XML 20 R1.htm IDEA: XBRL DOCUMENT v3.20.4
Cover - USD ($)
$ in Billions
 12 Months Ended
Dec. 31, 2020
Feb. 03, 2021
Jun. 30, 2020
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2020    
Document Transition Report false    
Entity File Number 1-7657    
Entity Registrant Name American Express Co    
Entity Incorporation, State or Country Code NY    
Entity Tax Identification Number 13-4922250    
Entity Address, Address Line One 200 Vesey Street    
Entity Address, City or Town New York    
Entity Address, State or Province NY    
Entity Address, Postal Zip Code 10285    
City Area Code 212    
Local Phone Number 640-2000    
Title of 12(b) Security Common Shares (par value $0.20 per Share)    
Trading Symbol AXP    
Security Exchange Name NYSE    
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     $ 76.6
Entity Common Stock, Shares Outstanding   805,588,980  
Documents Incorporated by Reference
DOCUMENTS INCORPORATED BY REFERENCE
Part III: Portions of Registrant’s Proxy Statement to be filed with the Securities and Exchange Commission in connection with the Annual Meeting of Shareholders to be held on May 4, 2021.
    
Document Fiscal Year Focus 2020    
Document Fiscal Period Focus FY    
Entity Central Index Key 0000004962    
Current Fiscal Year End Date --12-31    
Amendment Flag false