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9. Other Income and Expenses (Tables)
 6 Months Ended
Jun. 30, 2012
Other Income and Expenses [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,
 
2012
 
2011
 
2012
 
2011
Interest and investment income
$
(5.9
)
 
$
(4.9
)
 
$
(6.9
)
 
$
(5.6
)
Net realized (gains) losses on investments
(1.0
)
 
0.1

 
(7.4
)
 
(0.2
)
Miscellaneous other expense items
0.2

 
0.4

 
1.1

 
0.4

Other (income) expense, net
$
(6.7
)
 
$
(4.4
)
 
$
(13.2
)
 
$
(5.4
)