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Goodwill and Other Intangible Assets - Purchased Intangible Assets (Details) - USD ($) $ in Millions | Dec. 26, 2021 | Dec. 27, 2020
--- | --- | ---
Acquired finite-lived intangible assets: |  |
Gross Value | $ 155.0 | $ 150.0
Accumulated Amortization | (118.7) | (113.9)
Total | 36.3 | 36.1
Total intangible assets, Gross Value | 161.9 | 156.9
Total intangible assets, Net Value | 43.2 | 43.0
Trade names |  |
Acquired finite-lived intangible assets: |  |
Indefinite-lived trade names | 6.9 | 6.9
Customer relationships |  |
Acquired finite-lived intangible assets: |  |
Gross Value | 76.5 | 75.3
Accumulated Amortization | (57.6) | (55.7)
Total | 18.9 | 19.6
Contracts and backlog |  |
Acquired finite-lived intangible assets: |  |
Gross Value | 34.9 | 33.4
Accumulated Amortization | (33.1) | (31.0)
Total | 1.8 | 2.4
Developed technology and technical know-how |  |
Acquired finite-lived intangible assets: |  |
Gross Value | 31.4 | 29.9
Accumulated Amortization | (25.8) | (25.3)
Total | 5.6 | 4.6
Trade names |  |
Acquired finite-lived intangible assets: |  |
Gross Value | 2.7 | 2.0
Accumulated Amortization | (2.0) | (1.9)
Total | 0.7 | 0.1
In-process research and development |  |
Acquired finite-lived intangible assets: |  |
Gross Value | 9.5 | 9.4
Accumulated Amortization | (0.2) | 0.0
Total | $ 9.3 | $ 9.4

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