Restructuring (Schedule Of Reconciliation Of Accrued Restructuring Charges) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Accrued Employee Termination Costs Per Contract [Member]
Restructuring Cost and Reserve [Line Items]
Balance, beginning balance	$ 0.7	$ 2.6	$ 1.2
Restructuring charges	5.3	0.5	8.5
Balance, ending balance	1.0	0.7	2.6
Accrued One-Time Employee Termination Costs [Member]
Restructuring Cost and Reserve [Line Items]
Balance, beginning balance		0.3
Restructuring charges	0.1	0.6	10.7
Balance, ending balance			0.3
Accrued Total Employee Termination Costs [Member]
Restructuring Cost and Reserve [Line Items]
Balance, beginning balance	0.7	2.9	1.2
Restructuring charges	5.4	1.1	19.2
Balance, ending balance	1.0	0.7	2.9
Accrued Other Costs [Member]
Restructuring Cost and Reserve [Line Items]
Balance, beginning balance	1.4		0.1
Restructuring charges	0.5	1.7	1.4
Balance, ending balance	1.0	1.4
Total Accrued Restructuring Charges [Member]
Restructuring Cost and Reserve [Line Items]
Balance, beginning balance	2.1	2.9	1.3
Restructuring charges	5.9	2.8	20.6
Balance, ending balance	2.0	2.1	2.9
2008 Restructuring Plan [Member] | Accrued Employee Termination Costs Per Contract [Member]
Restructuring Cost and Reserve [Line Items]
Utilization of restructuring plan			(1.2)
2008 Restructuring Plan [Member] | Accrued Total Employee Termination Costs [Member]
Restructuring Cost and Reserve [Line Items]
Utilization of restructuring plan			(1.2)
2008 Restructuring Plan [Member] | Total Accrued Restructuring Charges [Member]
Restructuring Cost and Reserve [Line Items]
Utilization of restructuring plan			(1.2)
2009 Restructuring Plan [Member] | Accrued Employee Termination Costs Per Contract [Member]
Restructuring Cost and Reserve [Line Items]
Utilization of restructuring plan		(2.4)	(5.9)
2009 Restructuring Plan [Member] | Accrued One-Time Employee Termination Costs [Member]
Restructuring Cost and Reserve [Line Items]
Utilization of restructuring plan		(0.9)	(10.4)
2009 Restructuring Plan [Member] | Accrued Total Employee Termination Costs [Member]
Restructuring Cost and Reserve [Line Items]
Utilization of restructuring plan		(3.3)	(16.3)
2009 Restructuring Plan [Member] | Accrued Other Costs [Member]
Restructuring Cost and Reserve [Line Items]
Utilization of restructuring plan			(1.5)
2009 Restructuring Plan [Member] | Total Accrued Restructuring Charges [Member]
Restructuring Cost and Reserve [Line Items]
Utilization of restructuring plan		(3.3)	(17.8)
2010 Restructuring Plan [Member] | Accrued Other Costs [Member]
Restructuring Cost and Reserve [Line Items]
Utilization of restructuring plan	(0.4)	(0.3)
2010 Restructuring Plan [Member] | Total Accrued Restructuring Charges [Member]
Restructuring Cost and Reserve [Line Items]
Utilization of restructuring plan	(0.4)	(0.3)
2011 Restructuring Plan [Member] | Accrued Employee Termination Costs Per Contract [Member]
Restructuring Cost and Reserve [Line Items]
Utilization of restructuring plan	(5.0)
2011 Restructuring Plan [Member] | Accrued One-Time Employee Termination Costs [Member]
Restructuring Cost and Reserve [Line Items]
Utilization of restructuring plan	(0.1)
2011 Restructuring Plan [Member] | Accrued Total Employee Termination Costs [Member]
Restructuring Cost and Reserve [Line Items]
Utilization of restructuring plan	(5.1)
2011 Restructuring Plan [Member] | Accrued Other Costs [Member]
Restructuring Cost and Reserve [Line Items]
Utilization of restructuring plan	(0.5)
2011 Restructuring Plan [Member] | Total Accrued Restructuring Charges [Member]
Restructuring Cost and Reserve [Line Items]
Utilization of restructuring plan	$ (5.6)