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Segment analysis - Segment Results (Details) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2025 USD ($) | Jun. 30, 2024 USD ($) customer | Jun. 30, 2025 USD ($) customer | Jun. 30, 2024 USD ($) customer | Dec. 31, 2024 USD ($)
Segment analysis |  |  |  |  |
Revenue | $ 1,455 | $ 1,259 | $ 2,723 | $ 2,400 |
Adjusted EBITDA | 210 | $ 178 | 365 | $ 312 |
Segment assets | 5,488 |  | $ 5,488 |  | $ 5,462
Number of customers accounting for greater than 10% of revenue | customer |  | 1 | 1 | 1 |
Europe |  |  |  |  |
Segment analysis |  |  |  |  |
Revenue | 615 | $ 566 | $ 1,143 | $ 1,047 |
Adjusted EBITDA | 77 | 79 | 126 | 122 |
Americas |  |  |  |  |
Segment analysis |  |  |  |  |
Revenue | 840 | 693 | 1,580 | 1,353 |
Adjusted EBITDA | $ 133 | $ 99 | $ 239 | $ 190 |

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