S-K 1602(a)(4) Forepart, Adjusted NTBV	Oct. 31, 2025 $ / shares
Redemption at 25 Percent of Maximum [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	$ 6.71
Redemption at 25 Percent of Maximum [Member] \| Over-allotment Option Exercised [Member]
Spac Forepart Adjusted Net Tangible Book Value Per Share Line Items
Net Tangible Book Value, Adjusted, per Share	6.70
Redemption at 50 Percent of Maximum [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	5.86
Redemption at 50 Percent of Maximum [Member] \| Over-allotment Option Exercised [Member]
Spac Forepart Adjusted Net Tangible Book Value Per Share Line Items
Net Tangible Book Value, Adjusted, per Share	5.85
Redemption at 75 Percent of Maximum [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	4.30
Redemption at 75 Percent of Maximum [Member] \| Over-allotment Option Exercised [Member]
Spac Forepart Adjusted Net Tangible Book Value Per Share Line Items
Net Tangible Book Value, Adjusted, per Share	4.29
Redemption at 100 Percent of Maximum [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	0.60
Redemption at 100 Percent of Maximum [Member] \| Over-allotment Option Exercised [Member]
Spac Forepart Adjusted Net Tangible Book Value Per Share Line Items
Net Tangible Book Value, Adjusted, per Share	0.55
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	7.25
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	7.25
Difference between NTBV and Offering Price [Member] \| Redemption at 25 Percent of Maximum [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	3.29
Difference between NTBV and Offering Price [Member] \| Redemption at 25 Percent of Maximum [Member] \| Over-allotment Option Exercised [Member]
Spac Forepart Adjusted Net Tangible Book Value Per Share Line Items
Net Tangible Book Value, Adjusted, per Share	3.30
Difference between NTBV and Offering Price [Member] \| Redemption at 50 Percent of Maximum [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	4.14
Difference between NTBV and Offering Price [Member] \| Redemption at 50 Percent of Maximum [Member] \| Over-allotment Option Exercised [Member]
Spac Forepart Adjusted Net Tangible Book Value Per Share Line Items
Net Tangible Book Value, Adjusted, per Share	4.15
Difference between NTBV and Offering Price [Member] \| Redemption at 75 Percent of Maximum [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	5.70
Difference between NTBV and Offering Price [Member] \| Redemption at 75 Percent of Maximum [Member] \| Over-allotment Option Exercised [Member]
Spac Forepart Adjusted Net Tangible Book Value Per Share Line Items
Net Tangible Book Value, Adjusted, per Share	5.71
Difference between NTBV and Offering Price [Member] \| Redemption at 100 Percent of Maximum [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	9.40
Difference between NTBV and Offering Price [Member] \| Redemption at 100 Percent of Maximum [Member] \| Over-allotment Option Exercised [Member]
Spac Forepart Adjusted Net Tangible Book Value Per Share Line Items
Net Tangible Book Value, Adjusted, per Share	9.45
Without Over Allotment [Member] \| No Redemption [Member]
Spac Forepart Adjusted Net Tangible Book Value Per Share Line Items
Net Tangible Book Value, Adjusted, per Share	7.25
Without Over Allotment [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	6.71
Without Over Allotment [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	5.86
Without Over Allotment [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	4.30
Without Over Allotment [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	0.60
With Over Allotment [Member] \| No Redemption [Member]
Spac Forepart Adjusted Net Tangible Book Value Per Share Line Items
Net Tangible Book Value, Adjusted, per Share	7.25
With Over Allotment [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	6.70
With Over Allotment [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	5.85
With Over Allotment [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	4.29
With Over Allotment [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	$ 0.55

United Acquisition Corp. I S-1/A