayments	(31,509)
Ending balance	277,903
Stage 1 [member]
Loan commitments and financial guarantee contracts
Opening balance	248,590
Net transfers between stages	(506)
Business activity in the year	44,043
Net drawdowns and repayments	(2,348)
Final repayments	(27,183)
Ending balance	262,596
Lifetime expected credit losses [member] | Stage 2 [member]
Loan commitments and financial guarantee contracts
Opening balance	16,444
Net transfers between stages	142
Business activity in the year	1,538
Net drawdowns and repayments	997
Final repayments	(4,092)
Ending balance	15,029
Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Loan commitments and financial guarantee contracts
Opening balance	421
Net transfers between stages	364
Business activity in the year	9
Net drawdowns and repayments	(282)
Final repayments	(234)
Ending balance	£ 278

Other disclosures - Credit Ri_8

Other disclosures - Credit Risk - Movement in provision on loan commitments and financial guarantees (Details) - Impairment allowance [member] - Loan commitments and financial guarantee contracts [member] £ in Millions	6 Months Ended
	Jun. 30, 2019GBP (£)
Loan commitments and financial guarantee contracts
Opening balance	£ 217
Net transfers between stages	0
Business activity in the year	58
Net re-measurement and movement due to exposure and risk parameter changes	3
Final repayments	(42)
Ending balance	236
Stage 1 [member]
Loan commitments and financial guarantee contracts
Opening balance	91
Net transfers between stages	8
Business activity in the year	26
Net re-measurement and movement due to exposure and risk parameter changes	(17)
Final repayments	(15)
Ending balance	93
Lifetime expected credit losses [member] | Stage 2 [member]
Loan commitments and financial guarantee contracts
Opening balance	104
Net transfers between stages	(6)
Business activity in the year	25
Net re-measurement and movement due to exposure and risk parameter changes	14
Final repayments	(26)
Ending balance	111
Lifetime expected credit losses [member] | Credit Impaired - Stage 3 [member]
Loan commitments and financial guarantee contracts
Opening balance	22
Net transfers between stages	(2)
Business activity in the year	7
Net re-measurement and movement due to exposure and risk parameter changes	6
Final repayments	(1)
Ending balance	£ 32

Uncategorized Items - c070-2019

Label	Element	Value
Amount of reclassifications or changes in presentation	ifrs-full_AmountOfReclassificationsOrChangesInPresentation	£ (2,150,000,000)
Total share capital and share premium [member]
Amount of reclassifications or changes in presentation	ifrs-full_AmountOfReclassificationsOrChangesInPresentation	0	[1]
Equity attributable to owners of parent [member]
Amount of reclassifications or changes in presentation	ifrs-full_AmountOfReclassificationsOrChangesInPresentation	(2,150,000,000)
Other reserves [member]
Amount of reclassifications or changes in presentation	ifrs-full_AmountOfReclassificationsOrChangesInPresentation	(136,000,000)	[1]
Other equity interest [member]
Amount of reclassifications or changes in presentation	ifrs-full_AmountOfReclassificationsOrChangesInPresentation	0	[1]
Non-controlling interests [member]
Amount of reclassifications or changes in presentation	ifrs-full_AmountOfReclassificationsOrChangesInPresentation	0	[2]
Retained earnings [member]
Amount of reclassifications or changes in presentation	ifrs-full_AmountOfReclassificationsOrChangesInPresentation	£ (2,014,000,000)
[1]	Details of share capital, other equity instruments and other reserves are shown on pages 33 to 34
[2]	Details of non-controlling interests are shown on page 23