Inventories (Tables)

6 Months Ended

Jun. 30, 2019

Inventory Disclosure [Abstract]

Summary Of 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