XML 102 R84.htm IDEA: XBRL DOCUMENT v2.4.0.8
Employee Benefit Plans (Schedule Of Assumed Health Care Cost Trend) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Employee Benefit Plans [Abstract]      
Effect on postretirement benefit obligation, One-Percentage-Point Increase $ 86    
Effect on postretirement benefit obligation, One-Percentage-Point Decrease (88)    
Effect on service and interest cost, One-Percentage-Point Increase 9    
Effect on service and interest cost, One-Percentage-Point Decrease $ (9)    
Assumed health care cost trend rate 8.00%    
Ultimate trend rate 5.00%    
Year of ultimate trend rate 2020    
Assumed return 6.50% 5.40% 5.50%
10 year actual rate of return 8.70%    
Number of Aa-grade non-callable bonds used to develop the yield curve for rate used 494