CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement of Comprehensive Income [Abstract]
Net Income (Loss)	$ (8,277)	$ 4,290	$ (4,696)	$ 6,932
Currency translation adjustment	7	5	(12)	1
Unrealized holding gain (loss) on securities
Net gain (loss) arising during period	(1)	1	(4)	0
Derivatives
Net derivatives loss on hedge transactions	0	(1)	0	(1)
Reclassification to net income of net realized gain	0	0	0	0
Income taxes on derivatives transactions	0	0	0	0
Total	0	(1)	0	(1)
Actuarial gain (loss)
Amortization to net income of net actuarial loss and settlements	169	125	335	250
Actuarial gain (loss) arising during period	0	(1)	0	(4)
Prior service credits (cost)
Amortization to net income of net prior service costs and curtailments	(5)	(3)	(8)	(7)
Prior service (costs) credits arising during period	0	1	0	1
Defined benefit plans sponsored by equity affiliates - benefit (cost)	7	3	9	5
Income (taxes) benefit on defined benefit plans	(43)	(28)	(80)	(58)
Total	128	97	256	187
Other Comprehensive Gain (Loss), Net of Tax	134	102	240	187
Comprehensive Income (Loss)	(8,143)	4,392	(4,456)	7,119
Comprehensive income (loss) attributable to noncontrolling interests	7	15	25	22
Comprehensive Income (Loss) Attributable to Chevron Corporation	$ (8,136)	$ 4,407	$ (4,431)	$ 7,141