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Goodwill and Other Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract] |
Changes in Carrying Amount of Goodwill by Segment | The changes in the carrying amount of goodwill by segment for 2022 and 2021 are as follows:
(Amounts in millions) |  | Commercial & Industrial Group |  | Snap-on Tools Group |  | Repair Systems & Information Group |  | Total
Balance as of 2020 year end |  | $ | 331.2 |  |  | $ | 12.4 |  |  | $ | 638.8 |  |  | $ | 982.4 |
Currency translation |  | (19.4) |  |  | — |  |  | (11.3) |  |  | (30.7) |
Acquisition adjustments |  | 14.0 |  |  | — |  |  | 150.8 |  |  | 164.8 |
Balance as of 2021 year end |  | $ | 325.8 |  |  | $ | 12.4 |  |  | $ | 778.3 |  |  | $ | 1,116.5 |
Currency translation |  | (22.4) |  |  | — |  |  | (15.7) |  |  | (38.1) |
Acquisition adjustments |  | (0.5) |  |  | — |  |  | (32.6) |  |  | (33.1) |
Balance as of 2022 year end |  | $ | 302.9 |  |  | $ | 12.4 |  |  | $ | 730.0 |  |  | $ | 1,045.3 |
Other Intangible Assets by Major Class | Additional disclosures related to other intangible assets as of 2022 and 2021 year end are as follows:
|  | 2022 |  | 2021
(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 |  | $ | 212.1 |  |  | $ | (150.8) |  |  | $ | 61.3 |  |  | $ | 217.8 |  |  | $ | (142.1) |  |  | $ | 75.7 |
Developed technology |  | 35.8 |  |  | (26.0) |  |  | 9.8 |  |  | 36.6 |  |  | (23.2) |  |  | 13.4 |
Internally developed software |  | 179.6 |  |  | (137.2) |  |  | 42.4 |  |  | 182.7 |  |  | (139.1) |  |  | 43.6 |
Patents |  | 48.4 |  |  | (25.6) |  |  | 22.8 |  |  | 45.7 |  |  | (25.1) |  |  | 20.6 |
Trademarks |  | 3.9 |  |  | (2.4) |  |  | 1.5 |  |  | 3.9 |  |  | (2.3) |  |  | 1.6 |
Other |  | 7.7 |  |  | (4.0) |  |  | 3.7 |  |  | 8.3 |  |  | (4.1) |  |  | 4.2 |
Total |  | 487.5 |  |  | (346.0) |  |  | 141.5 |  |  | 495.0 |  |  | (335.9) |  |  | 159.1 |
Non-amortized trademarks |  | 134.1 |  |  | — |  |  | 134.1 |  |  | 142.6 |  |  | — |  |  | 142.6 |
Total other intangible assets |  | $ | 621.6 |  |  | $ | (346.0) |  |  | $ | 275.6 |  |  | $ | 637.6 |  |  | $ | (335.9) |  |  | $ | 301.7 |
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 |  | 14
Trademarks |  | 9
Other |  | 39

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