v3.26.3
Shareholder Report
 6 Months Ended
Aug. 31, 2026
USD ($)
Holding
Shareholder Report [Line Items]  
Document Type N-CSRS
Amendment Flag false
Registrant Name T. ROWE PRICE TAX-EFFICIENT FUNDS, INC.
Entity Central Index Key 0001038490
Entity Investment Company Type N-1A
Document Period End Date Aug. 31, 2026
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
C000005556  
Shareholder Report [Line Items]  
Fund Name Tax-Efficient Equity Fund
Class Name Investor Class
Trading Symbol PREFX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Tax-Efficient Equity Fund (the "fund") for the period of March 1, 2026 to August 31, 2026.
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)

Table Summary
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Tax-Efficient Equity Fund - Investor Class
$45
0.84%
Expenses Paid, Amount $ 45
Expense Ratio, Percent 0.84%
AssetsNet $ 1,515,319,000
Holdings Count | Holding 400
InvestmentCompanyPortfolioTurnover 9.90%
Additional Fund Statistics [Text Block]

What are some fund statistics?

Fund Statistics

Table Summary
Total Net Assets (000s)
$1,515,319
Number of Portfolio Holdings
400
Holdings [Text Block]

Sector Allocation (as a % of Net Assets)

Table Summary
Information Technology
53.6%
Communication Services
14.9
Industrials & Business Services
7.8
Consumer Discretionary
7.1
Health Care
6.6
Financials
6.1
Consumer Staples
1.8
Energy
0.8
Materials
0.6
Other
0.7

Top Ten Holdings (as a % of Net Assets)

Table Summary
NVIDIA
14.2%
Alphabet
10.2
Apple
7.3
Microsoft
6.2
Broadcom
4.7
Micron Technology
2.7
Eli Lilly
2.6
Meta Platforms
2.6
Tesla
2.4
Advanced Micro Devices
2.3
Material Fund Change [Text Block]
Updated Prospectus Web Address www.troweprice.com/paperless
C000193192  
Shareholder Report [Line Items]  
Fund Name Tax-Efficient Equity Fund
Class Name I Class
Trading Symbol TEEFX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Tax-Efficient Equity Fund (the "fund") for the period of March 1, 2026 to August 31, 2026.
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)

Table Summary
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Tax-Efficient Equity Fund - I Class
$36
0.68%
Expenses Paid, Amount $ 36
Expense Ratio, Percent 0.68%
AssetsNet $ 1,515,319,000
Holdings Count | Holding 400
InvestmentCompanyPortfolioTurnover 9.90%
Additional Fund Statistics [Text Block]

What are some fund statistics?

Fund Statistics

Table Summary
Total Net Assets (000s)
$1,515,319
Number of Portfolio Holdings
400
Holdings [Text Block]

Sector Allocation (as a % of Net Assets)

Table Summary
Information Technology
53.6%
Communication Services
14.9
Industrials & Business Services
7.8
Consumer Discretionary
7.1
Health Care
6.6
Financials
6.1
Consumer Staples
1.8
Energy
0.8
Materials
0.6
Other
0.7

Top Ten Holdings (as a % of Net Assets)

Table Summary
NVIDIA
14.2%
Alphabet
10.2
Apple
7.3
Microsoft
6.2
Broadcom
4.7
Micron Technology
2.7
Eli Lilly
2.6
Meta Platforms
2.6
Tesla
2.4
Advanced Micro Devices
2.3
Material Fund Change [Text Block]
Updated Prospectus Web Address www.troweprice.com/paperless