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Cash and cash equivalents and debt financing - Analysis of Future Anticipated Cash Flows Related to Debt (Detail) - GBP (£) £ in Millions | Jun. 30, 2021 | Jun. 30, 2020
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Disclosure of maturity analysis for non-derivative financial liabilities [Line items] |  |
Future anticipated cash flows | £ (6,129.0) | £ (14,829.9)
Effect of discounting/financing rates | 1,039.2 | 1,235.2
Debt financing | (5,089.8) | (13,594.7)
Borrowings [member] |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line items] |  |
Future anticipated cash flows | (5,929.8) | (6,267.9)
Borrowings [member] | Within one year [member] |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line items] |  |
Corporate bonds, bank loans and overdrafts | (711.5) | (182.2)
Borrowings [member] | Between one and two years [member] |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line items] |  |
Corporate bonds, bank loans and overdrafts | (117.0) | (725.6)
Borrowings [member] | Between two and three years [member] |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line items] |  |
Corporate bonds, bank loans and overdrafts | (749.6) | (795.7)
Borrowings [member] | Between three and four years [member] |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line items] |  |
Corporate bonds, bank loans and overdrafts | (1,052.4) | (649.1)
Borrowings [member] | Between four and five years [member] |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line items] |  |
Corporate bonds, bank loans and overdrafts | (71.4) | (528.2)
Borrowings [member] | Over five years [member] |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line items] |  |
Corporate bonds, bank loans and overdrafts | (3,227.9) | (3,387.1)
Bank overdrafts [member] | Within one year [member] |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line items] |  |
Future anticipated cash flows | £ (199.2) | £ (8,562.0)

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