v3.26.1
Shareholder Report
6 Months Ended
Jun. 30, 2026
USD ($)
$ / shares
Shareholder Report [Line Items]  
Document Type N-CSRS
Amendment Flag false
Registrant Name Grayscale Funds Trust
Entity Central Index Key 0001976672
Entity Investment Company Type N-1A
Document Period End Date Jun. 30, 2026
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Grayscale Bitcoin Adopters ETF  
Shareholder Report [Line Items]  
Fund Name Grayscale Bitcoin Adopters ETF
Class Name Grayscale Bitcoin Adopters ETF
Trading Symbol BCOR
Security Exchange Name NYSEArca
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Grayscale Bitcoin Adopters ETF (the “Fund”) for the period of  January 1, 2026 to June 30, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://etfs.grayscale.com/bcor. You can also request this information by contacting us at 1-866-775-0131.
Additional Information Phone Number 1-866-775-0131
Additional Information Website https://etfs.grayscale.com/bcor
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST 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*
Grayscale Bitcoin Adopters ETF
$27
0.59%
[1]
Expenses Paid, Amount $ 27
Expense Ratio, Percent 0.59%
Net Assets $ 2,221,908
Holdings Count | $ / shares 40
Advisory Fees Paid, Amount $ 8,734
Investment Company Portfolio Turnover 16.00%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of June 30, 2026)
Net Assets
$2,221,908
Number of Holdings
40
Net Advisory Fee
$8,734
Portfolio Turnover
16%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (% of net assets  as of  June 30, 2026)
Security Type
(%)
Common Stocks
99.3
%
Investments Purchased with Proceeds from Securities Lending
2.6
%
Money Market Funds
0.2
%
Cash & Other
-2.1
%
Top 10 Issuers
(%)
Tesla, Inc.
22.6
%
Strategy, Inc.
17.3
%
MercadoLibre, Inc.
5.2
%
Block, Inc.
5.1
%
Trump Media & Technology Group Corp.
4.7
%
Bullish
4.6
%
Coinbase Global, Inc.
4.3
%
Twenty One Capital, Inc.
4.2
%
Galaxy Digital, Inc.
4.0
%
Metaplanet, Inc.
4.0
%
Updated Prospectus Web Address https://etfs.grayscale.com/bcor
Grayscale Bitcoin Covered Call ETF  
Shareholder Report [Line Items]  
Fund Name Grayscale Bitcoin Covered Call ETF
Class Name Grayscale Bitcoin Covered Call ETF
Trading Symbol BTCC
Security Exchange Name NYSEArca
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Grayscale Bitcoin Covered Call ETF (the “Fund”) for the period of  January 1, 2026 to June 30, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://etfs.grayscale.com/btcc. You can also request this information by contacting us at 1-866-775-0131.
Additional Information Phone Number 1-866-775-0131
Additional Information Website https://etfs.grayscale.com/btcc
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST 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*
Grayscale Bitcoin Covered Call ETF
$28
0.65%
[2]
Expenses Paid, Amount $ 28
Expense Ratio, Percent 0.65%
Net Assets $ 13,427,364
Holdings Count | $ / shares 5
Advisory Fees Paid, Amount $ 56,864
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of June 30, 2026)
Net Assets
$13,427,364
Number of Holdings
5
Net Advisory Fee
$56,864
Portfolio Turnover
—%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (% of net assets  as of  June 30, 2026)
Security Type
(%)
U.S. Treasury Bills
85.5
%
Purchased Options
20.2
%
Money Market Funds
1.7
%
Written Options
-7.3
%
Cash & Other
-0.1
%
Top Issuers
(%)
United States Treasury Bill
85.5
%
Grayscale Bitcoin Trust ETF, Expiration: 12/18/2026; Exercise Price: $39.88
20.2
%
First American Government Obligations Fund - Class X
1.7
%
Grayscale Bitcoin Trust ETF, Expiration: 07/10/2026; Exercise Price: $47.28 (Short)
-1.0
%
Grayscale Bitcoin Trust ETF, Expiration: 12/18/2026; Exercise Price: $39.88 (Short)
-6.3
%
Updated Prospectus Web Address https://etfs.grayscale.com/btcc
Grayscale Bitcoin Miners ETF  
Shareholder Report [Line Items]  
Fund Name Grayscale Bitcoin Miners ETF
Class Name Grayscale Bitcoin Miners ETF
Trading Symbol MNRS
Security Exchange Name NYSEArca
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Grayscale Bitcoin Miners ETF (the “Fund”) for the period of  January 1, 2026 to June 30, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://etfs.grayscale.com/mnrs. You can also request this information by contacting us at 1-866-775-0131.
Additional Information Phone Number 1-866-775-0131
Additional Information Website https://etfs.grayscale.com/mnrs
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST 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*
Grayscale Bitcoin Miners ETF
$35
0.59%
[3]
Expenses Paid, Amount $ 35
Expense Ratio, Percent 0.59%
Net Assets $ 14,774,380
Holdings Count | $ / shares 27
Advisory Fees Paid, Amount $ 36,407
Investment Company Portfolio Turnover 23.00%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of June 30, 2026)
Net Assets
$14,774,380
Number of Holdings
27
Net Advisory Fee
$36,407
Portfolio Turnover
23%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (% of net assets  as of  June 30, 2026)
Security Type
(%)
Common Stocks
99.5
%
Investments Purchased with Proceeds from Securities Lending
31.3
%
Money Market Funds
0.8
%
Cash & Other
-31.6
%
Top 10 Issuers
(%)
IREN Ltd.
13.8
%
Hut 8 Corp.
12.1
%
Applied Digital Corp.
9.9
%
Riot Platforms, Inc.
4.7
%
MARA Holdings, Inc.
4.6
%
Bitdeer Technologies Group
4.4
%
Core Scientific, Inc.
4.3
%
Terawulf, Inc.
4.2
%
Cipher Digital, Inc.
4.2
%
Keel Infrastructure Corp.
4.2
%
Updated Prospectus Web Address https://etfs.grayscale.com/mnrs
Grayscale Bitcoin Premium Income ETF  
Shareholder Report [Line Items]  
Fund Name Grayscale Bitcoin Premium Income ETF
Class Name Grayscale Bitcoin Premium Income ETF
Trading Symbol BPI
Security Exchange Name NYSEArca
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Grayscale Bitcoin Premium Income ETF (the “Fund”) for the period of  January 1, 2026 to June 30, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://etfs.grayscale.com/bpi. You can also request this information by contacting us at 1-866-775-0131.
Additional Information Phone Number 1-866-775-0131
Additional Information Website https://etfs.grayscale.com/bpi
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST 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*
Grayscale Bitcoin Premium Income ETF
$27
0.65%
[4]
Expenses Paid, Amount $ 27
Expense Ratio, Percent 0.65%
Net Assets $ 2,873,994
Holdings Count | $ / shares 7
Advisory Fees Paid, Amount $ 10,543
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of June 30, 2026)
Net Assets
$2,873,994
Number of Holdings
7
Net Advisory Fee
$10,543
Portfolio Turnover
—%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (% of net assets  as of  June 30, 2026)
Security Type
(%)
U.S. Treasury Bills
82.8
%
Purchased Options
22.2
%
Money Market Funds
0.3
%
Written Options
-5.4
%
Cash & Other
0.1
%
Top Issuers
(%)
United States Treasury Bill
82.8
%
Grayscale Bitcoin Trust ETF, Expiration: 12/18/2026; Exercise Price: $38.51
22.2
%
First American Government Obligations Fund - Class X
0.3
%
Grayscale Bitcoin Trust ETF, Expiration: 07/17/2026; Exercise Price: $55.22 (Short)
0.0
%
Grayscale Bitcoin Trust ETF, Expiration: 07/17/2026; Exercise Price: $52.79 (Short)
0.0
%
Grayscale Bitcoin Trust ETF, Expiration: 07/17/2026; Exercise Price: $56.74 (Short)
0.0
%
Grayscale Bitcoin Trust ETF, Expiration: 12/18/2026; Exercise Price: $38.51 (Short)
-5.4
%
Updated Prospectus Web Address https://etfs.grayscale.com/bpi
Grayscale Ethereum Covered Call ETF  
Shareholder Report [Line Items]  
Fund Name Grayscale Ethereum Covered Call ETF
Class Name Grayscale Ethereum Covered Call ETF
Trading Symbol ETCO
Security Exchange Name NYSEArca
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Grayscale Ethereum Covered Call ETF (the “Fund”) for the period of  January 1, 2026 to June 30, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://etfs.grayscale.com/etco. You can also request this information by contacting us at 1-866-775-0131.
Additional Information Phone Number 1-866-775-0131
Additional Information Website https://etfs.grayscale.com/etco
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST 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*
Grayscale Ethereum Covered Call ETF
$26
0.65%
[5]
Expenses Paid, Amount $ 26
Expense Ratio, Percent 0.65%
Net Assets $ 3,510,945
Holdings Count | $ / shares 6
Advisory Fees Paid, Amount $ 16,790
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of June 30, 2026)
Net Assets
$3,510,945
Number of Holdings
6
Net Advisory Fee
$16,790
Portfolio Turnover
—%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (% of net assets  as of  June 30, 2026)
Security Type Breakdown
Security Type
(%)
U.S. Treasury Bills
84.8
%
Purchased Options
24.5
%
Money Market Funds
2.5
%
Written Options
-11.9
%
Cash & Other
0.1
%
Top Issuers
(%)
United States Treasury Bill
84.8
%
Grayscale Ethereum Staking Mini ETF, Expiration: 12/18/2026; Exercise Price: $12.78
24.5
%
First American Government Obligations Fund
2.5
%
Grayscale Ethereum Staking Mini ETF, Expiration: 07/10/2026; Exercise Price: $15.45 (Short)
-0.2
%
Grayscale Ethereum Staking Mini ETF, Expiration: 07/10/2026; Exercise Price: $15.28 (Short)
-3.0
%
Grayscale Ethereum Staking Mini ETF, Expiration: 12/18/2026; Exercise Price: $12.78 (Short)
-8.7
%
Updated Prospectus Web Address https://etfs.grayscale.com/etco
[1]
* Annualized
[2]
* Annualized
[3]
* Annualized
[4]
* Annualized
[5]
* Annualized