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v3.22.1

Equity (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2022
Equity |
Summary of the status of the Company's restricted stock units and changes during the year | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Weighted | ​ | ​ | ​
​ | ​ | ​ | ​ | Average | ​ | ​ | ​
​ | ​ | ​ | ​ | Grant Date | ​ | Aggregate
​ | ​ | ​ | ​ | Fair Value | ​ | Fair Value
​ | ​ | RSUs and PSUs | ​ | Per RSU | ​ | (in millions)
Unvested at January 1, 2022 | ​ | 831,597 | ​ | $ | 105.12 | ​ | ​ | ​
Granted(1) | ​ | 305,249 | ​ | ​ | 187.31 | ​ | ​ | ​
Vested | ​ | (23,280) | ​ | ​ | 95.87 | ​ | ​ | ​
Cancelled or forfeited | ​ | (18,607) | ​ | ​ | 114.28 | ​ | ​ | ​
Unvested at March 31, 2022 | ​ | 1,094,959 | ​ | $ | 128.07 | ​ | $ | 257.7
Shares reserved for future grants (all plans) | ​ | 1,569,117 | ​ | ​ | ​ | ​ | ​ | ​
(1) | Comprised of 56,452 RSUs granted in January 2022 with a fair value of $152.21 per unit, and 136,346 RSUs and 112,451 PSUs granted in March 2022 with a fair value of $195.28 per unit. The service-based RSUs cliff vest on December 1, 2024 and the performance-based RSUs are subject to a three-year performance period ending December 31, 2024.
Schedule of accumulated other comprehensive loss | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | Foreign Currency | ​ | Postretirement Benefit | ​ | Accumulated Other
​ | Translation | ​ | Plan Adjustments, | ​ | Comprehensive
​ | (Loss) Gain |  | Net of Tax |  | (Loss) Income
​ | ​ | ​ | ​ | (in millions) | ​ | ​ | ​
Balance as of January 1, 2022 | $ | (55.2) | ​ | $ | (13.7) | ​ | $ | (68.9)
Current-period change | ​ | 0.7 | ​ | ​ | (0.1) | ​ | ​ | 0.6
Balance as of March 31, 2022 | $ | (54.5) | ​ | $ | (13.8) | ​ | $ | (68.3)

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