Retirement And Other Employee Benefits (Weighted Average Assumptions Used To Determine Projected Benefit Obligation) (Details)	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Qualified Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.55%	4.09%	4.98%
Nonqualified Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.25%	3.77%	4.64%
Retirement Health Benefits
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.53%	4.07%	4.99%