v3.25.3
Shareholder Report
 6 Months Ended
Aug. 31, 2025
USD ($)
Holding
Shareholder Report [Line Items]  
Document Type N-CSRS
Amendment Flag false
Registrant Name T. ROWE PRICE TAX-EXEMPT MONEY FUND, INC.
Entity Central Index Key 0000315748
Entity Investment Company Type N-1A
Document Period End Date Aug. 31, 2025
C000005557  
Shareholder Report [Line Items]  
Fund Name Tax-Exempt Money Fund
Class Name Investor Class
Trading Symbol PTEXX
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find the fund’s prospectus, financial information on Form N‑CSR (which includes required tax information for dividends), holdings, proxy voting information, and other information atwww.troweprice.com/prospectus. You can also request this information without charge by contacting T. Rowe Price at 1‑800‑638‑5660 or info@troweprice.com or contacting your intermediary.
Material Fund Change Notice [Text Block]  
Additional Information Phone Number 1‑800‑638‑5660
Additional Information Email <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 13.3333px; font-weight: 400; grid-area: auto; line-height: 17.3333px; margin: 0px; overflow: visible; text-align: justify; text-align-last: left; white-space-collapse: preserve-breaks;">info@troweprice.com</span>
Additional Information Website www.troweprice.com/prospectus
Expenses [Text Block]

What were the fund costs for the last six months? (based on a hypothetical $10,000 investment)

 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Tax-Exempt Money Fund - Investor Class
$23
0.45%
Expenses Paid, Amount $ 23
Expense Ratio, Percent 0.45%
AssetsNet $ 671,351,000
Holdings Count | Holding 198
Additional Fund Statistics [Text Block]

What are some fund statistics?

Fund Statistics

Total Net Assets (000s)
$671,351
Number of Portfolio Holdings
198
Holdings [Text Block]

Security Allocation (as a % of Net Assets)

Other Municipal Security
45.6%
Variable Rate Demand Notes
33.3
Non-Financial Company Commercial Paper
20.8
Short-Term and Other
0.3

Top Ten Holdings (as a % of Net Assets)

New York State Dormitory Auth., Tender Option Bond Trust Receipts
2.5%
Illinois Fin. Auth., Northwestern Univ.
1.8
South Carolina Public Service Auth.
1.8
RIB Floster, Tender Option Bond Trust Receipts
1.8
Houston Combined Utility System
1.7
Virginia Housing Dev. Auth., Tender Option Bond Trust Receipts
1.7
Clark County Dept. of Aviation
1.7
Illinois Fin. Auth., Steppenwolf Theatre Company Project
1.6
Harris County Health Fac. Dev., Methodist Hosp. System
1.6
Univ. of Texas, Board of Regents
1.6
Material Fund Change [Text Block]
Updated Prospectus Web Address www.troweprice.com/paperless
C000193189  
Shareholder Report [Line Items]  
Fund Name Tax-Exempt Money Fund
Class Name I Class
Trading Symbol TERXX
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find the fund’s prospectus, financial information on Form N‑CSR (which includes required tax information for dividends), holdings, proxy voting information, and other information atwww.troweprice.com/prospectus. You can also request this information without charge by contacting T. Rowe Price at 1‑800‑638‑5660 or info@troweprice.com or contacting your intermediary.
Material Fund Change Notice [Text Block]  
Additional Information Phone Number 1‑800‑638‑5660
Additional Information Email <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 13.3333px; font-weight: 400; grid-area: auto; line-height: 17.3333px; margin: 0px; overflow: visible; text-align: justify; text-align-last: left; white-space-collapse: preserve-breaks;">info@troweprice.com</span>
Additional Information Website www.troweprice.com/prospectus
Expenses [Text Block]

What were the fund costs for the last six months? (based on a hypothetical $10,000 investment)

 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Tax-Exempt Money Fund - I Class
$12
0.24%
Expenses Paid, Amount $ 12
Expense Ratio, Percent 0.24%
AssetsNet $ 671,351,000
Holdings Count | Holding 198
Additional Fund Statistics [Text Block]

What are some fund statistics?

Fund Statistics

Total Net Assets (000s)
$671,351
Number of Portfolio Holdings
198
Holdings [Text Block]

Security Allocation (as a % of Net Assets)

Other Municipal Security
45.6%
Variable Rate Demand Notes
33.3
Non-Financial Company Commercial Paper
20.8
Short-Term and Other
0.3

Top Ten Holdings (as a % of Net Assets)

New York State Dormitory Auth., Tender Option Bond Trust Receipts
2.5%
Illinois Fin. Auth., Northwestern Univ.
1.8
South Carolina Public Service Auth.
1.8
RIB Floster, Tender Option Bond Trust Receipts
1.8
Houston Combined Utility System
1.7
Virginia Housing Dev. Auth., Tender Option Bond Trust Receipts
1.7
Clark County Dept. of Aviation
1.7
Illinois Fin. Auth., Steppenwolf Theatre Company Project
1.6
Harris County Health Fac. Dev., Methodist Hosp. System
1.6
Univ. of Texas, Board of Regents
1.6
Material Fund Change [Text Block]
Updated Prospectus Web Address www.troweprice.com/paperless