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Segment Financial Information (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Statement [Line Items] |  |  |  |
Premiums, revenues - unaffiliated customers | $ 77,442 | $ 72,339 | $ 232,327 | $ 217,599
Investment and other income | 1,643 | 997 | 3,651 | 2,910
Total revenues | 100,820 | 92,361 | 299,471 | 277,195
Earnings from operations | 8,708 | 8,526 | 24,514 | 24,669
Interest expense | (1,074) | (834) | (2,903) | (2,416)
Loss on sale of subsidiary and subsidiaries held for sale | (20) | 0 | (8,331) | 0
Earnings before income taxes | 7,614 | 7,692 | 13,280 | 22,253
Products |  |  |  |
Statement [Line Items] |  |  |  |
Revenue from Products and Services - unaffiliated customers | 12,631 | 10,354 | 36,751 | 31,272
Services |  |  |  |
Statement [Line Items] |  |  |  |
Revenue from Products and Services - unaffiliated customers | 9,104 | 8,671 | 26,742 | 25,414
Optum |  |  |  |
Statement [Line Items] |  |  |  |
Investment and other income | 836 | 403 | 1,781 | 1,261
Total revenues | 63,925 | 56,737 | 187,856 | 167,140
Earnings from operations | 4,496 | 3,934 | 11,903 | 11,376
Interest expense | 0 | 0 | 0 | 0
Loss on sale of subsidiary and subsidiaries held for sale | 0 |  | 0 |
Earnings before income taxes | 4,496 | 3,934 | 11,903 | 11,376
Unaffiliated Customers |  |  |  |
Statement [Line Items] |  |  |  |
Premiums, revenues - unaffiliated customers | 77,442 | 72,339 | 232,327 | 217,599
Total revenues | 99,177 | 91,364 | 295,820 | 274,285
Unaffiliated Customers | Products |  |  |  |
Statement [Line Items] |  |  |  |
Revenue from Products and Services - unaffiliated customers | 12,631 | 10,354 | 36,751 | 31,272
Unaffiliated Customers | Services |  |  |  |
Statement [Line Items] |  |  |  |
Revenue from Products and Services - unaffiliated customers | 9,104 | 8,671 | 26,742 | 25,414
Unaffiliated Customers | Optum |  |  |  |
Statement [Line Items] |  |  |  |
Premiums, revenues - unaffiliated customers | 5,818 | 5,630 | 17,460 | 16,385
Total revenues | 25,131 | 22,105 | 73,614 | 65,382
Unaffiliated Customers | Optum | Products |  |  |  |
Statement [Line Items] |  |  |  |
Revenue from Products and Services - unaffiliated customers | 12,631 | 10,354 | 36,751 | 31,272
Unaffiliated Customers | Optum | Services |  |  |  |
Statement [Line Items] |  |  |  |
Revenue from Products and Services - unaffiliated customers | 6,682 | 6,121 | 19,403 | 17,725
Affiliated Customers |  |  |  |
Statement [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Affiliated Customers | Optum |  |  |  |
Statement [Line Items] |  |  |  |
Total revenues | 37,958 | 34,229 | 112,461 | 100,497
Operating Segments | UnitedHealthcare |  |  |  |
Statement [Line Items] |  |  |  |
Investment and other income | 807 | 594 | 1,870 | 1,649
Total revenues | 74,853 | 69,853 | 224,076 | 210,552
Earnings from operations | 4,212 | 4,592 | 12,611 | 13,293
Interest expense | 0 | 0 | 0 | 0
Loss on sale of subsidiary and subsidiaries held for sale | (20) |  | (8,331) |
Earnings before income taxes | 4,192 | 4,592 | 4,280 | 13,293
Operating Segments | Optum Health |  |  |  |
Statement [Line Items] |  |  |  |
Investment and other income | 614 | 317 | 1,386 | 1,038
Total revenues | 25,917 | 23,864 | 79,698 | 70,785
Earnings from operations | 2,161 | 1,568 | 5,979 | 4,869
Interest expense | 0 | 0 | 0 | 0
Loss on sale of subsidiary and subsidiaries held for sale | 0 |  | 0 |
Earnings before income taxes | 2,161 | 1,568 | 5,979 | 4,869
Operating Segments | Optum Insight |  |  |  |
Statement [Line Items] |  |  |  |
Investment and other income | 104 | 35 | 159 | 80
Total revenues | 4,931 | 4,977 | 13,976 | 14,147
Earnings from operations | 791 | 1,109 | 1,827 | 2,984
Interest expense | 0 | 0 | 0 | 0
Loss on sale of subsidiary and subsidiaries held for sale | 0 |  | 0 |
Earnings before income taxes | 791 | 1,109 | 1,827 | 2,984
Operating Segments | Optum Rx |  |  |  |
Statement [Line Items] |  |  |  |
Investment and other income | 118 | 51 | 236 | 143
Total revenues | 34,207 | 28,857 | 97,457 | 84,921
Earnings from operations | 1,544 | 1,257 | 4,097 | 3,523
Interest expense | 0 | 0 | 0 | 0
Loss on sale of subsidiary and subsidiaries held for sale | 0 |  | 0 |
Earnings before income taxes | 1,544 | 1,257 | 4,097 | 3,523
Operating Segments | Unaffiliated Customers | UnitedHealthcare |  |  |  |
Statement [Line Items] |  |  |  |
Premiums, revenues - unaffiliated customers | 71,624 | 66,709 | 214,867 | 201,214
Total revenues | 74,046 | 69,259 | 222,206 | 208,903
Operating Segments | Unaffiliated Customers | UnitedHealthcare | Products |  |  |  |
Statement [Line Items] |  |  |  |
Revenue from Products and Services - unaffiliated customers | 0 | 0 | 0 | 0
Operating Segments | Unaffiliated Customers | UnitedHealthcare | Services |  |  |  |
Statement [Line Items] |  |  |  |
Revenue from Products and Services - unaffiliated customers | 2,422 | 2,550 | 7,339 | 7,689
Operating Segments | Unaffiliated Customers | Optum Health |  |  |  |
Statement [Line Items] |  |  |  |
Premiums, revenues - unaffiliated customers | 5,818 | 5,630 | 17,460 | 16,385
Total revenues | 9,855 | 9,320 | 29,671 | 26,800
Operating Segments | Unaffiliated Customers | Optum Health | Products |  |  |  |
Statement [Line Items] |  |  |  |
Revenue from Products and Services - unaffiliated customers | 84 | 61 | 205 | 156
Operating Segments | Unaffiliated Customers | Optum Health | Services |  |  |  |
Statement [Line Items] |  |  |  |
Revenue from Products and Services - unaffiliated customers | 3,953 | 3,629 | 12,006 | 10,259
Operating Segments | Unaffiliated Customers | Optum Insight |  |  |  |
Statement [Line Items] |  |  |  |
Premiums, revenues - unaffiliated customers | 0 | 0 | 0 | 0
Total revenues | 1,741 | 1,978 | 4,930 | 5,978
Operating Segments | Unaffiliated Customers | Optum Insight | Products |  |  |  |
Statement [Line Items] |  |  |  |
Revenue from Products and Services - unaffiliated customers | 41 | 40 | 123 | 119
Operating Segments | Unaffiliated Customers | Optum Insight | Services |  |  |  |
Statement [Line Items] |  |  |  |
Revenue from Products and Services - unaffiliated customers | 1,700 | 1,938 | 4,807 | 5,859
Operating Segments | Unaffiliated Customers | Optum Rx |  |  |  |
Statement [Line Items] |  |  |  |
Premiums, revenues - unaffiliated customers | 0 | 0 | 0 | 0
Total revenues | 13,535 | 10,807 | 39,013 | 32,604
Operating Segments | Unaffiliated Customers | Optum Rx | Products |  |  |  |
Statement [Line Items] |  |  |  |
Revenue from Products and Services - unaffiliated customers | 12,506 | 10,253 | 36,423 | 30,997
Operating Segments | Unaffiliated Customers | Optum Rx | Services |  |  |  |
Statement [Line Items] |  |  |  |
Revenue from Products and Services - unaffiliated customers | 1,029 | 554 | 2,590 | 1,607
Operating Segments | Affiliated Customers | UnitedHealthcare |  |  |  |
Statement [Line Items] |  |  |  |
Total revenues | 0 | 0 | 0 | 0
Operating Segments | Affiliated Customers | Optum Health |  |  |  |
Statement [Line Items] |  |  |  |
Total revenues | 15,448 | 14,227 | 48,641 | 42,947
Operating Segments | Affiliated Customers | Optum Insight |  |  |  |
Statement [Line Items] |  |  |  |
Total revenues | 3,086 | 2,964 | 8,887 | 8,089
Operating Segments | Affiliated Customers | Optum Rx |  |  |  |
Statement [Line Items] |  |  |  |
Total revenues | 20,554 | 17,999 | 58,208 | 52,174
Optum Eliminations |  |  |  |
Statement [Line Items] |  |  |  |
Investment and other income | 0 | 0 | 0 | 0
Total revenues | (1,130) | (961) | (3,275) | (2,713)
Earnings from operations | 0 | 0 | 0 | 0
Interest expense | 0 | 0 | 0 | 0
Loss on sale of subsidiary and subsidiaries held for sale | 0 |  | 0 |
Earnings before income taxes | 0 | 0 | 0 | 0
Optum Eliminations | Unaffiliated Customers |  |  |  |
Statement [Line Items] |  |  |  |
Premiums, revenues - unaffiliated customers | 0 | 0 | 0 | 0
Total revenues | 0 | 0 | 0 | 0
Optum Eliminations | Unaffiliated Customers | Products |  |  |  |
Statement [Line Items] |  |  |  |
Revenue from Products and Services - unaffiliated customers | 0 | 0 | 0 | 0
Optum Eliminations | Unaffiliated Customers | Services |  |  |  |
Statement [Line Items] |  |  |  |
Revenue from Products and Services - unaffiliated customers | 0 | 0 | 0 | 0
Optum Eliminations | Affiliated Customers |  |  |  |
Statement [Line Items] |  |  |  |
Total revenues | (1,130) | (961) | (3,275) | (2,713)
Corporate and Eliminations |  |  |  |
Statement [Line Items] |  |  |  |
Investment and other income | 0 | 0 | 0 | 0
Total revenues | (37,958) | (34,229) | (112,461) | (100,497)
Earnings from operations | 0 | 0 | 0 | 0
Interest expense | (1,074) | (834) | (2,903) | (2,416)
Loss on sale of subsidiary and subsidiaries held for sale | 0 |  | 0 |
Earnings before income taxes | (1,074) | (834) | (2,903) | (2,416)
Corporate and Eliminations | Unaffiliated Customers |  |  |  |
Statement [Line Items] |  |  |  |
Premiums, revenues - unaffiliated customers | 0 | 0 | 0 | 0
Total revenues | 0 | 0 | 0 | 0
Corporate and Eliminations | Unaffiliated Customers | Products |  |  |  |
Statement [Line Items] |  |  |  |
Revenue from Products and Services - unaffiliated customers | 0 | 0 | 0 | 0
Corporate and Eliminations | Unaffiliated Customers | Services |  |  |  |
Statement [Line Items] |  |  |  |
Revenue from Products and Services - unaffiliated customers | 0 | 0 | 0 | 0
Corporate and Eliminations | Affiliated Customers |  |  |  |
Statement [Line Items] |  |  |  |
Total revenues | $ (37,958) | $ (34,229) | $ (112,461) | $ (100,497)

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