Consolidated Statement of Comprehensive Income (Unaudited) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Consolidated Statement of Comprehensive Income [Abstract]
Net Income	$ 7,232	$ 7,760	$ 13,731	$ 13,999
Currency translation adjustment	(12)	18	2	51
Unrealized holding gain (loss) on securities:
Net loss arising during period	(2)	(10)	(1)	(11)
Derivatives:
Net derivatives (loss) gain on hedge transactions	(7)	11	3
Reclassification to net income of net realized (gain) loss	(4)	(2)	2	(3)
Income taxes on derivatives transactions	4	(3)	(2)	1
Total	(7)	6	3	(2)
Actuarial loss:
Amortization to net income of net actuarial loss	233	176	506	386
Actuarial gain (loss) arising during period		4	(43)	55
Prior service cost:
Amortization to net income of net prior service (credits) costs	(16)	(5)	(30)	8
Defined benefit plans sponsored by equity affiliates	7	10	18	22
Income taxes on defined benefit plans	(60)	(63)	(165)	(160)
Total	164	122	286	311
Other Comprehensive Gain, Net of Tax	143	136	290	349
Comprehensive Income	7,375	7,896	14,021	14,348
Comprehensive income attributable to noncontrolling interests	(22)	(28)	(50)	(56)
Comprehensive Income Attributable to Chevron Corporation	$ 7,353	$ 7,868	$ 13,971	$ 14,292