XML 68 R56.htm IDEA: XBRL DOCUMENT
v3.5.0.2

Derivatives and Financial Instruments (Narrative) (Details) | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2016 | Dec. 31, 2015
Financial instruments and derivative contracts (Textual) [Abstract] |  |
Percentage of derivative contract volume expiring within twelve months | 99.00% | 99.00%

X
- Definition Estimated percentage of derivative contract volume expiring within twelve months + References No definition available. + Details
Name: | psx_EstimatedPercentageOfDerivativeContractVolumeExpiringWithinTwelveMonths
Namespace Prefix: | psx_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Financial instruments and derivative contracts. + References No definition available. + Details
Name: | psx_FinancialInstrumentsAndDerivativeContractsTextualAbstract
Namespace Prefix: | psx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration