v3.26.1
Cover - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2025
Mar. 11, 2026
Jun. 30, 2025
Document Information [Line Items]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2025    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 001-39544    
Entity Registrant Name Bakkt, Inc.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 41-2324812    
Entity Address, Address Line One One Liberty Plaza    
Entity Address, Address Line Two One Liberty Street    
Entity Address, City or Town New York    
Entity Address, State or Province NY    
Entity Address, Postal Zip Code 10006    
City Area Code 332    
Local Phone Number 203 3017    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Document Financial Statement Error Correction [Flag] false    
Entity Shell Company false    
Entity Public Float     $ 92.8
Entity Common Stock, Shares Outstanding (in shares)   30,562,096  
Documents Incorporated by Reference Portions of the registrant’s Proxy Statement relating to the 2026 Annual Meeting of Stockholders are incorporated by reference into Part III of this Annual Report on Form 10-K. The Proxy Statement will be filed with the Securities and Exchange Commission within 120 days after the end of the registrant’s fiscal year ended December 31, 2025.    
Amendment Flag false    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2025    
Entity Central Index Key 0001820302    
Class A Common Stock      
Document Information [Line Items]      
Title of 12(b) Security Class A Common Stock, par value $0.0001 per share    
Trading Symbol BKKT    
Security Exchange Name NYSE    
Warrants      
Document Information [Line Items]      
Title of 12(b) Security Warrants to purchase Class A Common Stock    
Trading Symbol BKKT WS    
Security Exchange Name NYSE