Retirement Plans (Amounts In Accumulated Other Comprehensive (Income) Loss) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss (gain)	$ 1,574.3	$ 1,069.4
Net transition obligation	0.2	0.3
Net prior service credit		(43.1)
Total	1,574.5	1,026.6
Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss (gain)	(9.1)	(6.0)
Net transition obligation
Net prior service credit	(87.8)	(27.9)
Total	$ (96.9)	$ (33.9)