Consolidated Income Statement - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Revenues and Other Income
Sales and other operating revenues	$ 6,688	$ 6,415	$ 20,987	$ 16,884
Equity in earnings (losses) of affiliates	196	(60)	574	(129)
Gain on Dispositions	246	51	2,144	202
Other income	65	110	143	149
Total Revenues and Other Income	7,195	6,516	23,848	17,106
Costs and Expenses
Purchased commodities	2,926	2,819	9,040	7,046
Production and operating expenses	1,224	1,526	3,849	4,325
Selling, general and administrative expenses	132	203	423	556
Exploration expenses	75	457	724	1,572
Depreciation, depletion and amortization	1,608	2,425	5,212	7,001
Impairments	6	123	6,475	321
Taxes other than Income Taxes	175	161	604	538
Accretion on discounted liabilities	89	108	276	329
Interest and debt expense	251	335	872	928
Foreign currency transaction (gains) losses	5	13	28	12
Other Expense	51	0	285	0
Total Costs and Expenses	6,542	8,170	27,788	22,628
Income (Loss) before income taxes	653	(1,654)	(3,940)	(5,522)
Income tax provision (benefit)	217	(628)	(1,549)	(1,982)
Net income (loss)	436	(1,026)	(2,391)	(3,540)
Less: net income attributable to noncontrolling interests	(16)	(14)	(43)	(40)
Net Income (Loss) Attributable to ConocoPhillips	$ 420	$ (1,040)	$ (2,434)	$ (3,580)
Earnings Per Share, Basic [Abstract]
Earnings Per Share, Basic	$ 0.35	$ (0.84)	$ (1.98)	$ (2.88)
Earnings Per Share, Diluted [Abstract]
Earnings Per Share, Diluted	0.34	(0.84)	(1.98)	(2.88)
Dividends Paid Per Share of Common Stock (dollars)	$ 0.27	$ 0.25	$ 0.8	$ 0.75
Average Common Shares Outstanding (in thousands)
Basic	1,212,454,000	1,245,961,000	1,230,742	1,245,139
Diluted	1,215,341,000	1,245,961,000	1,230,742	1,245,139