DESCRIPTION OF ORGANIZATION AND BUSINESS OPERATIONS (Details) - USD ($)		4 Months Ended
	Jan. 20, 2026	Dec. 31, 2025
DESCRIPTION OF ORGANIZATION AND BUSINESS OPERATIONS
Minimum aggregate fair market value as a percentage of the net assets held in the trust account		80.00%
Threshold percentage of outstanding voting securities of the target to be acquired by post-transaction company to complete business combination		50.00%
Share redemption percentage		15.00%
Threshold period to complete business combination		24 months
Threshold period to redeem public shares		10 days
Share redemption percentage		100.00%
Maximum value of dissolution expense		$ 100,000
Subsequent events
DESCRIPTION OF ORGANIZATION AND BUSINESS OPERATIONS
Price per unit held in trust account	$ 10
$15 Private Warrants
DESCRIPTION OF ORGANIZATION AND BUSINESS OPERATIONS
Exercise price per warrant		$ 15
$15 Private Warrants \| Subsequent events
DESCRIPTION OF ORGANIZATION AND BUSINESS OPERATIONS
Exercise price per warrant	15
Price per warrant issued	$ 0.1
Number of securities called by each warrant	1
Public Shares \| Subsequent events
DESCRIPTION OF ORGANIZATION AND BUSINESS OPERATIONS
Number of units issued	20,000,000
Price per unit issued	$ 10
Number of shares in a unit	1
Initial public offering and over allotment \| Subsequent events
DESCRIPTION OF ORGANIZATION AND BUSINESS OPERATIONS
Number of units issued	23,000,000
Price per unit issued	$ 10
Private placement \| Subsequent events
DESCRIPTION OF ORGANIZATION AND BUSINESS OPERATIONS
Number of securities called by each warrant	1
Private placement \| $15 Private Warrants \| Subsequent events
DESCRIPTION OF ORGANIZATION AND BUSINESS OPERATIONS
Exercise price per warrant	$ 15
Private placement \| Private Unit Warrant \| Subsequent events
DESCRIPTION OF ORGANIZATION AND BUSINESS OPERATIONS
Exercise price per warrant	$ 11.5
Number of shares in a unit	1
Number of warrants in a unit	0.5
Number of securities called by each warrant	1
Private placement \| Sponsor \| Subsequent events
DESCRIPTION OF ORGANIZATION AND BUSINESS OPERATIONS
Number of units issued	275,000
Price per unit issued	$ 10
Number of warrants issued	1,000,000
Private placement \| Sponsor \| $15 Private Warrants \| Subsequent events
DESCRIPTION OF ORGANIZATION AND BUSINESS OPERATIONS
Number of warrants issued	1,000,000
Exercise price per warrant	$ 15
Price per warrant issued	$ 0.1
Private placement \| Sponsor \| Private Unit Warrant \| Subsequent events
DESCRIPTION OF ORGANIZATION AND BUSINESS OPERATIONS
Number of units issued	275,000
Price per unit issued	$ 10

FG Imperii Acquisition Corp. 10-K