Inventories

6 Months Ended

Jun. 30, 2019

Inventory Disclosure [Abstract]

Inventories

INVENTORIES

(In millions)	June 30, 2019		December 31, 2018
Crude oil and refinery feedstocks	$	3,468	$	3,655
Refined products	4,601		5,234
Materials and supplies	801		720
Merchandise	218		228
Total	$	9,088	$	9,837

Inventories are carried at the lower of cost or market value. The cost of inventories of crude oil and refinery feedstocks, refined products and merchandise is determined primarily under the LIFO method. There were no LIFO inventory liquidations recognized for the six months ended June 30, 2019.