Restructuring (2011 Restructuring) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Restructuring charges	$ 0	$ 0	$ 0	$ 17.6
2011 Restructuring Plan [Member] | Severance Charge [Member]
Restructuring charges			2.8
2011 Restructuring Plan [Member] | Severance Charge [Member] | Information Management [Member]
Restructuring charges			1.6
2011 Restructuring Plan [Member] | Severance Charge [Member] | Customer Management [Member]
Restructuring charges			1.0
2011 Restructuring Plan [Member] | Severance Charge [Member] | Corporate [Member]
Restructuring charges			0.2
2011 Restructuring Plan [Member] | Facility Charge [Member] | Information Management [Member]
Restructuring reserve accrual adjustment			2.8
Facility Charge [Member]
Restructuring liability, beginning balance			20.7
Restructuring liability payment			(6.9)
Restructuring reserve accrual adjustment			(2.8)
Restructuring liability, ending balance	11.0		11.0
Information Management [Member]
Restructuring charges	(1.2)	0	(1.2)	0
Customer Management [Member]
Restructuring charges	1.0	0	1.0	15.3
2011 Restructuring Plan [Member] | Professional Employees [Member]
Employees affected			100
2011 Restructuring Plan [Member]
Restructuring liability, beginning balance			0
Restructuring charges			2.8
Restructuring liability payment			0.9
Restructuring liability, ending balance	$ 1.9		$ 1.9