S-K 1602(a)(4) Forepart, Adjusted NTBV - $ / shares	3 Months Ended
S-K 1602(a)(4) Forepart, Adjusted NTBV - $ / shares	Mar. 31, 2025	Jul. 25, 2025
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	$ 7.08
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	6.43
Difference Between the Offering Price and the Adjusted Net Tangible Book Value, Per Share	3.57
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	5.4
Difference Between the Offering Price and the Adjusted Net Tangible Book Value, Per Share	4.6
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	3.53
Difference Between the Offering Price and the Adjusted Net Tangible Book Value, Per Share	6.47
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	(0.9)
Difference Between the Offering Price and the Adjusted Net Tangible Book Value, Per Share	10.9
Over-allotment Option Not Exercised [Member]
SPAC Forepart, Adjusted Net Tangible Book Value Per Share [Line Items]
Net Tangible Book Value, Adjusted, per Share	7.07
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	6.42
Difference Between the Offering Price and the Adjusted Net Tangible Book Value, Per Share	3.58
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	5.38
Difference Between the Offering Price and the Adjusted Net Tangible Book Value, Per Share	4.62
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	3.52
Difference Between the Offering Price and the Adjusted Net Tangible Book Value, Per Share	6.48
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	(0.9)
Difference Between the Offering Price and the Adjusted Net Tangible Book Value, Per Share	10.9
Offering Price of $10.00 [Member] \| Over-allotment Option Exercised [Member]
SPAC Forepart, Adjusted Net Tangible Book Value Per Share [Line Items]
Net Tangible Book Value, Adjusted, per Share	7.08
Offering Price of $10.00 [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	$ 7.07

Chenghe Acquisition III Co. S-1/A