XML 117 R1.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Document and Entity Information - USD ($)
$ in Billions
 12 Months Ended
Dec. 31, 2019
Feb. 18, 2020
Jun. 28, 2019
Document Information [Line Items]      
Document Type 10-K    
Document Fiscal Period Focus FY    
Document Annual Report true    
Document Period End Date Dec. 31, 2019    
Document Transition Report false    
Amendment Flag false    
Document Fiscal Year Focus 2019    
Current Fiscal Year End Date --12-31    
Entity Central Index Key 0000100517    
Entity File Number 001-06033    
Entity Registrant Name United Airlines Holdings, Inc.    
Entity Address, Address Line One 233 South Wacker Drive,    
Entity Address, City or Town Chicago,    
Entity Address, State or Province IL    
Entity Address, Postal Zip Code 60606    
City Area Code (872)    
Local Phone Number 825-4000    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 36-2675207    
Title of 12(b) Security Common Stock, $0.01 par value    
Trading Symbol UAL    
Security Exchange Name NASDAQ    
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    
Entity Shell Company false    
Entity Public Float     $ 21.1
Entity Common Stock, Shares Outstanding   247,951,116  
Documents Incorporated by Reference
Certain information required by Items 10, 11, 12 and 13 of Part III of this Form 10-K is incorporated by reference for United Airlines Holdings, Inc. from its definitive proxy statement for its 2020 Annual Meeting of Stockholders.
    
United Airlines, Inc.      
Document Information [Line Items]      
Entity Central Index Key 0000319687    
Entity File Number 001-10323    
Entity Registrant Name United Airlines, Inc.    
Entity Address, Address Line One 233 South Wacker Drive,    
Entity Address, City or Town Chicago,    
Entity Address, State or Province IL    
Entity Address, Postal Zip Code 60606    
City Area Code (872)    
Local Phone Number 825-4000    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 74-2099724    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
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   1,000