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v3.25.2

Impairment and restructuring charges - Schedule of Restructuring Reserve by Type of Cost (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Mar. 31, 2025 | Jun. 30, 2024 | Mar. 31, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Restructuring Reserve [Roll Forward] |  |  |  |  |  |
Accruals | $ (1.1) |  | $ 17.1 |  | $ (2.4) | $ 16.6
January 2023 Restructuring Plan |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |
Beginning balance |  |  | 0.1 | $ 1.4 |  | 1.4
Cash payments |  |  | (0.1) | (1.3) |  |
Ending balance |  |  | 0.0 | 0.1 |  | 0.0
August 2023 Restructuring Plan |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |
Beginning balance |  |  | 1.3 | 5.4 |  | 5.4
Accruals |  |  | (0.1) | (0.5) |  |
Cash payments |  |  | (0.6) | (3.6) |  |
Ending balance |  |  | 0.6 | 1.3 |  | 0.6
May 2024 Restructuring Plan |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |
Beginning balance | 1.8 | $ 5.3 | 0.0 |  | 5.3 |
Accruals | (0.9) | (0.7) | 17.2 |  |  |
Cash payments | (0.8) | (2.8) | (0.2) |  |  |
Ending balance | 0.1 | 1.8 | 17.0 | 0.0 | 0.1 | 17.0
August 2024 Restructuring Plan |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |
Beginning balance | 0.6 | 2.4 |  |  | 2.4 |
Accruals | (0.2) | (0.6) |  |  |  |
Cash payments | (0.4) | (1.2) |  |  |  |
Ending balance | 0.0 | 0.6 |  |  | 0.0 |
Employee transition |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |
Accruals | 0.0 |  | 0.2 |  | 0.0 | 0.2
Employee transition | January 2023 Restructuring Plan |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |
Beginning balance |  |  | 0.0 | 0.0 |  | 0.0
Cash payments |  |  | 0.0 | 0.0 |  |
Ending balance |  |  | 0.0 | 0.0 |  | 0.0
Employee transition | August 2023 Restructuring Plan |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |
Beginning balance |  |  | 0.0 | 0.0 |  | 0.0
Accruals |  |  | 0.0 | 0.0 |  |
Cash payments |  |  | 0.0 | 0.0 |  |
Ending balance |  |  | 0.0 | 0.0 |  | 0.0
Employee transition | May 2024 Restructuring Plan |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |
Beginning balance | 0.0 | 0.0 | 0.0 |  | 0.0 |
Accruals | 0.0 | 0.0 | 0.2 |  |  |
Cash payments | 0.0 | 0.0 | (0.2) |  |  |
Ending balance | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0
Employee transition | August 2024 Restructuring Plan |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |
Beginning balance | 0.0 | 0.0 |  |  | 0.0 |
Accruals | 0.0 | 0.0 |  |  |  |
Cash payments | 0.0 | 0.0 |  |  |  |
Ending balance | 0.0 | 0.0 |  |  | 0.0 |
Severance payments |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |
Accruals | (1.1) |  | 14.8 |  | (1.3) | 14.3
Severance payments | January 2023 Restructuring Plan |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |
Beginning balance |  |  | 0.1 | 1.4 |  | 1.4
Cash payments |  |  | (0.1) | (1.3) |  |
Ending balance |  |  | 0.0 | 0.1 |  | 0.0
Severance payments | August 2023 Restructuring Plan |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |
Beginning balance |  |  | 1.2 | 5.3 |  | 5.3
Accruals |  |  | (0.1) | (0.5) |  |
Cash payments |  |  | (0.5) | (3.6) |  |
Ending balance |  |  | 0.6 | 1.2 |  | 0.6
Severance payments | May 2024 Restructuring Plan |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |
Beginning balance | 1.8 | 4.5 | 0.0 |  | 4.5 |
Accruals | (0.9) | 0.0 | 14.8 |  |  |
Cash payments | (0.8) | (2.7) | 0.0 |  |  |
Ending balance | 0.1 | 1.8 | 14.8 | 0.0 | 0.1 | 14.8
Severance payments | August 2024 Restructuring Plan |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |
Beginning balance | 0.6 | 1.9 |  |  | 1.9 |
Accruals | (0.2) | (0.2) |  |  |  |
Cash payments | (0.4) | (1.1) |  |  |  |
Ending balance | 0.0 | 0.6 |  |  | 0.0 |
Employee benefits |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |
Accruals | 0.0 |  | 2.1 |  | (1.1) | 2.1
Employee benefits | January 2023 Restructuring Plan |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |
Beginning balance |  |  | 0.0 | 0.0 |  | 0.0
Cash payments |  |  | 0.0 | 0.0 |  |
Ending balance |  |  | 0.0 | 0.0 |  | 0.0
Employee benefits | August 2023 Restructuring Plan |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |
Beginning balance |  |  | 0.1 | 0.1 |  | 0.1
Accruals |  |  | 0.0 | 0.0 |  |
Cash payments |  |  | (0.1) | 0.0 |  |
Ending balance |  |  | 0.0 | 0.1 |  | 0.0
Employee benefits | May 2024 Restructuring Plan |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |
Beginning balance | 0.0 | 0.8 | 0.0 |  | 0.8 |
Accruals | 0.0 | (0.7) | 2.2 |  |  |
Cash payments | 0.0 | (0.1) | 0.0 |  |  |
Ending balance | 0.0 | 0.0 | $ 2.2 | $ 0.0 | 0.0 | $ 2.2
Employee benefits | August 2024 Restructuring Plan |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |
Beginning balance | 0.0 | 0.5 |  |  | 0.5 |
Accruals | 0.0 | (0.4) |  |  |  |
Cash payments | 0.0 | (0.1) |  |  |  |
Ending balance | $ 0.0 | $ 0.0 |  |  | $ 0.0 |

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