Fair values of financial assets and liabilities - Schedule of Movements in Level 3 Financial Liabilities Portfolio (Details) - Level 3 - GBP (£) £ in Millions	6 Months Ended
Jun. 30, 2023	Jun. 30, 2022
Reconciliation of changes in fair value measurement, liabilities [abstract]
Balance at beginning of period	£ 653	£ 981
Exchange and other adjustments	(8)	17
Losses (gains) recognised in the income statement within other income	(56)	13
Additions	31	41
Redemptions	(37)	(15)
Transfers into the level 3 portfolio	2	0
Transfers out of the level 3 portfolio	(1)	(181)
Balance at end of period	584	856
Financial liabilities at fair value through profit or loss
Reconciliation of changes in fair value measurement, liabilities [abstract]
Balance at beginning of period	45	37
Exchange and other adjustments	0	0
Losses (gains) recognised in the income statement within other income	1	8
Additions	0	4
Redemptions	(1)	(2)
Transfers into the level 3 portfolio	2	0
Transfers out of the level 3 portfolio	(1)	(3)
Balance at end of period	46	44
(Losses) gains recognised in the income statement, within other income, relating to the change in fair value of those liabilities held	1	7
Derivative financial instruments
Reconciliation of changes in fair value measurement, liabilities [abstract]
Balance at beginning of period	608	944
Exchange and other adjustments	(8)	17
Losses (gains) recognised in the income statement within other income	(57)	5
Additions	31	37
Redemptions	(36)	(13)
Transfers into the level 3 portfolio	0	0
Transfers out of the level 3 portfolio	0	(178)
Balance at end of period	538	812
(Losses) gains recognised in the income statement, within other income, relating to the change in fair value of those liabilities held	(58)	33
Financial liabilities carried at fair value
Reconciliation of changes in fair value measurement, liabilities [abstract]
(Losses) gains recognised in the income statement, within other income, relating to the change in fair value of those liabilities held	£ (57)	£ 40

The amount of liabilities that are: (a) a contractual obligation: (i) to deliver cash or another financial asset to another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially unfavourable to the entity; or (b) 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 deliver 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, rights, options or warrants to acquire a fixed number of the entity’s own equity instruments for a fixed amount of any currency are equity instruments if the entity offers the rights, options or warrants pro rata to all of its existing owners of the same class of its own non-derivative equity instruments. Also, for those purposes the entity’s own equity instruments do not include puttable financial instruments that are 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. As an exception, an instrument that meets the definition of a financial liability is classified as an equity instrument if it has all the features and meets the conditions in paragraphs 16A-16B or paragraphs 16C-16D of IAS 32. [Refer: Financial instruments, class [member]; Financial assets; Derivatives [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2022-03-24
-Paragraph 25
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_25&doctype=Standard
-URIDate 2022-03-24

+ Details

Name:	ifrs-full_FinancialLiabilities
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The gains (losses) excluding exchange differences, recognised in profit or loss, on the fair value measurement of liabilities. [Refer: At fair value [member]]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IFRS
-Number 13
-IssueDate 2022-03-24
-Paragraph 93
-Subparagraph e
-Clause i
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2022-en-r&anchor=para_93_e_i&doctype=Standard
-URIDate 2022-03-24

+ Details

Name:	ifrs-full_GainsLossesRecognisedInProfitOrLossExcludingExchangeDifferencesFairValueMeasurementLiabilities
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
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 of property, plant and equipment, right-of-use assets and intangible assets. [Refer: Other comprehensive income; Revaluation surplus]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2022-03-24
-Paragraph 91
-Subparagraph a
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_91_a&doctype=Standard
-URIDate 2022-03-24

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2022-03-24
-Paragraph 7
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_7&doctype=Standard
-URIDate 2022-03-24

+ 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 liabilities resulting from purchases of those liabilities. [Refer: At fair value [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 13
-IssueDate 2022-03-24
-Paragraph 93
-Subparagraph e
-Clause iii
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2022-en-r&anchor=para_93_e_iii&doctype=Standard
-URIDate 2022-03-24

+ Details

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

- References

No definition available.

+ Details

Name:	ifrs-full_ReconciliationOfChangesInFairValueMeasurementLiabilitiesAbstract
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of transfers of liabilities 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 2022-03-24
-Paragraph 93
-Subparagraph e
-Clause iv
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2022-en-r&anchor=para_93_e_iv&doctype=Standard
-URIDate 2022-03-24

+ Details

Name:	ifrs-full_TransfersIntoLevel3OfFairValueHierarchyLiabilities
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

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

+ References

+ Details

Name:	ifrs-full_TransfersOutOfLevel3OfFairValueHierarchyLiabilities
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The increase in the fair value measurement of liabilities resulting from exchange and other adjustments.

+ References

No definition available.

+ Details

Name:	lyg_ExchangeAndOtherAdjustmentsFairValueMeasurementLiabilities
Namespace Prefix:	lyg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The decrease in the fair value measurement of liabilities resulting from redemption.

+ References

No definition available.

+ Details

Name:	lyg_RedemptionFairValueMeasurementLiabilities
Namespace Prefix:	lyg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

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

- Details

Name:	ifrs-full_CategoriesOfFinancialLiabilitiesAxis=ifrs-full_FinancialLiabilitiesAtFairValueThroughProfitOrLossCategoryMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_CategoriesOfFinancialLiabilitiesAxis=ifrs-full_DerivativesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_CategoriesOfFinancialLiabilitiesAxis=ifrs-full_FinancialLiabilitiesAtFairValueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: