v3.26.1
Cover
Apr. 22, 2026
Entity Addresses [Line Items]  
Document Type 8-K
Amendment Flag false
Document Period End Date Apr. 22, 2026
Entity File Number 001-42435
Entity Registrant Name Roman DBDR Acquisition Corp. II
Entity Central Index Key 0002032528
Entity Tax Identification Number 00-0000000
Entity Incorporation, State or Country Code E9
Entity Address, Address Line One 3300 S. Dixie Highway, Suite 179
Entity Address, City or Town West Palm Beach
Entity Address, State or Province FL
Entity Address, Postal Zip Code 33405
City Area Code 650
Local Phone Number 618-2524
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Emerging Growth Company true
Elected Not To Use the Extended Transition Period false
Units, each consisting of one Class A ordinary share and one-half of one redeemable warrant [Member]  
Entity Addresses [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 DRDBU
Security Exchange Name NASDAQ
Common Class A [Member]  
Entity Addresses [Line Items]  
Title of 12(b) Security Class A ordinary shares, par value $0.0001 per share
Trading Symbol DRDB
Security Exchange Name NASDAQ
Warrants, each whole warrant exercisable for one Class A ordinary share at an exercise price of $11.50 per share [Member]  
Entity Addresses [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 per share
Trading Symbol DRDBW
Security Exchange Name NASDAQ
Former Address [Member]  
Entity Addresses [Line Items]  
Entity Address, Address Line One 9858 Clint Moore Road
Entity Address, Address Line Two Suite 205
Entity Address, City or Town Boca Raton
Entity Address, State or Province FL
Entity Address, Postal Zip Code 33496