Cover Page - shares	4 Months Ended
	Sep. 30, 2025	Nov. 07, 2025
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Transition Report	false
Document Period End Date	Sep. 30, 2025
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2025
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Central Index Key	0002078653
Entity File Number	001-42890
Entity Registrant Name	Range Capital Acquisition Corp II
Entity Incorporation, State or Country Code	E9
Entity Tax Identification Number	00-0000000
Entity Address, Address Line One	44 Main Street
Entity Address, Address Line Two	Cold Spring Harbor
Entity Address, City or Town	New York
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	11724
City Area Code	631
Local Phone Number	246-0340
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Shell Company	true
Units, each consisting of one Class A ordinary share and one-half of one redeemable warrant
Document Information [Line Items]
Title of 12(b) Security	Units, each consisting of one Class A ordinary share and one-half of one redeemable warrant
Trading Symbol	RNGTU
Security Exchange Name	NASDAQ
Class A ordinary shares, par value $0.0001 per share
Document Information [Line Items]
Title of 12(b) Security	Class A ordinary shares, par value $0.0001 per share
Trading Symbol	RNGT
Security Exchange Name	NASDAQ
Warrants, each whole warrant exercisable for one Class A ordinary share at an exercise price of $11.50
Document Information [Line Items]
Title of 12(b) Security	Warrants, each whole warrant exercisable for one Class A ordinary share at an exercise price of $11.50
Trading Symbol	RNGTW
Security Exchange Name	NASDAQ
Class A ordinary shares [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		23,660,000
Class B ordinary shares [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		7,666,667