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Retirement Plans, Postretirement And Postemployment Benefits (Schedule Of Assumed Health Care Cost Trend Rate) (Details)
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Retirement Plans, Postretirement And Postemployment Benefits [Abstract]    
Health care cost trend rate assumed for next year 7.50% 8.00%
Rate to which the cost trend rate gradually declines 5.00% 5.00%
Year the rate reaches the ultimate rate 2017 2017