CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net Income (Loss)	$ (209)	$ 2,580	$ (4,905)	$ 9,512
Currency translation adjustment	17	(33)	5	(32)
Unrealized holding gain (loss) on securities
Net gain (loss) arising during period	(1)	2	(5)	2
Derivatives
Net derivatives loss on hedge transactions	0	0	0	(1)
Reclassification to net income of net realized gain	0	0	0	0
Income taxes on derivatives transactions	0	3	0	3
Total	0	3	0	2
Actuarial gain (loss)
Amortization to net income of net actuarial loss and settlements	293	150	628	400
Actuarial gain (loss) arising during period	0	0	0	(4)
Prior service credits (cost)
Amortization to net income of net prior service costs and curtailments	(5)	(4)	(13)	(11)
Prior service (costs) credits arising during period	0	0	0	1
Defined benefit plans sponsored by equity affiliates - benefit (cost)	5	3	14	8
Income (taxes) benefit on defined benefit plans	(66)	(33)	(146)	(91)
Total	227	116	483	303
Other Comprehensive Gain (Loss), Net of Tax	243	88	483	275
Comprehensive Income (Loss)	34	2,668	(4,422)	9,787
Comprehensive loss (income) attributable to noncontrolling interests	2	0	27	22
Comprehensive Income (Loss) Attributable to Chevron Corporation	$ 36	$ 2,668	$ (4,395)	$ 9,809