S-K 1602(a)(4) Forepart, Adjusted NTBV	1 Months Ended
S-K 1602(a)(4) Forepart, Adjusted NTBV	Jun. 30, 2025 $ / shares
SPAC Forepart, Adjusted Net Tangible Book Value Per Share [Line Items]
Registered Offering Price per Share	$ 10
Over-allotment Option Exercised [Member]
SPAC Forepart, Adjusted Net Tangible Book Value Per Share [Line Items]
Net Tangible Book Value, Adjusted, per Share	7.69
Difference Between the Offering Price and the Adjusted Net Tangible Book Value, Per Share	2.88
Over-allotment Option Exercised [Member] \| Redemption at 25 Percent of Maximum [Member]
SPAC Forepart, Adjusted Net Tangible Book Value Per Share [Line Items]
Net Tangible Book Value, Adjusted, per Share	7.12
Difference Between the Offering Price and the Adjusted Net Tangible Book Value, Per Share	2.88
Over-allotment Option Exercised [Member] \| Redemption at 50 Percent of Maximum [Member]
SPAC Forepart, Adjusted Net Tangible Book Value Per Share [Line Items]
Net Tangible Book Value, Adjusted, per Share	6.16
Difference Between the Offering Price and the Adjusted Net Tangible Book Value, Per Share	3.84
Over-allotment Option Exercised [Member] \| Redemption at 75 Percent of Maximum [Member]
SPAC Forepart, Adjusted Net Tangible Book Value Per Share [Line Items]
Net Tangible Book Value, Adjusted, per Share	4.24
Difference Between the Offering Price and the Adjusted Net Tangible Book Value, Per Share	5.76
Over-allotment Option Exercised [Member] \| Redemption at 100 Percent of Maximum [Member]
SPAC Forepart, Adjusted Net Tangible Book Value Per Share [Line Items]
Net Tangible Book Value, Adjusted, per Share	(1.53)
Difference Between the Offering Price and the Adjusted Net Tangible Book Value, Per Share	11.53
Over-allotment Option Not Exercised [Member]
SPAC Forepart, Adjusted Net Tangible Book Value Per Share [Line Items]
Net Tangible Book Value, Adjusted, per Share	7.71
Over-allotment Option Not Exercised [Member] \| Redemption at 25 Percent of Maximum [Member]
SPAC Forepart, Adjusted Net Tangible Book Value Per Share [Line Items]
Net Tangible Book Value, Adjusted, per Share	7.14
Difference Between the Offering Price and the Adjusted Net Tangible Book Value, Per Share	2.86
Over-allotment Option Not Exercised [Member] \| Redemption at 50 Percent of Maximum [Member]
SPAC Forepart, Adjusted Net Tangible Book Value Per Share [Line Items]
Net Tangible Book Value, Adjusted, per Share	6.18
Difference Between the Offering Price and the Adjusted Net Tangible Book Value, Per Share	3.82
Over-allotment Option Not Exercised [Member] \| Redemption at 75 Percent of Maximum [Member]
SPAC Forepart, Adjusted Net Tangible Book Value Per Share [Line Items]
Net Tangible Book Value, Adjusted, per Share	4.28
Difference Between the Offering Price and the Adjusted Net Tangible Book Value, Per Share	5.72
Over-allotment Option Not Exercised [Member] \| Redemption at 100 Percent of Maximum [Member]
SPAC Forepart, Adjusted Net Tangible Book Value Per Share [Line Items]
Net Tangible Book Value, Adjusted, per Share	(1.45)
Difference Between the Offering Price and the Adjusted Net Tangible Book Value, Per Share	11.45
Offering Price of $10.00 Per Unit [Member] \| Over-allotment Option Exercised [Member]
SPAC Forepart, Adjusted Net Tangible Book Value Per Share [Line Items]
Net Tangible Book Value, Adjusted, per Share	7.69
Offering Price of $10.00 Per Unit [Member] \| Over-allotment Option Not Exercised [Member]
SPAC Forepart, Adjusted Net Tangible Book Value Per Share [Line Items]
Net Tangible Book Value, Adjusted, per Share	$ 7.71

FutureCrest Acquisition Corp. S-1