Label	Element	Value
TIFF Short-Term Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	TIFF Investment Program (“TIP”) Supplement dated April 29, 2020 to the Prospectus dated April 29, 2020 TIFF Short-Term Fund
Risk/Return [Heading]	rr_RiskReturnHeading	TIFF Short-Term 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 each fund summary section of the prospectus.
Performance Information Illustrates Variability of Returns [Text]	rr_PerformanceInformationIllustratesVariabilityOfReturns	The table below illustrates the changes in the funds’ yearly performance and shows how each fund’s average returns for one year, five years, ten years, and since fund inception, which reflect the deduction of entry and exit fees from a member’s account, 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 funds will perform in the future.
Performance Table Heading	rr_PerformanceTableHeading	Average Annual Total Returns (for periods ended 12/31/2019)
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 funds’ yearly performance and shows how each fund’s average returns for one year, five years, ten years, and since fund inception, which reflect the deduction of entry and exit fees from a member’s account, compared with selected benchmarks. Past performance (before and after taxes) is not necessarily an indication of how the funds 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 Short-Term Fund \| BofA Merrill Lynch US 6-Month Treasury Bill Index (does not reflect fees, expenses, or taxes)
Risk/Return:	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	BofA Merrill Lynch US 6-Month Treasury Bill Index (does not reflect fees, expenses, or taxes)
1 Year	rr_AverageAnnualReturnYear01	2.57%
5 Years	rr_AverageAnnualReturnYear05	1.26%
10 Years	rr_AverageAnnualReturnYear10	0.74%
Since Inception	rr_AverageAnnualReturnSinceInception	2.79%
Inception Date	rr_AverageAnnualReturnInceptionDate	May 31, 1994
TIFF Short-Term Fund \| TIFF Short-Term Fund
Risk/Return:	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Return before Taxes
1 Year	rr_AverageAnnualReturnYear01	2.20%
5 Years	rr_AverageAnnualReturnYear05	0.92%
10 Years	rr_AverageAnnualReturnYear10	0.43%
Since Inception	rr_AverageAnnualReturnSinceInception	2.59%
Inception Date	rr_AverageAnnualReturnInceptionDate	May 31, 1994
TIFF Short-Term Fund \| TIFF Short-Term Fund \| After Taxes on Distributions
Risk/Return:	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Return after Taxes on Distributions
1 Year	rr_AverageAnnualReturnYear01	1.30%
5 Years	rr_AverageAnnualReturnYear05	0.54%
10 Years	rr_AverageAnnualReturnYear10	0.24%
Since Inception	rr_AverageAnnualReturnSinceInception	1.57%
TIFF Short-Term Fund \| TIFF Short-Term 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	1.30%
5 Years	rr_AverageAnnualReturnYear05	0.54%
10 Years	rr_AverageAnnualReturnYear10	0.25%
Since Inception	rr_AverageAnnualReturnSinceInception	1.58%

Return Before Taxes.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form
-Number N-1A
-Chapter A
-Section 4
-Subsection b
-Paragraph 2
-Subparagraph instructions
-Clause 4

+ Details

Name:	rr_AverageAnnualReturnInceptionDate
Namespace Prefix:	rr_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

This item represents Average Annual Total Returns. If a Multiple Class Fund offers a Class in the prospectus that converts into another Class after a stated period, compute average annual total returns in the table by using the returns of the other Class for the period after conversion.

+ References