Consolidated Income Statement - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenues and Other Income
Sales and other operating revenues	$ 8,798	$ 7,518	[1]
Equity in earnings (losses) of affiliates	208	200
Gain on Dispositions	7	22
Other income	(52)	31
Total Revenues and Other Income	8,961	7,771
Costs and Expenses
Purchased commodities	3,714	3,192
Production and operating expenses	1,171	1,291	[2],[3]
Selling, general and administrative expenses	99	97	[2],[3]
Exploration expenses	95	550	[2],[3]
Depreciation, depletion and amortization	1,412	1,979
Impairments	12	175
Taxes other than Income Taxes	183	231
Accretion on discounted liabilities	88	95
Interest and debt expense	184	315
Foreign currency transaction (gains) losses	30	10
Other Expense	197	68	[2],[4]
Total Costs and Expenses	7,185	8,003
Income (Loss) before income taxes	1,776	(232)
Income tax provision (benefit)	876	(831)
Net income (loss)	900	599
Less: net income attributable to noncontrolling interests	(12)	(13)
Net Income (Loss) Attributable to ConocoPhillips	$ 888	$ 586
Earnings Per Share, Basic [Abstract]
Earnings Per Share, Basic	$ 0.75	$ 0.47
Earnings Per Share, Diluted [Abstract]
Earnings Per Share, Diluted	0.75	0.47
Dividends Paid Per Share of Common Stock (dollars)	$ 0.285	$ 0.265
Average Common Shares Outstanding (in thousands)
Basic	1,179,792	1,243,280
Diluted	1,186,454	1,248,722

[1] *Under the modified retrospective approach, prior period amounts have not been adjusted upon adoption of ASC Topic 606.

[2] *Certain amounts have been reclassified to conform to the current-period presentation resulting from the adoption of ASU No. 2017-07.

[3] See Note 2—Changes in Accounting Principles, for additional information.

[4] See Note 2—Changes in Accounting Principles, for additional information.