v3.25.3
Cover - shares
9 Months Ended
Sep. 30, 2025
Oct. 23, 2025
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Sep. 30, 2025  
Document Transition Report false  
Entity File Number 001-39275  
Entity Registrant Name APi Group Corporation  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 98-1510303  
Entity Address, Address Line One 1100 Old Highway 8 NW  
Entity Address, City or Town New Brighton  
Entity Address, State or Province MN  
Entity Address, Postal Zip Code 55112  
City Area Code 651  
Local Phone Number 636-4320  
Title of 12(b) Security Common Stock, par value $0.0001 per share  
Trading Symbol APG  
Security Exchange Name NYSE  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   415,905,916
Entity Central Index Key 0001796209  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2025  
Document Fiscal Period Focus Q3  
Amendment Flag false