Label	Element	Value
TIFF Multi-Asset Fund
Risk/Return:	rr_RiskReturnAbstract
Supplement to Prospectus [Text Block]	rr_SupplementToProspectusTextBlock	TIFF Investment Program (“TIP”) Supplement dated November 13, 2019 to the TIP Prospectus dated April 30, 2019, as Supplemented June 26, and September 27, 2019, and to the TIFF Multi-Asset Fund Summary Prospectus dated April 30, 2019, This supplement provides new and additional information to the TIP prospectus dated April 30, 2019, as supplemented June 26, and September 27, 2019, to the TIFF Multi-Asset Fund summary prospectus dated April 30, 2019, and to the TIFF Short-Term Fund summary prospectus dated April 30, 2019.
Risk/Return [Heading]	rr_RiskReturnHeading	TIFF Multi-Asset Fund
Strategy Narrative [Text Block]	rr_StrategyNarrativeTextBlock	The following paragraph is added as a new fourth paragraph under the heading “Principal Investment Strategies” on page 2 of the prospectus and on page 2 of the TIFF Multi-Asset Fund summary prospectus: TAS also pursues a direct trading strategy whereby it invests a portion of Multi-Asset Fund’s assets directly in a limited number of publicly traded equity securities (typically, not more than 20). The issuers of such securities may be of any size, operate in any industry, and have domestic as well as international operations. TAS chooses these direct equity holdings from the listed equity positions reported on Form 13F by a small group of long-oriented, active investment managers based upon TAS’s belief that such managers have demonstrated an ongoing ability to add value through security selection and tend not to trade holdings frequently.
Risk Narrative [Text Block]	rr_RiskNarrativeTextBlock	The following paragraph is added as a new first paragraph under the heading “Principal Investment Risks” for TIFF Multi-Asset Fund on page 3 of the prospectus and on page 3 of the TIFF Multi-Asset Fund summary prospectus: The fund’s principal risks are presented below in alphabetical order, and not in the order of importance or potential exposure, so as to facilitate the reader’s ability to find particular risks and compare them with the risks of other funds. Each risk summarized below is considered a “principal risk” of investing in the fund, regardless of the order in which it appears. *The following paragraph is added, in alphabetical order, to the list of Principal Investment Risks on page 3 of the prospectus and on page 3 of the TIFF Multi-Asset Fund summary prospectus:* Direct Trading Strategy Risks. TAS generally will not buy or sell securities within its direct trading strategy directly in response to changing market conditions in general or with respect to specific issuers. This portion of the fund’s portfolio also likely will be concentrated to a significant extent in a small number of issuers or particular industries (see Focus Risk below). As a result, such portion of the fund’s portfolio may face greater risks than if it were managed directly in response to market conditions or more broadly diversified over a greater number of issuers or industries.
Risk Closing [Text Block]	rr_RiskClosingTextBlock	Please keep this supplement for future reference.

- Definition

(ii) (A) If the Fund is a Money Market Fund that is not a government Money Market Fund, as defined in §270.2a– 7(a)(16) or a retail Money Market Fund, as defined in § 270.2a–7(a)(25), include the following statement: You could lose money by investing in the Fund. Because the share price of the Fund will fluctuate, when you sell your shares they may be worth more or less than what you originally paid for them. The Fund may impose a fee upon sale of your shares or may temporarily suspend your ability to sell shares if the Fund's liquidity falls below required minimums because of market conditions or other factors. An investment in the Fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. The Fund's sponsor has no legal obligation to provide financial support to the Fund, and you should not expect that the sponsor will provide financial support to the Fund at any time. (B) If the Fund is a Money Market Fund that is a government Money Market Fund, as defined in § 270.2a–7(a)(16), or a retail Money Market Fund, as defined in § 270.2a–7(a)(25), and that is subject to the requirements of §§ 270.2a–7(c)(2)(i) and/or (ii) of this chapter (or is not subject to the requirements of §§ 270.2a–7(c)(2)(i) and/or (ii) of this chapter pursuant to § 270.2a–7(c)(2)(iii) of this chapter, but has chosen to rely on the ability to impose liquidity fees and suspend redemptions consistent with the requirements of §§ 270.2a–7(c)(2)(i) and/or (ii)), include the following statement: You could lose money by investing in the Fund. Although the Fund seeks to preserve the value of your investment at $1.00 per share, it cannot guarantee it will do so. The Fund may impose a fee upon sale of your shares or may temporarily suspend your ability to sell shares if the Fund's liquidity falls below required minimums because of market conditions or other factors. An investment in the Fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. The Fund's sponsor has no legal obligation to provide financial support to the Fund, and you should not expect that the sponsor will provide financial support to the Fund at any time. (C) If the Fund is a Money Market Fund that is a government Money Market Fund, as defined in § 270.2a–7(a)(16), that is not subject to the requirements of §§ 270.2a–7(c)(2)(i) and/or (ii) of this chapter pursuant to § 270.2a–7(c)(2)(iii) of this chapter, and that has not chosen to rely on the ability to impose liquidity fees and suspend redemptions consistent with the requirements of §§ 270.2a–7(c)(2)(i) and/or (ii), include the following statement: You could lose money by investing in the Fund. Although the Fund seeks to preserve the value of your investment at $1.00 per share, it cannot guarantee it will do so. An investment in the Fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. The Fund's sponsor has no legal obligation to provide financial support to the Fund, and you should not expect that the sponsor will provide financial support to the Fund at any time. Instruction. If an affiliated person, promoter, or principal underwriter of the Fund, or an affiliated person of such a person, has contractually committed to provide financial support to the Fund, and the term of the agreement will extend for at least one year following the effective date of the Fund's registration statement, the statement specified in Item 4(b)(1)(ii)(A), Item 4(b)(1)(ii)(B), or Item 4(b)(1)(ii)(C) may omit the last sentence ("The Fund's sponsor has no legal obligation to provide financial support to the Fund, and you should not expect that the sponsor will provide financial support to the Fund at any time."). For purposes of this Instruction, the term "financial support" includes any capital contribution, purchase of a security from the Fund in reliance on § 270.17a–9, purchase of any defaulted or devalued security at par, execution of letter of credit or letter of indemnity, capital support agreement (whether or not the Fund ultimately received support), performance guarantee, or any other similar action reasonably intended to increase or stabilize the value or liquidity of the fund's portfolio; however, the term "financial support" excludes any routine waiver of fees or reimbursement of fund expenses, routine inter-fund lending, routine inter-fund purchases of fund shares, or any action that would qualify as financial support as defined above, that the board of directors has otherwise determined not to be reasonably intended to increase or stabilize the value or liquidity of the fund's portfolio. (iii) If the Fund is advised by or sold through an insured depository institution, state that: An investment in the Fund is not a deposit of the bank and is not insured or guaranteed by the Federal Deposit Insurance corporation or any other government agency. Instruction. A Money Market Fund that is advised by or sold through an insured depository institution should combine the disclosure required by Items 4(b)(1)(ii) and (iii) in a single statement.

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