XML 50 R26.htm IDEA: XBRL DOCUMENT v3.10.0.1
Inventories (Tables)
 6 Months Ended
Jun. 30, 2018
Inventory, Net [Abstract]  
Schedule of Inventory
The following table summarizes our inventory for the periods presented:
Millions of dollars

June 30, 2018

December 31, 2017
Finished products

$
2,524


$
2,374

Raw materials and work in process

634


725



3,158


3,099

Less: excess of FIFO cost over LIFO cost

(126
)

(111
)
Total inventories

$
3,032


$
2,988