Other Post Retirement Employee Benefit Plans (Components Of Net Periodic Benefit Cost) (Details) (Other Post-Retirement Benefits, USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Other Post-Retirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 1.9	$ 1.6
Interest cost	11.0	9.5
Amortization of loss	2.8	4.0
Amortization of prior service credit	(5.7)	(5.9)
Curtailment loss	0	3.0
Net periodic pension cost	$ 10.0	$ 12.2