Pension And Other Postretirement Benefit Plans (Defined Benefit Pension Plans - Amounts Recognized In Accumulated Other Comprehensive Loss) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Net loss	$ 38.9	$ (2.6)
Defined Benefit Pension Plans [Member]
Net loss	165.7	132.3
Prior service credit	(5.4)	(2.7)
Before tax amount	160.3	129.6
After tax amount	$ 104.2	$ 83.1