Cover - shares	3 Months Ended
Cover - shares	Mar. 31, 2026	May 13, 2026
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Transition Report	false
Entity Interactive Data Current	Yes
Amendment Flag	false
Document Period End Date	Mar. 31, 2026
Document Fiscal Year Focus	2026
Document Fiscal Period Focus	Q1
Entity Information [Line Items]
Entity Registrant Name	COLOMBIER ACQUISITION CORP. III
Entity Central Index Key	0002091024
Entity File Number	001-43096
Entity Tax Identification Number	98-1880474
Entity Incorporation, State or Country Code	E9
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Shell Company	true
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Incorporation, Date of Incorporation	Aug. 15, 2025
Entity Contact Personnel [Line Items]
Entity Address, Address Line One	375 South County Road
Entity Address, Address Line Two	Suite 220
Entity Address, City or Town	Palm Beach
Entity Address, State or Province	FL
Entity Address, Postal Zip Code	33480
Entity Phone Fax Numbers [Line Items]
City Area Code	(561)
Local Phone Number	223-9937
Units, each consisting of one Class A Ordinary Share and one-eighth of one redeemable Warrant
Entity Listings [Line Items]
Title of 12(b) Security	Units, each consisting of one Class A Ordinary Share and one-eighth of one redeemable Warrant
Trading Symbol	CLBR U
Security Exchange Name	NYSE
Class A Ordinary Shares, par value $0.0001 per share
Entity Listings [Line Items]
Title of 12(b) Security	Class A Ordinary Shares, par value $0.0001 per share
Trading Symbol	CLBR
Security Exchange Name	NYSE
Warrants, each whole Warrant exercisable for one Class A Ordinary Share at an exercise price of $11.50 per share
Entity Listings [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	CLBR WS
Security Exchange Name	NYSE
Class A Ordinary Shares
Entity Listings [Line Items]
Entity Common Stock, Shares Outstanding		30,050,000
Class B Ordinary Shares
Entity Listings [Line Items]
Entity Common Stock, Shares Outstanding		9,966,667

Colombier Acquisition Corp. III 10-Q