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v3.25.1

Equity (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2025
Equity |
Summary of the status of the Company's restricted stock units and changes during the year | ​
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Weighted
​ | ​ | ​ | ​ | Average
​ | ​ | ​ | ​ | Grant Date
​ | ​ | RSU and PSU | ​ | Fair Value
​ | ​ | Aggregate Units | ​ | Per Unit
Unvested as of January 1, 2025 | ​ | 327,017 | ​ | $ | 267.96
Granted(1) | ​ | 162,900 | ​ | ​ | 299.38
Vested | ​ | (425) | ​ | ​ | 261.27
Cancelled or forfeited | ​ | (3,542) | ​ | ​ | 270.78
Unvested as of March 31, 2025 | ​ | 485,950 | ​ | $ | 278.48
Shares reserved for future grants (all plans) | ​ | 1,223,658 | ​ | ​ | ​
(1) | Comprised of 96,973 RSUs and 65,927 PSUs granted in February 2025. The RSUs cliff vest on December 1, 2027 and the PSUs vest upon the completion of a 3-year performance period ending December 31, 2027.
Schedule of accumulated other comprehensive loss | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Pension and | ​ | ​
​ | Foreign Currency | ​ | Postretirement Benefit | ​ | Accumulated Other
​ | Translation | ​ | Plan Adjustments, | ​ | Comprehensive
​ | (Loss) Gain |  | Net of Tax |  | (Loss) Income
​ | ​ | ​ | ​ | (in millions) | ​ | ​ | ​
Balance as of January 1, 2025 | $ | (119.7) | ​ | $ | 4.5 | ​ | $ | (115.2)
Current-period change | ​ | 3.3 | ​ | ​ | (0.9) | ​ | ​ | 2.4
Balance as of March 31, 2025 | $ | (116.4) | ​ | $ | 3.6 | ​ | $ | (112.8)

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