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Goodwill and Other Intangible Assets (Tables)
3 Months Ended
Mar. 31, 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 the three months ended March 31, 2018, are as follows:
(Amounts in millions)
Commercial
& Industrial
Group
 
Snap-on
Tools Group
 
Repair Systems
& Information
Group
 
Total
Balance as of December 30, 2017
$
298.4

 
$
12.5

 
$
613.2

 
$
924.1

Currency translation
8.3

 

 
3.2

 
11.5

Acquisitions and related adjustments
5.8

 

 

 
5.8

Balance as of March 31, 2018
$
312.5

 
$
12.5

 
$
616.4

 
$
941.4

Other Intangible Assets by Major Class
Additional disclosures related to other intangible assets are as follows:
 
March 31, 2018
 
December 30, 2017
(Amounts in millions)
Gross Carrying
Value
 
Accumulated
Amortization
 
Gross Carrying
Value
 
Accumulated
Amortization
Amortized other intangible assets:
 
 
 
 
 
 
 
Customer relationships
$
176.5

 
$
(101.7
)
 
$
175.2

 
$
(98.2
)
Developed technology
19.2

 
(18.8
)
 
18.9

 
(18.4
)
Internally developed software
179.3

 
(137.1
)
 
177.0

 
(133.4
)
Patents
34.7

 
(23.1
)
 
34.1

 
(22.7
)
Trademarks
3.0

 
(2.0
)
 
3.0

 
(2.0
)
Other
8.0

 
(2.9
)
 
7.7

 
(2.7
)
Total
420.7

 
(285.6
)
 
415.9

 
(277.4
)
Non-amortized trademarks
116.6

 

 
115.2

 

Total other intangible assets
$
537.3

 
$
(285.6
)
 
$
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
4
Patents
8
Trademarks
6
Other
39