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Goodwill and Other Intangible Assets (Tables) | 12 Months Ended
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Dec. 29, 2018
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 2018 and 2017 are as follows:
(Amounts in millions) |  | Commercial & Industrial Group |  | Snap-on Tools Group |  | Repair Systems & Information Group |  | Total
Balance as of 2016 year end |  | $ | 242.4 |  |  | $ | 12.5 |  |  | $ | 640.6 |  |  | $ | 895.5 |
Currency translation |  | 30.3 |  |  | — |  |  | 15.8 |  |  | 46.1 |
Acquisitions |  | 25.7 |  |  | — |  |  | (43.2 | ) |  | (17.5 | )
Balance as of 2017 year end |  | $ | 298.4 |  |  | $ | 12.5 |  |  | $ | 613.2 |  |  | $ | 924.1 |
Currency translation |  | (16.3 | ) |  | — |  |  | (9.7 | ) |  | (26.0 | )
Acquisitions |  | 4.1 |  |  | — |  |  | — |  |  | 4.1 |
Balance as of 2018 year end |  | $ | 286.2 |  |  | $ | 12.5 |  |  | $ | 603.5 |  |  | $ | 902.2 |
Other Intangible Assets by Major Class | Additional disclosures related to other intangible assets as of 2018 and 2017 year end are as follows:
|  | 2018 |  | 2017
(Amounts in millions) |  | Gross Carrying Value |  | Accumulated Amortization |  | Gross Carrying Value |  | Accumulated Amortization
Amortized other intangible assets: |  |  |  |  |  |  |  |
Customer relationships |  | $ | 172.2 |  |  | $ | (107.6 | ) |  | $ | 175.2 |  |  | $ | (98.2 | )
Developed technology |  | 18.5 |  |  | (18.3 | ) |  | 18.9 |  |  | (18.4 | )
Internally developed software |  | 156.6 |  |  | (116.6 | ) |  | 177.0 |  |  | (133.4 | )
Patents |  | 35.7 |  |  | (22.9 | ) |  | 34.1 |  |  | (22.7 | )
Trademarks |  | 3.2 |  |  | (2.0 | ) |  | 3.0 |  |  | (2.0 | )
Other |  | 7.3 |  |  | (2.9 | ) |  | 7.7 |  |  | (2.7 | )
Total |  | 393.5 |  |  | (270.3 | ) |  | 415.9 |  |  | (277.4 | )
Non-amortized trademarks |  | 109.7 |  |  | — |  |  | 115.2 |  |  | — |
Total other intangible assets |  | $ | 503.2 |  |  | $ | (270.3 | ) |  | $ | 531.1 |  |  | $ | (277.4 | )
Weighted-Average Amortization Period by Major Class | The weighted-average amortization periods related to other intangible assets are as follows:
|  | In Years
Customer relationships |  | 15
Developed technology |  | 3
Internally developed software |  | 5
Patents |  | 8
Trademarks |  | 6
Other |  | 39

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- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13854-109267 + Details
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