Annual report pursuant to Section 13 and 15(d)

Cover Page

v3.23.1
Cover Page - USD ($)
 12 Months Ended
Dec. 31, 2022
Mar. 20, 2023
Jun. 30, 2022
Document Information [Line Items]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2022    
Document Transition Report false    
Entity File Number 001-40441    
Entity Registrant Name Post Holdings Partnering Corporation    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 86-1759669    
Entity Address, Address Line One 2503 S. Hanley Road    
Entity Address, City or Town St. Louis    
Entity Address, State or Province MO    
Entity Address, Postal Zip Code 63144    
City Area Code 314    
Local Phone Number 644-7600    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Non-accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company true    
Entity Ex Transition Period false    
ICFR Auditor Attestation Flag false    
Document Financial Statement Error Correction Flag false    
Document Financial Statement Restatement Recovery Analysis Flag false    
Entity Shell Company true    
Current Fiscal Year End Date --12-31    
Document Fiscal Year Focus 2022    
Document Fiscal Period Focus FY    
Amendment Flag false    
Entity Central Index Key 0001843716    
Entity Public Float     $ 295,850,000
Units, each consisting of one share of Series A Common Stock and one-third of one redeemable warrant      
Document Information [Line Items]      
Title of 12(b) Security Units, each consisting of one share of Series A Common Stock and one-third of one redeemable warrant    
Trading Symbol PSPC.U    
Security Exchange Name NYSE    
Series A common stock      
Document Information [Line Items]      
Title of 12(b) Security Series A Common Stock, par value $0.0001 per share    
Trading Symbol PSPC    
Security Exchange Name NYSE    
Entity Common Stock, Shares Outstanding (in shares)   35,590,000  
Redeemable warrants, each whole warrant exercisable for one share of Series A Common Stock at an exercise price of $11.50 per share      
Document Information [Line Items]      
Title of 12(b) Security Redeemable warrants, each whole warrant exercisable for one share of Series A Common Stock at an exercise price of $11.50 per share    
Trading Symbol PSPC WS    
Security Exchange Name NYSE    
Series F common stock      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding (in shares)   8,625,000