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Goodwill and Intangibles - Goodwill (Details) $ in Millions | 9 Months Ended | 12 Months Ended | 21 Months Ended
--- | --- | --- | ---
Sep. 26, 2021 USD ($) item | Dec. 31, 2020 USD ($) | Sep. 26, 2021 USD ($) item
Gross Balance |  |  |
Balance at the beginning of the period | $ 769.5 | $ 748.2 | $ 748.2
Acquired During the Period |  | 9.4 |
Foreign Currency Translation and Other | (5.9) | 11.9 |
Balance at the end of the period | 763.6 | 769.5 | 763.6
Accumulated Impairment Losses |  |  |
Balance at the beginning of the period | (167.1) | (167.1) | (167.1)
Balance at the end of the period | (167.1) | (167.1) | (167.1)
Net Goodwill | $ 596.5 | 602.4 | $ 596.5
Number of reporting units | item | 7 |  | 7
Americas |  |  |
Gross Balance |  |  |
Balance at the beginning of the period | $ 482.5 | 476.8 | $ 476.8
Acquired During the Period |  | 5.5 |
Foreign Currency Translation and Other |  | 0.2 |
Balance at the end of the period | 482.5 | 482.5 | 482.5
Accumulated Impairment Losses |  |  |
Balance at the beginning of the period | (24.5) | (24.5) | (24.5)
Balance at the end of the period | (24.5) | (24.5) | (24.5)
Net Goodwill | 458.0 | 458.0 | 458.0
Europe |  |  |
Gross Balance |  |  |
Balance at the beginning of the period | 252.1 | 241.4 | 241.4
Foreign Currency Translation and Other | (5.4) | 10.7 |
Balance at the end of the period | 246.7 | 252.1 | 246.7
Accumulated Impairment Losses |  |  |
Balance at the beginning of the period | (129.7) | (129.7) | (129.7)
Balance at the end of the period | (129.7) | (129.7) | (129.7)
Net Goodwill | 117.0 | 122.4 | 117.0
APMEA |  |  |
Gross Balance |  |  |
Balance at the beginning of the period | 34.9 | 30.0 | 30.0
Acquired During the Period |  | 3.9 |
Foreign Currency Translation and Other | (0.5) | 1.0 |
Balance at the end of the period | 34.4 | 34.9 | 34.4
Accumulated Impairment Losses |  |  |
Balance at the beginning of the period | (12.9) | (12.9) | (12.9)
Balance at the end of the period | (12.9) | (12.9) | (12.9)
Net Goodwill | $ 21.5 | $ 22.0 | $ 21.5

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