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Business Combinations (Tables)
 12 Months Ended
Dec. 31, 2016
Business Combinations [Abstract]  
Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination
The fair value of the intangible assets acquired during the year ended December 31, 2016, including their estimated useful lives and valuation methodology are as follows:
(in millions)
 
Fair Value
 
Useful Life
 
Valuation Method
Customer relationships
 
$
17.7

 
8-20
 
Multi-period excess earnings
Patents, technology and other
 
19.6

 
7-20
 
Relief-from-royalty; lost income method
Indefinite-lived trade names
 
4.0

 
N/A
 
Relief-from-royalty
Total
 
$
41.3