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TIFF Multi-Asset Fund  
Risk/Return: rr_RiskReturnAbstract  
Supplement to Prospectus [Text Block] rr_SupplementToProspectusTextBlock
[MISSING IMAGE: lg_tiff2018tip-pn.jpg]
TIFF Investment Program (“TIP”)
Supplement dated April 28, 2023
to the Prospectus dated April 28, 2023
TIFF Multi-Asset Fund
(the “Fund”)
Risk/Return [Heading] rr_RiskReturnHeading TIFF Multi-Asset Fund
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
For members who are not non-profit organizations, the following supplements similar language under the heading Fund Performance — Average Annual Total Returns in the fund summary section of the prospectus.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The table below illustrates the changes in the Fund’s yearly performance and shows how the Fund’s average returns for one year, five years, ten years, and since Fund inception compared with selected benchmarks.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.
Performance Table Heading rr_PerformanceTableHeading Average Annual Total Returns (for periods ended 12/31/2022)
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (does not reflect fees, expenses, or taxes)
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the effect of state and local taxes.
Performance Table Narrative rr_PerformanceTableNarrativeTextBlock
The table below illustrates the changes in the Fund’s yearly performance and shows how the Fund’s average returns for one year, five years, ten years, and since Fund inception compared with selected benchmarks. Prior to December 1, 2021, the Fund received entry fees on purchases and exit fees on redemptions of Fund shares; thus, Fund performance for periods prior to December 1, 2021 reflect those fees’ impact. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the effect of state and local taxes. Actual after-tax returns depend upon a member’s tax situation and may differ from those shown.
TIFF Multi-Asset Fund | 65/35 Mix (65% MSCI All Country World Index, 35% Bloomberg Barclays US Aggregate Bond Index) (does not reflect fees, expenses, or taxes)  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel 65/35 Mix (65% MSCI All Country World Index, 35% Bloomberg Barclays US Aggregate Bond Index) (does not reflect fees, expenses, or taxes)
1 Year rr_AverageAnnualReturnYear01 (16.30%)
5 Years rr_AverageAnnualReturnYear05 3.70%
10 Years rr_AverageAnnualReturnYear10 5.72%
Since Inception rr_AverageAnnualReturnSinceInception 6.36%
Inception Date rr_AverageAnnualReturnInceptionDate Mar. 31, 1995
TIFF Multi-Asset Fund | Consumer Price Index (“CPI”) +5% per annum (does not reflect fees, expenses, or taxes)  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel Consumer Price Index (“CPI”) +5% per annum (does not reflect fees, expenses, or taxes)
1 Year rr_AverageAnnualReturnYear01 11.75%
5 Years rr_AverageAnnualReturnYear05 8.95%
10 Years rr_AverageAnnualReturnYear10 7.71%
Since Inception rr_AverageAnnualReturnSinceInception 7.56%
Inception Date rr_AverageAnnualReturnInceptionDate Mar. 31, 1995
TIFF Multi-Asset Fund | MSCI All Country World Index (does not reflect fees, expenses, or taxes)  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel MSCI All Country World Index (does not reflect fees, expenses, or taxes)
1 Year rr_AverageAnnualReturnYear01 (18.36%)
5 Years rr_AverageAnnualReturnYear05 5.22%
10 Years rr_AverageAnnualReturnYear10 7.97%
Since Inception rr_AverageAnnualReturnSinceInception 6.86%
Inception Date rr_AverageAnnualReturnInceptionDate Mar. 31, 1995
TIFF Multi-Asset Fund | Bloomberg Barclays US Aggregate Bond Index (does not reflect fees, expenses, or taxes)  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel Bloomberg Barclays US Aggregate Bond Index (does not reflect fees, expenses, or taxes)
1 Year rr_AverageAnnualReturnYear01 (13.01%)
5 Years rr_AverageAnnualReturnYear05 0.02%
10 Years rr_AverageAnnualReturnYear10 1.06%
Since Inception rr_AverageAnnualReturnSinceInception 4.50%
Inception Date rr_AverageAnnualReturnInceptionDate Mar. 31, 1995
TIFF Multi-Asset Fund | TIFF Multi-Asset Fund  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel Return before Taxes
1 Year rr_AverageAnnualReturnYear01 (15.17%)
5 Years rr_AverageAnnualReturnYear05 3.73%
10 Years rr_AverageAnnualReturnYear10 5.31%
Since Inception rr_AverageAnnualReturnSinceInception 7.17%
Inception Date rr_AverageAnnualReturnInceptionDate Mar. 31, 1995
TIFF Multi-Asset Fund | TIFF Multi-Asset Fund | After Taxes on Distributions  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel Return after Taxes on Distributions
1 Year rr_AverageAnnualReturnYear01 (17.06%)
5 Years rr_AverageAnnualReturnYear05 1.96%
10 Years rr_AverageAnnualReturnYear10 3.17%
Since Inception rr_AverageAnnualReturnSinceInception 5.32%
Inception Date rr_AverageAnnualReturnInceptionDate Mar. 31, 1995
TIFF Multi-Asset Fund | TIFF Multi-Asset Fund | After Taxes on Distributions and Sale of Fund Shares  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel Return after Taxes on Distributions and Sale of Fund Shares
1 Year rr_AverageAnnualReturnYear01 (7.64%)
5 Years rr_AverageAnnualReturnYear05 2.68%
10 Years rr_AverageAnnualReturnYear10 3.63%
Since Inception rr_AverageAnnualReturnSinceInception 5.31%
Inception Date rr_AverageAnnualReturnInceptionDate Mar. 31, 1995