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Cover
Nov. 03, 2021
Aug. 04, 2021
Cover [Abstract]    
Document Period End Date Nov. 03, 2021  
Document Type 8-K  
Entity File Number 1-12162  
Entity Information [Line Items]    
Entity Registrant Name BORGWARNER INC.  
Entity Address, Postal Zip Code 48326  
Entity Address, Address Line One 3850 Hamlin Road,  
Entity Address, City or Town Auburn Hills,  
Entity Address, State or Province MI  
City Area Code   248
Local Phone Number   754-9200
Entity Emerging Growth Company false  
Written Communications false  
Soliciting Material false  
Pre-commencement Tender Offer false  
Pre-commencement Issuer Tender Offer false  
Entity Central Index Key 0000908255  
Amendment Flag false  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 13-3404508  
Common Stock    
Entity Information [Line Items]    
Title of 12(b) Security Common Stock, par value $0.01 per share  
Trading Symbol BWA  
Security Exchange Name NYSE  
Senior Notes Due May 2031 | Senior Notes    
Entity Information [Line Items]    
Title of 12(b) Security 1.00% Senior Notes due 2031  
Trading Symbol BWA31  
Security Exchange Name NYSE