v3.25.4
Basis of Presentation, Uses of Estimates and Significant Accounting Policies (Narrative) (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2025
USD ($)
Rate
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Gain (Loss) on Portfolio Actions $ 568    
Restructuring Costs 2,500    
Premiums 352,229 $ 308,810 $ 290,827
Investment and other income 3,920 5,202 4,089
Total reported medical costs 313,995 264,185 241,894
Total operating costs 428,603 367,991 339,264
Reserves for net collection (Provider loans and other customer balances) 799    
Accounts Receivable, after Allowance for Credit Loss, Current 23,018 22,365  
Revenue, Remaining Performance Obligation, Amount $ 11,700    
Revenue, Remaining Performance Obligation, Percentage | Rate 50.00%    
Other current receivables $ 29,697 26,089  
UncommittedReceivablesFinancingFacility 3,300    
Transfer of Financial Assets Accounted for as Sales, Cash Proceeds Received for Assets Derecognized, Amount 3,000    
Uncommitted Receivables Facility, Amount Collected 2,000    
Uncommitted Receivables Facility, Amount Collected but Not Remitted 1,000    
Inventory, Net $ 3,300 3,800  
Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration] Other Liabilities    
Goodwill, Impairment Loss $ 0 0 0
Impairment of Intangible Assets (Excluding Goodwill) 0 0 $ 0
Health savings account deposits 13,900 13,700  
Interest-Bearing Domestic Deposit, Certificates of Deposits $ 1,600 1,100  
Number Of Days Notice Required To Cancel Health Insurance Contract 30 days    
Real estate rationalization and workplace reductions      
Restructuring Costs $ 746    
Restructuring and other actions      
Premiums 122    
Investment and other income 397    
Total reported medical costs 623    
Total operating costs 1,400    
Contractual Reassessments      
Restructuring Costs 573    
Loss contract reserve for anticipated future losses      
Restructuring Costs 623    
Net valuation losses on equity securities      
Restructuring Costs 329    
Advance funding of United Health Foundation      
Restructuring Costs 250    
Optum Rx      
Gain (Loss) on Portfolio Actions 1,500    
Restructuring Costs 389    
Optum Insight      
Gain (Loss) on Portfolio Actions (68)    
Restructuring Costs 236    
Optum Health      
Gain (Loss) on Portfolio Actions (821)    
Restructuring Costs 1,700    
UnitedHealthcare      
Restructuring Costs $ 153    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 3 years    
Restricted Stock [Member] | Minimum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 2 years    
Restricted Stock [Member] | Maximum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 4 years    
Stock Options [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 4 years    
Share-based Compensation Arrangement by Share-based Payment Plan Award, Options, Award Exercisable Period 10 years    
Employee Stock Purchase Plan (ESPP) [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Offering Date 10.00%    
Health Insurance Product Line [Member]      
Short-duration Insurance Contracts, Historical Claims Duration, First 90 Days 0.90    
Products and services [Member]      
Accounts Receivable, after Allowance for Credit Loss, Current $ 9,700 9,900  
Pharmaceutical Manufacturer Rebates Receivable [Member]      
Other current receivables $ 13,600 $ 12,500