Consolidated Statement of Comprehensive Income (Unaudited) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Net Income	$ 6,239		$ 6,499
Currency translation adjustment	(11)		14
Unrealized holding gain (loss) on securities:
Net gain (loss) arising during period	(1)		1
Derivatives:
Net derivatives gain on hedge transactions	0		10
Reclassification to net income of net realized (loss) gain	5		(6)
Income taxes benefit (expense) on derivatives transactions	2		(6)
Total	(3)		10
Actuarial loss:
Amortization to net income of net actuarial and settlement losses	227		273
Actuarial loss arising during period	0		(43)
Prior service cost:
Amortization to net income of net prior service credits	(7)		(14)
Defined benefit plans sponsored by equity affiliates	(20)		11
Income taxes on defined benefit plans	85		105
Total	(115)		(122)
Other Comprehensive Gain, Net of Tax	100	[1]	147
Comprehensive Income	6,339		6,646
Comprehensive income attributable to noncontrolling interests	(61)		(28)
Comprehensive Income Attributable to Chevron Corporation	$ 6,278		$ 6,618

[1] All amounts are net of tax.