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Goodwill and Other Intangible Assets (Tables) | 3 Months Ended
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Apr. 02, 2016
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 the three month period ended April 2, 2016, are as follows:
(Amounts in millions) |  | Commercial & Industrial Group |  |  | Snap-on Tools Group |  |  | Repair Systems & Information Group |  |  | Total |
Balance as of January 2, 2016 |  | $ | 253.1 |  |  | $ | 12.5 |  |  | $ | 524.5 |  |  | $ | 790.1 |
Currency translation |  |  | 6.6 |  |  |  | — |  |  |  | 0.4 |  |  |  | 7.0 |
Balance as of April 2, 2016 |  | $ | 259.7 |  |  | $ | 12.5 |  |  | $ | 524.9 |  |  | $ | 797.1 |
Other Intangible Assets by Major Class | Additional disclosures related to other intangible assets are as follows:
|  | April 2, 2016 |  |  | January 2, 2016 |
(Amounts in millions) |  | Gross Carrying Value |  |  | Accumulated Amortization |  |  | Gross Carrying Value |  |  | Accumulated Amortization |
Amortized other intangible assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Customer relationships |  | $ | 145.6 |  |  | $ | (81.5 | ) |  | $ | 146.2 |  |  | $ | (79.7 | )
Developed technology |  |  | 18.7 |  |  |  | (18.7 | ) |  |  | 18.9 |  |  |  | (18.9 | )
Internally developed software |  |  | 159.2 |  |  |  | (109.1 | ) |  |  | 156.0 |  |  |  | (105.6 | )
Patents |  |  | 30.7 |  |  |  | (21.4 | ) |  |  | 30.1 |  |  |  | (20.9 | )
Trademarks |  |  | 2.7 |  |  |  | (1.8 | ) |  |  | 2.6 |  |  |  | (1.7 | )
Other |  |  | 7.7 |  |  |  | (2.1 | ) |  |  | 7.6 |  |  |  | (1.9 | )
Total |  |  | 364.6 |  |  |  | (234.6 | ) |  |  | 361.4 |  |  |  | (228.7 | )
Non-amortized trademarks |  |  | 62.9 |  |  |  | — |  |  |  | 62.3 |  |  |  | — |
Total other intangible assets |  | $ | 427.5 |  |  | $ | (234.6 | ) |  | $ | 423.7 |  |  | $ | (228.7 | )
Weighted-Average Amortization Period by Major Class | The weighted-average amortization periods related to other intangible assets are as follows:
|  | In Years |
Customer relationships |  |  | 15 |
Internally developed software |  |  | 3 |
Patents |  |  | 9 |
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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13854-109267 + Details
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