CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement of Comprehensive Income [Abstract]
Net Income	$ 4,290	$ 3,422	$ 6,932	$ 7,081
Currency translation adjustment	5	(20)	1	(10)
Unrealized holding gain (loss) on securities:
Net gain (loss) arising during period	1	(6)	0	(7)
Derivatives:
Net derivatives loss on hedge transactions	(1)	0	(1)	0
Actuarial gain (loss):
Amortization to net income of net actuarial and settlement losses	125	151	250	308
Actuarial gain (loss) arising during period	(1)	(1)	(4)	(2)
Prior service cost:
Amortization to net income of net prior service costs (credits)	(3)	(3)	(7)	(7)
Prior service cost arising during period	1	0	1	0
Defined benefit plans sponsored by equity affiliates	3	5	5	13
Income tax expense on defined benefit plans	(28)	(35)	(58)	(74)
Total	97	117	187	238
Other Comprehensive Gain, Net of Tax	102	91	187	221
Comprehensive Income	4,392	3,513	7,119	7,302
Comprehensive loss (income) attributable to noncontrolling interests	15	(13)	22	(34)
Comprehensive Income Attributable to Chevron Corporation	$ 4,407	$ 3,500	$ 7,141	$ 7,268