Postretirement Benefits (Weighted Average Assumptions For Post-Retirement Benefit Plans Other Than Pensions) (Details) (Other Benefits [Member])	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefit Obligations, Discount Rate	5.09%	5.77%
Benefit Obligations, Rate of Compensation Increase	3.50%	4.50%
Periodic Benefit Cost, Discount Rate	5.77%	6.60%	6.60%
Periodic Benefit Cost, Rate of Compensation Increase	4.50%	4.50%	4.50%