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Goodwill and Intangible Assets
3 Months Ended
Mar. 31, 2015
Goodwill and Intangible Assets [Abstract]  
Goodwill and Intangible Assets [Text Block]
GOODWILL AND INTANGIBLE ASSETS

The following table summarizes changes to goodwill by business segment for the three months ended March 31, 2015:
 
 
 
Investments and Other

Millions
 
Balance as of December 31, 2014

$2.9

Acquired Goodwill
127.1

Balance as of March 31, 2015

$130.0



Balances of intangible assets, net, excluding goodwill as of March 31, 2015 are as follows:
 
December 31,
2014

 
Additions as a Result of Acquisitions
 
 Amortization
 
March 31,
2015

Millions
 
 
 
 
 
 
 
Intangible Assets
 
 
 
 
 
 
 
Definite-Lived Intangible Assets
 
 
 
 
 
 
 
Customer Relationships

 

$60.1

 
$0.5
 

$59.6

Developed Technology and Other (a)

$1.9

 
6.3

 
0.1

 
8.1

Total Definite-Lived Intangible Assets
1.9

 
66.4

 
0.6

 
67.7

Indefinite-Lived Intangible Assets
 
 
 
 
 
 
 
Trademarks and Trade Names

 
16.6

 
n/a

 
16.6

Total Intangible Assets

$1.9

 

$83.0

 
$0.6
 

$84.3

(a)
Developed Technology and Other includes patents, non-compete agreements, and land easements.

Customer relationships have a useful life of approximately 23 years and developed technology and other have useful lives ranging from less than 1 year to approximately 14 years (weighted average of approximately 9 years). The weighted average useful life of all definite-lived intangible assets as of March 31, 2015 is approximately 21 years.

Amortization expense of intangible assets for the three months ended March 31, 2015 was $0.6 million.

The estimated amortization expense for definite-lived intangible assets for the remainder of 2015 is $3.6 million. Estimated annual amortization expense for definite-lived intangible assets is $4.3 million in 2016, $4.2 million in 2017, $4.1 million in 2018, $4.0 million in 2019, $3.9 million in 2020 and $43.6 million thereafter.