Consolidated Statement of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Statement of Comprehensive Income [Abstract]
Net Income (Loss)	$ 1,301	$ 2,057	$ (869)	$ 5,265
Currency translation adjustment	7	(16)	9	(35)
Unrealized holding gain on securities:
Net gain (loss) arising during period	21	(18)	31	(24)
Actuarial gain (loss):
Amortization to net income of net actuarial and settlement losses	265	204	644	548
Actuarial loss arising during period	(9)	0	(23)	0
Prior service cost:
Amortization to net income of net prior service costs	2	5	15	19
Defined benefit plans sponsored by equity affiliates	5	7	19	34
Income tax expense on defined benefit plans	(102)	(80)	(247)	(232)
Total	161	136	408	369
Other Comprehensive Gain, Net of Tax	189	102	448	310
Comprehensive Income (Loss)	1,490	2,159	(421)	5,575
Comprehensive income attributable to noncontrolling interests	(18)	(20)	(43)	(90)
Comprehensive Income (Loss) Attributable to Chevron Corporation	$ 1,472	$ 2,139	$ (464)	$ 5,485