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Employee Benefit Plans (Details 8)	12 Months Ended
Employee Benefit Plans (Details 8)	Dec. 31, 2013	Dec. 31, 2012
Assumed Health Care Cost Trend Rates at Beginning of Year
Health care cost trend rate assumed for next year	6.50%	7.00%
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate)	5.00%	5.00%
Year that the rate reaches the ultimate trend rate	2017	2017

The assumed health care cost trend rate for the next year used to measure the expected cost of benefits covered by the plan (gross eligible charges). This is based upon the annual rate of change in the cost of health care benefits currently provided by the postretirement benefit plan, due to factors other than changes in the composition of the plan population by age and dependency status.

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