Condensed consolidated statement of comprehensive income (Parenthetical) - Main Scheme - GBP (£) £ in Millions	1 Months Ended	6 Months Ended
Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021
Disclosure of transactions between related parties [line items]
Contributions	£ 500	£ 500	£ 500
Decrease in equity	£ 365	£ 365	£ 354

The amount of employer contributions to retirement benefit plans.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 26
-IssueDate 2021-01-01
-Paragraph 35
-Subparagraph b
-Clause i
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=26&code=ifrs-tx-2021-en-r&anchor=para_35_b_i&doctype=Standard
-URIDate 2021-03-24

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