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10. Other Income and Expenses (Tables)
 12 Months Ended
Dec. 31, 2014
Other Income and Expense [Abstract]  
Schedule of other income (expense), net
Other (income) expense, net includes the following components (in millions):
 
 
Year Ended December 31,
 
 
2014
 
2013
 
2012
 
 
 
 
 
 
 
Interest and investment income
 
$
(13.5
)
 
$
(13.4
)
 
$
(11.4
)
Net realized losses (gains) on investments
 
—

 
0.3

 
(8.7
)
Other-than-temporary impairment losses on investments
 
0.4

 
0.3

 
1.0

Losses (gains) on disposal of property, plant and equipment
 
0.4

 
0.5

 
(3.8
)
Miscellaneous other (income) expense items, net
 
(0.3
)
 
(0.5
)
 
1.0

Other (income) expense, net
 
$
(13.0
)
 
$
(12.8
)
 
$
(21.9
)