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8. Other Income and Expenses (Tables)
 6 Months Ended
Jun. 30, 2011
Other Income and Expense [Abstract]  
Schedule of other income (expense), net
Other (income) expense, net includes the following components (in millions):


 
Three Months Ended
 
Six Months Ended
 
June 30,
 
June 30,
 
2011
 
2010
 
2011
 
2010
 
 
 
 
 
 
 
 
Interest and investment income
$
(4.9
)
 
$
(2.8
)
 
$
(5.6
)
 
$
(3.6
)
Net realized losses (gains) on investments
0.1


 
—


 
(0.2
)
 
(0.3
)
Miscellaneous other (income) expense items
0.4


 
0.3


 
0.4


 
0.6


Other (income) expense, net
$
(4.4
)
 
$
(2.5
)
 
$
(5.4
)
 
$
(3.3
)