v3.25.2
Cover Page - shares
6 Months Ended
Jun. 30, 2025
Aug. 04, 2025
Entity Information [Line Items]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 30, 2025  
Document Transition Report false  
Entity File Number 1-11535  
Entity Registrant Name BURLINGTON NORTHERN SANTA FE, LLC  
Entity Incorporation, State Country Name DE  
Entity Tax Identification Number 27-1754839  
Entity Address, Address Line One 2650 Lou Menk Drive  
Entity Address, City or Town Fort Worth  
Entity Address, State or Province TX  
Entity Address, Postal Zip Code 76131  
City Area Code 800  
Local Phone Number 795-2673  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Central Index Key 0000934612  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2025  
Document Fiscal Period Focus Q2  
Amendment Flag false  
Entity Common Stock, Shares Outstanding   0