CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Statement of Comprehensive Income [Abstract]
Net Income (Loss)	$ 1,466	$ (1,463)	$ 4,165	$ (2,170)
Currency translation adjustment	10	(7)	24	2
Unrealized holding gain on securities:
Net gain (loss) arising during period	0	1	(5)	10
Actuarial gain (loss):
Amortization to net income of net actuarial and settlement losses	174	198	345	379
Actuarial loss arising during period	0	(14)	(14)	(14)
Prior service cost:
Amortization to net income of net prior service costs	(5)	8	(10)	13
Defined benefit plans sponsored by equity affiliates	4	5	10	14
Income tax expense on defined benefit plans	(61)	(73)	(111)	(145)
Total	112	124	220	247
Other Comprehensive Gain, Net of Tax	122	118	239	259
Comprehensive Income (Loss)	1,588	(1,345)	4,404	(1,911)
Comprehensive income attributable to noncontrolling interests	(16)	(7)	(33)	(25)
Comprehensive Income (Loss) Attributable to Chevron Corporation	$ 1,572	$ (1,352)	$ 4,371	$ (1,936)