Pension, Savings Plan and Other Benefits Schedule of Weighted-Average Assumptions Used in Net Periodic Pension Cost (Details)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Pension Plans [Member]
Discount rate	4.25%	5.00%	5.50%
Expected return on plan assets	6.00%	8.00%	8.00%
Other Postretirement Benefit Plans, Defined Benefit [Member]
Discount rate	4.25%	5.25%	5.75%
Rate of compensation increase	5.37%	5.37%	5.37%
Qualified Plan [Member]
Rate of compensation increase	5.37%	5.37%	5.37%
Non-Qualified [Member]
Rate of compensation increase	5.00%	5.00%	5.00%