Document and Entity Information Document and Entity Information
Jul. 08, 2020
Document and Entity Information [Abstract]  
Document Type 8-K
Document Period End Date Jul. 08, 2020
Entity Registrant Name Phillips 66
Entity Incorporation, State or Country Code DE
Entity File Number 001-35349
Entity Tax Identification Number 45-3779385
Entity Address, Address Line One 2331 CityWest Boulevard
Entity Address, City or Town Houston
Entity Address, State or Province TX
Entity Address, Postal Zip Code 77042
City Area Code 281
Local Phone Number 293-6600
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Common stock, $0.01 par value
Trading Symbol PSX
Security Exchange Name NYSE
Entity Emerging Growth Company false
Entity Central Index Key 0001534701
Amendment Flag false