Supplementary Information - Condensed Consolidating Financial Information (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Revenues and Other Income
Sales and other operating revenues	$ 54,413	[1]	$ 57,967	[1]	$ 64,196	[1]
Equity in earnings of affiliates	2,219		1,911		1,239
Gain on dispositions	1,242		1,657		370
Other income	374		469		264
Total Revenues and Other Income	58,248		62,004		66,069
Costs and Expenses
Purchased commodities	22,643		25,232		29,797
Production and operating expenses	7,238		6,793		6,426
Selling, general and administrative expenses	854		1,106		865
Exploration expenses	1,232		1,500		1,038
Depreciation, depletion and amortization	7,434		6,580		6,827
Impairments	529		680		321
Taxes other than income taxes	2,884		3,546		3,999
Accretion on discounted liabilities	434		394		422
Interest and debt expense	612		709		954
Foreign currency transaction (gains) losses	(58)		41		24
Total Costs and Expenses	43,802		46,581		50,673
Income (loss) before income taxes	14,446		15,423		15,396
Provision for income taxes	6,409		7,942		8,208
Income (Loss) From Continuing Operations	8,037		7,481		7,188
Income (loss) from discontinued operations	1,178	[2]	1,017	[2]	5,314	[2]
Net income (loss)	9,215		8,498		12,502
Less: net income attributable to noncontrolling interests	(59)		(70)		(66)
Net income (loss) attributable to ConocoPhillips	9,156		8,428		12,436
Comprehensive Income Attributable to ConocoPhillips	7,071		9,055		10,749
ConocoPhillips [Member]
Revenues and Other Income
Equity in earnings of affiliates	8,374		7,871	[3]	7,600	[3]
Other income	2		(76)
Intercompany revenues	82		61	[3]	4	[3]
Total Revenues and Other Income	8,458		7,856		7,604
Costs and Expenses
Selling, general and administrative expenses	11		12		13
Interest and debt expense	630		700	[3]	726	[3]
Foreign currency transaction (gains) losses	52		(19)
Total Costs and Expenses	693		693		739
Income (loss) before income taxes	7,765		7,163		6,865
Provision for income taxes	(213)		(248)		(257)
Income (Loss) From Continuing Operations	7,978		7,411		7,122
Income (loss) from discontinued operations	1,178		1,017		5,314
Net income (loss)	9,156		8,428		12,436
Net income (loss) attributable to ConocoPhillips	9,156		8,428		12,436
Comprehensive Income Attributable to ConocoPhillips	7,071		9,055		10,749
ConocoPhillips Company [Member]
Revenues and Other Income
Sales and other operating revenues	18,186		17,768		20,606
Equity in earnings of affiliates	9,200		8,545	[3]	7,317	[3]
Gain on dispositions	364		2		261
Other income	271		177		98
Intercompany revenues	458		1,077	[3]	1,406	[3]
Total Revenues and Other Income	28,479		27,569		29,688
Costs and Expenses
Purchased commodities	15,779		15,680		17,944
Production and operating expenses	1,492		1,304		1,126
Selling, general and administrative expenses	623		845		607
Exploration expenses	659		402		333
Depreciation, depletion and amortization	907		807		867
Impairments	4		8		38
Taxes other than income taxes	236		264		292
Accretion on discounted liabilities	56		53		48
Interest and debt expense	327		316	[3]	448	[3]
Foreign currency transaction (gains) losses	3		19		(16)
Total Costs and Expenses	20,086		19,698		21,687
Income (loss) before income taxes	8,393		7,871		8,001
Provision for income taxes	19		(1)		401
Income (Loss) From Continuing Operations	8,374		7,872		7,600
Income (loss) from discontinued operations	1,178		1,017		5,314
Net income (loss)	9,552		8,889		12,914
Net income (loss) attributable to ConocoPhillips	9,552		8,889		12,914
Comprehensive Income Attributable to ConocoPhillips	7,467		9,516		11,227
ConocoPhillips Australia Funding Company [Member]
Revenues and Other Income
Intercompany revenues	13		46	[3]	46	[3]
Total Revenues and Other Income	13		46		46
Costs and Expenses
Interest and debt expense	12		42	[3]	42	[3]
Total Costs and Expenses	12		42		42
Income (loss) before income taxes	1		4		4
Provision for income taxes			1		1
Income (Loss) From Continuing Operations	1		3		3
Net income (loss)	1		3		3
Net income (loss) attributable to ConocoPhillips	1		3		3
Comprehensive Income Attributable to ConocoPhillips	1		3		3
ConocoPhillips Canada Funding Company I [Member]
Revenues and Other Income
Intercompany revenues	305		313	[3]	328	[3]
Total Revenues and Other Income	305		313		328
Costs and Expenses
Selling, general and administrative expenses	1		1		1
Interest and debt expense	235		237	[3]	220	[3]
Foreign currency transaction (gains) losses	(349)		152		37
Total Costs and Expenses	(113)		390		258
Income (loss) before income taxes	418		(77)		70
Provision for income taxes	31		9
Income (Loss) From Continuing Operations	387		(86)		70
Net income (loss)	387		(86)		70
Net income (loss) attributable to ConocoPhillips	387		(86)		70
Comprehensive Income Attributable to ConocoPhillips	99		24		(28)
All Other Subsidiaries [Member]
Revenues and Other Income
Sales and other operating revenues	36,227		40,199		43,590
Equity in earnings of affiliates	2,611		1,832	[3]	1,312	[3]
Gain on dispositions	878		1,655		109
Other income	101		368		166
Intercompany revenues	4,948		2,997	[3]	1,766	[3]
Total Revenues and Other Income	44,765		47,051		46,943
Costs and Expenses
Purchased commodities	11,812		13,000		14,287
Production and operating expenses	5,756		5,512		5,363
Selling, general and administrative expenses	238		258		253
Exploration expenses	573		1,098		705
Depreciation, depletion and amortization	6,527		5,773		5,960
Impairments	525		672		283
Taxes other than income taxes	2,648		3,282		3,707
Accretion on discounted liabilities	378		341		374
Interest and debt expense	237		427	[3]	562	[3]
Foreign currency transaction (gains) losses	236		(111)		3
Total Costs and Expenses	28,930		30,252		31,497
Income (loss) before income taxes	15,835		16,799		15,446
Provision for income taxes	6,572		8,181		8,063
Income (Loss) From Continuing Operations	9,263		8,618		7,383
Income (loss) from discontinued operations	1,178		777		4,868
Net income (loss)	10,441		9,395		12,251
Less: net income attributable to noncontrolling interests	(59)		(70)		(66)
Net income (loss) attributable to ConocoPhillips	10,382		9,325		12,185
Comprehensive Income Attributable to ConocoPhillips	7,782		9,560		10,973
Consolidating Adjustments [Member]
Revenues and Other Income
Equity in earnings of affiliates	(17,966)		(16,337)	[3]	(14,990)	[3]
Intercompany revenues	(5,806)		(4,494)	[3]	(3,550)	[3]
Total Revenues and Other Income	(23,772)		(20,831)		(18,540)
Costs and Expenses
Purchased commodities	(4,948)		(3,448)		(2,434)
Production and operating expenses	(10)		(23)		(63)
Selling, general and administrative expenses	(19)		(10)		(9)
Interest and debt expense	(829)		(1,013)	[3]	(1,044)	[3]
Total Costs and Expenses	(5,806)		(4,494)		(3,550)
Income (loss) before income taxes	(17,966)		(16,337)		(14,990)
Income (Loss) From Continuing Operations	(17,966)		(16,337)		(14,990)
Income (loss) from discontinued operations	(2,356)		(1,794)		(10,182)
Net income (loss)	(20,322)		(18,131)		(25,172)
Net income (loss) attributable to ConocoPhillips	(20,322)		(18,131)		(25,172)
Comprehensive Income Attributable to ConocoPhillips	$ (15,349)		$ (19,103)		$ (22,175)

[1] Sales and other operating revenues are attributable to countries based on the location of the operations generating the revenues.

[2] *Net of provision for income taxes on discontinued operations of: $283, $745, $2,291

[3] *"Interest and debt expense" for ConocoPhillips was revised to reflect contractually agreed interest rates, with offsetting adjustments in the "Equity in earnings of affiliates" and "Intercompany Revenues" lines for ConocoPhillips, ConocoPhillips Company and All Other Subsidiaries. There was no impact to Total Consolidated balances.