Summarized Financial Data - Chevron U.S.A. Inc. (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Subsidiary Statements Captions [Line Items]
Sales and other operating revenues	$ 220,156	[1]	$ 230,590	[1]	$ 244,371	[1]
Total costs and other deductions	192,943		195,577		206,072
Net income	21,423		26,179	[2]	26,895	[2]
Chevron U.S.A. Inc. [Member]
Subsidiary Statements Captions [Line Items]
Sales and other operating revenues	174,318		183,215		187,929
Total costs and other deductions	169,984		175,009		178,510
Net income	$ 3,714		$ 6,216		$ 6,898

[1] *Includes excise, value-added and similar taxes.$8,492 $8,010 $8,085See accompanying Notes to the Consolidated Financial Statements.

[2] There was no effect of dividend equivalents paid on stock units or dilutive impact of employee stock-based awards on earnings.