Inventories (Tables)

3 Months Ended

Mar. 31, 2020

Inventory Disclosure [Abstract]

Summary Of Inventories

(In millions)	March 31, 2020			December 31, 2019
Crude oil	$	3,717		$	3,472
Refined products	5,700			5,548
Materials and supplies	1,000			996
Merchandise	248			227
Inventories before LCM inventory valuation reserve	10,665			10,243
LCM inventory valuation reserve	(3,220		)	—
Total	$	7,445		$	10,243