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Goodwill and Other Intangible Assets - Goodwill (Details) - USD ($) $ in Millions | Dec. 26, 2021 | Dec. 27, 2020
--- | --- | ---
Goodwill [Line Items] |  |
Gross value | $ 747.2 | $ 737.2
Less accumulated impairment | 253.3 | 253.3
Net | 493.9 | 483.9
US |  |
Goodwill [Line Items] |  |
Gross value | 127.9 | 127.6
Less accumulated impairment | 13.8 | 13.8
Net | 114.1 | 113.8
KGS |  |
Goodwill [Line Items] |  |
Gross value | 619.3 | 609.6
Less accumulated impairment | 239.5 | 239.5
Net | $ 379.8 | $ 370.1

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