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Goodwill & Intangibles (Tables) | 3 Months Ended
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Mar. 31, 2024
Goodwill & Intangibles |
Changes in the carrying amount of goodwill by geographic segment | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Gross Balance | ​ | Accumulated Impairment Losses | ​ | Foreign Currency Translation | ​ | Net Goodwill
​ | ​ | ​ | ​ | Acquired | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | January 1, | ​ | ​
​ | ​ | Balance | ​ | During | ​ | Balance | ​ | Balance | ​ | Impairment | ​ | Balance | ​ | 2024 - | ​ | ​
​ | ​ | January 1, | ​ | the | ​ | March 31, | ​ | January 1, | ​ | Loss During | ​ | March 31, | ​ | March 31, | ​ | March 31,
​ |  | 2024 |  | Period |  | 2024 |  | 2024 |  | the Period |  | 2024 |  | 2024 |  | 2024
​ | ​ | (in millions)
Americas | ​ | $ | 587.1 | ​ | $ | 34.8 | ​ | $ | 621.9 | ​ | $ | (24.5) | ​ | $ | — | ​ | $ | (24.5) | ​ | $ | (0.2) | ​ | $ | 597.2
Europe | ​ |  | 239.8 | ​ |  | — | ​ |  | 239.8 | ​ |  | (129.7) | ​ |  | — | ​ |  | (129.7) | ​ |  | (2.4) | ​ |  | 107.7
APMEA | ​ |  | 33.2 | ​ |  | — | ​ |  | 33.2 | ​ |  | (12.9) | ​ |  | — | ​ |  | (12.9) | ​ |  | (0.9) | ​ |  | 19.4
Total | ​ | $ | 860.1 | ​ | $ | 34.8 | ​ | $ | 894.9 | ​ | $ | (167.1) | ​ | $ | — | ​ | $ | (167.1) | ​ | $ | (3.5) | ​ | $ | 724.3
Schedule of Intangible assets | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | March 31, 2024 | ​ | December 31, 2023
​ | ​ | Gross | ​ | ​ | ​ | ​ | Net | ​ | Gross | ​ | ​ | ​ | ​ | Net
​ | ​ | Carrying | ​ | Accumulated | ​ | Carrying | ​ | Carrying | ​ | Accumulated | ​ | Carrying
​ |  | Amount |  | Amortization |  | Amount |  | Amount |  | Amortization |  | Amount
​ | ​ | (in millions)
Patents | ​ | $ | 5.0 | ​ | $ | (5.0) | ​ | $ | — | ​ | $ | 5.0 | ​ | $ | (5.0) | ​ | $ | —
Customer relationships | ​ |  | 252.0 | ​ |  | (89.0) | ​ |  | 163.0 | ​ |  | 218.0 | ​ |  | (85.3) | ​ |  | 132.7
Technology | ​ |  | 53.2 | ​ |  | (45.1) | ​ |  | 8.1 | ​ |  | 53.2 | ​ |  | (44.2) | ​ |  | 9.0
Trade names | ​ |  | 20.7 | ​ |  | (12.3) | ​ |  | 8.4 | ​ |  | 20.8 | ​ |  | (12.3) | ​ |  | 8.5
Other | ​ |  | 1.1 | ​ |  | (0.7) | ​ |  | 0.4 | ​ |  | 1.1 | ​ |  | (0.7) | ​ |  | 0.4
Total amortizable intangibles | ​ |  | 332.0 | ​ |  | (152.1) | ​ |  | 179.9 | ​ |  | 298.1 | ​ |  | (147.5) | ​ |  | 150.6
Indefinite-lived intangible assets | ​ |  | 71.0 | ​ |  | — | ​ |  | 71.0 | ​ |  | 65.5 | ​ |  | — | ​ |  | 65.5
​ | ​ | $ | 403.0 | ​ | $ | (152.1) | ​ | $ | 250.9 | ​ | $ | 363.6 | ​ | $ | (147.5) | ​ | $ | 216.1

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