CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Statement of Comprehensive Income [Abstract]
Net Income	$ 3,422	$ 1,466	$ 7,081	$ 4,165
Currency translation adjustment	(20)	10	(10)	24
Unrealized holding gain (loss) on securities:
Net gain (loss) arising during period	(6)	0	(7)	(5)
Actuarial gain (loss):
Amortization to net income of net actuarial and settlement losses	151	174	308	345
Actuarial gain (loss) arising during period	(1)	0	(2)	(14)
Prior service cost:
Amortization to net income of net prior service costs	(3)	(5)	(7)	(10)
Defined benefit plans sponsored by equity affiliates	5	4	13	10
Income tax expense on defined benefit plans	(35)	(61)	(74)	(111)
Total	117	112	238	220
Other Comprehensive Gain, Net of Tax	91	122	221	239
Comprehensive Income	3,513	1,588	7,302	4,404
Comprehensive income attributable to noncontrolling interests	(13)	(16)	(34)	(33)
Comprehensive Income Attributable to Chevron Corporation	$ 3,500	$ 1,572	$ 7,268	$ 4,371