University of Chicago Self Insurance Trust

EIN 36-3020034 • 501(c)3 • Chicago, IL

Profile

A self insurance program for the purpose of settling health care patient claims asserting professional negligence against the university of chicago, the university of chicago medical center, thier employees and agents.

6054 S Drexel AvenueChicago, IL 60637

n/A

Siviq Scores

Precomputed percentiles relative to similar nonprofits. These scores are descriptive rather than judgmental.

0.81x

Higher debt load relative to assets than 83% of similar nonprofits.

501(c)3 • $250M-$1B nonprofits • Source year 2024

3.85x

Higher debt load relative to revenue than 91% of similar nonprofits.

501(c)3 • $250M-$1B nonprofits • Source year 2024

-29%

Higher net margin than 6% of similar nonprofits.

501(c)3 • $250M-$1B nonprofits • Source year 2024

Higher top officer pay than 3% of similar nonprofits.

Top officer pay equals 0.0% of source-year revenue.

501(c)3 • $250M-$1B nonprofits • Source year 2024

-3.5%

Faster asset growth than 13% of similar nonprofits.

501(c)3 • $250M-$1B nonprofits • Annualized from 2023 to 2024

87%

Faster revenue growth than 94% of similar nonprofits.

501(c)3 • $250M-$1B nonprofits • Annualized from 2023 to 2024

Balance Sheet

Liabilities / Assets83rd percentile

Assets

Down

$288,588,991

Down $10,458,704 (-3.5%) from 2023

Liabilities

Down

$234,984,000

Down $7,691,541 (-3.2%) from 2023

Net Assets

Down

$53,604,991

Down $2,767,163 (-4.9%) from 2023

Operations

Liabilities / Revenue91st percentile Net Margin6th percentile

Revenue

$61,046,275

Up $28,466,798 (+87%) from 2023

Expenses

$78,951,810

Up $42,705,534 (+118%) from 2023

Net Income

Down

-$17,905,535

Down $14,238,736 (-388%) from 2023

Trend Graphs

Balance Sheet Trend

Asset Growth13th percentile

Grouped bars show assets, liabilities, and net assets across loaded filings.

Highlighted filing

2024

Assets$288,588,991

Liabilities$234,984,000

Net Assets$53,604,991

Open 2024 Filing

Operations Trend

Revenue Growth94th percentile

Revenue, expenses, and net income by year, with the latest filing highlighted.

Highlighted filing

2024

Revenue$61,046,275

Expenses$78,951,810

Net Income-$17,905,535

Open 2024 Filing

Filings

Most recent year

2024 • Form 990Detailed filing. Detailed filing data is available for this year.

Open filing

Assets: $288,588,991
Liabilities: $234,984,000
Net assets: $53,604,991
Revenue: $61,046,275
Expenses: $78,951,810
Net income: -$17,905,535

	Balance Sheet			Operations
Year	Assets	Liabilities	Net Assets	Revenue	Expenses	Net Income
2024Detailed filing. Detailed filing data is available for this year.	$289	$235	$53.6	$61.0	$79.0	$17.9
2023XML pending. An XML filing is linked for this year, but detailed extraction is still pending.	$299	$243	$56.4	$32.6	$36.2	$3.67
2022XML pending. An XML filing is linked for this year, but detailed extraction is still pending.	$331	$271	$59.6	$16.6	$53.8	$37.2
2021XML pending. An XML filing is linked for this year, but detailed extraction is still pending.	$366	$220	$146	$38.8	$54.7	$15.8
2020Detailed filing. Detailed filing data is available for this year.	$267	$186	$81.1	$30.1	$20.3	$9.83

Latest Filing Detail

Jump To

Filing Snapshot

Filing Period: Jul 1, 2023 to Jun 30, 2024
Signed: May 15, 2025
Return Version: 2023v6.0
Gross Receipts: $66,431,718

Mission and Program Overview

Mission

SEE SCHEDULE O

Balance Sheet Detail

Line	Beginning	End	Change
Assets
Investments Other Securities	$216,296,741	$205,832,120	▼ $10,464,621
Investments in Publicly Traded Securities	$82,750,954	$77,067,729	▼ $5,683,225
Savings and Temporary Cash Investments	$0	$5,689,142	▲ $5,689,142
Cash and Non-Interest-Bearing Accounts	$0	$0	→ $0
Accounts Receivable	$0	$0	→ $0
Other Notes and Loans Receivable, Net	$0	$0	→ $0
Pledges and Grants Receivable	$0	$0	→ $0
Receivable From Disqualified Prsn	$0	$0	→ $0
Receivables From Officers Etc	$0	$0	→ $0
Investments Program Related	$0	$0	→ $0
Land, Buildings, and Equipment, Net	$0	$0	→ $0
Intangible Assets	$0	$0	→ $0
Inventories for Sale or Use	$0	$0	→ $0
Loans From Officers Directors	$0	$0	→ $0
Prepaid Expenses and Deferred Charges	$0	$0	→ $0
Total Assets	$299,047,695	$288,588,991	▼ $10,458,704
Other Assets Total	$0	$0	→ $0
Liabilities
Other Liabilities	$242,675,541	$234,984,000	▼ $7,691,541
Accounts Payable and Accrued Expenses	$0	$0	→ $0
Grants Payable	$0	$0	→ $0
Mortgage Notes Payable Secured by Investment Property	$0	$0	→ $0
Unsecured Notes Loans Payable	$0	$0	→ $0
Deferred Revenue	$0	$0	→ $0
Escrow Account Liability	$0	$0	→ $0
Tax Exempt Bond Liabilities	$0	$0	→ $0
Total Liabilities	$242,675,541	$234,984,000	▼ $7,691,541
Net Assets / Fund Balance
Net Assets Without Donor Restrictions	$56,372,154	$53,604,991	▼ $2,767,163
Net Assets With Donor Restrictions	$0	$0	→ $0
Total Net Assets Fund Balance	$56,372,154	$53,604,991	▼ $2,767,163
Total Liabilities and Net Assets / Fund Balance	$299,047,695	$288,588,991	▼ $10,458,704

Asset Categories

Asset	Book Value	Depreciation	Basis
Other Securities	$86,878,776	-	-

Compensation and Service Providers

Top Officer Pay3rd percentile

Board Members and Trustees

Name	Title
University of Chicago	Institutional Trustee

Highest Paid Contractors

Contractor	Services	Location	Compensation
Brennan Burtker LLC	Legal Fees	20 N CLARK ST 1800, Chicago, IL 60602	$1,719,554
Cunningham Meyer	Legal Fees	1 EAST WACKER DRIVE SUITE 2200, Chicago, IL 60601	$874,644
Hall Prangle Schoonveld LLC	Legal Fees	200 S WACKER DR 3300, Chicago, IL 60606	$709,531
Tamos Trucco LLP	Legal Fees	1 E WACKER DR 300, Chicago, IL 60601	$678,489
Johnson Bell Ltd	Legal Fees	33 WEST MONROE STREET SUITE 2700, Chicago, IL 60603	$583,390

Revenue and Support

Revenue Composition

Contributions and Grants: $0
Program Service Revenue: $49,623,060
Investment Income: $11,423,215
Other Revenue: $0
Change in Net Assets: $-17,905,535

Expenses and Functional Allocation

Major Expense Lines

Line Item	Amount
Other Expenses	$78,951,810
Grants and Similar Amounts Paid	$0
Professional Fundraising Fees	$0
Salaries, Compensation, and Employee Benefits	$0
Total Fundraising Expense	$0

Functional Expense Allocation

Line Item	Program	Management	Fundraising	Total
Insurance	$9,607,236	-	-	$9,607,236
Fees for Services Legal	$4,466,762	-	-	$4,466,762
Other Expenses	$1,424,802	-	-	$1,424,802
Interest	$220,848	-	-	$220,848
Total Functional Expenses	$78,951,810	$0	$0	$78,951,810

Fundraising, Events, and Gaming

Fundraising activities: No
Gaming activities: No
Professional fundraiser used: No

Fundraising and Gaming Totals

Line Item	Amount
Fundraising Direct Expenses	$0
Fundraising Gross Income	$0
Gaming Direct Expenses	$0
Gaming Gross Income	$0
Professional Fundraising Fees	$0

Political and Lobbying Activity

Political campaign activity: No
Lobbying activity: No
Subject to proxy tax: No

Insider Transactions and Loans

Loans and Receivables

Line Item	Beginning	End	Change
Loans from Officers, Directors, Trustees, and Key Employees	$0	$0	→ $0
Receivables from Disqualified Persons	$0	$0	→ $0
Receivables from Officers, Directors, Trustees, and Key Employees	$0	$0	→ $0

Related Organizations and Partnerships

Related Tax-Exempt Organizations

Organization	Location	Activity	Code	Public Charity	Controlled
Arch Development Corporation	Chicago, IL, Uk	Tech Transfer	501(c)(3)	12 Type I	No
Asian Health Coalition	Chicago, IL, In	Hc Access.	501(c)(3)	10	No
Chapin Hall Center for Children	Chicago, IL, Sn	Pol Rsrch Ctr	501(c)(3)	7	No
Chicago Home for the Incurables	Chicago, IL, Hk	Supp Research	501(c)(3)	12 Type I	No
Chicago Tumor Institute	Chicago, IL, Fr	Supp Research	501(c)(3)	12 Type I	No
Court Theatre Fund	Chicago, IL	Supp the Arts	501(c)(3)	12 Type I	No
Fermi Forward Discovery Group LLC	Harvey, IL	Management	501(c)(3)	10	No
Fermi Research Alliance LLC	Batavia, IL	Manage Lab	501(c)(3)	7	No
Hymen Milgrom Supporting Organization	Chicago, IL	Supp Ed Rsrch	501(c)(3)	12 Type Iii	No
Ingalls Development Foundation	Harvey, IL	Support	501(c)(3)	12 Type I	No
Ingalls Health Ventures	Harvey, IL	Ambulatory	501(c)(3)	12 Type I	No
Ingalls Home Care	Harvey, IL	Healthcare	501(c)(3)	3	No
Ingalls Memorial Hospital	Harvey, IL	Hospital	501(c)(3)	-	No
Lake Park Associates	Chicago, IL	Prop Holding	501(c)(2)	7	No
National Opinion Research Center	Chicago, IL	So Sci Survey	501(c)(3)	12 Type Iii	No
Primary Healthcare Associates Sc	Chicago, IL	Healthcare	501(c)(3)	-	No
South East Chicago Commission	Chicago, IL	Economic Dev	501(c)(3)	3	No
The John Crerar Foundation	Chicago, IL	Library Supp	501(c)(3)	7	No
The Marine Biological Laboratory	Woods Hole, MA	Rsrch and Ed	501(c)(3)	12 Type I	No
The Quadrangle Club	Chicago, IL	Social Club	501(c)(7)	2	No
Uchicago Medicine Northwest Indiana Inc	-	-	-	-	No
Uchicago Research International Ltd	Chicago, IL	Research	501(c)(3)	12 Type I	No
Ucm Care Network Medical Group Inc	Chicago, IL	Healthcare	501(c)(3)	10	No
Ucm Community Health & Hospital Division	Chicago, IL	Healthcare	501(c)(3)	12 Type I	No
Ucmc Title Holding Corporation	Chicago, IL	Title Holding	501(c)(3)	-	No
Ucmc Title Holding Corporation Ii Nfp	Chicago, IL	Title Holding	-	-	No
Univ of Chicago Booth School of Business	-	Education	-	-	No
Univ of Chicago Booth School of Business	-	Education	-	-	No
Univ of Chicago Charter School Corp	Chicago, IL	Education	501(c)(3)	3	No
Univ of Chicago Fdn in Hong Kong Ltd	-	Fundraising	-	-	No
Univ of Chicago Retiree Medical Trust	Chicago, IL	Medical Trust	501(c)(3)	7	No
University of Chicago	Chicago, IL	Ed.& Research	501(c)(3)	7	No
University of Chicago Cancer Research Fo	Chicago, IL	Supp Research	501(c)(3)	12 Type I	No
University of Chicago Center in Paris	-	Education	-	-	No
University of Chicago Cloisters Club	Chicago, IL	Social Club	501(c)(3)	N/a	No
University of Chicago Medical Center	Chicago, IL	Hospital	501(c)(2)	12 Type I	No
University of Chicago Prop Holding Corp	Chicago, IL	Prop Holding	501(c)(3)	10	No
University of Chicago Trust (india)	Chicago, IL	Fundraising	501(c)(3)	7	No

Related Partnerships and Joint Ventures

Organization	Location	Activity	Income	Assets	Ownership	Managing Partner
Ingalls Same Day Surgery Ltd	Tinley Pk, IL, Cj	Surgery Center	$0	$0	0%	No
Iron Point Real Estate Ptnrs - Te (c) Lp	Fort Worth, TX	Investment	$0	$0	0%	No
Japan Absolute Value Fund Lp	Boston, MA	Investment	$0	$0	0%	No
Needle 2023-1 LLC	San Francisco, CA	Investment	$0	$0	0%	No
Nydig Digital Assets Fund V Lp	New York, NY	Investment	$0	$0	0%	No
Silkroad Asia Value Partners Ii Lp	Addison, TX	Investment	$0	$0	0%	No
Ucmc-solis Off-campus Mammography LLC	-	Mammography	$0	$0	0%	No
Ucmc-solis On-campus Mammography LLC (	Addison, TX	Mammography	$0	$0	0%	No

Debt and Bond Financing

Other Reported Liabilities

Liability	Amount
Actuarially Determined Liability	$234,984,000

Governance and Compliance

Governance Checklist

Compiled or reviewed by an accountant: No
Audit committee: Yes
Business relationship with 35% controlled entity: No
Business relationship with family members: No
Business relationship with organization members: No
Material changes to governing documents: No
Compensation from other sources disclosed: No
CEO compensation reviewed: No
Other officer compensation reviewed: No
Conflict-of-interest policy: No
Audited financial statements prepared: Yes
Key decisions subject to board approval: No
Management duties delegated: No

Governance Explanations

Form 990, Part VI, Line 8B

“Documentation of meetings held by committees of governing body the university of chicago self insurance trust is a trust to settle health care claims asserted by patients claiming professional negligence. The self insurance trust does not have its own governing board. The university of chicago is the sole institutional trustee. The university of chicago has a governing body and documented meetings.”

Form 990, Part VI, Line 11B

“Review of form 990 by governing body prior to filing the form 990, the draft tax return was provided to the vice president for administration and cfo and to the vice president and general counsel of the university of chicago. The university of chicago is the institutional trustee of the self insurance trust.”

Form 990, Part VI, Line 12

“The university of chicago self insurance trust does not have officers or individual trustees. The university of chicago is the institutional trustee of the self insurance trust. The university of chicago has a written conflict of interest policy and the officers and trustees of the university are required to complete conflict of interest questionnaires, which include all related organizations including the self insurance trust.”

Form 990, Part VI, Line 13

“The university of chicago self insurance trust does not have any employees. The university of chicago, the institutional trustee, has a written whistleblower policy.”

Form 990, Part VI, Line 14

“The university of chicago self insurance trust does not have a written document retention policy. The university of chicago, the institutional trustee, does have a written document retention policy.”

Form 990, Part VI, Line 15

“The university of chicago self insurance trust does not have any employees. The university of chicago is the institutional trustee. The university of chicago does have a process to review and approve the compensation of officers and key employees of the university.”

Form 990, Part VI, Line 19

“Required documents available to the public the university of chicago self insurance trust's governing documents would be available upon request at the university of chicago. The self insurance trust does not prepare audited financial statements.”

Filing and Contact Details

Filer

Filer Name: University of Chicago Self Insurance Trust
EIN: 36-3020034
In Care Of: % IVAN SAMSTEIN
Phone: 7737021941
Address: 6054 S DREXEL AVENUE, Chicago, IL 60637

Signing Officer

Name: Ivan Samstein
Title: CFO
Phone: 7737021941
Signed: 2025-05-15
Discuss with paid preparer: Yes

Organization Details

Principal Officer: Ivan Samstein
Formed: 1979
Legal Domicile: Il
Voting Board Members: 1
Independent Board Members: 1
Employees: 0
Volunteers: 0

Preparer

Firm: PwC US Tax LLP
Address: 655 NEW YORK AVE NW SUITE 1100, WASHINGTON, DC 20001
Preparer: Travis L Patton
Phone: 2024141000

Supplemental Narrative

Additional Explanations

Form 990, Part 1, Line 1

“A self insurance program for the purpose of settling health care patient claims asserting professional negligence against the university of chicago, the university of chicago medical center, thier employees and agents.”

Form 990, Part V, Line 1A

“Forms 1099 this organization is an affiliate of the university of chicago. The forms 1099 distributed as part of this entity's activities are done so through the university of chicago.”

Financial Statement Notes

Part X, Line 2

“Fin 48 this organization is an affiliate of the university of chicago. The fin 48 footnote below derives from the consolidated june 30, 2024 financial statements of the university of chicago: the university of chicago is a tax-exempt organization under section 501(c)(3) of the internal revenue code and, except for unrelated business income, is exempt from federal income taxes. There was no provision for income taxes due on unrelated business income in fiscal years 2024 and 2023 and there are no uncertain tax positions considered to be material.”

Raw XML AppendixShowing 400 of 1,261 raw XML fields

This appendix keeps the raw XML leaves available for debugging and edge-case review. The human report above is the primary experience.

Path	#	Value
IRS990/AccountantCompileOrReviewInd	0	false
IRS990/AccountsPayableAccrExpnssGrp/BOYAmt	0	0
IRS990/AccountsPayableAccrExpnssGrp/EOYAmt	0	0
IRS990/AccountsReceivableGrp/BOYAmt	0	0
IRS990/AccountsReceivableGrp/EOYAmt	0	0
IRS990/ActivitiesConductedPrtshpInd	0	false
IRS990/ActivityOrMissionDesc	0	SEE SCHEDULE O
IRS990/AdvertisingGrp/TotalAmt	0	0
IRS990/AuditCommitteeInd	0	true
IRS990/BenefitsToMembersGrp/TotalAmt	0	0
IRS990/BooksInCareOfDetail/PersonNm	0	IVAN SAMSTEIN
IRS990/BooksInCareOfDetail/PhoneNum	0	7738345819
IRS990/BooksInCareOfDetail/USAddress/AddressLine1Txt	0	6054 S DREXEL AVENUE
IRS990/BooksInCareOfDetail/USAddress/CityNm	0	CHICAGO
IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd	0	IL
IRS990/BooksInCareOfDetail/USAddress/ZIPCd	0	60637
IRS990/BusinessRlnWith35CtrlEntInd	0	false
IRS990/BusinessRlnWithFamMemInd	0	false
IRS990/BusinessRlnWithOrgMemInd	0	false
IRS990/CashNonInterestBearingGrp/BOYAmt	0	0
IRS990/CashNonInterestBearingGrp/EOYAmt	0	0
IRS990/ChangeToOrgDocumentsInd	0	false
IRS990/CntrctRcvdGreaterThan100KCnt	0	10
IRS990/CollectionsOfArtInd	0	false
IRS990/CompCurrentOfcrDirectorsGrp/TotalAmt	0	0
IRS990/CompDisqualPersonsGrp/TotalAmt	0	0
IRS990/CompensationFromOtherSrcsInd	0	false
IRS990/CompensationProcessCEOInd	0	false
IRS990/CompensationProcessOtherInd	0	false
IRS990/ConferencesMeetingsGrp/TotalAmt	0	0
IRS990/ConflictOfInterestPolicyInd	0	false
IRS990/ConservationEasementsInd	0	false
IRS990/ConsolidatedAuditFinclStmtInd	0	true
IRS990/ContractorCompensationGrp/CompensationAmt	0	1719554
IRS990/ContractorCompensationGrp/CompensationAmt	1	874644
IRS990/ContractorCompensationGrp/CompensationAmt	2	709531
IRS990/ContractorCompensationGrp/CompensationAmt	3	678489
IRS990/ContractorCompensationGrp/CompensationAmt	4	583390
IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt	0	20 N CLARK ST 1800
IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt	1	1 EAST WACKER DRIVE SUITE 2200
IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt	2	200 S WACKER DR 3300
IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt	3	1 E WACKER DR 300
IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt	4	33 WEST MONROE STREET SUITE 2700
IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm	0	CHICAGO
IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm	1	CHICAGO
IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm	2	CHICAGO
IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm	3	CHICAGO
IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm	4	CHICAGO
IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd	0	IL
IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd	1	IL
IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd	2	IL
IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd	3	IL
IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd	4	IL
IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd	0	60602
IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd	1	60601
IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd	2	60606
IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd	3	60601
IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd	4	60603
IRS990/ContractorCompensationGrp/ContractorName/PersonNm	0	BRENNAN BURTKER LLC
IRS990/ContractorCompensationGrp/ContractorName/PersonNm	1	CUNNINGHAM MEYER
IRS990/ContractorCompensationGrp/ContractorName/PersonNm	2	HALL PRANGLE SCHOONVELD LLC
IRS990/ContractorCompensationGrp/ContractorName/PersonNm	3	TAMOS TRUCCO LLP
IRS990/ContractorCompensationGrp/ContractorName/PersonNm	4	JOHNSON BELL LTD
IRS990/ContractorCompensationGrp/ServicesDesc	0	LEGAL FEES
IRS990/ContractorCompensationGrp/ServicesDesc	1	LEGAL FEES
IRS990/ContractorCompensationGrp/ServicesDesc	2	LEGAL FEES
IRS990/ContractorCompensationGrp/ServicesDesc	3	LEGAL FEES
IRS990/ContractorCompensationGrp/ServicesDesc	4	LEGAL FEES
IRS990/CostOfGoodsSoldAmt	0	0
IRS990/CreditCounselingInd	0	false
IRS990/CYBenefitsPaidToMembersAmt	0	0
IRS990/CYContributionsGrantsAmt	0	0
IRS990/CYGrantsAndSimilarPaidAmt	0	0
IRS990/CYInvestmentIncomeAmt	0	11423215
IRS990/CYOtherExpensesAmt	0	78951810
IRS990/CYOtherRevenueAmt	0	0
IRS990/CYProgramServiceRevenueAmt	0	49623060
IRS990/CYRevenuesLessExpensesAmt	0	-17905535
IRS990/CYSalariesCompEmpBnftPaidAmt	0	0
IRS990/CYTotalExpensesAmt	0	78951810
IRS990/CYTotalFundraisingExpenseAmt	0	0
IRS990/CYTotalProfFndrsngExpnsAmt	0	0
IRS990/CYTotalRevenueAmt	0	61046275
IRS990/DecisionsSubjectToApprovaInd	0	false
IRS990/DeductibleArtContributionInd	0	false
IRS990/DeductibleNonCashContriInd	0	false
IRS990/DeferredRevenueGrp/BOYAmt	0	0
IRS990/DeferredRevenueGrp/EOYAmt	0	0
IRS990/DelegationOfMgmtDutiesInd	0	false
IRS990/DepreciationDepletionGrp/TotalAmt	0	0
IRS990/Desc	0	PAYMENTS FROM THE TRUST FOR SETTLING HEALTH CARE CLAIMS ASSERTING PROFESSIONAL NEGLIGENCE. OTHER PROGRAM SERVICE IF DONE DURING THE YEAR: EXCESS INSURANCE PREMIUMS FOR CLAIMS EXCEEDING THE SELF INSURED RETENTION. MISCELLANEOUS EXPENSES RELATED TO THE PROGRAM FOR ACTUARIAL SERVICES AND OTHER MISCELLANEOUS EXPENSES.
IRS990/DescribedInSection501c3Ind	0	true
IRS990/DisregardedEntityInd	0	false
IRS990/DocumentRetentionPolicyInd	0	false
IRS990/DonorAdvisedFundInd	0	false
IRS990/DonorRestrictionNetAssetsGrp/BOYAmt	0	0
IRS990/DonorRestrictionNetAssetsGrp/EOYAmt	0	0
IRS990/DonorRstrOrQuasiEndowmentsInd	0	false
IRS990/ElectionOfBoardMembersInd	0	false
IRS990/EmployeeCnt	0	0
IRS990/EngagedInExcessBenefitTransInd	0	false
IRS990/EscrowAccountLiabilityGrp/BOYAmt	0	0
IRS990/EscrowAccountLiabilityGrp/EOYAmt	0	0
IRS990/ExpenseAmt	0	78951810
IRS990/FamilyOrBusinessRlnInd	0	false
IRS990/FederalGrantAuditRequiredInd	0	false
IRS990/FeesForServicesAccountingGrp/TotalAmt	0	0
IRS990/FeesForServicesLegalGrp/ProgramServicesAmt	0	4466762
IRS990/FeesForServicesLegalGrp/TotalAmt	0	4466762
IRS990/FeesForServicesLobbyingGrp/TotalAmt	0	0
IRS990/FeesForServicesManagementGrp/TotalAmt	0	0
IRS990/FeesForServicesOtherGrp/TotalAmt	0	0
IRS990/FeesForServicesProfFundraising/TotalAmt	0	0
IRS990/FeesForSrvcInvstMgmntFeesGrp/TotalAmt	0	0
IRS990/ForeignActivitiesInd	0	false
IRS990/ForeignFinancialAccountInd	0	false
IRS990/ForeignGrantsGrp/TotalAmt	0	0
IRS990/ForeignOfficeInd	0	false
IRS990/Form8282PropertyDisposedOfInd	0	false
IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt	0	0.0
IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt	0	0.0
IRS990/Form990PartVIISectionAGrp/InstitutionalTrusteeInd	0	X
IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt	0	0
IRS990/Form990PartVIISectionAGrp/PersonNm	0	UNIVERSITY OF CHICAGO
IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt	0	0
IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt	0	0
IRS990/Form990PartVIISectionAGrp/TitleTxt	0	INSTITUTIONAL TRUSTEE
IRS990/Form990ProvidedToGvrnBodyInd	0	true
IRS990/FormationYr	0	1979
IRS990/FormerOfcrEmployeesListedInd	0	false
IRS990/FSAuditedBasisGrp/ConsolidatedBasisFinclStmtInd	0	X
IRS990/FSAuditedInd	0	true
IRS990/FundraisingActivitiesInd	0	false
IRS990/FundraisingDirectExpensesAmt	0	0
IRS990/FundraisingGrossIncomeAmt	0	0
IRS990/GainOrLossGrp/OtherAmt	0	-5385443
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IRS990/GamingDirectExpensesAmt	0	0
IRS990/GamingGrossIncomeAmt	0	0
IRS990/GoverningBodyVotingMembersCnt	0	1
IRS990/GrantAmt	0	0
IRS990/GrantsPayableGrp/BOYAmt	0	0
IRS990/GrantsPayableGrp/EOYAmt	0	0
IRS990/GrantsToDomesticIndividualsGrp/TotalAmt	0	0
IRS990/GrantsToDomesticOrgsGrp/TotalAmt	0	0
IRS990/GrantsToIndividualsInd	0	false
IRS990/GrantsToOrganizationsInd	0	false
IRS990/GrantToRelatedPersonInd	0	false
IRS990/GrossAmountSalesAssetsGrp/OtherAmt	0	0
IRS990/GrossReceiptsAmt	0	66431718
IRS990/GrossSalesOfInventoryAmt	0	0
IRS990/GroupReturnForAffiliatesInd	0	false
IRS990/IncludeFIN48FootnoteInd	0	true
IRS990/IncmFromInvestBondProceedsGrp/TotalRevenueColumnAmt	0	0
IRS990/IndependentAuditFinclStmtInd	0	false
IRS990/IndependentVotingMemberCnt	0	1
IRS990/IndivRcvdGreaterThan100KCnt	0	0
IRS990/IndoorTanningServicesInd	0	false
IRS990/InfoInScheduleOPartVIInd	0	X
IRS990/InfoInScheduleOPartVInd	0	X
IRS990/InformationTechnologyGrp/TotalAmt	0	0
IRS990/InsuranceGrp/ProgramServicesAmt	0	9607236
IRS990/InsuranceGrp/TotalAmt	0	9607236
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IRS990/IntangibleAssetsGrp/EOYAmt	0	0
IRS990/InterestGrp/ProgramServicesAmt	0	220848
IRS990/InterestGrp/TotalAmt	0	220848
IRS990/InventoriesForSaleOrUseGrp/BOYAmt	0	0
IRS990/InventoriesForSaleOrUseGrp/EOYAmt	0	0
IRS990/InvestmentIncomeGrp/ExclusionAmt	0	16808658
IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt	0	16808658
IRS990/InvestmentInJointVentureInd	0	false
IRS990/InvestmentsOtherSecuritiesGrp/BOYAmt	0	216296741
IRS990/InvestmentsOtherSecuritiesGrp/EOYAmt	0	205832120
IRS990/InvestmentsProgramRelatedGrp/BOYAmt	0	0
IRS990/InvestmentsProgramRelatedGrp/EOYAmt	0	0
IRS990/InvestmentsPubTradedSecGrp/BOYAmt	0	82750954
IRS990/InvestmentsPubTradedSecGrp/EOYAmt	0	77067729
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IRS990/IRPDocumentW2GCnt	0	0
IRS990/LandBldgEquipBasisNetGrp/BOYAmt	0	0
IRS990/LandBldgEquipBasisNetGrp/EOYAmt	0	0
IRS990/LegalDomicileStateCd	0	IL
IRS990/LessCostOthBasisSalesExpnssGrp/OtherAmt	0	5385443
IRS990/LoanOutstandingInd	0	false
IRS990/LoansFromOfficersDirectorsGrp/BOYAmt	0	0
IRS990/LoansFromOfficersDirectorsGrp/EOYAmt	0	0
IRS990/LobbyingActivitiesInd	0	false
IRS990/LocalChaptersInd	0	false
IRS990/MaterialDiversionOrMisuseInd	0	false
IRS990/MembersOrStockholdersInd	0	false
IRS990/MethodOfAccountingAccrualInd	0	X
IRS990/MinutesOfCommitteesInd	0	false
IRS990/MinutesOfGoverningBodyInd	0	true
IRS990/MissionDesc	0	A SELF INSURANCE PROGRAM FOR THE PURPOSE OF SETTLING HEALTH CARE PATIENT CLAIMS ASSERTING PROFESSIONAL NEGLIGENCE AGAINST THE UNIVERSITY OF CHICAGO, THE UNIVERSITY OF CHICAGO MEDICAL CENTER, THIER EMPLOYEES AND AGENTS.
IRS990/MoreThan5000KToIndividualsInd	0	false
IRS990/MoreThan5000KToOrgInd	0	false
IRS990/MortgNotesPyblScrdInvstPropGrp/BOYAmt	0	0
IRS990/MortgNotesPyblScrdInvstPropGrp/EOYAmt	0	0
IRS990/NetAssetsOrFundBalancesBOYAmt	0	56372154
IRS990/NetAssetsOrFundBalancesEOYAmt	0	53604991
IRS990/NetGainOrLossInvestmentsGrp/ExclusionAmt	0	-5385443
IRS990/NetGainOrLossInvestmentsGrp/TotalRevenueColumnAmt	0	-5385443
IRS990/NetIncmFromFundraisingEvtGrp/TotalRevenueColumnAmt	0	0
IRS990/NetIncomeFromGamingGrp/TotalRevenueColumnAmt	0	0
IRS990/NetIncomeOrLossGrp/TotalRevenueColumnAmt	0	0
IRS990/NetRentalIncomeOrLossGrp/TotalRevenueColumnAmt	0	0
IRS990/NetUnrelatedBusTxblIncmAmt	0	0
IRS990/NetUnrlzdGainsLossesInvstAmt	0	15138372
IRS990/NoDonorRestrictionNetAssetsGrp/BOYAmt	0	56372154
IRS990/NoDonorRestrictionNetAssetsGrp/EOYAmt	0	53604991
IRS990/NoListedPersonsCompensatedInd	0	X
IRS990/NondeductibleContributionsInd	0	false
IRS990/OccupancyGrp/TotalAmt	0	0
IRS990/OfficeExpensesGrp/TotalAmt	0	0
IRS990/OfficerMailingAddressInd	0	false
IRS990/OperateHospitalInd	0	false
IRS990/Organization501c3Ind	0	X
IRS990/OrganizationFollowsFASB117Ind	0	X
IRS990/OtherAssetsTotalGrp/BOYAmt	0	0
IRS990/OtherAssetsTotalGrp/EOYAmt	0	0
IRS990/OtherEmployeeBenefitsGrp/TotalAmt	0	0
IRS990/OtherExpensesGrp/Desc	0	CLAIMS PAID
IRS990/OtherExpensesGrp/Desc	1	OTHER EXPENSES
IRS990/OtherExpensesGrp/ProgramServicesAmt	0	63232162
IRS990/OtherExpensesGrp/ProgramServicesAmt	1	1424802
IRS990/OtherExpensesGrp/TotalAmt	0	63232162
IRS990/OtherExpensesGrp/TotalAmt	1	1424802
IRS990/OtherLiabilitiesGrp/BOYAmt	0	242675541
IRS990/OtherLiabilitiesGrp/EOYAmt	0	234984000
IRS990/OtherRevenueTotalAmt	0	0
IRS990/OtherSalariesAndWagesGrp/TotalAmt	0	0
IRS990/OthNotesLoansReceivableNetGrp/BOYAmt	0	0
IRS990/OthNotesLoansReceivableNetGrp/EOYAmt	0	0
IRS990/PartialLiquidationInd	0	false
IRS990/PaymentsToAffiliatesGrp/TotalAmt	0	0
IRS990/PayPremiumsPrsnlBnftCntrctInd	0	false
IRS990/PayrollTaxesGrp/TotalAmt	0	0
IRS990/PensionPlanContributionsGrp/TotalAmt	0	0
IRS990/PledgesAndGrantsReceivableGrp/BOYAmt	0	0
IRS990/PledgesAndGrantsReceivableGrp/EOYAmt	0	0
IRS990/PoliticalCampaignActyInd	0	false
IRS990/PrepaidExpensesDefrdChargesGrp/BOYAmt	0	0
IRS990/PrepaidExpensesDefrdChargesGrp/EOYAmt	0	0
IRS990/PrincipalOfficerNm	0	IVAN SAMSTEIN
IRS990/ProfessionalFundraisingInd	0	false
IRS990/ProgramServiceRevenueGrp/BusinessCd	0	900099
IRS990/ProgramServiceRevenueGrp/Desc	0	CONTRIBUTIONS TO THE TRUST
IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt	0	49623060
IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt	0	49623060
IRS990/ProhibitedTaxShelterTransInd	0	false
IRS990/PYBenefitsPaidToMembersAmt	0	0
IRS990/PYContributionsGrantsAmt	0	0
IRS990/PYExcessBenefitTransInd	0	false
IRS990/PYGrantsAndSimilarPaidAmt	0	0
IRS990/PYInvestmentIncomeAmt	0	8213619
IRS990/PymtTravelEntrtnmntPubOfclGrp/TotalAmt	0	0
IRS990/PYOtherExpensesAmt	0	36246276
IRS990/PYOtherRevenueAmt	0	0
IRS990/PYProgramServiceRevenueAmt	0	24365858
IRS990/PYRevenuesLessExpensesAmt	0	-3666799
IRS990/PYSalariesCompEmpBnftPaidAmt	0	0
IRS990/PYTotalExpensesAmt	0	36246276
IRS990/PYTotalProfFndrsngExpnsAmt	0	0
IRS990/PYTotalRevenueAmt	0	32579477
IRS990/QuidProQuoContributionsInd	0	false
IRS990/RcvblFromDisqualifiedPrsnGrp/BOYAmt	0	0
IRS990/RcvblFromDisqualifiedPrsnGrp/EOYAmt	0	0
IRS990/RcvFndsToPayPrsnlBnftCntrctInd	0	false
IRS990/ReceivablesFromOfficersEtcGrp/BOYAmt	0	0
IRS990/ReceivablesFromOfficersEtcGrp/EOYAmt	0	0
IRS990/ReconcilationRevenueExpnssAmt	0	-17905535
IRS990/RelatedEntityInd	0	true
IRS990/RelatedOrganizationCtrlEntInd	0	false
IRS990/RentalIncomeOrLossGrp/PersonalAmt	0	0
IRS990/RentalIncomeOrLossGrp/RealAmt	0	0
IRS990/ReportInvestmentsOtherSecInd	0	true
IRS990/ReportLandBuildingEquipmentInd	0	false
IRS990/ReportOtherAssetsInd	0	false
IRS990/ReportOtherLiabilitiesInd	0	true
IRS990/ReportProgramRelatedInvstInd	0	false
IRS990/RevenueAmt	0	49623060
IRS990/RoyaltiesGrp/TotalAmt	0	0
IRS990/RoyaltiesRevenueGrp/TotalRevenueColumnAmt	0	0
IRS990/SavingsAndTempCashInvstGrp/BOYAmt	0	0
IRS990/SavingsAndTempCashInvstGrp/EOYAmt	0	5689142
IRS990ScheduleA/Form990SchASupportingOrgGrp/Contribution35ControlledInd	0	false
IRS990ScheduleA/Form990SchASupportingOrgGrp/ContributionControllerInd	0	false
IRS990ScheduleA/Form990SchASupportingOrgGrp/ContributionFamilyInd	0	false
IRS990ScheduleA/Form990SchASupportingOrgGrp/ControlledDisqualifiedPrsnInd	0	false
IRS990ScheduleA/Form990SchASupportingOrgGrp/DisqualifiedPrsnControllIntInd	0	false
IRS990ScheduleA/Form990SchASupportingOrgGrp/DisqualifiedPrsnOwnrIntInd	0	false
IRS990ScheduleA/Form990SchASupportingOrgGrp/ExcessBusinessHoldingsRulesInd	0	false
IRS990ScheduleA/Form990SchASupportingOrgGrp/ListedByNameGoverningDocInd	0	true
IRS990ScheduleA/Form990SchASupportingOrgGrp/LoanDisqualifiedPersonInd	0	false
IRS990ScheduleA/Form990SchASupportingOrgGrp/OrganizationChangeSuprtOrgInd	0	false
IRS990ScheduleA/Form990SchASupportingOrgGrp/PaymentSubstantialContribtrInd	0	false
IRS990ScheduleA/Form990SchASupportingOrgGrp/SupportedOrgNotOrganizedUSInd	0	false
IRS990ScheduleA/Form990SchASupportingOrgGrp/SupportedOrgSectionC456Ind	0	false
IRS990ScheduleA/Form990SchASupportingOrgGrp/SupportNonSupportedOrgInd	0	false
IRS990ScheduleA/Form990SchASupportingOrgGrp/SuprtOrgNoIRSDeterminationInd	0	false
IRS990ScheduleA/Form990SchAType1SuprtOrgGrp/OperateBenefitNonSuprtOrgInd	0	false
IRS990ScheduleA/Form990SchAType1SuprtOrgGrp/PowerAppointMajorityDirTrstInd	0	true
IRS990ScheduleA/OtherSupportSumAmt	0	0
IRS990ScheduleA/SupportedOrganizationsCnt	0	1
IRS990ScheduleA/SupportedOrganizationsTotalCnt	0	1
IRS990ScheduleA/SupportedOrgInformationGrp/EIN	0	362177139
IRS990ScheduleA/SupportedOrgInformationGrp/GoverningDocumentListedInd	0	true
IRS990ScheduleA/SupportedOrgInformationGrp/OrganizationTypeCd	0	2
IRS990ScheduleA/SupportedOrgInformationGrp/OtherSupportAmt	0	0
IRS990ScheduleA/SupportedOrgInformationGrp/SupportAmt	0	0
IRS990ScheduleA/SupportedOrgInformationGrp/SupportedOrganizationName/BusinessNameLine1Txt	0	UNIVERSITY OF CHICAGO
IRS990ScheduleA/SupportingOrganization509a3Ind	0	X
IRS990ScheduleA/SupportingOrgType1Ind	0	X
IRS990ScheduleA/SupportSumAmt	0	0
IRS990/ScheduleBRequiredInd	0	false
IRS990ScheduleD/FederalIncomeTaxLiabilityAmt	0	0
IRS990ScheduleD/FootnoteTextInd	0	X
IRS990ScheduleD/OtherLiabilitiesOrgGrp/Amt	0	234984000
IRS990ScheduleD/OtherLiabilitiesOrgGrp/Desc	0	ACTUARIALLY DETERMINED LIABILITY
IRS990ScheduleD/OtherSecuritiesGrp/BookValueAmt	0	28139547
IRS990ScheduleD/OtherSecuritiesGrp/BookValueAmt	1	18677038
IRS990ScheduleD/OtherSecuritiesGrp/BookValueAmt	2	72136759
IRS990ScheduleD/OtherSecuritiesGrp/BookValueAmt	3	86878776
IRS990ScheduleD/OtherSecuritiesGrp/Desc	0	CLOSELY HELD EQUITIES
IRS990ScheduleD/OtherSecuritiesGrp/Desc	1	FIXED INCOME
IRS990ScheduleD/OtherSecuritiesGrp/Desc	2	REAL ASSETS AND ABSOLUTE RET
IRS990ScheduleD/OtherSecuritiesGrp/Desc	3	PRIVATE DEBT
IRS990ScheduleD/OtherSecuritiesGrp/MethodValuationCd	0	F
IRS990ScheduleD/OtherSecuritiesGrp/MethodValuationCd	1	F
IRS990ScheduleD/OtherSecuritiesGrp/MethodValuationCd	2	F
IRS990ScheduleD/OtherSecuritiesGrp/MethodValuationCd	3	F
IRS990ScheduleD/SupplementalInformationDetail/ExplanationTxt	0	FIN 48 THIS ORGANIZATION IS AN AFFILIATE OF THE UNIVERSITY OF CHICAGO. THE FIN 48 FOOTNOTE BELOW DERIVES FROM THE CONSOLIDATED JUNE 30, 2024 FINANCIAL STATEMENTS OF THE UNIVERSITY OF CHICAGO: THE UNIVERSITY OF CHICAGO IS A TAX-EXEMPT ORGANIZATION UNDER SECTION 501(C)(3) OF THE INTERNAL REVENUE CODE AND, EXCEPT FOR UNRELATED BUSINESS INCOME, IS EXEMPT FROM FEDERAL INCOME TAXES. THERE WAS NO PROVISION FOR INCOME TAXES DUE ON UNRELATED BUSINESS INCOME IN FISCAL YEARS 2024 AND 2023 AND THERE ARE NO UNCERTAIN TAX POSITIONS CONSIDERED TO BE MATERIAL.
IRS990ScheduleD/SupplementalInformationDetail/FormAndLineReferenceDesc	0	PART X, LINE 2
IRS990ScheduleD/TotalBookValueSecuritiesAmt	0	205832120
IRS990ScheduleD/TotalLiabilityAmt	0	234984000
IRS990/ScheduleJRequiredInd	0	false
IRS990/ScheduleORequiredInd	0	true
IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt	0	A SELF INSURANCE PROGRAM FOR THE PURPOSE OF SETTLING HEALTH CARE PATIENT CLAIMS ASSERTING PROFESSIONAL NEGLIGENCE AGAINST THE UNIVERSITY OF CHICAGO, THE UNIVERSITY OF CHICAGO MEDICAL CENTER, THIER EMPLOYEES AND AGENTS.
IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt	1	FORMS 1099 THIS ORGANIZATION IS AN AFFILIATE OF THE UNIVERSITY OF CHICAGO. THE FORMS 1099 DISTRIBUTED AS PART OF THIS ENTITY'S ACTIVITIES ARE DONE SO THROUGH THE UNIVERSITY OF CHICAGO.
IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt	2	DOCUMENTATION OF MEETINGS HELD BY COMMITTEES OF GOVERNING BODY THE UNIVERSITY OF CHICAGO SELF INSURANCE TRUST IS A TRUST TO SETTLE HEALTH CARE CLAIMS ASSERTED BY PATIENTS CLAIMING PROFESSIONAL NEGLIGENCE. THE SELF INSURANCE TRUST DOES NOT HAVE ITS OWN GOVERNING BOARD. THE UNIVERSITY OF CHICAGO IS THE SOLE INSTITUTIONAL TRUSTEE. THE UNIVERSITY OF CHICAGO HAS A GOVERNING BODY AND DOCUMENTED MEETINGS.
IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt	3	REVIEW OF FORM 990 BY GOVERNING BODY PRIOR TO FILING THE FORM 990, THE DRAFT TAX RETURN WAS PROVIDED TO THE VICE PRESIDENT FOR ADMINISTRATION AND CFO AND TO THE VICE PRESIDENT AND GENERAL COUNSEL OF THE UNIVERSITY OF CHICAGO. THE UNIVERSITY OF CHICAGO IS THE INSTITUTIONAL TRUSTEE OF THE SELF INSURANCE TRUST.
IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt	4	THE UNIVERSITY OF CHICAGO SELF INSURANCE TRUST DOES NOT HAVE OFFICERS OR INDIVIDUAL TRUSTEES. THE UNIVERSITY OF CHICAGO IS THE INSTITUTIONAL TRUSTEE OF THE SELF INSURANCE TRUST. THE UNIVERSITY OF CHICAGO HAS A WRITTEN CONFLICT OF INTEREST POLICY AND THE OFFICERS AND TRUSTEES OF THE UNIVERSITY ARE REQUIRED TO COMPLETE CONFLICT OF INTEREST QUESTIONNAIRES, WHICH INCLUDE ALL RELATED ORGANIZATIONS INCLUDING THE SELF INSURANCE TRUST.
IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt	5	THE UNIVERSITY OF CHICAGO SELF INSURANCE TRUST DOES NOT HAVE ANY EMPLOYEES. THE UNIVERSITY OF CHICAGO, THE INSTITUTIONAL TRUSTEE, HAS A WRITTEN WHISTLEBLOWER POLICY.
IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt	6	THE UNIVERSITY OF CHICAGO SELF INSURANCE TRUST DOES NOT HAVE A WRITTEN DOCUMENT RETENTION POLICY. THE UNIVERSITY OF CHICAGO, THE INSTITUTIONAL TRUSTEE, DOES HAVE A WRITTEN DOCUMENT RETENTION POLICY.
IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt	7	THE UNIVERSITY OF CHICAGO SELF INSURANCE TRUST DOES NOT HAVE ANY EMPLOYEES. THE UNIVERSITY OF CHICAGO IS THE INSTITUTIONAL TRUSTEE. THE UNIVERSITY OF CHICAGO DOES HAVE A PROCESS TO REVIEW AND APPROVE THE COMPENSATION OF OFFICERS AND KEY EMPLOYEES OF THE UNIVERSITY.
IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt	8	REQUIRED DOCUMENTS AVAILABLE TO THE PUBLIC THE UNIVERSITY OF CHICAGO SELF INSURANCE TRUST'S GOVERNING DOCUMENTS WOULD BE AVAILABLE UPON REQUEST AT THE UNIVERSITY OF CHICAGO. THE SELF INSURANCE TRUST DOES NOT PREPARE AUDITED FINANCIAL STATEMENTS.
IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc	0	FORM 990, PART 1, LINE 1
IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc	1	FORM 990, PART V, LINE 1A
IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc	2	FORM 990, PART VI, LINE 8B
IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc	3	FORM 990, PART VI, LINE 11B
IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc	4	FORM 990, PART VI, LINE 12
IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc	5	FORM 990, PART VI, LINE 13
IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc	6	FORM 990, PART VI, LINE 14
IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc	7	FORM 990, PART VI, LINE 15
IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc	8	FORM 990, PART VI, LINE 19
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IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/ControlledOrganizationInd	1	false
IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/ControlledOrganizationInd	2	false
IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/ControlledOrganizationInd	3	false
IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/ControlledOrganizationInd	4	false
IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/ControlledOrganizationInd	5	false
IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/ControlledOrganizationInd	6	false
IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/ControlledOrganizationInd	7	false
IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/ControlledOrganizationInd	8	false
IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/ControlledOrganizationInd	9	false
IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/ControlledOrganizationInd	10	false
IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/ControlledOrganizationInd	11	false
IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/ControlledOrganizationInd	12	false
IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/ControlledOrganizationInd	13	false
IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/ControlledOrganizationInd	14	false
IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/ControlledOrganizationInd	15	false
IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/ControlledOrganizationInd	16	false
IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/ControlledOrganizationInd	17	false
IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/ControlledOrganizationInd	18	false
IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/DirectControllingEntityName/BusinessNameLine1Txt	0	NA
IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/DirectControllingEntityName/BusinessNameLine1Txt	1	NA
IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/DirectControllingEntityName/BusinessNameLine1Txt	2	NA
IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/DirectControllingEntityName/BusinessNameLine1Txt	3	NA
IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/DirectControllingEntityName/BusinessNameLine1Txt	4	NA
IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/DirectControllingEntityName/BusinessNameLine1Txt	5	NA
IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/DirectControllingEntityName/BusinessNameLine1Txt	6	NA
IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/DirectControllingEntityName/BusinessNameLine1Txt	7	NA
IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/DirectControllingEntityName/BusinessNameLine1Txt	8	NA
IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/DirectControllingEntityName/BusinessNameLine1Txt	9	NA
IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/DirectControllingEntityName/BusinessNameLine1Txt	10	NA
IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/DirectControllingEntityName/BusinessNameLine1Txt	11	NA
IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/DirectControllingEntityName/BusinessNameLine1Txt	12	NA
IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/DirectControllingEntityName/BusinessNameLine1Txt	13	NA
IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/DirectControllingEntityName/BusinessNameLine1Txt	14	NA
IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/DirectControllingEntityName/BusinessNameLine1Txt	15	NA
IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/DirectControllingEntityName/BusinessNameLine1Txt	16	NA
IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/DirectControllingEntityName/BusinessNameLine1Txt	17	NA
IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/DirectControllingEntityName/BusinessNameLine1Txt	18	NA
IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/EIN	0	363485578
IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/EIN	1	363374228
IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/EIN	2	981571288
IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/EIN	3	981360251
IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/EIN	4	981571310
IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/EIN	5	981571446

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