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Goodwill and Intangible Assets - Goodwill (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 26, 2020 | Sep. 26, 2020 | Dec. 31, 2019
Goodwill [Roll Forward] |  |  |  |  |
December 31, 2019 |  |  |  | $ 4,116.7 |
Purchase accounting adjustments |  |  |  | 1.6 |
Business acquisitions |  |  |  | 15.9 |
Business divestitures |  |  |  | (115.6) |
Impairments |  |  |  | (202.4) |
Currency translation adjustments |  |  |  | 23.1 |
September 26, 2020 |  | $ 3,839.3 |  | 3,839.3 |
CSCA |  |  |  |  |
Goodwill [Roll Forward] |  |  |  |  |
December 31, 2019 |  |  |  | 1,899.1 |
Purchase accounting adjustments |  |  |  | (10.4) |
Business acquisitions |  |  |  | 14.1 |
Business divestitures |  |  |  | 0.0 |
Impairments |  |  |  | 0.0 |
Currency translation adjustments |  |  |  | (4.0) |
September 26, 2020 |  | 1,898.8 |  | 1,898.8 |
CSCI |  |  |  |  |
Goodwill [Roll Forward] |  |  |  |  |
December 31, 2019 | [1] |  |  | 1,203.7 |
Purchase accounting adjustments | [1] |  |  | 12.0 |
Business acquisitions | [1] |  |  | 1.8 |
Business divestitures | [1] |  |  | (115.6) |
Impairments |  |  |  | 0.0 |
Currency translation adjustments | [1] |  |  | 27.5 |
September 26, 2020 | [1] | 1,129.4 |  | 1,129.4 |
Accumulated impairments |  | 868.4 |  | 868.4 | $ 868.4
RX |  |  |  |  |
Goodwill [Roll Forward] |  |  |  |  |
December 31, 2019 | [2] |  |  | 1,013.9 |
Purchase accounting adjustments | [2] |  |  | 0.0 |
Business acquisitions | [2] |  |  | 0.0 |
Business divestitures | [2] |  |  | 0.0 |
Impairments |  | (202.4) | [2] | (202.4) |
Currency translation adjustments | [2] |  |  | (0.4) |
September 26, 2020 | [2] | 811.1 |  | 811.1 |
Accumulated impairments |  | $ 311.6 |  | $ 311.6 | $ 109.2
[1] | We had accumulated goodwill impairments of $868.4 million as of each of December 31, 2019 and September 26, 2020.
[2] | We had accumulated goodwill impairments of $109.2 million and $311.6 million as of December 31, 2019 and September 26, 2020

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