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Goodwill and Other Intangible Assets (Tables)
 3 Months Ended
Mar. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Intangible Assets and Goodwill
The following table shows the change in goodwill and other intangible assets:
 
 
Three Months Ended March 31,
Millions
 
2015
 
2014
 
 
Goodwill
 
Other intangible assets
 
Goodwill
 
Other intangible assets
Beginning balance
 
$
168.9

 
$
197.5

 
$
—

 
$
20.7

Acquisitions of businesses
 
.3

 
2.8

 
23.8

 
42.4

Dispositions of businesses
 
—

 
—

 
—

 
(.4
)
Amortization, including foreign currency translation
 
—

 
(6.9
)
 
—

 
(.3
)
Ending balance
 
$
169.2

 
$
193.4

 
$
23.8

 
$
62.4