Operating Expenses (Tables)

6 Months Ended

Jun. 30, 2012

Operating Expenses [Abstract]

Components of Operating Expenses [Table Text Block]

The components of operating expenses for the three and six months ended June 30, 2012 and 2011 were (in millions):

	Three Months Ended June 30,				Six Months Ended June 30,
	2012		2011		2012		2011
Salary and service costs	$	2,541.3	$	2,472.8	$	4,975.8	$	4,891.1
Office and general expenses	513.3		526.5		1,023.5		937.4
Operating expenses	$	3,054.6	$	2,999.3	$	5,999.3	$	5,828.5