Employee Benefit Plans (Assumptions Used For Pension Benefits Accounting) (Details)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Discount rate	5.10%	5.00%	5.50%
Salary increase (graded by age)	4.40%	4.10%	4.50%
Discount rate	5.00%	5.50%	6.50%
Salary increase	4.10%	4.50%	4.50%
Qualified Pension Plans [Member]
Discount rate	5.10%	5.00%	5.50%
Salary increase (graded by age)	4.40%	4.10%	4.50%
Discount rate	5.00%	5.50%	6.50%
Salary increase	4.10%	4.50%	4.50%
Expected long-term rate of return on plan assets	8.25%	8.50%	8.50%
Other Post-Retirement Benefit Plans [Member]
Discount rate	5.10%	5.00%	5.50%
Discount rate	5.00%	5.50%	6.50%
Expected long-term rate of return on plan assets	0.00%	0.00%	0.00%
Assumed tax rate	35.00%	35.00%	35.00%
Minimum [Member] | Other Post-Retirement Benefit Plans [Member]
Expected long-term rate of return on plan assets	5.36%	5.53%	5.53%
Maximum [Member] | Other Post-Retirement Benefit Plans [Member]
Expected long-term rate of return on plan assets	8.25%	8.50%	8.50%