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Income Tax Matters (Tables)
 9 Months Ended
Sep. 30, 2012
Income Tax Disclosure [Abstract]  
Tax Provision
Tax Provision. The provision for incomes taxes, for each period presented, consisted of the following:
 
Quarter Ended
 
Nine Months Ended
 
September 30,
 
September 30,
 
2012
 
2011
 
2012
 
2011
Domestic
$
17.7

 
$
1.6

 
$
45.8

 
$
9.5

Foreign
0.5

 
(1.2
)
 
1.9

 
(0.1
)
Total
$
18.2

 
$
0.4

 
$
47.7

 
$
9.4