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Pension and Other Benefits (Schedule of Benefit Obligations In Excess Of Fair Value Of Plan Assets) (Details)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Pension and Other Benefits [Abstract]
Discount rate	4.64%	5.25%	5.75%
Expected long-term rate of return on plan assets	5.50%	5.50%	6.25%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	4.03%	4.64%	5.25%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Expected long-term rate of return on plan assets	5.50%	5.50%	6.25%

An assumption as to the rate of return on plan assets reflecting the average rate of earnings expected on the funds invested or to be invested to provide for the benefits included in the benefit obligation.

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