v3.25.2
Document and Entity Information Document - shares
 6 Months Ended
Jun. 30, 2025
Jul. 31, 2025
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 30, 2025  
Document Transition Report false  
Entity File Number 1-10864  
Entitiy Registrant Name UnitedHealth Group Incorporated  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 41-1321939  
Entity Address, Address Line One 1 Health Drive  
Entity Address, City or Town Eden Prairie,  
Entity Address, State or Province MN  
Entity Address, Postal Zip Code 55344  
Other Entity Address, Address line one 655 New York Avenue NW  
Other Entity Address, City or Town Washington,  
Other Entity Address, State or Province DC  
Other Entity Address, Postal Zip Code 20001  
City Area Code (800)  
Local Phone Number 328-5979  
Title of 12(b) Security Common Stock, $.01 par value  
Trading Symbol UNH  
Security Exchange Name NYSE  
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  
Entitiy Central Index Key 0000731766  
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   905,673,625