Benefit Plans (Weighted-Average Assumptions to Determine Net Postretirement Cost) (Details) (Postretirement Benefit Plan [Member])	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	3.90%	4.90%	5.50%
Health care cost trend rate	7.50%	8.00%	8.00%