CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Net Income	$ 2,642	$ 3,659
Currency translation adjustment	(4)	10
Unrealized holding gain (loss) on securities:
Net gain (loss) arising during period	(1)	(1)
Actuarial gain (loss):
Amortization to net income of net actuarial and settlement losses	125	157
Actuarial gain (loss) arising during period	(3)	(1)
Prior service cost:
Amortization to net income of net prior service costs (credits)	(4)	(4)
Defined benefit plans sponsored by equity affiliates	2	8
Income tax expense on defined benefit plans	(30)	(39)
Total	90	121
Other Comprehensive Gain, Net of Tax	85	130
Comprehensive Income	2,727	3,789
Comprehensive loss (income) attributable to noncontrolling interests	7	(21)
Comprehensive Income Attributable to Chevron Corporation	$ 2,734	$ 3,768