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Earnings (loss) per share - Narrative (Details) - USD ($) $ in Millions | Jun. 30, 2024 | Jun. 30, 2023 | Oct. 31, 2021
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Business Acquisition [Line Items] |  |  |
Common stock equivalents, amount in excess of fair market value | $ 34 | $ 34 |
Kloosterboer Group B.V. |  |  |
Business Acquisition [Line Items] |  |  |
Business acquisition, percentage of voting interests acquired |  |  | 100.00%

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