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Goodwill and Other Intangible Assets (Tables) | 9 Months Ended
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Sep. 28, 2024
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Changes in Carrying Amount of Goodwill by Segment | The changes in the carrying amount of goodwill by segment for the nine months ended September 28, 2024, are as follows:
(Amounts in millions) | Commercial & Industrial Group |  | Snap-on Tools Group |  | Repair Systems & Information Group |  | Total
Balance as of December 30, 2023 | $ | 346.6 |  |  | $ | 12.4 |  |  | $ | 738.4 |  |  | $ | 1,097.4 |
Currency translation | 1.2 |  |  | — |  |  | 1.2 |  |  | 2.4 |
Acquisition adjustments | (13.2) |  |  | — |  |  | — |  |  | (13.2) |
Balance as of September 28, 2024 | $ | 334.6 |  |  | $ | 12.4 |  |  | $ | 739.6 |  |  | $ | 1,086.6 |
Schedule of Other Intangible Assets by Major Class | Additional disclosures related to other intangible assets are as follows:
| September 28, 2024 |  | December 30, 2023
(Amounts in millions) | Gross Carrying Value |  | Accumulated Amortization |  | Net Carrying Value |  | Gross Carrying Value |  | Accumulated Amortization |  | Net Carrying Value
Amortized other intangible assets: |  |  |  |  |  |  |  |  |  |  |
Customer relationships | $ | 218.0 |  |  | $ | (165.7) |  |  | $ | 52.3 |  |  | $ | 214.5 |  |  | $ | (163.6) |  |  | $ | 50.9 |
Developed technology | 36.6 |  |  | (32.4) |  |  | 4.2 |  |  | 36.2 |  |  | (29.8) |  |  | 6.4 |
Internally developed software | 202.0 |  |  | (156.6) |  |  | 45.4 |  |  | 191.3 |  |  | (148.2) |  |  | 43.1 |
Patents | 48.5 |  |  | (21.2) |  |  | 27.3 |  |  | 53.0 |  |  | (26.8) |  |  | 26.2 |
Trademarks | 3.9 |  |  | (2.5) |  |  | 1.4 |  |  | 4.0 |  |  | (2.5) |  |  | 1.5 |
Other | 6.3 |  |  | (2.9) |  |  | 3.4 |  |  | 6.2 |  |  | (2.8) |  |  | 3.4 |
Total | 515.3 |  |  | (381.3) |  |  | 134.0 |  |  | 505.2 |  |  | (373.7) |  |  | 131.5 |
Non-amortized trademarks | 143.3 |  |  | — |  |  | 143.3 |  |  | 137.4 |  |  | — |  |  | 137.4 |
Total other intangible assets | $ | 658.6 |  |  | $ | (381.3) |  |  | $ | 277.3 |  |  | $ | 642.6 |  |  | $ | (373.7) |  |  | $ | 268.9 |
Schedule of Weighted-Average Amortization Period by Major Class | The weighted-average amortization periods related to other intangible assets are as follows:
| In Years
Customer relationships | 14
Developed technology | 5
Internally developed software | 6
Patents | 15
Trademarks | 9
Other | 39

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