v3.26.1
Cover Page - USD ($)
 7 Months Ended
Dec. 31, 2025
Mar. 24, 2026
Jun. 30, 2025
Document Information [Line Items]      
Document Type 10-K    
Document Annual Report true    
Document Transition Report false    
Document Period End Date Dec. 31, 2025    
Current Fiscal Year End Date --12-31    
Document Fiscal Year Focus 2025    
Document Fiscal Period Focus FY    
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    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
ICFR Auditor Attestation Flag false    
Document Financial Statement Error Correction [Flag] false    
Auditor Name CBIZ CPAs P.C.    
Auditor Firm ID 199    
Auditor Location New York    
Entity Public Float     $ 0
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 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 [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