XML 52 R26.htm IDEA: XBRL DOCUMENT v3.10.0.1
Inventories (Tables)
 9 Months Ended
Sep. 30, 2018
Inventory, Net [Abstract]  
Schedule of Inventory
The following table summarizes our inventory for the periods presented:
Millions of dollars

September 30, 2018

December 31, 2017
Finished products

$
2,385


$
2,374

Raw materials and work in process

624


725



3,009


3,099

Less: excess of FIFO cost over LIFO cost

(136
)

(111
)
Total inventories

$
2,873


$
2,988