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Goodwill & Intangibles (Tables) | 12 Months Ended
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Dec. 31, 2023
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 | ​ | 2023 - | ​ | ​
​ | ​ | January 1, | ​ | the | ​ | December 31, | ​ | January 1, | ​ | Loss During | ​ | December 31, | ​ | December 31, | ​ | December 31,
​ |  | 2023 |  | Period |  | 2023 |  | 2023 |  | the Period |  | 2023 |  | 2023 |  | 2023
​ | ​ | (in millions)
Americas | ​ | $ | 490.3 | ​ | $ | 96.6 | ​ | $ | 586.9 | ​ | $ | (24.5) | ​ | $ | — | ​ | $ | (24.5) | ​ | $ | 0.2 | ​ | $ | 562.6
Europe | ​ |  | 236.7 | ​ |  | — | ​ |  | 236.7 | ​ |  | (129.7) | ​ |  | — | ​ |  | (129.7) | ​ |  | 3.1 | ​ |  | 110.1
APMEA | ​ |  | 32.5 | ​ |  | 0.9 | ​ |  | 33.4 | ​ |  | (12.9) | ​ |  | — | ​ |  | (12.9) | ​ |  | (0.2) | ​ |  | 20.3
Total | ​ | $ | 759.5 | ​ | $ | 97.5 | ​ | $ | 857.0 | ​ | $ | (167.1) | ​ | $ | — | ​ | $ | (167.1) | ​ | $ | 3.1 | ​ | $ | 693.0
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Gross Balance | ​ | Accumulated Impairment Losses | ​ | Foreign Currency Translation | ​ | Net Goodwill
​ | ​ | ​ | ​ | Acquired | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | January 1, | ​ | ​
​ | ​ | Balance | ​ | During | ​ | Balance | ​ | Balance | ​ | Impairment | ​ | Balance | ​ | 2022 - | ​ | ​
​ | ​ | January 1, | ​ | the | ​ | December 31, | ​ | January 1, | ​ | Loss During | ​ | December 31, | ​ | December 31, | ​ | December 31,
​ |  | 2022 |  | Period |  | 2022 |  | 2022 |  | the Period |  | 2022 |  | 2022 |  | 2022
​ | ​ | (in millions)
Americas | ​ | $ | 490.9 | ​ | $ | — | ​ | $ | 490.9 | ​ | $ | (24.5) | ​ | $ | — | ​ | $ | (24.5) | ​ | $ | (0.6) | ​ | $ | 465.8
Europe | ​ |  | 242.9 | ​ |  | — | ​ |  | 242.9 | ​ |  | (129.7) | ​ |  | — | ​ |  | (129.7) | ​ |  | (6.2) | ​ |  | 107.0
APMEA | ​ |  | 34.0 | ​ |  | — | ​ |  | 34.0 | ​ |  | (12.9) | ​ |  | — | ​ |  | (12.9) | ​ |  | (1.5) | ​ |  | 19.6
Total | ​ | $ | 767.8 | ​ | $ | — | ​ | $ | 767.8 | ​ | $ | (167.1) | ​ | $ | — | ​ | $ | (167.1) | ​ | $ | (8.3) | ​ | $ | 592.4
Schedule of Intangible assets | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2023 | ​ | December 31, 2022
​ | ​ | 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 | ​ |  | 218.0 | ​ |  | (85.3) | ​ |  | 132.7 | ​ |  | 175.1 | ​ |  | (118.6) | ​ |  | 56.5
Technology | ​ |  | 53.2 | ​ |  | (44.2) | ​ |  | 9.0 | ​ |  | 53.2 | ​ |  | (40.5) | ​ |  | 12.7
Trade names | ​ |  | 20.8 | ​ |  | (12.3) | ​ |  | 8.5 | ​ |  | 19.8 | ​ |  | (10.8) | ​ |  | 9.0
Other | ​ |  | 1.1 | ​ |  | (0.7) | ​ |  | 0.4 | ​ |  | 1.1 | ​ |  | (0.6) | ​ |  | 0.5
Total amortizable intangibles | ​ |  | 298.1 | ​ |  | (147.5) | ​ |  | 150.6 | ​ |  | 254.2 | ​ |  | (175.5) | ​ |  | 78.7
Indefinite-lived intangible assets | ​ |  | 65.5 | ​ |  | — | ​ |  | 65.5 | ​ |  | 35.0 | ​ |  | — | ​ |  | 35.0
​ | ​ | $ | 363.6 | ​ | $ | (147.5) | ​ | $ | 216.1 | ​ | $ | 289.2 | ​ | $ | (175.5) | ​ | $ | 113.7

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