XML 14 R1.htm IDEA: XBRL DOCUMENT v3.20.4
Cover - USD ($)
$ in Billions
 12 Months Ended
Dec. 31, 2020
Feb. 16, 2021
Jun. 30, 2020
Document Information [Line Items]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2020    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 1-12162    
Entity Registrant Name BorgWarner Inc.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 13-3404508    
Entity Address, Address Line One 3850 Hamlin Road    
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 754-9200    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
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    
ICFR Auditor Attestation Flag true    
Entity Shell Company false    
Entity Public Float     $ 7.2
Entity Common Stock, Shares Outstanding   239,021,056  
Documents Incorporated by Reference
DOCUMENTS INCORPORATED BY REFERENCE
Portions of the following documents are incorporated herein by reference into the Part of the Form 10-K indicated.
DocumentPart of Form 10-K into which incorporated
Portions of the BorgWarner Inc. Proxy Statement for the 2021 Annual Meeting of StockholdersPart III
    
Entity Central Index Key 0000908255    
Amendment Flag false    
Document Fiscal Year Focus 2020    
Document Fiscal Period Focus FY    
Common Stock, par value $0.01 per share      
Document Information [Line Items]      
Title of each class Common Stock, par value $0.01 per share    
Trading symbol(s) BWA    
Name of each exchange on which registered NYSE    
Senior Notes      
Document Information [Line Items]      
Title of each class 1.80% Senior Notes due 2022    
Trading symbol(s) BWA22    
Name of each exchange on which registered NYSE