Equity (Details) (USD $) In Millions, except Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Equity [Abstract]
Company's share of undistributed earnings for equity affiliates	$ 11,395	$ 10,119
Shares available for issuance under the Chevron Corporation LTIP	143,000,000
Maximum number of share that may be issued under LTIP from April 2004 through January 2014 (in shares)	260,000,000
Shares available for issuance under company's non employee directors plan	204,000
Shares authorized for issuance under company's non employee directors plan	800,000