FINANCIAL INSTRUMENTS (Details) - Schedule of Movements in Level 3 Portfolio - Level 3 of fair value hierarchy [member] - GBP (£) £ in Millions	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017
Financial assets at fair value through profit or loss, category [member]
FINANCIAL INSTRUMENTS (Details) - Schedule of Movements in Level 3 Portfolio [Line Items]
Beginning Balance	£ 14,152
Exchange and other adjustments	87
Gains recognised in the income statement within other income	439
Purchases/increases to customer loans	2,480
Sales	(3,593)
Transfers into the level 3 portfolio	815
Transfers out of the level 3 portfolio	(463)
Ending Balance	13,917	£ 14,152
Gains (losses) recognised in the income statement, within other income, relating to the change in fair value of those assets held at 31 December	(104)
Financial assets at fair value through profit or loss, category [member] \| Previously stated [member]
FINANCIAL INSTRUMENTS (Details) - Schedule of Movements in Level 3 Portfolio [Line Items]
Beginning Balance	3,686
Ending Balance		3,686
Financial assets at fair value through profit or loss, category [member] \| Increase (decrease) due to changes in accounting policy required by IFRSs [member]
FINANCIAL INSTRUMENTS (Details) - Schedule of Movements in Level 3 Portfolio [Line Items]
Beginning Balance	10,466
Ending Balance		10,466
Financial assets available-for-sale, category [member] \| Previously stated [member]
FINANCIAL INSTRUMENTS (Details) - Schedule of Movements in Level 3 Portfolio [Line Items]
Beginning Balance	696
Ending Balance		696
Financial assets available-for-sale, category [member] \| Increase (decrease) due to changes in accounting policy required by IFRSs [member]
FINANCIAL INSTRUMENTS (Details) - Schedule of Movements in Level 3 Portfolio [Line Items]
Beginning Balance	(696)
Ending Balance		(696)
Financial Assets, Excluding Derivatives [Member]
FINANCIAL INSTRUMENTS (Details) - Schedule of Movements in Level 3 Portfolio [Line Items]
Beginning Balance	14,454
Exchange and other adjustments	85
Gains recognised in the income statement within other income	439
(Losses) gains recognised in other comprehensive income within the revaluation reserve in respect of financial assets at fair value through other comprehensive income (2017: available-for-sale financial assets)	(4)
Purchases/increases to customer loans	2,482
Sales	(3,688)
Transfers into the level 3 portfolio	1,163
Transfers out of the level 3 portfolio	(747)
Ending Balance	14,184	14,454
Gains (losses) recognised in the income statement, within other income, relating to the change in fair value of those assets held at 31 December	(104)
Financial Assets, Excluding Derivatives [Member] \| Previously stated [member]
FINANCIAL INSTRUMENTS (Details) - Schedule of Movements in Level 3 Portfolio [Line Items]
Beginning Balance	4,382
Ending Balance		4,382
Financial Assets, Excluding Derivatives [Member] \| Increase (decrease) due to changes in accounting policy required by IFRSs [member]
FINANCIAL INSTRUMENTS (Details) - Schedule of Movements in Level 3 Portfolio [Line Items]
Beginning Balance	10,072
Ending Balance		10,072
Financial assets at fair value through other comprehensive income, category [member]
FINANCIAL INSTRUMENTS (Details) - Schedule of Movements in Level 3 Portfolio [Line Items]
Beginning Balance	302
Exchange and other adjustments	(2)
(Losses) gains recognised in other comprehensive income within the revaluation reserve in respect of financial assets at fair value through other comprehensive income (2017: available-for-sale financial assets)	(4)
Purchases/increases to customer loans	2
Sales	(95)
Transfers into the level 3 portfolio	348
Transfers out of the level 3 portfolio	(284)
Ending Balance	267	302
Financial assets at fair value through other comprehensive income, category [member] \| Increase (decrease) due to changes in accounting policy required by IFRSs [member]
FINANCIAL INSTRUMENTS (Details) - Schedule of Movements in Level 3 Portfolio [Line Items]
Beginning Balance	302
Ending Balance		302
Previously stated [member] \| Financial assets at fair value through profit or loss, category [member]
FINANCIAL INSTRUMENTS (Details) - Schedule of Movements in Level 3 Portfolio [Line Items]
Beginning Balance	3,686	3,806
Exchange and other adjustments		(1)
Gains recognised in the income statement within other income		202
Purchases/increases to customer loans		774
Sales		(1,005)
Transfers into the level 3 portfolio		152
Transfers out of the level 3 portfolio		(242)
Ending Balance		3,686
Gains (losses) recognised in the income statement, within other income, relating to the change in fair value of those assets held at 31 December		125
Previously stated [member] \| Financial assets available-for-sale, category [member]
FINANCIAL INSTRUMENTS (Details) - Schedule of Movements in Level 3 Portfolio [Line Items]
Beginning Balance	696	894
Exchange and other adjustments		(24)
(Losses) gains recognised in other comprehensive income within the revaluation reserve in respect of financial assets at fair value through other comprehensive income (2017: available-for-sale financial assets)		(117)
Purchases/increases to customer loans		41
Sales		(61)
Transfers into the level 3 portfolio		2
Transfers out of the level 3 portfolio		(39)
Ending Balance		696
Previously stated [member] \| Financial Assets, Excluding Derivatives [Member]
FINANCIAL INSTRUMENTS (Details) - Schedule of Movements in Level 3 Portfolio [Line Items]
Beginning Balance	£ 4,382	4,700
Exchange and other adjustments		(25)
Gains recognised in the income statement within other income		202
(Losses) gains recognised in other comprehensive income within the revaluation reserve in respect of financial assets at fair value through other comprehensive income (2017: available-for-sale financial assets)		(117)
Purchases/increases to customer loans		815
Sales		(1,066)
Transfers into the level 3 portfolio		154
Transfers out of the level 3 portfolio		(281)
Ending Balance		4,382
Gains (losses) recognised in the income statement, within other income, relating to the change in fair value of those assets held at 31 December		£ 125

The fair value gains (losses) recognised in other comprehensive income on financial assets reclassified out of the available-for-sale category. [Refer: Financial assets available-for-sale; Other comprehensive income]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Note Expiry date 2021-01-01
-Name IFRS
-Number 7
-IssueDate 2018-01-01
-Paragraph 12A
-Subparagraph d
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-02&anchor=para_12A_d&doctype=Standard&book=b
-URIDate 2018-03-16

+ Details

Name:	ifrs-full_FairValueGainsLossesOnFinancialAssetsReclassifiedOutOfAvailableforsaleFinancialAssetsRecognisedInOtherComprehensiveIncome
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The amount of assets that are: (a) cash; (b) an equity instrument of another entity; (c) a contractual right: (i) to receive cash or another financial asset from another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially favourable to the entity; or (d) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to receive a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose the entity’s own equity instruments do not include puttable financial instruments classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. [Refer: Financial instruments, class [member]; Financial liabilities]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2018-01-01
-Paragraph 25
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2018-03-01&anchor=para_25&doctype=Standard
-URIDate 2018-03-16

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2018-01-01
-Paragraph 35H
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2018-03-01&anchor=para_35H&doctype=Standard
-URIDate 2018-03-16

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2018-01-01
-Paragraph 35I
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2018-03-01&anchor=para_35I&doctype=Standard
-URIDate 2018-03-16

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2018-01-01
-Paragraph 35M
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2018-03-01&anchor=para_35M&doctype=Standard
-URIDate 2018-03-16

Reference 5: http://www.xbrl.org/2003/role/exampleRef
-Name IFRS
-Number 7
-IssueDate 2018-01-01
-Paragraph 35N
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2018-03-01&anchor=para_35N&doctype=Standard
-URIDate 2018-03-16

+ Details

Name:	ifrs-full_FinancialAssets
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The gains (losses) recognised in profit or loss on the fair value measurement of assets. [Refer: At fair value [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 13
-IssueDate 2018-01-01
-Paragraph 93
-Subparagraph e
-Clause i
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=13&date=2018-03-01&anchor=para_93_e_i&doctype=Standard
-URIDate 2018-03-16

+ Details

Name:	ifrs-full_GainsLossesRecognisedInProfitOrLossFairValueMeasurementAssets
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

- Definition

The increase (decrease) in financial assets resulting from foreign exchange and other movements. [Refer: Financial assets]

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IFRS
-Number 7
-IssueDate 2018-01-01
-Paragraph IG20B
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2018-03-01&anchor=para_IG20B&doctype=Implementation%20Guidance
-URIDate 2018-03-16

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Name IFRS
-Number 7
-IssueDate 2018-01-01
-Paragraph 35H
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2018-03-01&anchor=para_35H&doctype=Standard
-URIDate 2018-03-16

+ Details

Name:	ifrs-full_IncreaseDecreaseThroughForeignExchangeAndOtherMovementsFinancialAssets
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The amount of other comprehensive income, net of tax, related to gains (losses) in relation to changes in the revaluation surplus. [Refer: Other comprehensive income; Revaluation surplus]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2018-01-01
-Paragraph 91
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_91_a&doctype=Standard
-URIDate 2018-03-16

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2018-01-01
-Paragraph 7
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_7&doctype=Standard
-URIDate 2018-03-16

+ Details

Name:	ifrs-full_OtherComprehensiveIncomeNetOfTaxGainsLossesOnRevaluation
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The increase in the fair value measurement of assets resulting from purchases of those assets. [Refer: At fair value [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 13
-IssueDate 2018-01-01
-Paragraph 93
-Subparagraph e
-Clause iii
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=13&date=2018-03-01&anchor=para_93_e_iii&doctype=Standard
-URIDate 2018-03-16

+ Details

Name:	ifrs-full_PurchasesFairValueMeasurementAssets
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The decrease in the fair value measurement of assets resulting from sales. [Refer: At fair value [member]]

+ References

+ Details

Name:	ifrs-full_SalesFairValueMeasurementAssets
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The amount of transfers of assets into Level 3 of the fair value hierarchy. [Refer: Level 3 of fair value hierarchy [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 13
-IssueDate 2018-01-01
-Paragraph 93
-Subparagraph e
-Clause iv
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=13&date=2018-03-01&anchor=para_93_e_iv&doctype=Standard
-URIDate 2018-03-16

+ Details

Name:	ifrs-full_TransfersIntoLevel3OfFairValueHierarchyAssets
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The amount of transfers of assets out of Level 3 of the fair value hierarchy. [Refer: Level 3 of fair value hierarchy [member]]

+ References

+ Details

Name:	ifrs-full_TransfersOutOfLevel3OfFairValueHierarchyAssets
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- References

No definition available.

+ Details

Name:	lyg_FINANCIALINSTRUMENTSDetailsScheduleofMovementsinLevel3PortfolioLineItems
Namespace Prefix:	lyg_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	ifrs-full_CategoriesOfFinancialAssetsAxis=ifrs-full_FinancialAssetsAtFairValueThroughProfitOrLossCategoryMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_LevelsOfFairValueHierarchyAxis=ifrs-full_Level3OfFairValueHierarchyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis=ifrs-full_PreviouslyStatedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis=ifrs-full_IncreaseDecreaseDueToChangesInAccountingPolicyRequiredByIFRSsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_CategoriesOfFinancialAssetsAxis=ifrs-full_FinancialAssetsAvailableforsaleCategoryMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_CategoriesOfFinancialAssetsAxis=lyg_FinancialAssetsExcludingDerivativesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_CategoriesOfFinancialAssetsAxis=ifrs-full_FinancialAssetsAtFairValueThroughOtherComprehensiveIncomeCategoryMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementScenarioAxis=ifrs-full_PreviouslyStatedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: