Employee Benefit Plans (Net Pension And Postretirement Cost) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 4.6	$ 4.3
Interest cost	9.2	9.8
Expected return on plan assets	(9.8)	(8.9)
Amortization of net actuarial loss	3.0	2.4
Amortization of prior service cost (credit)	0.2	0.2
Net periodic pension or postretirement benefit cost	7.2	7.8
Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	0.1	0.1
Interest cost	0.4	0.4
Amortization of net actuarial loss	0.1	0.1
Amortization of prior service cost (credit)	0	(0.1)
Net periodic pension or postretirement benefit cost	$ 0.6	$ 0.5