Other Financial Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Business Acquisition [Line Items]
Gains on sale of nonstrategic properties	$ 785,000,000	$ 765,000,000	$ 1,500,000,000
Loss on extinguishment of debt	260,000,000
Goodwill	4,385,000,000	4,402,000,000
Total financing interest and debt costs	775,000,000	735,000,000	817,000,000
Less: Capitalized interest	63,000,000	38,000,000	19,000,000
Interest and debt expense	712,000,000	697,000,000	798,000,000
Research and development expenses	268,000,000	435,000,000	500,000,000
Excess of replacement cost over the carrying value of inventories (LIFO method)	5,588,000,000	2,749,000,000	4,513,000,000
LIFO profits (losses) on inventory drawdowns included in earnings	35,000,000	(147,000,000)	(9,000,000)
Foreign currency effects	306,000,000	(645,000,000)	(304,000,000)
Company share of equity affiliates foreign currency effects	180,000,000	(152,000,000)	(28,000,000)
Downstream
Business Acquisition [Line Items]
Gains on sale of nonstrategic properties	30,000,000	30,000,000	50,000,000
Loss on extinguishment of debt	110,000,000
Upstream
Business Acquisition [Line Items]
Gains on sale of nonstrategic properties	755,000,000	735,000,000	1,450,000,000
Gain (loss) for impairments and other assets write-offs	519,000,000	$ 4,800,000,000	$ 10,400,000,000
Loss on extinguishment of debt	120,000,000
Unocal | Upstream
Business Acquisition [Line Items]
Goodwill	4,385,000,000
Goodwill impairment loss	$ 0