Retirement Benefits (Components Of Net Periodic Benefit (Credit) Cost) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Document Fiscal Year Focus	2014
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 3.3	$ 3.6
Interest cost	18.5	16.7
Expected return on assets	(34.4)	(33.3)
Recognized actuarial loss	5.3	8.6
Settlement loss	1.1	3.4
Amortization of prior service credit	(0.2)	(0.2)
Net periodic (credit) benefit cost	(6.4)	(1.2)
Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	0.8	1.6
Interest cost	6.6	5.6
Expected return on assets	(5.8)	(5.5)
Recognized actuarial loss	2.3	2.8
Settlement loss	0	0
Amortization of prior service credit	(3.6)	(3.3)
Net periodic (credit) benefit cost	$ 0.3	$ 1.2