XML 68 R3.htm IDEA: XBRL DOCUMENT v2.4.1.9
Consolidated Balance Sheets (Parenthetical)
Dec. 31, 2014
Dec. 31, 2013
Common units [Member] | Westlake [Member]    
Units issued 1,436,115us-gaap_LimitedPartnersCapitalAccountUnitsIssued
/ us-gaap_CounterpartyNameAxis
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/ us-gaap_LimitedPartnersCapitalAccountByClassAxis
= wlkp_CommonUnitsMember		 0us-gaap_LimitedPartnersCapitalAccountUnitsIssued
/ us-gaap_CounterpartyNameAxis
= wlkp_ParentCompanyAndSubsidiariesExcludingReportingEntityAndSubsidiariesMember
/ us-gaap_LimitedPartnersCapitalAccountByClassAxis
= wlkp_CommonUnitsMember
Units outstanding 1,436,115us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding
/ us-gaap_CounterpartyNameAxis
= wlkp_ParentCompanyAndSubsidiariesExcludingReportingEntityAndSubsidiariesMember
/ us-gaap_LimitedPartnersCapitalAccountByClassAxis
= wlkp_CommonUnitsMember		 0us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding
/ us-gaap_CounterpartyNameAxis
= wlkp_ParentCompanyAndSubsidiariesExcludingReportingEntityAndSubsidiariesMember
/ us-gaap_LimitedPartnersCapitalAccountByClassAxis
= wlkp_CommonUnitsMember
Common units [Member] | Public [Member]    
Units issued 12,937,500us-gaap_LimitedPartnersCapitalAccountUnitsIssued
/ us-gaap_CounterpartyNameAxis
= wlkp_UnidentifiedThirdPartiesMember
/ us-gaap_LimitedPartnersCapitalAccountByClassAxis
= wlkp_CommonUnitsMember		 0us-gaap_LimitedPartnersCapitalAccountUnitsIssued
/ us-gaap_CounterpartyNameAxis
= wlkp_UnidentifiedThirdPartiesMember
/ us-gaap_LimitedPartnersCapitalAccountByClassAxis
= wlkp_CommonUnitsMember
Units outstanding 12,937,500us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding
/ us-gaap_CounterpartyNameAxis
= wlkp_UnidentifiedThirdPartiesMember
/ us-gaap_LimitedPartnersCapitalAccountByClassAxis
= wlkp_CommonUnitsMember		 0us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding
/ us-gaap_CounterpartyNameAxis
= wlkp_UnidentifiedThirdPartiesMember
/ us-gaap_LimitedPartnersCapitalAccountByClassAxis
= wlkp_CommonUnitsMember
Subordinated units [Member] | Westlake [Member]    
Units issued 12,686,115us-gaap_LimitedPartnersCapitalAccountUnitsIssued
/ us-gaap_CounterpartyNameAxis
= wlkp_ParentCompanyAndSubsidiariesExcludingReportingEntityAndSubsidiariesMember
/ us-gaap_LimitedPartnersCapitalAccountByClassAxis
= wlkp_SubordinatedUnitsMember		 0us-gaap_LimitedPartnersCapitalAccountUnitsIssued
/ us-gaap_CounterpartyNameAxis
= wlkp_ParentCompanyAndSubsidiariesExcludingReportingEntityAndSubsidiariesMember
/ us-gaap_LimitedPartnersCapitalAccountByClassAxis
= wlkp_SubordinatedUnitsMember
Units outstanding 12,686,115us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding
/ us-gaap_CounterpartyNameAxis
= wlkp_ParentCompanyAndSubsidiariesExcludingReportingEntityAndSubsidiariesMember
/ us-gaap_LimitedPartnersCapitalAccountByClassAxis
= wlkp_SubordinatedUnitsMember		 0us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding
/ us-gaap_CounterpartyNameAxis
= wlkp_ParentCompanyAndSubsidiariesExcludingReportingEntityAndSubsidiariesMember
/ us-gaap_LimitedPartnersCapitalAccountByClassAxis
= wlkp_SubordinatedUnitsMember