Consolidated Statement of Comprehensive Income (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Consolidated Statement of Comprehensive Income [Abstract]
Net Income	$ 27,008	$ 19,136	$ 10,563
Currency translation adjustment
Unrealized net change arising during period	17	6	60
Unrealized holding (loss) gain on securities
Net (loss) gain arising during period	(11)	(4)	2
Derivatives
Net derivatives gain (loss) on hedge transactions	20	25	(69)
Reclassification to net income of net realized loss (gain)	9	5	(23)
Income taxes on derivatives transactions	(10)	(10)	32
Total	19	20	(60)
Actuarial loss
Amortization to net income of net actuarial loss	773	635	575
Actuarial loss arising during period	(3,250)	(857)	(1,099)
Prior service cost
Amortization to net income of net prior service credits	(26)	(61)	(65)
Prior service cost arising during period	(27)	(12)	(34)
Defined benefit plans sponsored by equity affiliates	(81)	(12)	65
Income taxes on defined benefit plans	1,030	140	159
Total	(1,581)	(167)	(399)
Other Comprehensive Loss, Net of Tax	(1,556)	(145)	(397)
Comprehensive Income	25,452	18,991	10,166
Comprehensive income attributable to noncontrolling interests	(113)	(112)	(80)
Comprehensive Income Attributable to Chevron Corporation	$ 25,339	$ 18,879	$ 10,086