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Equity - Schedule of fair value of each share award used the Monte Carlo pricing model and weighted average assumptions (Details) $ / shares in Units, shares in Millions, $ in Millions | 12 Months Ended
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Jun. 30, 2024 USD ($) £ / shares shares | Jun. 30, 2024 USD ($) $ / shares shares | Jun. 30, 2023 USD ($) £ / shares shares | Jun. 30, 2023 USD ($) $ / shares shares | Jun. 30, 2022 USD ($) £ / shares shares | Jun. 30, 2022 USD ($) $ / shares shares
Disclosure of reserves within equity [abstract] |  |  |  |  |  |
Risk free interest rate | 4.70% | 4.70% | 3.10% | 3.10% | 0.40% | 0.40%
Expected life of the awards | 33 months | 33 months | 35 months | 35 months | 40 months | 40 months
Dividend yield | 2.60% | 2.60% | 2.00% | 2.00% | 2.10% | 2.10%
Weighted average share price (in GBP per share) | £ / shares | £ 31.18 |  | £ 37.58 |  | £ 35.45 |
Weighted average fair value of awards granted in the year (in USD per share) | $ / shares |  | $ 17.57 |  | $ 23.18 |  | $ 37.54
Number of awards granted in the year (in shares) | shares | 2.1 | 2.1 | 1.7 | 1.7 | 2.1 | 2.1
Fair value of all awards granted in the year (in million of dollars) | $ | £ 36 | $ 36 | £ 40 | $ 40 | £ 79 | $ 79

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- Definition Fair value at measurement date share awards granted. + References No definition available. + Details
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- Definition Number Of Instruments Granted In Share Awards Arrangement + References No definition available. + Details
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- Definition Description of option life share awards granted + References No definition available. + Details
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- Definition Risk Free Interest Rate, Share Awards Granted + References No definition available. + Details
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- Definition Weighted Average Fair Value At Measurement Date, Share Awards Granted + References No definition available. + Details
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- Definition Weighted Average Share Price, Share Awards Granted + References No definition available. + Details
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- References No definition available. + Details
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