v3.26.1
Shareholder Report
 6 Months Ended
Jun. 30, 2026
USD ($)
Holdings
Shareholder Report [Line Items]  
Document Type N-CSRS
Amendment Flag false
Registrant Name Tidal Trust III
Entity Central Index Key 0001722388
Entity Investment Company Type N-1A
Document Period End Date Jun. 30, 2026
Shareholder Report Annual or Semi-Annual semi- annual shareholder report
MRP SynthEquity ETF  
Shareholder Report [Line Items]  
Fund Name MRP SynthEquity ETF
Class Name MRP SynthEquity ETF
Trading Symbol SNTH
Security Exchange Name NYSEArca
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the MRP SynthEquity ETF (the "Fund") for the period January 1, 2026 to June 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.SynthEquityETF.com. You can also request this information by contacting us at (844) 874-7383 or by writing to the MRP SynthEquity ETF, c/o U.S. Bank Global Fund Services, P.O. Box 701, Milwaukee, Wisconsin 53201-0701.
Additional Information Phone Number (844) 874-7383
Additional Information Website www.SynthEquityETF.com
Expenses [Text Block]

What were the Fund costs for the past six months?

(based on a hypothetical $10,000 investment)

Fund Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
MRP SynthEquity ETF
$49
0.95%*
*Costs paid as a percentage of $10,000 is an annualized figure.

 
Expenses Paid, Amount $ 49
Expense Ratio, Percent 0.95% [1]
Net Assets $ 243,507,000
Holdings Count | Holdings 12
Advisory Fees Paid, Amount $ 704,796
Investment Company, Portfolio Turnover 13.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of June 30, 2026 )

Fund Size (Thousands)
$243,507
Number of Holdings
12
Total Advisory Fee
$704,796
Portfolio Turnover Rate
13%
Holdings [Text Block]

Security Type - Investments

(% of Total Net Assets)

sector
%
U.S. Treasury Securities
0.766
Purchased Call Options
0.146
Purchased Put Options
0.001
Cash & Other
0.087
bar

Security Type - Other Financial Instruments

(% of Total Net Assets)

sector
%
Written Put Options
(0.0%)*
Written Call Options
(0.4%)
bar
*Does not round to 0.1% or (0.1%), as applicable.
Largest Holdings [Text Block]

What did the Fund invest in?

(as of June 30, 2026 )

 

Top Ten Holdings
(% of Total Net Assets)
United States Treasury Note/Bond, 4.38%, 12/15/2026
19.3%
United States Treasury Note/Bond, 4.25%, 03/15/2027
19.1%
United States Treasury Note/Bond, 4.63%, 09/15/2026
19.1%
United States Treasury Note/Bond, 3.75%, 06/30/2027
19.0%
State Street SPDR S&P 500 ETF Trust
Purchased Call Option, Expiration: 6/17/2027; Exercise Price: $735.00
10.2%
State Street SPDR S&P 500 ETF Trust
Purchased Call Option, Expiration: 6/17/2027; Exercise Price: $840.00
2.8%
S&P 500 Index Purchased Call Option, Expiration: 12/31/2026; Exercise Price: $4,000.00
1.6%
S&P 500 Index Purchased Put Option, Expiration: 12/31/2026; Exercise Price: $7,000.00
0.1%
State Street SPDR S&P 500 ETF Trust
Purchased Call Option, Expiration: 6/17/2027; Exercise Price: $780.00
0.0%*
S&P 500 Index Written Put Option,
Expiration: 12/31/2026; Exercise Price: $4,000.00
(0.0%)*
*Does not round to 0.1% or (0.1%), as applicable.
[1] Costs paid as a percentage of $10,000 is an annualized figure.