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Goodwill and Identifiable Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Goodwill | The change in the net carrying amount of goodwill was as follows:
(U.S. Dollars presented in millions) |  | Total Goodwill
Balance at December 26, 2021 |  | $ | 926.2 |
2022 translation adjustments |  | (2.0) |
Balance at December 25, 2022 |  | $ | 924.2 |
2023 translation adjustments |  | 0.9 |
Balance at December 31, 2023 |  | $ | 925.1 |
Schedule of Finite-Lived Intangible Assets | The gross carrying value and accumulated amortization by class of intangible assets as of December 31, 2023 and December 25, 2022 were as follows:
|  | As of December 31, 2023 |  | As of December 25, 2022
(U.S. Dollars presented in millions) |  | Gross Carrying Amounts |  | Accumulated Amortization |  | Net Book Value |  | Gross Carrying Amounts |  | Accumulated Amortization |  | Net Book Value
Indefinite-lived tradenames |  | $ | 184.2 |  |  | $ | — |  |  | $ | 184.2 |  |  | $ | 183.1 |  |  | $ | — |  |  | $ | 183.1 |
Amortizable intangible assets |  |  |  |  |  |  |  |  |  |  |  |
Tradenames |  | 10.4 |  |  | (10.4) |  |  | — |  |  | 10.3 |  |  | (10.2) |  |  | 0.1 |
Customer and contractual relationships |  | 363.6 |  |  | (212.3) |  |  | 151.3 |  |  | 362.9 |  |  | (196.8) |  |  | 166.1 |
Patents/proprietary technology |  | 11.0 |  |  | (11.0) |  |  | — |  |  | 11.0 |  |  | (10.5) |  |  | 0.5 |
Total |  | 385.0 |  |  | (233.7) |  |  | 151.3 |  |  | 384.2 |  |  | (217.5) |  |  | 166.7 |
Total identifiable intangibles |  | $ | 569.2 |  |  | $ | (233.7) |  |  | $ | 335.5 |  |  | $ | 567.3 |  |  | $ | (217.5) |  |  | $ | 349.8 |
Schedule of Indefinite-Lived Intangible Assets | The gross carrying value and accumulated amortization by class of intangible assets as of December 31, 2023 and December 25, 2022 were as follows:
|  | As of December 31, 2023 |  | As of December 25, 2022
(U.S. Dollars presented in millions) |  | Gross Carrying Amounts |  | Accumulated Amortization |  | Net Book Value |  | Gross Carrying Amounts |  | Accumulated Amortization |  | Net Book Value
Indefinite-lived tradenames |  | $ | 184.2 |  |  | $ | — |  |  | $ | 184.2 |  |  | $ | 183.1 |  |  | $ | — |  |  | $ | 183.1 |
Amortizable intangible assets |  |  |  |  |  |  |  |  |  |  |  |
Tradenames |  | 10.4 |  |  | (10.4) |  |  | — |  |  | 10.3 |  |  | (10.2) |  |  | 0.1 |
Customer and contractual relationships |  | 363.6 |  |  | (212.3) |  |  | 151.3 |  |  | 362.9 |  |  | (196.8) |  |  | 166.1 |
Patents/proprietary technology |  | 11.0 |  |  | (11.0) |  |  | — |  |  | 11.0 |  |  | (10.5) |  |  | 0.5 |
Total |  | 385.0 |  |  | (233.7) |  |  | 151.3 |  |  | 384.2 |  |  | (217.5) |  |  | 166.7 |
Total identifiable intangibles |  | $ | 569.2 |  |  | $ | (233.7) |  |  | $ | 335.5 |  |  | $ | 567.3 |  |  | $ | (217.5) |  |  | $ | 349.8 |
Schedule Of Finite Lived Assets, Fair Value Assumptions | The significant assumptions used to estimate the fair values of the tradenames impaired during the year ended December 25, 2022 were as follows:
| 2022 |  |
Unobservable Input | Min |  | Max |  | Wtd Avg(a) |  |  |  |  |  |
Discount rate | 11.6 | % |  | 12.6 | % |  | 12.1 | % |  |  |  |  |  |
Royalty rate(b) | 2.5 | % |  | 3.0 | % |  | 2.8 | % |  |  |  |  |  |
Long-term revenue growth rate(c) | 1.0 | % |  | 1.0 | % |  | 1.0 | % |  |  |  |  |  |
a)Weighted by relative fair value of the impaired tradenames. b)Represents estimated percentage of sales a market-participant would pay to license the impaired tradenames. c)Selected long-term revenue growth rate within 10-year projection period of the impaired tradenames.

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