2.4.0.8 Html 4 19 1 false 3 0 false 0 false false R1.htm 0000 - Document - Document and Entity Information Sheet http://www.delawareinvestments.com/role/DocumentAndEntityInformation Document and Entity Information false false R2.htm 0001 - Document - Risk/Return Summary - The Focus Smid-Cap Growth Equity Portfolio {Unlabeled} Sheet http://www.delawareinvestments.com/role/RiskReturnSummaryFocusSmidCapGrowthEquityPortfolioUnlabeled Risk/Return Summary - The Focus Smid-Cap Growth Equity Portfolio false false R3.htm 0002 - Disclosure - Risk/Return Detail Data - The Focus Smid-Cap Growth Equity Portfolio {Elements} Sheet http://www.delawareinvestments.com/role/RiskReturnDetailDataFocusSmidCapGrowthEquityPortfolioElements Risk/Return Detail Data - The Focus Smid-Cap Growth Equity Portfolio false false R4.htm 0003 - Document - Risk/Return Summary - The Large-Cap Growth Equity Portfolio {Unlabeled} Sheet http://www.delawareinvestments.com/role/RiskReturnSummaryLargeCapGrowthEquityPortfolioUnlabeled Risk/Return Summary - The Large-Cap Growth Equity Portfolio false false R5.htm 0004 - Disclosure - Risk/Return Detail Data - The Large-Cap Growth Equity Portfolio {Elements} Sheet http://www.delawareinvestments.com/role/RiskReturnDetailDataLargeCapGrowthEquityPortfolioElements Risk/Return Detail Data - The Large-Cap Growth Equity Portfolio false false R6.htm 0005 - Document - Risk/Return Summary - The Select 20 Portfolio {Unlabeled} Sheet http://www.delawareinvestments.com/role/RiskReturnSummarySelect20PortfolioUnlabeled Risk/Return Summary - The Select 20 Portfolio false false R7.htm 0006 - Disclosure - Risk/Return Detail Data - The Select 20 Portfolio {Elements} Sheet http://www.delawareinvestments.com/role/RiskReturnDetailDataSelect20PortfolioElements Risk/Return Detail Data - The Select 20 Portfolio false false R8.htm 040000 - Disclosure - Risk/Return Detail Data {Elements} Sheet http://xbrl.sec.gov/rr/role/RiskReturnDetailData Risk/Return Detail Data true false All Reports Book All Reports dpt-20141031.xml dpt-20141031.xsd dpt-20141031_def.xml dpt-20141031_lab.xml dpt-20141031_pre.xml true false