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Goodwill and Other Intangible Assets, net - Changes in the Carrying Amount of Goodwill (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2020 USD ($) business | Dec. 31, 2019 USD ($) business | Dec. 31, 2018 USD ($)
Changes in the carrying amount of goodwill |  |  |
Goodwill, Balance at the beginning of the period | $ 1,716.3 | $ 1,441.8 |
Goodwill acquired during the year | 18.1 | 274.5 |
Measurement period adjustments | (2.3) | 0.2 |
Currency translation and other | 6.1 | (0.2) |
Goodwill, Balance at the end of the period | $ 1,738.2 | $ 1,716.3 | $ 1,441.8
Number of businesses acquired | business | 1 | 5 |
Acquisition price | $ 3.2 | $ 42.4 |
Carlisle Construction Materials |  |  |
Changes in the carrying amount of goodwill |  |  |
Goodwill, Balance at the beginning of the period | 597.1 | 532.8 |
Goodwill acquired during the year | 12.5 | 64.3 |
Measurement period adjustments | 0.0 | 0.5 |
Currency translation and other | 3.4 | (0.5) |
Goodwill, Balance at the end of the period | 613.0 | 597.1 | 532.8
Carlisle Interconnect Technologies |  |  |
Changes in the carrying amount of goodwill |  |  |
Goodwill, Balance at the beginning of the period | 835.2 | 643.1 |
Goodwill acquired during the year | 2.8 | 194.1 |
Measurement period adjustments | (2.3) | (1.9) |
Currency translation and other | (0.1) | (0.1) |
Goodwill, Balance at the end of the period | 835.6 | 835.2 | 643.1
Carlisle Fluid Technologies |  |  |
Changes in the carrying amount of goodwill |  |  |
Goodwill, Balance at the beginning of the period | 187.5 | 169.5 |
Goodwill acquired during the year | 2.8 | 16.1 |
Measurement period adjustments | 0.0 | 1.6 |
Currency translation and other | 2.8 | 0.3 |
Goodwill, Balance at the end of the period | 193.1 | 187.5 | 169.5
Carlisle Brake & Friction |  |  |
Changes in the carrying amount of goodwill |  |  |
Goodwill, Balance at the beginning of the period | 96.5 | 96.4 |
Goodwill acquired during the year | 0.0 | 0.0 |
Measurement period adjustments | 0.0 | 0.0 |
Currency translation and other | 0.0 | 0.1 |
Goodwill, Balance at the end of the period | $ 96.5 | $ 96.5 | 96.4
Impairment charges |  |  | $ 130.0

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