CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Statement of Comprehensive Income [Abstract]
Net Income (Loss)	$ 1,986	$ 1,301	$ 6,151	$ (869)
Currency translation adjustment	13	7	37	9
Unrealized holding (loss) gain on securities:
Net (loss) gain arising during period	(2)	21	(7)	31
Actuarial gain (loss):
Amortization to net income of net actuarial and settlement losses	264	265	609	644
Actuarial gain (loss) arising during period	3	(9)	(11)	(23)
Prior service cost:
Amortization to net income of net prior service costs	(5)	2	(15)	15
Defined benefit plans sponsored by equity affiliates	5	5	15	19
Income tax expense on defined benefit plans	(96)	(102)	(207)	(247)
Total	171	161	391	408
Other Comprehensive Gain, Net of Tax	182	189	421	448
Comprehensive Income (Loss)	2,168	1,490	6,572	(421)
Comprehensive income attributable to noncontrolling interests	(34)	(18)	(67)	(43)
Comprehensive Income (Loss) Attributable to Chevron Corporation	$ 2,134	$ 1,472	$ 6,505	$ (464)