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Interest and Other Nonoperating Income (Expense) (Tables)
 12 Months Ended
Dec. 31, 2015
Interest and Other Income [Abstract]  
Schedule of Other Nonoperating Income (Expense)
Interest and Other Nonoperating Income (Expense)

 
Years Ended December 31,
(In millions)
2015
 
2014
 
2013
 
 
 
 
 
 
Interest income
$
3.3

 
3.0

 
2.7

Gain on available-for-sale securities
1.1

 
0.4

 
0.4

Foreign currency hedge losses
(0.5
)
 
(1.0
)
 
(1.0
)
Other
(0.5
)
 
(0.5
)
 
(0.6
)
Total
$
3.4

 
1.9

 
1.5