Supplementary Information - Condensed Consolidating Financial Information (Details)	Mar. 31, 2020
ConocoPhillips Company [Member] \| ConocoPhillips [Member]
Condensed Financial Statements, Captions [Line Items]
Ownership Percentage by Parent	100.00%
Burlington Resources LLC [Member] \| ConocoPhillips Company [Member]
Condensed Financial Statements, Captions [Line Items]
Ownership Percentage by Parent	100.00%

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	srt_CondensedFinancialStatementsCaptionsLineItems
Namespace Prefix:	srt_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration