v3.26.3
Cover Page - shares
9 Months Ended
Sep. 30, 2026
Oct. 23, 2026
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Sep. 30, 2026  
Document Transition Report false  
Entity File Number 001-41708  
Entity Registrant Name PHINIA INC.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 92-2483604  
Entity Address, Address Line One 3000 University Drive  
Entity Address, City or Town Auburn Hills,  
Entity Address, State or Province MI  
Entity Address, Postal Zip Code 48326  
City Area Code (248)  
Local Phone Number 732-1900  
Title of 12(b) Security Common Stock, par value $0.01 per share  
Trading Symbol PHIN  
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   35,959,682
Entity Central Index Key 0001968915  
Amendment Flag false  
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q3  
Current Fiscal Year End Date --12-31