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Fair Value Measurements (Tables) | 9 Months Ended
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Sep. 30, 2025
Fair Value Measurements |
Fair values of financial and non-financial assets and liabilities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Fair Value Measurements
​ | ​ | ​ | ​ | ​ | Quoted Prices in | ​ | Significant | ​ | Significant
​ | ​ | ​ | ​ | ​ | Active Markets | ​ | Observable | ​ | Unobservable
​ | ​ | ​ | ​ | ​ | for Identical | ​ | Inputs | ​ | Inputs
​ | ​ | Total | ​ | Assets (Level 1) | ​ | (Level 2) | ​ | (Level 3)
September 30, 2025: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Short-term investments | ​ | $ | 88.8 | ​ | $ | — | ​ | $ | 88.8 | ​ | $ | —
Long-term investments | ​ | ​ | 0.2 | ​ | ​ | — | ​ | ​ | 0.2 | ​ | ​ | —
Forward contracts | ​ | ​ | (34.3) | ​ | ​ | — | ​ | ​ | (34.3) | ​ | ​ | —
Redeemable noncontrolling interests | ​ | ​ | (10.2) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (10.2)
Total | ​ | $ | 44.5 | ​ | $ | — | ​ | $ | 54.7 | ​ | $ | (10.2)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
December 31, 2024: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Short-term investments | ​ | $ | 18.4 | ​ | $ | — | ​ | $ | 18.4 | ​ | $ | —
Long-term investments | ​ | ​ | 0.3 | ​ | ​ | — | ​ | ​ | 0.3 | ​ | ​ | —
Forward contracts | ​ | ​ | (1.1) | ​ | ​ | — | ​ | ​ | (1.1) | ​ | ​ | —
Redeemable noncontrolling interests | ​ | ​ | (8.7) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (8.7)
Total | ​ | $ | 8.9 | ​ | $ | — | ​ | $ | 17.6 | ​ | $ | (8.7)

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