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Goodwill & Intangibles (Tables) | 12 Months Ended
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Dec. 31, 2020
Goodwill & Intangibles |
Changes in the carrying amount of goodwill by geographic segment | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2020
​ | ​ | Gross Balance | ​ | Accumulated Impairment Losses | ​ | Net Goodwill
​ | ​ | ​ | ​ | Acquired | ​ | Foreign | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Balance | ​ | During | ​ | Currency | ​ | Balance | ​ | Balance | ​ | Impairment | ​ | Balance | ​ | ​
​ | ​ | January 1, | ​ | the | ​ | Translation | ​ | December 31, | ​ | January 1, | ​ | Loss During | ​ | December 31, | ​ | December 31,
​ |  | 2020 |  | Period |  | and Other |  | 2020 |  | 2020 |  | the Period |  | 2020 |  | 2020
​ | ​ | (in millions)
Americas | ​ | $ | 476.8 | ​ | ​ | 5.5 | ​ | $ | 0.2 | ​ | $ | 482.5 | ​ | $ | (24.5) | ​ | ​ | — | ​ | $ | (24.5) | ​ | $ | 458.0
Europe | ​ |  | 241.4 | ​ |  | — | ​ |  | 10.7 | ​ |  | 252.1 | ​ |  | (129.7) | ​ |  | — | ​ |  | (129.7) | ​ |  | 122.4
APMEA | ​ |  | 30.0 | ​ |  | 3.9 | ​ |  | 1.0 | ​ |  | 34.9 | ​ |  | (12.9) | ​ |  | — | ​ |  | (12.9) | ​ |  | 22.0
Total | ​ | $ | 748.2 | ​ | ​ | 9.4 | ​ | $ | 11.9 | ​ | $ | 769.5 | ​ | $ | (167.1) | ​ | ​ | — | ​ | $ | (167.1) | ​ | $ | 602.4
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2019
​ | ​ | Gross Balance | ​ | Accumulated Impairment Losses | ​ | Net Goodwill
​ | ​ | ​ | ​ | Acquired | ​ | Foreign | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Balance | ​ | During | ​ | Currency | ​ | Balance | ​ | Balance | ​ | Impairment | ​ | Balance | ​ | ​
​ | ​ | January 1, | ​ | the | ​ | Translation | ​ | December 31, | ​ | January 1, | ​ | Loss During | ​ | December 31, | ​ | December 31,
​ |  | 2019 |  | Period |  | and Other |  | 2019 |  | 2019 |  | the Period |  | 2019 |  | 2019
​ | ​ | (in millions)
Americas | ​ | $ | 438.1 | ​ | $ | 38.3 | ​ | $ | 0.4 | ​ | $ | 476.8 | ​ | $ | (24.5) | ​ | $ | — | ​ | $ | (24.5) | ​ | $ | 452.3
Europe | ​ |  | 243.7 | ​ |  | — | ​ |  | (2.3) | ​ |  | 241.4 | ​ |  | (129.7) | ​ |  | — | ​ |  | (129.7) | ​ |  | 111.7
APMEA | ​ |  | 30.1 | ​ |  | — | ​ |  | (0.1) | ​ |  | 30.0 | ​ |  | (12.9) | ​ |  | — | ​ |  | (12.9) | ​ |  | 17.1
Total | ​ | $ | 711.9 | ​ | $ | 38.3 | ​ | $ | (2.0) | ​ | $ | 748.2 | ​ | $ | (167.1) | ​ | $ | — | ​ | $ | (167.1) | ​ | $ | 581.1
Schedule of Intangible assets | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2020 | ​ | December 31, 2019
​ | ​ | Gross | ​ | ​ | ​ | ​ | Net | ​ | Gross | ​ | ​ | ​ | ​ | Net
​ | ​ | Carrying | ​ | Accumulated | ​ | Carrying | ​ | Carrying | ​ | Accumulated | ​ | Carrying
​ |  | Amount |  | Amortization |  | Amount |  | Amount |  | Amortization |  | Amount
​ | ​ | (in millions)
Patents | ​ | $ | 16.1 | ​ | $ | (16.0) | ​ | $ | 0.1 | ​ | $ | 16.1 | ​ | $ | (15.9) | ​ | $ | 0.2
Customer relationships | ​ |  | 236.2 | ​ |  | (165.8) | ​ |  | 70.4 | ​ |  | 232.8 | ​ |  | (156.3) | ​ |  | 76.5
Technology | ​ |  | 58.0 | ​ |  | (36.4) | ​ |  | 21.6 | ​ |  | 56.9 | ​ |  | (31.6) | ​ |  | 25.3
Trade names | ​ |  | 27.0 | ​ |  | (15.1) | ​ |  | 11.9 | ​ |  | 26.0 | ​ |  | (13.1) | ​ |  | 12.9
Other | ​ |  | 4.3 | ​ |  | (3.7) | ​ |  | 0.6 | ​ |  | 4.3 | ​ |  | (3.6) | ​ |  | 0.7
Total amortizable intangibles | ​ |  | 341.6 | ​ |  | (237.0) | ​ |  | 104.6 | ​ |  | 336.1 | ​ |  | (220.5) | ​ |  | 115.6
Indefinite-lived intangible assets | ​ |  | 37.2 | ​ |  | — | ​ |  | 37.2 | ​ |  | 35.8 | ​ |  | — | ​ |  | 35.8
​ | ​ | $ | 378.8 | ​ | $ | (237.0) | ​ | $ | 141.8 | ​ | $ | 371.9 | ​ | $ | (220.5) | ​ | $ | 151.4

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