Pensions And Other Employee Benefits Plans (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Defined Benefit Plan Disclosure [Line Items]
Funded status at end of period	$ 43,300,000
Unfunded benefit obligations, discount rate	4.00%	4.75%	5.50%
Termination Date SERP	Dec. 31, 2012
Period over which payments to participants of SERP will be made	December 16, 2013 and December 31, 2013
Unfunded benefit obligations, decrease in discount rate	0.50%
Future SERP payment included in current liabilities	18,100,000
Change in unfunded benefit obligation as a result of decrease in half percentage point assumed discount rate	3,500,000	36,500,000
Accumulated pension benefit obligation	60,000,000	530,000,000
Pensions and other employee benefits related to discontinued operations		278,600,000
Expected return on plan assets	8.00%	8.00%	8.00%
Expected long-term rate of return on plan assets	7.25%
Health care cost trend rate	9.50%	9.00%
Health care cost trend rate, year	2021	2019
Ultimate health care cost trend rate	5.00%	5.00%
Supplemental retirement plan assets held in trust, current		800,000
Employee Savings (401K) Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Employer contributions to employee savings (401K) plan	6.00%
Participant's base salary rate	66.70%
Employer contributions	10,400,000	11,500,000	10,000,000
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated actuarial loss to be amortized from accumulated other comprehensive income over next fiscal year	6,000,000
Contribution to qualified pension plan	34,700,000
Estimated employer contribution next fiscal year	2,600,000
Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Contribution to qualified pension plan	1,000,000
Supplemental Employee Retirement Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Unfunded benefit obligations, discount rate	0.60%
Contribution to qualified pension plan	1,200,000
Estimated employer contribution next fiscal year	1,000,000
Estimated lump sum payments related to the SERP termination	$ 17,500,000