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Equity - Annual fair value charge in respect of the equity settled plans (Details) - GBP (£) £ in Millions	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Disclosure of fair value measurement of equity [line items]
Annual fair value charge of equity settled plans	£ 50	£ 3	£ 50
Executive share award plans
Disclosure of fair value measurement of equity [line items]
Annual fair value charge of equity settled plans	41	(3)	41
Executive share option plans
Disclosure of fair value measurement of equity [line items]
Annual fair value charge of equity settled plans	4	2	4
Savings plans
Disclosure of fair value measurement of equity [line items]
Annual fair value charge of equity settled plans	4	3	4
Equity-settled plans
Disclosure of fair value measurement of equity [line items]
Annual fair value charge of equity settled plans	£ 49	£ 2	£ 49

X

- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

+ References

No definition available.

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- Definition

The amount of expense from share-based payment transactions with employees.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2020-01-01
-Paragraph 112
-Subparagraph c
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-URIDate 2020-01-01

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