FINANCIAL HIGHLIGHTS (Details)				3 Months Ended		12 Months Ended
		Jan. 08, 2024 USD ($) Bitcoin CreationUnits $ / shares $ / item shares	Dec. 15, 2023 USD ($) $ / shares shares	Mar. 31, 2024 USD ($) Bitcoin $ / shares shares		Mar. 31, 2025 USD ($) Bitcoin $ / shares shares	Jan. 10, 2024 USD ($) Bitcoin $ / shares
Financial Highlights [Abstract]
Stock issued during the period shares new issues (in Shares) | shares				8,250,000		7,850,000
Stock redeemed during the period value	[1]			$ 0		$ 348,622,461
Quantity of bitcoin (in Bitcoin) | Bitcoin				4,842.9986		4,956.3464	58
Net assets				$ 341,901,105	[2]	$ 410,857,343	$ 2,665,457	[2]
Net asset value per Share, end of year (in Dollars per share) | $ / shares				$ 40.95		$ 48.05	$ 26.65	[3]
Franklin Bitcoin ETF [Member]
Financial Highlights [Abstract]
Stock issued during the period shares new issues (in Shares) | shares				8,250,000		7,850,000
Stock redeemed during the period value	[4]			$ 0		$ 348,622,461
Quantity of bitcoin (in Bitcoin) | Bitcoin				4,842.9986		4,956.3464	58
Net assets				$ 341,901,105	[2]	$ 410,857,343	$ 2,665,457	[2]
Net asset value per Share, end of year (in Dollars per share) | $ / shares				$ 40.95		$ 48.05	$ 26.65	[5]
Minimum [Member]
Financial Highlights [Abstract]
Net investment loss (in Dollars per share) | $ / shares						0.01
Minimum [Member] | Franklin Bitcoin ETF [Member]
Financial Highlights [Abstract]
Net investment loss (in Dollars per share) | $ / shares						$ 0.01
Initial Seed Shares [Member]
Financial Highlights [Abstract]
Stock issued during the period shares new issues (in Shares) | shares			4,000
Shares issued, price per share (in Dollars per share) | $ / shares			$ 25
Proceeds from issuance of shares			$ 100,000
Stock redeemed during the period value		$ 100,000
Initial Seed Shares [Member] | Franklin Bitcoin ETF [Member]
Financial Highlights [Abstract]
Stock issued during the period shares new issues (in Shares) | shares			4,000
Shares issued, price per share (in Dollars per share) | $ / shares			$ 25
Proceeds from issuance of shares			$ 100,000
Stock redeemed during the period value		$ 100,000
Seed Creation Units [Member]
Financial Highlights [Abstract]
Stock issued during the period shares new issues (in Shares) | shares		100,000
Proceeds from issuance of shares		$ 2,608,467.81
Number of creation units (in CreationUnits) | CreationUnits		2
Seed Creation Units [Member] | Franklin Bitcoin ETF [Member]
Financial Highlights [Abstract]
Stock issued during the period shares new issues (in Shares) | shares		100,000
Proceeds from issuance of shares		$ 2,608,467.81
Number of creation units (in CreationUnits) | CreationUnits		2
Bitcoin [Member]
Financial Highlights [Abstract]
Number of bitcoins per creation unit		29
Number of bitcoins per share (in Bitcoins per share)		0.00058
Quantity of bitcoin (in Bitcoin) | Bitcoin		58		4,842.9986		4,956.3464
Cost of Bitcoin per unit (in Dollars per Item) | $ / item		44,973.58
Net assets		$ 2,723,812.24
Net asset value per Share, end of year (in Dollars per share) | $ / shares		$ 27.24
Bitcoin [Member] | Franklin Bitcoin ETF [Member]
Financial Highlights [Abstract]
Number of bitcoins per creation unit		29
Number of bitcoins per share (in Bitcoins per share)		0.00058
Quantity of bitcoin (in Bitcoin) | Bitcoin		58		4,842.9986		4,956.3464
Cost of Bitcoin per unit (in Dollars per Item) | $ / item		44,973.58
Net assets		$ 2,723,812.24
Net asset value per Share, end of year (in Dollars per share) | $ / shares		$ 27.24

[1] Dollar amount of balance represents the cumulative fair value of creation of shares less the redemption of shares, at the time of the specific creation or redemption.

[2] On December 15, 2023, prior to the commencement of the Fund’s operations, Franklin Resources, Inc., an affiliate of the Sponsor (the “Seed Capital Investor”) purchased 4,000 Shares at a per-Share price equal to $25.00 (the “Initial Seed Shares”). Delivery of the Initial Seed Shares was made on December 15, 2023. Total proceeds to the Fund from the sale of the Initial Seed Shares were $100,000. On January 8, 2024, the Initial Seed Shares were redeemed for $100,000 and the Seed Capital Investor purchased two creation units in a cash transaction comprised of a total of 100,000 Shares at a per-Share price based on 29.00000000 bitcoins per Creation Unit (or 0.00058 bitcoins per Share), for a total of 58.00000000 bitcoins (the “Seed Creation Units”). The cash proceeds to the Fund from the sale of the Seed Creation Units were used by the Fund to purchase 58.00000000 bitcoins at the price of $44,973.58 per bitcoin on January 8, 2024. The transaction and other costs incurred in connection with the Seed Creation Units were paid by the Seed Capital Investor and not borne by the Fund. Thus, the ultimate total proceeds to the Fund from the sale of the Seed Creation Units were $2,608,467.81 (an amount representing 58.00000000 bitcoins).

[3] The amount shown represents the NAV per share at commencement of the Fund’s investment operations. This amount includes proceeds to the Fund from the initial bitcoin seed creation transaction conducted on January 8, 2024. Prior to January 8, 2024, 4,000 shares were acquired on December 15, 2023 at per share value of $25. Total proceeds to the Fund from the sale of the Initial Seed Shares were $100,000. On January 8, 2024, the Initial Seed Shares were redeemed for $100,000 and the Seed Capital Investor purchased two creation units in a cash transaction comprised of a total of 100,000 Shares at a per-Share price based on 29.00000000 bitcoins per Creation Unit (or 0.00058 bitcoins per Share), for a total of 58.00000000 bitcoins (the “Seed Creation Units”). The cash proceeds to the Fund from the sale of the Seed Creation Units were used by the Fund to purchase 58.00000000 bitcoins at the price of $44,973.58 per bitcoin on January 8, 2024. The transaction and other costs incurred in connection with the Seed Creation Units were paid by the Seed Capital Investor and not borne by the Fund. Thus, the ultimate total proceeds to the Fund from the sale of the Seed Creation Units were $2,608,467.81 (an amount representing 58.00000000 bitcoins). As of January 8, 2024, the net asset value of the Fund for transactions with Authorized Participants was $2,723,812.24 and the net asset value per Share of the Fund was $27.24.

[4] Dollar amount of balance represents the cumulative fair value of creation of shares less the redemption of shares, at the time of the specific creation or redemption.

[5] The amount shown represents the NAV per share at commencement of the Fund’s investment operations. This amount includes proceeds to the Fund from the initial bitcoin seed creation transaction conducted on January 8, 2024. Prior to January 8, 2024, 4,000 shares were acquired on December 15, 2023 at per share value of $25. Total proceeds to the Fund from the sale of the Initial Seed Shares were $100,000. On January 8, 2024, the Initial Seed Shares were redeemed for $100,000 and the Seed Capital Investor purchased two creation units in a cash transaction comprised of a total of 100,000 Shares at a per-Share price based on 29.00000000 bitcoins per Creation Unit (or 0.00058 bitcoins per Share), for a total of 58.00000000 bitcoins (the “Seed Creation Units”). The cash proceeds to the Fund from the sale of the Seed Creation Units were used by the Fund to purchase 58.00000000 bitcoins at the price of $44,973.58 per bitcoin on January 8, 2024. The transaction and other costs incurred in connection with the Seed Creation Units were paid by the Seed Capital Investor and not borne by the Fund. Thus, the ultimate total proceeds to the Fund from the sale of the Seed Creation Units were $2,608,467.81 (an amount representing 58.00000000 bitcoins). As of January 8, 2024, the net asset value of the Fund for transactions with Authorized Participants was $2,723,812.24 and the net asset value per Share of the Fund was $27.24.