Retirement Benefits (Reconciliation Of The Benefit Obligation) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Pension Benefits [Member]
Reconciliation of benefit obligation
Benefit obligation at beginning of year	$ 1,948.5	$ 1,851.3
Service cost	14.2	16.4	17.3
Interest cost	67.8	76.4	84.7
Actuarial loss (gain)	(129.9)	129.6
Benefits paid	(135.9)	(125.2)
Benefit obligation at end of year	1,764.7	1,948.5	1,851.3
Other Benefits [Member]
Reconciliation of benefit obligation
Benefit obligation at beginning of year	623.0	651.3
Service cost	6.7	6.8	6.3
Interest cost	22.4	27.5	31.4
Actuarial loss (gain)	4.8	(28.4)
Benefits paid	(49.4)	(34.2)
Benefit obligation at end of year	$ 607.5	$ 623.0	$ 651.3