Business and Basis of Presentation (Details) - Phillips 66 - refinery	Dec. 31, 2019	Aug. 01, 2015
Variable Interest Entity [Line Items]
Entities under common control, ownership percentage transferred, wholly owned		100.00%
Number of refineries most of our assets are connected to	9

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.

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