XML 11 R1.htm IDEA: XBRL DOCUMENT v3.20.2
Cover - shares
9 Months Ended
Sep. 30, 2020
Oct. 23, 2020
Entity Information [Line Items]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Sep. 30, 2020  
Document Transition Report false  
Entity File Number 001-07436  
Entity Registrant Name HSBC USA Inc.  
Entity Incorporation, State or Country Code MD  
Entity Tax Identification Number 13-2764867  
Entity Address, Address Line One 452 Fifth Avenue  
Entity Address, City or Town New York  
Entity Address, State or Province NY  
Entity Address, Postal Zip Code 10018  
City Area Code 212  
Local Phone Number 525-5000  
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 Common Stock, Shares Outstanding   714
Amendment Flag false  
Document Fiscal Year Focus 2020  
Document Fiscal Period Focus Q3  
Entity Central Index Key 0000083246  
Current Fiscal Year End Date --12-31  
Zero Coupon Callable Accreting Notes due January 15, 2043 [Member]    
Entity Information [Line Items]    
Title of 12(b) Security $100,000,000 Zero Coupon Callable Accreting Notes due January 15, 2043  
Trading Symbol HBA/43  
Security Exchange Name NYSE  
Zero Coupon Callable Accreting Notes due January 29, 2043 [Member]    
Entity Information [Line Items]    
Title of 12(b) Security $50,000,000 Zero Coupon Callable Accreting Notes due January 29, 2043  
Trading Symbol HBA/43A  
Security Exchange Name NYSE