Restructuring Activities (Restructuring Activities Change In Strategic Activity Related To Liabilities) (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2013
2011 Restructuring Activities [Member]
Restructuring Reserve [Roll Forward]
Liability for restructuring activities, ending balance	$ 18.8
2011 Restructuring Activities [Member] | Employee Termination Costs [Member]
Restructuring Reserve [Roll Forward]
Liability for restructuring activities, ending balance	2.4
Expiration date range end	2013
2011 Restructuring Activities [Member] | Lease And Other Contract Exit Costs [Member]
Restructuring Reserve [Roll Forward]
Liability for restructuring activities, ending balance	16.4
2012 Restructuring Activities [Member]
Restructuring Reserve [Roll Forward]
Liability for restructuring activities, ending balance	49.6
2012 Restructuring Activities [Member] | Commercial and Specialty Business [Member]
Restructuring Reserve [Roll Forward]
Liability for restructuring activities, ending balance	26.8
2012 Restructuring Activities [Member] | Government Business [Member]
Restructuring Reserve [Roll Forward]
Liability for restructuring activities, ending balance	21.7
2012 Restructuring Activities [Member] | Other [Member]
Restructuring Reserve [Roll Forward]
Liability for restructuring activities, ending balance	1.1
2012 Restructuring Activities [Member] | Employee Termination Costs [Member]
Restructuring Reserve [Roll Forward]
Liability for restructuring activities, beginning balance	117.6
Payments	(64.1)
Liability released	(7.9)
Liability for restructuring activities, ending balance	45.6
2012 Restructuring Activities [Member] | Employee Termination Costs [Member] | Commercial and Specialty Business [Member]
Restructuring Reserve [Roll Forward]
Liability for restructuring activities, beginning balance	60.0
Payments	(30.2)
Liability released	(6.1)
Liability for restructuring activities, ending balance	23.7
2012 Restructuring Activities [Member] | Employee Termination Costs [Member] | Government Business [Member]
Restructuring Reserve [Roll Forward]
Liability for restructuring activities, beginning balance	54.7
Payments	(32.4)
Liability released	(1.6)
Liability for restructuring activities, ending balance	20.7
2012 Restructuring Activities [Member] | Employee Termination Costs [Member] | Other [Member]
Restructuring Reserve [Roll Forward]
Liability for restructuring activities, beginning balance	2.9
Payments	(1.5)
Liability released	(0.2)
Liability for restructuring activities, ending balance	1.2
2012 Restructuring Activities [Member] | Lease And Other Contract Exit Costs [Member]
Restructuring Reserve [Roll Forward]
Liability for restructuring activities, beginning balance	11.8
Payments	(7.0)
Liability released	(0.8)
Liability for restructuring activities, ending balance	4.0
2012 Restructuring Activities [Member] | Lease And Other Contract Exit Costs [Member] | Commercial and Specialty Business [Member]
Restructuring Reserve [Roll Forward]
Liability for restructuring activities, beginning balance	8.8
Payments	(5.1)
Liability released	(0.6)
Liability for restructuring activities, ending balance	3.1
2012 Restructuring Activities [Member] | Lease And Other Contract Exit Costs [Member] | Government Business [Member]
Restructuring Reserve [Roll Forward]
Liability for restructuring activities, beginning balance	2.9
Payments	(1.7)
Liability released	(0.2)
Liability for restructuring activities, ending balance	1.0
2012 Restructuring Activities [Member] | Lease And Other Contract Exit Costs [Member] | Other [Member]
Restructuring Reserve [Roll Forward]
Liability for restructuring activities, beginning balance	0.1
Payments	(0.2)
Liability released	0
Liability for restructuring activities, ending balance	$ (0.1)