CONDENSED CONSOLIDATED STATEMENT OF CHANGES IN EQUITY (Parenthetical) - GBP (£) £ in Millions	6 Months Ended
Jun. 30, 2024	Dec. 31, 2023
Statement of changes in equity [abstract]
Total comprehensive income attributable to owners of the parent	£ 1,937	£ 3,619
Equity attributable to owners of parent	44,891	47,164
Share buyback closed period accrual	£ 630	£ 419

The amount of comprehensive income attributable to owners of the parent. [Refer: Comprehensive income]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2023-01-01
-Paragraph 81B
-Subparagraph b
-Clause ii
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_81B_b_ii&doctype=Standard
-URIDate 2023-03-23

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2023-01-01
-Paragraph 106
-Subparagraph a
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_106_a&doctype=Standard
-URIDate 2023-03-23

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration