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Post employment benefits - Schedule of charge before taxation (Details) - GBP (£) £ in Millions | 12 Months Ended
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Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2020
Disclosure of net defined benefit liability (asset) [line items] |  |  |
Charge before taxation | £ (29) | £ (87) | £ (38)
United Kingdom |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |
Charge before taxation | (27) | (46) | (23)
Ireland |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |
Charge before taxation | 45 | 4 | 34
United States |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |
Charge before taxation | (31) | (28) | (30)
Other |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |
Charge before taxation | £ (16) | £ (17) | £ (19)

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
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- Definition The amount of post-employment benefit expense included in profit or loss relating to defined benefit plans. [Refer: Profit (loss); Defined benefit plans [member]] [Contrast: Increase (decrease) in net defined benefit liability (asset) resulting from expense (income) in profit or loss] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2021-01-01 -Paragraph 5 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2021-en-r&anchor=para_5&doctype=Standard -URIDate 2021-03-24 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2021-01-01 -Paragraph 135 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2021-en-r&anchor=para_135_b&doctype=Standard -URIDate 2021-03-24 + Details
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