Pension And Other Postretirement Benefit Plans (Weighted Average Assumptions Used In Determining Pension Plan Information) (Details)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Net Cost [Abstract]
Discount rate	5.15%	5.62%	6.32%
Expected return on plan assets	7.93%	8.15%	8.10%
Rate of compensation increase	4.34%	4.35%	4.27%
Benefit Obligation [Abstract]
Discount rate	4.73%	5.15%	5.62%
Rate of compensation increase	3.76%	4.34%	4.35%