Retirement Benefits (Components Of Net Periodic Benefit (Credit) Cost) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 3.2	$ 3.5	$ 9.7	$ 10.8
Interest cost	18.5	17.2	55.5	50.6
Expected return on assets	(34.4)	(33.2)	(103.1)	(99.8)
Recognized actuarial loss	5.3	6.1	15.8	23.2
Settlement loss	1.3	2.6	3.8	9.7
Amortization of prior service credit	(0.2)	(0.2)	(0.6)	(0.6)
Net periodic (credit) benefit cost	(6.3)	(4.0)	(18.9)	(6.1)
Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	0.8	1.6	2.4	5.0
Interest cost	6.6	5.6	19.7	16.8
Expected return on assets	(5.8)	(5.5)	(17.5)	(16.5)
Recognized actuarial loss	2.3	2.8	7.0	8.4
Settlement loss	0	0	0	0
Amortization of prior service credit	(3.6)	(3.3)	(10.8)	(10.0)
Net periodic (credit) benefit cost	$ 0.3	$ 1.2	$ 0.8	$ 3.7