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Operating Expenses
 9 Months Ended
Sep. 30, 2012
Operating Expenses [Abstract]  
Operating Expenses [Text Block]
Operating Expenses
The components of operating expenses for the three and nine months ended September 30, 2012 and 2011 were (in millions):
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
2012
 
2011
 
2012
 
2011
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Salary and service costs
$
2,515.8

 
$
2,504.7

 
$
7,491.5

 
$
7,395.8

Office and general expenses
503.5

 
502.8

 
1,527.1

 
1,440.1

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Operating expenses
$
3,019.3

 
$
3,007.5

 
$
9,018.6

 
$
8,835.9