v2.4.0.6
Employee Benefit Plans (Tables)
3 Months Ended
Mar. 31, 2013
Employee Benefit Plans [Abstract]  
Pension and Postretirement Plans
Note 19—Employee Benefit Plans            
             
Pension and Postretirement Plans            
 Millions of Dollars
  Pension Benefits Other Benefits
Three Months EndedMarch 31 March 31
 2013 2012 2013 2012
 U.S. Int’l. U.S. Int’l.    
Components of Net Periodic Benefit Cost            
Service cost$ 35  26  58  28  1  2
Interest cost  36  37  63  43  6  10
Expected return on plan assets  (47)  (41)  (74)  (43)  -  -
Amortization of prior service cost (credit)  1  (2)  2  (2)  (1)  (1)
Recognized net actuarial loss (gain)  38  19  59  18  1  (1)
Net periodic benefit cost$ 63  39  108  44  7  10