Class A [Member] Class D [Member] Class E [Member] Class F [Member] Class I [Member] Class R [Member] Active Investment Management Risk [Member] Availability of Investment Opportunities [Member] Private Equity Investments [Member] “J-Curve” Performance Risk [Member] Market Risk [Member] Geographic Concentration Risks [Member] Sector Concentration Risk [Member] Infrastructure Sector Risk [Member] Real Estate Sector Risk [Member] Real Assets Investments Risk [Member] Venture Capital and Growth Equity Risk [Member] Investments in the Debt Securities of Small or Middle-Market Portfolio Companies Risk [Member] First Lien Senior Secured Loans, Second Lien Senior Secured Loans and Unitranche Debt [Member] Mezzanine Investments Risk [Member] Foreign Investments Risk [Member] Regional/Country Focus Risk [Member] China Investments Risk [Member] Illiquid and Restricted Securities Risks [Member] Leverage Risk [Member] Daily Valuation Risk [Member] Valuation of Private Investments Risk [Member] Valuations Subject to Adjustment [Member] Indemnification of Investment Funds, Investment Managers and Others [Member] Termination of the Fund’s Interest in an Investment Fund [Member] General Risks of Secondary Investments [Member] Force Majeure Risk [Member] Nature of Portfolio Companies [Member] Non-Diversification Risk [Member] New Fund Risk [Member] U.S. Government Securities Risk [Member] Valuation Risks [Member] Closed-end Interval Fund; Liquidity Risk [Member] Repurchase Risks [Member] Substantial Repurchases [Member] Possible Exclusion of a Shareholder Based on Certain Detrimental Effects [Member] Use of Cash or Money Market Investments [Member] Interest Rate Risks [Member] Derivatives Risk [Member] Futures and Options Risk [Member] Commodities Related Investments Risk [Member] Mortgage-Related Instruments Risk [Member] Other Risks Relating to the Fund [Member] Substantial Fees and Expenses [Member] Distributions In-Kind [Member] Incentive Allocation Arrangements [Member] Control Positions [Member] Inadequate Return [Member] Inside Information [Member] Recourse to the Fund’s Assets [Member] Substantial Repurchases Other Risks [Member] Currency Risk [Member] Emerging Markets Risk [Member] Equity Risk [Member] Special Purpose Acquisition Companies Risk [Member] Large Shareholder Transaction Risk [Member] Special Tax Risks [Member] Additional Tax Considerations; Distributions to Shareholders and Potential Fund-Level Tax Liabilities [Member] Operational Risks Associated with Cybersecurity [Member] Other Investment Companies Risk [Member] Regulatory and Legal Risks [Member] Limits Of Risk Disclosures [Member] CreditRiskMember