v3.26.1
Segment Financial Information (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Statement [Line Items]      
Premiums, revenues - unaffiliated customers $ 87,561 $ 86,534  
Investment and other income 1,131 1,033  
Total revenues 111,721 109,575  
Total operating costs 102,731 100,456  
Earnings from operations 8,990 9,119  
Interest expense (955) (998)  
Loss on sale of subsidiary and subsidiaries held for sale (72) (15)  
Earnings before income taxes 7,963 8,106  
Total assets 312,644 309,790 $ 309,581
Purchases of property, equipment and capitalized software 763 898  
Depreciation and amortization 1,029 1,061  
Products      
Statement [Line Items]      
Revenue from Products and Services - unaffiliated customers 13,250 13,036  
Services      
Statement [Line Items]      
Revenue from Products and Services - unaffiliated customers 9,779 8,972  
Optum      
Statement [Line Items]      
Investment and other income 627 505  
Total revenues 63,749 63,885  
Total operating costs 60,453 59,992  
Earnings from operations 3,296 3,893  
Interest expense 0 0  
Earnings before income taxes 3,296 3,893  
Total assets 195,214 192,571  
Purchases of property, equipment and capitalized software 559 702  
Depreciation and amortization 811 842  
Unaffiliated Customers      
Statement [Line Items]      
Premiums, revenues - unaffiliated customers 87,561 86,534  
Total revenues 110,590 108,542  
Unaffiliated Customers | Products      
Statement [Line Items]      
Revenue from Products and Services - unaffiliated customers 13,250 13,036  
Unaffiliated Customers | Services      
Statement [Line Items]      
Revenue from Products and Services - unaffiliated customers 9,779 8,972  
Unaffiliated Customers | Optum      
Statement [Line Items]      
Premiums, revenues - unaffiliated customers 4,575 5,021  
Total revenues 24,829 24,453  
Unaffiliated Customers | Optum | Products      
Statement [Line Items]      
Revenue from Products and Services - unaffiliated customers 13,250 13,036  
Unaffiliated Customers | Optum | Services      
Statement [Line Items]      
Revenue from Products and Services - unaffiliated customers 7,004 6,396  
Affiliated Customers      
Statement [Line Items]      
Total revenues 0 0  
Affiliated Customers | Optum      
Statement [Line Items]      
Total revenues 38,293 38,927  
Operating Segments | UnitedHealthcare      
Statement [Line Items]      
Investment and other income 504 528  
Total revenues 86,265 84,617  
Total operating costs 80,571 79,391  
Earnings from operations 5,694 5,226  
Interest expense 0 0  
Loss on sale of subsidiary and subsidiaries held for sale (72) (15)  
Earnings before income taxes 5,622 5,211  
Total assets 129,027 131,902  
Purchases of property, equipment and capitalized software 204 196  
Depreciation and amortization 218 219  
Operating Segments | Optum      
Statement [Line Items]      
Loss on sale of subsidiary and subsidiaries held for sale 0 0  
Operating Segments | Optum Health      
Statement [Line Items]      
Investment and other income 244 225  
Total revenues 24,109 24,837  
Total operating costs 22,968 23,426  
Earnings from operations 1,141 1,411  
Interest expense 0 0  
Loss on sale of subsidiary and subsidiaries held for sale 0 0  
Earnings before income taxes 1,141 1,411  
Total assets 73,620 72,000  
Purchases of property, equipment and capitalized software 184 264  
Depreciation and amortization 246 255  
Operating Segments | Optum Insight      
Statement [Line Items]      
Investment and other income 342 233  
Total revenues 5,125 5,027  
Total operating costs 4,162 3,863  
Earnings from operations 963 1,164  
Interest expense 0 0  
Loss on sale of subsidiary and subsidiaries held for sale 0 0  
Earnings before income taxes 963 1,164  
Total assets 63,099 60,192  
Purchases of property, equipment and capitalized software 306 353  
Depreciation and amortization 392 376  
Operating Segments | Optum Rx      
Statement [Line Items]      
Investment and other income 41 47  
Total revenues 35,736 35,132  
Total operating costs 34,544 33,814  
Earnings from operations 1,192 1,318  
Interest expense 0 0  
Loss on sale of subsidiary and subsidiaries held for sale 0 0  
Earnings before income taxes 1,192 1,318  
Total assets 58,495 60,379  
Purchases of property, equipment and capitalized software 69 85  
Depreciation and amortization 173 211  
Operating Segments | Unaffiliated Customers | UnitedHealthcare      
Statement [Line Items]      
Premiums, revenues - unaffiliated customers 82,986 81,513  
Total revenues 85,761 84,089  
Operating Segments | Unaffiliated Customers | UnitedHealthcare | Products      
Statement [Line Items]      
Revenue from Products and Services - unaffiliated customers 0 0  
Operating Segments | Unaffiliated Customers | UnitedHealthcare | Services      
Statement [Line Items]      
Revenue from Products and Services - unaffiliated customers 2,775 2,576  
Operating Segments | Unaffiliated Customers | Optum Health      
Statement [Line Items]      
Premiums, revenues - unaffiliated customers 4,575 5,021  
Total revenues 8,867 8,802  
Operating Segments | Unaffiliated Customers | Optum Health | Products      
Statement [Line Items]      
Revenue from Products and Services - unaffiliated customers 57 65  
Operating Segments | Unaffiliated Customers | Optum Health | Services      
Statement [Line Items]      
Revenue from Products and Services - unaffiliated customers 4,235 3,716  
Operating Segments | Unaffiliated Customers | Optum Insight      
Statement [Line Items]      
Premiums, revenues - unaffiliated customers 0 0  
Total revenues 1,665 1,703  
Operating Segments | Unaffiliated Customers | Optum Insight | Products      
Statement [Line Items]      
Revenue from Products and Services - unaffiliated customers 45 44  
Operating Segments | Unaffiliated Customers | Optum Insight | Services      
Statement [Line Items]      
Revenue from Products and Services - unaffiliated customers 1,620 1,659  
Operating Segments | Unaffiliated Customers | Optum Rx      
Statement [Line Items]      
Premiums, revenues - unaffiliated customers 0 0  
Total revenues 14,297 13,948  
Operating Segments | Unaffiliated Customers | Optum Rx | Products      
Statement [Line Items]      
Revenue from Products and Services - unaffiliated customers 13,148 12,927  
Operating Segments | Unaffiliated Customers | Optum Rx | Services      
Statement [Line Items]      
Revenue from Products and Services - unaffiliated customers 1,149 1,021  
Operating Segments | Affiliated Customers | UnitedHealthcare      
Statement [Line Items]      
Total revenues 0 0  
Operating Segments | Affiliated Customers | Optum Health      
Statement [Line Items]      
Total revenues 14,998 15,810  
Operating Segments | Affiliated Customers | Optum Insight      
Statement [Line Items]      
Total revenues 3,118 3,091  
Operating Segments | Affiliated Customers | Optum Rx      
Statement [Line Items]      
Total revenues 21,398 21,137  
Optum Eliminations      
Statement [Line Items]      
Investment and other income 0 0  
Total revenues (1,221) (1,111)  
Total operating costs (1,221) (1,111)  
Earnings from operations 0 0  
Interest expense 0 0  
Loss on sale of subsidiary and subsidiaries held for sale 0 0  
Earnings before income taxes 0 0  
Total assets 0 0  
Purchases of property, equipment and capitalized software 0 0  
Depreciation and amortization 0 0  
Optum Eliminations | Unaffiliated Customers      
Statement [Line Items]      
Premiums, revenues - unaffiliated customers 0 0  
Total revenues 0 0  
Optum Eliminations | Unaffiliated Customers | Products      
Statement [Line Items]      
Revenue from Products and Services - unaffiliated customers 0 0  
Optum Eliminations | Unaffiliated Customers | Services      
Statement [Line Items]      
Revenue from Products and Services - unaffiliated customers 0 0  
Optum Eliminations | Affiliated Customers      
Statement [Line Items]      
Total revenues (1,221) (1,111)  
Corporate and Eliminations      
Statement [Line Items]      
Investment and other income 0 0  
Total revenues (38,293) (38,927)  
Total operating costs (38,293) (38,927)  
Earnings from operations 0 0  
Interest expense (955) (998)  
Loss on sale of subsidiary and subsidiaries held for sale 0 0  
Earnings before income taxes (955) (998)  
Total assets (11,597) (14,683)  
Purchases of property, equipment and capitalized software 0 0  
Depreciation and amortization 0 0  
Corporate and Eliminations | Unaffiliated Customers      
Statement [Line Items]      
Premiums, revenues - unaffiliated customers 0 0  
Total revenues 0 0  
Corporate and Eliminations | Unaffiliated Customers | Products      
Statement [Line Items]      
Revenue from Products and Services - unaffiliated customers 0 0  
Corporate and Eliminations | Unaffiliated Customers | Services      
Statement [Line Items]      
Revenue from Products and Services - unaffiliated customers 0 0  
Corporate and Eliminations | Affiliated Customers      
Statement [Line Items]      
Total revenues $ (38,293) $ (38,927)