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Goodwill and Other Intangible Assets, net (Tables) | 3 Months Ended
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Mar. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract] |
Summary of changes in the carrying amount of goodwill | The changes in the carrying amount of goodwill, net by segment follows:
(in millions) |  | CCM |  | CIT |  | CFT |  | Total
Balance as of December 31, 2020 |  | $ | 613.0 |  |  | $ | 835.6 |  |  | $ | 193.1 |  |  | $ | 1,641.7 |
Measurement period adjustments(1) |  | — |  |  | — |  |  | (0.2) |  |  | (0.2) |
Currency translation and other |  | (1.5) |  |  | (0.4) |  |  | (0.6) |  |  | (2.5) |
Balance as of March 31, 2021 |  | $ | 611.5 |  |  | $ | 835.2 |  |  | $ | 192.3 |  |  | $ | 1,639.0 |
(1)Refer to Note 3 for further information on goodwill resulting from recent acquisitions.
Summary of other intangible assets, net | A summary of the Company's other intangible assets, net follows:
|  | March 31, 2021 |  | December 31, 2020
(in millions) |  | Acquired Cost |  | Accumulated Amortization |  | Net Book Value |  | Acquired Cost |  | Accumulated Amortization |  | Net Book Value
Assets subject to amortization: |  |  |  |  |  |  |  |  |  |  |  |
Customer relationships |  | $ | 998.1 |  |  | $ | (410.8) |  |  | $ | 587.3 |  |  | $ | 1,000.7 |  |  | $ | (393.7) |  |  | $ | 607.0 |
Technology and intellectual property |  | 260.9 |  |  | (178.6) |  |  | 82.3 |  |  | 263.0 |  |  | (172.6) |  |  | 90.4 |
Trade names and other |  | 116.4 |  |  | (53.4) |  |  | 63.0 |  |  | 115.6 |  |  | (48.7) |  |  | 66.9 |
Assets not subject to amortization: |  |  |  |  |  |  |  |  |  |  |  |
Trade names |  | 195.8 |  |  | — |  |  | 195.8 |  |  | 196.6 |  |  | — |  |  | 196.6 |
Other intangible assets, net |  | $ | 1,571.2 |  |  | $ | (642.8) |  |  | $ | 928.4 |  |  | $ | 1,575.9 |  |  | $ | (615.0) |  |  | $ | 960.9 |
Summary of the net book values of other intangible assets, net by reportable segment | The net book values of other intangible assets, net by reportable segment follows:
(in millions) |  | March 31, 2021 |  | December 31, 2020
Carlisle Construction Materials |  | $ | 288.0 |  |  | $ | 300.9 |
Carlisle Interconnect Technologies |  | 372.4 |  |  | 384.8 |
Carlisle Fluid Technologies |  | 256.0 |  |  | 261.3 |
Corporate |  | 12.0 |  |  | 13.9 |
Total |  | $ | 928.4 |  |  | $ | 960.9 |

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