Employee Benefit Plans (Schedule Of Components Of Pension Cost) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Curtailment (benefit) loss recognized during the period		$ 0
Amortization and deferrals - net		0
Pension Plans, Defined Benefit [Member]
Service cost	2.1	1.0	3.5	1.9
Interest cost on projected benefit obligation	2.9	3.0	5.9	6.0
Expected return on plan assets	(2.9)	(2.8)	(5.9)	(5.6)
Curtailment (benefit) loss recognized during the period	(0.2)	0	(0.2)	0
Amortization and deferrals - net	2.8	1.7	5.6	3.5
Pension cost	4.7	2.9	8.9	5.8
Unfunded Executive Pension Plans [Member]
Service cost	0	0.2	0.1	0.3
Interest cost on projected benefit obligation	0.2	0.3	0.4	0.7
Curtailment (benefit) loss recognized during the period	(0.2)		(0.2)	(1.5)
Amortization and deferrals - net	(0.1)		(0.1)	0
Pension cost	$ (0.1)	$ 0.5	$ 0.2	$ (0.5)